modeling of a pin diode rf switch for reconfigurable antenna application

The paper proffers the procedure to model a pin diode rf switch using fullwave em solver, hfss and utilizes the switch to built a simple partial ground plane antenna with omnidirectional radiation pattern. the proposed antenna has ability to tune it from ultrawideband to narrowband mode. the frequency reconfigurability is accomplished by incorporating a rectangular slot resonator and a pin diode rf switch embedded in the partial ground plane. the antenna demonstrates 10 db impedance bandwidth from 500 mhz to 6 ghz in the ultrawideband mode and 1.125 ghz to 2 ghz in the narrowband mode. a parasitic is stacked in the ground plane to improve the impedance matching and a rectangular slot is fused to explore the bandwidthlimiting possibility of the antenna. the optimization of the antenna is done by fullwave em solver, hfss and specific absorption rate (sar) of the antenna is examined using the equivalent flat tissue phantom. a prototype of the proposed antenna is fabricated and execution is accepted by measured results. the proposed antenna has simple and miniature structure, low sar (0.41 w/kg), omnidirectional pattern and low crosspolarization (