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Probably invented in WW2, so concealed from view till war was over. Tyrell of Bell labs published a paper in 1947 in IEEE journal on it. Also called Magic Tee.
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For the curious, the problem is that you have a radar waveguide through which you transmit say 1kW pulses off your dish antenna. The signal travels out, is reflected from the target, and returns to our microwave dish and is fed to the receiver.
But you don't want the 1kW output pulse to appear on the input of the sensitive receiver, for that will burn it out; or at least have deleterious effect.
The magic tee is an assembly of 1/4 wave and 1/2 wave pieces of waveguide such that while the transmitter is operating, the receiver has a short across the input. But due to the magic of wavelength reflectors, when the wave reflected from the target reaches the magic tee, is sees an open path to the receiver input. Commonly called magic tee, for you can look straight through the wave guide. Also called Transmit Receive (TR) switch
What else can I help you with?
Who invented the switch?
the earliest safe dimmer switch - used in the theater - was invented by Granville Woods in the 1890's.
When was the first light switch invented?
the earliest safe dimmer switch - used in the theater - was invented by Granville Woods in the 1890's.
Who invented the light switch and light socket?
Thomas E. Murray
Who invented the trackball?
AnswerAccording to the web site www.trackballworld.com the trackball was invented in 1949 by two Canadian engineers working on a new radar system. Full reference citation: http://www.trackballworld.com/trackball-history.htmlTom Cranston and Fred Longstaff invented the trackball.
What year did CRT monitor invented?
It was derived in the 1950s, from RADAR screens and TV sets developed in the 1930s, which were derived from oscilloscopes developed in the 1920s.
When and who invented RADAR?
1935
Who made the radar?
As far as I know, radar was invented by a Hungarian scientist named Zoltan Bay. That radar was first used in World War II by the British troops.
What year was the radar invented?
Radar was invented in 1935 by Scottish physicist Sir Robert Watson-Watt. He developed the first practical radar system for detecting aircraft.
What helped the british detect German planes?
The newly invented radar.
When was the ship radar invented?
Radar was first put on ships during WW2.
Where was the Doppler Radar invented?
At the University of Oklahoma
Who invented Doppler radar?
Christian Doppler
When was the radar gun invented?
March 1954
Was the radar invented by Robert Watson?
yes it was
When was the radar screen invented?
September 5, 1997.
When did robert Watson-watt build radar?
Robert Watson-watt invented the radar on 15th june 1935.
Who discover radar?
robert watson watts Radar wasn't discovered, it was invented.
