Abstract

AbstractA 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 (S21) 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

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