Title :
A Ku band converter IC
Author :
Kaneko, T. ; Miya, T. ; Yoshida, S.
Author_Institution :
NEC Corp., Tokyo, Japan
Abstract :
A one-chip downconverter IC composed of prescaler, VCO (voltage-controlled oscillator), LNA (low-noise amplifier) mixer, and IF (intermediate frequency) buffer has been developed for DBS (direct broadcast satellite) and CS (communication satellite) applications. This IC was fabricated on a 1.2*2.8 mm/sup 2/ chip. The noise figure was less than 8 dB and the conversion gain was more than 10 dB, and the observed phase noise was -80 dBc/Hz at a 10-kHz offset frequency from a 10.75 GHz requirements. This is the first report of a dynamic 1/12 prescaler operating in the 9 to 12 GHz range, and a multivibrator operating at X-band in a multifunction IC. These successful results made it possible to realize the one-chip VCO downconverter IC, and to directly connect to a conventional silicon prescaler and PLL (phase-locked loop) IC. This IC is promising for miniaturization and cost reduction of CS receivers.<>
Keywords :
MMIC; buffer circuits; direct broadcasting by satellite; frequency convertors; microwave amplifiers; microwave oscillators; mixers (circuits); satellite links; variable-frequency oscillators; 10.75 GHz; DBS; IF buffer; LNA; PLL; VCO; communication satellites; conversion gain; downconverter IC; mixer; multifunction IC; multivibrator; noise figure; phase noise; prescaler; Application specific integrated circuits; Artificial satellites; Frequency; Low-noise amplifiers; Mixers; Noise figure; Phase locked loops; Phase noise; Satellite broadcasting; Voltage-controlled oscillators;
Conference_Titel :
Microwave Symposium Digest, 1992., IEEE MTT-S International
Conference_Location :
Albuquerque, NM, USA
Print_ISBN :
0-7803-0611-2
DOI :
10.1109/MWSYM.1992.188010
