A new spiral frequency reconfigurable antenna with RF-MEMS switches for mobile RF front end

2015 ◽  
Vol 47 (2) ◽  
pp. 323-335 ◽  
Author(s):  
Paras Chawla ◽  
Rajesh Khanna
Keyword(s):  
Rf Mems ◽  
Reconfigurable Antenna ◽  
Mems Switches ◽  
Front End ◽  
Rf Front End ◽  
Rf Mems Switches ◽  
Frequency Reconfigurable Antenna

scholarly journals Analysis of RF Front-End Performance of Reconfigurable Antennas with RF Switches in the Far Field

2014 ◽  
Vol 2014 ◽  
pp. 1-14 ◽  
Author(s):  
Insu Yeom ◽  
Junghan Choi ◽  
Sung-su Kwoun ◽  
Byungje Lee ◽  
Changwon Jung
Keyword(s):  
Mobile Devices ◽  
Field Condition ◽  
Rf Mems ◽  
Reconfigurable Antennas ◽  
Reconfigurable Antenna ◽  
Far Field ◽  
Rf Switches ◽  
Mems Switches ◽  
Front End ◽  
Rf Front End

The RF front-end performances in the far-field condition of reconfigurable antennas employing two commonly used RF switching devices (PIN diodes and RF-MEMS switches) were compared. Two types of antennas (monopole and slot) representing general direct/coupled feed types were used for the reconfigurable antennas to compare the excited RF power to the RF switches by the reconfigurable antenna types. For the switching operation of the antennas, a biasing circuit was designed and embedded in the same antenna board, which included a battery to emphasize the antenna’s adaptability to mobile devices. The measurement results of each reconfigurable antenna (radiation patterns and return losses) are presented in this study. The receiving power of the reference antenna was measured by varying the transmitting power of the reconfigurable antennas in the far-field condition. The receiving power was analyzed using the “Friis transmission equation” and compared for two switching elements. Based on the results of these measurements and comparisons, we discuss what constitutes an appropriate switch device and antenna type for reconfigurable antennas of mobile devices in the far-field condition.

RF MEMS for Reconfigurable RF Front-End: Research in Australia

2014 ◽  
Vol 901 ◽  
pp. 105-110 ◽  
Author(s):  
Liang Gong ◽  
King Yuk Chan ◽  
Yi Yang ◽  
Rodica Ramer
Keyword(s):  
Rf Mems ◽  
Mems Switches ◽  
The Past ◽  
Front End ◽  
Rf Front End ◽  
Rf Mems Switches ◽  
Mems Technology ◽  
Front End Circuits ◽  
Rf Performance ◽  
Reconfigurable Filters

This paper reviews some ground breaking development of RF MEMS technology in Australia at the UNSW, over the past decade. It presents some unique and novel designs using RF MEMS switches to achieve reconfigurable RF front-end circuits. These designs include multiport RF MEMS switches, switch matrices, reconfigurable filters and antennas. The resulting devices achieved RF performance that is unmatched by any existing RF andmicrowave technologies.

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

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

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

2018 ◽  
Vol 32 (30) ◽  
pp. 1850365 ◽  
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.

scholarly journals Thermal analysis of RF-MEMS switches for power handling front-end

2005 ◽  
Author(s):  
F. Coccetti ◽  
B. Ducarouge ◽  
E. Scheid ◽  
D. Dubuc ◽  
K. Grenier ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Rf Mems ◽  
Mems Switches ◽  
Front End ◽  
Power Handling ◽  
Rf Mems Switches

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

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Shishir Shanker Punjala ◽  
Niki Pissinou ◽  
Kia Makki
Keyword(s):  
Reflection Coefficient ◽  
Rf Mems ◽  
Concrete Block ◽  
Dipole Antenna ◽  
Antenna Design ◽  
Reconfigurable Antenna ◽  
Resonant Frequencies ◽  
Mems Switches ◽  
Wireless Powering ◽  
Rf Mems Switches

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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