A novel dual-frequency RF MEMS phase shifter

The operating principle of the RF MEMS phase shifter is described. A novel design concept for dual-frequency RF MEMS phase shifter is proposed. By using network theory and CST microwave studio simulation tool, the proposed RF MEMS phase shifter is modelled. Simulation results show that the proposed model has the return loss less than −10dB and the insertion loss more than −2dB in two operating frequencies, both of which are more than 1GHz bandwidth. For one RF MEMS phase shifter, both 180-degree and 90-degree phase shift are realized.