This paper investigates the use of a phase-conjugating array to mitigate multipath fading in wireless communications. A four-element phaseconjugating array is placed in a multipath environment consisting of two reflectors parallel to the primary signal path. The distance between the interrogator and receiver is varied to produce multipath signals of varying angles of incidence. A comparison between the phase-conjugating array and a conventional fourelement array shows that the phase-conjugating array reduces fading by up to 14 dB, showing that the phaseconjugating array is a viable solution for multipath mitigation.
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.
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