Low-Loss Circularly Polarized Periodic Leaky-Wave Antenna

Sánchez‐Escuderos, Daniel; Ferrando‐Bataller, Miguel; Herranz, Jose I.; Peñarrocha, Vicent Miquel Rodrigo

doi:10.1109/lawp.2015.2463672

Cited by 39 publications

(17 citation statements)

References 11 publications

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“…Very recently, researchers have highlighted the propagation of terahertz waves on a single bare metal wire 7 . Thereafter, a planar implementation of the Goubau line on a thin dielectric substrate was widely explored and applied to low-loss transmission lines 8 , 9 , leaky-wave antennas 10 , 11 and so on. Low-loss transmission property of Goubau line has been demonstrated and validated in submillimeter wave frequency band and even in the terahertz frequency band 12 , 13 .…”

Section: Introductionmentioning

confidence: 99%

“…In the work 10 , a linear dipole array was loaded along the Goubau line as a periodic perturbation to the original mode so that it can radiate into the air. The planar dipole sources were later replaced by the crossed dipoles for exciting circularly polarized leaky waves 11 . Nevertheless, it should be noticed that the gain and radiation efficiency degradation at broadside is a major issue in all periodic LWAs, including Goubau line LWAs in refs 10 , 11 .…”

Section: Introductionmentioning

confidence: 99%

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Continuous Beam Steering Through Broadside Using Asymmetrically Modulated Goubau Line Leaky-Wave Antennas

Tang

Zhang

et al. 2017

Sci Rep

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Goubau line is a single-conductor transmission line, featuring easy integration and low-loss transmission properties. Here, we propose a periodic leaky-wave antenna (LWA) based on planar Goubau transmission line on a thin dielectric substrate. The leaky-wave radiations are generated by introducing periodic modulations along the Goubau line. In this way, the surface wave, which is slow-wave mode supported by the Goubau line, achieves an additional momentum and hence enters the fast-wave region for radiations. By employing the periodic modulations, the proposed Goubau line LWAs are able to continuously steer the main beam from backward to forward within the operational frequency range. However, the LWAs usually suffer from a low radiation efficiency at the broadside direction. To overcome this drawback, we explore both transversally and longitudinally asymmetrical modulations to the Goubau line. Theoretical analysis, numerical simulations and experimental results are given in comparison with the symmetrical LWAs. It is demonstrated that the asymmetrical modulations significantly improve the radiation efficiency of LWAs at the broadside. Furthermore, the measurement results agree well with the numerical ones, which experimentally validates the proposed LWA structures. These novel Goubau line LWAs, experimentally demonstrated and validated at microwave frequencies, show also great potential for millimeter-wave and terahertz systems.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Continuous Beam Steering Through Broadside Using Asymmetrically Modulated Goubau Line Leaky-Wave Antennas

Tang

Zhang

et al. 2017

Sci Rep

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“…Figure 11 shows the measured LHCP E-plane patterns of the proposed antenna from 12 GHz to 15 GHz with a step of 0.5 GHz. It can be observed that the proposed antenna exhibits a continuous frequency beam-scanning ranging from −2 to 47 in the interested frequency band (12)(13)(14)(15). The comparison between the measured and simulated ARs in the direction of the main beam at different frequencies is presented in Figure 12.…”

Section: Simulation and Experiments Resultsmentioning

confidence: 97%

“…In addition, this proposed antenna owns wideband CP beam-steering capability over 40 (−2 to 47 ) with an average gain of 11 dBic, while its gain does not vary significantly with frequency. The gain flatness is less than 2 dB in the operating frequency band (12)(13)(14)(15).…”

Section: Discussionmentioning

confidence: 94%

“…9,10 Therefore, the CP LWA is a good candidate for the inter vehicle communication in intelligent transportation system and the communication based train control system. [11][12][13] This article proposes a wideband beam scanning CP LWA based on the PRGW structure. In this design, the mature plating via technology is applied to realize the RGW structure.…”

Section: Introductionmentioning

confidence: 99%

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Wideband circularly polarized leaky‐wave antenna with flat gain using printed ridge gap waveguide

Shi

Zhang

Ding

2019

Int J RF Microw Comput Aided Eng

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A wideband beam scanning circularly polarized (CP) leaky-wave antenna (LWA) at Ku band is proposed based on the printed ridge gap waveguide (PRGW). In this design, the printed technology is used to realize the ridge gap waveguide (RGW) structure, and a substrate layer is introduced to replace the air gap layer in conventional RGWs. The proposed beam scanning CP LWA has been fabricated. Measured results of the fabricated antenna prototype are carried out to verify the simulation analysis. It provides a wide impedance bandwidth of 22% ranging from 12 to 15 GHz while performing continuous frequency beam scanning from −2 to +47 . Furthermore, it maintains the excellent CP characteristic with axial ratio (AR) below 1.5 dB and a flat gain response with variation less than 2 dB in the entire operation frequency band. K E Y W O R D S beam scanning, circular polarization, leaky-wave antenna, printed ridge gap waveguide

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Leaky-Wave Antennas

Preez

Sinha

2016

Millimeter-Wave Antennas: Configurations and Applications

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Low-Loss Circularly Polarized Periodic Leaky-Wave Antenna

Cited by 39 publications

References 11 publications

Continuous Beam Steering Through Broadside Using Asymmetrically Modulated Goubau Line Leaky-Wave Antennas

Continuous Beam Steering Through Broadside Using Asymmetrically Modulated Goubau Line Leaky-Wave Antennas

Wideband circularly polarized leaky‐wave antenna with flat gain using printed ridge gap waveguide

Leaky-Wave Antennas

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