EXPERIMENTAL INVESTIGATION OF THE CONICAL SPIRAL ANTENNA Open PDF Document Details Document Type Technical Report Publication Date May 25, 1957 Accession Number AD0144021 Entities People R. L. Carrel Organizations University of Illinois Urbana–Champaign Tags Communities of Interest Air Platforms DTIC Thesaurus Topics Abstracts Air Force Amplitude Antennas Current Density Electrical Engineering Engineering Frequency Illinois Impedance Measurement Polarization Radiation Radiation Patterns Rotation Spiral Antennas Universities