DocumentCode :
1195689
Title :
A PHEMT frequency doubling active antenna with BPSK modulation capability
Author :
Cabria, L. ; García, J.A. ; Malaver, E. ; Tazón, A.
Author_Institution :
Dept. of Commun. Eng., Cantabria Univ., Santander, Spain
Volume :
3
Issue :
1
fYear :
2004
Firstpage :
310
Lastpage :
313
Abstract :
The letter presents a novel frequency doubling active antenna, based on a PHEMT device, with BPSK modulation capability. A dedicated nonlinear transistor characterization reveals the existence of two biasing regions, where the second harmonic could be generated with maximum level and phase opposition. Taking advantage of this issue, a low frequency data signal applied to the gate terminal may be used to create a BPSK modulated signal, centered at twice the carrier frequency. An adequate integration of this modulator in a dual-frequency and dual-polarization slot coupled patch, results in a compact and high performance solution. In order to characterize the integrated active radiating structure, a specific test setup was implemented in an anechoic chamber, reproducing a sort of RFID architecture.
Keywords :
HEMT circuits; active antennas; antenna feeds; electromagnetic wave polarisation; frequency multipliers; microstrip antennas; multifrequency antennas; phase shift keying; radiofrequency identification; BPSK modulation; PHEMT active antenna; RFID architecture; dual-frequency antenna; dual-polarization antenna; frequency doubling active antenna; level opposition; nonlinear transistor characterization; phase opposition; radio frequency identification; second harmonic generation; slot coupled patch antenna;
fLanguage :
English
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
Publisher :
ieee
ISSN :
1536-1225
Type :
jour
DOI :
10.1109/LAWP.2004.838821
Filename :
1373961
Link To Document :
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