Compact bilayer substrate integrated waveguide leaky wave antenna with dumbbell-shaped slot based on the TE20 mode
01 Aug 2019-International Journal of Rf and Microwave Computer-aided Engineering (John Wiley & Sons, Ltd)-Vol. 29, Iss: 8
About: This article is published in International Journal of Rf and Microwave Computer-aided Engineering.The article was published on 2019-08-01. It has received 10 citations till now. The article focuses on the topics: Leaky wave antenna & Waveguide (electromagnetism).
Citations
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TL;DR: The proposed feeding method takes the advantages of miniaturization of structure compared with the corporate-feed network by T-junctions, and eliminated undesirable surface current of the coaxial connector transition, which reduces lower side-lobe level at the antenna radiation pattern.
Abstract: In this paper, multilayer feeding network for linear slot array antenna is studied. A substrate integrated waveguide (SIW) corporate-feed network for linear slot array antenna based on three layers is presented. This design has eight right-handed circularly polarized radiation elements, one power divider with SMA connector to SIW adapter structure and six SIW power divider by coupling slot method. The feed network and antenna structures has been designed at X-band frequency. The SMA to SIW power divider and SIW power divider by coupling slot has in-phase and out-of-phase feature, respectively. The proposed feeding method takes the advantages of miniaturization of structure compared with the corporate-feed network by T-junctions. Also, proposed network for feeding radiation elements, eliminated undesirable surface current of the coaxial connector transition, which reduction of these currents causes lower side-lobe level at the antenna radiation pattern. Dimensions of manufacture array structure are 132.8 * 23 * 2.4 mm3 and the substrate is Rogers RO4003c. This antenna has the capability to expand the number of elements and feed network for achieving higher gain. Due to the unidirectional radiation pattern, this antenna useful for monopulse radar and automotive radar applications.
13 citations
TL;DR: In this paper, a multilayer microstrip patch antenna (MPA) fed by a substrate integrated waveguide (SIW) for X-band applications is presented, which consists of performing the feed network in the SIW and the radiating structure in the microstrip technology.
Abstract: In this article, the efficient development of a new class of multilayer microstrip patch antenna (MPA) fed by a substrate integrated waveguide (SIW) for X-band applications is presented. It consists of performing the feed network in the SIW and the radiating structure in the microstrip technology. The proposed structure demonstrates that the best alternative to a costly, heavy, and bulky rectangular waveguide feeder is an SIW, which provides miniaturization, performance enhancements, cost reductions, and ease of integration with MPAs. The proposed patch array is composed of three stacked layers from top to bottom, including two SIW layers as a feeding network and one layer as the antenna layer. To verify the concept of the proposed antenna, a prototype of a 2 × 2 SIW patch array with a 39 × 41 mm2 physical aperture was fabricated and measured with an impedance bandwidth of 9.18% for $\left|{{S}_{11}}\right|{ and a radiation efficiency above 78% in the whole operating frequency bandwidth. The maximum measured gain of the proposed array at 10 GHz is 11.1 dB, which is equivalent to 57.7% of the aperture efficiency. The proposed array can be easily developed to be used in larger arrays, and it is a good candidate for generating a symmetrical unidirectional pattern with a low cross-polarization level.
12 citations
TL;DR: In this paper, a compact multi-layer substrate integrated waveguide (SIW) monopulse antenna array operating at X-band was proposed, which consists of four stacked layers, including one layer for the radiating 4 × 4 rectangular microstrip antenna elements and two SIW layers for the comparator network.
Abstract: A compact multi-layer substrate integrated waveguide (SIW) monopulse antenna array operating at X-band is proposed. The structure consists of four stacked layers, including one layer for the radiating 4 × 4 rectangular microstrip antenna elements and two SIW layers for the comparator network. The sum and difference modes provide orthogonal radiation patterns in the azimuth and elevation planes. The two SIW layers of the comparator network feature a compact multi-feed design while maintaining high isolation between the antenna ports. To validate the proposed antenna concept, silmulations and measuremets are carried out. The obtained resuts show good performnces, a -10-dB impedance bandwidth of 13.45 % (9.35-10.7 GHz) for the sum and difference ports, better than 30 dB isolation between the antenna ports, the difference radiation patterns better than -38 dB null-depth. The comparison between the simulated and measuremed results shows a good agreement.
11 citations
10 citations
Cites methods from "Compact bilayer substrate integrate..."
...Therefore, the SIW has been an alternative for RWG as an attractive choice for microwave and mm-wave applications.(21,24) A novel two-layer SIW fed MPA array is reported in Ref....
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References
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TL;DR: In this article, a circularly symmetric power divider is described which splits a signal into n equiphase equiamplitude parts where n can be odd or even.
Abstract: A circularly symmetric power divider is described which splits a signal into n equiphase equiamplitude parts where n can be odd or even. The power divider provides isolation between output terminals and approximately matched terminal impedances over about a 20 per cent band. A theory of operation is given which yields the necessary design parameters, and an experimental model is described which has a minimum isolation of -27 db between output terminals, an output VSWR of 1.6, and an input VSWR of 1.2.
1,457 citations
"Compact bilayer substrate integrate..." refers background in this paper
...It is also an important component and key in measuring equipment, antenna array feeds, mixers, and other telecommunication systems.(28,29) Wilkinson power dividers play an important role in microwave circuits and wireless receivers such as phased array antenna, beam forming networks, array antennas, and mixers....
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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
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TL;DR: This paper gives a basic review and a summary of recent developments for leaky-wave antennas (LWAs), a guiding structure that supports wave propagation along the length of the structure, with the wave radiating or “leaking” continuously along the structure.
Abstract: This paper gives a basic review and a summary of recent developments for leaky-wave antennas (LWAs). An LWA uses a guiding structure that supports wave propagation along the length of the structure, with the wave radiating or “leaking” continuously along the structure. Such antennas may be uniform, quasi-uniform, or periodic. After reviewing the basic physics and operating principles, a summary of some recent advances for these types of structures is given. Recent advances include structures that can scan to endfire, structures that can scan through broadside, structures that are conformal to surfaces, and structures that incorporate power recycling or include active elements. Some of these novel structures are inspired by recent advances in the metamaterials area.
988 citations
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TL;DR: In this paper, an introduction history classification of leaky wave antennas is presented, along with a detailed discussion of the physics of Leaky Waves Radiation properties of one-dimensional and two-dimensional Leaky wave antenna.
Abstract: This chapter contains sections titled: Introduction History Classification of Leaky‐Wave Antennas Physics of Leaky Waves Radiation Properties of One‐Dimensional Leaky‐Wave Antennas Radiation Properties of Two‐Dimensional Leaky‐Wave Antennas Conclusions Acknowledgment References
792 citations
TL;DR: In this paper, the dispersion properties of the substrate integrated rectangular waveguide (SIRW) were rigorously obtained using the BI-RME method combined with the Floquet's theorem.
Abstract: Dispersion properties of the substrate integrated rectangular waveguide (SIRW) are rigorously obtained using the BI-RME method combined with the Floquet's theorem. Our analysis shows that the SIRW basically has the same guided-wave characteristics as the conventional rectangular waveguide. Empirical equations are derived from the calculated dispersion curves in order to estimate the cutoff frequency of the first two dominant modes of the SIRW To validate the analysis results, an SIRW guide was designed and measured. Very good agreements between the experimental and theoretical results were obtained.
776 citations
"Compact bilayer substrate integrate..." refers background in this paper
...As shown in Figure 1, the factors d (diameter of the vias), S (the period of via holes), and W (distance between the centers of the two opposite vias) are the most important parameters in the SIW design.(23,24) For certain values of S/λc and d/λc, (where λc is the cutoff wavelength of the structure), the SIW structure has a behavior similar to a rectangular waveguide....
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