A 2-D Phase-Detecting/Heterodyne-Scanning Retrodirective Array

Abstract

A 2-D retrodirective array based on phase detection and heterodyne scanning is presented. The system integrates two single voltage-controlled oscillator phase-shifting networks that are autonomously controlled via a phase-detecting array and control circuit that eliminates the 4 path loss typical of other retrodirective arrays. Retrodirectivity is reported for angles of 0 , +15 , and 15 at a transmitting frequency of 6.5 GHz.

Novel Dual-Mode Retrodirective Array Using Synthesized Microstrip Lines

“…The Van Atta arrays [2]- [8] and the phase-conjugating arrays (PCAs) [9]- [19] are the most common approaches to fulfill the phase difference reversal condition. Recently, new approaches using phase detection and phase-shifting methods were reported in [20] and [21] to develop novel self-steering arrays as well.…”