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Active Antenna for the VLF to HF ObserverA simple and low cost method of fabricating an active antenna preamplifier system covering the range of 10 KHz to 10 MHz for use with tunable communications receivers is described. The same type of system can be used with airborne VLF navigation receivers. By operating a high impedance preamplifier as a wide band device directly at the base of a short vertical antenna, the signal can be driven back to the receiver on a length of coaxial cable. The antenna can be as short as I meter and still give excellent results when the capacity to ground at the antenna is low.
Document ID
19790011925
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Burhans, R. W. (Ohio Univ. Athens, OH, United States)
Date Acquired
September 3, 2013
Publication Date
February 1, 1979
Subject Category
Aircraft Communications And Navigation
Report/Patent Number
NASA-CR-158384
TM-65
Accession Number
79N20096
Funding Number(s)
CONTRACT_GRANT: NGR-36-009-017
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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