Title :
On the leakage radiation from a circumferentially-slotted cylinder and its application to the EMI produced by TEM-coaxial rotary joints
Author :
Knop, Charles M. ; Libelo, Louis F.
Author_Institution :
Andrew Corp., Orland Park, IL, USA
fDate :
11/1/1995 12:00:00 AM
Abstract :
The amount of leakage radiation, as well as the radiation pattern and its gain, produced by a complete 360° circumferential-narrow gap cut in a coaxial cable carrying a TEM mode is determined. Leakage levels for such a typical cable of approximately 26% are predicted to occur for gaps as small as about 0.0074λ. The former is substantiated by measurement on a ⅞" diameter coaxial cable of 50 Ω characteristic impedance operating at 2 GHz. Estimates of the EMI levels produced by typical coaxial choked-rotary joints (where the chokes significantly decrease the gap leakage) operating at high power levels are then given
Keywords :
UHF measurement; cable jointing; coaxial cables; electric impedance; electromagnetic interference; inductors; transmission line theory; 0.4375 in; 2 GHz; 50 ohm; EMI; TEM mode; TEM-coaxial rotary joints; characteristic impedance; chokes; circumferentially-slotted cylinder; coaxial cable; coaxial choked-rotary joints; gain; gap leakage; high power levels; leakage levels; leakage radiation; measurement; radiation pattern; Admittance; Coaxial cables; Coaxial components; Coupling circuits; Electromagnetic interference; Equivalent circuits; Frequency; Impedance measurement; Inductors; Waveguide discontinuities;
Journal_Title :
Electromagnetic Compatibility, IEEE Transactions on
