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Passive repeater
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A passive repeater or passive radio link deflection, is a reflective or sometimes refractive panel or other object that assists in closing a radio or microwave link, in places where an obstacle in the
A typical passive microwave repeater link site, this one located near Salt Lake City, Utah, USA was removed in 2013
A typical passive microwave repeater link site, this one located near Salt Lake City, Utah, USA was removed in 2013
Closer view of one of the Passive Microwave repeaters on Black Hill, Hong Kong
Closer view of one of the Passive Microwave repeaters on Black Hill, Hong Kong
Passive Microwave repeater on a hill in Nagano, Japan
Passive Microwave repeater on a hill in Nagano, Japan
Parabolic antenna
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A parabolic antenna is an antenna that uses a parabolic reflector, a curved surface with the cross-sectional shape of a parabola, to direct the radio waves. The most common form is shaped like a dish
Passive repeater
…and microwave radio-relay stations. Passive radio relay link deflection systems in the vertical level can be realized by receiving the signal with a parabolic antenna and leading it through a waveguide to a second parabolic antenna, where it is radiated. For passive microwave radio relay link deflections in the…
A 28.5 meter parabolic satellite communications antenna at Erdfunkstelle Raisting (Raisting Earth Station), Bavaria, Germany, the biggest facility for
A 28.5 meter parabolic satellite communications antenna at Erdfunkstelle Raisting (Raisting Earth Station), Bavaria, Germany, the biggest facility for satellite communication in the world. It has a Cassegrain-type feed, transmits at 6 Ghz and receives at 4 Ghz with a gain of 64.2 dB
Wire grid-type parabolic antenna used for MMDS data link at a frequency of 2.5-2.7 GHz. It is fed by a vertical dipole under the small aluminum reflec
Wire grid-type parabolic antenna used for MMDS data link at a frequency of 2.5-2.7 GHz. It is fed by a vertical dipole under the small aluminum reflector on the boom. It radiates vertically polarized microwaves.
Shrouded microwave relay dishes on a communications tower in Australia
Shrouded microwave relay dishes on a communications tower in Australia
Cassegrain antenna on the Voyager spacecraft, 1977.
Cassegrain antenna on the Voyager spacecraft, 1977.