Affel and Lloyd Espenschied invented coaxial cable at AT&T
Bell Telephone Laboratories in 1929. The coaxial cable opened
a wide spectrum of frequencies for long distance telephone service,
making it possible to carry thousands of simultaneous phone calls
on long distance circuits.
was born in Brooklyn, New York and studied electrical engineering
at the Massachusetts Institute of Technology. As a consultant
to Bell Labs, Affel worked with Espenschied devising efficient
means to carry high frequencies needed for broadband communications
systems. Affel and Espenschied created a transmission system using
a coaxial conductor, consisting of two concentric cylinders of
conducting material separated by air. This structure reduced frequency
losses and prevented outside interference.
coaxial cable created a higher capacity for local and long distance
circuits. During his career at Bell Labs, Affel worked with other
engineers to combine coaxial cable with microwave relays, making
high-volume transcontinental telephone and television transmission
signals possible. He earned several other patents for electronic
devices, including advanced transmitters and innovative antennas.
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