Abstract
This paper proposed a compact ultra-wideband (UWB) antenna (17.5 × 20.5 mm2) with a triple-notch band characteristic to overcome the interference caused by the three narrow frequency bands that coexist within the ultra-wideband frequency ranging from 3.1 to 10.6 GHz as stipulated by the Federal Communication Commission (FCC). Two slots on the radiating patch and a copper trace on the ground plane of the antenna were introduced to reject the WiMAX, WLAN and SHF frequency bands. The dimensions of the slots and copper trace are optimized to achieve the desired band rejections. The compact size of the antenna is in line with the miniaturization requirement of modern wireless communication devices but at the same time is able to support multiple wireless communication services. The simulation result shows that the antenna can function over the UWB frequency range but with band rejections on the WiMAX band (from 3.2 GHz to 3.6 GHz, WLAN band) (from 5.15 GHz to 5.85 GHz) and SHF band (from 7.25 GHz to 8.395 GHz). The proposed antennas are simulated and designed in CST Microwave Studio® software and fabricated on a FR-4 substrate with a relative dielectric constant, er of 4.5, loss tangent, tan δ of 0.019 and thickness, h of 1.6 mm.
Highlights
In 2002, Federal Communication Commission (FCC) in the United States has licensed the ultra-wideband (UWB) frequency spectrum to operate between the frequency range of 3.1 GHz to 10.6 GHz with Effective IsotopicRadiated Power (EIRP) to be less than -41.4 dBm/MHz [1,2]
Various UWB antennas with a notch function have been developed for UWB communication systems, such as cutting diverse structure of the slot-shapes on the ground plane, on the radiating patch or etching Split Rings Resonator (SRR) in the feed line [22,23,24,25,26,27]
The first and second slots are introduced on the radiating patch of the UWB antenna to reject the WiMAX and Wireless Local Area Network (WLAN) frequency bands
Summary
In 2002, Federal Communication Commission (FCC) in the United States has licensed the ultra-wideband (UWB) frequency spectrum to operate between the frequency range of 3.1 GHz to 10.6 GHz with Effective IsotopicRadiated Power (EIRP) to be less than -41.4 dBm/MHz [1,2]. There are other narrowband for other communication applications within the UWB frequency spectrum which are Wireless Interoperability for Microwave Access (WiMAX) between 3.2 GHz to 3.6 GHz, Wireless Local Area Network (WLAN) between 5.15 GHz to 5.85 GHz and SHF bands between 7.27 GHz to 8.395 GHz [14,15,16,17]. Various UWB antennas with a notch function have been developed for UWB communication systems, such as cutting diverse structure of the slot-shapes on the ground plane, on the radiating patch or etching Split Rings Resonator (SRR) in the feed line [22,23,24,25,26,27] These methods are found useful and efficient in generating UWB frequency range and are still applied until now. The challenge is focusing on miniaturising the size of the antenna but at the same time, still able to support multiple frequency requirements of the present wireless communication technology
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