A dual band CRLH leaky wave antenna with electrically steerable beam based on liquid crystals

Che, Bang-Jun; Meng, Fan‐Yi; Fu, Jiahui; Zhang, Kuang; Yang, Guohui; Wu, Qun

doi:10.1109/cefc.2016.7816091

Cited by 4 publications

(2 citation statements)

References 2 publications

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“…There is an obvious demand for antennas with a low profile, high directivity, and the feasibility of scanning at multi-band frequencies. In this paper, we propose a methodology for designing a small-sized dual-band or multiple band antenna, which in essence overcomes the above problems, and due to its compactness, it can be used for many applications in the frequency of operation [1,2,3,4,5,6].…”

Section: Introductionmentioning

confidence: 99%

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

Kandwal

Nie

Wang

et al. 2019

Sensors

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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.

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Section: Introductionmentioning

confidence: 99%

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

Kandwal

Nie

Wang

et al. 2019

Sensors

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“…Besides conventional PCB substrates, recent developments in LWA designs have shown the possibility of designing CLRH LWA by using liquid crystals. For example, in [15,16], the authors present CRLH LWA made of injected liquid crystals with the beam steering achieved through an external electric field. As opposed to the proposed LWA, the use of liquid crystals requires very high bias voltage and the beam steering is limited to 20-30 degrees.…”

Section: Introductionmentioning

confidence: 99%

A Miniaturized Reconfigurable CRLH Leaky-Wave Antenna Using Complementary Split-Ring Resonators

Patron

Liu

Dandekar

2018

Journal of Electrical and Computer Engineering

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Composite Right-/Left-Handed (CRLH) Leaky-Wave Antennas (LWAs) are a class of radiating elements characterized by an electronically steerable radiation pattern. The design is comprised of a cascade of CRLH unit cells populated with varactor diodes. By varying the voltage across the varactor diodes, the antenna can steer its directional beam from broadside to backward and forward end-fire directions. In this paper, we discuss the design and experimental analysis of a miniaturized CRLH Leaky-Wave Antenna for the 2.4 GHz WiFi band. The miniaturization is achieved by etching Complementary Split-Ring Resonator (CSRR) underneath each CRLH unit cell. As opposed to the conventional LWA designs, we take advantage of a LWA layout that does not require thin interdigital capacitors; thus we significantly reduce the PCB manufacturing constraints required to achieve size reduction. The experimental results were compared with a nonminiaturized prototype in order to evaluate the differences in impedance and radiation characteristics. The proposed antenna is a significant achievement because it will enable CRLH LWAs to be a viable technology not only for wireless access points, but also potentially for mobile devices.

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Leaky-Wave Antenna With Wide Scanning Range Based on Double-Layer Substrate Integrated Waveguide

Peng

Zhang

et al. 2020

IEEE Access

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A leaky-wave antenna (LWA) based on the double-layer substrate integrated waveguide (SIW) that has a wide scanning range within a narrow bandwidth is proposed. The LWA consists of two layers, each of which consists of multiple elemental SIWs arranged in parallel at each layer while the direction of the SIWs in the two layers are at an oblique angle to each other. The elemental top layer SIWs are connected to those in the bottom layer though parallelogram-shaped slots, so that the two layers together form a double-layer SIW. Thin slots etched on the upper surface of each elemental SIW of the top layer act as radiating structures. As the phase difference between the radiating slots of adjacent elemental SIWs can be enlarged by the waveguide length, wide-angle beam scanning is achieved within a specific frequency bandwidth. The proposed LWA has a scanning range from -58 • to 49 • in a relative bandwidth of 6.45%, from 12.75 GHz to 13.6 GHz. The scanning rate (SR), defined as the scanning range divided by the relative bandwidth, is up to 16.5. The size of structure is compact, which is 4.0λ 0 × 3.6λ 0 × 0.04 λ 0 . The proposed LWA is suitable for radar or communication system applications.INDEX TERMS Leaky-wave antenna, beam scanning, substrate integrated waveguide, relative bandwidth, scanning rate, compact size.

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A dual band CRLH leaky wave antenna with electrically steerable beam based on liquid crystals

Cited by 4 publications

References 2 publications

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

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

A Miniaturized Reconfigurable CRLH Leaky-Wave Antenna Using Complementary Split-Ring Resonators

Leaky-Wave Antenna With Wide Scanning Range Based on Double-Layer Substrate Integrated Waveguide

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