On-Body Transmission Single-Band Diamond Dipole Antenna with Waveguide Jacket

Abstract

This paper presents the investigation of on-body transmission single-band diamond dipole antenna with three different jackets. The jackets are named as normal jacket, grounding jacket and waveguide jacket. The on-body transmission is measured using two flexible single-band antennas attach to the jackets. A man with the height of 180 cm and 75 kg weight becomes as a model for the real measurement. The measurement is conducted in small space area by using portable network analyzer with flexible network cable. The measurement results show that the best performance for on-body transmission is with waveguide jacket. 10 dB transmission improvement is archived when the antenna is placed above the waveguide jacket compared to the normal jacket. It is found that the transmission of the antenna is also depends on the antenna orientation and further transmission lossess occur when the antennas are placed above the grounding jacket.

A wearable antenna based on fabric materials with circular polarization for Body-centric wireless communications

“…These antennas are maintained flexible therefore they don't prevent the movement of the body. To ensure the flexibility of these antennas, various flexible materials are utilized as essential parts for the design of wearable antennas [10][11][12][13][14][15]. Due to the continuous movement of human body, it is relatively difficult to obtain the appropriate polarization alignment to maintain an acceptable power received by the transceiver [15,16].…”