Radiation characteristic of the periodic leaky wave structure and its application to leaky wave antenna design

Wang, Junhong; Geng, Yunjie; Zhang, Chong; Huo, Xingying

doi:10.1109/apmc.2015.7411769

Cited by 11 publications

(3 citation statements)

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“…The radiation condition and beam angle of the mth harmonic are [25] where λ 0 is the wavelength in free space, P is the period of slots, and ε g is an equivalent dielectric constant of the leaky waveguide, its expression is [26]…”

Section: Theory and Formulasmentioning

confidence: 99%

Dual-Beam Leaky-Wave Antenna Array With Capability of Fixed-Frequency Beam Switching

Wang

et al. 2020

IEEE Access

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A novel fixed-frequency beam switchable dual-beam antenna array is presented, which consists five dual-beam leaky-wave antenna (LWA) elements designed on substrate integrated waveguide (SIW) and integrated together on a common substrate. The LWAs work on fundamental wave and-1th spatial harmonic wave simultaneously and excite two symmetrical radiation beams in forward and backward direction respectively. In order to realize beam switching, three voltage-driven radio frequency chip switches (CSW-RFs) are used and integrated behind the antenna aperture. Since the periodic slot in LWA causes open stopband at the operating frequency, so the staggered radius amplification of local vias in the via walls of SIW is performed to suppress the open stopband. In addition, electromagnetic band-gap (EBG) structures, capable of reducing coupling between neighboring antenna elements, are embedded in between LWAs. The proposed dual-beam antenna array with beam switching capability between ±35, ±45, ±55, ±65 and ±75 degrees at 28 GHz are simulated, fabricated and measured. Both analysis and measurement results show that the proposed antenna array exhibits an excellent performance, which can be used in fixed-frequency beamswitching millimeter wave communication. INDEX TERMS Leaky wave antenna (LWA), dual-beam, open stopband suppression, beam switching, radio frequency chip switch.

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Section: Theory and Formulasmentioning

confidence: 99%

Dual-Beam Leaky-Wave Antenna Array With Capability of Fixed-Frequency Beam Switching

Wang

et al. 2020

IEEE Access

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“…In our previous works, the idea of superposing radiations from the n = −1 space harmonics of different periodic leaky-wave structures was proposed [14], a LWA array with broad-beam pattern [15] and a beam-formed LWA with the composite cosine-shaped slot [16] were designed based on this idea. In this paper, utilizing the same idea, a periodic FIGURE 2.…”

Section: Introductionmentioning

confidence: 99%

A Leaky-Wave Antenna Array With Beam-Formed Radiation Pattern for Application in a Confined Space

et al. 2019

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A substrate integrated waveguide (SIW) leaky-wave antenna (LWA) array with beam-formed radiation pattern is investigated in this paper. The array is composed of two LWA elements with different parameters of slots. For each LWA, the period of slots is selected first within the scope of only n = −1 space harmonic radiation to ensure the beam radiate in the desired direction. Then, the length of the slots is tapered according to the binomial aperture distribution to get the wide beam. Finally, the width of the slots is adjusted to get the desired radiation field strength. By superposing two wide beams from two elements in a weighting way, a cosecant-squared-like beam-formed radiation pattern is realized, which is preferable for the application of uniform radio wave coverage in a long straight confined space. The array is fabricated and measured, and the measured results are consistent with the simulated results. INDEX TERMS Antenna array, beam-formed radiation pattern, confined space, leaky-wave antenna (LWA), substrate integrated waveguide (SIW).

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“…Generally, LWAs are classified as uniform structures [5], [6] and periodic structures [7], [8] based on the guiding wave systems. A typical uniform LWA is usually designed based on wave-guiding structure supporting fast-wave on fundamental (n = 0) mode, whose beam can only scan in The associate editor coordinating the review of this manuscript and approving it for publication was Kai Lu .…”

Section: Introductionmentioning

confidence: 99%

Dual-Beam and Tri-Band SIW Leaky-Wave Antenna With Wide Beam Scanning Range Including Broadside Direction

Geng

Wang

et al. 2019

IEEE Access

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In this letter, a novel dual-beam and tri-band leaky-wave antenna (LWA) based on substrate integrated waveguide (SIW) structure is proposed, which has the capability of wide beam scanning range including broadside direction. The antenna consists of two kinds of periodic structures which can excite two -1st spatial harmonic waves and result in two radiation beams simultaneously. Through theoretical dispersion diagram analysis of the unit cells of two periodic structures and by applying the techniques of impedance-matching and reflection-cancelling, the open-stopbands at broadside are suppressed. Then the main beam of the proposed LWA can scan from backward to forward through broadside when frequency changes. Moreover, a tri-band application can be achieved in the dual-beam antenna by optimization of the second periodic structure. The measured results validate that the proposed SIW LWA has three operating frequency bands. In band 1 from 8.6 to 9.2 GHz, there is one beam scanning from 42 • to 71 • in the forward, in band 2 from 10 to 12 GHz, there is one beam scanning from -40 • to 4 • in the backward, and in band 3 from 12.5 to 15 GHz, there is a dual-beam scanning from -55 • to 54 • including broadside direction, which show good agreements with the simulated results. Dual-beam, tri-band, open-stopband (OSB), leaky-wave antenna (LWA), substrate integrated waveguide (SIW). INDEX TERMS

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Radiation characteristic of the periodic leaky wave structure and its application to leaky wave antenna design

Cited by 11 publications

References 0 publications

Dual-Beam Leaky-Wave Antenna Array With Capability of Fixed-Frequency Beam Switching

Dual-Beam Leaky-Wave Antenna Array With Capability of Fixed-Frequency Beam Switching

A Leaky-Wave Antenna Array With Beam-Formed Radiation Pattern for Application in a Confined Space

Dual-Beam and Tri-Band SIW Leaky-Wave Antenna With Wide Beam Scanning Range Including Broadside Direction

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