Novel improved metamaterial transmission line and its application in wideband leaky-wave antenna with wide beam-scanning angle range and low cross-polarization

Abstract In this paper, a leaky-wave antenna (LWA) with wide scanning angle and low cross-polarization is proposed based on a T-type folded substrate-integrated waveguide (FSIW). Transverse slots with a sinusoidal distribution pattern are etched on the surface of the FSIW so that transmission lines with slow-wave characteristics can excite and radiate −1 order harmonics. The length of the transverse slot affects the dispersion characteristics of the transmission line, and the sinusoidal modulation period controls the operating range of the LWA. In the frequency range of 8.3–15 GHz, the proposed LWA achieves a wide scanning ranging from backward −42° to forward +68° continuously. The cross-polarization of the beam is also kept at less than −30 dB during this scanning. A prototype is fabricated and measured to confirm the design, and the measured results show an agreement with the simulated one.

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Double-layered microstrip metamaterial beam scanning leaky wave antenna with consistent gain and low cross-polarization

Applied Physics A ◽

10.1007/s00339-017-1370-y ◽

2017 ◽

Vol 123 (12) ◽

Author(s):

Yong-li An ◽

Yi-li Tan ◽

Hong-bo Zhang ◽

Guo-cheng Wu

Keyword(s):

Cross Polarization ◽

Leaky Wave ◽

Beam Scanning ◽

Leaky Wave Antenna ◽

Wave Antenna

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Spoof Surface Plasmon Polaritons Leaky-Wave Antenna with Wide Beam Scanning Range

2020 9th Asia-Pacific Conference on Antennas and Propagation (APCAP) ◽

10.1109/apcap50217.2020.9246005 ◽

2020 ◽

Author(s):

Wenyu Ma ◽

Wenquan Cao ◽

Zuping Qian ◽

Rentang Hong

Keyword(s):

Surface Plasmon ◽

Surface Plasmon Polaritons ◽

Leaky Wave ◽

Beam Scanning ◽

Wide Beam ◽

Leaky Wave Antenna ◽

Wave Antenna ◽

Scanning Range ◽

Plasmon Polaritons ◽

Spoof Surface Plasmon Polaritons

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A Miniaturized Periodic Microstrip Leaky Wave Antenna with Shorting Pins

International Journal of Antennas and Propagation ◽

10.1155/2019/4068572 ◽

2019 ◽

Vol 2019 ◽

pp. 1-7

Author(s):

Bin Xi ◽

Yuanxin Li ◽

Yunliang Long

Keyword(s):

Transmission Line ◽

Propagation Constant ◽

Main Beam ◽

Leaky Wave ◽

Beam Scanning ◽

Antenna Size ◽

Leaky Wave Antenna ◽

Wave Antenna ◽

Effective Reduction ◽

Frequency Changes

A miniaturized periodic microstrip leaky wave antenna (MLWA) with shorting pins is proposed in this paper. The suggested antenna consists of a number of stubs that are periodically placed on the side of the transmission line, with the outside edges of the stubs being all integrated with shorting pins. In comparison with the whole-width stubs MLWA, the proposed antenna has an advantage of effective reduction in antenna size for the similar beam-scanning capability. A series of simple and effective equations were obtained to calculate the propagation constant and determine the operating band of the antenna. The consistency of the calculated and measured propagation constant confirms the validity of the parameter equations. As demonstrated by experimental results, the main beam scans electronically and continuously from 145° to 61° in the y-z plane as the operating frequency changes from 5.7 GHz to 11.7 GHz.

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