DocumentCode
1982709
Title
Polarization Properties of the Helix Antenna
Author
Andersen, J. Bach
Author_Institution
Institute of Electronic Systems, Aalborg University Centre, Aalborg, Denmark.
fYear
1981
fDate
7-11 Sept. 1981
Firstpage
751
Lastpage
756
Abstract
The mode structure and surface fields of a helix with a dielectric core have been found. Conditions for constructing an antenna with perfect circular polarization in all directions have been identified and by defining a circular polarization index (CPI) optimum antennas may be found. The CPI essentially measures the degree of satisfaction of the Rumsey-conditions, ¿ = ±jZoH¿, for the surface fields. With a price of a smaller bandwith the presenc~ of a suitable dielectric is able to improve the wide angle polarization properties of the helix antenna.
Keywords
Antenna feeds; Antenna measurements; Dielectrics; Directive antennas; Frequency; Helical antennas; Polarization; Reflector antennas; Surface waves; Wires;
fLanguage
English
Publisher
ieee
Conference_Titel
Microwave Conference, 1981. 11th European
Conference_Location
Amsterdam, Netherlands
Type
conf
DOI
10.1109/EUMA.1981.333013
Filename
4131708
Link To Document