Abstract
A novel multislot antenna with a conducting backplane reflector (MSA-BP) designed for ultrawideband wireless body area networks (WBANs) applications is presented. The objective is to achieve a desensitization of the antenna behavior regarding the proximity effects of the human body, thanks to the field screening operated by the backplane. Partly because of the latter, the antenna is fed with a tapered CPW. The influence of antenna parameters and human body proximity on the radiation characteristics of the MSA-BP is analyzed. Simulated results of the antenna close to a three-layer arm phantom are presented. Impedance and radiation measurements of the isolated antenna as well as propagation characteristics along the human body demonstrating the desensitization effect are also presented. The characteristics of the MSA-BP, in terms of the on-body total radiation efficiency, are significantly improved compared to any (quasi-) omnidirectional counterpart.
Highlights
Wireless body area networks (WBANs) are systems of wireless communication between wearable or implantable electronic devices
The paper is organized as follows: in Section 2, the antenna design is detailed with a parametric analysis; in Section 3 the main characteristics of the multislot antenna with a conducting backplane reflector (MSA-BP), namely, the input matching, radiation characteristics, and efficiency, both in free space and in the vicinity of the human body are presented; the on-body propagation performance between two MSA-BPs placed on an arm phantom are numerically studied and compared with measurements with a human subject in an anechoic chamber
These results are compared with those of another MSA design without backplane in order to demonstrate the benefits of the MSABP, in particular with regards to the significant improvement of the channel path loss (PL) along a human arm
Summary
Wireless body area networks (WBANs) are systems of wireless communication between wearable or implantable electronic devices (and possibly an off-body access point). The paper is organized as follows: in Section 2, the antenna design is detailed with a parametric analysis; in Section 3 the main characteristics of the MSA-BP, namely, the input matching, radiation characteristics, and efficiency, both in free space and in the vicinity of the human body are presented; the on-body propagation performance between two MSA-BPs placed on an arm phantom are numerically studied and compared with measurements with a human subject in an anechoic chamber These results are compared with those of another MSA design without backplane in order to demonstrate the benefits of the MSABP, in particular with regards to the significant improvement (about 15 dB) of the channel path loss (PL) along a human arm
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