A PHEMT-Based Phase Conjugator for Full-Duplex Retrodirective Arrays

Author

Cabria, Lorena ; García, José A.

Author_Institution

Dept. of Commun. Eng., Univ. of Cantabria, Santander

Volume

18

Issue

5

fYear

2008

fDate

5/1/2008 12:00:00 AM

Firstpage

368

Lastpage

370

Abstract

In this letter, a phase conjugator for full-duplex retrodirective arrays is presented. Properly controlling a PHEMT nonlinear behavior, the modulation of the phase conjugated retransmitted signal is assured without distorting the information contained in the amplified version of the received signal. By means of a balanced architecture, the interrogating and response components are obtained through two mutually isolated output ports, respectively connected to the demodulation unit and the orthogonal feed of the employed aperture coupled patch. Measured results demonstrate the phase conjugator performance in two operating modes: retransmission of a BPSK signal after reception of an amplitude modulated interrogation, or ASK response when the incoming excitation is angularly modulated.

Keywords

amplitude modulation; high electron mobility transistors; phase shift keying; ASK response; BPSK signal; PHEMT; amplitude modulated interrogation; aperture coupled patch; demodulation unit; full-duplex retrodirective arrays; nonlinear behavior; phase conjugator; Mixers; PHEMT; modulation; phase conjugation; retrodirective arrays;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2008.922135

Filename

4497801