Title :
A 60 GHz 256 QAM balanced vector modulator for short range LOS communication applications
Author :
Nam, S. ; Ashtani, A.E. ; Passiopoulos, G. ; Lucyszyn, S. ; Robertson, I.D.
Author_Institution :
Microwave Circuits & Devices Group, King´s Coll., London, UK
Abstract :
An I-Q type vector modulator employing two orthogonal bi-phase amplitude reflection type modulators has been demonstrated which sets a new benchmark for a multilevel direct carrier modulator for digital communications. The 60 GHz modulator uses design techniques and technology capability to reduce hardware complexity in communication applications. The modelling and design of the balanced I-Q vector modulator are reported, followed by the measured performances.
Keywords :
HEMT integrated circuits; digital radio; field effect MIMIC; indoor radio; microwave links; modulators; quadrature amplitude modulation; radio equipment; 256 QAM balanced vector modulator; 60 GHz; AlGaAs-InGaAs; EHF; I-Q type vector modulator; PHEMT process; digital communications; multilevel direct carrier modulator; orthogonal bi-phase amplitude reflection type modulators; short range LOS communication applications; Amplitude modulation; Attenuators; Couplers; Digital modulation; Insertion loss; Parasitic capacitance; Phase modulation; Quadrature amplitude modulation; Quadrature phase shift keying; Reflection;
Conference_Titel :
Radio Frequency Integrated Circuits (RFIC) Symposium, 1998 IEEE
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
0-7803-4439-1
DOI :
10.1109/RFIC.1998.682096
