Demonstration of a highly efficient seawater antenna

Akimoto, Shimpei; Yanagi, Takashi; Fukasawa, Toru; Miyashita, Hidetoshi

doi:10.1109/apwc.2016.7738117

Cited by 4 publications

(2 citation statements)

References 5 publications

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“…Again, no frequency tuning was demonstrated, however, it is possible that by changing the tilt angle the resonance frequency may shift. In Reference [105], a similar tilted design was demonstrated to receive a broadcast signal.…”

Section: Static Vs Dynamicmentioning

confidence: 99%

A Review on Reconfigurable Liquid Dielectric Antennas

Motovilova

Huang

2020

Materials

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The advancements in wireless communication impose a growing range of demands on the antennas performance, requiring multiple functionalities to be present in a single device. To satisfy these different application needs within a limited space, reconfigurable antennas are often used which are able to switch between a number of states, providing multiple functions using a single antenna. Electronic switching components, such as PIN diodes, radio-frequency micromechanical systems (RF-MEMS), and varactors, are typically used to achieve antenna reconfiguration. However, some of these approaches have certain limitations, such as narrow bandwidth, complex biasing circuitry, and high activation voltages. In recent years, an alternative approach using liquid dielectric materials for antenna reconfiguration has drawn significant attention. The intrinsic conformability of liquid dielectric materials allows us to realize antennas with desired reconfigurations with different physical constraints while maintaining high radiation efficiency. The purpose of this review is to summarize different approaches proposed in the literature for the liquid dielectric reconfigurable antennas. It facilitates the understanding of the advantages and limitations of this technology, and it helps to draw general design principals for the development of reconfigurable antennas in this category.

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Section: Static Vs Dynamicmentioning

confidence: 99%

A Review on Reconfigurable Liquid Dielectric Antennas

Motovilova

Huang

2020

Materials

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“…Furthermore, these are expensive materials that are not suitable for low-cost systems. In the case of ionized water, NaCl was commonly used [12], [13], as it is abundantly available. In [14], KCl is proposed for the first time for fluid antennas achieving good matching and an efficiency of 70% at 2.75 GHz.…”

Section: Introductionmentioning

confidence: 99%

A Low-Cost Fluid Switch for Frequency-Reconfigurable Vivaldi Antenna

Borda-Fortuny

Tong

Al-Armaghany

et al. 2017

Antennas Wirel. Propag. Lett.

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A fluid switch is proposed for a frequency-agile Vivaldi antenna whose operating frequency band can be switched between two selected bands. A study of various ionized solutions of different concentrations is performed. A 2 mol KCl solution is selected as the fluid for the switch because of its relatively good properties in conductivity, relative permittivity, and loss tangent. The fluid-switched reconfigurable Vivaldi antenna can function well between two user-defined operating bands: 3.2 and 4.5 GHz with stable measured gain of 11 dBi in both bands and an isolation of 15 dB. This reconfigurable antenna demonstrates that a lowcost fluid switch may be an alternative device for reconfigurable antenna designs providing more flexibility.Index Terms-Ionized solutions, reconfigurable antennas.

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