A dielectric resonator (DR) based MIMO (Multiple Input Multiple Output) antenna with enhanced isolation is proposed in this letter. The proposed MIMO antenna consists of four hemispherical shaped dielectric resonator (HDR) radiating at 4.9 GHz. The isolation between two consecutive radiators is enhanced by rotating feeding line of one element at an angle of 180 •. The antenna is studied in terms of S-parameters, gain, envelope correlation coefficient (ECC), channel capacity loss (CCL), and diversity gain (DG). All the parameters are found to be within acceptable range. The proposed design is fabricated, and it is found that measured results are in good agreement with simulation.

Abstract-In this paper, a compact, circularly polarized printed monopole antenna is proposed at ISM band (2.4-2.48 GHz) for biotelemetry and implantable applications. The proposed antenna possesses a small dimension (10 × 10 × 0.3 mm 3 ) and simple microstrip feeding structure. The circular polarization is easily achieved by introducing an "L" shape stub at the ground plane in ISM. The simulated 10 dB impedance bandwidth is around 13.87%, and 3 dB AR bandwidth is around 5.3%. The effect of different body phantoms is discussed to evaluate the sensitivity of the proposed antenna. The simulated peak gain of the proposed antenna is about −7.79 dBi across the operating band. The SAR analysis of the antenna configuration has also been studied.