AN INVESTIGATION OF THE NEAR FIELDS ON THE CONICAL EQUIANGULAR SPIRAL ANTENNA
Abstract
The current distribution has been measured on a conical equiangular spiral antenna. A correlation between the operation of the conical logspiral antenna and the operation of the uniform circular bifilar helix is established by utilizing a general theory of backward wave radiation from periodic structures. Operation beyond the normal frequency limits has been explored and discussed. The arms of the antenna were constant diameter conductors. The effects of this deviation from the ideal design, which calls for a linearly increasing diameter, have been observed. The far field measurements, giving for example the center of phase location, agrees with the near field probing. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1962
- Accession Number
- AD0276463
Entities
People
- O.l. Mclelland
Organizations
- University of Illinois Urbana–Champaign