A Low-Profile Reconfigurable Wide Band BPF with RF-MEMS Switches for 5G/ Satellite Applications
Received: 2 October 2024 | Revised: 14 October 2024 | Accepted: 22 October 2024 | Online: 2 December 2024
Corresponding author: Surendra Babu Velagaleti
Abstract
A low-profile wide-band tunable semi-circular cavity BPF is designed and analyzed in this work. RF-MEMS switches were utilized on either side of the 50 Ω microstrip transmission lines to provide reconfigurability. BPF tunability is achieved when the two switches travel from upstate to downstate in an electrostatically activated shunt capacitive shunt type RF-MEMS switch. The switch has a capacitance ratio of 10 and operates at a transition time of 30 μS with an actuation voltage of 6.5 V to move it downward. This is suitable for 5G wireless communication applications (n77, n78, and n79) as well as C-band applications. Return loss of -22 dB is obtained at 3.7 GHz when the switch is in the ON state, while reflection co-efficient of -32 dB is obtained at 6.7 GHz when the switch is in the OFF state. When both switches are ON or OFF, a bandpass filter provides a 3GHz frequency shift. The frequency range where BPF is intended to operate, which is adjustable for various purposes, is 1–10 GHz. The characteristics of the switch were investigated by simulating its design in COMSOL Multiphysics and the outcomes were contrasted with theoretical computations. The adjustable properties of the BPF have been observed and shown using the HFSS v 13 tool.
Keywords:
5G applications, semi-circular cavity, return loss, insertion loss, transition time, satellite communication applicationsDownloads
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