Reconfigurable monopole antenna with controllable band-notched performance for UWB communications

Ojaroudi, Nasser; Amiri, Shervin; Geran, F.

doi:10.1109/telfor.2012.6419423

Cited by 41 publications

(37 citation statements)

References 4 publications

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“…The patterns indicate at higher frequencies, more ripples can be observed in both E-and H-planes owing to the generation of higher-order modes. The cross-polarization component also increases at higher frequencies due to the increased horizontal surface currents [15,16].…”

Section: Resultsmentioning

confidence: 99%

Uwb/Omni-Directional Microstrip Monopole Antenna for Microwave Imaging Applications

Ojaroudi¹,

Ojaroudi²,

Ebazadeh³

2014

PIER C

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Abstract-In this paper, a new design of multi-resonance monopole antenna for use in microwave imaging systems is presented. The antenna configuration consists of an ordinary square radiating patch, a feed-line, and a modified ground plane with pairs of L-shaped slits and parasitic structures which provides a wide usable fractional bandwidth of more than 130% (2.95-14.27 GHz). In the presented design, by cutting a pair of L-shaped slits and also by embedding a pair of inverted L-shaped parasitic structures in the ground plane additional resonances at 9.5 GHz and 13.7 GHz can be achieved. By using these structures, the usable upper frequency of the antenna is extended from 10.3 GHz to 14.27 GHz. The proposed antenna has a symmetrical structure with ordinary square radiating patch, therefore displays good omni-directional radiation patterns even at higher frequencies. The antenna has sufficient and acceptable gain level and also its radiation efficiency is greater than 86% across the entire radiating band. The designed antenna has a small dimension.

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Section: Resultsmentioning

confidence: 99%

Uwb/Omni-Directional Microstrip Monopole Antenna for Microwave Imaging Applications

Ojaroudi¹,

Ojaroudi²,

Ebazadeh³

2014

PIER C

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“…The main purpose of the radiation patterns is to demonstrate that the antenna actually radiates over a wide frequency band. It can be seen that the radiation patterns in X-Z plane are nearly omni-directional even at higher frequencies, and also the cross-polarization level is low for the fourth frequencies [13][14][15]. Figure 10 shows the measured maximum gain of the proposed antenna for the WiMAX, WLAN, downlink of X-band satellite communication, and ITU frequencies.…”

Section: Antenna Radiation Characteristicsmentioning

confidence: 99%

Quad-Band Planar Inverted-F Antenna (Pifa) for Wireless Communication Systems

Ojaroudi¹,

Ojaroudi²,

Ghadimi³

2014

PIER Letters

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Abstract-In this paper, a compact quad-band planar inverted-F antenna (PIFA) for wireless communication systems is presented. The proposed PIFA consists of a radiating patch with a hookshaped slot and a modified ground plane with pair of square-ring and rotated I-shaped slots. The antenna is fabricated on an FR4 substrate with dielectric constant of 4.4. By cutting a hook-shaped slit at radiating patch, good dual-band property can be achieved which covers 3.5 GHz worldwide interoperability for microwave access (WiMAX) and 5.2 GHz wireless local area network (WLAN) frequencies. In addition, by using a modified ground plane with a rotated I-shaped an the pair of square-ring slot, additional resonances at the higher frequencies are generated which suitable for 7.25-7.75 GHz downlink of X-band satellite communication systems and 8.02-8.4 GHz international telecommunication union (ITU) applications. Good return loss, antenna gain and radiation pattern characteristics are obtained in the frequency band of interest. The proposed antenna has a small dimension of 24 × 3 × 1.6 mm 3 .

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“…Also, the simulated current distribution at the middle extra resonance frequency (12.5 GHz) is presented in Figure (b). As shown in Figure , the current concentrated on the edges of the interior and exterior of the L‐shaped slots at 11 and 16.7 GHz and concentrated on the edges of the interior and exterior of the L‐shaped parasitic structures at 12.5 GHz .…”

Section: Resultsmentioning

confidence: 94%

Compact UWB monopole antenna with enhanced bandwidth using rotated L‐shaped slots and parasitic structures

Ojaroudi

2013

Micro & Optical Tech Letters

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In this article, a new design of compact ultrawideband (UWB) monopole antenna is presented .The antenna consists of a ordinary square radiating patch and a ground plane with pairs of rotated L‐shaped slots and parasitic structures. By cutting a pair of rotated L‐shaped slots and also by embedding a pair of rotate L‐shaped conductor‐backed plane in air gap distance, additional resonances are excited and much wider impedance bandwidth can be produced. Also, the usable upper frequency of the antenna is extended from 10.3 to 18.31 GHz. Simulated and measured results show that the antenna design exhibits an operating bandwidth (VSWR < 2) from 3.09 to 18.31 GHz which provides a wide usable fractional bandwidth of more than 140%. The proposed antenna has an ordinary square radiating patch, therefore, displays a good omnidirectional radiation pattern even at higher frequencies. The antenna configuration is simple, easy to fabricate, and can be integrated into UWB systems. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:175–178, 2014

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Reconfigurable monopole antenna with controllable band-notched performance for UWB communications

Cited by 41 publications

References 4 publications

Uwb/Omni-Directional Microstrip Monopole Antenna for Microwave Imaging Applications

Uwb/Omni-Directional Microstrip Monopole Antenna for Microwave Imaging Applications

Quad-Band Planar Inverted-F Antenna (Pifa) for Wireless Communication Systems

Compact UWB monopole antenna with enhanced bandwidth using rotated L‐shaped slots and parasitic structures

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