Ultra-wideband phase shifter

Abstract

The present invention provides an ultra-wideband phase shifter comprising a first dielectric sheet, a second dielectric sheet, a metal sheet, ferrites and a waveguide. The first dielectric sheet, the second dielectric sheet and the metal sheet are sequentially stacked up and are fixedly bonded together by the conductive adhesive. The surface of the second dielectric sheet, adjacent to the first dielectric sheet, is provided with a groove. A nematic liquid crystal is injected into a cavity enclosed by the groove and the first dielectric sheet. The outer surface of the first dielectric sheet and the outer surface of the metal sheet are sequentially and respectively provided with at least two layers of ferrites. An excitation wire passes through the ferrites. The first dielectric sheet, the second dielectric sheet, the metal sheet and the ferrites are located in the cavity of the waveguide. The two ends of the waveguide are respectively provided with a first matched medium and a second matched medium. The two ends of the first dielectric sheet and the two ends of the second dielectric sheet are in contact with the first matched medium. The two ends of the ferrites are in contact with the second matched medium. The dielectric constant of the first matched medium is larger than the dielectric constant of the second matched medium. The ultra-wideband phase shifter can be used for phase shifting within the range of ultra-wideband microwave frequency band.

Description

technical field [0001] The invention relates to the technical field of microwave devices, in particular to an ultra-wideband phase shifter. Background technique [0002] A phase shifter is a device that adjusts the phase of a wave, and is widely used in the fields of radar, missile attitude control, accelerator, communication, and instrumentation. At present, ferrite devices are widely used in various radar systems, among which waveguide microwave ferrite devices occupy half of the country. Both passive phased array radar and sub-array active phased array radar system need to use a large number of these devices. The waveguide ferrite device can control the amplitude or phase of the passing microwave signal in the antenna feeder, but a certain dielectric matcher must be used to match the ferrite waveguide and the empty waveguide. With the development of radar technology, broadband work has become a development trend, and the conventional matching method used in waveguide mi...

AI Technical Summary

Problems solved by technology

The waveguide ferrite device can control the amplitude or phase of the passing microwave signal in the antenna feeder, but a certain dielectric matcher must be used to match the ferrite waveguide and the empty waveguide

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