Conjugador de fase EER para sistemas retrodirectivos

Abstract

A simple retrodirective solution based on a heterodyne technique, without requiring a complex local oscillator (LO) distribution network, is presented in this paper. The system employs the TM₂₀ mode of an orthogonal dual-feed square patch to receive a spatially distributed LO, containing the amplitude and phase components of the spectrally efficient wireless modulation format to be automatically retransmitted back to the interrogation position. The core of this solution is a phase conjugator, which employs the Envelope Elimination and Restoration (EER) principle, taking advantage oh the conversion gain modulation capability of drain-controlled active gate mixers.