Twin coil antenna
First Claim
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1. An antenna for a radio receiver comprising a ferrite rod;
- spaced coils wound about the ferrite rod;
a variable capacitor element connecting each coil together; and
a combiner connecting each coil together, the combiner additively combining out-of-phase signals induced in the coils by received radio signals so as to provide an output signal corresponding to the sum of the out-of-phase signals in the coils.
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Abstract
A ferrite core antenna having two spaced signal pick-up coils coupled through a transformer so that the signals from the two coils are additively combined in the primary of the transformer. A variable capacitor connected to the two coils tunes the antenna to selected frequencies. This results in amplification of the signal.
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Citations
13 Claims
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1. An antenna for a radio receiver comprising a ferrite rod;
- spaced coils wound about the ferrite rod;
a variable capacitor element connecting each coil together; and
a combiner connecting each coil together, the combiner additively combining out-of-phase signals induced in the coils by received radio signals so as to provide an output signal corresponding to the sum of the out-of-phase signals in the coils. - View Dependent Claims (2, 3, 4, 5, 6)
- spaced coils wound about the ferrite rod;
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7. An antenna for a radio receiver comprising a ferrite rod;
- spaced pick-up coils wound about the ferrite rod, signals being induced in the pick-up coils by received magnetic fields in the ferrite rod, the signals being of opposite phase; and
a combiner connected to the coils for additively combining the opposite phase signals induced in the coils to provide an output signal corresponding to the sum of said opposite phase signals. - View Dependent Claims (8, 9, 10, 11, 12, 13)
- spaced pick-up coils wound about the ferrite rod, signals being induced in the pick-up coils by received magnetic fields in the ferrite rod, the signals being of opposite phase; and
Specification