Design of Filtering Tunable Liquid Crystal Phase Shifter Based on Spoof Surface Plasmon Polaritons in PCB Technology

Ding, Chuxiong; Meng, Fan‐Yi; Han, Jian-Qiao; Mu, Huilin; Fang, Qinghe; Wu, Qun

doi:10.1109/tcpmt.2019.2943149

Cited by 21 publications

(15 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Depending on the type of order of the molecules, there exist different states or mesophases in which LCs can be found: nematic, smetic and cholesteric [26,29]. From all the mentioned states, nematic LCs have demonstrated to be particularly useful for the design of reconfigurable radio-frequency devices, such as filters [30,31,32], antennas [6,33,34,35], and phase shifters [9,36,37]. In a nematic LC, molecules are oriented in the same average direction, represented by the director n and the average tilt angle θ m .…”

Section: Liquid Crystalmentioning

confidence: 99%

Dispersion Analysis of Periodic Structures in Anisotropic Media: Application to Liquid Crystals

Alex‐Amor

Palomares‐Caballero

Mesa

et al. 2022

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

This paper presents an efficient method to compute the dispersion diagram of periodic structures with generic anisotropic media. The method takes advantage of the ability of full-wave commercial simulators to deal with finite structures having anisotropic media. In particular, the proposed method opens new possibilities with respect to commercial eigenmode solvers: (i) anisotropic materials with non-diagonal permittivity and permeability tensors can be analyzed; (ii) the attenuation constant can easily be computed and lossy materials can be included in the simulation; (iii) unbounded and radiating structures such as leakywave antennas can be treated. In this work, the proposed method is particularized for the study of liquid crystals (LCs) in microwave and antenna devices. Since LCs show promising capabilities for the design of electronically reconfigurable elements, the dispersion properties of a great variety of LC-based configurations are analyzed, from canonical structures, such as waveguide and microstrip, to complex reconfigurable phase shifters in ridge gap-waveguide technology and leaky-wave antennas. Our results have been validated with previously reported works in the literature and with the Eigenmode solver of commercial software CST.

show abstract

Section: Liquid Crystalmentioning

confidence: 99%

Dispersion Analysis of Periodic Structures in Anisotropic Media: Application to Liquid Crystals

Alex‐Amor

Palomares‐Caballero

Mesa

et al. 2022

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

show abstract

“…As mentioned in section 2.1, by loading SRRs or other resonant structures, specific stopbands can be introduced into the transmission band of SSPPs to form a passive band stop filter. Later, Wu et al changed the dielectric substrate into liquid crystal (LC) material whose dielectric constant can be adjusted with voltage in figure 18(a) [103]. This method changed the propagation constant of SSPPs by influencing the electrical size of SSPP structure, and then reconstructed the stop band position, as illustrated in figure 18(b).…”

Section: Reconfigurable Sspp Filtering Devicesmentioning

confidence: 99%

Spoof surface plasmonics: principle, design, and applications

Cheng

Wang

You

et al. 2022

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

Surface plasmon polaritons (SPPs) are interactions between incident electromagnetic (EM) waves and free electrons on the metal-dielectric interface in the optical regime. To mimic SPPs in the microwave frequency, spoof SPPs (SSPPs) on ultrathin and flexible corrugated metallic strips were proposed and designed, which also inherit the advantages of lightweight, conformal, low profile, and easy integration with the traditional microwave circuits. In this paper, we review the recent development of SSPPs, including the basic concept, design principle, and applications along with the development from unwieldy waveguides to ultrathin transmission lines. The design schemes from passive and active devices to SSPP systems are presented respectively. For the passive SSPP devices, the related applications including filters, splitters, combiners, couplers, topological SSPPs, and radiations introduced. For the active SSPP devices, from the perspectives of transmission and radiation, we present a series of active SSPP devices with diversity and flexibility, including filtering, amplification, attenuation, nonlinearity, and leaky-wave radiations. Finally, several microwave systems based on SSPPs are reported, showing their unique advantages. The future directions and potential applications of the ultra-thin SSPP structures in the microwave and millimeter-wave regions are discussed.

show abstract

“…Applying bias voltage from 0 to 100 V, the LC molecules experience a nearly 90°reorientation, resulting in a continuous and reversible frequency shift from 9.91 GHz down to 9.55 GHz in the magnetic resonance of the metamaterial. Besides, Ding et al reported a new design of filtering a tunable LC phase shifter based on spoof surface plasmon polaritons [110] , showing self-embedded fixed filtering performance and continuously tunable phase shifts.…”

Section: Reconfigurable Metasurfaces Based On Liquid Crystalsmentioning

confidence: 99%

Electrically reconfigurable microwave metasurfaces [Invited]

et al. 2022

View full text Add to dashboard Cite

Metasurfaces are ultrathin metamaterials constructed by planar meta-atoms with tailored electromagnetic responses. They have attracted tremendous attention owing to their ability to freely control the propagation of electromagnetic waves. With active elements incorporated into metasurface designs, one can realize tunable and reconfigurable metadevices with functionalities controlled by external stimuli, opening up a new platform to dynamically manipulate electromagnetic waves. In this article, we review the recent progress on tunable and reconfigurable metasurfaces, focusing on their operation principles and practical applications. We describe the approaches to the engineering of reconfigurable metasurfaces categorized into different classes based on the available active materials or elements, which can offer uniform manipulations of electromagnetic waves. We further summarize the recent achievements on programmable metasurfaces with constitutional meta-atoms locally tuned by external stimuli, which can dynamically control the wavefronts of electromagnetic waves. Finally, we discuss time-modulated metasurfaces, which are meaningful to exploit the temporal dimension by applying a dynamic switching of the coding sequence. The review is concluded by our outlook on possible future directions and existing challenges in this fast developing field.

show abstract

Design of Filtering Tunable Liquid Crystal Phase Shifter Based on Spoof Surface Plasmon Polaritons in PCB Technology

Cited by 21 publications

References 30 publications

Dispersion Analysis of Periodic Structures in Anisotropic Media: Application to Liquid Crystals

Dispersion Analysis of Periodic Structures in Anisotropic Media: Application to Liquid Crystals

Spoof surface plasmonics: principle, design, and applications

Electrically reconfigurable microwave metasurfaces [Invited]

Contact Info

Product

Resources

About