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Realization of Low Profile Leaky Wave Antennas Using the Bending Technique for Frequency Scanning and Sensor Applications

1
Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
2
EEIT Department, Vietnamese German University, Binh Duong 820000, Vietnam
3
Indian Institute of Technology (IIT), Bombay 400076, India
*
Author to whom correspondence should be addressed.
These authors have contributed equally to this work.
Sensors 2019, 19(10), 2265; https://doi.org/10.3390/s19102265
Received: 18 April 2019 / Revised: 10 May 2019 / Accepted: 11 May 2019 / Published: 16 May 2019
(This article belongs to the Special Issue Antenna Technologies for Microwave Sensors)
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Abstract

This paper proposes an efficient transmission line modulation by using the bending technique to realize low profile leaky wave antennas in the Ku-band for frequency scanning and sensor applications. The paper focuses mainly on the bending effects of the transmission line in terms of the sharpness of edges. The right-hand/left-hand transmission line can be designed in the form of zig-zag pattern with sharp corners and only the right-hand transmission line in the form of sinusoidal patterns with smooth corners. In this presentation, we demonstrate that transmission lines of this kind can be used to realize highly efficient leaky wave antennas with broadband impedance matching and high gain characteristics in the Ku-band. Dispersion analysis and ladder network analysis have been performed for investigating the performance of the proposed designs. The sharpness of the bends periodically distributed along the body of the antenna has been used to our advantage for frequency scanning in the left-hand and right-hand quadrants at different frequencies. The proposed bending technique has been proven to be instrumental in achieving the desired characteristics of low profile leaky wave antennas. View Full-Text
Keywords: transmission line; modes; leaky wave; scanning; dispersion; modulation transmission line; modes; leaky wave; scanning; dispersion; modulation
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Kandwal, A.; Nie, Z.; Wang, L.; Liu, L.W.Y.; Das, R. Realization of Low Profile Leaky Wave Antennas Using the Bending Technique for Frequency Scanning and Sensor Applications. Sensors 2019, 19, 2265.

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