Back to Back Wide-Band CPW-to-Waveguide Transition with RF MEMS Shunt Switch in W-Band

MEMS shunt switch mounted on CPW is proposed to be integrated with CPW-to-rectangular waveguide transitions at both ends in W-band. The MEMS shunt switch is of low actuation voltage with high isolation SPST switch. The transition is probe based without any mechanical contact and is thus easy to fabricate. Measured results for X-band design is in well agreement with the simulations carried out in high frequency structure simulator. W-band results are thus simulated on similar lines and presented. In both cases, the return loss is over 15 dB and an insertion loss of less than 1 dB mostly over the band. The switch states are simulated being integrated with CPW-to-waveguide transitions for ON and OFF states for RF and S-parameters studied in W-band and found satisfactory.