Design of elliptical-shaped reconfigurable patch antenna with shunt capacitive RF-MEMS switch for satellite applications

Abstract

In this paper, non-uniform meandered line shunt capacitive RF-MEMS switch is presented at an elliptical patch etched with a split-ring resonator (SRR) for satellite communication applications. The non-uniform meander line shunt capacitive is a fixed-fixed type of RF-MEMS switch that is introduced in this model antenna. The proposed antenna design is resonated at 10.46 GHz with the return loss of −37.6 dB. The performance evolution of the proposed antenna design is evaluated with and without integrated RF-MEMS switch on the proposed antenna SRR. It is observed that the proposed model at the ON-state switch resonates at 10.57 GHz frequency with the return loss of −30 dB. Similarly, at the OFF-state switch, it resonates at 10.53 GHz frequency with the return loss of −43 dB. Al3N4 (aluminum nitride) is used for the switch as a dielectric material, hence the switch attains higher isolation. The actuation voltage of 7.9 V is required for the switch to actuate from ON to OFF state. The switch attains minimum insertion and return loss which is discussed in further sections. The proposed antenna is fabricated and tested by a vector network analyzer; there is a good agreement between the simulated and measured results.

Compact Dual-polarized Reconfigurable MIMO Antenna Based on a Varactor Diode for 5G Mobile Terminal Applications

“…This work aims to design, simulate, and fabricate reconfigurable antennas while investigating the viability of incorporating varactor diodes as integrated tuning components to control frequency and radiation patterns. Recent academic articles describe several antennas that can change frequency [9][10][11][12][13][14][15][16]. These antennas work in the frequency range of 1.5-4.35 GHz and use varactor diodes, pin diodes, or micro-electromechanical system (MEMS) switches to change their frequency.…”

“…However, adding varactor diodes and a decoupling circuit increases its complexity and may reduce its overall efficiency. An elliptical patch and a split-ring resonator (SRR) [16] make a nonuniform meandered line shunt capacitive RF-MEMS switch. This design attains two states with distinct resonant frequencies, allowing for frequency reconfiguration.…”