Dual-Band Directional Slot Antenna for Wi-Fi Application


A directional slot antenna with a squared arch structure for Wi-Fi applications is proposed in this communication. In general, one antenna can hardly obtain a nonsplitting and relatively consistent radiation beam in both the 2.4 and 5 GHz bands. A relatively consistent horizontal beamwidth in the dual bands is desired to maintain the same sector signal coverage and avoid interfering with adjacent sectors to maximize the data transmission in usage scenarios such as a sports stadium and warehouse. With a squared arch design, the proposed slot antenna can keep the H-plane beamwidth relatively the same in the dual bands. The slot antenna achieves good matching in both the 2.4 (2.4-2.5 GHz) and 5 GHz (4.9-5.9 GHz) bands, and good vertical polarization. An expression describing the condition of generating a nonsplitting beam is derived as a function of the source spacing, and can be used to guide the arch design. Finally, the proposed slot antenna with the squared arch structure is validated by both simulations and measurements of a prototype.


Electrical and Computer Engineering

Research Center/Lab(s)

Electromagnetic Compatibility (EMC) Laboratory

Keywords and Phrases

Antenna arrays; Antenna lobes; Arches; Directional patterns (antenna); Directive antennas; Slot antennas; Wi-Fi; Wireless local area networks (WLAN); Directional; Dual Band; Equivalent array with adjustable source spacing; Low side lobes; Non-splitting beam; Wireless fidelities; Microwave antennas; Consistent beamwidth in dual bands; nonsplitting beam; Pleated structure; Squared arch; Wi-Fi

International Standard Serial Number (ISSN)

0018-926X; 1558-2221

Document Type

Article - Journal

Document Version


File Type





© 2018 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Aug 2018