ABSTRACT This paper presents the design and implementation of a high‐gain 1 × 2 active microstrip patch antenna array for sub‐6‐GHz 5G wireless communication applications. Three structures set apart the modified conventional patch design: an octagonal conductive patch embedded in a square frame and a circular ring. This patch shows improvements in critical parameters such as radiation efficiency, gain, impedance matching, directivity, bandwidth, and half‐power beamwidth. With a bandwidth of 200 MHz, an HPBW of 44°, and a radiation efficiency of 82.3%, the measured results show that the suggested passive antenna array may achieve maximum gain and directivity of 6.1 and 7.27 dBi, respectively. The antenna array combines a new coupling‐loss compensation method, an RF amplifier, and a redesigned circular patch construction. With passive components, such as an RF splitter and an RF combiner, the two antenna elements are connected to a common amplifier via 50‐Ω arc transmission coupling lines. The methodology used in its development includes compact antenna geometry, prototype construction of a low‐loss substrate, and experimental verification. Improvements in impedance matching, bandwidth, gain, and radiation efficiency can be achieved by combining amplifier coupling with structural optimization. With a maximum gain of 18.15 dBi, directivity of 19.2 dBi, bandwidth of 320 MHz, HPBW of 73°, and radiation efficiency of 94.7%, the experimental findings show a 99.9% increase in matching efficiency. The excellent radiation characteristics of the active antenna array establish an efficient pathway for advancing fifth‐generation wireless communication systems, such as those used in tablets.
Ahmed A. Al‐Mudhafar (Sun,) studied this question.