Wideband cylindrical dielectric resonator antenna excited using an L‐strip feed

Menon, Sreedevi K.; Lethakumary, B.; Mohanan, P.; Bijumon, P.V.; Sebastian, Mailadil Thomas

doi:10.1002/mop.20281

Cited by 13 publications

(9 citation statements)

References 3 publications

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“…High-dielectric-constant, low-loss Ca 5 Nb 2 TiO 12 [3] ceramic dielectric-resonator material is prepared in a single phase via solid-state ceramic technology. Ca 5 Nb 2 TiO 12 has a low density of 4.05 g/cm 3 , dielectric constant dr ϭ 48, Q u ϫ f Ͼ 26,000 at 4 GHz, and temperature coefficient of the resonant frequency f ϭ 40 ppm/°C.…”

Section: Formulationmentioning

confidence: 99%

“…Recently, a microstrip-energised, high-permittivity ( dr ϭ 48) rectangular DRA with wideband was reported [2]. Further enhancement of the bandwidth of a DRA was done using L-shaped feed [3,4]. The purpose of this paper is to investigate the effect of Tshaped feed-line excitation in order to further enhance the bandwidth of operation.…”

Section: Introductionmentioning

confidence: 99%

“…Metamaterials are a kind of artificial electromagnetic material that are typically realized by periodic metallization patterns arranged on dielectric substrates, and have electromagnetic characteristics which differ from the patterns, such as negative refraction [1,2], electromagnetic band gap [3,4], and high-impedance property [4,5]. Due to their novel properties, metamaterials have a variety of applications from microwave to optical frequencies [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

T-strip-fed high-permittivity rectangular dielectric resonator antenna for broadband applications

Bijumon¹,

Menon²,

Suma³

et al. 2005

Microw. Opt. Technol. Lett.

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Section: Formulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

T-strip-fed high-permittivity rectangular dielectric resonator antenna for broadband applications

Bijumon¹,

Menon²,

Suma³

et al. 2005

Microw. Opt. Technol. Lett.

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“…The interest in dielectric resonator antennas (DRAs) for a variety of wireless communications systems has grown in the last few years [1][2][3][4][5][6][7][8]. Dielectric resonators (DRs) are fabricated from low-loss dielectric materials, for which the resonant frequency is predominantly a function of size, shape and permittivity.…”

Section: Introductionmentioning

confidence: 99%

Compact Dielectric Resonator Antenna With Band-Notched Characteristics for Ultra-Wideband Applications

Majeed

Abdullah²,

Sayidmarie³

et al. 2015

PIER C

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Abstract-In this paper, a compact dielectric resonator antenna (DRA) with band-notched characteristics for ultra-wideband applications is presented. A comprehensive parametric study was carried out using CST Microwave Studio Suite TM 2011 to analyze and optimize the characteristics of the proposed antenna. Three shapes for the coupling slot were investigated. Simulation results show that the proposed DRA had a −10 dB impedance bandwidth of 23% from 9.97 GHz to 12.558 GHz, and a maximum gain of 7.23 dBi. The antenna had a notched band centered at 10.57 GHz, which increased the reflection coefficient by 23.5 dB, and reduced the gain by 6.12 dB. The optimized designs were verified by experimental tests on fabricated samples.

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“…As the bandwidth of a DRA is limited by the permittivity ( r ) of the DR being used, various feed designs [6,7] have been employed to obtain the desired impedance bandwidth for high r DRAs. A half-cylindrical DR geometry such as the one presented here can support multiple radiating modes [8] and, if properly excited, impedance bands corresponding to those modes having similar radiation characteristics can be merged so as to provide the band suitable for a particular application.…”

Section: Introductionmentioning

confidence: 99%

Microstripline‐fed half‐cylindrical dielectric resonator antenna for 2.4‐GHz WLAN application

Kumar

Hamsakutty

Yohannan

et al. 2006

Micro & Optical Tech Letters

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In summary, we have demonstrated for the first time a gainclamped RFA using a pair of circulators for loss and dispersion compensation. The amplifier configuration utilizes a counter-propagating pump scheme at 1465 nm. The lasing-wavelength direction is designed to propagate in the opposite direction to that of the signal propagation. The gain-clamping level is controlled by adjusting the VOA attenuation. The proposed gain-clamped discrete-RFA produces good gain-and noise-figure variations of less than 0.4 and 0.5 dB, respectively. The NF penalty occurs in the proposed configuration is caused by the pump-signal RIN transfer. The stronger the gain-clamping effect, the stronger the laser oscillating the cavity. Thus, the interaction between the lasing wavelength and pump lights becomes stronger, thus creating additional noise within the signal band. This impairment must be considered when designing a gain-clamped discrete RFA in a ring cavity.ABSTRACT: A compact half-cylindrical dielectric resonator antenna (DRA) made from a high-permittivity ( r ϭ 69) ceramic material is investigated. A microstrip transmission line excites the DRA. The DRA shows broad and stable radiation characteristics across a matching band of 2.32 to 2.5 GHz with peak gains of 5.5 dBi in the elevation plane and 3.6 dBi in the azimuth plane. The results lead us to propose this DRA for 2.4-GHz WLAN (2.4 to 2.484 GHz) application.

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Wideband cylindrical dielectric resonator antenna excited using an L‐strip feed

Cited by 13 publications

References 3 publications

T-strip-fed high-permittivity rectangular dielectric resonator antenna for broadband applications

T-strip-fed high-permittivity rectangular dielectric resonator antenna for broadband applications

Compact Dielectric Resonator Antenna With Band-Notched Characteristics for Ultra-Wideband Applications

Microstripline‐fed half‐cylindrical dielectric resonator antenna for 2.4‐GHz WLAN application

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