CN221841995U - An E-band four-way waveguide power divider-synthesizer - Google Patents

Abstract

The utility model discloses an E-band four-way waveguide power distribution-synthesizer, which belongs to the field of satellite communication technology; it includes: a waveguide magic T, a waveguide-microstrip-waveguide conversion structure, and a gradient absorber; its shielding box structure is divided into a lower cavity, an upper cavity, a long cover plate and a short cover plate. The waveguide magic T is a four-port device composed of a waveguide E-T junction, two waveguide horn gradient sections, a microstrip probe and an H-plane probe-waveguide conversion structure; the magic T is easy to process, simple to assemble, and has excellent indicators. Its isolation port can be built-in with a gradient absorber or externally connected with a high-power waveguide load. The waveguide-microstrip-waveguide conversion structure is composed of two E-plane waveguide-probe transitions and a section of 50-ohm microstrip line. The utility model has the characteristics of wide frequency band, small insertion loss and high isolation, and can realize eight-way, sixteen-way, thirty-two-way and other large power synthesis through cascading. The utility model is suitable for E-band solid-state power amplifiers and has high promotion and application value.

Description

An E-band four-way waveguide power divider-synthesizer

Technical Field

The utility model relates to an E-band four-way waveguide power distributor-synthesizer in the technical field of satellite communication, and is particularly suitable for an E-band solid-state power amplifier applied to a satellite communication microwave channel.

Background Art

With the vigorous development of satellite communications, the resources of C, Ku and Ka bands are becoming increasingly scarce. Satellite communications are gradually expanding to higher frequency bands, and the E band (uplink frequency 81-86GHz; downlink frequency 71-76GHz) has become the research frontier in the field of satellite communications. Internationally, Italy and the United States have successively carried out research on E-band satellite communications projects since 1997; domestic research on E-band satellite communications is still in its early stages.

The output power of a single solid-state power amplifier chip in the E-band is limited. In order to obtain high-power output, power synthesis must be performed; in order to avoid interference between power distribution and synthesis, a high-isolation power distribution-synthesizer must be developed. The waveguide magic T is a commonly used high-isolation waveguide power distribution-synthesizer, but the space inside the standard waveguide in the E-band is small. Therefore, the components used to achieve port matching of the waveguide magic T, such as cones, pins, metal diaphragms, etc., are difficult to process and assemble, and it is difficult to ensure the performance indicators of the waveguide magic T. "An E-plane waveguide magic T with coplanar arms" published in the "Proceedings of the 2013 National Antenna Annual Conference" proposed a coplanar and easy-to-process waveguide magic T in the Ka band, but the magic T is not suitable for high-power synthesis, and the step gradient sections of the two side arms are complicated to process.

Utility Model Content

In order to overcome the deficiencies of the prior art, the utility model proposes an E-band four-way waveguide power distributor-synthesizer based on a waveguide magic T, which has the characteristics of wide frequency band, small insertion loss and high isolation.

The technical solution adopted by the utility model is:

An E-band four-way waveguide power distributor-synthesizer, comprising a shielding box; a waveguide magic T, a waveguide-microstrip-waveguide conversion structure and a gradient absorber;

The shielding box comprises an upper entity and a lower entity; the upper entity is provided with a through rectangular cavity; the upper surface of the lower entity is provided with a rectangular groove; the rectangular groove and the rectangular cavity correspond to each other and are located on the same straight line; the upper part of the rectangular cavity is blocked by a cover plate, and a gradient absorber is provided in the rectangular cavity on the inner side of the cover plate;

The upper entity and the lower entity are buckled to form a horizontally extending channel; the input end of the channel is the main path of the input waveguide magic T, and the end of the input waveguide magic T is two paths, which are respectively divided into four paths through the second-level input waveguide magic T; the output end of the channel is the main path of the output waveguide magic T, and the two-way input ports of the output waveguide magic T are respectively connected to the output ports of the second-level output waveguide magic T, and the input ports of the second-level output waveguide magic T correspond to the four-way ports of the output end respectively; the four-way ports of the input end correspond to the four-way ports of the output end one by one, and are respectively connected through corresponding waveguide-microstrip-waveguide conversion structures;

The rectangular grooves correspond to the positions of the waveguide E-T junctions 9 of each waveguide magic T one by one, and are respectively located on the inner side of the corresponding waveguide E-T junctions 9; a microstrip probe 10 is introduced into the waveguide E-T junction 9, and the end of the microstrip probe 10 extends to the rectangular groove to form an H-plane probe-waveguide conversion structure 11;

The waveguide-microstrip-waveguide conversion structure 6 couples the electric field in the waveguide to the microstrip through an E-plane waveguide-probe transition 13, the signal is transmitted through a 50-ohm microstrip line 14, and finally the microstrip signal is coupled to the waveguide for output through an E-plane probe-waveguide transition 15.

Furthermore, the gradient absorber is a wedge-shaped body.

Furthermore, the bottom of the rectangular groove is a waveguide short-circuit surface; and the top of the rectangular through cavity serves as an H-plane standard waveguide output port.

Furthermore, the distance between the central axis of the probe used for transition and the short-circuit surface of the waveguide is one quarter of a wavelength.

Furthermore, the waveguide magic T is mainly composed of a waveguide E-T junction, two waveguide horn gradient sections and an H-plane probe-waveguide conversion structure; the main route of the waveguide magic T is divided into two waveguide horn gradient sections by the waveguide E-T junction, and the H-plane probe-waveguide conversion structure is provided at the end of the waveguide horn gradient section.

Compared with the prior art, the beneficial effects of the utility model are:

The utility model proposes an E-band four-way waveguide power distributor-synthesizer in the E-band (81-86GHz), which has the characteristics of wide frequency band, small insertion loss and high isolation. The waveguide magic T is easy to process, simple to assemble and has excellent indicators. The H-plane isolation port can be installed with a cover plate and a built-in gradient absorber as a low-power waveguide matching load, or the cover plate can be removed and an external high-power waveguide matching load can be connected; through the cascade of the waveguide magic T, eight-way, sixteen-way, thirty-two-way and other large power synthesis can be achieved. The utility model is particularly suitable for E-band solid-state power amplifiers and has a high value of promotion and application.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a block diagram of a four-way waveguide power splitter-synthesizer of the present utility model;

FIG2 is a schematic diagram of the appearance structure of a four-way waveguide power distributor-synthesizer of the present utility model;

FIG3 is a schematic diagram of the structure decomposition of a four-way waveguide power distributor-synthesizer of the present invention;

FIG4 is a schematic diagram of the physical planar structure of the four-way waveguide power distributor-synthesizer of the present invention;

FIG5 is a schematic diagram of the planar structure of the waveguide magic T back-to-back structure of the present invention.

DETAILED DESCRIPTION

In order to facilitate those skilled in the art to understand the technical content of the present invention, the present invention is further described below in conjunction with the accompanying drawings.

Referring to Figures 1 to 5, the utility model is an E-band four-way waveguide power distributor-synthesizer, wherein the shielding box is divided into a lower entity 1, an upper entity 2, a long cover plate 3 and a short cover plate 4. The power distributor-synthesizer comprises: a waveguide magic T5, a waveguide-microstrip-waveguide conversion structure 6 and a gradient absorber 7.

The lower entity 1, the upper entity 2, the two long cover plates 3 and the two short cover plates 4 constitute a shielding box. The input and output waveguide interfaces are each equipped with two pins 8. When connecting an external waveguide device, the pins 8 can ensure that the inner and outer waveguide ports are precisely aligned. The lower entity 1 is processed with a threaded hole, and the upper entity 2 is processed with a cylindrical countersunk hole and a conical countersunk hole. The upper and lower entities are tightly fitted by fastening with suitable screws.

The waveguide magic T5 introduces a microstrip probe 10 into the waveguide E-T junction 9. The head of the microstrip probe 10 goes deep into the cavity and participates in the impedance matching of the waveguide E-T junction 9. In addition, the microstrip probe 10 converts the unbalanced input of the two side arm ports into a microstrip mode. The other end of the microstrip probe 10 and the waveguide cavity form an H-plane probe-waveguide conversion structure 11. The waveguide short-circuit surface is located in the lower cavity 1, and the H-plane standard waveguide output port is located in the upper cavity 2. The H-plane waveguide output port is an isolated port and needs to be connected to a waveguide matching load. In this embodiment, a gradient absorber 7 is built into the end of the H-plane waveguide to form a waveguide matching load. If it is to be used as a high-power distributor-synthesizer, the long cover plate 3 and the short cover plate 4 can be removed, and a high-power waveguide matching load can be connected externally. The waveguide horn gradient section 12 is used to match the half-size narrow-edge waveguide to the standard rectangular waveguide port. It is easier to process than the waveguide step gradient section. Its function is to improve the port standing wave and achieve a wider operating frequency.

The waveguide-microstrip-waveguide conversion structure 6 couples the electric field in the waveguide to the microstrip through an E-plane waveguide-probe transition 13. The signal is transmitted through a 50-ohm microstrip line 14, and finally the microstrip signal is coupled to the waveguide for output through an E-plane probe-waveguide transition 15. The E-plane waveguide-probe transition 13 and the E-plane probe-waveguide transition 15 have the same structure; the distance between the central axis of the microstrip probe and the waveguide short-circuit surface is one-quarter wavelength, ensuring that the probe is at the strongest electric field position in the waveguide to achieve the highest possible coupling efficiency.

In this embodiment, an E-band four-way waveguide power divider-synthesizer comprises: a waveguide magic T5, a waveguide-microstrip-waveguide conversion structure 6, and a gradient absorber 7; its shielding box structure is divided into a lower cavity 1, an upper cavity 2, a long cover plate 3 and a short cover plate 4.

Among them, the waveguide magic T5 is a four-port device consisting of a waveguide E-T junction 9, two waveguide horn gradient sections 12, a microstrip probe 10 and an H-plane probe-waveguide conversion structure 11; the H-plane waveguide output port is an isolation port and needs to be connected to a waveguide matching load; the dielectric plate is made of quartz material with a thickness of 0.127mm, and the bottom of the dielectric plate is bonded to the lower cavity groove with conductive glue.

Among them, the waveguide-microstrip-waveguide conversion structure 11 is composed of an E-plane waveguide-probe transition 13, an E-plane probe-waveguide transition 15 and a 50-ohm microstrip line 14; the dielectric plate is made of quartz material with a thickness of 0.127 mm, and the bottom of the dielectric plate is bonded to the lower cavity groove with conductive glue.

The gradient absorber 7 is a wedge-shaped absorbing material suitable for the E frequency band.

Among them, the standard waveguide cavity is a WR10 waveguide interface, and the waveguide port size is 2.540mm×1.270mm.

The brief working principle of the utility model is as follows:

Referring to Figure 1, the E-band input signal is input from the standard waveguide cavity, and outputs two equal-amplitude and anti-phase signals through the first-stage waveguide magic T5; the two signals enter the two waveguide magic T5s of the second stage respectively, and output four signals; the four signals pass through the waveguide-microstrip-waveguide conversion structure 6, enter the two waveguide magic T5s respectively, and are synthesized into two signals; the two signals enter the waveguide magic T5, are synthesized into one E-band signal, and are finally output from the standard waveguide cavity.

Those skilled in the art will appreciate that the embodiments described are intended to help readers understand the principles of the present invention, and should be understood that the scope of protection of the present invention is not limited to the embodiments described. For those skilled in the art, the present invention may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of the claims of the present invention.

Claims (5)

1. An E-band four-way waveguide power divider-synthesizer, comprising a shielding box; characterized in that it comprises a waveguide magic T, a waveguide-microstrip-waveguide conversion structure and a gradient absorber; The shielding box comprises an upper entity and a lower entity; the upper entity is provided with a through rectangular cavity; the upper surface of the lower entity is provided with a rectangular groove; the rectangular groove and the rectangular cavity correspond to each other and are located on the same straight line; the upper part of the rectangular cavity is blocked by a cover plate, and a gradient absorber is provided in the rectangular cavity on the inner side of the cover plate; The upper entity and the lower entity are buckled to form a horizontally extending channel; the input end of the channel is the main path of the input waveguide magic T, and the end of the input waveguide magic T is two paths, which are respectively divided into four paths through the second-level input waveguide magic T; the output end of the channel is the main path of the output waveguide magic T, and the two-way input ports of the output waveguide magic T are respectively connected to the output ports of the second-level output waveguide magic T, and the input ports of the second-level output waveguide magic T correspond to the four-way ports of the output end respectively; the four-way ports of the input end correspond to the four-way ports of the output end one by one, and are respectively connected through corresponding waveguide-microstrip-waveguide conversion structures; The rectangular grooves correspond to the positions of the waveguide E-T junctions (9) of each waveguide magic T one by one, and are respectively located on the inner side of the corresponding waveguide E-T junctions (9); a microstrip probe (10) is introduced into the waveguide E-T junction (9), and the end of the microstrip probe (10) extends to the rectangular groove to form an H-plane probe-waveguide conversion structure (11); The waveguide-microstrip-waveguide conversion structure (6) couples the electric field in the waveguide to the microstrip through an E-plane waveguide-probe transition (13), the signal is transmitted through a 50-ohm microstrip line (14), and finally the microstrip signal is coupled to the waveguide for output through an E-plane probe-waveguide transition (15). 2. An E-band four-way waveguide power divider-synthesizer according to claim 1, characterized in that the gradient absorber is a wedge. 3. An E-band four-way waveguide power divider-synthesizer according to claim 1, characterized in that the bottom of the rectangular slot is a waveguide short-circuit surface; and the top of the rectangular through cavity serves as an H-plane standard waveguide output port. 4. An E-band four-way waveguide power divider-synthesizer according to claim 1, characterized in that the distance between the central axis of the probe used for transition and the waveguide short-circuit surface is one-quarter of a wavelength. 5. An E-band four-way waveguide power divider-synthesizer according to claim 1, characterized in that the waveguide magic T is mainly composed of a waveguide E-T junction, two waveguide horn gradient sections and an H-plane probe-waveguide conversion structure; the main route of the waveguide magic T is divided into two waveguide horn gradient sections by a waveguide E-T junction, and the H-plane probe-waveguide conversion structure is provided at the end of the waveguide horn gradient section.