A 3D-Printed Hybrid Water Antenna with Tunable Frequency and Beamwidth

A novel hybrid water antenna with tunable frequency and beamwidth is proposed. An L-shaped metallic strip is adopted as the feeding structure of the antenna in order to effectively broaden the operating bandwidth. The L-shaped strip feeder and a rectangular water dielectric resonator constitute the driven element. Five identical rectangular water dielectric elements are mounted linearly with respect to the driven element, which act as the directors and contribute to narrow the beamwidth. By varying the height of the liquid water level in the driven element, the proposed antenna is able to tune to different operational frequencies. Furthermore, it is also able to adjust to different beamwidths and gains via varying the number of director elements. A prototype is fabricated by using 3-D printing technology, where the main parts of the antenna are printed with photopolymer resin, and then the ground plane and L-shaped strip feeder are realized by using adhesive copper tapes. Measurement results agree well the simulation ones. A tunable frequency ranging from 4.66 GHz to 5.65 GHz is obtained and a beam steering along a fixed direction with a gain variation less than 0.5 dB is realized.

[1]  Emanuel Guariglia,et al.  Entropy and Fractal Antennas , 2016, Entropy.

[2]  Joel D. Barrera,et al.  A Fluidic Loading Mechanism in a Polarization Reconfigurable Antenna With a Comparison to Solid State Approaches , 2014, IEEE Transactions on Antennas and Propagation.

[3]  Chow-Yen-Desmond Sim,et al.  Lightweight Perforated Waveguide Structure Realized by 3-D Printing for RF Applications , 2017, IEEE Transactions on Antennas and Propagation.

[4]  Jia-Jun Liang,et al.  An Azimuth-Pattern Reconfigurable Antenna Based on Water Grating Reflector , 2018, IEEE Access.

[5]  Paul A. Warr,et al.  A Frequency-Reconfigurable Antenna Architecture Using Dielectric Fluids , 2015, IEEE Transactions on Antennas and Propagation.

[6]  A pattern‐reconfigurable water‐loaded MIMO antenna , 2017 .

[7]  Lei Xing,et al.  A Wideband Hybrid Water Antenna With an F-Shaped Monopole , 2015, IEEE Access.

[8]  Guan-Long Huang,et al.  Fabrication of a High-Efficiency Waveguide Antenna Array via Direct Metal Laser Sintering , 2016, IEEE Antennas and Wireless Propagation Letters.

[9]  Aaron T. Ohta,et al.  A Liquid-Metal Monopole Array With Tunable Frequency, Gain, and Beam Steering , 2013, IEEE Antennas and Wireless Propagation Letters.

[10]  Yi Huang,et al.  Complex Permittivity of Water-Based Liquids for Liquid Antennas , 2016, IEEE Antennas and Wireless Propagation Letters.

[11]  K. Vasudevan,et al.  An Electronically Reconfigurable Microstrip Antenna With Switchable Slots for Polarization Diversity , 2011, IEEE Transactions on Antennas and Propagation.

[12]  G. Vecchi,et al.  A Multiresolution Approach to Contoured-Beam Antennas , 2007, IEEE Transactions on Antennas and Propagation.

[13]  Yi Huang,et al.  A Broadband Hybrid Water Antenna for Hand-Portable Applications , 2016, IEEE Antennas and Wireless Propagation Letters.

[14]  Ying Liu,et al.  A Compact Frequency-Reconfigurable Patch Antenna for Beidou (COMPASS) Navigation System , 2014, IEEE Antennas and Wireless Propagation Letters.

[15]  Emanuel Guariglia,et al.  Harmonic Sierpinski Gasket and Applications , 2018, Entropy.

[16]  Zhongxiang Shen,et al.  High-Efficiency Sea-Water Monopole Antenna for Maritime Wireless Communications , 2014, IEEE Transactions on Antennas and Propagation.

[17]  Guang-Zhong Yang,et al.  3D Printed Microfluidic Device with Integrated Biosensors for Online Analysis of Subcutaneous Human Microdialysate , 2015, Analytical chemistry.

[18]  Kamran Entesari,et al.  A Microfluidically Reconfigurable Dual-Band Slot Antenna With a Frequency Coverage Ratio of 3:1 , 2016, IEEE Antennas and Wireless Propagation Letters.

[19]  Guan-Long Huang,et al.  Design of a Compact Wideband Feed Cluster With Dual-Polarized Sum- and Difference-Patterns Implemented via 3-D Metal Printing , 2018, IEEE Transactions on Industrial Electronics.

[20]  Kwai-Man Luk,et al.  A Water Dense Dielectric Patch Antenna , 2015, IEEE Access.

[21]  Qing-Xin Chu,et al.  A slot-coupled water-based stacked-patch antenna for wireless communications , 2016, 2016 IEEE International Conference on Computational Electromagnetics (ICCEM).