Switching wiring phase shifter

Abstract

A switch linear phase shifter in the field of micro-electromechanical technology. The phase shifter of the present invention is composed of a section of interdigitated coplanar waveguide transmission line, a section of traditional coplanar waveguide transmission line, micromechanical switch, switch feeder and dielectric substrate, interdigitated coplanar waveguide transmission line, traditional coplanar waveguide transmission line, micromechanical The switch and the switch feeder are all set on the dielectric substrate. The interdigitated coplanar waveguide transmission line and the traditional coplanar waveguide transmission line constitute the two transmission paths of the switch line phase shifter. The switch feeder is connected with the micromechanical switch to control The micromechanical switch is turned on and off, and the external signal is controlled by the micromechanical switch and the switch feeder to select one of the transmission paths. The invention adopts the interdigitated coplanar waveguide transmission line and the traditional coplanar waveguide transmission line as the transmission path of the switch line type phase shifter, which can effectively reduce the overall size of the phase shifter, and the wiring is simple. By adjusting the interdigitated coplanar waveguide transmission line and the The structural parameters of the traditional coplanar waveguide transmission line can get low insertion loss.

Description

technical field [0001] The invention relates to a device in the field of micro-electromechanical technology, in particular to a switch linear phase shifter. technical background [0002] Microwave phase shifter is an important component in communication and radar technology. The basic types mainly include switch line type, loading line type and reflection type, among which switch line type is the simplest structural form. It uses switches to select different transmission paths. , using different electrical lengths of different transmission paths to generate phase shifts. In order to further improve the performance of the phase shifter, on the basis of the development of micro-machining technology, people use micro-mechanical switches to replace traditional switches, and many new types of switch linear phase shifters have been designed, most of which are The microstrip line is used as the transmission path, and the traditional coplanar waveguide transmission line is also use...

AI Technical Summary

Problems solved by technology

[0003] After searching the literature of the prior art, it was found that Guan-Leng Tan et al published the article "Low-loss 2-and 4-bit TTD MEMS phase shifters based on SP4T switches" (low loss 2-bit and 4-bit real-time delay MEMS phase shifters based on single-pole four-throw switches), in which microstrip lines are used as signal transmission paths, and single-pole four-throw switches are used as switching elements A four-position switch linear phase shifter was designed and produced. The specific method is to use two single-pole four-throw switches to control four transmission paths with different electrical lengths to form a two-phase shifter, and then two two-phase shifters are cascaded to form a four-way phase shifter. Phase shifter, its disadvantage is that the wiring is complicated, the overall size is large, and the insertion loss is high; it is also found in the search that JadB. ") in "W-band CPW RF MEMS circuits on quartz substrates" (W-band coplanar waveguide RF MEMS circuits on quartz substrates) used traditional coplanar waveguide transmission lines as the transmission path, and made a parallel capacitive switch Four phase shifters, the disadvantage is that the space is not fully utilized, and the overall size is large

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