Title :
A High-Performed Sub-Harmonic Self-Oscillating Mixer for Modern Wireless Communication System
Author :
Chiu, L. ; Yum, T.Y. ; Xue, Q. ; Chan, C.H.
Author_Institution :
Wireless Commun. Res. Center, City Univ. of Hong Kong, Hong Kong
Abstract :
A high-performance X-band sub-harmonic self- oscillating mixer (SOM) is proposed. By using a re-configurable transistor pair in conjunction with an open and a short circuit stubs, the proposed SOM is capable of down converting four RF frequency bands with center frequencies at 7.35, 8.65, 11.35 and 12.65 GHz with a conversion gain ranging from 7.83 to 18.7 dB with very high power-added-efficiency. The measured phase noise of the free-running oscillation is -85.4 dBc/Hz at an offset frequency of 100-kHz. With injection locking, the phase noise is reduced to less than -100dBc/Hz at 10-kHz, without affecting the conversion gains. This is the first demonstration of a multi-band sub-harmonic SOM.
Keywords :
injection locked oscillators; microwave mixers; phase noise; radiocommunication; RF frequency bands; X-band mixer; conversion gain; frequency 11.35 GHz; frequency 12.65 GHz; frequency 7.35 GHz; frequency 8.65 GHz; gain 7.83 dB to 18.7 dB; high power-added-efficiency; injection locked self-oscillating mixer; offset frequency; open circuit stubs; phase noise; reconfigurable transistor pair; short circuit stubs; subharmonic self-oscillating mixer; wireless communication system; Frequency conversion; Frequency measurement; Mixers; Noise measurement; Oscillators; Phase measurement; Phase noise; Radio frequency; VHF circuits; Wireless communication;
Conference_Titel :
TENCON 2005 2005 IEEE Region 10
Conference_Location :
Melbourne, Qld.
Print_ISBN :
0-7803-9311-2
Electronic_ISBN :
0-7803-9312-0
DOI :
10.1109/TENCON.2005.301207
