DESIGN OF IBFD BISTATIC MICROSTRIP ANTENNA WITH REDUCE MUTUAL COUPLING USING U-SLOT

Abstract

Microstrip antennas, due to their affordability and simplicity in manufacturing, are widely employed in a variety of applications, and flat design. Occasionally, these antennas need to operate at two distinct frequencies rather than just one. A U slot is carved into the central part of the antenna to create a dual-frequency microstrip. Four insets feed two microstrip patch antennas with a U shape, which this paper uses. Specific measurements are determined using relevant equations. The desired frequencies and substrate properties are initially selected based on the antenna's intended use, particularly for WLAN applications. The dimensions and parameters are calculated, chosen, and tested using CST Microwave Studio software. Parameters such as reflection coefficient, voltage standing wave ratio, impedance at the input, amplification, and distribution of electromagnetic energy in space are evaluated. The results are compared with the target specifications, and adjustments are made to achieve the precise frequencies. Four insets feed U-slot microstrip patch antennas for two antennas are placed face to face, separated by a small distance, and a set of shorting vias are inserted along the two antenna's radiating edge in between the antennas. In this compact layout, top-to-bottom connected vias are used to make the antenna a short-circuited quarter-wave resonator and minimize The mutual engagement involving a pair of antennas is referred to as reciprocal interaction have an isolation of -24.6 dB and -55 dB at 2.4 GHz and 3.5 GHz, correspondingly. The gain of the two antennas in the direction of maximum radiation is 5.19 dBi and 5.42 dBi at 2.4 GHz and 3.5 GHz, correspondingly.