AESA 레이다의 전자주사각 증가에 따른 모노펄스 특성 변화 분석

박명훈^* ; 김정 ; 이성균 ; 고진용 ; 장재덕

LIG 디펜스&에어로스페이스 M&S팀 수석연구원

Analysis of Monopulse Characteristic Variations with Increasing Electronic Scan Angle in AESA Radars

Myunghoon Park^* ; Jeong Kim ; Sungkyun Lee ; Jinyong Go ; Jaedeok Jang

Chief research engineer, M&S Team, LIG Defense&Aerospace

Correspondence to: *Myunghoon Park 333 Pangyo-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, 13488, Republic of Korea Tel: +82-31-5179-7267 Fax: +82-31-5179-7086 E-mail: pmh604god@gmail.com

초록

AESA(active electronically scanned array) 레이다는 전자주사를 통해 신속한 빔 조향이 가능하지만, 전자주사각 증가에 따라 안테나 패턴과 모노펄스 특성이 변화한다. 본 연구에서는 uniform planar array 기반 AESA 레이다를 대상으로 전자주사각 변화에 따른 sum pattern, difference pattern 및 monopulse ratio 특성을 분석하였다. 전자주사각을 0°부터 60°까지 변화시키며 monopulse ratio 곡선을 생성하고 monopulse slope와 linear region width를 정량적으로 평가하였다. 분석 결과 전자주사각 증가에 따라 half-power beamwidth와 linear region width는 증가한 반면 monopulse slope는 감소하는 경향이 확인되었다. 이러한 결과는 전자주사각 증가가 모노펄스 각도추정 민감도에 영향을 미치며, 향후 전자주사각을 고려한 모노펄스 보정 기법 개발을 위한 기초 자료로 활용될 수 있다.

Abstract

Active electronically scanned array (AESA) radars provide rapid beam steering through electronic scanning; however, their antenna and monopulse characteristics vary with increasing scan angle. The aim of this study was to analyze the sum pattern, difference pattern, and monopulse ratio characteristics of a uniform planar-array-based AESA radar as a function of electronic scan angle. Monopulse ratio curves were generated for scan angles ranging from 0° to 60°, and the monopulse slope and linear region width were quantitatively evaluated. The results show that the half-power beamwidth and linear region width increased with scan angle, whereas the monopulse slope decreased. These findings indicate that increasing scan angle reduces monopulse angle estimation sensitivity despite the expansion of the linear operating region, providing a useful basis for future monopulse compensation techniques.

Keywords:

AESA Radar, Electronic Scan Angle, Monopulse Ratio, Monopulse Slope, Linear Region, Beam Steering

키워드:

AESA 레이다, 전자주사각, 모노펄스 비율, 모노펄스 기울기, 선형구간, 빔 조향

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