A Singly Fed Wideband Circularly Polarized Dielectric Resonator Antenna Using Concentric Open Half-Loops

Sulaiman, M. I.; Khamas, S.K.

doi:10.1109/lawp.2011.2176905

Cited by 58 publications

(39 citation statements)

References 17 publications

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“…Although the −10 dB reflection coefficient bandwidth is reduced, it is important to note that this 3 dB AR bandwidth of the proposed antenna is wider than that of the Spidron fractal slot antenna without a DR. [11] The measured LHCP gain within the 3 dB AR bandwidth varies from 2.30 dBic to 4.23 dBic. In order to evaluate the performance of the antenna, the −10 dB reflection coefficient and 3 dB AR bandwidths of the proposed antenna are compared with those of the antennas presented in earlier works [9][10][11]. These results are shown in Table 2.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, considerable efforts have been made with regard to CP DRAs in recent years. [4][5][6][7][8][9][10] Generally, the CP DRAs can be fed by a single feed or by dual feeds. Although CP DRAs with a single feed have a simple structure, their 3 dB axial ratio (AR) bandwidths are very narrow (about 4%).…”

Section: Introductionmentioning

confidence: 99%

“…A CP rectangular DRA excited by concentric open half-loops exhibiting an AR bandwidth of 14% was also reported. [9] In other work, [10] a wideband CP trapezoidal DRA excited by a single 45°inclined slot was designed with an AR bandwidth of 20.4%.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Wideband circularly polarized Spidron fractal slot antenna with a grooved dielectric resonator

Lee

Kwon

Song

et al. 2015

Journal of Electromagnetic Waves and Applications

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A single-feed wideband circularly polarized Spidron fractal slot antenna with a grooved dielectric resonator is presented. To realize a wideband axial ratio, the circular polarizations of both a Spidron fractal slot and a grooved rectangular dielectric resonator are merged. The proposed antenna is excited by a simple 50-Ω microstrip feed line which is located underneath the Spidron fractal slot. A prototype of the proposed antenna is fabricated and tested. The measured −10 dB reflection coefficient bandwidth and 3 dB axial ratio bandwidth are 40.33% (1.94-2.92 GHz) and 23.75% (2.30-2.92 GHz), respectively. The measured peak gain of the antenna is 4.23 dBic.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Wideband circularly polarized Spidron fractal slot antenna with a grooved dielectric resonator

Lee

Kwon

Song

et al. 2015

Journal of Electromagnetic Waves and Applications

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“…Recently, several studies have been presented to generate wideband and dual band CPDRA [2]- [3]. Two common techniques have been used to generate CP, single feed [4] and dual feed [5] mechanisms. Although the single feed is simpler, it provides a narrow AR bandwidth.…”

Section: Introductionmentioning

confidence: 99%

Planar wideband circularly polarized dielectric resonator antenna

Khalily

Kamarudin

Danesh

2013

2013 IEEE Antennas and Propagation Society International Symposium (APSURSI)

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A wideband and compact circularly polarized (CP) C-shaped dielectric resonator antenna (DRA) is presented. The proposed C-shaped DR is excited by a microstrip feed in one side of the dielectric substrate. DR is housed inside the thin dielectric substrate above the vertical ground plane edge. By using one narrow short circuit strip, CP bandwidth of the proposed antenna is enhanced. The final design achieves CP with 44% axial ratio (AR) bandwidth. The proposed circularly polarized DRA with good radiation characteristics offers an impedance bandwidth of 67% between 3.35 and 6.76GHz for VSWR < 2. © 2013 IEEE

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“…Several single-point-feed regular-shaped DRAs with a wide CP bandwidth have been reported in recent years. For example, a 3 dB AR bandwidth of 13% has been obtained using concentric open half-loops to excite a rectangular DRA [7]. A lumped resistively loaded monofilar-spiral-slot excited rectangular DRA has achieved a wide 3 dB AR bandwidth of 18.7%; however, the introduction of the resistor in this design leads to a decrease of about 20% in radiation efficiency [8].…”

mentioning

confidence: 99%

Wideband hybrid circularly polarised rectangular dielectric resonator antenna excited by modified cross‐slot

Zou

Pan

2014

Electron. lett.

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A wideband circularly polarised (CP) rectangular dielectric resonator antenna (DRA) based on the concept of a hybrid antenna is presented. In this design, the modified cross-slot simultaneously performs the functions of an effective radiator and the feeding structure of the rectangular dielectric resonator (DR). By properly designing the structure parameters of the DRA, the resonances of the modified cross-slot and the DR can be merged to obtain a wide CP bandwidth. A prototype antenna is designed, fabricated and measured, and a wide 3 dB axial ratio bandwidth of 24.6% is achieved.Introduction: Dielectric resonator antennas (DRAs) [1] have been investigated extensively in the past two decades because of their attractive features such as low loss, high radiation efficiency, ease of excitation and wide bandwidth. Circularly polarised (CP) DRAs are particularly useful for wireless communication systems because they are less sensitive to the antenna orientation than the linearly polarised ones. The typical 3 dB axial ratio (AR) bandwidth of the regular-shaped DRAs is about 3% [2, 3]. Wider CP bandwidths can be obtained by utilising multiple-feed [4] or novel DRA geometries [5,6]. However, the multiple-feed designs are complicated to implement because they need a complex feeding network. Owing to the existing simple equations for predicting the resonant frequencies of regular-shaped dielectric resonators (DRs), the regular-shaped DRAs are more easy to design than the ones with novel DRA geometries. Several single-point-feed regular-shaped DRAs with a wide CP bandwidth have been reported in recent years. For example, a 3 dB AR bandwidth of 13% has been obtained using concentric open half-loops to excite a rectangular DRA [7]. A lumped resistively loaded monofilar-spiral-slot excited rectangular DRA has achieved a wide 3 dB AR bandwidth of 18.7%; however, the introduction of the resistor in this design leads to a decrease of about 20% in radiation efficiency [8].In this Letter, a wideband CP rectangular DRA is presented based on the concept of a hybrid antenna [9]. The modified cross-slot simultaneously acts as the feeding structure of the rectangular DRA and as a dielectric-loaded modified cross-slot antenna. By optimising the structure parameters of the proposed antenna, the resonances of the modified crossslot excited DRA and the dielectric-loaded modified cross-slot antenna can be merged to achieve a wideband CP operation. A prototype of the proposed antenna has been designed, fabricated and measured. It was found that a 3 dB AR bandwidth as wide as 24.6% can be achieved. Broadside radiation patterns were obtained across all of the 3 dB AR bandwidths.

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A Singly Fed Wideband Circularly Polarized Dielectric Resonator Antenna Using Concentric Open Half-Loops

Cited by 58 publications

References 17 publications

Wideband circularly polarized Spidron fractal slot antenna with a grooved dielectric resonator

Wideband circularly polarized Spidron fractal slot antenna with a grooved dielectric resonator

Planar wideband circularly polarized dielectric resonator antenna

Wideband hybrid circularly polarised rectangular dielectric resonator antenna excited by modified cross‐slot

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