Penzias read the paper and called Dicke again and invited him to Bell Labs to look at the horn antenna and listen to the background noise.
22.
Arno Penzias and Robert Wilson of Bell Labs used the Holmdel Horn Antenna located on Crawford Hill to take measurements of the cosmic microwave background radiation.
23.
An advantage of horn antennas is that since they have no resonant elements, they can operate over a wide range of dBi, with 10-20 dBi being typical.
24.
Designs such as the horn antenna and parabolic dish antenna become more practical at higher frequencies ( shorter wavelengths ) whereas antenna arrays may be practical at any wavelength.
25.
In parabolic antennas such as satellite dishes, a "'feed horn "'( or "'feedhorn "') is a small horn antenna used to convey radio waves between the transmitter and / or frequencies.
26.
His system already used the classic antenna setup of horn antenna with parabolic reflector and was presented to German military officials in practical tests in Cologne and Rotterdam harbour but was rejected.
27.
Telecommunications were via dual S-band 10 W / 20 W transmitters and a single receiver through the high gain parabolic antenna, the medium gain horn antenna, or the low gain omnidirectional antenna.
28.
Provided with a low power klystron as a microwave source, Lovell and Hodgkin began experimenting with horn antennas that would offer significantly higher angular accuracy than the Yagi antennas used on the Mk.
29.
Working at night with borrowed equipment, help from a university carpenter and an investment of $ 400, Purcell and Ewen built a horn antenna atop Harvard's Lyman Laboratory, and the elusive radiation was detected.
30.
The high-gain antenna is flat to prevent heat from building up in it . " Akatsuki " also has a pair of medium-gain horn antennas mounted on turntables and two low-gain antennas for command uplink.
