Abstract
A compact (20 x 20 mm2 size), coplanar waveguide (CPW) fed, octagonal slotted, dual-band antenna is presented in this paper. The proposed antenna has a simple structure consisting of an octagonal slot, L-shape stub, and a two stepped rectangular patch. The introduction of the L-shaped metallic stubs in the ground plane generates a lower resonance frequency at 2.42 GHz. The proposed antenna is fabricated on a low cost FR4 substrate having thickness of 1.6 mm. The measured impedance bandwidth of the proposed antenna is from 2.40 to 2.46 GHz and 3.2 to 6.2 GHz. It is also shown that the proposed antenna has stable radiation patterns of almost dumb-bell shape in the E-plane and omni-directional shape in the H-plane. The effects of various design parameters on the impedance bandwidth are also studied and presented in detail. The proposed antenna can be used for 3.5/5.5 GHz worldwide interoperability for microwave access (WiMAX), 2.4/5.2/5.8 GHz wireless local area network (WLAN) and 3.1-6.0 GHz Direct-Sequence Code Division Multiple Access (DS-CDMA) / Multi-Band Orthogonal Frequency Division Multiplexing (MB-OFDM) ultra wideband (UWB) applications.
Highlights
In recent years, much attention has been paid towards the development of multi-band antennas with low cost, compact size and ease of fabrication
In [3], a 32 x 16 mm2 size ring monopole antenna with two meander lines was reported for 2.4/5 GHz dual-band operations
The dual frequency operation was achieved by using coplanar waveguide (CPW)-fed antenna with inverted L strip and open ended rectangular ring strip in [10], the overall dimensions of the proposed antenna was 26.5 x 25 mm2 which covers only 2.4 GHz and 5 GHz wireless local area network (WLAN) bands
Summary
Abstract - A compact (20 x 20 mm size), coplanar waveguide (CPW) fed, octagonal slotted, dual-band antenna is presented in this paper. The proposed antenna has a simple structure consisting of an octagonal slot, L-shape stub, and a two stepped rectangular patch. The introduction of the L-shaped metallic stubs in the ground plane generates a lower resonance frequency at 2.42 GHz. The proposed antenna is fabricated on a low cost FR4 substrate having thickness of 1.6 mm. The effects of various design parameters on the impedance bandwidth are studied and presented in detail. The proposed antenna can be used for 3.5/5.5 GHz worldwide interoperability for microwave access (WiMAX), 2.4/5.2/5.8 GHz wireless local area network (WLAN) and 3.1-6.0 GHz Direct-Sequence Code Division Multiple Access (DS-CDMA) / Multi-Band Orthogonal Frequency Division Multiplexing (MBOFDM) ultra wideband (UWB) applications. Index Terms – CPW-fed, DS-CDMA, MB-OFDM, dual-band, slot antenna, WLAN, WiMAX and UWB antenna
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