Intelligent quadrifilar helix antenna
β Scribed by Leach, S.M.; Agius, A.A.; Saunders, S.R.
- Book ID
- 114455063
- Publisher
- The Institution of Electrical Engineers
- Year
- 2000
- Tongue
- English
- Weight
- 468 KB
- Volume
- 147
- Category
- Article
- ISSN
- 1350-2417
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## Abstract An omnidirectional quadrifilar helix antenna (QHA) with parasitic helical strips for circular polarization (CP) is proposed and experimentally investigated for handheld mobile terminals. This antenna is small in size, low cost, and lightweight. The mutual coupling effect between the gro
In this paper, different methods for measuring the input ( ) impedance of a quadrifilar helix QFH antenna are presented along with the underlying physical theory. Shortcomings of the known slotted line method are discussed. New practical and efficient ways of the input impedance deri¨ation based on