AI Insight
Researchers developed a compact tri-band directional antenna for Wi-Fi 6/6E systems operating at 2.4, 5.2, and 6.0 GHz frequencies. By using reactive loading techniques including capacitive gaps, shorting vias, and meandered sections, they reduced the low-frequency radiator size by approximately 61% while maintaining performance. The prototype antenna achieved measured impedance bandwidths of 20, 90, and 100 MHz with peak gains of 3.1, 5.8, and 6.8 dBi across the three bands respectively.
Why it matters
This design offers a practical solution for next-generation Wi-Fi 6/6E devices requiring multi-band operation in a compact form factor. The single-layer, single-feed architecture simplifies manufacturing while enabling channel-specific wireless communication across the expanded Wi-Fi 6E frequency spectrum.
Understand the Science
by Anh Nguyen-Quang, Hung Tran-Huy, Hung Nguyen-Manh, Muhammad Ikram
A compact single-layer, single-feed tri-band directional antenna is presented for Wi-Fi 6/6E systems. The target bands at 2.4, 5.2, and 6.0 GHz yield a highest-to-lowest frequency ratio of 2.50, making compact integration of the low-band radiator particularly challenging. To address this issue, the 2.4-GHz driven patch is reactively loaded with narrow capacitive gaps, shorting vias, and meandered sections, reducing its resonant length from 33 to 13 mm (approximately 61%). Two proximity-coupled parasitic patches generate the 5.2- and 6.0-GHz resonances. The spatially distinct current paths provide nearly independent control of the three operating bands. A prototype occupying 0.36λ × 0.36λ × 0.012λ, where λ is the free-space wavelength at 2.4 GHz, exhibits measured −10-dB impedance bandwidths of 20, 90, and 100 MHz and peak broadside realized gains of 3.1, 5.8, and 6.8 dBi, respectively. The proposed configuration provides a compact and structurally simple solution for channel-specific Wi-Fi 6/6E links.
Source: A compact single-layer tri-band directional antenna for Wi-Fi 6/6E applications