阅读说明：本技术 一种脊波导到同轴过渡的结构 (Ridge waveguide-to-coaxial transition structure ) 是由 张勇 汪涵 余彩云 王莉 于 2020-05-18 设计创作，主要内容包括：本发明公开了一种脊波导到同轴过渡的结构,包括上腔体、下腔体、上盖,以及置于上腔体和下腔体内的单脊波导组件和同轴传输组件,上腔体和下腔体将单脊波导组件封装在内,单脊波导组件包括感性的金属脊和容性的金属板,通过采用单脊波导电路结构再在波导的短路面的1/4波长处连接同轴传输组件,信号能量通过单脊波导传播,并通过金属脊与同轴传输组件的交汇处,最后实现波导到同轴传输组件的过渡传输,该结构可以做各种功率合成的波导到同轴的转换结构；这种新型单脊波导到同轴的过度结构与传统的波导到同轴结构相比,拥有结构紧凑、插入损耗低、频段宽等特点,且本发明的结构简单,易于实现,在多个波段功率合成中具有良好的应用前景。(The invention discloses a structure for transition from ridge waveguide to coaxial, which comprises an upper cavity, a lower cavity, an upper cover, a single ridge waveguide component and a coaxial transmission component, wherein the single ridge waveguide component and the coaxial transmission component are arranged in the upper cavity and the lower cavity; compared with the traditional waveguide-to-coaxial structure, the novel transition structure from single-ridge waveguide to coaxial has the characteristics of compact structure, low insertion loss, wide frequency band and the like, and the novel transition structure from single-ridge waveguide to coaxial has a simple structure, is easy to realize, and has a good application prospect in power synthesis of multiple wave bands.)

1. The utility model provides a structure of ridge waveguide to coaxial transition, its characterized in that, includes cavity, lower cavity, upper cover to and arrange in single ridge waveguide subassembly and the coaxial transmission subassembly of cavity and lower cavity in, it is closed and sealed that cavity and lower cavity match each other to go up the cavity, forms complete waveguide structure, single ridge waveguide subassembly is including the metal spine of sensitivity and the metal sheet of capacitive, the one end of metal spine is the output for the top of input and coaxial transmission subassembly, the metal sheet is connected at the other end of metal spine and is resisted the matching with the wide band of metal spine, the top at metal spine and metal sheet junction is connected to coaxial transmission subassembly, the top at coaxial transmission subassembly is connected to the upper cover.

2. The structure for transition from a ridge waveguide to a coaxial transmission component as claimed in claim 1, wherein in the structure for transition from the metal ridge to the coaxial transmission component, the wave of the ridge waveguide propagates in the gap between the metal ridge and the other boundary of the ridge waveguide, and the connection position of the coaxial transmission component is at 1/4 wavelength before the short-circuit surface of the waveguide.

3. The ridge waveguide-to-coaxial transition structure of claim 2, wherein a wave propagating in the ridge waveguide is converted from a main mode TE10 mode in the metal ridge to a TEM mode in the coaxial transmission component from the metal ridge to the coaxial transmission component, so that a single-mode operating frequency bandwidth of the ridge waveguide is converted into an octave bandwidth.

4. The ridge waveguide-to-coaxial transition structure of claim 1, wherein the top end of the coaxial transmission component is rod-shaped, the bottom end of the coaxial transmission component is cylindrical, and a cylinder with different coaxial diameters is arranged at the top of the cylinder, so that a plurality of steps are formed in the circumferential direction of the coaxial transmission component.

5. The structure of claim 4, wherein the thickness of the metal plate is smaller than that of the metal ridge, the metal plate is in a shape of a truncated triangular prism, one end of the truncated corner of the metal plate is connected with the metal ridge, and the other two corners of the triangular prism structure of the metal plate face to two sides of the metal ridge.

6. The structure for transition from a ridge waveguide to a coaxial line as claimed in claim 5, wherein the upper cavity is provided with a jack matched with the coaxial transmission component, after the top end of the coaxial transmission component passes through the jack, the coaxial transmission component is hermetically encapsulated by the upper cover, and the metal ridge and the metal plate are sealed by the upper cavity and the lower cavity, so that the single ridge waveguide forms a closed waveguide to reduce energy leakage.

7. The structure of claim 6, wherein the upper cavity is connected to the top of the lower cavity, and the bottom of the upper cavity and the top of the lower cavity at the connection are respectively configured to be smooth surfaces, so that the upper cavity and the lower cavity form a tight shielding cavity, and the inner walls of the upper cavity and the lower cavity are smooth surfaces to reduce the power loss of the ridge waveguide.

8. The ridge waveguide to coaxial transition structure of claim 5, wherein the metal ridge and the metal plate are integrally formed, and the bottom end of the coaxial transmission component is in threaded matching connection with the metal ridge and the metal plate.

Technical Field

The invention relates to the technical field of microwave transmission transition structures, in particular to a structure for transition from ridge waveguide to coaxial.

Background

Microwaves have great significance in communication, radar, guidance, remote sensing technology, radio astronomy and wave spectroscopy. In recent years, with the rapid development of modern communication systems, the performance requirements for microwave transmission systems have increased. The transceiver front end is taken as an important research object in a communication system, and the improvement of the power of the transceiver front end can enable the communication system to have better performance in three aspects of interference resistance, action distance and communication quality. How to provide stable high-power microwaves for the microwave oven is always an important issue in the research field.

The solid-state power device is one of the most commonly used power devices in engineering, and has the advantages of easiness in installation, integration, maintenance and the like. Meanwhile, the working voltage is lower, and the device is more reliable in service life and stability compared with an electric vacuum device. However, compared to the output power requirements of tens and even hundreds of watts at the transmitter, the existing semiconductor materials and manufacturing processes limit the output power and conversion efficiency of a single solid-state chip, and severely restrict the development of communication systems. Therefore, researchers are exploring and researching new semiconductor materials and processing technologies to increase the output power of a single power device. On the other hand, the output power of a plurality of amplifiers is superimposed and combined by using a power combining technique to improve the output capability. At present, the research on the broadband efficient power synthesis technology becomes a hot problem in the research field of millimeter waves and submillimeter waves.

The problem that the existing power synthesis structure is large in size is solved by replacing a rectangular waveguide with a ridge waveguide, and the power synthesis structure is of a coaxial radial synthesis structure, but transition from the ridge waveguide to the coaxial waveguide is not effectively solved.

Disclosure of Invention

The invention aims to provide a structure for transition from ridge waveguide to coaxial, which aims at the problems and provides a structure for transition from single ridge waveguide to coaxial, which has the characteristics of small volume, wide frequency band, easy realization and the like and has good application prospect in a microwave power combiner.

The embodiment of the invention is realized by the following steps:

the utility model provides a structure of ridge waveguide to coaxial transition, it includes the upper chamber body, lower cavity, the upper cover, and arrange single ridge waveguide subassembly and the coaxial transmission subassembly in upper chamber body and lower cavity in, it matches each other closed and sealed to go up cavity and lower cavity, form complete waveguide structure, single ridge waveguide subassembly is including the metal spine of sensitivity and the metal sheet of capacitive, the one end of metal spine is the output for the top of input and coaxial transmission subassembly, the metal sheet is connected at the other end of metal spine and is resisted the matching with the wide band stop of metal spine, the top at metal spine and metal sheet junction is connected to the coaxial transmission subassembly, the top at the coaxial transmission subassembly is connected to the upper cover.

In the preferred embodiment of the present invention, the structure of the transition from the metal ridge to the coaxial transmission component is such that the wave of the ridge waveguide propagates in the gap between the metal ridge and the other boundary of the ridge waveguide, and the connection position of the coaxial transmission component is at 1/4 wavelength before the short-circuit surface of the waveguide.

In the preferred embodiment of the present invention, when a wave propagates in the ridge waveguide, the wave is converted from the TE10 mode, which is the main mode in the metal ridge, to the TEM mode in the coaxial transmission component from the metal ridge to the coaxial transmission component, so that the single-mode operating frequency bandwidth of the ridge waveguide is converted into the octave bandwidth.

In a preferred embodiment of the present invention, the top end of the coaxial transmission assembly is rod-shaped, the bottom end of the coaxial transmission assembly is cylindrical, and a cylinder with coaxial unequal diameters is disposed at the top of the cylinder, so that a plurality of steps are formed in the circumferential direction of the coaxial transmission assembly.

In a preferred embodiment of the present invention, the metal plate has a thickness smaller than that of the metal ridge, the metal plate is in a shape of a truncated triangular prism, one end of the truncated corner of the metal plate is connected to the metal ridge, and the other two corners of the triangular prism of the metal plate face to two sides of the metal ridge.

In a preferred embodiment of the present invention, the upper cavity is provided with a jack matched with the coaxial transmission assembly, after the top end of the coaxial transmission assembly passes through the jack, the upper cover hermetically encapsulates the coaxial transmission assembly, and the metal ridge and the metal plate are sealed by the upper cavity and the lower cavity, so that the single-ridge waveguide forms a closed waveguide to reduce energy leakage.

In a preferred embodiment of the present invention, the upper cavity is connected to the top of the lower cavity, and the bottom of the upper cavity and the top of the lower cavity at the connection are respectively provided with a flat smooth surface, so that the upper cavity and the lower cavity form a tight shielding cavity, and the inner walls of the upper cavity and the lower cavity are flat smooth surfaces, so as to reduce the power loss of the ridge waveguide.

In a preferred embodiment of the present invention, the metal ridge and the metal plate are integrally formed, and the bottom end of the coaxial transmission assembly is in threaded matching connection with the metal ridge and the metal plate.

The invention has the beneficial effects that:

according to the invention, the metal ridge is used as the single ridge waveguide and is also used as the input port, the coaxial transmission assembly is used as the output port, so that the wave energy is transmitted from the metal ridge to the coaxial transmission assembly to complete a transition, the energy is transmitted from the single ridge waveguide to the intersection of the coaxial transmission assembly and the ridge waveguide, then the conversion mode is from the TE10 mode to the TEM mode, and then the wave energy is transmitted in the coaxial transmission assembly; the structure has the characteristics that the rectangular waveguide does not have, can be applied and tested in the practice of single-ridge waveguide, realizes the conversion of coaxial-ridge waveguide, is convenient to use, can be widely applied to a broadband waveguide system, and has great practical value.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope.

FIG. 1 is a perspective view of a ridge waveguide to coaxial transition structure of the present invention;

FIG. 2 is a perspective view of a single ridge waveguide assembly and coaxial transmission assembly of the present invention;

FIG. 3 is a top perspective view of a ridge waveguide to coaxial transition structure of the present invention;

FIG. 4 is a side perspective view of a ridge waveguide to coaxial transition structure of the present invention;

FIG. 5 is a graph of structural return loss simulation for a ridge waveguide to coaxial transition in accordance with the present invention;

FIG. 6 is a graph of a structural transmission loss simulation for a ridge waveguide to coaxial transition in accordance with the present invention;

icon: 1-an upper cavity; 2-lower cavity; 3-covering the cover; 4-a metal ridge; 5-a metal plate; 6-coaxial transmission component.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

First embodiment

Referring to fig. 1, the present embodiment provides a structure for transition from a ridge waveguide to a coaxial line, which includes an upper cavity 1, a lower cavity 2, an upper cover 3, and a single ridge waveguide assembly and a coaxial transmission assembly 6 disposed in the upper cavity 1 and the lower cavity 2, wherein the upper cavity 1 and the lower cavity 2 enclose the single ridge waveguide assembly, the upper cover 3 encloses the coaxial transmission assembly 6 at the top of the upper cavity 1, the single ridge waveguide assembly includes a sensitive metal ridge 4 and a capacitive metal plate 5, and the structure realizes transmission of waves in different transmission lines through a transmission structure for transition from the single ridge waveguide assembly to the coaxial transmission assembly 6.

The upper cavity 1 and the lower cavity 2 are matched, closed and sealed with each other to form a complete waveguide structure, the integral thickness of the upper cavity 1 and the lower cavity 2 is 1.27mm, the integral length is 3.5mm, the upper cavity 1 and the lower cavity 2 are symmetrical about the central line of the integral structure, the upper cavity 1 is connected with the top of the lower cavity 2, the bottom of the upper cavity 1 and the top of the lower cavity 2 at the joint are respectively provided with a flat smooth surface, so that the upper cavity 1 and the lower cavity 2 form a tight shielding cavity, the bottom surface of the upper cavity 1 and the top surface of the lower cavity 2 are respectively provided with a cavity space which is inwards concave, the inner walls of the cavity spaces of the upper cavity 1 and the lower cavity 2 are flat smooth surfaces, the bottom ends of the single ridge waveguide component and the coaxial transmission component 6 are packaged in the cavity, the arrangement is used for reducing the power loss of the ridge waveguide, and the four corners of the upper cavity 1 and the lower cavity 2 are respectively provided with threaded holes with opposite positions, the threaded holes respectively communicate the top and bottom surfaces of the upper cavity 1 and the lower cavity 2, and the upper cavity 1 and the lower cavity 2 are tightly fixed by using screws to penetrate through the threaded holes; go up cavity 1 and lower cavity 2 and connect and encapsulate metal spine 4 and metal sheet 5 including, the length of the last cavity 1 of encapsulation metal spine 4 part and lower cavity 2 is 3.5mm, and the width is 1.8mm, and the length of the last cavity 1 of encapsulation metal sheet 5 part and lower cavity 2 is 2mm, and the width is 3.5 mm.

Referring to fig. 2, the metal ridge 4 and the metal plate 5 are integrally formed, one end of the metal ridge 4 is an input end, the top end of the coaxial transmission component 6 is an output end, the end of the metal ridge 4 is located on the end surface of the upper cavity 1, the metal plate 5 is connected to the other end of the metal ridge 4 and is impedance-matched with the metal ridge 4 in a broadband manner, the thickness of the metal plate 5 is smaller than that of the metal ridge 4, the metal plate 5 is in a truncated triangular prism shape, one end of the metal plate 5 with a truncated corner is connected with the metal ridge 4, the other two corners of the triangular prism structure of the metal plate 5 face to the two sides of the metal ridge 4, the degree of the two corners is 57 degrees, the length of the metal ridge 4 is 3.5mm, the width of the metal ridge is 1.1mm, the thickness of the metal ridge 4 is in a rectangular shape as a whole, a threaded hole and a thread for connecting the bottom end of the coaxial transmission component 6 are concavely arranged at the top of the, the width of the other end of the metal plate is 2.8mm, the thickness of the metal plate 5 is 0.6mm, and a threaded hole matched with the bottom end of the coaxial transmission assembly 6 is formed in the top of one end, connected with the metal ridge 4, of the metal plate 5, so that the bottom end of the coaxial transmission assembly 6 is connected to the top of the joint of the metal ridge 4 and the metal plate 5 through threads; the transition structure from the metal ridge 4 to the coaxial transmission component 6 is characterized in that the wave of the ridge waveguide propagates in the gap between the metal ridge 4 and the other boundary of the ridge waveguide, the connection position of the coaxial transmission component 6 is at 1/4 wavelengths in front of the short-circuit surface of the waveguide, the arrangement is such that when the wave propagates in the ridge waveguide, the main mode TE10 mode in the metal ridge 4 is converted into the TEM mode in the coaxial transmission component 6 from the metal ridge 4 to the coaxial transmission component 6, so that the single-mode operating frequency bandwidth of the ridge waveguide is converted into the octave bandwidth, and the characteristic of the ridge waveguide is not possessed by the rectangular waveguide.

Referring to fig. 3 and 4, the top end of the coaxial transmission assembly 6 is rod-shaped, the bottom end of the coaxial transmission assembly 6 is cylindrical, and a cylinder with different coaxial diameters is arranged on the top of the cylinder, so that a first-level step is formed in the circumferential direction of the coaxial transmission assembly 6, the height of the coaxial transmission assembly 6 is 1.625mm, the diameter of the top end of the coaxial transmission assembly 6 is 0.2mm, the diameter of the bottom of the coaxial transmission assembly is 0.5mm, the diameter of the coaxial cylinder at the first-level step at the bottom end of the coaxial transmission assembly 6 is 0.4mm and the height of the coaxial cylinder is 0.1mm, the structure of the bottom end of the coaxial transmission assembly 6 is matched with the upper cavity 1, the bottom end of the coaxial transmission assembly 6 of the present embodiment is an SMA joint or a TNC joint, which is selected according to actual use and test conditions, the coaxial transmission assembly 6 is connected to the top of the joint of the metal ridge 4, enabling transmission of waves from within the metallic ridge 4 into the coaxial transmission assembly 6; go up cavity 1 and be provided with the jack with 6 bottom matched with of coaxial transmission subassembly, its shape just in time laminates, and the 1 inner wall of last cavity of laminating department is for leveling the smooth surface, after the jack was passed on coaxial transmission subassembly 6's top, the top at coaxial transmission subassembly 6 is connected to upper cover 3, the height of upper cover 3 is 0.955mm, the diameter of upper cover 3 is 0.6mm, upper cover 3 is the airtight encapsulation of coaxial transmission subassembly 6, go up cavity 1 simultaneously and lower cavity 2 including sealed with metal spine 4 and metal sheet 5, make single spine waveguide form closed waveguide, in order to reduce the energy leakage.

By adjusting the width and height of the metal ridge 4 and the thickness, shape and length of the capacitive metal plate 5, S (1, 1) is optimized, and the change of the step impedance between the metal ridge 4 and the coaxial transmission component 6 is obtained through optimization so as to avoid the difficulty in processing, during processing, the metal-plated layer of the ridge waveguide needs to be calculated according to the material of the ridge waveguide and the actual working frequency, so as to reduce the influence caused by the skin effect, the parameters and data in the embodiment are as above, the embodiment is at 85GHz-115GHz, the designed size is 0.74mm smaller than the width conventionally applied to the frequency band, and the relative bandwidth is wider, and the simulation result of the embodiment is as shown in fig. 5 and fig. 6.

In summary, in the embodiment of the present invention, the metal ridge is used as the single ridge waveguide and also used as the input port, and the coaxial transmission component is used as the output port, so that the wave energy is transmitted from the metal ridge to the coaxial transmission component to complete a transition, the energy is transmitted from the single ridge waveguide to the junction of the coaxial transmission component and the ridge waveguide, and then the energy is transmitted from the TE10 mode to the TEM mode in the conversion mode and then transmitted in the coaxial transmission component; the structure has the characteristics that the rectangular waveguide does not have, can be applied and tested in the practice of single-ridge waveguide, realizes the conversion of coaxial-ridge waveguide, is convenient to use, can be widely applied to a broadband waveguide system, and has great practical value.

This description describes examples of embodiments of the invention, and is not intended to illustrate and describe all possible forms of the invention. It will be appreciated by those of ordinary skill in the art that the embodiments described herein are intended to assist the reader in understanding the principles of the invention and are to be construed as being without limitation to such specifically recited embodiments and examples. Those skilled in the art can make various other specific changes and combinations based on the teachings of the present invention without departing from the spirit of the invention, and these changes and combinations are within the scope of the invention.