Abstract: The performance and advantages of microstrip patch antennas such as low weight, low profile, and low cost made them the perfect choice for communication systems engineers. They have the capability to integrate with microwave circuits and therefore they are very well suited for applications such as cell devices, WLAN, navigation systems and many others.

Antenna arrays are widely used in various applications due to their ability to enhance system performance by providing increased gain, directivity, and beam shaping capabilities. This study specifically examines a variety of microstrip patch antenna arrays that resonate at 3.1GHz, utilizing an FR-4 Epoxy substrate with a dielectric constant of 4.4 and a height of 1.6mm.

Generally, the spacing between antenna elements is kept lambda/2, in this project we analyzed that effect of increasing the number of elements maintaining array size same, on the parameters of array, like radiation pattern, gain, return loss and directivity. The design and analysis of the array are carried out using numerical electromagnetic simulation tool HFSS.

Keywords: Microstrip Patch, Radiation Pattern, VSWR, Gain.

| DOI: 10.17148/IARJSET.2023.10730