Integrated Dual-Band Antenna Array for Application in Nonlinear Junction Detection Device

The paper presents an antenna designed for use in a nonlinear junction detection device. In order to minimize the overall antenna size both receiving and transmitting antenna elements have been integrated into one dual-band structure having separate excitation ports. High isolation between ports is achieved to avoid direct interferences between a transmitter and a receiver. As a transmitting antenna cross-shaped probe-feed patch has been used and as a receiving antenna a 2?2 array of dual-polarized aperture coupled microstrip patches has been proposed. Results of theoretical analysis are presented and agree well with the experimental ones.