Patent Description:
With the increasing sophistication and advancement of the <NUM> communication technology, the <NUM> network is also gradually entering the commercial stage. Due to higher requirements on antennas by the <NUM> technology, the antennas are required to have high-rate transmission, larger system capacity, miniaturization, and dual-polarization characteristic simultaneously.

Conventional radiation units have bandwidth ranging from low frequencies to high frequencies. Since the wave length with respect to the low frequencies is longer than the wave length with respect to the frequencies, for a radiation unit having fixed size, when the low frequencies and the high frequencies are operated simultaneously, they will be influenced by each other, thereby affecting the frequency band extension of the radiation units and affecting the radiation performance of the antennas.

In the related art, several patents or patent applications have provided radiation units for <NUM> communication. For example, Japanese patent publication No. <CIT>, Chinese patent publication No. <CIT>, <CIT>, and <CIT>, <CIT>, and <CIT>.

As the low frequency wavelength is longer than the high frequency wavelength, for fixed size radiation unit, when the low frequency and high frequency work at the same time, they tend to interact with each other, thus affecting the radiation unit's frequency band expansion and affecting the radiation performance of the antenna.

According to an aspect, there is provided a radiation unit, including: two groups of dipoles the polarizations of which are orthogonal, each group of the dipoles includes two radiation arms which are disposed to be spaced apart relative to each other, and each of the radiation arms is provided with a first extension branch and a second extension branch which are disposed to be spaced apart from each other; wherein the surface area of the first extension branch is greater than the surface area of the second extension branch; wherein an outer sidewall of each of the radiation arms is provided with a cut-off corner; wherein each of the radiation arms is provided with a first hollowed groove, each of one end of the first extension branch and one end of the second extension branch is connected with the outer sidewall of each of the radiation arms, a first spacer groove in communication with the first hollowed groove is provided between the first extension branch and the second extension branch, and each of the first extension branch and the second extension branch is disposed towards the inside of the first hollowed groove; wherein a second spacer groove and a current-conducting part for connecting two adjacent radiation arms are provided between the two adjacent radiation arms, and each of the two adjacent radiation arms is provided with a second hollowed groove in communication with the second spacer groove.

The radiation unit of the above embodiment includes four radiation arms of the same shape and size, wherein two radiation arms which are disposed to be spaced apart and diagonal relative to each other fit to form a first group of dipoles, the other two radiation arms which are disposed to be spaced apart and diagonal relative to each other fit to form a second group of dipoles, and the two groups of dipoles the polarizations of which are orthogonal to each other are utilized to form dual-polarization radiation. Meanwhile, the first extension branches and the second extension branches which are disposed to be spaced apart from each other are disposed on respective radiation arms, so that the first extension branches and the second extension branches can be utilized to adjust the electrical lengths of the high frequencies and low frequencies of the radiation unit, thereby being able to achieve extension of the operating frequency band which is more than <NUM>% of the bandwidth, good radiation performance, and fulfil the use requirements of <NUM> antennas. Moreover, the radiation unit has a simple structure and is easy to produce, and the manufacturing cost is lowered.

The technical solution will be described further below.

In one of these embodiments, each of the radiation arms is provided with a first connecting portion for coupling feed with a feeding balun.

In one of these embodiments, a distance between a sidewall of the first hollowed groove and a sidewall of the second spacer groove ranges from <NUM> to <NUM>; and a width of the second hollowed groove ranges from <NUM> to <NUM>.

According to another aspect, there is provided a <NUM> antenna, including: the radiation unit; and feeding baluns which are in coupling feed with the radiation arms.

The <NUM> antenna in the above embodiments, when in use, performs coupling feed on the radiation arms by using the feeding baluns, so that it can be ensured that the radiation unit can radiate signals with good radiation performance in a stable and reliable manner. Meanwhile, the first extension branches and the second extension branches which are disposed to be spaced apart from each other are disposed on respective radiation arms of the radiation unit, thus the first extension branches and the second extension branches can be utilized to adjust the electrical lengths of the high frequencies and low frequencies of the radiation unit, thereby being able to achieve extension of the operating frequency band, achieve a very wide operating frequency band, and fulfil the use requirements of <NUM> antennas. The <NUM> antenna of the above embodiment, in the case of ultra-wideband being implemented, also has good impedance characteristics and cross-polarization ratio, and the production cost is low, which is suitable for the use requirements of <NUM> technology.

In one of these embodiments, the radiation unit further includes a substrate which is provided between the radiation arms and the feeding baluns, and the radiation arms are disposed on a surface of the substrate.

In one of these embodiments, each of the feeding baluns includes a first feeding component for the coupling feed with the first group of dipoles and a second feeding component for the coupling feed with the second group of dipoles, the first feeding component and the second feeding component being disposed to have an angle therebetween.

<NUM>, radiation unit, <NUM>, radiation arm, <NUM>, first extension branch, <NUM>, second extension branch, <NUM>, first hollowed groove, <NUM>, first spacer groove, <NUM>, second spacer groove, <NUM>, second hollowed groove, <NUM>, current-conducting part, <NUM>, cut-off corner, <NUM>, feeding socket, <NUM>, first feeding component, <NUM>, first media, <NUM>, first socket, <NUM>, third bump, <NUM>, first balun microstrip line, <NUM>, first branch, <NUM>, second branch, <NUM>, first microstrip ground piece, <NUM>, first bump, <NUM>, second feeding component, <NUM>, second media, <NUM>, second socket, <NUM>, fourth bump, <NUM>, second balun microstrip line, <NUM>, third branch, <NUM>, fourth branch, <NUM>, second microstrip ground piece, <NUM>, second bump, <NUM>, substrate.

In order to make the objectives, technical solutions and advantages of present invention clearer, hereafter, the present invention will be further described in detail with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description here is only for explaining the present invention and does not define the protection scope of the present invention.

It should be noted that when an element is referred to as being "disposed on" or "fixed to" another element, it can be directly on another element or intervening elements may be present.

When an element is "fixed to" another element or "fixedly connected to" another element, they are fixed in a detachable manner or they are fixed in a non-removable manner. When an element is considered to be "connected with", "rotately connected with" another element, it can be directly connected to another element or there are intervening elements present. The terms such as "perpendicular", "horizontal", "left", "right", "upper" and "lower" as well as similar expressions as used herein are for illustration purposes only, and do not represent the unique implementation.

Unless otherwise defined, all technical and scientific terms as used herein have the same meaning as meanings that are generally understood to one of ordinary skill in the art. The terms as used in the description of the invention herein are for the purpose of description only and are not intended to limit the present invention. The term " and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Similar words such as "first", ""second" and "third" in the present invention do not represent specific number or order, and are used merely to distinguish between names.

It should also be understood that when explaining an element, the element should be construed as including a error range although not explicitly described, the error range should be within an acceptable deviation from the specified value as determined by those skilled in the art. For example, "about", "approximately" or "substantially" may mean that it is in one or more standard derivations, which is not limited herein.

As shown in <FIG>, in one embodiment, there is provided a radiation unit <NUM> including two groups of dipoles the polarizations of which are orthogonal, each group of the dipoles includes two radiation arms <NUM> which are disposed to be spaced apart relative to each other, each of the radiation arms <NUM> is provided with a first extension branch <NUM> and a second extension branch <NUM> which are disposed to be spaced apart from each other.

The radiation unit <NUM> of the above embodiment includes four radiation arms <NUM> of the same shape and size, wherein two radiation arms <NUM> which are disposed to be spaced apart and diagonal relative to each other fit to form a first group of dipoles, the other two radiation arms <NUM> which are disposed to be spaced apart and diagonal relative to each other fit to form a second group of dipoles, and the two groups of dipoles the polarizations of which are orthogonal to each other are utilized to form dual-polarization radiation.

Meanwhile, the first extension branches <NUM> and the second extension branches <NUM> which are disposed to be spaced apart from each other are disposed on respective radiation arms <NUM>, so that the first extension branches <NUM> and the second extension branches <NUM> can be utilized to adjust the electrical lengths of the high frequencies and low frequencies of the radiation unit <NUM>, thereby being able to achieve extension of the operating frequency band which is more than <NUM>% of the bandwidth, good radiation performance, and fulfil the use requirements of <NUM> antennas. Moreover, the radiation unit <NUM> has a simple structure and is easy to produce, and the manufacturing cost is lowered.

It should be noted that the connecting end of the first extension branches <NUM> and the connecting end of the second extension branches <NUM> may be connected with outer sidewalls of respective radiation arms <NUM>, so that the first extension branches <NUM> and the second extension branches <NUM> can flexibly extend towards the outer sides or inner sides of the radiation arms <NUM>. The first extension branch <NUM> and the second extension branch <NUM> can be formed with the radiation arm <NUM> in an all-in-one manner or they can be formed separately to be assembled; the all-in-one manufacturing manner is preferred, which is simple and convenient, and lowers the manufacturing cost. The first extension branch <NUM> and the second extension branch <NUM> can be provided in structures of sheets, strips, etc. As shown in <FIG>, the radiation arm 110a and the radiation arm 110b form the first group of dipoles, and the radiation arm 110c and the radiation arm 110d form the second group of dipoles.

The surface area of the first extension branch <NUM> and the surface area of the second extension branch <NUM> can be flexibly adjusted simultaneously or separately according to the actual use cases, as long as the first extension branch <NUM> and the second extension branch <NUM> are enabled to extend the operating frequency band of the radiation unit <NUM>.

In one embodiment, the length (Li as shown in <FIG>) of the first extension branch <NUM> is adjustable. As such, by flexibly adjusting the length of the first extension branch <NUM>, the surface area of the first extension branch <NUM> is adjusted, the electrical length of the radiation unit <NUM> is adjusted, and in turn the operating frequency band of the radiation unit <NUM> is adjusted.

In one embodiment, the width (D<NUM> as shown in <FIG>) of the first extension branch <NUM> is adjustable. As such, by flexibly adjusting the width of the first extension branch <NUM>, the surface area of the first extension branch <NUM> is adjusted, the electrical length of the radiation unit <NUM> is adjusted, and in turn the operating frequency band of the radiation unit <NUM> is adjusted.

In one embodiment, the length (L<NUM> as shown in <FIG>) of second extension branch <NUM> is adjustable. As such, by flexibly adjusting the length of second extension branch <NUM>, the surface area of the second extension branch <NUM> is adjusted, the electrical length of the radiation unit <NUM> is adjusted, and in turn the operating frequency band of the radiation unit <NUM> is adjusted.

In one embodiment, the width (D<NUM> as shown in <FIG>) of second extension branch <NUM> is adjustable. As such, by flexibly adjusting the width of second extension branch <NUM>, the surface area of the second extension branch <NUM> is adjusted, the electrical length of the radiation unit <NUM> is adjusted, and in turn the operating frequency band of the radiation unit <NUM> is adjusted.

It should be noted that flexible adjustment can be at least made to one of the parameters including the length of the first extension branch <NUM>, the width of the first extension branch <NUM>, the length of the second extension branch <NUM> and the width of the second extension branch <NUM>, so that the electrical length of the radiation unit <NUM> can be adjusted, and in turn the operating frequency band of the radiation unit <NUM> can be adjusted.

As shown in <FIG>, in one embodiment, the surface area of the first extension branch <NUM> is greater than the surface area of the second extension branch <NUM>. As such, the first extension branch <NUM> can be utilized to extend the bandwidth of low frequencies, and the second extension branch <NUM> can be utilized to extend the bandwidth of the high frequencies. When adjusting the surface area of the first extension branch <NUM> by adjusting the length of the first extension branch <NUM> and adjusting the surface area of the second extension branch <NUM> by adjusting the length of the second extension branch <NUM>, it is preferred that the difference in length between the first extension branch <NUM> and the second extension branch <NUM> is within <NUM> in order not to affect the radiation performance of the radiation unit <NUM>.

In one embodiment, the surface area of the first extension branch <NUM> is equal to the surface area of the second extension branch <NUM>.

As such, when adjusting the surface area of the first extension branch <NUM> and the surface area of the second extension branch <NUM>, the electrical length of the radiation unit <NUM> can be adjusted to a greater extent, and in turn the operating frequency band of the radiation unit <NUM> can be adjusted to a greater extent.

On the basis of any of the above embodiments, each of the radiation arms <NUM> is provided with a first connecting portion for coupling feed with a feeding balun. As such, the use of the first connecting portions enables the easy and reliable connection of the feeding baluns to the radiation arms <NUM>, which in turn enables the coupling feed to the radiation arms <NUM> and ensures the radiation performance of the radiation unit <NUM>. Each of the first connecting portions can be provided as a feed jack or feeding socket <NUM> for ease of pluggable fitting.

As shown in <FIG>, on the basis of any of the above embodiments, an outer sidewall of each of the radiation arms <NUM> is provided with a cut-off corner <NUM>. As such, the cut-off corner <NUM> is effective in improving the influence between operating frequencies and enhancing the radiation performance of the radiation unit <NUM>. The size of the cut-off corner <NUM> can be flexibly adjusted according to the actual use requirements. The cut-off corner <NUM> can be disposed on a portion corresponding to the first extension branch <NUM> and the second extension branch <NUM>.

As shown in <FIG>, on the basis of any of the above embodiments, each of the radiation arms <NUM> is provided with a first hollowed groove <NUM>, each of one end of the first extension branch <NUM> and one end of the second extension branch <NUM> is connected with the outer sidewall of each of the radiation arms <NUM>. A first spacer groove <NUM> in communication with the first hollowed groove <NUM> is provided between the first extension branch <NUM> and the second extension branch <NUM>. In this way, the weights of the radiation arms <NUM> can be reduced, and light-weight antennas can be achieved. Moreover, the arrangement of the first hollowed groove <NUM> on the inner surface of the radiation arm <NUM> also improves the cross-polarization ratio of the radiation unit <NUM> and also increases the electrical lengths of the radiation arms <NUM>, extending the operating bandwidths of the radiation unit <NUM>.

Each of the first extension branch <NUM> and the second extension branch <NUM> is disposed towards the inside of the first hollowed groove <NUM>. As such, the structure of the radiation unit <NUM> can be made more compact, the projection area of the radiation unit <NUM> on the base plate is reduced, and the miniaturization of antenna can be achieved.

Of course, in other embodiments, it may be that the first extension branch <NUM> extends towards the interior of the first hollowed groove <NUM> and the second extension branch <NUM> extends towards the outer side of a respective radiation arm <NUM>; or it may be that the second extension branch <NUM> extends towards the interior of the first hollowed groove <NUM> and the first extension branch <NUM> extends towards the outer side of a respective radiation arm <NUM>; or it may be that each of the first extension branch <NUM> and the second extension branch <NUM> extends towards the exterior of the first hollowed groove <NUM>. It is only necessary to meet the requirement of enabling the first extension branch <NUM> and the second extension branch <NUM> to extend the operating frequency band of the radiation unit <NUM>.

Further, a hollowed area of the first hollowed groove <NUM> is adjustable. As such, the cross-polarization ratio of the radiation unit <NUM> can be adjusted by adjusting the hollowed area of the first hollowed groove <NUM>. The hollowed area refers to the size of the first hollowed groove <NUM>. For example, as shown in <FIG>, when the outline of the first hollowed groove <NUM> is a square, the side length of the square is adjusted, i.e., the hollowed area is adjustable.

As shown in <FIG>, in one embodiment, a second spacer groove <NUM> and a current-conducting part <NUM> for connecting two adjacent radiation arms <NUM> are provided between the two adjacent radiation arms <NUM>, and each of the two adjacent radiation arms <NUM> is provided with a second hollowed groove <NUM> in communication with the second spacer groove <NUM>. In this way, the use of the current-conducting part <NUM>, together with the second spacer groove <NUM> and the second hollowed groove <NUM>, enables the formation of a slow wave structure, thereby increasing the electrical lengths of the radiation arms <NUM> and thus broadening the operating frequency bands of the radiation unit <NUM>. Wherein the current-conducting part <NUM> can be provided as a sidewall in the width direction of the second hollowed groove <NUM> for easy of machining. The current-conducting part <NUM> can be provided in the form of a strip or sheet.

Further, a hollowed area of the second hollowed groove <NUM> is adjustable. As such, the electrical lengths of the radiation arms <NUM> can be adjusted by adjusting the widths of the second hollowed grooves <NUM>, thus the operating frequency band of the radiation unit <NUM> is adjusted. Wherein the adjustment of the hollowed area of the second hollowed groove <NUM> can be achieved by adjusting the width (H<NUM> as shown in <FIG>) or length (H<NUM> as shown in <FIG>) of the second hollowed groove <NUM>.

In one embodiment, the hollowed area of the first hollowed groove <NUM> is adjustable, and the hollowed area of the second hollowed groove <NUM> is adjustable accordingly. As such, the hollowed area of the first hollowed groove <NUM> is changed, the hollowed area of the second hollowed groove <NUM> can be adjusted accordingly, thus the radiation performance of the radiation unit <NUM> can be ensured.

In one embodiment, when the hollowed area of the first hollowed groove <NUM> becomes larger so that the distance (H<NUM>, as shown in <FIG>) between the sidewall of the first hollowed groove <NUM> and the sidewall of the second spacer groove <NUM> becomes narrower, the width of the second hollowed groove <NUM> is made smaller accordingly, thereby reducing the hollowed area of the second hollowed groove <NUM> and thereby improving the radiation performance of the radiation unit <NUM>. Preferably, the variation in distance between a sidewall of the first hollowed groove <NUM> and a sidewall of the second spacer groove <NUM> ranges from <NUM> to <NUM>, the variable in width of the second hollowed groove <NUM> ranges from <NUM> to <NUM>, and the radiation performance of the radiation unit <NUM> is ensured.

Of course, the adjustment of the hollowed area of the first hollowed groove <NUM>, the adjustment of the width of the second hollowed groove <NUM>, the adjustment of the surface area of the first extension branch <NUM> and the adjustment of the surface area of the second extension branch <NUM> can be chosen flexibly according to the actual use requirements; these adjustments can be conducted simultaneously, separately or in combination, as long as the radiation performance of the radiation unit <NUM> is ensured. Preferably, respective adjustments to the hollowed area of the first hollowed groove <NUM>, the hollowed area of the second hollowed groove <NUM>, the surface area of the first extension branch <NUM> and the surface area of the second extension branch <NUM> are conducted simultaneously, so that a relative bandwidth up to <NUM>% can be achieved and the range of the operating frequency band may be <NUM>~<NUM>.

As shown in <FIG>, in one embodiment, there is also provided a <NUM> antenna including the radiation unit <NUM> according to any of the above embodiments and feeding baluns which are in coupling feed with the radiation arms <NUM>.

The <NUM> antenna in the above embodiments, when in use, performs coupling feed on the radiation arms <NUM> by using the feeding baluns, so that it can be ensured that the radiation unit <NUM> can radiate signals with good radiation performance in a stable and reliable manner. Meanwhile, the first extension branches <NUM> and the second extension branches <NUM> which are disposed to be spaced apart from each other are disposed on respective radiation arms <NUM> of the radiation unit <NUM>, thus the first extension branches <NUM> and the second extension branches <NUM> can be utilized to adjust the electrical lengths of the high frequencies and low frequencies of the radiation unit <NUM>, thereby being able to achieve extension of the operating frequency band, achieve a very wide operating frequency band, and fulfil the use requirements of <NUM> antennas. The <NUM> antenna of the above embodiment, in the case of ultra-wideband being implemented, also has good impedance characteristics and cross-polarization ratio, and the production cost is low, which is suitable for the use requirements of <NUM> technology.

As shown in <FIG>, in one embodiment, the radiation unit <NUM> also include a substrate <NUM> which is provided between the radiation arms <NUM> and the feeding baluns, the radiation arms <NUM> being disposed on the surface of the substrate <NUM>.

As such, the radiation arms <NUM> can be disposed on the substrate <NUM> in form of patches, thus the volume of the radiation unit <NUM> can be reduced. The substrate <NUM> can be provided as a printed circuit board (PCB) media board.

As shown in <FIG>, based on the above embodiments, each of the feeding baluns includes a first feeding component <NUM> for the coupling feed with the first group of dipoles and a second feeding component <NUM> for the coupling feed with the second group of dipoles, the first feeding component <NUM> and the second feeding component <NUM> being disposed to have an angle therebetween. As such, the first feeding component <NUM> is utilized to perform feeding on the two radiation arms <NUM> of a group of dipoles, and the second feeding component <NUM> is utilized to perform feeding on the two radiation arms <NUM> of another group of dipoles, thus the transmission of energy can be achieved, and it can be ensured that the radiation unit <NUM> can radiate signals in a stable and reliable manner.

As shown in <FIG> and <FIG>, in one embodiment, the first feeding component <NUM> includes a first media <NUM>, a first feeding member and two first grounding members. The first feeding member is disposed on one side of the first media <NUM> by means such as engaging or bonding, the two first grounding members are disposed on the other side of the first media <NUM> by means such as engaging or bonding, and the two first grounding members are disposed to be spaced apart relative to each other. The first feeding member is coupled and connected with the two first grounding members, and the two first grounding members are connected with the two radiation arms <NUM> of the first group of dipoles in one-to-one correspondence. As such, the first feeding member is coupled and connected with each of the two first grounding members, and the two first grounding members are connected with the two radiation arms <NUM> of the first group of dipoles in one-to-one correspondence, thus the first feed can be utilized to perform coupling feed on the first group of dipoles, so that the radiation unit meets good impedance characteristics.

It should be noted that the first media <NUM> can be provided as a plate made of insulating materials. The first feeding member can be provided as a first balun microstrip line <NUM>, as shown in <FIG>. For example, the first balun microstrip line <NUM> includes a first branch <NUM> and a second branch <NUM> which are electrically connected, one end of the first branch <NUM> is electrically connected with an external feed network, and the second branch <NUM> has one end hanging in the air, and the first branch <NUM> and the second branch <NUM> are respectively disposed in correspondence with the two first grounding members and coupled and connected with them. As shown in <FIG>, the first grounding member can be provided as a first microstrip ground piece <NUM>, one end of the first microstrip ground piece <NUM> is electrically connected with a corresponding radiation arm <NUM> by means such as welding, and the other end of the first microstrip ground piece <NUM> is connected with ground base plate by means such as welding. The number of the first grounding members can be flexibly adjusted as required, as long as the coupling feed to the radiation arms <NUM> can be enabled.

As shown in <FIG> and <FIG>, in one embodiment, the second feeding component <NUM> includes a second media <NUM> disposed at an angle to the first media <NUM>, a second feeding member and two second grounding members. The second feeding member is disposed on one side of the second media <NUM> by means such as engaging or bonding, the second grounding member is disposed on the other side of the second media <NUM> by means such as engaging or bonding, and the two second grounding members are disposed to be spaced apart from each other. The second feeding member is coupled and connected with the two second grounding members, and the two second grounding members are connected with the two radiation arms <NUM> of second group of dipoles in one-to-one correspondence. As such, the second feeding member is coupled and connected with each of the two second grounding members, and the two second grounding members are connected with the two radiation arms <NUM> of second group of dipoles in one-to-one correspondence, thus the second feeding member can be utilized to perform coupling feed on second group of dipoles, so that the radiation unit meets good impedance characteristics.

It should be noted that second media <NUM> can be provided as a plate made of insulating materials. The second feeding member can be provided as a second balun microstrip line <NUM>, as shown in <FIG>. For example, the second balun microstrip line <NUM> includes a third branch <NUM> and a fourth branch <NUM> which are electrically connected, one end of the third branch <NUM> is electrically connected with an external feed network, and the fourth branch <NUM> has one end hanging in the air, and the third branch <NUM> and the fourth branch <NUM> are respectively disposed in correspondence with the two first grounding members and coupled and connected with them. As shown in <FIG>, the second feeding member can be provided as a second microstrip ground piece <NUM>, one end of the second microstrip ground piece <NUM> is electrically connected with a corresponding radiation arm <NUM> by means such as welding, and the other end of the second microstrip ground piece <NUM> is connected with ground base plate by means such as welding. The number of the two grounding members can be flexibly adjusted as required, as long as the coupling feed to the radiation arms <NUM> can be enabled.

The first media <NUM> and the second media <NUM> which are disposed to have an angle therebetween can be implemented by means of pluggable fitting, are easy for disassembly and assembly, and are of high assembling efficiency. Preferably, the first media <NUM> is disposed perpendicular to the second media <NUM> in a compact layout.

As shown in <FIG>, in one embodiment, the first media <NUM> is provided with a first socket <NUM>, and the second media <NUM> is provided with a second socket <NUM> which is disposed corresponding to the first socket <NUM>. In this way, the first media <NUM> is above the second media <NUM>, so that the second socket <NUM> corresponds to the first socket <NUM>, and then the second media <NUM> is inserted into the first socket <NUM> until the first media <NUM> is inserted into the second socket <NUM>, and then the first media <NUM> and the second media <NUM> can be stably and reliably connected together to form a support structure for providing stable support for the radiation unit <NUM>.

The width of the first socket <NUM> and the width of the second socket <NUM> can be flexibly adjusted according to the thicknesses of the second media <NUM> and the first media <NUM>.

As shown in <FIG> and <FIG>, in one embodiment, one end of the first grounding member is provided with a first bump <NUM> for pluggable fitting with a respective radiation arm <NUM>. As shown in <FIG> and <FIG>, one end of the second grounding member is provided with a second bump <NUM> for pluggable fitting with a respective radiation arm <NUM>. As such, a corresponding feeding socket <NUM> can be provided on a radiation arm <NUM> for plugging the first bump <NUM> and the second bump <NUM> into the feeding socket <NUM>, thus the electrical connection between the first grounding member and the second grounding member and the radiation arm <NUM> can be implement in a simple and convenient manner. Of course, in order to improve the stability and reliability of the pluggable fitting, as shown in <FIG>, the first media <NUM> may also be provided with a third bump <NUM> which is disposed corresponding to the first bump <NUM>; as shown in <FIG>, the second media <NUM> may also be provided with a fourth bump <NUM> which is disposed corresponding to the second bump <NUM>; thus the plugging strength of the first bump <NUM> and the second bump <NUM> are increased. Jacks corresponding to the feeding sockets <NUM> also need to be opened on the substrate <NUM>.

In one embodiment, the <NUM> antenna includes at least three radiation units <NUM> which are disposed to be equally spaced apart from each other in a preset distance. As such, three radiation units <NUM> are utilized to constitute a subarray, and the spacing between two adjacent radiation units <NUM> is preferably <NUM>. Further, four subarrays can constitute a <NUM> antenna array, and the spacing between adjacent subarrays is preferably <NUM>. Therefore, the sizes of the radiation units <NUM> can be adjusted according to actual frequency requirements to meet the different operating frequency requirements, and the radiation units <NUM> are used in combination to meet <NUM> antenna requirements, so that as compared with other array antennas, the pattern of the <NUM> array antenna are improved significantly and have good standing waves, as shown in <FIG>; the beam widths in the horizontal plane all reach <NUM>° or more, as shown in <FIG>.

The various technical features in the above embodiments may be combined arbitrarily. For brevity of description, not all possible combinations of various technical features in the above embodiments have been described. However, as long as the combinations of these technical features are not contradictory, they shall be regarded as falling within the scope of the specification.

The above embodiments represent only several embodiments of the present invention, which have been described concretely and in detail, but should not be construed as limiting the protection scope of the invention.

Claim 1:
A radiation unit (<NUM>), comprising:
two groups of dipoles the polarizations of which are orthogonal, each group of the dipoles comprises two radiation arms (<NUM>) which are disposed to be spaced apart relative to each other, and each of the radiation arms (<NUM>) is provided with a first extension branch (<NUM>) and a second extension branch (<NUM>) which are disposed to be spaced apart from each other;
wherein the surface area of the first extension branch (<NUM>) is greater than the surface area of the second extension branch (<NUM>);
wherein an outer sidewall of each of the radiation arms (<NUM>) is provided with a cut-off corner (<NUM>);
wherein each of the radiation arms (<NUM>) is provided with a first hollowed groove (<NUM>), each of one end of the first extension branch (<NUM>) and one end of the second extension branch (<NUM>) is connected with the outer sidewall of each of the radiation arms (<NUM>), a first spacer groove (<NUM>) in communication with the first hollowed groove (<NUM>) is provided between the first extension branch (<NUM>) and the second extension branch (<NUM>), and each of the first extension branch (<NUM>) and the second extension branch (<NUM>) is disposed towards the inside of the first hollowed groove (<NUM>);
wherein a second spacer groove (<NUM>) and a current-conducting part (<NUM>) for connecting two adjacent radiation arms (<NUM>) are provided between the two adjacent radiation arms (<NUM>), and each of the two adjacent radiation arms (<NUM>) is provided with a second hollowed groove (<NUM>) in communication with the second spacer groove (<NUM>).