A millimeter-wave tapered dielectric rod with two-antenna excitation for same frequency duplex operation

In this paper, 60-GHz dielectric rod¿s excitation techniques are proposed and designed. Two adjacent decoupled patch antennas are used as excitation to the dielectric rod. Each antenna performs either Tx or Rx operation, in such a way simultaneous duplex operation can be done at the same frequency. Dual-sense circular polarization is here employed to realize that duplex wireless communication. The Tx-to-Rx isolation achieves better than 30 dB for the whole 60-GHz ISM frequency band. The axial ratio is maintained below 3 dB, and the antenna gain is more than 9 dBi. Two positional antenna configurations are here proposed for the end-to-end antenna testing, i.e. one configuration is for the one end while another configuration is for the opposite end. This is useful to keep the position of the electronics (behind the antenna) uniform.