Signal propagation analysis for near-field intra-body communication systems

This article presents and discusses some of the recent developments on 60 GHz antenna arrays in substrate integrated waveguide (SIW) technology. They include planar linearly polarized (LP) antenna, three dimensional (3-D) high gain LP antenna, multi-layer single circularly polarized (CP) antenna, and 3-D dual circularly polarized antenna (DCP) over 60 GHz frequency range. Single LP antenna is realized by loading antipodal linearly tapered slot antenna (ALTSA) with dielectric rod antenna. The dielectric rod antenna is used as a radiating element to construct 4 × 4 antenna array. Single right-hand circularly polarized (RHCP) antenna is constructed by using SIW as feeding network and CP patch as radiating element. 2 × 2 RHCP array makes use of an aperture coupling method to excite each antenna element. In the final prototype, DCP antenna is constructed by using multi-layer E-plane coupler and rod radiating element. All the proposed antenna arrays are experimentally validated and compared with the simulated counterparts.