Taking Advantage of PHEMT Nonlinear Behavior for RFID Applications

Author

Cabria, L. ; Garcia, J.A. ; Tazon, A. ; Mediavilla, A.

Author_Institution

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

fYear

2006

fDate

30-31 Jan. 2006

Firstpage

42

Lastpage

45

Abstract

This paper presents two frequency converting PHEMT-based active antennas to be used in RFID applications. A proper characterization of the transistor nonlinear behavior revealed the existence of two biasing regions where the response signal, the second harmonic or the IF component, can be generated with maximum conversion gain and phase opposition. This attractive issue has been taken advantage of, to BPSK modulate the response in two approaches: in a frequency doubling active antenna and in a phase conjugating circuit for retrodirective arrays. Aperture coupled patch radiators were designed, to integrate these modulators in low cost, compact and high performance transponders

Keywords

HEMT integrated circuits; UHF frequency convertors; active antennas; aperture antennas; directive antennas; microstrip antennas; radiofrequency identification; transponders; PHEMT; RFID; active antennas; aperture coupled patch radiators; frequency doubling; high electron mobility transistors; phase conjugation; radiofrequency identification; retrodirective arrays; Antenna arrays; Binary phase shift keying; Character generation; Circuits; Frequency conversion; PHEMTs; Phase modulation; Phased arrays; Radiofrequency identification; Signal generators; PHEMT; RFID; active antennas; modulation; nonlinearities; phase conjugation; retrodirective arrays;

fLanguage

English

Publisher

ieee

Conference_Titel

Integrated Nonlinear Microwave and Millimeter-Wave Circuits, 2006 International Workshop on

Conference_Location

Aveiro

Print_ISBN

0-7803-9722-3

Electronic_ISBN

0-7803-9723-1

Type

conf

DOI

10.1109/INMMIC.2006.283504

Filename

4062255