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A 340ghz Broadband Duplexer Based on Thin Film Devices

A broadband duplexer and thin-film technology, which is applied in the field of radar and communication, can solve the problems that the principle cannot be realized, and achieve the effects of material saving, efficiency improvement and high isolation

Active Publication Date: 2019-10-22
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For electromagnetic waves in the terahertz frequency band, the wavelength enters the order of millimeters, and the principle of the above-mentioned duplexer cannot be realized

Method used

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  • A 340ghz Broadband Duplexer Based on Thin Film Devices
  • A 340ghz Broadband Duplexer Based on Thin Film Devices
  • A 340ghz Broadband Duplexer Based on Thin Film Devices

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Embodiment 1

[0029] like figure 1 As shown, the absorbing cavity adopts a cuboid module of 60mm×60mm×180mm, and the internal electromagnetic wave transmission channel is an inner cavity with a diameter of 30mm. In order to reduce the multi-path reflection of electromagnetic waves around the metal cavity, the ferrite absorbing material BMA-RD of North Mining Magnetic Materials Co., Ltd. is used to mount the inner surface of the metal box. A layer of BMA-RD ferrite absorbing material is mounted on the internal surface.

[0030] like figure 2 As shown, if the electromagnetic wave emitted by the transmitting antenna is a vertical linearly polarized wave, the polarization isolator can smoothly pass the transmitted vertical linearly polarized wave, and the transmission loss is maintained below 0.5dB; for the receiving antenna (its polarization direction perpendicular to the transmitting antenna), the transmitted wave of the horizontally polarized component will be isolated most of the power a...

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Abstract

The invention discloses a thin film device-based 340GHz broadband duplexer, being capable of solving the problem of isolation of receipt and transmission of signals at a same frequency point in the prior art. The duplexer comprises a microwave absorption cavity, a polarization isolator and a polarization converter, wherein the microwave absorption cavity is a T-shaped cylindrical cavity, the polarization isolator is an oval metal gasket, a thin film with metal wire grating is arranged at one end of the oval metal gasket, and the device is positioned in a horizontal cavity of the microwave absorption cavity and forms an angle of 45 degrees with the horizontal cavity; and the polarization converter is perpendicularly positioned in the microwave absorption cavity.

Description

technical field [0001] The invention relates to the technical field of radar and communication, in particular to a 340GHz thin-film-based device broadband duplexer. Background technique [0002] In a wireless system, the transmitter works at ultra-high power, while the receiver works at ultra-low power. When sending and receiving information needs to be completed at the same place, how to ensure that the power of the transmitter does not enter the receiver and cause the receiver to burn is to ensure the system A necessary condition for normal operation, a device that implements this function becomes a duplexer. The forms of duplexers in the low frequency microwave band mainly include waveguide duplexers, coaxial duplexers, dielectric duplexers, Surface Acoustic Wave-SAW duplexers, and microstrip duplexers. Due to the limited manufacturing process, it is extremely difficult to realize the duplexer in the terahertz band. At present, the current practical waveguide type duplex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/215H01P1/17H01Q15/24
Inventor 王学田张盟
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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