Broadband beam antennas for EHF, circularly-polarized and fan-shaped.
Abstract
This paper describes the design and measured performance characteristics of a circularly-polarized fan-shaped beam antenna. It consists of a parabolic cylinder reflector, tilt-fed by a subsystem comprising a small conical horn and a circular waveguide transmission line containing a quarter-wave plate. Virtually exact-scale-model composite antennas were tested in detail over the 15.5- to 28-GHz and 24.9- to 41.7-GHz frequency bands. It is shown that in the lower 1.65:1 portions of these 1.8:1 bands all performance characteristics are quite favorable and that, thereafter, certain important performance characteristics rapidly deteriorate.
- Publication:
-
Microwave Journal
- Pub Date:
- August 1975
- Bibcode:
- 1975MiJo...18...45E
- Keywords:
-
- Antenna Radiation Patterns;
- Broadband;
- Circular Polarization;
- Extremely High Frequencies;
- Microwave Antennas;
- Antenna Design;
- Frequency Response;
- Horn Antennas;
- Millimeter Waves;
- Parabolic Reflectors;
- Performance Tests;
- Power Gain;
- Waveguides;
- Communications and Radar