High-pass/low-pass section design for 0$^{\circ}$-360$^{\circ}$ lumped-element phase shifters via the real frequency technique

Authors: METİN ŞENGÜL

Abstract: In this paper, an algorithm based on the real frequency technique (RFT) is proposed to design high-pass and low-pass sections of a 0$^{\circ}$-360$^{\circ}$ wide range lumped-element phase shifter. The switching process, however, is not considered in this work. In the algorithm, it is enough to define the section type (high-pass or low-pass) and the number of elements in the sections; there is no need to select the exact circuit topologies for the high-pass and low-pass sections. This is a natural consequence of the proposed approach. Unlike in the methods described in the literature, there is also no need to derive element value expressions. Two examples are given to illustrate the utilization of the proposed algorithm. The proposed algorithm and results are verified by simulation.

Keywords: Phase shifters, real frequency technique, lossless networks, passive networks, switched filters, low-pass, high-pass

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