DESIGN AND ANALYSIS OF 1 × 8 RF POWER DIVIDER/COMBINER USING IMPEDANCE LIMITATION METHOD FOR C-BAND AIRBORNE SYNTHETIC APERTURE RADAR APPLICATIONS

This paper presents an unequal power-feeding network design using quarter-wave microstrip lines realized in advanced design system technology (ADS) for synthetic aperture radar-based applications (SARs). The point of the research work is to decrease the size of the power-feeding network by employing a simple technique while achieving electrical performance comparable to that of a conventional power divider realized using Microstrip lines. The Impedance limiting technique is used to develop a 1 × 8 unequal power divider (UPD). The planned power divider’s center frequency has been set at 5.3 GHz. The proposed work is deployed on a 1.6 mm thick Rogers Trademark (RT) Duroid substrate of dielectric constant 2.2. In this technique, one of the quarter-wave transmission line’s impedance, i.e., arbitrary impedance (A = 35), is chosen. We can lower the impedance values of other transmission lines and the complexity by picking less impedance. ADS software can help with the design concept and optimization development. The feed network of a phased array for an aerial radar system with digital beamforming capability will use these power dividers. The outcomes are in line with the design objectives. Return loss is better than –20 dB and power coupling is precise and some losses are present due to transmission lines and isolation is better than –25 dB at adjacent ports. © 2022 by Begell House, Inc.