Low frequency tunable metamaterial small antenna structure

2007 ◽  
Author(s):  
D.H. Lee ◽  
A. Chauraya ◽  
J.C. Vardaxoglou ◽  
W.S. Park
Keyword(s):  
Low Frequency ◽  
Antenna Structure ◽  
Frequency Tunable ◽  
Small Antenna ◽  
Tunable Metamaterial

scholarly journals An Ultra-Thin Low-Frequency Tunable Metamaterial Absorber Based on Lumped Element

2019 ◽  
Vol 27 (3) ◽  
pp. 579-584 ◽  
Author(s):  
G. W. Zhang ◽  
J. Gao ◽  
X. Y. Cao ◽  
H. H. Yang ◽  
L. R. Jidi
Keyword(s):  
Low Frequency ◽  
Metamaterial Absorber ◽  
Lumped Element ◽  
Frequency Tunable ◽  
Tunable Metamaterial

Designed 3D heterostructure by 0D/1D/2D hierarchy for low-frequency microwave absorption in the S-band

2022 ◽  
Author(s):  
Jun Zhou ◽  
Fan Guo ◽  
Jialiang Luo ◽  
Gazi Hao ◽  
Guigao Liu ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Three Dimensional ◽  
Low Frequency ◽  
Microwave Absorber ◽  
Tunable Microwave ◽  
Frequency Tunable ◽  
Electromagnetic Pollution ◽  
Designed Synthesis

Developing a low-frequency tunable microwave absorber for the normal use of sophisticated electric devices is an urgent need for electromagnetic pollution. Herein, we report the designed synthesis of a three-dimensional...

A Miniaturized 878 MHz Slotted Meander Line Monopole Antenna

2017 ◽  
Vol 7 (1) ◽  
pp. 170
Author(s):  
Nabilah Ripin ◽  
Ahmad Asari Sulaiman ◽  
Nur Emileen Abd Rashid ◽  
Mohamad Fahmi Hussin ◽  
Nor Najwa Ismail
Keyword(s):  
Simple Structure ◽  
Low Cost ◽  
Low Frequency ◽  
Monopole Antenna ◽  
Impedance Bandwidth ◽  
Antenna Size ◽  
Printed Monopole Antenna ◽  
Printed Monopole ◽  
Small Antenna ◽  
Meander Line

<p>A slotted meander line printed monopole antenna for low frequency applications at 878 MHz is presented. The operating frequency of the conventional printed monopole antenna was greatly reduced by the presence of the slots and meander line which lead to the reduction of the antenna size. The size reduction up to 70% compared to the conventional reference antenna is achieved in this study. The antenna has a simple structure and small antenna size of 46.8 mm x 74 mm or 0.137𝝀<sub>0</sub> x 0.217𝝀<sub>0</sub>. The antenna has been fabricated on the low-cost FR4 substrate and measured to validate the simulation performances. Measured results display that the proposed antenna produces omnidirectional radiation pattern of impedance bandwidth of 48.83 MHz and the maximum gain of -1.18 dBi.</p>

Low-frequency tunable locally resonant band gaps in acoustic metamaterials through large deformation

2020 ◽  
Vol 35 ◽  
pp. 100623 ◽  
Author(s):  
Shaowu Ning ◽  
Fengyuan Yang ◽  
Chengcheng Luo ◽  
Zhanli Liu ◽  
Zhuo Zhuang
Keyword(s):  
Large Deformation ◽  
Low Frequency ◽  
Band Gaps ◽  
Acoustic Metamaterials ◽  
Frequency Tunable

Multi-block electret-based mechanical antenna model for low frequency communication

2019 ◽  
Vol 10 (05) ◽  
pp. 1950036
Author(s):  
Bowen Liang ◽  
Yong Cui ◽  
Xiao Song ◽  
Liangya Li ◽  
Chen Wang
Keyword(s):  
Electromagnetic Waves ◽  
Rotation Speed ◽  
Model Simulation ◽  
Low Frequency ◽  
Signal Frequency ◽  
Entire System ◽  
Antenna Structure ◽  
Distribution Mode ◽  
The Relationship ◽  
Mechanical Movement

In an LF/VLF transmission system, the performance of the antenna is of great importance to the entire system. Currently, the electret-based mechanical LF/VLF antenna uses mechanical movement to accelerate electret charges to produce LF/VLF electromagnetic waves, and the frequency of these electromagnetic waves is limited by the rotation speed of the actuating motor. Based on research that addressed the relationship between antenna structure and electromagnetic wave frequency, this paper — in order to increase the frequency of electromagnetic waves — alters the charge distribution mode of the mechanical antenna while keeping the motor’s rotational speed constant to realize an increase of transmission signal frequency. The effectiveness of this method was verified by model simulation.

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