Summary
International Symposium on Antennas and Propagation
2012
Session Number:4C2
Session:
Number:4C2-3
A Planar Double Inverted-L Antenna Using Short Stub in Slot Line for WLAN Applications
Chao-Shun Yang,
pp.-
Publication Date:2012/10/29
Online ISSN:2188-5079
Summary:
A planar double inverted-L antenna using short stub in slot line for WLAN applications is presented. A mechanism utilizing short stub is designed on the slot line of the 17 mm length (= 0.17 guided wavelength at 2.44 GHz) to satisfy single band IEEE 802.11a, or b/g, or achieving dual band (a/b/g), it can provide three kinds of RF module applications. The radiator and ground plane with slot line of the overall antenna architecture fed with 50 ohms coaxial line are coplanar on the FR4 epoxy substrate. The Radiator of the antenna is planar dual resonators with the size of 2.6 mm�~12 mm (0.04 wavelength�~0.1 wavelength at 2.44 GHz in the air). The radiator can generate dual band. In addition, utilizing shunt slot line and short stub to adjust matching can subject to three kinds of applications, it is also suitable for impedance-variation regulation when antenna is integrated with insulator or plastic shell. Antenna gain at 2440 MHz (short stub on the location = 3 mm in slot line) and 5500MHz (no short stub) are 1 dBi and 3 dBi, that is similar to general low-profile small antenna, and the radiation efficiency at 2440 MHz (short stub on the location = 3 mm in slot line) and 5500 MHz (no short stub) are 50% and 80%, respectively. It can be used for practical applications.