A 340GHz quasi-optical broadband duplexer based on thin-film devices

Abstract

The present invention discloses a 340GHz Quasi-optical broadband diplexer based on a film type device. The diplexer comprises a wave-absorbing cavity, a polarized isolator, a polarized converter, a pair of 340GHz transmit-receive reciprocal horn antennas and a pair of antenna supports; the wave-absorbing cavity is a cylindrical cavity with a T-shaped external shape; one side of the polarized isolator is provided with a film with a metal line grating; the polarized isolator is fixed at the linkage position of the horizontal section and the vertical section in the wave-absorbing cavity, and the polarized isolator and the horizontal section form a 45-degree included angle; the polarized converter is a circular metal gasket, surfaces of two sides of the polarized converter are pasted with films, each film is provided with a periodic metal unit array, each metal unit is a rectangular sheet metal penetrating the surfaces of the films, and a row of square sheet metals are uniformly arranged between two adjacent rectangular sheet metals; and the polarized converter is inclined at a certain angle and fixed in the horizontal section of the wave-absorbing cavity. The 340GHz Quasi-optical broadband diplexer based on the film type device can solve the problem of the transmit-receive isolation of same-frequency point signals in the prior art, and can reduce the multipath effect of the electromagnetic wave.

Description

technical field [0001] The invention relates to the technical field of radar and communication, in particular to a 340 GHz quasi-optical broadband duplexer based on thin-film devices. Background technique [0002] In a wireless system, the transmitter works at ultra-high power, while the receiver works at ultra-low power. When it is necessary to send and receive information at the same place, how to ensure that the power of the transmitter does not enter the receiver and cause the receiver to burn out is a guarantee for the system. A necessary condition for normal operation, the device that realizes this function becomes a duplexer. The duplexers in the low-frequency microwave band mainly include waveguide duplexers, coaxial duplexers, dielectric duplexers, surface acoustic wave (SurfaceAcousticWave-SAW) duplexers, and microstrip duplexers. The duplexer is limited by the manufacturing process, and it is extremely difficult to realize in the terahertz band. At present, the e...

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Problems solved by technology

[0004] In view of this, the present invention provides a 340 GHz quasi-optical broadband duplexer based on thin-film devices, which can not only solve the problem of transmitting and receiving signals at the same frequency point in the prior art, but also reduce the multipath effect of electromagnetic waves

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