Resonant hemispherical dielectric antenna

McAllister, M.; Long, Stuart A.

doi:10.1049/el:19840450

Cited by 199 publications

(62 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A simple HDRA of radius 2.54 cm based on the above material specification will resonate at 1.8 GHz with TE 111 being the dominant mode, when given an offset probe feed [2,5,12]. The design equation of a simple Hemispherical DRA geometry is given as below [5]:…”

Section: Half Hdra With Periodic Slotmentioning

confidence: 99%

“…The hemispherical geometry has drawn attention since its inception [5] due to its wide bandwidth and the simplicity of analysis. The interface between the air and dielectric can be modeled with ease and we do not need any magnetic wall assumption [6] as needed in case of rectangular DRA.…”

Section: Introductionmentioning

confidence: 99%

“…The interface between the air and dielectric can be modeled with ease and we do not need any magnetic wall assumption [6] as needed in case of rectangular DRA. The HDRA can be excited by various feeding mechanisms like slot coupled [7][8][9], aperture coupled [10], microstrip feed [1], and waveguide feed [11], but when fed by a coaxial probe, it is capable of exciting the dominant TE 111 mode and TM 101 mode [5,12].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Mukherjee¹,

Patel²,

Reddy³

et al. 2013

PIER C

View full text Add to dashboard Cite

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.

show abstract

Section: Half Hdra With Periodic Slotmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Mukherjee¹,

Patel²,

Reddy³

et al. 2013

PIER C

View full text Add to dashboard Cite

show abstract

“…DRAs of diverse shapes also have been widely researched. Professor Long brought forward and investigated the cylindrical [7], rectangular [8], and hemispheric DRA [9], which has laid a good foundation for the development of DRA. Other configurations including triangular, cylindrical-ring DRAs [10] were also studied.…”

Section: Introductionmentioning

confidence: 99%

A Novel Compact Three-Port Dielectric Resonator Antenna With Reconfigurable Pattern for Wlan Systems

Liu¹,

Wei²,

Liu³

et al. 2014

PIER C

View full text Add to dashboard Cite

Abstract-Splitting a cylinder dielectric resonator into four uniform quarters generates a new dielectric resonator antenna (DRA) shape, which is named a quarter volume of cylinder dielectric resonator antenna (QVCDRA) in the paper. On the basis, a novel compact three-port dielectric resonator antenna with reconfigurable radiation pattern is presented for WLAN systems at 5.2 GHz. A −10 dB impedance bandwidth of 16.20%, covering the frequency range from 4.75 GHz to 5.54 GHz, is obtained with an isolation of lower than −19 dB. The structure consists of three QVCDRAs that arrange evenly around Z axis, and as a result possesses the advantage of compact structure, wide impendence band and reconfigurable radiation patterns. The volume of the proposed three-port DRA without ground plane is only 0.0216λ 3 d (λ d is the dielectric wave length at the central operation frequency). The proposed antenna is analyzed in detail. Antenna prototype is fabricated and tested. The simulation and test results are in good agreement.

show abstract

“…Since the early experimental study of dielectric resonator antenna (DRA) by Long, McAllister and others [1][2][3], the dielectric resonator antennas have been studied extensively. It has been shown that DRAs can be used as effective radiators at microwave frequencies where ohmic losses become a serious problem for conventional metallic antennas.…”

Section: Introductionmentioning

confidence: 99%

Radiation Pattern of Aperture Coupled Prolate Hemispheroidal Dielectric Resonator Antenna

Song¹,

Sebak²

2006

PIER

View full text Add to dashboard Cite

Abstract-An analytical solution for the radiation by a prolate hemispheroidal dielectric resonator antenna (DRA) over an infinite ground plane excited by a rectangular slot is presented. The dyadic Green's functions pertaining to a magnetic-current source are used in a form convenient for numerical computations. The dyadic Green's functions are then employed to formulate the electromagnetic fields radiated by the DRA. The electromagnetic far field is expressed analytically in a compact form. The far field patterns for different design parameters are computed and plotted.

show abstract

Resonant hemispherical dielectric antenna

Cited by 199 publications

References 1 publication

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

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

A Novel Compact Three-Port Dielectric Resonator Antenna With Reconfigurable Pattern for Wlan Systems

Radiation Pattern of Aperture Coupled Prolate Hemispheroidal Dielectric Resonator Antenna

Contact Info

Product

Resources

About