Reconfigurable dielectric resonator antenna with multiple polarisation states

The realisation of an electronically tuned polarisation reconfigurable dielectric resonator antenna with multiple switchable states is described in this study. The antenna is fed by a microstrip line through a cross-slot aperture placed in the ground plane to achieve circular polarisation. PIN diodes have been placed across the cross slots to control their effective dimensions and thereby its sense of polarisation. The antenna is connected to a microcontroller (ARDUINO-UNO) to switch between corresponding polarisation states. Simulated results of the antenna are verified with experimental data. The antenna has an impedance bandwidth of about 20% for all four states of polarisations. The antenna also radiates with a gain of 4 dB over the entire band.

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