3 to 5 GHz quadrature modulator and demodulator using a wideband frequency-doubling phase shifter

Author

Tsukahara, T. ; Yamada, J.

Author_Institution

NTT Telecommun. Energy Labs., Kanagawa, Japan

fYear

2000

fDate

9-9 Feb. 2000

Firstpage

384

Lastpage

385

Abstract

The 5 GHz band was recently exploited globally for multimedia wireless access systems with transmission rates of many tens of Mb/s. The Japanese version, multimedia mobile access communication system (MMAC) includes wireless LAN (W-LAN) based on IEEE 802.11 standard and high-speed public wireless access systems. The 3 to 5 GHz Si-bipolar quadrature modulator and demodulator use a wideband frequency-doubling 90/spl deg/ phase shifter with self-correction of phase errors from the original 90/spl deg/ phase-shift network. At half the carrier frequency. High image rejection, and small phase and amplitude errors are obtained without trimming or tuning.

Keywords

IEEE standards; MMIC phase shifters; bipolar MMIC; demodulators; modulators; multimedia communication; wireless LAN; 3 to 5 GHz; IEEE 802.11 standard; amplitude errors; bipolar IC; carrier frequency; image rejection; mobile access communication system; multimedia wireless access systems; phase errors; phase-shift network; quadrature demodulator; quadrature modulator; self-correction; transmission rates; wideband frequency-doubling phase shifter; wireless LAN; Communication standards; Demodulation; Frequency; Multimedia communication; Multimedia systems; Phase modulation; Phase shifters; Tuning; Wideband; Wireless LAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Circuits Conference, 2000. Digest of Technical Papers. ISSCC. 2000 IEEE International

Conference_Location

San Francisco, CA, USA

ISSN

0193-6530

Print_ISBN

0-7803-5853-8

Type

conf

DOI

10.1109/ISSCC.2000.839826

Filename

839826