Tunable leaky-wave antennas with RF MEMS

Kim, T.; Klapfenberger, R.; Vietzorreck, Larissa

doi:10.1109/ursi-emts.2016.7571509

Cited by 3 publications

(1 citation statement)

References 8 publications

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“…Familiar modulation methods, including varactor [23], ferrite [24], BST [25], MEMS [26] and mechanical tuning, are broadly applied in microwave and millimeter wave components. Compared with the forenamed tuning methods, LC features a wide application frequency range, convenient feeding and continuous linear tuning [27,28]. However, tunable microwave devices based on LC suffer from the singular tunable mode and the restricted tunable scope [29,30].…”

Section: Introductionmentioning

confidence: 99%

Electronic Beam Steering Metamaterial Antenna with Dual-Tuned Mode of Liquid Crystal Material

et al. 2023

Sensors

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In this study, a dual-tuned mode of liquid crystal (LC) material was proposed and adopted on reconfigurable metamaterial antennas to expand the fixed-frequency beam-steering range. The novel dual-tuned mode of the LC is composed of double LC layers combined with composite right/left-handed (CRLH) transmission line theory. Through a multi-separated metal layer, the double LC layers can be loaded with controllable bias voltage independently. Therefore, the LC material exhibits four extreme states, among which the permittivity of LC can be varied linearly. On the strength of the dual-tuned mode of LC, a CRLH unit cell is elaborately designed on three-layer substrates with balanced dispersion values under arbitrary LC state. Then five CRLH unit cells are cascaded to form an electronically controlled beam-steering CRLH metamaterial antenna on a downlink Ku satellite communication band with dual-tuned characteristics. The simulated results demonstrate that the metamaterial antenna features’ continuous electronic beam-steering capacity from broadside to −35° at 14.4 GHz. Furthermore, the beam-steering properties are implemented in a broad frequency band from 13.8 GHz to 17 GHz, with good impedance matching. The proposed dual-tuned mode can make the regulation of LC material more flexible and enlarge the beam-steering range simultaneously.

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Section: Introductionmentioning

confidence: 99%

Electronic Beam Steering Metamaterial Antenna with Dual-Tuned Mode of Liquid Crystal Material

et al. 2023

Sensors

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Miniaturized V-band circularly polarized leaky-wave antenna with continuous radiation coverage using modified waveguide and metasurface CSRRs

Torabi

Oraizi

Araghi

et al. 2023

Sci Rep

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A miniaturized V-band leaky-wave antenna (LWA) with circular polarization and backward-broadside-forward radiation based on a modified half-mode substrate integrated waveguide (M-HMSIW) is presented. The proposed M-HMSIW structure employs broadside coupled complementary split ring resonators to replace metallic vias, resulting in low-cost and fully-planar fabrication advantages over conventional HMSIWs. Each unit cell of the proposed LWA consists of an M-HMSIW in combination with two horizontal stubs and a cross-shaped complementary electric LC slot to provide a proper circular polarization with a composite right/left-handed property. Using this structure, the balanced condition can be obtained for the unit cell; hence a continuous backward-to-forward scanning, including broadside, is achieved. As a result, the proposed LWA with a radiator length of only 3.8 λ0 provides wide-angle beam scanning from − 53° to + 54° over the frequency range of 61.2 GHz to 73.4 GHz, while maintaining an excellent circular polarization between − 25° and 25°. The maximum gain of the LWA is 11.1 dB which is satisfactory, considering its compactness. The antenna’s performance is experimentally verified, and close agreement between the simulations and measurements is observed.

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A novel MEMS enabled μelectro-thermally actuated frequency tunable micrstrip patch antenna

Jafarpour

Ghavifekr

2017

2017 Iranian Conference on Electrical Engineering (ICEE)

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Tunable leaky-wave antennas with RF MEMS

Cited by 3 publications

References 8 publications

Electronic Beam Steering Metamaterial Antenna with Dual-Tuned Mode of Liquid Crystal Material

Electronic Beam Steering Metamaterial Antenna with Dual-Tuned Mode of Liquid Crystal Material

Miniaturized V-band circularly polarized leaky-wave antenna with continuous radiation coverage using modified waveguide and metasurface CSRRs

A novel MEMS enabled μelectro-thermally actuated frequency tunable micrstrip patch antenna

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