Monopole antenna loaded by stacked annular ring dielectric resonators for ultrawide bandwidth

Özzai̇m, Cengiz

doi:10.1002/mop.28595

Cited by 9 publications

(7 citation statements)

References 10 publications

(28 reference statements)

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“…In this paper, a new hybrid DRA configuration will be used to increase the impedance bandwidth of the antenna. Compared to earlier studies in the open literature [23][24][25][26][27][28], the proposed configuration results in multiple nearby resonant modes which explain the further substantial bandwidth enhancement. A measured fractional bandwidth about 148.6% (6.8 : 1) is obtained with a consistent monopole like radiation over the operating bandwidth and a peak gain of 7.14 dBi.…”

Section: Introductionmentioning

confidence: 66%

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Stacked Conical-Cylindrical Hybrid Dielectric Resonator Antenna for Improved Ultrawide Bandwidth

Al-Azza¹,

Malalla²,

Harackiewicz³

et al. 2018

PIER Letters

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Conical and cylindrical dielectric resonator elements are vertically stacked and excited by a simple coaxial monopole. Compared to all earlier configurations, the proposed geometry significantly improves the impedance bandwidth. The ultrawideband response is enhanced due to the multiple resonances occurring by the suggested hybrid antenna. The footprint area of the antenna is only 63.6 mm 2 or 25.44×10 −3 λ 2 o at the lowest operating frequency. The performance of the antenna is verified experimentally and numerically. Presented results show that the proposed hybrid monopole-DRA has a measured impedance bandwidth up to 148.6% (S 11 < −10 dB) along with consistent monopole-like radiation patterns and peak gain of 7.14 dBi. With such properties, the proposed hybrid monopole-DRA can be used in different ultra-wideband wireless applications and as wideband electromagnetic interference (EMI) sensors.

show abstract

Section: Introductionmentioning

confidence: 66%

“…The proposed antenna achieves wider impedance bandwidth than all recent ultra-wideband hybrid DRAs [23][24][25][26][27][28]. The proposed antenna achieves an improvement in the bandwidth by 8.6% compared to the widest impedance bandwidth hybrid DRA reported in the literature till now [24].…”

Section: Simulations and Measurementsmentioning

confidence: 82%

Stacked Conical-Cylindrical Hybrid Dielectric Resonator Antenna for Improved Ultrawide Bandwidth

Al-Azza¹,

Malalla²,

Harackiewicz³

et al. 2018

PIER Letters

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show abstract

“…Firstly, the impedance bandwidth of the DRA could be improved by decreasing the dielectric constant (ɛ r ) [4], enlarging the dimensions [4], or mounting parasitic elements [5][6][7]. Secondly, reshaping the dielectric substrate was developed as an effective way to widen the impedance bandwidth of the antennas to above 47.4% in [8,9].…”

Section: Introductionmentioning

confidence: 99%

“…Thirdly, the microstrip line could be alternatively added around the DRAs so as to generate the desired wideband performance of above 19% [10][11][12][13][14]. Whereas all of these wideband techniques [4][5][6][7][8][9][10][11][12][13][14] bring out a bulky structure or complicated geometry. Fourthly, reallocating several modes closely to each other is an alternative bandwidth-improvement method [15][16][17][18][19], but their height or diameters are dramatically enlarged to above 0.72λ 0 .…”

Section: Introductionmentioning

confidence: 99%

Compact dielectric resonator antenna with bandwidth enhancement via loading of shorting pins

Liu

Chen

et al. 2019

IET Microwaves, Antennas & Propagation

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A novel compact cylindrical dielectric resonator antenna (DRA) with improved bandwidth is proposed in this study. By loading the shorting pins around the nodal line of electric fields of TM011 mode of the DRA, an additional shorting‐pin mode could be excited for the antenna, while keeping an almost constant frequency of TM011 mode. After that, the DRA loaded with two, three, and four shorting pins is further studied. The results indicate that the resonant frequency of the shorting‐pin mode is progressively pushed up by increasing its number. With these arrangements, an improved‐bandwidth is obtained for the DRA loaded with four pins. Finally, the proposed DRA is fabricated and measured to validate the predicted performances. The results show that the DRA has gained an enhanced‐bandwidth (|S11| < –10 dB) of about 17% (3.65–4.33 GHz) under the radiation of dual modes, while keeping the stable conical radiation patterns. Most importantly, the height and diameter of the dielectric radiator are maintained as small as 0.09 and 0.32 free‐space wavelength, respectively.

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“…Moreover, complex-shaped DRAs are attempted. In [12], a hemispherical/conical-Shaped DRA is used to expand the bandwidth to 126%, and in [13]- [14], a monopole loaded stacked ring DRAs are researched. However, these methods lead to high profiles, and cannot be applied in wireless communication scenarios that need compact and low profile antennas.…”

Section: Introductionmentioning

confidence: 99%

Annular Column Loaded Cylindrical Dielectric Resonator Antenna for Wideband Conical Radiation

Lin

Deng

et al. 2015

IEEE Trans. Antennas Propagat.

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A wideband cylindrical dielectric resonator antenna (CDRA) loaded with an annular column, namely the LCDRA, is proposed and analyzed. The antenna comprises two components an inner cylindrical dielectric and a loaded concentric column dielectric. The proposed antenna is centrally fed by a coaxial probe, and has a low profile of 0.175 λ0 (λ0 is the wavelength of the center frequency). Four conical radiation pattern modes (TM01δ, TM02δ, TM03δ and TM04δ modes) are excited and merged, providing an impedance bandwidth of 56% (3.14~5.56 GHz). A prototype of the proposed antenna is built and tested. Good agreement between the simulated and measured results, including the reflection coefficient and radiation patterns, is achieved. Index Terms-dielectric resonator antennas (DRAs), conical radiation pattern, wideband antennas

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Monopole antenna loaded by stacked annular ring dielectric resonators for ultrawide bandwidth

Cited by 9 publications

References 10 publications

Stacked Conical-Cylindrical Hybrid Dielectric Resonator Antenna for Improved Ultrawide Bandwidth

Stacked Conical-Cylindrical Hybrid Dielectric Resonator Antenna for Improved Ultrawide Bandwidth

Compact dielectric resonator antenna with bandwidth enhancement via loading of shorting pins

Annular Column Loaded Cylindrical Dielectric Resonator Antenna for Wideband Conical Radiation

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