Error analysis of an analog correlator for polarimetry

被引：5

作者：

Seong, Jin-Taek ^{[1
]}

Kim, Sung-Hyun ^{[2
]}

Kim, Yong-Hoon ^{[3
]}

机构：

[1] Honam Univ, Dept Informat & Commun Engn, 417 Eodeung Daero, Gwangju, South Korea

[2] Natl Secur Res Inst, 1559 Yuseong Daero, Daejeon, South Korea

[3] Gwangju Inst Sci & Technol, Sch Mechn Engn, 123 Cheomdangwagi Ro, Gwangju, South Korea

来源：

IEICE ELECTRONICS EXPRESS | 2018年 / 15卷 / 02期

基金：

新加坡国家研究基金会;

关键词：

analog correlator; polarimetric radiometer; stokes parameters;

D O I：

10.1587/elex.15.20171207

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：

In this letter, we consider a performance evaluation of an analog correlator, and extract Stokes parameters from cross correlation between horizontal and vertical channels of electric fields for a fully polarimetric radiometer. To this end, we develop an analog correlator using 90 degrees and 180 degrees hybrid couplers and square-law detectors. In order for its performance analysis, we derive a closed form of a mathematical representation for Stokes parameters in terms of amplitude and phase responses of both channels, characteristics of hybrid couplers. As a result, the cross correlation of U and V of Stokes parameters is 0.92 and 0.96, respectively. And the maximum return loss of the proposed analog correlator is less than -23 dB for all directions. In addition, the peak-to-peak amplitude response of the proposed analog correlator is 1.9 dB, and for the phase response as 9 degrees. We compare numerical and measured results of I and U of Stokes parameters, and obtain their average errors as 0.4% and 14.9%.

引用

页数：8