Hybrid of monopole and dipole antennas for concurrent 2.4- and 5-GHz WLAN access point

✍ Scribed by Jui-Hung Chou; Saou-Wen Su

• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 454 KB
• Volume: 51
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/mop.24281

✦ Synopsis

Abstract

A novel hybrid of a 2.4‐GHz monopole antenna and a 5‐GHz dipole antenna is presented to provide concurrent 2.4 and 5 GHz band operation for access‐point applications. The two antennas are arranged in a collinear structure and printed on a compact dielectric substrate with dimensions 12 mm × 60 mm. The monopole antenna has a meandered radiating strip and is short‐circuited to a small ground plane through a shorting strip. The dipole antenna includes two sub‐dipoles at the opposite side of a narrow ground plane and fed by a simple T‐junction microstrip‐line network. The two antennas are closely set with a distance of 1 mm only, yet good port isolation (S~21~) well below −20 dB can be obtained. With a low profile, the proposed design can easily fit into the casing of some standard access points and allow the 2.4 and 5 GHz band signals to be simultaneously received or transmitted with no external diplexer required. Good omnidirectional radiation has been observed too. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1206–1209, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24281