Hemispherical DRA Antennas Mounted on or Embedded in Circular Cylindrical Surface forProducing Omnidirectional Radiation Pattern

Zainud-Deen, S.H.; El-Shalaby, Noha A.; Awadalla, K. H.

doi:10.4236/ijcns.2011.49072

Cited by 3 publications

(2 citation statements)

References 26 publications

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“…The d ielectric resonator antenna (DRA) has man y ad vant ag es includ ing wide band widt h and h igh radiat ion efficiency that are necessary for thoseapplicat ions [8][9][10]. The rad iation characteristics of cylindrical DRA and hemispherical DRA p laced on or embedded in superquadric cylindrical, circular cy lindrical and spherical ground planes are investigated in [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Hemispherical Dielectric Resonator Antennas over Non-Planar Surfaces for Direction Finding Systems

Zainud-Deen¹,

El-Shalaby²,

Awadalla³

2012

IJEA

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Section: Introductionmentioning

confidence: 99%

Hemispherical Dielectric Resonator Antennas over Non-Planar Surfaces for Direction Finding Systems

Zainud-Deen¹,

El-Shalaby²,

Awadalla³

2012

IJEA

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“…Pattern reconfigurable Hemispherical Dielectric Resonator Antennas and their linear phased arrays have also been studied [16], which show the capability of configuring the beam in four directions. It has also been shown that HDRA placed on a cylindrical ground plane is capable of producing high gain and omnidirectional radiation pattern [17].…”

Section: Introductionmentioning

confidence: 99%

A Novel Half Hemispherical Dielectric Resonator Antenna With Array of Slots for Wideband Applications

Mukherjee¹,

Patel²,

Reddy³

et al. 2013

PIER C

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Abstract-A novel half Hemispherical Dielectric Resonator Antenna (HDRA) with an array of slots has been designed. The dielectric material used is Rogers TMM10, which is a ceramic thermoset polymer composite material having a dielectric constant of ε r = 9.2. Periodic holes lower down the Q factor of the antenna and hence enhance the impedance bandwidth. The measured value of the 10 dB bandwidth is close to 1 GHz (∼17.74%). The mode investigated is a TM 101 like mode. Further, the effect of increasing the probe length on the resonance and the radiation pattern is also studied. As the probe length is increased, a shift in the resonant frequency is observed and the Dielectric Resonator Antenna (DRA) behaves as a monopole antenna loaded with the DRA. The experimental results confirm that a wide bandwidth of 1.3 GHz (∼29%) with a high gain of 7.2 dBi can be obtained. The radiation pattern of such an antenna is directive in nature.

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Dielectric Resonator Antenna Mounted on Cylindrical Ground Plane for Handheld RFID Reader at 5.8 GHz

Zainud-Deen¹,

El-Shalaby

Awadalla³

2012

AEM

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Dielectric resonator antenna (DRA) mounted on cylindrical ground plane is investigated for handheld RFID reader applications at 5.8 GHz. The simplicity of the structure makes it practical in terms of cost, space, and ease of fabrication. The radiation characteristics of the antenna in free space and in the presence of a proposed compact reader device model and human hand are calculated. The antenna is circularly polarized and exhibits peak gain of 7.62 dB at 5.8 GHz with high front to back ratio of 15.5 dB. Using the same reader device model, a sequentially feeding 2×2 DRA array mounted on the same cylindrical ground plane is used for RFID reader antenna at 5.8 GHz. The array introduces high gain of 9.36 dB at 5.8 GHz with high front to back ratio of 10.48 dB. The 2×2 DRA array elements exhibit circular polarization over a frequency band of 1.1 GHz. The axial ratio is 1.1 dB at 5.8 GHz. The proposed reader model is simple and has a small size compared with that in the case of planar ground plane. The results are calculated using the finite element method (FEM) and compared with that calculated using the finite integral technique (FIT).

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Hemispherical DRA Antennas Mounted on or Embedded in Circular Cylindrical Surface forProducing Omnidirectional Radiation Pattern

Cited by 3 publications

References 26 publications

Hemispherical Dielectric Resonator Antennas over Non-Planar Surfaces for Direction Finding Systems

Hemispherical Dielectric Resonator Antennas over Non-Planar Surfaces for Direction Finding Systems

A Novel Half Hemispherical Dielectric Resonator Antenna With Array of Slots for Wideband Applications

Dielectric Resonator Antenna Mounted on Cylindrical Ground Plane for Handheld RFID Reader at 5.8 GHz

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