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A CPW-fed circular wide-slot UWB antenna with wide tunable and flexible reconfigurable dual notch bands.

Li Y, Li W, Ye Q - ScientificWorldJournal (2013)

Bottom Line: A coplanar waveguide (CPW)-fed circular slot antenna with wide tunable dual band-notched function and frequency reconfigurable characteristic is designed, and its performance is verified experimentally for ultra-wideband (UWB) communication applications.The notch band reconfigurable characteristic is realized by integrating three switches into the T-SIR and the PSLR.The numerical and experimental results show that the proposed antenna has a wide bandwidth ranging from 2.7 GHz to 12 GHz with voltage standing wave ratio (VSWR) less than 2, except for the two notch bands operating at 3.8-5.9 GHz and 7.7-9.2 GHz, respectively.

View Article: PubMed Central - PubMed

Affiliation: College of Information and Communications Engineering, Harbin Engineering University, Harbin, Heilongjiang 150001, China.

ABSTRACT
A coplanar waveguide (CPW)-fed circular slot antenna with wide tunable dual band-notched function and frequency reconfigurable characteristic is designed, and its performance is verified experimentally for ultra-wideband (UWB) communication applications. The dual band-notched function is achieved by using a T-shaped stepped impedance resonator (T-SIR) inserted inside the circular ring radiation patch and by etching a parallel stub loaded resonator (PSLR) in the CPW transmission line, while the wide tunable bands can be implemented by adjusting the dimensions of the T-SIR and the PSLR. The notch band reconfigurable characteristic is realized by integrating three switches into the T-SIR and the PSLR. The numerical and experimental results show that the proposed antenna has a wide bandwidth ranging from 2.7 GHz to 12 GHz with voltage standing wave ratio (VSWR) less than 2, except for the two notch bands operating at 3.8-5.9 GHz and 7.7-9.2 GHz, respectively. In addition, the proposed antenna has been optimized to a compact size and can provide omnidirectional radiation patterns, which are suitable for UWB communication applications.

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Design evolution and geometry of the proposed antenna.
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fig1: Design evolution and geometry of the proposed antenna.

Mentions: Procedures of designing the proposed reconfigurable dual band-notched UWB antenna are shown in Figure 1. First, a UWB antenna without T-SIR and PLSR is illustrated in Figure 1(a) and is denoted as antenna-1. This antenna is comprised of a circular ring radiating element, a circular slot etched in the CPW ground plane, and a CPW ground plane together with the 50 Ohm CPW-fed structure. In the design, a substrate with a relative dielectric constant of 2.65 and thickness of 1.5 mm is employed. The 50 Ohm CPW feed structure consists of a transmission line with a width of W6 = 3.6 mm, and the gap between the transmission line and the ground plane is g = 0.2 mm. To implement the band-notched characteristic, two UWB antennas with single notch band are designed by using the T-SIR or the PSLR, shown in Figures 1(b) and 1(c), respectively. In Figure 1(b), the T-SIR is inserted inside the circular ring of antenna-1 to form one of the single band-notched antennas which is noted as antenna-2. Figure 1(c) shows the other single band-notched UWB antenna with the PSLR etched in the CPW transmission line, which is defined as antenna-3.


A CPW-fed circular wide-slot UWB antenna with wide tunable and flexible reconfigurable dual notch bands.

Li Y, Li W, Ye Q - ScientificWorldJournal (2013)

Design evolution and geometry of the proposed antenna.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3814091&req=5

fig1: Design evolution and geometry of the proposed antenna.
Mentions: Procedures of designing the proposed reconfigurable dual band-notched UWB antenna are shown in Figure 1. First, a UWB antenna without T-SIR and PLSR is illustrated in Figure 1(a) and is denoted as antenna-1. This antenna is comprised of a circular ring radiating element, a circular slot etched in the CPW ground plane, and a CPW ground plane together with the 50 Ohm CPW-fed structure. In the design, a substrate with a relative dielectric constant of 2.65 and thickness of 1.5 mm is employed. The 50 Ohm CPW feed structure consists of a transmission line with a width of W6 = 3.6 mm, and the gap between the transmission line and the ground plane is g = 0.2 mm. To implement the band-notched characteristic, two UWB antennas with single notch band are designed by using the T-SIR or the PSLR, shown in Figures 1(b) and 1(c), respectively. In Figure 1(b), the T-SIR is inserted inside the circular ring of antenna-1 to form one of the single band-notched antennas which is noted as antenna-2. Figure 1(c) shows the other single band-notched UWB antenna with the PSLR etched in the CPW transmission line, which is defined as antenna-3.

Bottom Line: A coplanar waveguide (CPW)-fed circular slot antenna with wide tunable dual band-notched function and frequency reconfigurable characteristic is designed, and its performance is verified experimentally for ultra-wideband (UWB) communication applications.The notch band reconfigurable characteristic is realized by integrating three switches into the T-SIR and the PSLR.The numerical and experimental results show that the proposed antenna has a wide bandwidth ranging from 2.7 GHz to 12 GHz with voltage standing wave ratio (VSWR) less than 2, except for the two notch bands operating at 3.8-5.9 GHz and 7.7-9.2 GHz, respectively.

View Article: PubMed Central - PubMed

Affiliation: College of Information and Communications Engineering, Harbin Engineering University, Harbin, Heilongjiang 150001, China.

ABSTRACT
A coplanar waveguide (CPW)-fed circular slot antenna with wide tunable dual band-notched function and frequency reconfigurable characteristic is designed, and its performance is verified experimentally for ultra-wideband (UWB) communication applications. The dual band-notched function is achieved by using a T-shaped stepped impedance resonator (T-SIR) inserted inside the circular ring radiation patch and by etching a parallel stub loaded resonator (PSLR) in the CPW transmission line, while the wide tunable bands can be implemented by adjusting the dimensions of the T-SIR and the PSLR. The notch band reconfigurable characteristic is realized by integrating three switches into the T-SIR and the PSLR. The numerical and experimental results show that the proposed antenna has a wide bandwidth ranging from 2.7 GHz to 12 GHz with voltage standing wave ratio (VSWR) less than 2, except for the two notch bands operating at 3.8-5.9 GHz and 7.7-9.2 GHz, respectively. In addition, the proposed antenna has been optimized to a compact size and can provide omnidirectional radiation patterns, which are suitable for UWB communication applications.

Show MeSH
Related in: MedlinePlus