Low-Complexity Single-Layer Dual-Band Microstrip Patch Antenna for WiFi 6/6E Communication Systems

초록

This paper presents a dual-band patch antenna operating at 5.2 and 6.6 GHz for WiFi 6/6E communication systems. Unlike conventional approaches based on higher-order modes or stacked structures, which often lead to larger size and complicated structure, the proposed design employs two closely spaced patches of different sizes printed on the same layer to realize dual-band operation. These patches are capacitively excited through a probe-fed microstrip line located at the center, enabling a single-layer, low-profile, and low-complexity configuration. The optimized antenna occupies an overall size of 0.52 lambda & times; 0.52 lambda & times; 0.03 lambda at the lowest operating frequency of 5.2 GHz. The measured impedance bandwidths are 6.1% (5.12-5.44 GHz) and 4.9% (6.40-6.72 GHz) for the lower and upper bands, respectively. Within these bands, the antenna achieves measured peak gains in the broadside direction of 7.0 and 6.7 dBi, while maintaining stable and desirable radiation characteristics across both operating frequencies. Owing to its compact size and good operating characteristics, the proposed antenna is suitable for WLAN access points, IoT devices, and compact wireless terminals.

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