Dipole television antenna
AssigneeNTL Technologies Inc.
InventorGeorge Skahill
Life of this patent
Estimating the term…
Abstract
A television antenna device comprises a pair of electrically conductive dipole arms, a support attached to the dipole arms for supporting the dipole arms, and an electrical circuit operatively connected to each of the dipole arms and mounted to the support for tuning the dipole arms for an optimal impedance match over a plurality of different frequency ranges. A switch is operatively connected to the electrical circuit and is mounted to the support for enabling adjustment of a circuit configuration including the electrical circuit and the dipole arms to selectively tune the dipole arms for an optimal impedance match over the plurality of different frequency ranges. Each of the dipole arms includes a pair of coaxial series tuned circuits for suppressing current flow over electromagnetic frequencies corresponding to higher VHF channels.
Claims25
A television antenna device comprising:
- a pair of electrically conductive dipole arms;
- support means attached to said dipole arms for supporting said dipole arms;
- electrical circuit means operatively connected to each of said dipole arms and mounted to said support means for tuning said dipole arms for an optimal impedance match over a plurality of different frequency ranges;
- switch means operatively connected to said circuit means and mounted to said support means for enabling adjustment of a circuit configuration including said circuit means and said dipole arms to selectively tune said dipole arms for an optimal impedance match over said plurality of different frequency ranges;
- and
- coupling means for coupling said dipole arms to a television receiver via said circuit means, said circuit means including a plurality of paired first and second inductors, the first inductor and the second inductor of each pair of inductors having a common inductance, the inductors of each pair differing in inductance from the inductors of other pairs, said switch means including means for selectively connecting said dipole arms to said coupling means via alternate pairs of said first and second inductors so that the first inductor of a pair is operatively connected in one circuit configuration to one of said dipole arms and the associated second inductor is operatively connected in another circuit configuration to the other of said dipole arms.
A television antenna device comprising:
- a pair of electrically conductive dipole arms each including at least one coaxial series tuned circuit for suppressing current flow over electromagnetic frequencies corresponding to higher VHF channels;
- support means attached to said dipole arms for supporting said dipole arms;
- and
- coupling means connectable to a television receiver, said coupling means including electrical circuit means operatively connected to each of said dipole arms and mounted to said support means for tuning said dipole arms for an optimal impedance match over a plurality of different frequency ranges, said coupling means further including switch means operatively connected to said circuit means and mounted to said support means for adjusting a circuit configuration including said circuit means and said dipole arms to selectively tune said dipole arms for an optimal impedance match over said plurality of different frequency ranges;
- said circuit means including a plurality of paired first and second inductors, the first inductor and the second inductor of each pair of inductors having a common inductance, the inductors of each pair differing in inductance from the inductors of other pairs, all of said first inductors being connected at one end to one another and all of said second inductors being connected at one end to one another, said switch means including means for selectively connecting said dipole arms to said coupling means via alternate pairs of said first and second inductors so that the first inductor of a pair is operatively connected in one circuit configuration to one of said dipole arms and the associated second inductor is operatively connected in another circuit configuration to the other of said dipole arms.
A television antenna device comprising:
- a pair of electrically conductive dipole arms;
- coupling means connectable to a television receiver;
- a plurality of paired first and second inductors, the first and second inductor of each pair of inductors having a common inductance, the inductors of each pair differing in inductance from the inductors of other pairs, all of said first inductors being connected at one end to one another and all of said second inductors being connected at one end to one another;
- a housing containing said inductors, said dipole arms being mounted to said housing;
- and
- switch means mounted to said housing for alternately connecting one of said dipole arms to said coupling means via different ones of said first inductors and concomitantly connecting the other of said dipole arms to said coupling means via associated ones of said second inductors, thereby tuning said dipole arms for an optimal impedance match over a plurality of different frequency ranges.
Dependencies are inferred from the claim text.