Quarter-wavelength structure millimeter wave switch

Abstract

The invention discloses a millimeter wave switch with a quarter-wavelength structure comprising a radio frequency signal input. A radio frequency signal input end is connected with input matching network; wherein the input matching network is respectively connected with a quarter-wavelength microstrip transmission line 1 and a microstrip transmission line 2, the microstrip transmission line 1 andthe microstrip transmission line 2 are respectively connected with the output matching network 1 and the output matching network 2 through the switching tube 1 and the switching tube 2, and the output matching network 1 and the output matching network 2 are respectively connected with the output end 1 and the output end 2; each switching tube is composed of at least two small-size transistors ofthe same size by adopting a reverse bias structure, and microstrip lines which are equal in length and adjustable are connected between emitting electrodes of the transistors of the same switching tube. According to the invention, the large-size switching tube is equally divided into a plurality of small-size transistors, the adjustable microstrip lines with the same length are introduced betweenthe emitters of the transistors, and the isolation degree of the millimeter wave switch with the quarter-wavelength structure can be greatly improved by optimizing the lengths of the adjustable microstrip lines.

Description

technical field [0001] The invention relates to the technical field of millimeter wave switches, in particular to a technology for improving the isolation of millimeter wave switches based on the improvement of the ratio of turn-off and on-resistance of millimeter wave switch tubes. Background technique [0002] The lower frequency ranges of the electromagnetic spectrum are currently allocated to many radio applications such as radio, television, satellite communications, mobile telephony, military applications, and radio astronomy, among others. With the further development of radio technology, the spectrum resources in the low-frequency band are already very crowded. For the needs of future communication applications, the channel capacity of the low-frequency band has been difficult to meet the requirements. However, in the millimeter wave frequency band, there are still a large number of frequency bands that have not been developed and utilized. Since the millimeter wave ...

AI Technical Summary

Problems solved by technology

[0006] Purpose of the invention: To solve the problem of poor isolation of existing quarter-wavelength millimeter-wave switches, the present invention proposes a high-isolation millimeter-wave switch based on the improvement of the turn-off and on-resistance ratio of the millimeter-wave switch.

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