Microstrip patch antenna array at 3.8 GHz for WiMax and UAV applications

Abstract

This paper presents the design of a rectangular microstrip line-fed patch antenna array with a centre frequency of 3.8 GHz for WiMAX and Unmanned Air Vehicle (UAV) applications. A single element, 1x2 and 2x2 microstrip rectangular patch antennas were designed and simulated in Computer Simulation Tool (CST) Microwave Studio environment. The results of designed antennas were compared in terms of Return Loss (S11 parameters), bandwidth, directivity, gain and radiation pattern. Compared to traditional microstrip antennas the proposed array structure achieved a gain and directivity of 13.2 dB and 13.5 dBi respectively. The antenna was fabricated using Rogers Duroid RT-5880 substrate with a dielectric constant r of 2.2 and a thickness of 1.574 mm respectively. The array antennas were measured in the laboratory using Vector Network Analyser (VNA) and the results show good agreement with the array antenna simulation.

Design and Performance Analysis of Different Dielectric Substrate based Microstrip Patch Antenna for 5G Applications

“…The two key factors that have to be considered when deciding on the antenna substrate are thickness and relative permittivity. These two factors play a vital role in influencing the performance of the antenna [10][11][12][13][14][15]. Several authors have previously used the FR-4 substrate to design the 3.5 GHz patch antennas.…”

“…With regards to the antenna bandwidth, the antenna designed in [10] had a bandwidth of 300 MHz while the antenna in [11] had a bandwidth of 360 MHz. Based on [12][13], the authors have designed a rectangular patch antenna using RT-5880 as the substrate with a thickness 1.574 mm and 1.57 mm respectively. At 3.8 GHz, the bandwidth of the antenna was 72 MHz [12] and the bandwidth was 50 MHz [13] at 2.5 GHz.…”

“…Based on [12][13], the authors have designed a rectangular patch antenna using RT-5880 as the substrate with a thickness 1.574 mm and 1.57 mm respectively. At 3.8 GHz, the bandwidth of the antenna was 72 MHz [12] and the bandwidth was 50 MHz [13] at 2.5 GHz. The gains achieved in [12] and [13] were 13.2 dB and 5.51 dB respectively.…”

Enhanced Gain Microstrip Patch Antenna for Wimax Applications

“…A small change in any dimensions can cause a noticeable change in the results eg.frequency,impedance matching, bandwidth,directivity and gain etc. [1] II.…”

2.4GHz patch antenna arrays suitable for Remotely Piloted Aircraft Systems

“…Many antennas designed for RPAS have been proposed providing different radiation characteristics, operation frequencies and bandwidth. In [2] a 1x2 and a 2x2 microstrip patch array are designed, operating at 3.8GHz for RPAS applications based on RT-Duroid 5880 substrate. Gain is estimated to be 9.4dB with 1.63% bandwidth for the 1x2 array and 13.2dB and 1.84% bandwidth for the 2x2 array.…”