Abstract
A novel high-isolation, monostatic, circularly polarized (CP) simultaneous transmit and receive (STAR) anisotropic dielectric
resonator antenna (DRA) is presented. The Proposed antenna is composed of two identical but orthogonally positioned annular
sectoral anisotropic dielectric resonators. Each circularly polarized (CP) resonator consists of alternating stacked dielectric
layers of relative permittivities of 2 and 15 and is excited by a coaxial probe from the two opposite ends to have left and
right-hand CP. Proper element spacing and a square absorber are placed between the resonators to maximize Tx/Rx isolation.
Such a structure provides an in-band full-duplex (IBFD) CP-DRA system. Measurement results exhibit high Tx/Rx isolation
better than 50 dB over the desired operating bandwidth (5.87 to 5.97 GHz) with a peak gain of 5.49 and 5.08 dBic for Ports 1
and 2, respectively.