Title :
Frequency multiplication and QPSK modulation with subharmonic injection-locked active antenna
Author :
Zeng, Xinping ; Chen, Zhizhang
Author_Institution :
Dept. of Electr. & Comput. Eng., Dalhousie Univ., Halifax, NS, Canada
Abstract :
A subharmonic injection-locked oscillating antenna, operating simultaneously as a frequency doubler and as a QPSK modulator, is presented. A dual-gate MESFET is used with one of its gates integrated with a PIN diode switch controlled patch antenna and the other gate connected to a low-noise subharmonic stabilising signal. The experimental and simulation results demonstrate the possibility of the simultaneous realization of frequency multiplication by subharmonic injection locking and phase modulation through DC bias and PIN diode switch.
Keywords :
MESFET circuits; active antennas; antenna feeds; frequency multipliers; injection locked oscillators; microstrip antennas; p-i-n diodes; quadrature phase shift keying; DC bias; PIN diode switch; QPSK modulation; active integrated antenna; dual-gate MESFET; frequency doubler; frequency multiplication; injection locked oscillators; low-noise subharmonic stabilising signal; patch antenna; phase modulation; subharmonic injection-locked active antenna; subharmonic injection-locked oscillating antenna; Frequency conversion; Injection-locked oscillators; Microwave FETs; Microwave antennas; Microwave generation; Phase modulation; Power system harmonics; Quadrature phase shift keying; Signal generators; Switches;
Conference_Titel :
Communication Networks and Services Research, 2004. Proceedings. Second Annual Conference on
Print_ISBN :
0-7695-2096-0
DOI :
10.1109/DNSR.2004.1344746
