EXPERIMENTAL STUDY OF VOLTAGE BREAKDOWN CHARACTERISTICS OF TRANSMITTING ANTENNAS
Abstract
The objective of this program is to evaluate the breakdown characteristics of selected microwave and VHF transmitting antennas under both ambient (cold air) and simulated reentry (plasma sheath including ablation effects) conditions at high altitude. The purpose of the program is to provide experimental data which will aid in selection of reentry jammers. The power- handling capabilities, the pattern of the radiated fields, and the input impedance of selected antennas which are compatible with the geometry of a conical reentry vehicle are to be determined. The modifications of the basic test cone model to accomodate additional plasma diagnostic instrumentation are described and the results of measurements of the radiation pattern of the X-band slot antenna/model configuration under free-space and anechoic chamber conditions are presented. Tests of the microwave and diagnostic instrumentation in the plasma tunnel are described and the design/fabrication status of the VHF antenna electrical instrumentation is reported.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1967
- Accession Number
- AD0828597
Entities
People
- Alan S. Penfold
- Richard C. Warder Jr.
- Richard M. Rosen