Design of SIW cavity backed slot antenna for wideband application
01 Dec 2016-pp 1-4
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
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
TL;DR: In this article, a half-mode substrate integrated waveguide (HMSIW)-based cavity-backed slot antenna is proposed for unlicensed National Information Infrastructure (U-NII, 5.180-5.825GHz) band.
Abstract: In this study, a wideband half-mode substrate integrated waveguide (HMSIW)-based cavity-backed slot antenna is proposed for Unlicensed National Information Infrastructure (U-NII, 5.180-5.825GHz) band. To reduce the size of the antenna, an HMSIW backing cavity is used. An epsilon-shaped radiating slot is etched on the top plane of the cavity to achieve a wide -10dB impedance bandwidth of 13.2% (5.092-5.817GHz). A planar exponential tapered feeding technique is used to excite the slot. A wideband is realised by coupling of hybrid mode, TM
210
mode, and modified TM
020
modes at the resonant frequencies of 5.2, 5.5, and 5.8GHz, respectively. The size of the proposed design including a feeding network is 56mm × 32mm (1.4
λ
g1
× 0.8
λ
g1
). The proposed design is fabricated and experimentally tested. The experimental results show gains of 6.6, 6, and 5.5 dBi and efficiencies of 91, 89, and 87% at the frequencies of 5.2, 5.5, and 5.8GHz, respectively, with front-to-back ratio better than 15dB. Moreover, the proposed antenna shows a unidirectional radiation pattern including the advantages of low-profile and lightweight with planar integrity which makes the proposed antenna a favourable candidate for wireless fidelity application.
33 citations
TL;DR: In this paper, a novel design of wideband planar substrate integrated waveguide (SIW) cavity-backed antenna (CBA) consisting of amended dumbbell-shaped slot and two cylindrical metal vias is developed.
Abstract: In this article, a novel design of wideband planar substrate integrated waveguide (SIW) cavity-backed antenna (CBA) consisting of amended dumbbell-shaped slot and two cylindrical metal vias is developed. The simple dumbbell slot perturbs the current distribution of the both TE110 and TE210 cavity modes and generates the three independent modes (half-TE110, even-TE210, and odd-TE210) at distinct frequencies. When the two metallic vias are loaded at the middle portion of the SIW cavity and due to simultaneous excitation, two hybrid modes come close to each other. These hybrid modes serve to widen the fractional bandwidth upto 17.36%. The bandwidth is further extended by modifying the simple dumbbell slot. A specimen is fabricated to validate the amended dumbbell-shaped slot experimentally. The proposed antenna offers two resonances and exhibits a fractional bandwidth of 22.4% (2.25 GHz). The antenna renders measured peak gains of 6.45 dBi and 6.2 dBi at 9.2 GHz and 10.6 GHz, respectively. Furthermore, the proposed design shows the front-to-back-ratio 14 dB and cross-polar levels –28 dB and –37 dB maximum at both the measured frequencies. Those amicable characteristics, e.g., low-profile, low cross-polarization levels, unidirectional radiation pattern, and wide impedance bandwidth, make the proposed antenna appropriate for X-band applications.
12 citations
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
19 May 2019
TL;DR: The SIW technology permits to adopt a number of antenna topologies featuring several advantages in terms of reconfigurability and dynamic performance, which becomes extremely beneficial in the synthesis of modern phased array configurations.
Abstract: This paper addresses a number of technological and theoretical aspects of employing the Substrate Integrated Waveguide (SIW) technology in the design and implementation of the antenna section of different communication systems operating at millimeter-wave (mm-W) frequencies. An SIW-oriented design presents a number of immediate advantages, such as a massive reduction in system complexity, antenna isolation enhancement, and low-cost implementation. Moreover, the SIW technology permits to adopt a number of antenna topologies featuring several advantages in terms of reconfigurability and dynamic performance, which becomes extremely beneficial in the synthesis of modern phased array configurations.
2 citations
Cites methods from "Design of SIW cavity backed slot an..."
...Indeed, the use of a planar structure enclosed in a cavity could lead to reduced bandwidth of a SIW cavity-backed antenna respect to a conventional patch radiator; in order to overcome this problem, some bandwidth enhancement techniques have been studied, as described in [14, 15]....
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References
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17 Jan 2005
TL;DR: In this article, a numerical multimode calibration procedure is proposed and developed with a commercial software package on the basis of a full-wave finite-element method for the accurate extraction of complex propagation constants of the SIW structure.
Abstract: The substrate integrated waveguide (SIW) technique makes it possible that a complete circuit including planar circuitry, transitions, and rectangular waveguides are fabricated in planar form using a standard printed circuit board or other planar processing techniques. In this paper, guided wave and modes characteristics of such an SIW periodic structure are studied in detail for the first time. A numerical multimode calibration procedure is proposed and developed with a commercial software package on the basis of a full-wave finite-element method for the accurate extraction of complex propagation constants of the SIW structure. Two different lengths of the SIW are numerically simulated under multimode excitation. By means of our proposed technique, the complex propagation constant of each SIW mode can accurately be extracted and the electromagnetic bandstop phenomena of periodic structures are also investigated. Experiments are made to validate our proposed technique. Simple design rules are provided and discussed.
1,356 citations
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
"Design of SIW cavity backed slot an..." refers background in this paper
...With the advent of Substrate Integrated Waveguide (SIW) technology, a new research direction to implement non-planar waveguide based microwave circuits in planar substrate is in high demand now-a-days [4]....
[...]
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
"Design of SIW cavity backed slot an..." refers background in this paper
...The realization of SIW cavity backed slot antenna is proposed in [5]....
[...]
TL;DR: In this paper, a low-profile substrate integrated waveguide (SIW) cavity-backed slot antenna is presented, where two hybrid modes, whose dominant fields are located in different half parts of the SIW cavity are two different combinations of the and resonances.
Abstract: A bandwidth enhanced method of a low-profile substrate integrated waveguide (SIW) cavity-backed slot antenna is presented in this paper. Bandwidth enhancement is achieved by simultaneously exciting two hybrid modes in the SIW-backed cavity and merging them within the required frequency range. These two hybrid modes, whose dominant fields are located in different half parts of the SIW cavity, are two different combinations of the and resonances. This design method has been validated by experiments. Compared with those of a previously presented SIW cavity-backed slot antenna, fractional impedance bandwidth of the proposed antenna is enhanced from 1.4% to 6.3%, its gain and radiation efficiency are also slightly improved to 6.0 dBi and 90%, and its SIW cavity size is reduced about 30%. The proposed antenna exhibits low cross polarization level and high front to back ratio. It still retains advantages of low-profile, low fabrication cost, and easy integration with planar circuits.
254 citations
"Design of SIW cavity backed slot an..." refers background in this paper
...To achieve further improvement in bandwidth performance, excitation of hybrid cavity mode is reported in [10] which helps to achieve 6....
[...]
TL;DR: In this article, a bow-tie-shaped slot antenna is proposed to induce strong loading effect in the cavity and generate two closely spaced hybrid modes that help to get a broadband response.
Abstract: A novel design technique for broadband substrate integrated waveguide cavity-backed slot antenna is demonstrated in this letter. Instead of using a conventional narrow rectangular slot, a bow-tie-shaped slot is implemented to get broader bandwidth performance. The modification of the slot shape helps to induce strong loading effect in the cavity and generates two closely spaced hybrid modes that help to get a broadband response. The slot antenna incorporates thin cavity backing (height <;0.03λ
0
) in a single substrate and thus retains low-profile planar configuration while showing unidirectional radiation characteristics with moderate gain. A fabricated prototype is also presented that shows a bandwidth of 1.03 GHz (9.4%), a gain of 3.7 dBi over the bandwidth, 15 dB front-to-back ratio, and cross-polarization level below -18 dB.
152 citations
"Design of SIW cavity backed slot an..." refers background or methods in this paper
...However, a technique to load SIW cavity with long bow-tie slot antenna is described in [11] where significant perturbation by the slot loading in the cavity helps to modify the cavity modes....
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...In [11], bow-tie slot antenna loading in SIW cavity is proposed to improve the bandwidth of the antenna up to 9....
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