Pattern diversity antenna with high‐temperature tolerance for body area networks

Abstract

A high‐temperature tolerant pattern diversity antenna is presented for body wearable applications in hostile conditions. The proposed system consists of a dielectric resonator antenna (DRA) placed at the centre of a slot loop antenna. The combination yields pattern diversity with broadside and endfire radiation patterns from slot loop and DRAs, respectively. The antenna system offers common bandwidth of 4.95% with port isolation of better than 13 dB at 2.4 GHz. The thermal characteristics of antenna have been studied for high‐temperature operation and no discernible change in the radiation behaviour is noted. The antenna undergoes 2% resonant frequency shift when operated at elevated temperature. The antenna diversity has been measured for three on‐body communication channels. The antenna offers 9.5 dB diversity gain in a pure non‐line‐of‐sight channel surrounded by a rich fading environment subjected to the selection combining scheme. The antenna has dimensions of 0.4λo × 0.4λo × 0.1λo.

Design of New Circularly Polarized Wearable Dielectric Resonator Antenna for Off-Body Communication in WBAN Applications

“…A textile-based cylindrical DRA for WLAN application has been reported in [30], the antenna is fed by three different techniques for comparison. A high-temperature tolerant wearable DRA excited by probe for BAN applications has been studied in [31]. A dual-port diversity antenna designed by combination of DRA and a slot loop for BAN applications has been presented in [32].…”

Circularly polarized two‐layer conical DRA based on metamaterial

“…3 Since, in the telecommunication systems, the use of the dielectric resonator antennas (DRA) has become very common and received much attention. 4 Indeed, the DRA has many advantages such as being more compact, 5 stable in the temperature, 5,6 have a high quality factor, low losses due to the absence of metallization in the radiating structure, easy to fabricate and to couple. 7,8 Through the development of new dielectric materials with very low losses and very good electrical and thermal characteristics, we find that the use of dielectric resonators in microwave systems gave a remarkable development.…”