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

fYear

2005

fDate

21-24 Nov. 2005

Firstpage

1

Lastpage

6

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;

fLanguage

English

Publisher

ieee

Conference_Titel

TENCON 2005 2005 IEEE Region 10

Conference_Location

Melbourne, Qld.

Print_ISBN

0-7803-9311-2

Electronic_ISBN

0-7803-9312-0

Type

conf

DOI

10.1109/TENCON.2005.301207

Filename

4085337