Abstract
The Federal Communication Commission (FCC) has authorized the use of unlicensed ultra-wide band (UWB) spectrum in the frequency range from 3.1 to 10.6 GHz for a variety of short-range applications, including wireless monitors and printers, camcorders, radar imaging, and personal area networks (PANS). However, the interference between coexisting narrowband channels and UWB signals that share the same spectrum should be avoided by designing UWB antennas with band notch characteristics. This work presents a printed monopole antenna (PMA) with slots of different shapes etched in the radiating element to obtain band rejection in the three coexisting communication bands, i.e., Worldwide Interoperability for Microwave Access (WiMAX), Wireless Local Area Network (WLAN), and International Telecommunication Union (ITU). A rectangular slot is etched to reject the WiMAX band (3.01-3.68 GHz), an upturned C slot stops the WLAN band (5.18-5.73 GHz) while an inverted-U slot halts the ITU frequency band (7.7-8.5 GHz). The proposed antenna occupies a volume of 32 x 30 x 1.6 mm3 and it radiates efficiently (>90%) with a satisfactory gain (>1.95 dBi) in the unnotched UWB frequency range. The simulations are performed in High Frequency System Simulator (HFSS), while the measurements are conducted in antenna measurement facility and found in close agreement with the former.
Highlights
Printed Monopole Antennas (PMAs) have been used in various applications of wireless communication such as radar, cognitive radio, and indoor positioning because of their affordability, wider bandwidth, and design flexibility [1, 2]
There is an issue inherently associated with ultra-wide band (UWB) communications, which is the interference of various narrow communication bands
The design is capable of operating in UWB frequency range which is justified from the Figure 2
Summary
Printed Monopole Antennas (PMAs) have been used in various applications of wireless communication such as radar, cognitive radio, and indoor positioning because of their affordability, wider bandwidth, and design flexibility [1, 2]. High bandwidth and short-range communication is possible through UWB technology which covers a large portion of the radio spectrum [8]. High data rates of approximately 480 Mbps to 1.6 Gbps are achieved with good time domain impulse performance [9]. Due to these advantages, UWB technology has been able to attract interest of the researchers around the globe and the technology has been adopted widely for numerous applications. There is an issue inherently associated with UWB communications, which is the interference of various narrow communication bands. The intent of this paper is to design a novel UWB PMA with notched characteristics
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