A Multiple Resonant Frequencies Circular Reconfigurable Antenna Investigated with Wireless Powering in a Concrete Block

A novel broadband reconfigurable antenna design that can cover different frequency bands is presented. This antenna has multiple resonant frequencies. The reflection coefficient graphs for this antenna are presented in this paper. The new proposed design was investigated along with RF MEMS switches and the results are also presented. Investigations were carried out to check the efficiency of the antenna in the wireless powering domain. The antenna was placed in a concrete block and its result comparison to that of a dipole antenna is also presented in this paper.

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Reconfigurable Antenna using Micromechanical Actuation Switches for K and Ku-Band Applications

International Journal of Engineering and Advanced Technology - Regular Issue ◽

10.35940/ijeat.b2665.129219 ◽

2019 ◽

Vol 9 (2) ◽

pp. 201-205

Keyword(s):

Insertion Loss ◽

Patch Antenna ◽

Rf Mems ◽

Reconfigurable Antenna ◽

Resonant Frequencies ◽

Mems Switches ◽

Actuation Mechanism ◽

Rf Mems Switches ◽

Mechanical Actuation ◽

Ku Band

In this paper, we have proposed a reconfigurable antenna using micro mechanical actuation switches for K and Ku-band applications. Overall two identical cantilever micro mechanical switches (S1 & S2 ) are used to design reconfigurable patch antenna. The switches are working by electrostatic actuation mechanism. With the switches, overall the antenna is offering four resonant frequencies based on the switches ON/OFF condition. The Micro mechanical switches are offering an isolation loss of -18.5dB and an insertion loss of -1dB. The switch requires a DC actuation voltages of 6V. The Proposed reconfigurable antenna is resonating at four different frequencies based on the different switching conditions of RF MEMS switches. If S1 & S2 both are ON the antenna is resonating at 16.9GHZ, if S1 -ON & S2 -OFF the antenna is resonating at 47.3GHZ & 59.1GHZ, if S1 -OFF & S2 -ON the antenna is resonating at 28.4GHZ, if S1 -OFF & S2 -OFF the antenna is resonating at 27.9GHZ

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Application of genetic algorithm in M × N reconfigurable antenna array based on RF MEMS switches

Modern Physics Letters B ◽

10.1142/s0217984918503657 ◽

2018 ◽

Vol 32 (30) ◽

pp. 1850365 ◽

Cited By ~ 3

Author(s):

Wenchao Tian ◽

Daowei Wu ◽

Qiang Chao ◽

Zhiqiang Chen ◽

Yongkun Wang

Keyword(s):

Genetic Algorithm ◽

Wireless Communication ◽

Resonant Frequency ◽

Antenna Array ◽

Electromagnetic Compatibility ◽

Rf Mems ◽

Reconfigurable Antenna ◽

Target Frequency ◽

Mems Switches ◽

Rf Mems Switches

With the continuous development of the wireless communication, a device needs to integrate multiple antennas, which will lead to increased volume, increased cost, electromagnetic compatibility problems and increased weight. This paper presents a [Formula: see text] reconfigurable antenna array based on RF MEMS switches. The modeling script of [Formula: see text] reconfigurable antenna array is written in MATLAB by using MATLAB-HFSS-API. In order to quickly get a switch array with target frequency, genetic algorithm is applied to [Formula: see text] reconfigurable antenna array. Taking the [Formula: see text] reconfigurable antenna array as an example, a switch array with the resonant frequency of 3.81 GHz is searched from its 4096 switch arrays. The switch array found by genetic algorithm is 1 1 0 0 1 0 0 1 1 0 1 0. The resonant frequency and S11 parameter of this switch array is 3.81 GHz and −20.96 dB. The search takes 6.77 h and the efficiency is 17 times of the simulating all switch arrays.

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