Patent Publication Number: US-11043744-B2

Title: Antenna oscillator and planar antenna

Description:
CROSS REFERENCE TO RELATED APPLICATION 
     This application claims priority to Chinese Patent Application No. CN201921600215.1 filed on filed on Sep. 23, 2019, the entire disclosure of which is incorporated herein by reference in its entirety. 
     TECHNICAL FIELD 
     The disclosure relates to the field of antenna technology, in particular, to an antenna oscillator and a planar antenna. 
     BACKGROUND 
     The technology of planar antennas is becoming mature. Due to its small size, light weight, small wind resistance and convenient installation and use, the planar antenna based on the flaky antenna oscillator is widely used in many fields. As the planar antenna is more efficient, it is especially suitable for the reception of live satellite TV signals, which is very popular among consumers. 
     With the popularity of digital TV, consumers have raised higher requirements for the design of wireless band antenna for digital TV. Traditional antenna oscillators have defects in both the effective bandwidth that can be achieved and the stability of signal reception. 
     SUMMARY 
     The purpose of the disclosure is to provide an antenna oscillator, which aims to solve the technical problem that the traditional antenna oscillator has a small effective bandwidth range and poor signal stability. 
     The present disclosure is realized by the antenna oscillator, which has a plate-like structure, including a first resonance part and a second resonance part. The first resonance part and the second resonance part are provided with a first resonance window and a second resonance window, respectively. The first resonance window has a different effective size from the second resonance window, the antenna oscillator is further provided with a connecting slit, and the connecting slit is connected to the first resonance window and the second resonance window. Both sides of the connecting slit are provided with a feed port. 
     In an embodiment of the disclosure, the shape of the first resonance window is adapted to the shape of the first resonance part and the shape of the second resonance window is adapted to the shape of the second resonance part. 
     In an embodiment of the present disclosure, the first resonance part includes a vertical plate, a first horizontal plate, a second horizontal plate, a first slanting plate and a second slanting plate; the first horizontal plate and the second horizontal plate are connected to an upper end and a lower end of the same side of the vertical plate, respectively; the first slanting plate and the second slanting plate are connected to the first horizontal plate and the second horizontal plate, respectively; the first slanting plate and the second slanting plate extend toward each other and the end thereof is connected to the second resonance part; the second resonance part has a rectangular shape, the second resonance window has an elongated rectangular shape; the connecting slit is connected to a middle portion of a long side of the rectangular structure of the second resonance window and the first resonance window; the antenna oscillator has a symmetrical structure. 
     In an embodiment of the disclosure, the antenna oscillator is further provided with a mounting hole. 
     In an embodiment of the disclosure, the first resonance part and the second resonance part are made in one piece by a metal material. 
     In an embodiment of the disclosure, the antenna oscillator is made of aluminum or iron. 
     The present disclosure also provides a planar antenna, including a first antenna oscillator and a second antenna oscillator, wherein the first antenna oscillator and the second antenna oscillator are respectively the antenna oscillator as described above. The planar antenna further comprises a connector. The feed ports of the first antenna oscillator and the second antenna oscillator are configured for feed connection through the connector. 
     In an embodiment of the present disclosure, the first antenna oscillator and the second antenna oscillator are at the same plane and the second resonance part of the first antenna oscillator extends toward the second resonance part of the second antenna oscillator. The connector includes a first connector and a second connector, symmetrically arranged in parallel. The first connector is connected to one feed port of the first antenna oscillator and one feed port of the second antenna oscillator; the second connector is connected to another feed port of the first antenna oscillator and another feed port of the second antenna oscillator. 
     In an embodiment of the present disclosure, the first connector and the second connector are each in a strip-like structure, wherein the middle portion is provided with an impedance tuning structure. 
     In an embodiment of the present disclosure, the first connector and the second connector are each provided with a fixing hole for fixing the spacing distance between the first connector and the second connector. 
     An antenna oscillator and a planar antenna of the present disclosure have at least the following beneficial effects:
         the first resonance window and the second resonance window having different effective sizes are provided in the first resonance part and the second resonance part connected to each other and the connecting slit is connected to the first resonance window and the second resonance window, so that the antenna oscillator can resonate at two different frequency points and thereby expand the effective bandwidth of the antenna oscillator. Furthermore, the antenna oscillator has better responsiveness to each frequency in the effective bandwidth and improves the stability when receiving and transmitting various frequency signals within the effective bandwidth.       

    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       In order to illustrate the technical protocols in the embodiments of the present disclosure more clearly, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present disclosure. To an ordinary person in this art, other drawings may also be obtained based on these drawings before they devote inventive work. 
         FIG. 1  shows a schematic structural diagram of an antenna oscillator according to an embodiment of the present disclosure; 
         FIG. 2  shows a schematic structural diagram of a planar antenna according to an embodiment of the present disclosure; 
         FIG. 3  shows a partial enlarged diagram of the portion A of  FIG. 2 ; 
         FIG. 4  shows a diagram of a reflection loss of a planar antenna according to an embodiment of the present disclosure; 
         FIG. 5  shows a diagram of gain test result of a planar antenna according to an embodiment of the present disclosure. 
     
    
    
     The references in the above figures are as follows in detail: 
       1 —antenna oscillator;  101 —the first antenna oscillator;  102 —the second antenna oscillator;  11 —the first resonance part;  110 —the first resonance window;  111 —vertical plate;  112 —the first horizontal plate;  113 —the second horizontal Plate;  114 —the second slanting plate;  115 —the first slanting plate;  12 —the second resonance portion;  120 —the second resonance window;  121 —connecting slit;  13 —feed port;  14 —mounting hole;  2 —connector;  201 —the first connector;  202 —the second connector;  21 —impedance tuning structure;  22 —fixing hole. 
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     In order to make the objects, technical protocols and advantages of the present disclosure more comprehensible, the present disclosure will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the disclosure and are not intended to limit the disclosure. 
     It should be noted that when a component is referred to as being “fixed” or “provided” to another component, it can be directly or indirectly located on the “another component”. When a component is referred to as being “connected” to another component, it can be directly or indirectly connected to the other component. The terms “up”, “down”, “left”, “right”, “front”, “back”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, etc. indicate that the orientation or position is based on the orientation or position shown in the drawings and is merely for convenience of description but not to be construed as technical protocols limitation. The terms “first” and “second” are used for convenience of description only and are not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features. “A plurality of” means two or more, unless specifically defined otherwise. 
     In order to explain the technical protocols of the present disclosure, the following detailed description will be made in connection with the specific drawings and embodiments. 
     According to  FIG. 1 , an embodiment of the present disclosure provides an antenna oscillator  1  having a plate-like structure, which includes a first resonance part  11  and a second resonance part  12  connected to the first resonance part  11 . The first resonance part  11  and the second resonance part  12  are provided with a first resonance window  110  and a second resonance window  120 , respectively. The first resonance window  110  has different effective size from the second resonance window  120 . The antenna oscillator  1  is further provided with a connecting slit  121  for connection. The connecting slit  121  is connected to the first resonance window  110  and the second resonance window  120  and both sides of the connecting slit  121  are provided with a feed port  13 . 
     The first resonance window and the second resonance window having different effective sizes are provided in the first resonance part and the second resonance part which are connected to each other and the first resonance window and the second resonance window are connected through the connecting slit. By this means, the antenna oscillator  1  provided by the embodiment of the present disclosure render the antenna oscillator resonate at two different frequency points, thereby expanding the effective bandwidth of the antenna oscillator. Furthermore, the antenna oscillator has better responsiveness to each frequency in the effective bandwidth and it improves the stability when receiving and transmitting various frequency signals within the effective bandwidth. 
     In an embodiment of the present disclosure according to  FIG. 1 , the shape of the first resonance window  110  is adapted to the shape of the first resonance part  11  and the shape of the second resonance window  120  is adapted to the shape of the second resonance part  12 . Such settings can improve the anti-deformation ability of the antenna oscillator and avoid deformation caused by an external force to affect its normal performance. 
     In an embodiment of the present disclosure according to  FIG. 1 , the first resonance part  11  includes a vertical plate  111 , the first horizontal plate  112  and the second horizontal plate  113  are connected to an upper end and a lower end of the same side of the vertical plate  111 , respectively. The first slanting plate  115  and the second slanting plate  114  are connected to the first horizontal plate  112  and the second horizontal plate  113 , respectively. The first slanting plate  115  and the second slanting plate  114  extend toward each other and the end thereof is connected to the second resonance part  12 ; the second resonance part  12  has a rectangular shape, the second resonance window  120  has an elongated rectangular shape and the connecting slit  121  is connected to a middle portion of a long side of the rectangular structure of the second resonance window  120  and the first resonance window  110 . The antenna oscillator  1  has a symmetrical structure. 
     The first resonance window  110  has a pentagonal structure in which a rectangular shape and an isosceles triangle are spliced and the second resonance window  120  has a rectangular structure. The effective dimensions of the first resonance window  110  and the second resonance window  120  are different. Resonance occurs at two different frequencies, thereby expanding the effective bandwidth; the impedance of the antenna oscillator  1  is adjusted by changing the width of the second resonance window  120 ; the antenna oscillator  1  has a symmetrical structure as a whole, which makes the antenna oscillator  1  more aesthetically beautiful, and easier to manufacture. In the assembly process, it is not necessary to distinguish the upper and lower sides of the antenna oscillator  1 . Even if the antenna oscillator  1  is turned upside down and installed, the function of transmitting and receiving signals can be realized, thereby simplifying the assembly work of the antenna device. 
     In an embodiment of the present disclosure according to  FIG. 1 , the antenna oscillator  1  has a thickness of 0.4-0.5 mm, the first horizontal plate  112  is spaced apart from the second horizontal plate  113  by 140-150 mm, the vertical plate  111  is separated from the joint of the first slanting plate  115  and the first horizontal plate  112  by 50-60 mm and separated from the end of the first slanting plate  115  by 90-100 mm, the connecting slit  121  has a length of 75-80 mm and a width of 10-15 mm. The second resonance window  120  has a length of 160-170 mm and a width of 10-15 mm. 
     As a specific embodiment of the present disclosure according to  FIG. 1 , the antenna oscillator  1  has thickness of 0.5 mm, the first horizontal plate  112  and the second horizontal plate  113  are spaced by 146 mm, the vertical plate  111  is spaced from the joint of the first slanting plate  115  and the first horizontal plate  112  by 57.92 mm and spaced from the end of the first slanting plate  115  by 91.5 mm, the connecting slit  121  has a length of 76 mm and a width of 10 mm, the second resonance window  120  a length of 170 mm and a width of 12 mm. Two antenna oscillators  1  as described above are arranged oppositely, and a wide range of effective bandwidth can be obtained after the feed ports  13  are configured for feed connection through the connector  2 . Preferably, the impedance of the connector  2  in the present embodiment is close to 75Ω. Referring to  FIG. 2 ,  FIG. 4  and  FIG. 5 , the reflection loss curve of the planar antenna of  FIG. 2  is shown in  FIG. 4 . It can be seen that the planar antenna can resonate in the frequency bands of 485 Mhz and 555 Mhz and the output impedance of the antenna has good matching with the output coaxial line impedance and has a high antenna efficiency. The gain test results of the planar antenna at each frequency are shown in  FIG. 5 . It can be seen that the antenna oscillator  1  has a wide range of effective bandwidth and the gain waveform is flat. The frequency bandwidth received by the antenna is wide and stable. The excellent gain index can be achieved at each frequency in the ultra-high frequency band. 
     In an embodiment of the present disclosure according to  FIG. 1 , the antenna oscillator  1  is further provided with a mounting hole  14  for mounting the antenna oscillator  1  on the outer housing or the substrate to prevent the antenna oscillator  1  from being deformed by force and can maintain the inherent shape of the antenna oscillator  1 , thus avoids the influence on its performance and normal use by the deformation of the antenna oscillator  1  under external force. 
     In an embodiment of the present disclosure, the first resonance part  11  and the second resonance part  12  are made in one piece by a metal material, such as aluminum or iron, which ensures the resonance performance of the antenna oscillator  1 , enhances the structural strength of the antenna oscillator  1  and reduces the manufacturing cost of the antenna oscillator  1 . As a preferred embodiment of the disclosure, the antenna oscillator  1  may be made of tinplate. 
     In an embodiment of the present disclosure according to  FIG. 2 , the planar antenna includes a first antenna oscillator  101  and a second antenna oscillator  102 . The first antenna oscillator  101  and the second antenna oscillator  102  are as described above for the antenna oscillator  1 . The planar antenna also includes a connector  2  through which the feed ports  13  of the first antenna oscillator  101  and the second antenna oscillator  102  are configured for feed connection. 
     In an embodiment of the present disclosure according to  FIG. 2 , the first antenna oscillator  101  and the second antenna oscillator  102  are in the same plane, the second resonance part  12  of the first antenna oscillator  101  extend toward the second resonance part  12  of the second antenna oscillator  102 , the connector  2  includes a first connector  201  and a second connector  202  which are symmetrically arranged in parallel, the first antenna oscillator  101  and the second antenna oscillator  102  are provided with a feed port  13  on each side of the connecting slit  121  thereof, respectively. The first connector  201  is connected to one feed port  13  of the first antenna oscillator  101  and one feed port  13  on the same side of the second antenna oscillator  102 , the second connector  202  is connected to another feed port  13  of the first antenna oscillator  101  and another feed port  13  of the second antenna oscillator  102 . As such the first antenna oscillator  101  and the second antenna oscillator  102  form a symmetric oscillator antenna, the first connector  201  and the second connector  202  are placed in parallel and close to each other. The middle position of symmetric antenna oscillator is the signal output feeding point which guides the received signal to the amplifier or directly transmits the received signal to the user terminal. 
     In an embodiment of the present disclosure according to  FIG. 3 , the first connector  201  and the second connector  202  are each in a strip-like structure and wherein the middle portion is provided with an impedance tuning structure  21 . The spacing between the first connector  201  and the second connector  202  directly affects the coupling capacitance of the feed. The size of the coupling capacitor affects the output impedance of the antenna. Therefore, the spacing of the first connector  201  and the first connector  201  can be adjusted by setting the impedance tuning structure  21 , thereby the coupling capacitance is changed. Furthermore, tune the output reflection index of the planar antenna finely, so that the output impedance of the planar antenna is as close as possible to 75Ω or 50Ω. 
     In an embodiment of the present disclosure according to  FIG. 3 , the first connector  201  and the second connector  202  are both provided with fixing hole  22  for fixing the spacing distance of the first connector  201  and the second connector  202 . In order to prevent the spacing of the first connector  201  and the second connector  202  from changing under the action of its own gravity or external force, thereby affecting the coupling capacitance of the feed and the output impedance of the antenna, in this embodiment, the middle position of the connector  2  is provided with a fixing hole  22  for further reinforcing the structure of the planar antenna. Furthermore, the planar antenna can be fixed on the supporting structure through the fixing hole  22 , or the distance of the first connector  201  and the second connector  202  can be fixed only by one fixing structure. 
     It should be noted that the antenna oscillator  1  and the planar antenna according to the embodiments of the present disclosure can be applied to a television signal receiving antenna. In particular, the antenna oscillator  1  and the planar antenna according to the embodiments of the present disclosure have a better gain and reflection performance in the Ultra high frequency full band, which can be applied to digital TV signal receiving antennas. 
     The above is only an alternative embodiment of the present disclosure, and is not intended to limit the present disclosure. Any modifications, equivalent replacements or/and improvements made within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure.