Educational Model For E And H Patch Octet Antenna Designed Gain Improvement

Abstract

The enhancement of directivity and gain remains a critical area of research in the design of antenna arrays. This study presents the design and analysis of highly directive E- octate (E-O) and H-octate (H-O) rectangular micro-strip patch antenna arrays (MSPAA) aimed to improve the gain performance at a frequency of 2.4 GHz. The proposed antenna arrays were optimized to attain maximum directivity and gain by carefully adjusting element spacing and substrate dielectric properties. The performance of these arrays was evaluated through electromagnetic simulations, with particular emphasis on radiation patterns, return loss, and impedance matching. The E-O-MSPAA design with optimized spacing has achieved a maximum directivity of 17.7 dBi, which represents an improvement of 3.7 dBi over the original validated E-O-MSPAA design. In comparison, the H-O-MSPAA design outperformed E-O-MSPAA, attaining a directivity of 18.4 dBi along with a narrower beam width. An analysis of return loss indicates a trade-off between bandwidth and minimum return loss for both antenna types. The E-O-MSPAA design exhibits a wider bandwidth with an acceptable return loss, while the H-O-MSPAA features a narrower bandwidth but demonstrates a lower return loss at resonant frequency. In addition, evaluation of active impedance matching reveals that the H-O-MSPAA at higher bandwidth maintains relatively stable impedance characteristics. The proposed optimized E-O-MSPAA design outperforms previous state-of-the-art octet antenna array designs, increasing performance by 3.5 dBi over slotted designs and 0.22 dBi over T-slotted patch designs. These findings highlight the potential of the proposed arrays for applications requiring high directivity and gain, such as satellite communication systems.