Balanced MMIC QPSK modulator with low amplitude and phase errors

Seong Mo Moon, Han Lim Lee, Dong Hwan Shin, In Bok Yom, Moon Que Lee

Research output: Contribution to journalArticlepeer-review

Abstract

A broadband monolithic microwave integrated circuit (MMIC) quadrature phase shift keying (QPSK) modulator with low amplitude and phase errors is proposed. The presented modulator adopts two wideband reflection-type binary BPSK modulators, each consisting of a modified Lange coupler with additional /4 transmission lines, varactor diodes, inductors and resistors. The proposed QPSK modulator is implemented in 0.15 m GaAs low-noise pHEMT process. The measurements show an error vector magnitude and a demodulated I/Q offset <5.8% root-mean-square and 16.1 dB, respectively, from 18 to 26.5 GHz.

Original languageEnglish
Pages (from-to)523-525
Number of pages3
JournalElectronics Letters
Volume50
Issue number7
DOIs
StatePublished - 27 Mar 2014

Fingerprint

Dive into the research topics of 'Balanced MMIC QPSK modulator with low amplitude and phase errors'. Together they form a unique fingerprint.

Cite this