The Effect of Shape of Artificial Ground on Antenna Radiation Pattern

The article deals with an effect the change of shape of non-directional antenna's artificial ground plane has on the shape of its radiation diagram. In naval and aerial transportation, the artificial ground plane is the plane's fuselage or ship's hull. Experimental measurements of ant...

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Bibliographic Details
Published in:Naše more znanstveni časopis za more i pomorstvo 2018-09, Vol.65 (3), p.157-163
Main Authors: Kalapoš, Gabriel, Schreiner, Michal, Krchňák, Martin, Moravec, Tomáš, Češkovič, Marek, Labun, Ján
Format: Article
Language:English
Subjects:
Airframes
Amplitude
Amplitudes
antenna
Antenna radiation patterns
Antennas
artificial ground
Communication
Communications systems
Computer simulation
Dimensions
Directional antennas
Fuselages
Ground plane
magnitude
Measurement techniques
Motivation
Ova
phase
Phase transitions
Radiation
radiation pattern
Ratios
Shape
Shape effects
Ship hulls
Ships
Transportation
Vehicles
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Summary:The article deals with an effect the change of shape of non-directional antenna's artificial ground plane has on the shape of its radiation diagram. In naval and aerial transportation, the artificial ground plane is the plane's fuselage or ship's hull. Experimental measurements of antenna's amplitude and phase ratios are presented in the article. These point to the fact that even a small change of artificial ground plane's shape has a big impact on the shape of its radiation diagram. The shape was gradually changed from circular to ellipsoidal. This ellipsoidal shape was used because the ground plan of a plane or a ship can be simplified to a slender ellipse. It is generally known that dimensions of the artificial ground plane influence the directional diagram of the antenna. However, this change occurs as a result of phase ratios changes of emitted signal on the surface of the artificial ground plane. The knowledge gained in this area can contribute to a better understanding of the topic. This could change the view on the shapes of radiation diagrams of antennas placed on vehicles of complex shapes. The motivation of the article was a real requirement for placing an antenna of a new communication system on a complex plane fuselage. The article compares measurements of amplitude and phase ratios of two antenna systems in 2D and 3D view.
ISSN:0469-6255
1848-6320
DOI:10.17818/NM/2018/3.5