A printed antenna with a ground plane and electromagnetically coupled feed for 2.45GHz body area networks

Abstract

This paper presents a printed antenna with a full ground plane and electromagnetically coupled feed for body area network devices operating in industrial, scientific, and medical (ISM) band at 2.45 GHz. Performance characteristics along with parametric analysis are presented. Specific absorption rate (SAR) analysis is carried out to investigate its performance for body centric wireless communication. The electromagneticallycoupled feed used is tuned to fill a null in the radiation pattern and to achieve impedance matching. The proposed antenna exhibits wide radiation pattern along the body surface to provide maximum coverage and its narrow width (14mm) makes it suitable for on-body applications.

A Flexible Planar Antenna on Multilayer Rubber Composite for Wearable Devices

“…As a result, one can say that the proposed antenna has lower 1 g average SAR value than the antennas in [5,6,8,9], and smaller dimensions than those in [5,6]. Moreover, the proposed antenna has a broader bandwidth than antennas in [5,6,9] and better radiation efficiency than [19] when it is mounted directly on a human tissue model as a wearable antenna for body-centric communications. Other advantages of the proposed antenna are the low cost and simple fabrication process.…”

“…Different design approaches have been proposed: (i) using metasurfaces [5], including electromagnetic band-gap structures [6], (ii) using artificial magnetic conducting surfaces [7], (iii) high impedance surfaces (HIS) [8] or (iv) antenna with full ground plane [9]. The presence of the metasurface or full ground plane improves antenna performance while decreasing backside radiation.…”

Stub-loaded printed antenna with a ground plane and electromagnetically coupled feed for 2.45GHz body area networks

“…The challenge here is to achieve a wide beamwidth over the body and around, and to make the return loss less sensitive to the distance between the antenna and the human body [2]. Earlier a compact antenna with a full ground plane and electromagnetically coupled feed for body area network devices operating in industrial, scientific, and medical (ISM) band at 2.45 GHz has been reported [3]. It exhibits a radiation pattern that is along the body surface.…”

“…A pair of stubs with a stub width of 1mm and a length 'L' has been tuned to achieve impedance matching. This combination of feed and stub also help to improve null filling as compared to [3]. Each gap (g) between the feed line and rectangular radiating elements is 0.1mm [3].…”

“…This combination of feed and stub also help to improve null filling as compared to [3]. Each gap (g) between the feed line and rectangular radiating elements is 0.1mm [3]. The dielectric constants, conductivity and loss tangent of different body tissues have been considered when modeling the antenna operation near a human body [4].…”