Pixelated dual‐dipole antenna using electrically actuated liquid metal

2019 ◽  
Vol 55 (19) ◽  
pp. 1032-1034 ◽  
Author(s):  
K.J. Sarabia ◽  
A.T. Ohta ◽  
W.A. Shiroma
Keyword(s):  
Liquid Metal ◽  
Dipole Antenna ◽  
Electrically Actuated

scholarly journals Frequency-Reconfigurable Dipole Antenna Using Liquid-Metal Pixels

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Kent J. Sarabia ◽  
Sasha S. Yamada ◽  
Matthew R. Moorefield ◽  
Anthony W. Combs ◽  
Aaron T. Ohta ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Dipole Antenna ◽  
Half Wavelength ◽  
Electrically Actuated ◽  
Frequency Tunable

A frequency-tunable half-wavelength dipole antenna is realized using an array of electrically actuated liquid-metal pixels. The liquid-metal pixelated dipole antenna demonstrates frequency reconfigurability by switching between resonances at 2.51 GHz, 2.12 GHz, 1.85 GHz, and 1.68 GHz.

scholarly journals Microfluidically Frequency-Reconfigurable Quasi-Yagi Dipole Antenna

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 2935 ◽  
Author(s):  
Syed Shah ◽  
Sungjoon Lim
Keyword(s):  
Liquid Metal ◽  
High Gain ◽  
Dipole Antenna ◽  
Microfluidic Channels ◽  
Resonant Frequencies ◽  
Continuous Tuning ◽  
Microfluidic Technology ◽  
Peak Gain

In this paper, a frequency reconfigurable quasi-Yagi dipole antenna is proposed by leveraging the properties of microfluidic technology. The proposed antenna comprises a metal-printed driven dipole element and three directors. To tune resonant frequencies, microfluidic channels are integrated into the driven element. To maintain a high gain for all the tuned frequencies, microfluidic channels are also integrated into the directors. Therefore, the length of the driven-element as well as directors can be controlled by injecting liquid metal in the microfluidic channels. The proposed antenna has the capability of tuning the frequency by varying the length of the metal-filled channels, while maintaining a high gain for all the tuned frequencies. The proposed antenna’s performance is experimentally demonstrated after fabrication. The injected amount of liquid metal into the microfluidic channels is controlled using programmable pneumatic micropumps. The prototype exhibits continuous tuning of the resonant frequencies from 1.8 GHz to 2.4 GHz; the measured peak gain of the proposed antenna is varied in the range of 8 dBi to 8.5 dBi. Therefore, continuous tuning with high gain is successfully demonstrated using liquid-metal-filled microfluidic channels.

DESIGN AND CHARACTERIZATION OF THE LIQUID METAL ANTENNA OPTIMALLY EMBEDDED IN CONCRETE BEAM PROTOTYPE AS AN ALTERNATIVE STRAIN SENSOR

2016 ◽  
Vol 78 (5-9) ◽  
Author(s):  
Edmon O. Fernandez ◽  
Ira Valenzuela ◽  
John William Orillo
Keyword(s):  
Liquid Metal ◽  
Resonant Frequency ◽  
Concrete Beam ◽  
Microfluidic Channel ◽  
Strain Sensor ◽  
Concrete Specimen ◽  
Dipole Antenna ◽  
Loading Tests ◽  
Basic Characteristics ◽  
Metal Antenna

This paper presents the implementation of the novel dipole liquid metal antenna as an alternative strain sensor when embedded in the optimal location of a concrete beam prototype. The antenna is made up of eutectic Indium Gallium, a fluid metal alloy, encased in a microfluidic channel, namely, polydimethylsiloxane (PDMS) elastomer fabricated using McGyver-esque technique to microfabrication. The fluidic dipole antenna being highly flexible, stretchable, and reversibly deformable mimics the basic characteristics of the strain sensor where its resonant frequency is inversely related to its length. The concrete specimen was subjected to center – point loading tests where the resonant frequency of the liquid antenna embedded in it was measured simultaneously. Statistical analysis of the results show that there is a significant relationship between the displacement of the concrete specimen and the resonant frequency of the embedded antenna.

scholarly journals An Electrically Actuated DC-to-11-GHz Liquid-Metal Switch

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 1261-1266 ◽  
Author(s):  
Matthew R. Moorefield ◽  
Ryan C. Gough ◽  
Aaron T. Ohta ◽  
Wayne A. Shiroma
Keyword(s):  
Liquid Metal ◽  
Electrically Actuated

scholarly journals An Electrically Actuated Liquid-Metal Gain-Reconfigurable Antenna

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
George B. Zhang ◽  
Ryan C. Gough ◽  
Matthew R. Moorefield ◽  
Kareem S. Elassy ◽  
Aaron T. Ohta ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Duty Cycle ◽  
Reconfigurable Antenna ◽  
Antenna Gain ◽  
Electrically Actuated ◽  
External Power ◽  
5 Ghz ◽  
Metal Antenna

A tunable liquid-metal antenna demonstrating gain reconfigurability is presented. This antenna uses a reconfigurable stub made with the liquid metal Galinstan. Using continuous electrowetting, a 60 Hz signal with an amplitude of 1 Vpp and 75% duty cycle can actuate the Galinstan continuously along a channel, tuning the stub length and antenna gain. Zero external power is required to maintain the position of the slug. The 5 GHz antenna offers more than 10 dB of analog gain tuning, from −5.90 to 4.43 dB.

scholarly journals Pixelated reconfiguration using electrically actuated liquid metal

2018 ◽  
Vol 54 (4) ◽  
pp. 192-194 ◽  
Author(s):  
K.J. Sarabia ◽  
W.A. Shiroma ◽  
A.T. Ohta
Keyword(s):  
Liquid Metal ◽  
Electrically Actuated

A Controllable Untethered Vehicle Driven by Electrically Actuated Liquid Metal Droplets

2019 ◽  
Vol 15 (5) ◽  
pp. 2535-2543 ◽  
Author(s):  
Xiangxiang Li ◽  
Jie Xie ◽  
Shi-Yang Tang ◽  
Ronald Xu ◽  
Xiangpeng Li ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Electrically Actuated ◽  
Metal Droplets

An electrically actuated liquid-metal switch with metastable switching states

2016 ◽  
Author(s):  
George B. Zhang ◽  
Ryan C. Gough ◽  
Matthew R. Moorefield ◽  
Aaron T. Ohta ◽  
Wayne A. Shiroma
Keyword(s):  
Liquid Metal ◽  
Electrically Actuated
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