Title :
Mirror Image Sawtooth Phase Conjugator Circuit for Retrodirective Antenna Applications
Author :
Buchanan, Neil ; Fusco, Vincent
Author_Institution :
Queen´´s Univ. Belfast, Belfast
fDate :
6/29/1905 12:00:00 AM
Abstract :
A new type of phase conjugating circuit which uses the properties of a linear sawtooth wave and an inverting sample and hold (S&H) circuit in order to produce a phase conjugated output signal is reported. Since the circuit performs phase conjugate action at a low frequency the need for circuit components operating at twice the incoming RF frequency, a requisite for all previous single mixer based circuit solutions is removed. The circuit has been experimentally verified for operation at 960 MHz. Phase conjugation errors of better than plusmn15deg, less than the plusmn24deg needed for unimpaired 4-element retrodirective array operation, were obtained from the configuration.
Keywords :
UHF antennas; antenna arrays; directive antennas; sample and hold circuits; frequency 960 MHz; mirror image sawtooth phase conjugator circuit; retrodirective antenna array application; sample and hold circuit; Antenna arrays; Circuits; Directive antennas; Frequency conversion; Mirrors; Mixers; Phase locked loops; Phased arrays; RF signals; Radio frequency; Phase conjugation; Phase locked loop; Retrodirective antenna array; phase locked loop (PLL); retrodirective antenna array;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2007.904722
