X-band linear polarized aperture-coupled DRA reflectarray

Abd-Elhady, A. M.; Zainud-Deen, S.H.; Mitkees, A. A.; Kishk, Ahmed A.

doi:10.1109/icmmt.2010.5524816

Cited by 16 publications

(12 citation statements)

References 8 publications

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“…Thus, dielectric resonators could be a better candidate than microstrip patches for reflectarray applications. Separate dielectric resonators or dielectric resonators combined with printed patches were introduced as alternative element for reflectarray antennas [7][8][9][10][11]. Keller et al [7] introduced a variable length DRA as an element for a reflectarray at 30 GHz.…”

Section: Introductionmentioning

confidence: 99%

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Reflectarray antenna for X-band applications

Yamani

Attiya

Abdelmageed

2016

2016 33rd National Radio Science Conference (NRSC)

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An X-band reflectarray antenna of center frequency 12 GHz for direct broadcast application is designed based on cylindrical dielectric resonator elements. The phase of the reflection coefficient of each element is adjusted by changing the radius of the dielectric resonator. The results of the designed reflectarray are compared with the corresponding results of a reflector antenna of the same aperture size. Good agreement between the designed reflectarray and the corresponding reflector antenna is obtained.

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Section: Introductionmentioning

confidence: 99%

“…Abd-Elhady et al [9] showed that a slotloaded rectangular dielectric resonator could provide 13% improvement in the operating bandwidth. Further enhancement was introduced by the same authors in [10] to achieve an 18% improvement in the operating bandwidth. However, they increased the number of layers of the proposed elements.…”

Section: Introductionmentioning

confidence: 99%

Reflectarray antenna for X-band applications

Yamani

Attiya

Abdelmageed

2016

2016 33rd National Radio Science Conference (NRSC)

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“…DRAs offer many advantages, such as lowprofile, low-cost, ease of excitation and high radiation efficiency. Reflectarray antennas realized by rectangular and crossed dielectric resonator for linear and circular polarizations are investigated in [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Wideband perforated rectangular dielectric resonator antenna reflectarray

Zainud-Deen

Gaber

Abd-Elhady

et al. 2011

2011 IEEE International Symposium on Antennas and Propagation (APSURSI)

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A wideband perforated rectangular dielectric resonator antenna (RDRA) reflectarray is presented. The array of RDRA are formed from one piece of material. Air-filled holes are drilled into the material around the RDRA. This technique of fabricating RDRA reflectarray using perforations eliminates the need to position and bond individual elements in the reflectarray and makes the fabrication of the RDRA reflectarray feasible. The ground plane below the reflectarray elements is folded to form a central rectangular concave dip so that an air-gap is formed between the RDRA elements and the ground plane in order to increase the bandwidth. Full-wave analysis using the finite integration technique is applied. Three cases are studied. In the first one, the horn antenna is placed at the focal point to illuminate the reflectarray and the main beam is in the broadside direction. In the second one, the horn antenna is placed at the focal point and the main beam is at ±30 degrees off broadside direction. In the third one, an offset feed RDRA reflectarray is considered. A variable length RDRA provides the required phase shift at each cell on the reflectarray surface. The normalized gain patterns, the frequency bandwidth, and the aperture efficiency for the above cases are calculated.

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“…A X-band Linear polarized reflectarray supported on slot with variable lengths was investigated to obtain a complete period phase cycle [16]. Aperture coupled DRA with variable strip line at X-band was design with good performance in radiation patterns and total efficiency [17]. In this paper, DRA reflectarray with slot-loading is investigated.…”

Section: Introductionmentioning

confidence: 99%

Dual Sized Varying Slot Lengths Loading Dielectric Resonator Reflectarray

Abd-Elhady¹,

Zainud-Deen²,

Mitkees³

et al. 2012

IJEA

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A reflectarray antenna consists of elements of rectangular dielectric resonator (DRA) with slot loading of different lengths is proposed for bandwidth enhancement. Two DRA sizes an two slot widths are available to tune the phase of each element in the reflectarray so that a full 360 degrees phase shifts can be achieved by superposition. Two structures are presented in that paper. The first is center fed reflectarray while the second is offset fed for decreasing the feeder blockage. The antenna has 10% bandwidth for 1 dB gain variation is obviously wider than that of conventional reflectarray antenna while the offset fed reflectarray provide better far field pattern with back lobes reduction by -5 dB and side lobe by -2 dB. A pyramidal X-band horn was used in both reflectarrays which have 23 x 23 elements of with cells separation of 12 mm that less than 15 mm (lambda/2) for avoiding grating lobes. The analyses are carried out using the finite integration technique (FIT) and the transmission line method (TLM) with good agreements between them.

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X-band linear polarized aperture-coupled DRA reflectarray

Cited by 16 publications

References 8 publications

Reflectarray antenna for X-band applications

Reflectarray antenna for X-band applications

Wideband perforated rectangular dielectric resonator antenna reflectarray

Dual Sized Varying Slot Lengths Loading Dielectric Resonator Reflectarray

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