Compact Planar Uwb Antenna With Band Notch Characteristics for Wlan and DSRC

Azim, Rezaul; Islam, Mohammad Tariqul

doi:10.2528/pier12090601

Cited by 67 publications

(47 citation statements)

References 38 publications

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“…As the frequency increases, the higher order current modes are excited and patterns become slightly directional. Although the cross polarization level increases and some nulls are observed at higher frequencies due to the diversified electric current distribution, the proposed antenna exhibits stable radiation patterns throughout the operating band and the patterns are similar to that of typical monopole antennas [41,42]. At higher frequencies the patterns resulted from the measurements have some ripples in amplitude due to many reflections into the field between the AUT and reference antenna.…”

Section: Resultsmentioning

confidence: 71%

Design of a Novel Super Wide Band Circular-Hexagonal Fractal Antenna

Ali¹,

Islam²,

Azim³

2013

PIER

Self Cite

100

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Abstract-In this paper, a novel circular-hexagonal Fractal antenna is investigated for super wide band applications. The proposed antenna is made of iterations of a hexagonal slot inside a circular metallic patch with a transmission line. A partial ground plane and asymmetrical patch toward the substrate are used for designing the antenna to achieve a super wide bandwidth ranging from 2.18 GHz to 44.5 GHz with a bandwidth ratio of 20.4 : 1. The impedance bandwidth and gain of the proposed antenna are much better than the recently reported super wideband antennas which make it appropriate for many wireless communications systems such as ISM, Wi-Fi, GPS, Bluetooth, WLAN and UWB. Details of the proposed antenna design are presented and discussed.

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Section: Resultsmentioning

confidence: 71%

Design of a Novel Super Wide Band Circular-Hexagonal Fractal Antenna

Ali¹,

Islam²,

Azim³

2013

PIER

Self Cite

100

View full text Add to dashboard Cite

show abstract

“…These designs have various monopole structures, such as rectangular [2], holly-leaf-shaped [3], semi-circle [4], triangular [11], two step tapered [14], etc. and circular disc [15] monopole antennas. Some of these UWB antennas do not have simple structure (i.e., the radiators is etched on a substrate and placed vertically 0.5 mm above the ground plane [16]) and are not suitable to be integrated with associated UWB electronics.…”

Section: Introductionmentioning

confidence: 99%

A Compact Inductively Loaded Monopole Antenna for Future Uwb Applications

Gong¹,

Li²,

Zheng³

et al. 2013

PIER

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Abstract-A novel inductively loaded monopole for future ultra-wideband (UWB) applications is presented. The antenna is compact and of small size (16 mm × 20 mm × 0.8 mm), and offer a very simple geometry suitable for low cost fabrication and straight forward printed circuit board integration. More specifically, the impedance matching of the classic printed inductively loaded monopole is improved by employment of the tapered microstrip feed line between K-connector and the printed monopole. By using this technique, impedance bandwidth (S 11 < −10 dB) from 3.03 GHz to over 40 GHz is obtained. Measured and simulated return loss curves are provided along with radiation patterns and gains, as a function of frequency. Compared to the recently reported UWB antennas, the presented antenna have smallest size, widest bandwidth, and simple configuration to realize the application in UWB communication systems. Furthermore, symmetric radiation patterns and satisfactory gains make the presented antenna a suitable candidate for practical UWB applications.

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“…Recently, a lot of UWB monopole antennas with single or multiple notch frequencies to avoid this interference have been introduced. The band-notch characteristics can be achieved through various slots or slits in the radiating patch [5][6][7][8][9][10][11], slots in the feed line [12][13][14][15], slots in the ground plane [16][17][18][19], or using parasitic patches [20][21][22][23][24][25][26]. However, these antennas have fixed band-notch characteristics, and in the cases that there is no interference, they are unable to utilize all the UWB frequency range.…”

Section: Introductionmentioning

confidence: 99%

New Simple Flower Shaped Reconfigurable Band-Notched Uwb Antenna Using Single Varactor Diode

Mohamed¹,

Elkorany²,

Saad³

et al. 2017

PIER C

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Abstract-In this paper, a new flower-shaped microstrip line feed reconfigurable band-notched UWB monopole antenna using single varactor diode is introduced and fabricated. Different notch frequencies can be obtained using different capacitance values. The effect of changing the varactor position is also examined. The flower shape is first optimized to obtain UWB characteristics. Then, a slot is made in the microstrip line to be loaded later with a single varactor diode. A wide range of notch frequencies can be obtained using this simple configuration which covers most of the narrow band coexistence systems. The notch frequency can be lower by increasing the capacitance value. The notch frequency covers the WLAN band when C = 0.8 pF and covers the WiMAX band when the capacitance is changed to 0.7 pF for the same antenna configuration and varactor position. Two prototypes of the proposed antenna using two different single capacitor elements with capacitances 0.6 pF and 1.5 pF are fabricated, and their reflection characteristics are measured and compared with the simulated ones. Notch frequencies at 6.1 GHz and 4.3 GHz are obtained respectively in both simulated and measured antenna structures. The proposed antenna has a directive radiation pattern in E-plane and omnidirectional pattern in Hplane. Also, the gain is suppressed in the notched frequencies. The group delay is nearly stable in the UWB frequency range with very little variations, but it is distorted sharply at the notch frequencies. So, the proposed antenna is a good candidate for the modern UWB systems.

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Compact Planar Uwb Antenna With Band Notch Characteristics for Wlan and DSRC

Cited by 67 publications

References 38 publications

Design of a Novel Super Wide Band Circular-Hexagonal Fractal Antenna

Design of a Novel Super Wide Band Circular-Hexagonal Fractal Antenna

A Compact Inductively Loaded Monopole Antenna for Future Uwb Applications

New Simple Flower Shaped Reconfigurable Band-Notched Uwb Antenna Using Single Varactor Diode

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