volume | PIER Journals

Abstract

A small-sized loop antenna loaded with the series-connected capacitor and inductor for wireless local area network (WLAN) operation is proposed. The main radiator of an L-shaped, loop structure and its small ground were constructed on a single-layered FR4 substrate of thickness 0.8 mm and occupied a miniature size of 5 mm × 20 mm only. It was found that by loading the series-connected capacitor and inductor between the antenna feed port and the loop radiator, the quarter-wavelength loop resonance can be easily excited together with the controllable half-wavelength resonance. The design prototype was able to operate in the 2.4-GHz (2400-2484 MHz) and 5.8-GHz (5725-5825 MHz) WLAN bands. The proposed antenna was simple in structure and yet provided dual-band operation and good radiation performance.

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Dr. Saou-Wen Su