Six-port QPSK demodulator for optimal K-band multiport amplifier calibration

Han Lim Lee; Seong Mo Moon; Moon Que Lee; Jong Won Yu

doi:10.1049/el.2013.4147

Six-port QPSK demodulator for optimal K-band multiport amplifier calibration

Han Lim Lee, Seong Mo Moon, Moon Que Lee, Jong Won Yu

School of Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

A wideband six-port-based demodulator is proposed and applied as a quadrature phase shift keying (QPSK) demodulator for optimal K-band multiport amplifier (MPA) calibration circuitry. The proposed six-port demodulator adopts wideband ring hybrids for optimal 180° phase balance in local oscillator signal paths. In addition, a voltagecontrolled reflection-type phase shifter and an attenuator are integrated into the six-port structure to ensure accurate magnitude and phase balance over broadband operation, resulting in optimal phase and amplitude error detection for the MPA system. To verify the proposed structure, RF demodulation of the K-band QPSK modulated signal was demonstrated for purpose of MPA calibration.

Original language	English
Pages (from-to)	617-618
Number of pages	2
Journal	Electronics Letters
Volume	50
Issue number	8
DOIs	https://doi.org/10.1049/el.2013.4147
State	Published - 10 Apr 2014

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title = "Six-port QPSK demodulator for optimal K-band multiport amplifier calibration",

abstract = "A wideband six-port-based demodulator is proposed and applied as a quadrature phase shift keying (QPSK) demodulator for optimal K-band multiport amplifier (MPA) calibration circuitry. The proposed six-port demodulator adopts wideband ring hybrids for optimal 180° phase balance in local oscillator signal paths. In addition, a voltagecontrolled reflection-type phase shifter and an attenuator are integrated into the six-port structure to ensure accurate magnitude and phase balance over broadband operation, resulting in optimal phase and amplitude error detection for the MPA system. To verify the proposed structure, RF demodulation of the K-band QPSK modulated signal was demonstrated for purpose of MPA calibration.",

author = "Lee, {Han Lim} and Moon, {Seong Mo} and Lee, {Moon Que} and Yu, {Jong Won}",

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AU - Lee, Han Lim

AU - Moon, Seong Mo

AU - Lee, Moon Que

AU - Yu, Jong Won

PY - 2014/4/10

Y1 - 2014/4/10

N2 - A wideband six-port-based demodulator is proposed and applied as a quadrature phase shift keying (QPSK) demodulator for optimal K-band multiport amplifier (MPA) calibration circuitry. The proposed six-port demodulator adopts wideband ring hybrids for optimal 180° phase balance in local oscillator signal paths. In addition, a voltagecontrolled reflection-type phase shifter and an attenuator are integrated into the six-port structure to ensure accurate magnitude and phase balance over broadband operation, resulting in optimal phase and amplitude error detection for the MPA system. To verify the proposed structure, RF demodulation of the K-band QPSK modulated signal was demonstrated for purpose of MPA calibration.

AB - A wideband six-port-based demodulator is proposed and applied as a quadrature phase shift keying (QPSK) demodulator for optimal K-band multiport amplifier (MPA) calibration circuitry. The proposed six-port demodulator adopts wideband ring hybrids for optimal 180° phase balance in local oscillator signal paths. In addition, a voltagecontrolled reflection-type phase shifter and an attenuator are integrated into the six-port structure to ensure accurate magnitude and phase balance over broadband operation, resulting in optimal phase and amplitude error detection for the MPA system. To verify the proposed structure, RF demodulation of the K-band QPSK modulated signal was demonstrated for purpose of MPA calibration.

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JO - Electronics Letters

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Six-port QPSK demodulator for optimal K-band multiport amplifier calibration

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