Folded microstrip antenna with isotropic radiation pattern

In contrast to existing antennas with polarization and directional characteristics, we propose a novel isotropic antenna that provides equivalent vertical and horizontal polarization in all directions. The final design was guided by simulations, with the performance characteristics of the fabricated...

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Bibliographic Details
Published in:Microwave and optical technology letters 2021-11, Vol.63 (11), p.2859-2865
Main Authors: Choi, Dong‐Su, Choi, Yoon‐Seon, Ju, Dae‐Keun, Jung, Bang Chul, Woo, Jong‐Myung
Format: Article
Language:English
Subjects:
Antenna radiation patterns
folded microstrip antenna
Horizontal polarization
Impedance matching
Input impedance
isotropic antenna
Microstrip antennas
Microstrip transmission lines
nondirectional radiation pattern
Radiation
Resonant frequencies
vertical and horizontal polarization
Vertical polarization
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Summary:In contrast to existing antennas with polarization and directional characteristics, we propose a novel isotropic antenna that provides equivalent vertical and horizontal polarization in all directions. The final design was guided by simulations, with the performance characteristics of the fabricated antenna verified experimentally. In the proposed antenna, two λ/4 folded microstrip antennas were integrated into one antenna in a “+” shape to generate the isotropic radiation pattern, with the input impedance matched to the feeding position. The resonant frequency, horizontal width, radiation pattern, and axis ratio were adjusted by changing the length of the microstrip line. Both simulations and experiments confirmed that the radiation patterns of vertical and horizontal polarization on each plane show the characteristics of an isotropic antenna with nondirectional radiation pattern.
ISSN:0895-2477
1098-2760
DOI:10.1002/mop.32992