US 4,380,011 AGranted

Loop antenna arrangement for inclusion in a television receiver

AssigneeRCA Corporation

InventorsRafael Torres, Oakley M. Woodward

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Abstract

A VHF television receiving antenna arrangement includes a cabinet having a loop of electrically conductive material disposed on its top, back and sides, preferrably on the inside surfaces thereof. A gap in the loop defines first and second feed terminals to which circuitry for tuning the loop connects. The loop is tuned thereby over at least a portion of the television frequency bands, responsive to a control voltage. Signals from the tuning circuitry are coupled to a television receiver tuner by a transmission line. Such loops can also have capacitors connected across tuning gaps for making the directional response of the loop more uniform at relatively lower frequencies (e.g. VHF channels 2-6) or switching diodes connected across control gaps for changing the directional response of the loop at relatively higher frequencies (e.g. VHF channels 7-13).

Claims27

Dependent claims

An antenna arrangement for inclusion within a television receiver having a tuner, and responsive to signals in selected frequency bands comprising:

a cabinet for said television receiver having at least two opposing substantially vertical side surfaces and a substantially vertical back surface therebetween, and having a top surface substantially horizontally disposed between said side side surfaces;
a substantially horizontal loop formed of a band of electrically conductive material having a gap defining first and second feed terminals, which loop includes
a first portion of said band of electrically conductive material affixed along said top surface between said side surfaces,
a second portion of said band of electrically conductive material substantially horizontally affixed along said back surface between said side surfaces,
a third band portion of said of electrically conductive material affixed along one of said side surfaces for connecting one end of said first portion of said band to one end of said second portion of said band,
a fourth portion of said band of electrically conductive material affixed along the other of said side surfaces for connecting an other end of said first portion of said band to an other end of said second portion of said band, and
said second, third and fourth portions of said band each having a respective width dimension greater than that of said first portion of said band,
whereby the width dimension of said first portion of said band lies in a substantially horizontal plane and the width dimensions of said second, third and fourth portions of said band lie in substantially vertical planes;
tuning circuitry coupled to said first and second feed terminals for tuning said loop over at least a portion of said frequency bands responsive to a control potential, said tuning circuitry being affixed to said cabinet proximate said first and second feed terminals;
and
a transmission line for coupling said tuning circuitry to the tuner of said television receiver.

8 more elements

An antenna arrangement for inclusion in a television receiver having a tuner, and responsive to signals in selected frequency bands comprising:

a substantially horizontal loop antenna formed of a band of electrically conductive material having a plurality of gaps therein, a first of said gaps defining first and second feed terminals;
coupling means for coupling each of said first and second feed terminals to the tuner of said television receiver;
switch means connected across at least a second of said gaps and located proximate thereto for selectively making a conductive connection thereacross to produce different directional reception patterns in response to a control signal, wherein said selectively conductive connection provides a low positive resistance connection;
and
control means including an electrically conductive path provided by said loop antenna for applying said control signal through said feed terminals and said loop antenna to said switch means to produce said different directional reception patterns.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/210,249Filed 25 Nov 1980
Granted: 12 Apr 1983
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

H01Q 1/24
By structural association with other equipment or articles: with receiving set
H01Q 3/247
Varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching: by switching different parts of…
H01Q 7/00
Loop antennas with a substantially uniform current distribution around the loop and
H01Q 9/26
With feed intermediate between the extremities of the antenna, e.g. centre-fed dipole: with folded element or elements, the folded parts being…