A Wide-Angle Narrowband Leaky-Wave Antenna Based on Substrate Integrated Waveguide-Spoof Surface Plasmon Polariton Structure

This paper proposes a wide-angle beam scanning leaky-wave antenna (LWA) fed by a novel spoof surface plasmon polaritons (SSPP) transmission line (TL). In the proposed LWA, circular metallic patches are periodically loaded on both sides of the SSPP TL alternately, and convert guided waves into radiating waves. The transmission characteristics of the proposed SSPP TL are analyzed, and the transmission characteristics and radiation patterns of the proposed LWA are simulated and measured. The simulated and measured results show that the proposed LWA provides approximately 12.5 dBi of radiation gain within a frequency range of 8–24 GHz, and a beam scanning range of 90° from forward to backward continuously by increasing the feeding frequency. The proposed LWA, based on a novel SSPP TL, has advantages of single-layer conductor, continuous wide-angle beam scanning, and high gain especially at the broadside direction, which are difficult realize using conventional LWAs.

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A Compact Wide-Angle Frequency Beam-Scanning Antenna Using Modulated Composite Waveguide Based on Half-Mode Substrate Integrated Waveguide and Spoof Surface Plasmon Polariton Structure

AEU - International Journal of Electronics and Communications ◽

10.1016/j.aeue.2021.154078 ◽

2021 ◽

pp. 154078

Author(s):

Shiquan Wang ◽

Kwok L. Chung ◽

Fanmin Kong ◽

Liuge Du ◽

Kang Li

Keyword(s):

Surface Plasmon ◽

Surface Plasmon Polariton ◽

Wide Angle ◽

Substrate Integrated Waveguide ◽

Beam Scanning ◽

Plasmon Polariton ◽

Scanning Antenna

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Wide-angle Frequency Scanning Antenna Achieved by Leaking Spoof Surface Plasmon Polariton

Frequenz ◽

10.1515/freq-2019-0173 ◽

2020 ◽

Vol 74 (5-6) ◽

pp. 183-190

Author(s):

Manlan Deng

Keyword(s):

Surface Plasmon ◽

Slow Wave ◽

Surface Plasmon Polariton ◽

Wave Radiation ◽

Wide Angle ◽

Leaky Wave ◽

Beam Scanning ◽

Frequency Scanning ◽

Plasmon Polariton ◽

Scanning Antenna

AbstractInspired by the theory of leaky wave antenna, a broadband and wide-angle frequency scanning antenna is proposed in this paper. My goal is to trade a narrow frequency band for a wide-angle beam scanning. Since the dispersion of spoof surface plasmon polariton (SSPP) mode slow-wave possesses larger gradient than that of the waves in the air, the metallic corrugated line (MCL) is adopted for energy transmission. To convert confined slow-wave into radiated fast-wave, a number of metallic patches are alternatively and periodically loaded besides the MCL and fed by electrically coupling. Owing to the frequency-dispersive phase difference between two patches, the resultant radiations are capable of beam scanning. As an example, the fabricated prototype operates in a relative bandwidth of 19.5 % (from 7.4 GHz to 9.0 GHz). Both the simulated and measured results have verified that the main beam of leaky-wave radiation can continuously scan from the backward direction to the forward direction with a scanning angular domain of 56° and an average gain level of 12.0 dB.

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