How do I design a reconfigurable filter using MEMS switches for a multi-band radio?

A reconfigurable filter using MEMS (Micro-Electro-Mechanical Systems) switches for a multi-band radio uses electrostatically or piezoelectrically actuated mechanical switches to connect or disconnect resonator elements, capacitors, or coupling structures, allowing the filter's center frequency, bandwidth, or both to be electronically tuned between multiple discrete states. The design approach involves: selecting a tunable filter topology (switched capacitor banks on resonators shift the center frequency by changing the resonator's effective capacitance; switched coupling elements modify the bandwidth), designing the MEMS switch (ohmic contact switches for DC-6 GHz provide low insertion loss of 0.1-0.3 dB and high isolation of 20-40 dB when open; capacitive membrane switches for 6-100 GHz provide low loss and fast switching), integrating the switches into the filter layout (MEMS switches are typically fabricated on the same substrate as the filter using thin-film or MEMS fabrication processes; surface-mount packaged MEMS switches can be placed on a PCB filter), and designing the bias and control circuitry (electrostatic MEMS requires 20-80 V DC actuation voltage with nearly zero DC current; piezoelectric MEMS operates at 3-15 V; RF isolation between bias lines and the RF signal path must exceed 30 dB). Typical performance: center frequency tuning range of 20-50% (e.g., switching between 2.4 GHz Wi-Fi and 3.5 GHz 5G), insertion loss of 2-4 dB (including MEMS switch loss), return loss > 15 dB in each state, switching speed of 1-100 microseconds, and reliability of > 1 billion cycles for ohmic MEMS switches.