Design and realization of 4 way Chebyshev Wilkinson power divider at 3 GHz frequency for 3 dimensional radar application

Abstract

In the radar system, detection of objects with high accuracy is needed. Therefore, a low sidelobe antenna is needed to avoid interference from other detected targets. One method to suppress sidelobe antenna is by using unequal power divider with Chebyshev polynomial excitation coefficients. In this paper, we will discuss about the design and fabrication of Chebyshev Wilkinson power divider for 3 dimensional radar application. This research was conducted through 4 stages, namely design, simulation, fabrication and measurement. This power divider is realized in the form of a microstrip using Rogers R0-4003C (lossy) substrate with a thickness of 1,524 mm and a dielectric constant of 3.55. The simulation and measurement results are met the desired specifications, the operating frequency is at 3 GHz with a bandwidth of 200 MHz, the return loss is less than -10 dB, the insertion loss value is in accordance with Chebyshev, the isolation value of the port is less than -10 dB, and the unbalance phase is smaller than 2.5°.

Design and Development of Mini-Compact Wilkinson Power Divider for X-Band Man-Pack Surveillance Radar

“…[12]. The simplest WPD (1 × 2) consists of two transmission lines with a channel length of λ/4, and uses a resistor component that can increase the high isolation value between the output ports by maintaining the appropriate impedance at all ports [13].…”