Topic
Dielectric resonator antenna
About: Dielectric resonator antenna is a research topic. Over the lifetime, 8199 publications have been published within this topic receiving 111090 citations. The topic is also known as: DRA.
Papers published on a yearly basis
Papers
More filters
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TL;DR: In this paper, the case of an arbitrary slot on a circular cylinder with a concentric dielectric coating has been investigated for a range of values of cylinder diameters.
Abstract: .\
a lvs i:; is prese nted for t he fi elds produced by an ar bitrary slot on a circular cylinder \\\\'hich h as a concentric dielectric coating. Express ions for t he fa r-zone fi elds are developed by evaluatin g t he appropr iate in tegrals usi ng a saddle-poin t m ethod. Xumer-ical res ults are presented for the case' of a narro'\" ax ia l slot for a range of values of cylinder diameters a nd electrical constants of t he dielect ric coating. There is some ev idence that t he coati ng prov ides a tmp or a duc t for s urface ,,'<1 ,'es, resulting in an increase of over-a ll a mplit ude of t he field in the backward direct ion.
32 citations
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TL;DR: In this article, a re∞ectarray confluration is proposed for low-loss applications at millimeter-wave (MW) frequency bands, based on the use of dielectric resonator antennas (DRA) as radiating unitcells.
Abstract: A new re∞ectarray conflguration is proposed for low-loss applications at millimeter waves. It is based on the use of dielectric resonator antennas (DRA) as radiating unit-cells. The phase response of the elementary cell is controlled by adjusting the length of a parasitic narrow metal strip printed on the top of each DRA. A 330 - phase dynamic range is obtained for DRAs made in rigid thermosetting plastic ("r = 10). As the antenna radiating aperture is non ∞at, an original low-cost fabrication process is also introduced in order to fabricate the parasitic strips on the DRA surface. A 24 £ 24- element array radiating at broadside has been designed at 30GHz and characterized between 29 and 31GHz. The antenna gain reaches 28.3dBi at 31GHz, and the measured i1dB-gain radiation bandwidth is 5.2%. The 3.2dB loss observed between the measured gain and theoretical directivity is mainly due to the spillover loss (2.3dB). The total dielectric and conductor loss is less than 0.9dB.
32 citations
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23 May 1997
TL;DR: In this article, a dielectric resonator filter is configured to suppress emissions in an out-of-band frequency portion of an amplified radio frequency (RF) signal prior to transmission of the RF signal by an antenna assembly.
Abstract: A dielectric resonator filter is configured to suppress emissions in an out-of-band frequency portion of an amplified radio frequency (RF) signal prior to transmission of the RF signal by an antenna assembly. The filter includes plural tunable resonant cavities, each of which have a dielectric resonator and are arranged to suppress a magnitude of a frequency component in the out-of-band frequency portion of the RF signal. The amplified RF signal is applied to the plural resonant cavities with a microstrip transmission line. The dielectric resonators are arranged so as to automatically compensate for temperature-induced resonance condition variations.
32 citations
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11 Feb 2015TL;DR: In this article, a multi-band antenna with a battery resonator is described, where the battery is placed in between and proximity coupled to the front ground plane and the rear ground plane extension.
Abstract: Systems and techniques are provided for multi-band antenna with a battery resonator. An antenna may include a ground plane, a front ground plane extension and a rear ground plane extension attached to the ground plane, a dielectric layer, an antenna layer, and a battery. The dielectric layer may include dielectric material placed over the front ground plane extension. The dielectric layer may be in between the antenna layer and the front ground plane extension. The antenna layer may include a high frequency antenna element and a low frequency antenna element attached to a transmission line. The battery may be placed in between and proximity coupled to the front ground plane extension and the rear ground plane extension. The front ground plane extension, rear ground plane extension, ground plane and battery may be proximity coupled to the low-frequency antenna element.
32 citations
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TL;DR: In this paper, the feasibility of solidly mounted resonator type SH0 mode plate wave resonator was investigated systematically by finite element method simulation and the design parameters including the Euler angle, thickness of a LiNbO3 plate, and the material and thickness of an interdigital transducer were optimized.
Abstract: A cognitive radio system using a vacant frequency band of digital TV channels (TV white space) requires a tunable filter with wide tunable ranges of center frequency and bandwidth. An ultra-wideband resonator is a key device to implement the tunable filter, because the tunable range is limited by the bandwidth (BW) of the resonators. A 0-th shear horizontal (SH0) mode plate wave resonator using an ultra-thin LiNbO3 plate is known to have a large electromechanical coupling factor, i.e., a large BW, but the structural fragility of the ultra-thin LiNbO3 plate is problematic. In this study, the feasibility of solidly mounted resonator type SH0 mode plate wave resonator was investigated systematically by finite element method simulation. The design parameters including the Euler angle, thickness of a LiNbO3 plate, and the material and thickness of an interdigital transducer were optimized. With the best design, a BW as wide as 26% is obtained.
32 citations