Dielectric resonator loaded substrate integrated waveguide cavity backed slot antenna for bandwidth enhancement
19 Jul 2015-pp 2337-2338
TL;DR: In this paper, a substrate integrated waveguide cavity backed slot antenna with dielectric resonator loading in X-band is presented, and the peak gain of proposed antenna is about 5.6 dBi with maximum cross polarized radiation level of −30 dB.
Abstract: In this paper, a substrate integrated waveguide cavity backed slot antenna with dielectric resonator loading in X-Band is presented. With loading, enhanced impedance bandwidth (S 11 < −10 dB) of about 11.74% is obtained without much affecting its gain and radiation pattern. The peak gain of proposed antenna is about 5.6 dBi with maximum cross polarized radiation level of −30 dB. The simulation of proposed antenna is carried out in Ansys HFSS.
Citations
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TL;DR: In this paper, the authors considered unidirectional reflector-backed slot configurations with parallel-plate mode suppression by shorting pins and presented a stripline-fed rectangular slot element with radiation efficiency of more than 80% and a bandwidth of about 5% at center frequency 10GHz.
Abstract: . Slots in metallic ground planes are very promising candidates for conformal antenna applications. However, a low-profile unidirectional antenna requires a back reflector close to the slot and the resulting stripline feed causes strong excitation of parallel-plate modes. In this contribution, we consider unidirectional reflector-backed slot configurations with parallel-plate mode suppression by shorting pins. Starting from a parametric study with respect to shorting pin location and back reflector distance, we present a stripline-fed rectangular slot element with radiation efficiency of more than 80% and a bandwidth of about 5% at centre frequency 10GHz. A careful optimisation of shorting pin locations guarantees reliable parallel-plate mode suppression without deteriorating the slot radiation behaviour. Coupling coefficients between parallel and aligned rectangular slot elements are presented. For increased bandwidth applications, a bow-tie slot element with about 8% bandwidth and radiation efficiency of close to 80% is proposed.
37 citations
01 Dec 2016
TL;DR: In this paper, a planar substrate integrated waveguide (SIW) cavity backed slot antenna for wideband application is presented, which uses SIW cavity hybrid modes to realize the wideband response which are excited by long bow tie shaped slot antenna loading at the top plate of the cavity.
Abstract: In this paper, a planar substrate integrated waveguide (SIW) cavity backed slot antenna for wideband application is presented The proposed antenna uses SIW cavity hybrid modes to realize the wideband response which are excited by long bow tie shaped slot antenna loading at the top plate of the cavity To excite more than two hybrid modes in the proposed design, an additional SIW cavity is placed and excited through an aperture in the common sidewall between them As a result, three hybrid modes are excited in the design which excite the slots to radiate with wideband response The proposed antenna is fed by simple microstrip line and exhibits a bandwidth of 156 GHz (156%) covering X-band Radio navigation, Radio location applications while maintaining unidirectional radiation pattern and a gain above 41 dBi throughout the operating bandwidth of the antenna The fabricated prototype of the antenna is implemented in a thin substrate (height ∼ 0026λ 0 ) which makes it attractive for conformal applications
11 citations
Cites background from "Dielectric resonator loaded substra..."
...The bandwidth of the SIW cavity backed antenna is further improved up to 11% by loading with dielectric resonator antenna in [14]....
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...5 to ensure electromagnetic shielding within the cavity [14]....
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01 Apr 2020-Microsystem Technologies-micro-and Nanosystems-information Storage and Processing Systems
TL;DR: In this paper, a low profile substrate integrated waveguide based circular-shaped cavity-backed antenna is delineated to work at WLAN U-NII mid band and a slender rectangular slot is then placed at its center on the ground plane for radiation.
Abstract: In the paper, a low profile substrate integrated waveguide based circular-shaped cavity-backed antenna is delineated to work at WLAN U-NII mid band and a slender rectangular slot is then placed at its center on the ground plane for radiation. The parent antenna radiates at 5.33 GHz with a gain of 4.9 dBi; depicting a narrow impedance bandwidth of 50 MHz. The antenna is modified by placing dielectric resonators of different shapes over the slot to enhance the bandwidth. The new antennas thus produced have an impedance bandwidth of 750 MHz with cylindrical-shaped and rectangular-shaped dielectric resonators which reflect bandwidth enhancement of 700 MHz for both the cases and an impedance bandwidth of 710 MHz with hemispherical-shaped dielectric resonator reflecting bandwidth enhancement of 660 MHz. The gain of the modified antennas is of the order of 4.7 dBi which basically indicates not much degradation in gain as compared to the parent antenna. All the antennas are delineated using Arlon AD270 substrate material with the results obtained after simulation juxtaposed with the ones obtained through measurement.
11 citations
Journal Article•
TL;DR: In this paper, a design approach to improve the impedance bandwidth of cavity backed dumbbell slot antenna using Substrate Integrated Waveguide for X band (8-12 GHz) application is presented.
Abstract: The Dielectric Resonator Antenna (DRA) is one of the efficient radiator which is used to achieve broadband and cost effective communication in wireless technology. The Substrate Integrated Waveguide (SIW) technology is the most assuring structure for implementation of circuits and components for millimeter wave and microwave applications. A design approach to improve the impedance bandwidth of cavity backed dumbbell slot antenna using Substrate Integrated Waveguide for X band (8-12 GHz) application is presented in this paper. The proposed design improves impedance bandwidth by the use of Cylindrical Dielectric Resonator Antenna and metal strip along with offset feeding technique. The performance characteristics of the proposed antenna design is evaluated and studied.
9 citations
References
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TL;DR: In this article, the authors provide an overview of the recent advances in the modelling, design and technological implementation of SIW structures and components, as well as their application in the development of circuits and components operating in the microwave and millimetre wave region.
Abstract: Substrate-integrated waveguide (SIW) technology represents an emerging and very promising candidate for the development of circuits and components operating in the microwave and millimetre-wave region. SIW structures are generally fabricated by using two rows of conducting cylinders or slots embedded in a dielectric substrate that connects two parallel metal plates, and permit the implementation of classical rectangular waveguide components in planar form, along with printed circuitry, active devices and antennas. This study aims to provide an overview of the recent advances in the modelling, design and technological implementation of SIW structures and components.
1,129 citations
TL;DR: In this paper, a low profile cavity backed planar slot antenna has been described, which is completely constructed at a single substrate by using substrate integrated waveguide technique and grounded coplanar waveguide.
Abstract: A novel design method of low profile cavity backed planar slot antenna has been described in this paper. The whole antenna including backed cavity and feeding element is completely constructed at a single substrate by using substrate integrated waveguide technique and grounded coplanar waveguide. An example with 1.7% bandwidth has been presented, which has 5.4 dBi gain, 16.1 dB front-to-back ratio and -19 dB maximum cross polarized radiation level with its total thickness less than lambda0/50. The proposed antenna keeps good radiation performance of conventional cavity backed antenna and has advantages of conventional planar antenna including low profile, light weight, easy fabrication with low cost and convenient integration with planar circuit.
402 citations
01 Oct 2002
TL;DR: In this article, a substrate integrated waveguide (SIW) cavity directly coupled to a planar circuit, i.e., a microstrip line or coplanar waveguide, is presented.
Abstract: A substrate integrated waveguide (SIW) cavity directly coupled to a planar circuit, i.e. microstrip line or coplanar waveguide, is presented. Different coupling topologies and coupling probes are discussed. Empirical equations to predict the resonance frequencies of the cavity are provided. A temperature stability coupling topology were fabricated and measured. Finally, as an example of potential applications, a filter using two SIW cavities was designed and measured.
110 citations
TL;DR: In this article, a loaded rectangular cavity slot antenna is analyzed using variational methods in conjunction with simplified equivalent circuit techniques to derive accurate design guides for efficiency, bandwidth, and resonant frequency.
Abstract: The loaded rectangular cavity slot antenna is analyzed using variational methods in conjunction with simplified equivalent circuit techniques to derive accurate design guides for efficiency, bandwidth, and resonant frequency. The aperture admittance is computed and the effects of a compound aperture plane iris and of material loading are analyzed. The aperture admittance of all such loaded cavity antennas is proportional to \mu_{r} , \sqrt{\mu_{r}/\epsilon_{r}} , or 1/\epsilon_{r} , which characteristic lends to a common method of optimization of |T|^{2} (transmission cofficient). Experimental results include: 1) measurements of aperture field; 2) a comparison of theoretical and experimental value of bandwidth, efficiency, resonant frequency, and beam pattern for several experimental models; and 3) the measurement of the effect of applied dc magnetic field.
80 citations
TL;DR: In this paper, the authors investigated unidirectional reflector-backed slot configurations with parallel-plate mode suppression by shorting pins and presented a stripline-fed rectangular slot element with radiation efficiency of more than 80%, a bandwidth of about 5% at a center frequency of 10 GHz.
Abstract: Slot apertures in metallic ground planes are very attractive candidates for conformal antenna applications. However, a low-profile unidirectional antenna requires a backreflector close to the slot aperture and the resulting stripline feed causes strong excitation of parallel-plate modes. In this paper, we investigate unidirectional reflector-backed slot configurations with parallel-plate mode suppression by shorting pins. Starting from a parametric study with respect to shorting pin location and backreflector distance, we present a stripline-fed rectangular slot element with radiation efficiency of more than 80%, a bandwidth of about 5% at a center frequency of 10 GHz. For increased bandwidth applications, a bow-tie slot element with about 8% bandwidth and radiation efficiency of close to 80% is proposed.
54 citations