Design and Analysis of Microstrip Monopulse Feed for Tracking Radar Application at $\mathbf{3. 5 G H z}$

Automated target detection for radar applications using a microstrip-based monopulse comparator at 3.5. For microwave applications, the comparator's center frequency is 3.5 GHz (<tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\mathrm{S}$</tex>– Band). The comparator consists of a four hybrid couplers, each with a 90° phase shifter, to achieve the monopulse mechanism in the described planer-based monopulse feed. HFSS and 3DEM software are used to simulate and analyze the comparator. At <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\mathbf{3. 5 G H z}$</tex>, the simulation results indicate simulated impedance matching of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$&gt;10 \text{dB}$</tex>. At the comparator's sum port, the maximum phase deviation is 3.2°. Signals from a monopulse radar system are compared using a monopulse comparator. In order to get exact target accurate information, the monopulse comparator examines the signals from various beams (usually azimuth and elevation angles).. The simulated single MC plane show average differential phase at its sum and difference ports <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$-74^{\circ}$</tex> and 34.19° at 3.5 GHz.