Paper Details

A four-port microwave phase detector based on MEMS power sensors at S-band (2–4GHz).Expanded powerup to 4W at S-band proposed in this project. It consists of two power dividers, two power combiners, two phase shifters,and two MEMS power sensors. Four power dividers/combiners and two phase shifters compose a four-port junction toexpand the phase detection range. A thermoelectric power sensor and a capacitive power sensor compose the MEMSpower sensor for low and high power measurement. Two types of power sensors can improve the measurement rangeand enhance the overload capacity. This microwave phase detector is fabricated by GaAs monolithic microwaveintegrated circuit technology. Experiments show that its return loss is better than -4dB, and the isolation is better than-6.2 dB over S-band. Measured results of the phase shift fit well with the calculated results in an entire cycle of -180° ~+180°. The phase detection sensitivities are 7.62 µV/° and 11.94 aF/°, and the response times are 0.108 ms and less than10 ms for the two types of sensors, respectively. The power expanded up to 4W for our previous works based on S-Band butnow I can implement the dynamic range of phase detector can be expanded up to 4W based on S-band

R. Elumalai, Prof. K. Beulah Suganthy, “A FOUR-PORT MICROWAVE PHASE DETECTOR AT S-BAND BASED ON MEMS POWER SENSORS”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 5, Issue 20, pp. -, January 2018.