Radio interference bucker apparatus
OwnerJerry M. Mendelsoninventor
Life of this patent
Estimating the term…
Abstract
An apparatus for intercepting radio waves emitted from a relatively local interference radio-wave-emitting source and processing the same so that they may be fed into the antenna terminal of a radio wave receiver for accomplishing substantially interference-free reception of distant radio wave stations. An antenna suited for only local reception provides the interfering radio wave energy to the bucker apparatus. Therein it is amplified a selected amount and the phase thereof altered by a continuously adjustable delay means to accomplish the desired cancellation of interference by phase opposition of the interfering signal from the bucker with respect to the interfering signal as it is received at the antenna terminal of the radio wave receiver.
Claims9
In combination with a radio-wave receiver having a connected antenna (2) that intercepts a desired radio-wave and also a local interference radio wave, radio interference bucker apparatus comprising;
- (a) a separate antenna (1) disposed significantly closer to the earth relative to said connected antenna to intercept substantially only the local interference radio-wave causing said interference,
- (b) only broad-band tuning means responsive to said local interference radio-wave connected to said separate antenna,
- (c) only amplifying means (4,5) directly responsive to said local interference radio-wave at the incoming frequency of that radio-wave, connected to said tuning means,
- (d) a separate-coil continuously adjustable delay means (7) having outer and inner coils responsive to said interference radio-wave connected to said amplifying means to alter the phase of said interference radio-wave, upon said inner coil being moved,
- (e) a shield (40) surrounding said outer coil, and
- (f) circuit means (8,9) connected to said adjustable delay means and to said connected antenna to impress upon said radio-wave receiver an interference radio-wave of opposite phase to that intercepted by said connected antenna.
Dependencies are inferred from the claim text.