Simple way of Frequency Tuning using Pin Diode of Transmission type Digital Metasurface

Abstract

This article shows the frequency tuning using a PIN diode of transmission type digital metasurface. Here, the S21 amplitude of the unit cell in ON and OFF condition of the PIN diode is given the digital code of “0” when the S21 value is less than - 8 dB, and “1” when the amplitude is 0 dB respectively. It is observed that when the diode is ON, the 10 x 18 array shows the nature of OFF condition at 4 GHz. Similarly, when the diode is OFF, the array shows the ON nature at 4 GHz, thus getting ON or OFF condition at 2.54, 4, 6.84 GHz depending on the condition of the diode. This increases the bandwidth of operation.