Antenna apparatus

Claim 2

An antenna apparatus for processing received FM stereophonic radio signals comprising primary and secondary radio signals and and for coupling said processed signals to a radio receiver having means for reproducing stereophonic sound from applied processed signals having amplitudes at or above a predetermined level, level, said antenna apparatus comprising: means including first, second and third coils for intercepting said radio signals, each of said coils comprising a pair of parallel electrical conductors interconnected at one end; means for holding said first coil and said second coil aligned in parallel spaced-apart planes and said third coil disposed adjacent the edges of said first coil and said second coil in a plane substantially normal to the planes of said first coil and said second coil; and voltage divider means coupled to the other ends of each of said pairs of conductors so as to be coupled in parallel with each of said first, second, and third coils, said coils and said voltage divider means combining to convert said radio signals to electrical signals comprising corresponding primary and secondary components having respective amplitudes corresponding to the relative signal strengths of said primary and secondary radio signals, said voltage divider means being adjustable to selectively reduce the amplitude of said electrical signals until said secondary components are below the predetermined threshold level of said radio receiver and said primary component exceeds said predetermined threshold level.

Claim 3

Apparatus in accordance with claim 1 wherein said voltage divider means comprises a fixed impedance element coupled across the ends of said coils and a movable contact for deriving a proportional representation of the electrical signals developed across said fixed impedance element responsive to said coils intercepting said radio signals and wherein said radio receiver is coupled to one end of said fixed impedance element and said movable contact.

Claim 4

Apparatus in accordance with claim 2 wherein said voltage divider means comprises a potentiometer.

Claim 5

Apparatus in accordance with claim 1 wherein said holding means includes means for holding said first and second coils so that the opposing surfaces of said first and second coils are at least one inch apart.

Claim 6

Apparatus in accordance with claim 1 wherein each of said coils comprise a length of twin lead antenna wire about six feet long.

Claim 7

An antenna apparatus for processing received FM stereophonic radio signals comprising primary and secondary radio signals for coupling said processed signals to a radio receiver having means for reproducing stereophonic sound from applied processed signals having amplitudes at or above a predetermined threshold lever, said antenna apparatus comprising: means including first, second, third and fourth coils for intercepting said radio signals, each of said coils comprising a pair of parallel electrical conductors interconnected at one end, means for holding said first and third coils in a common plane and said second and fourth coils disposed in respective planes normal to the plane of said first and third coils, said second coil being adjacent to said first coil and said fourth coil being adjacent said third coil on the opposite side of said third coil with respect to said second coil; voltage divider means coupled to the other ends of each of said pairs of conductors of said first and second coils so as to be coupled in parallel with each of said first and second coils; and switch means for selectively coupling each of said third and fourth coils in parallel with said first and second coils and said voltage divider means; said coils and said voltage divider means combining to convert said radio signals to electrical signals comprising corresponding primary and secondary components having respective amplitudes corresponding to the relative signal strengths of said primary and secondary radio signals, said voltage divider means being adjustable to selectively reduce the amplitude of said electrical signals until said secondary components are below the predetermined threshold level of said radio receiver and said primary component exceeds said predetermined threshold level.

Claim 8

An antenna apparatus for processing received FM stereophonic radio signals comprising primary and secondary radio signals for coupling said processed signals to a radio receiver having means for reproducing stereophonic sound from applied processed signals having amplitudes at or above a predetermined threshold lever, said antenna apparatus comprising: means including first, second, third and fourth coils for intercepting said radio signals, each of said coils comprising a pair of parallel electrical conductors interconnected at one end, means for holding said first and third coils in a common plane and said second and fourth coils disposed in respective planes normal to the plane of said first and third coils, said second coil being adjacent to said first coil and said fourth coil being adjacent said third coil on the opposite side of said third coil with respect to said second coil; voltage divider means coupled to the other ends of each of said pairs of conductors of said first and second coils so as to be coupled in parallel with each of said first and second coils; and switch means for selectively coupling each of said third and fourth coils in parallel with said first and second coils and said voltage divider means; said coils and said voltage divider means combining to convert said radio signals to electrical signals comprising corresponding primary and secondary components having respective amplitudes corresponding to the relative signal strengths of said primary and secondary radio signals, said voltage divider means being adjustable to selectively reduce the amplitude of said electrical signals until said secondary components are below the predetermined threshold level of said radio receiver and said primary component exceeds said predetermined threshold level.

Claim 9

Apparatus in accordance with claim 6 wherein said voltage divider means comprises a fixed impedance element coupled across the ends of said coils and a movable contact for deriving a proportional representation of the electrical signals developed across said fixed impedance element responsive to said coils intercepting said radio signals and wherein said radio receiver is coupled to one end of said fixed impedance element and said movable contact.

Claim 10

Apparatus in accordance with claim 7 wherein said voltage divider means comprises a potentiometer.

Claim 11

Apparatus in accordance with claim 6 wherein said switch means comprises a double-pole, double-throw switch.

Claim 12

Apparatus in accordance with claim 6 wherein each of said coils comprise a length of twin lead antenna wire about four feet long.