Radiation pattern and scattering parameter for multilayer cylindrical loop antenna using the iterative method WCIP

2019 ◽  
Vol 101 ◽  
pp. 192-199 ◽  
Author(s):  
Ines Jarboua ◽  
Noemen Ammar ◽  
Taoufik Aguili ◽  
Henri Baudrand
Keyword(s):  
Iterative Method ◽  
Radiation Pattern ◽  
Loop Antenna ◽  
Scattering Parameter

scholarly journals Balanced gain for a square metaloop antenna

2019 ◽  
Vol 6 ◽  
pp. 3
Author(s):  
Hisamatsu Nakano ◽  
Ittoku Yoshino ◽  
Tomoki Abe ◽  
Junji Yamauchi
Keyword(s):  
Frequency Response ◽  
Radiation Pattern ◽  
Free Space ◽  
Loop Antenna ◽  
Circularly Polarized ◽  
Left Handed ◽  
The Difference

A square loop antenna implemented using a metamaterial line, referred to as a metaloop, is discussed. The metaloop radiates a counter circularly polarized (CP) broadside beam when the loop circumference equals one guided wavelength. The frequency response of the gain shows two different maximum values: gain G Lmax for a left-handed CP wave at frequency fGLmax and gain GRmax for a right-handed CP wave at frequency fGRmax, where GLmax is smaller than GRmax. In order to increase GLmax, while not affecting the original GRmax as much as possible (i.e. balance the gain), a parasitic natural conducting loop (paraloop), whose circumference is one free-space wavelength at fGLmax, is placed at height Hpara above the metaloop. It is found that the difference in the gains can be reduced by choosing an appropriate Hpara. The radiation pattern at fGLmax is narrowed by the paraloop, while the VSWR is not remarkably affected.

Frequency tunable monopole coupled loop antenna with broadside radiation pattern

2009 ◽  
Vol 45 (23) ◽  
pp. 1149 ◽  
Author(s):  
M. Abdallah ◽  
L. Le Coq ◽  
F. Colombel ◽  
G. Le Ray ◽  
M. Himdi
Keyword(s):  
Radiation Pattern ◽  
Loop Antenna ◽  
Frequency Tunable ◽  
Broadside Radiation

Quasi-Unidirectional Radiation Pattern of Monopole Coupled Loop Antenna

2009 ◽  
Vol 8 ◽  
pp. 732-735 ◽  
Author(s):  
M. Abdallah ◽  
F. Colombel ◽  
G. Le Ray ◽  
M. Himdi
Keyword(s):  
Radiation Pattern ◽  
Loop Antenna

scholarly journals Design of Dual Band Sleeve Dipole Antenna for Mobile Jammer Applications

2015 ◽  
Vol 16 (1) ◽  
pp. 106
Author(s):  
Tariq Rahim ◽  
Jiaodong Xu
Keyword(s):  
Radiation Pattern ◽  
Dipole Antenna ◽  
Coaxial Cable ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Wireless Devices ◽  
Scattering Parameter ◽  
Directional Characteristics ◽  
Pass Through ◽  
Indoor And Outdoor

A multi band sleeve dipole antenna for jammer application is proposed. The antenna can cover band in which mobile and other wireless devices operate. The design antenna shows very good omni-directional characteristics and scattering parameter S11 value less than -10db. The dipole is made of two concentric hallow cylinder with different radius and different lengths. The antenna is fed at the center with coaxial cable pass through the bottom cylinder and thus avoids the use of complicated balun network. The impedance bandwidth and the radiation pattern are measured and analyzed both at 900 MHz and 1.8 GHz. The antenna can also be used GSM/DCS/WCDMA/CDMA2000/ TD-SCDMA /WLAN applications at both indoor and outdoor platform.

RADIATION FIELD OF AN ELLIPTIC LOOP ANTENNA WITH A CONSTANT CURRENT

1958 ◽  
Vol 36 (6) ◽  
pp. 672-676 ◽  
Author(s):  
S. C. Loh ◽  
J. Y. Wong
Keyword(s):  
Radiation Field ◽  
Radiation Pattern ◽  
Current Distribution ◽  
Loop Antenna ◽  
Constant Current ◽  
Elliptical Shape ◽  
Uniform Current ◽  
Uniform Current Distribution

Expressions for the radiation field are derived for a loop antenna of elliptical shape assuming a uniform current distribution. It is found that the radiation pattern in the plane of the loop depends on both the size and the shape of the antenna. However, for small loops, the radiation pattern is independent of the shape and is essentially circular. Some calculated patterns for loops of different sizes and shapes are presented in order to illustrate the derived results.

scholarly journals Plasma semiconductor antenna

2021 ◽  
Vol 2103 (1) ◽  
pp. 012187
Author(s):  
A S Brusentsev ◽  
N N Bogachev ◽  
S G Dogaev ◽  
S Yu Kazantsev ◽  
A I Sattarova ◽  
...  
Keyword(s):  
Reflection Coefficient ◽  
Laser Plasma ◽  
Return Loss ◽  
Satellite Navigation ◽  
Loop Antenna ◽  
Laser Source ◽  
Scattering Parameter ◽  
Loop Antennas ◽  
And Control ◽  
Plasma Control

Abstract The purposes of this work was to study the possibility of using photoconductive semiconductor antenna based on Ge or GaAs for receiving information signals in the frequency communications and satellite navigation bands and to study a scattering parameter S11 – a return loss (a reflection coefficient) of configurable loop antennas with laser-plasma control based on semiconductor photoresistor. It is shown that the addition of semiconductor photoresistor element in the loop antenna makes it possible to significantly expand its functionality and control its characteristics using an external laser source.

scholarly journals Flexible Hilbert-Curve Loop Antenna Having a Triple-Band and Omnidirectional Pattern for WLAN/WiMAX Applications

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Dang-Oh Kim ◽  
Che-Young Kim ◽  
Dae-Geun Yang
Keyword(s):  
Circular Polarization ◽  
Radiation Pattern ◽  
Loop Antenna ◽  
Hilbert Curve ◽  
Third Order ◽  
The Third ◽  
Flexible Loop ◽  
Loop Antennas ◽  
Antenna Factor ◽  
Triple Band

A triple-band flexible loop antenna is proposed for WLAN/WiMAX applications in this paper. The proposed antenna is formed by the third-order Hilbert-curve and bending type structure which provides flexible characteristics. Even though the radius of the curvature for bending antennas is changed, a triple-band feature still remains in the proposed antenna. Moreover, the antenna exhibits the characteristics of omnidirectional radiation pattern and circular polarization. To verify the receiving performance of antenna, a simulation on the antenna factor was conducted by an EM simulator. Based on these results, the suggested antenna makes a noteworthy performance over typical loop antennas.

scholarly journals Polarization and Radiation Pattern Reconfigurability of a Planar Monopole-Fed Loop Antenna for GPS Application

2016 ◽  
Vol 25 (4) ◽  
pp. 680-686 ◽  
Author(s):  
M. M. Fakharian ◽  
P. Rezaei ◽  
A. A. Orouji
Keyword(s):  
Radiation Pattern ◽  
Loop Antenna
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