Reflecting Systems
| Autor: | J.F. Ramsay, L.K. De Size |
|---|---|
| Rok vydání: | 1964 |
| Předmět: |
Physics
Parabolic antenna business.industry Astrophysics::Instrumentation and Methods for Astrophysics Physics::Optics Reflector (antenna) Astrophysics::Cosmology and Extragalactic Astrophysics Parabolic cylinder function Microwave transmission Curvature law.invention Optics law Radar business Microwave Radio astronomy |
| Popis: | Publisher Summary The historical development of the microwave reflector antenna can be divided into three phases. In Phase I, the “Hertzian Period,” Hertz adapted the parabolic cylinder in 1888 as a beam-forming reflector for his classic researches in microwave optics. Phase II of the microwave reflector can be called the “Dark Age” of microwaves, for little microwave development took place despite the great promise of the Hertzian epoch. This vacuum existed until about 1930. In 1931, a microwave telephone link was established across the English Channel by Clavier and his associates using paraboloidal antennas. This event can be said to have launched Phase III of the microwave reflector, the “Modern Period.” The reflectors used in microwave antenna systems have two characteristic geometrical features: the surface curvature, and the boundary profile. Microwave reflectors might be polarized, unpolarized, or polarizing, where in the latter case the reflector is a wave-polarization transformer. This chapter presents the history of the microwave reflector antenna in radar, microwave communications, radio astronomy, satellite tracking, and deep-space probing. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|