The effects of mode impurity of Ka-band system performance
Abstract
Problems associated with spurious mode generation in the proposed Ka-Band gyroklystron transmitter tube, overmoded transmission line, and feed are discussed. A brief description of the overall problem is presented. The theory used to evaluate feed and antenna performance when spurious modes are present is given. Results for feed patterns and overall antenna patterns for various levels and types of spurious modes are presented. Worst case antenna efficiency is calculated as a function of spurious mode level. Conclusions are drawn regarding the results of this study and their application to specifications on the transmitter tube and transmission line system.
- Publication:
-
In its The Telecommun. and Data Acquisition Rept. p 12-23 (SEE N85-19224 10-32
- Pub Date:
- February 1985
- Bibcode:
- 1985tdar.nasa...12H
- Keywords:
-
- Antenna Design;
- Antenna Feeds;
- Antenna Radiation Patterns;
- Extremely High Frequencies;
- Klystrons;
- Microwave Antennas;
- Computer Programs;
- Insertion Loss;
- Microwave Transmission;
- Propagation Modes;
- Specifications;
- Electronics and Electrical Engineering