Investigations of SIW Leaky-Wave Antenna for Endfire-Radiation With Narrow Beam and Sidelobe Suppression

Liu, Juhua; Jackson, David R.; Li, Yuanxin; Zhang, Chaoqun; Long, Yunliang

doi:10.1109/tap.2014.2336659

Cited by 149 publications

(70 citation statements)

References 21 publications

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“…Thus, one may not be able to choose a structure that yields the desired A(z) distribution. Because of this, LWA designers often requires leaky-wave structures with independent control of both α(z) and β(z) [2], [3], [6], [13].…”

Section: Far-field Pattern Synthesismentioning

confidence: 99%

“…This analysis method has been used widely in the literature for design and pattern synthesis due to its simplicity and reasonable prediction on the antenna radiation patterns such as in [4]- [6]. Nevertheless, the analysis relies on simplifying assumptions, which have to be emphasized and recognized, otherwise inaccurate prediction on both near-field and far-field distributions could be obtained (these assumptions will be discussed in the next section).…”

Section: Introductionmentioning

confidence: 99%

“…The method shows higher flexibility in the design process compared to the classical LWA analysis approach [1]- [3]. Utilizing this method, a pattern synthesis can be carried out without the necessity of independent control on attenuation constant α(z) and phase constant β(z) along the antenna length, such as in [6], [13]. For illustration, two LWAs have been optimized targeting two different specifications, namely a low sidelobe level and a wide null in far-field pattern, applying the method on a simple leaky-structure, i.e.…”

Section: Introductionmentioning

confidence: 99%

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Transmission-Line Model of Nonuniform Leaky-Wave Antennas

Nguyen‐Trong

Hall

Fumeaux

2016

IEEE Trans. Antennas Propagat.

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Abstract-Non-uniform leaky-wave antennas (LWAs) are analyzed and synthesized using a lossy transmission line model. The analysis is based on a general waveguide circuit theory. Compared to the classical approach, the model yields a higher accuracy in the computation of both aperture field distribution and radiation patterns. The proposed analysis is also able to provide scattering parameters of the whole structure in a fraction of a second, which is valuable for antenna optimization. Based on the analysis, a general method for far-field pattern synthesis utilizing global optimization is presented. As an application demonstration, the Half-Mode Substrate-Integrated Waveguide, or half-width microstrip line, has been selected as basis structure for the LWA designs. Two antennas have been optimized targeting different specifications, i.e. a low sidelobe level and a wide null in the radiation pattern. Experimental results are provided for these selected examples of non-uniform LWAs, which ultimately validate the proposed technique as an improvement over the classical approach.Index Terms-Leaky-wave antenna (LWA), pattern synthesis, transmission line model, non-uniform structure, HalfMode Substrate-Integrated Waveguide (HMSIW), half-width microstrip line.

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Section: Far-field Pattern Synthesismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Transmission-Line Model of Nonuniform Leaky-Wave Antennas

Nguyen‐Trong

Hall

Fumeaux

2016

IEEE Trans. Antennas Propagat.

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“…Originally, this planar dielectric horn shares the poor matching and radiation characteristic of thin SIW substrates. To solve these problems and inspired by the approaches implemented in periodic leaky-wave strips and end-fire radiators [7], [8], we have placedprinted periodic strips both on the top and bottom planes of the substrate. These strips guide and leak the electromagnetic (EM) waves to strongly radiate along the end-fire direction.…”

Section: Introductionmentioning

confidence: 99%

“…These strips guide and leak the electromagnetic (EM) waves to strongly radiate along the end-fire direction. Unlike in [7] and [8], the EM waves are controlled not to leak out completely, leaving parts of the power at the horn aperture. So our dielectric horn antenna features radiation characteristics typical of both dielectric horns and end-fire leaky-wave dielectric waveguides.…”

Section: Introductionmentioning

confidence: 99%

Matching and gain enhancement of leaky-wave dielectric horn antenna

Wang

Garcia-Vigueras

Mosig

2016

2016 10th European Conference on Antennas and Propagation (EuCAP)

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International audienceBy flaring a dielectric waveguide in the H-plane, an H-plane dielectric horn is formed, which could be directly excited by an SIW feed. However, matching and radiation performances are poor due to the thinness of the substrate. To improve these performances, some periodic parallel strips are printed both on the top and bottom planes of the dielectric horn. These strips guide and leak the electromagnetic waves gradually along the horn, finally enhancing the end-fire radiation both in H-plane and E-plane. Moreover, they increase the impedance bandwidth up to 40% in Ka-band, and improve the realized gain by more than 2 dB. Indeed, a gain of 14.9 dBi is achieved at the center frequency, with a front-to-back ratio of 33.8 dB, and a side-lobe level of -22.9 dB in the H-plane. With these quite impressive performances, the proposed leaky-wave dielectric horn antenna is very compact, low cost, and easily integrated. © 2016 European Association of Antennas and Propagation

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Recent advances in theory and applications of substrate-integrated waveguides: A review

Sahu

Devabhaktuni

Mishra

et al. 2015

Int J RF and Microwave Comp Aid Eng

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The use of substrate integrated waveguides (SIW) for microwave and millimeter wave integrated components has increased dramatically over the last decade. They mimic the performance of conventional metallic waveguides and they are fabricated using printed circuit boards using the top and bottom metallization with two rows of vias forming the side walls. This creates a low profile, compact, and light weight alternative to conventional metallic waveguides, and they allow a direct interconnection with printed circuit boards and active components. This article reviews the fundamental theory, documents the research that has been performed over the past decade, and summarizes progress up to the recent state-of-the-art including novel SIW structures for passive circuits and antennas as well as new applications for reconfigurable and printed circuits using SIW technology.

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Investigations of SIW Leaky-Wave Antenna for Endfire-Radiation With Narrow Beam and Sidelobe Suppression

Cited by 149 publications

References 21 publications

Transmission-Line Model of Nonuniform Leaky-Wave Antennas

Transmission-Line Model of Nonuniform Leaky-Wave Antennas

Matching and gain enhancement of leaky-wave dielectric horn antenna

Recent advances in theory and applications of substrate-integrated waveguides: A review

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