Rectangular substrate integrated waveguide sharing cavity-based duplexer

Abstract

The invention discloses a rectangular substrate integrated waveguide sharing cavity-based duplexer. The duplexer comprises a rectangular dielectric substrate (5), a metal grounding layer (4) and a metal layer (7), wherein the metal grounding layer (4) is fully attached onto a lower surface of the dielectric substrate (5), the metal layer (7) is attached onto an upper surface of the dielectric substrate (5), the duplexer also comprises a plurality of metal through holes (6), the plurality of metal through holes (6) penetrate through the dielectric substrate to connect the metal layer (7) and the grounding layer (4), a rectangular sharing cavity (a), a first low-frequency rectangular cavity (b), a first high-frequency rectangular cavity (e), a second low-frequency rectangular cavity (c) and a second high-frequency rectangular cavity (d) are encircled by the plurality of metal through holes (6), the first low-frequency rectangular cavity (b) and the high-frequency rectangular cavity (e) are adjacent to a long edge of the sharing cavity (a), the second low-frequency rectangular cavity (c) is connected with the first low-frequency rectangular cavity (b), and the second high-frequency rectangular cavity (d) is connected with the first high-frequency rectangular cavity (e). The duplexer is high in integration, the bandwidth ratio is easy to change, and the frequency is enough high and is controllable.

Description

Technical field [0001] The invention belongs to the technical field of frequency selective devices, in particular to a duplexer based on a rectangular substrate integrated waveguide shared cavity with high integration, easy to change bandwidth ratio, high frequency and controllable. Background technique [0002] Duplexer is a kind of passive microwave device developed on the basis of filter, specially designed to solve the problem of transmitting and receiving a common antenna. [0003] Duplexers are generally divided into two types: transceiver switches and frequency band duplexers. The former is mainly used in time-division multiplexed radar systems. When transmitting, the antenna and transmitter are connected, but the receiver is disconnected; when the transmission pulse is over, the antenna and receiver are connected immediately, and the transmitter is disconnected. The latter is to use the same antenna to transmit and receive signals in different frequency bands. It can impro...

AI Technical Summary

Problems solved by technology

[0005] However, the problems of the above-mentioned frequency band duplexer are: (1) the use of a T-junction to connect two branch filters results in low integration of the duplexer and a large volume

(3) The frequency is too low to meet the needs of contemporary communication frequency band expansion

Images