Multipolarization antenna design and analysis of on-body communication

Abstract

On‐body communications show highly polarization selectivity in both radio channels and antennas due to the complex body coupling and scattering effects, and full‐space dimension link distribution. To mitigate the polarization variation of on‐body communication links, multipolarization antennas are proposed to adaptively capture the on‐body channel polarization components. In this article, a tri‐polarization antenna design is introduced with its performance evaluated on a simplified three‐layered human chest model including skin, fat, and muscle tissues. The return loss, frequency response, and the radiation pattern of designed antenna are found to be affected by the relative orientation and distance between the antennas and the trunk, indicating the necessity of the antenna emplacement optimization for realistic on‐body communication devices.

Water-Based Reconfigurable Frequency Selective Rasorber With Thermally Tunable Absorption Band

“…The prototype is set in the middle of the measurement platform. Two standard horn antennas (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18), mounted on both ends of the measurement platform for aiming at the center of the prototype, are connected to an Agilent N5245A vector network analyzer (VNA) by using two RF cables. The measured results of the prototype with and without filled water under the normal incidence at room temperature are shown in Fig.10 (a) and (b).…”

“…FSSs can be regarded as a spatial filter which performing a bandpass/bandstop response for electromagnetic wave, and have been widely used as radome, reflectors, and substrates of antennas. The FSSs with bandpass performance are employed in a radome design to suppress mutual interference, enhance radiation performance or reduce the Radar Cross Section (RCS) [2][3][4]. But such radomes based on FSSs usually reflect the out-of-band signals and result in lager RCSs in other directions, so they can barely reduce the mono-static RCS.…”