Minimized Losses with High Isolation Pin Diode Based X-Band SP4T Switch for Phased Array Antenna Application

This paper presents the design and implementation of PIN diode based X-band SP4T (Single pole 4-throw) switch. It is designed to operate in the X-band range of 8 to 8.4GHz frequencies which is useful for phased array antenna applications. PIN diodes, resistors, capacitors and other printed components are assembled on an RT-DUROID substrate which has the dielectric constant of 10.2. Transmission line lengths are optimized in this design to minimize losses, while keeping good isolation. The following work is done in ADS software. The proposed structure improves its performance by minimizing the losses and achieve -28.04dB return loss, -0.94dB insertion loss and -41.70dB isolation.