Open AccessTunable and flexible liquid spiral antennas
Author(s) -
Li Gaosheng,
Gao Gui,
Liu Wei,
Tian Zhihao
Publication year - 2017
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2016.4528
Subject(s) - spiral (railway) , materials science , directional antenna , spiral antenna , acoustics , electronic engineering , optics , computer science , optoelectronics , engineering , electrical engineering , physics , antenna (radio) , dipole antenna , mechanical engineering , coaxial antenna
A cylindrical spiral liquid antenna and a tapered helical water antenna are presented. Saline water with a concentration of 3.5% is injected into a flexible tube to form the radiation structure. Thresholds for changes of the radiation direction are calculated to be 0.1 and 0.4 for the ratio between the spiral diameter and the wavelength. Resonance frequency increases when the probe length or the radius of the vertical liquid decreases. The quantity of the water could be changed with the help of a syringe to enable the reconfigurability. Measurement results show fairly good agreements with that simulated.