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A note on the use of superconducting coils with small‐height HF vehicular antennas
Author(s) -
Knop C. M.
Publication year - 1999
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/(sici)1098-2760(19991005)23:1<30::aid-mop9>3.0.co;2-j
Subject(s) - electromagnetic coil , microwave , electrical engineering , antenna (radio) , physics , engineering , materials science , telecommunications
The benefit achieved by substituting a superconducting coil for the existing ordinary coil in the antenna coupler employed with small‐height HF vehicular antennas (whips, inverted Ls, and condenser types) is determined herein by using the previously measured base currents of these antennas in conjunction with the measured Q of their existing coupler coil and the known equivalent circuit. It is shown that this benefit is not significant, being, at most, several decibels, and this only at the low end of the 1.8–30 MHz HF band. This is due to the fact that the vehicle/ground‐path resistance is so significant. ©1999 John Wiley & Sons, Inc. Microwave Opt Technol Lett 23: 30–36, 1999.