Waveguide propagation apparatus compatible with hermetic packaging

This topic is related to a waveguide propagation apparatus, converting microstrip propagation to waveguide propagation, providing hermeticity on the mounting area, eliminating the cabling component causing degradation on the overall performance, involving at least a microwave module (2), and comprising a combination of a base part (3) and a cover part (4).

TECHNICAL FIELD

This invention is related to a waveguide propagation apparatus, mounted to a microwave module, converting microstrip propagation to waveguide propagation, and compatible with hermetic packaging.

BACKGROUND

In existing applications, microstrip propagation can be converted to waveguide propagation over the same mechanical part. The transition is provided by a printed-circuit board, of which a part outside of the waveguide is a microstrip line, whereas the part inside the waveguide is an inserted probe. However, hermeticity cannot be acquired unless a hermetic window is used at the opening of the waveguide because the transition between microstrip and waveguide propagations takes place on the same mechanical part. On the other hand, appending the hermetic window increases both complexity and cost of the structure.

In another application of the known technique, an adaption of the transition method between coaxial and waveguide propagations is stated. The coaxial connector of the structure and the microwave module are linked via a cabling component, hence, the transition between microstrip and waveguide propagations is achieved in a roundabout way. Despite the hermeticity that is attained at the module side, a degradation at the overall performance is inevitable because of the cabling component holding the connection between the transition structure and the microwave module. The cabling component causes an increment in a noise factor of the system when placed at the input of the microwave module, whereas a decrement in amplitude of the output power occurs when the cabling component is placed at the output.

In a known technique, a waveguide to microstrip transition module is mentioned in a United States patent document U.S. Pat. No. 5,202,648 (A). This module transmits electromagnetic energy received between the waveguide and the signal processing circuit. The module consists of a waveguide, a circuit panel and a microstrip line. The microstrip line directed by the waveguide is linked to the signal processing circuit. The system is covered hermetically to surround the circuit panel.

In another known technique, a waveguide system including a tuning element, an adaptor, a waveguide and pin link elements is mentioned in a United States patent document U.S. Pat. No. 6,549,106 (B2).

SUMMARY OF THE INVENTION

An objective of this invention is to provide a waveguide propagation apparatus, which is mounted to a microwave module having a coaxial connector.

Another objective of this invention is to provide a waveguide propagation apparatus, which is compatible with hermetic packaging.

Another objective of this invention is to provide a waveguide propagation apparatus, which converts microstrip propagation to waveguide propagation.

Another objective of this invention is to provide a waveguide propagation apparatus, which eliminates the cabling component causing degradation on the overall performance.

Components shown in the figures are enumerated one by one and the denotations of these numbers are given below:1. Waveguide propagation apparatus2. Microwave module2.1Conductive pin2.2Solder ring2.3. Solder ring hole2.4Module guiding pin2.5Connector mounting hole2.6First module mounting screw hole2.7First module guiding pin hole3. Base Part3.1Second module guiding pin hole3.2Second module mounting screw hole3.3Waveguide groove3.4Conductive pin bearing3.5. Conductive pin hole3.6welding hole3.7Apparatus guiding pin hole3.8Apparatus guiding pin3.9Apparatus mounting screw hole4. Cover Part4.1. Apparatus guiding pin hole4.2Apparatus mounting screw4.3Microwave tuning screw4.4Microwave tuning screw holeUR: The area of the solder ring holeUG: The area of the solder ring hole mounted with the solder ring

DETAILED DESCRIPTION OF THE INVENTION

Referring toFIGS. 1 to 7, a waveguide propagation apparatus (1), converting microstrip propagation to waveguide propagation, and eliminating the cabling component causing degradation on the overall performance, principally consists of,

at least a microwave module (2) transmitting/receiving RF signal,

at least a conductive pin (2.1), installed in the microwave module (2), linked to a microstrip line enabling electromagnetic propagation, and making signal transfer possible from/to the outer surface,

at least a solder ring (2.2), mounting the conductive pin (2.1) to the microwave module (2) by surrounding the conductive pin (2.1) when the at least a solder ring (2.2) is melted, and ensuring hermeticity of the mounting area, wherein the mounting area comprises at least a solder ring hole (2.3), the at least a solder ring hole (2.3) bears the solder ring (2.2), has a definite depth and a diameter larger than the diameter of the solder ring (2.2), and is located on the side wall of the microwave module (2),

at least a module guiding pin (2.4) configured to mount the microwave module (2) in a fixed manner,

at least a connector mounting hole (2.5) providing an attachment of a coaxial connector by a screw, the coaxial connector is used for validating the functionality of the microwave module (2) before the waveguide propagation apparatus (1) is mounted to the microwave module (2),

at least a first module mounting screw hole (2.6) located on the side wall of the microwave module and configured to accept a second screw,

at least a first module guiding pin hole (2.7), accepting the module guiding pin (2.4), and located on the side wall of the microwave module (2),

at least a base part (3), configured to provide electromagnetic propagation, and mounted to the microwave module (2),

at least a second module guiding pin hole (3.1) connected to the first module guiding pin hole (2.7) by accepting the module guiding pin (2.4) to make the alignment of the base part (3) with respect to the microwave module (2),

at least a second module mounting screw hole (3.2) connected to the first module mounting screw hole (2.6) by accepting a third screw to disable any movement of the base part (3) after being mounted to the microwave module (2),

at least a waveguide groove (3.3) aligned with the conductive pin (2.1) when the base part (3) is mounted to the microwave module (2),

at least a conductive pin bearing (3.4), located on the waveguide groove (3.3), and close to the microwave module (2) to maintain the conductive pin (2.1) when the base part (3) is mounted to the microwave module (2),

at least a conductive pin hole (3.5) accepting the conductive pin (2.1),

at least a welding hole (3.6) located on the top of the conductive pin bearing to improve the electrical conductivity by welding after the conductive pin (2.1) is inserted into the conductive pin hole (3.5),

at least a first apparatus guiding pin hole (3.7) located on the upper surface of the base part (3) and the upper surface of the base part (3) intersecting the waveguide groove (3.3),

at least an apparatus guiding pin (3.8) accepted by the first apparatus guiding pin hole (3.7) to make necessary alignments,

at least an apparatus mounting screw hole (3.9) located on the upper surface of the base part (3) and close to the waveguide groove (3.3),

at least a cover part (4) mounted on the base part (3) to constitute the top side of the waveguide groove (3.3),

at least a second apparatus guiding pin hole (4.1) concentric with the first apparatus guiding pin hole (3.7) to make the alignment of the cover part (4) with respect to the base part (3) by accepting the apparatus guiding pin (3.8),

at least an apparatus mounting screw (4.2) uniting the base part (3) and the cover part (4) by screwing into the apparatus mounting screw hole (3.9),

at least a microwave tuning screw (4.3) minimizing the return and insertion losses of the signal transmitted/received by the conductive pin (2.1),

at least a microwave tuning screw hole (4.4), accepting the microwave tuning screw (4.3), and located on the upper surface of the cover part (4).

In an application of this invention, the conductive pin (2.1) is installed on one of the side walls of the microwave module (2), the microwave module (2) is capable of transmitting/receiving RF signal. The conductive pin (2.1) is linked to a microstrip line which is located in the microwave module (2) and is enabling electromagnetic propagation; hence, the conductive pin (2.1) makes signal transfer possible from/to the outer surface. The conductive pin (2.1) is mounted to the microwave module (2) by the solder ring (2.2) which performs this action by surrounding the conductive pin (2.1) when it is melted; moreover, the mentioned action ensures hermeticity with the microwave module (2) on the mounting area. At the time of the mounting of the conductive pin (2.1), the solder ring (2.2) is held in the solder ring hole (2.3) located on the side wall of the microwave module (2). The solder ring hole (2.3) has a definite depth and a diameter larger than the diameter of the solder ring (2.2). The solder ring (2.2) is heated, and then, melted to fix and position the conductive pin (2.1) by surrounding it. After that, the base part (3) is mounted to the microwave module (2). For this process, the conductive pin (2.1) is accepted by the conductive pin hole (3.5) while the module guiding pin (2.4) passes through the second module guiding pin hole (3.1) and falls into the first module guiding pin hole (2.7). Notice that, the alignment of the base part (3) is procured by inserting the module guiding pin (2.4) into the first module guiding pin hole (2.7). Afterwards, the electrical conductivity between the conductive pin (2.1) and the conductive pin bearing (3.4) is improved by soldering into the welding hole (3.6) of the conductive pin bearing (3.4). In order to finish the mounting to the microwave module (2), the base part (3) is screwed into the first module mounting screw hole (2.6). Furthermore, the cover part (4) is aligned with respect to the base part (3) by the apparatus guiding pin (3.8). Then, the base part (3) and the cover part (4) are connected with each other by the apparatus mounting screw (4.2). The microwave tuning screw (4.3) minimizes the return and insertion losses of the signal transmitted/received by the conductive pin (2.1).

In another application of this invention, at least a coaxial connector can be attached to the microwave module (2) by screwing into the connector mounting hole (2.5) on the side wall of the microwave module (2). Therefore, the functionality of the microwave module (2) is validated before the mounting of the waveguide propagation apparatus (1) to the microwave module (2).

The above are exemplary applications of carrying out this invention, a waveguide propagation apparatus (1) compatible with hermetic packaging. It is to be understood that the invention is not limited to the embodiments stated above, however, corresponding modifications and variations are within the scope of the following claims.