Adaptive filtering technologies have been driven by the growing need to have flexible and reconfigurable radio frequency (RF) front-end solutions in the next generation wireless systems. In this paper, an overall design, simulation, and analysis of a tunable bandpass filter (BPF) based on MEMS that is relevant in the process of dynamic spectrum access in advanced communication systems with specific reference to the 5G and 6G spectrum 6 GHz and below. The suggested filter takes advantage of the electrostatically driven MEMS capacitive devices, integrated with a small coplanar waveguide (CPW) derivative structure, to deliver a dynamic tuning of the center frequency with a broad variety of 2.5 GHz to 5.5 GHz. It has a design with low insertion loss, large return loss, and large quality factor (Q), which allows a low consumption of power to select the signal efficiently. Mechanical modeling, simulation and optimization of the behaviors of MEMS structures (including finite element method (FEM)-based mechanical responses and tunability characteristics) were done using COMSOL Multiphysics and the performance/impedance characteristics of the RF filter over the tuning range were validated using Keysight Advanced Design System (ADS). It is found that the filter has an insertion loss that is less than 1.6 dB, the best return loss of better than 15 dB and loaded Q-factors at the minimum insertion loss points well above 100. Moreover, the filter has a high degree of linearity, power handling, ability to be combined with CMOS-compatible fabrication processes and hence could be deployed as part of software-defined radios (SDRs), cognitive radios, and adaptive transceiver modules. The solution proposed to the specified problems in the field promises to include the major issues of miniaturization, spectral agility, and low power consumption creating the scalable and cost-efficient route that will enable the use of frequency-agile front-end modules in the wireless platforms that can be introduced in the future. The current work makes the contribution to further development of MEMS-enabled RF design not only but opens the door to the development of reconfigurable and intelligent RF system that would be able to work effectively within changing communication standards and environments.
