2X8 Multilayer Microstrip Patch Array Antenna for C-Band Radar Micro-SAR

TL;DR

This paper presents a 2x8 multilayer microstrip patch array antenna designed for 5.62 GHz C-band radar MicroSAR, achieving high gain and bandwidth through multilayer structure and foam spacing.

Contribution

The novel multilayer design with foam spacing enhances bandwidth and gain for low-cost radar MicroSAR applications.

Findings

Achieved 17.5 dB simulated gain

Bandwidth of 5 percent

Multilayer structure improves performance

Abstract

A Microstrip patch array antenna has been designed for 5.62 GHz on FR4 substrate having a dielectric constant of 4.4 and thickness is 1.6 mm.The antenna is used to design for use with a low cost imaging radar MicroSAR. The antenna composed of an array having 16 patch elements could achieve the simulated gain of 17.5 dB with a bandwidth of 5 percent.The antenna consists of multilayer structure where two double side copper cladded substrates FR4 are used.The substrates are put in contact with each other and the common copper layer forms ground plane.The patch elements are placed on the top of one of the substrate and feed network is placed back side of the substrate.To increase the bandwidth of the antenna the height of the substrate is increased.The Foam material is placed between the two substrate to increase the height of the antenna.The corporate feed network is used to smoothly transfer the power from main port to the feed of antenna.