THE HELICAL ANTENNA AND ITS PROBLEMS.

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Abstract:

Problems are discussed which result from the use of helical antennas in a dissipative medium at low frequencies. A network model for helical antennas surrounded by rock with the conductivity sigma and the dielectrical constant epsilon, is used for deriving theoretical expressions for the real part and imaginary part of the input impedance in the case of quasistationary currents. The field structure to be expected and the different types of propagation are discussed in brief. The antennas examined by experiment are described and the measured results are compared with the theoretical values. Author

Author(s):
Bitterlich, Wolfram
Author Organization(s):
INNSBRUCK UNIV (AUSTRIA)
Descriptive Note:
Scientific rept. no. 1, 1 Jul 65-1 Jan 67,
Pagination:
0040

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AFCRL-67-0358
Contract/Grant Number(s):
AF 61(052)-902
Task Number(s):
460011
Project Number(s):
AF-4600
Monitor Series:
67-0358
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
(*HELICAL ANTENNAS, LOW FREQUENCY), UNDERGROUND ANTENNAS, VERY LOW FREQUENCY, ELECTRICAL IMPEDANCE, PERFORMANCE(ENGINEERING), MATHEMATICAL MODELS, PROPAGATION, ROCK, ELECTROMAGNETIC FIELDS
Field(s)/Group(s):
Electrical and Electronic Equipment
Report Date:
1967 Mar 01