A Wide Phase Range Compact T-Section Digital Phase Shifter Topology

Abstract

In this chapter, a novel T-section-based digital phase shifter topology. This topology provides a relatively wide phase shift and wide frequency band performance over the classical phase shifters employing compact CMOS switches. All the designs presented in this chapter simulate the operation of low-pass/high-pass LC T-section. The proposed compact switching technique together with microwave monolithic integrated circuit (MMIC) implementation enables the phase shifter cells to have small size, which makes them suitable for the next generation communication systems such as 5G, universal mobile telephone systems, etc. For the user selected phase and bandwidth, explicit design equations, design algorithms, and the performance analysis tools arc provided. It is shown that employing the commercially available 0.18-μm silicon CMOS technology, 0° — 360° phase-shift range is possible. An example is presented to design a 45° phase shifting unit over 5-10 GHz bandwidth. It is exhibited that the proposed novel digital phase shifter topology yields a compact size, broad frequency band, wide phase-shift range, low loss, and low phase-shift perturbation. Figure 14.1 594Proposed simple and compact phase shifter topology. https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781003337867/27267fab-f692-4886-a0c9-8d3c4a6f39f3/content/fig14_14_1.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/>