Design and Simulation of Microstrip Branch Line Coupler and Monopulse Comparator for Airborne Radar Applications

Abstract

This paper presents the design and simulation of Microstrip branch line coupler and monopulse comparator at Ku-band frequency for airborne Radar applications and especially for missile applications. The proposed microstrip branch line coupler and comparator are low profile components and they have been designed and simulated using FEKO (Field Electromagnetic Computation) software by taking 2.2 as relative permittivity and RT Duroid 5880 as a substrate material. The microstrip monopulse comparator formed with four branch line couplers and four 90° bends. The monopulse comparator has great significance in missile guidance systems for finding the angular position of the target and it requires more accurate values to guide the missile system. The simulated results obtained are close to the specifications for required application.