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

被引：7

作者：

Lee, Han Lim ^{[1
]}

Moon, Seong-Mo ^{[2
]}

Lee, Moon-Que ^{[3
]}

Yu, Jong Won ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Elect Engn, Taejon 305701, South Korea

[2] ETRI, RF & Satellite Payload Res Team, Taejon 305700, South Korea

[3] Univ Seoul, Dept Elect & Comp Engn, Seoul 130743, South Korea

来源：

ELECTRONICS LETTERS | 2014年 / 50卷 / 08期

基金：

新加坡国家研究基金会;

关键词：

D O I：

10.1049/el.2013.4147

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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 degrees phase balance in local oscillator signal paths. In addition, a voltage-controlled 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.

引用

页码：617 / +

页数：2

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