Title :
A balanced vector modulator for LMDS applications
Author :
Ng, C.Y. ; Chongcheawchamnan, M. ; Robertson, I.D.
Author_Institution :
Sch. of Electron., Comput. & Math., Surrey Univ., Guildford, UK
Abstract :
The design and performance of a monolithic microwave I-Q type vector modulator operating at 26 GHz is presented. The MMIC chip which measures 1.75 mm × 2.1 mm, employs direct carrier modulation to reduce hardware complexity and cost. The static constellation was obtained with swept bias voltage control, with this, modulation of 16-quadrature amplitude modulation (QAM) is demonstrated. Baseband input levels were applied at 2.5 MSample/s, by an arbitrary waveform generator to demonstrate a 10 Mbits/s data rate transmitter operating at 26 GHz
Keywords :
MMIC; data communication equipment; modulators; quadrature amplitude modulation; radio access networks; 10 Mbit/s; 10 Mbits/s; 16-quadrature amplitude modulation; 26 GHz; MMIC chip; QAM; complexity; cost; direct carrier modulation; monolithic microwave I-Q vector modulator; swept bias voltage control; waveform generator; Amplitude modulation; Baseband; Costs; Hardware; MMICs; Quadrature amplitude modulation; Semiconductor device measurement; Signal generators; Transmitters; Voltage control;
Conference_Titel :
High Frequency Postgraduate Student Colloquium, 2001. 6th IEEE
Conference_Location :
Cardiff
Print_ISBN :
0-7803-7118-6
DOI :
10.1109/HFPSC.2001.962188
