Analysis of a broadband hemispherical dielectric resonator antenna with a dielectric coating

Chen, Nan-Cheng

doi:10.1002/mop.4650070213

Cited by 22 publications

(10 citation statements)

References 3 publications

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“…In most of the above feed types, a single mode has been excited in the DRA with good coupling. Broadband DRA structures based on the multi-layer DRA configuration have been also reported, where broadbanding is achieved by appropriately choosing the number of layers, layer permittivities and thicknesses to couple multiple DRA modes or the DRA mode to the source resonance ( [11][12][13]).…”

Section: Introductionmentioning

confidence: 99%

Arc-Monopole Coupled Dra

Ghosh¹,

Kiranmayi²,

Mandal³

2015

PIER B

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In this work, characteristics of an arc-monopole loaded with a DRA is analyzed. It is observed that the arc-monopole can be used to effectively couple to multiple DRA modes and generate dual/triple/wideband topologies. The structure is easy to fabricate with no additional substrate or matching slot/vias required to excite the multiple DRA modes. In addition, both broadside and monopole like patterns are obtained for the dual/triple band configurations which are suitable for communication with satellite or airborne targets and for surface-to-surface communication. The enhanced radiation in the source plane for the monopole like pattern can be effectively used to communicate with preferred targets or enhance the range in the direction of interest. In addition, the arc-monopole can be suitably located to couple the source mode to the DRA modes to generate broadband behavior.

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Section: Introductionmentioning

confidence: 99%

Arc-Monopole Coupled Dra

Ghosh¹,

Kiranmayi²,

Mandal³

2015

PIER B

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“…Several methods have been considered in the literature to increase the bandwidth of DRAs. Exotic shapes [2][3][4], parasitic metal strips [5][6][7], and stacking parasitic DRAs [8][9][10], are among the most common ways, all of which are less suitable for millimetre-wave fabrication due to their complicated structures and use of metallic parts.…”

Section: Introductionmentioning

confidence: 99%

Development of Polymer-Based Dielectric Resonator Antennas for Millimeter-Wave Applications

Rashidian¹,

Klymyshyn²,

Aligodarz³

et al. 2010

PIER C

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The goal of this paper is to use polymer-based materials (instead of hard ceramics) in fabrication of dielectric resonator antennas at millimeter-wave frequencies. The soft nature of polymers facilitates machining of antennas, while the low permittivity of polymers naturally enhances the bandwidth. More importantly, advantageous properties (e.g., flexibility and photosensitivity) of some polymers introduce special capabilities which can not be achieved by ceramics. A photosensitive polymer is utilized in this paper to fabricate polymer-based resonator antennas. As a result, deep X-ray lithography is enabled to produce high quality antenna structures. The proposed dielectric resonator antennas which inherently have very low relative permittivity (usually in a range from 3 to 5) are excited effectively using a slot-coupled feeding method and analyzed in both the frequency and time domains. Impedance and radiation properties are compared with higher permittivity ceramic antennas. Impedance bandwidths up Corresponding author: A. Rashidian (atabak.rashidian@usask.ca). † Both are also with TRLabs, 111, 116 Research Drive, Saskatoon, SK S7N 3R3, Canada. 204 Rashidian et al.to 32 percent are measured and stable radiation patterns with low cross polarization levels over the entire bandwidth are achieved for the prototype antenna. This method enables lithography-based batch fabrication of structures with fine features and complex geometries.

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“…Wider bandwidth can be obtained, by modifying the shapes of the DRA using methods like increasing the surface area or by cutting slots and sections. Multilayer stacking of different dielectric materials [13] and air gap [14] in DRA for broad band applications have also been studied [1,3].…”

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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Analysis of a broadband hemispherical dielectric resonator antenna with a dielectric coating

Cited by 22 publications

References 3 publications

Arc-Monopole Coupled Dra

Arc-Monopole Coupled Dra

Development of Polymer-Based Dielectric Resonator Antennas for Millimeter-Wave Applications

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

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