Abstract
A novel hammer-shaped UWB printed antenna with triple notched stop bands is presented and fabricated on FR-4 substrate with size of 40×40×1.6 mm3. The proposed antenna is composed of hammer-shaped patch with C-shaped slot, U-shaped slot on feed line, and inverted stepped notch and bevel edges with pair of L-shaped slots in partial ground plane. The fabricated antenna is tested and obtained impedance bandwidth 2.89 ̶ 11.6 GHz with three notched stop bands 3.15 ̶ 3.7 GHz, 5.45 ̶ 6.8 GHz, and 7.5 ̶ 8.8 GHz, for radiolocation system (RLS), wireless local area networks (WLAN), and X-band satellite communication system (XSCS) bands, respectively. Moreover, the antenna result shows omnidirectional radiation pattern, average gain of 3.10 dBi over the whole UWB band except at the notched frequency bands.
Highlights
Ultra-wideband (UWB) spectrum 3.1-10.6 GHz was allowed by US Federal Communications Commission (FCC) for commercial communication application in 2002 [1]
The triple notched stop bands are achieved by etching a Cshaped slot on the patch for radiolocation system (RLS) band, a pair of L-shaped slot in partial ground plane for wireless local area network (WLAN) band, and U-shaped slot on feed line for X-band satellite communication system (XSCS) band
For simplicity total length length of slot (Lslot)-A, Lslot-B, and Lslot-C of each slot A, B, and C are varied and its variation on voltage standing wave ratio (VSWR) is plotted in Fig. 7 (a), (b), and (c), respectively
Summary
Ultra-wideband (UWB) spectrum 3.1-10.6 GHz was allowed by US Federal Communications Commission (FCC) for commercial communication application in 2002 [1]. UWB antenna is desirable which presents attractive features such as small size, simple structure, omnidirectional pattern stability, and low fabrication cost. Due to these features UWB antenna is an active research topic in recent years for academia and industry people. A novel hammer-shaped UWB printed antenna with triple notched stop bands is presented. The triple notched stop bands are achieved by etching a Cshaped slot on the patch for RLS band, a pair of L-shaped slot in partial ground plane for WLAN band, and U-shaped slot on feed line for XSCS band. Step by step antenna design process, frequency band suppression methodology, experimental results, and conclusion are presented in section 2, 3, 4, and 5, respectively
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