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

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

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 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 Planar Printed Shorted Monopole Antenna with Coupled Feed for LTE/WWAN Mobile Handset Applications

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Do-Gu Kang ◽  
Youngje Sung
Keyword(s):  
Radiation Pattern ◽  
Monopole Antenna ◽  
Loop Antenna ◽  
Operating Bandwidth ◽  
Mobile Handset

A shorted monopole antenna with coupled feed for LTE/WWAN mobile handset applications is described. The basic resonance of the shorted monopole combines with the resonance formed by the coupling between the coupling strip and the feeding pad to cover the LTE700, GSM850, and GSM900 bands. Both the feeding pad and the coupling strip operate with the shorting strip as a loop antenna. The resonance of the loop antenna and the harmonics of the shorted monopole combine to cover the GSM1800, GSM1900, UMTS, and LTE2300 bands. A stable and omnidirectional radiation pattern with reasonable gain has been observed over the operating bandwidth.

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