Design of a 6-bits semiconductor integrated phase shifter for radar applications

Phase shifters present the key components in the field of phased array antenna. They are used to electrically shape and steer the antenna beam. In this paper, the design and simulation of S-band 6-bits phase shifter based on semiconductor switch is suggested. The proposal is designed by combining the properties of reflection and switched lines and it consists of two stages. The first stage is realized in switched-reflection topology and it is composed by a branch line coupler, a semiconductor switch and vertical and horizontal delay lines. The second stage is composed of two cells of serial cascade switched delay line. The two stages are integrated to increase the phase shifter resolution. Our proposal is validated through numerical simulation and we show that our 6-bits integrated phase shifter is capable of providing 64 different phases separated by 5.625° over the frequency band 2.2-2.6 GHz.

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