Omnidirectional Cylindrical Dielectric Resonator Antenna for Off & On Body Communications

An innovative millimetre wave (mmWave) cylindrical dielectric resonator antenna (DRA) for off/on-body communication is presented. The proposed antenna offers broadside and omnidirectional patterns at two different frequency bands and make use of a planar feed network. The omnidirectional radiation has been achieved with a gain of 4.53 dBi and an impedance bandwidth of 2.1% by exciting the HEM
21δ
omnidirectional mode at 25.5 GHz. In addition, the HEM
111
fundamental mode has been excited to provide broadside radiation at 21.5 GHz. This dual-band performance was confirmed by measurements, exhibiting high agreement with simulations. Therefore, the proposed configuration is flexible and suitable for both on-body and off-body communications.