A Broadband Pattern Diversity Annular Slot Antenna

Gallo, M.; Antonino‐Daviu, Eva; Ferrando‐Bataller, Miguel; Bozzetti, M.; Molina‐Garcia‐Pardo, José‐María; Juan-Llácer, L.

doi:10.1109/tap.2011.2180314

Cited by 93 publications

(83 citation statements)

References 22 publications

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“…Many studies have been carried out to design UWB diversity antennas [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. However, the impedance bandwidth of the antennas in [5][6][7][8] cannot cover the whole UWB, and the sizes of the antennas are relatively large in [5,[9][10][11][12][13][14][15][16][17] which are not suitable for some portable devices' applications.…”

Section: Introductionmentioning

confidence: 99%

“…However, the impedance bandwidth of the antennas in [5][6][7][8] cannot cover the whole UWB, and the sizes of the antennas are relatively large in [5,[9][10][11][12][13][14][15][16][17] which are not suitable for some portable devices' applications. On the other hand, the frequency range for UWB systems between 3.1 to 10.6 GHz will cause interference to the existing wireless communication systems, such as the wireless local area network (WLAN) for IEEE 802.11a operating in 5.15-5.825 GHz, so the UWB diversity antenna with a band-notched function is desired in the design.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, the frequency range for UWB systems between 3.1 to 10.6 GHz will cause interference to the existing wireless communication systems, such as the wireless local area network (WLAN) for IEEE 802.11a operating in 5.15-5.825 GHz, so the UWB diversity antenna with a band-notched function is desired in the design. However, the antennas in [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] do not have the band-notched function to avoid the interference. Recently, some antennas with band-notched function have been reported [22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

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A Compact Band-Notched Ultra-Wideband Spatial Diversity Antenna

Zhao¹,

Zhang²,

Zhang³

et al. 2014

PIER C

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Abstract-A compact band-notched ultra-wideband (UWB) spatial diversity antenna is presented in this paper. The antenna is fabricated on an FR4 substrate and consists of two tapered microstrip feeding lines and two radiating elements. The wireless local area network (WLAN) for IEEE 802.11a operating in 5.15-5.825 GHz band-notched function is achieved by introducing two slits in the radiators as λ/4 resonators. The simulated and measured results show that the presented antenna has a broadband impedance bandwidth which covers UWB band and also has a band-notched characteristic. Additionally, the antenna has a good transmission coefficient better than −15 dB across the UWB. The radiation patterns, peak gain, and envelope correlation coefficient are measured and discussed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Compact Band-Notched Ultra-Wideband Spatial Diversity Antenna

Zhao¹,

Zhang²,

Zhang³

et al. 2014

PIER C

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“…Compared to existing pattern diversity antenna [10][11][12][13][14], the proposed structure provides compactness, wide dual-pass bandwidth, sharp cutoff for dual band-notch characteristics and low mutual coupling with high diversity. These intrinsic properties make the proposed antenna highly suitable for dual-band diversity applications.…”

Section: Realization Of Diversity Antenna With Reduced Mutual Couplinmentioning

confidence: 99%

“…Antenna diversity involves coplanar twin antenna system with separate feeds [10][11][12][13][14], this enhances reception capability of antenna and increases antenna gain. Since it has coplanartwin antennas, it is important that there should be minimum mutual coupling between them.…”

Section: Introductionmentioning

confidence: 99%

Bluetooth/Uwb Dual-Band Planar Diversity Antenna With Wimax and Wlan Band-Notch Characteristics

Reddy¹,

Chittora²,

Kharche³

et al. 2013

PIER B

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Abstract-In this paper, a stage wise realization of compact Bluetooth -UWB dual-band diversity antenna with WiMAX and WLAN band-notch characteristics is presented.The proposed structure consists of two co-planar semicircular dual band-notch monopole antennas, mounted with planar spiral. Individual antenna configuration provides an impedance bandwidth (VSWR < 2) for dualband i.e., both Bluetooth and UWB bands. For dual band-notch characteristic, two sets of spirals are capacitively coupled with the feed line of antenna. This configuration provides band-notch (VSWR < 2) for WiMAX i.e., (3.3-3.6 GHz) and WLAN (5.13-5.85 GHz) bands. For enhancing reception capabilities of the proposed structure, twin coplanar antennas are used to fulfill diversity requirements. However, due to coplanar and close proximity to each other, there is high possibility of mutual coupling between coplanar antenna elements. To address the mutual coupling between elements, cross-strip variablesized frequency selective structures are used. Antenna diversity of the proposed structure is validated by measuring radiation pattern characteristic and envelop co-relation factor (ECC). A good agreement between measured and simulated responses ensures that the proposed diversity antenna can be used for interference free Bluetooth/UWB dual-band applications.

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Pentagon inscribed circular superwideband fractal MIMO antenna

Lodhi

Singhal

2021

Int J Communication

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A compact circular fractal antenna element loaded with a central pentagonal slot is presented in this paper. This structure consists of a fourth iterative radiator fed by a partially tapered feed line and CPW defected ground plane. A superwide impedance bandwidth of 3.45-52.17 GHz ($175% fractional bandwidth) is achieved. Two multiple input multiple output (MIMO) configurations are also designed and analyzed by using this antenna element. For spatial and pattern diversity configurations, the impedance bandwidth of 3.45-52.2 and 3.1-52.2 GHz are achieved, respectively. The optimized footprints of antenna element, spatial diversity configuration, and pattern diversity configurations are 28 Â 24, 28 Â 53, and 45 Â 48 mm 2 , respectively. The isolation for both MIMO configurations is more than 20 dB in maximum portion of the operating bandwidth. Desirable radiation and diversity performance characteristics are achieved for antenna element and MIMO configurations. The wide bandwidth, compact dimensions along with good radiation, and diversity performance characteristics make the proposed antenna configurations suitable for integration in superwideband wireless communication systems. A good agreement between the experimental and simulation results is observed.coplanar waveguide feeding, defective ground structure, fractal antenna, MIMO applications, superwideband applications, tapered feed line | INTRODUCTIONAfter the allocation of unlicensed frequency spectrum 3.1-10.6 GHz for ultrawideband (UWB) applications by Federal Communication Commission (FCC) in 2002, both academic and industry researchers started making efforts for the integration of UWB technology in wireless communication systems. This integration resulted in secure wireless communication services at high data rates over a wide range of frequencies. With the advancement in technology, the demands for security, data rate and wide bandwidth increased exponentially. These demands required antenna structures which can provide service for both short-range and long-range communication (already covered by UWB spectrum). To fulfill these demands, a new technology, that is, superwideband (SWB) technology, having ratio bandwidth of 10:1 or more is defined. To integrate SWB technology in wireless communication systems, several antenna structures were explored to operate over a wide range of frequencies and can be integrated with compact communication devices. Among the various explored antenna structures, monopole antennas are found be good candidates who can provide

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A Broadband Pattern Diversity Annular Slot Antenna

Cited by 93 publications

References 22 publications

A Compact Band-Notched Ultra-Wideband Spatial Diversity Antenna

A Compact Band-Notched Ultra-Wideband Spatial Diversity Antenna

Bluetooth/Uwb Dual-Band Planar Diversity Antenna With Wimax and Wlan Band-Notch Characteristics

Pentagon inscribed circular superwideband fractal MIMO antenna

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