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US 5,030,963 AGranted
Signal receiver
AssigneeSony Corporation
InventorMotomu Tadama
Life of this patent
Estimating the term…
Abstract
A signal receiver with a cabinet and mono-pole antenna mounted outside of the cabinet with a signal receiving apparatus mounted inside of the cabinet. A shielded conductor is mounted inside of the cabinet as another antenna to be used with the mono-pole antenna. A balun which has first and second input terminals and an output terminal, and the first and second input terminals of the balun are connected to the mono-pole antenna and to the shield conductor and the output terminal is connected to the signal receiving apparatus.
Claims4
A signal receiver comprising:
- (a) a cabinet;
- (b) a mono-pole antenna mounted outside of said cabinet;
- (c) a signal receiving apparatus which includes a tuner mounted inside of said cabinet;
- said signal receiving apparatus having a high frequency circuit portion which radiates outwardly an undesired high frequency signal;
- (d) an earth pattern mounted inside of said cabinet and electrically connected to said signal receiving apparatus,
- (e) a planar shielding conductor mounted inside of said cabinet which surrounds said high frequency circuit portion;
- (f) a balun which has first and second input terminals and a pair of output terminals;
- (g) first circuit means which connects said mono-pole antenna to said first input terminal of said balun
- (h) second circuit means which connects one of said pair of output terminals of said balun to said signal receiving apparatus;
- (i) third circuit means which connects the other of said pair of output terminals of said balun to said earth pattern, and
- (j) fourth circuit means which connects said shielding conductor to said second input terminal of said balun such that said shielding conductor operates as an antenna element with said mono-pole antenna element.
8 more elements
A signal receiver comprising:
- (a) a cabinet;
- (b) A mono-pole antenna mounted outside of said cabinet;
- (c) a signal receiving apparatus which includes a tuner mounted inside of said cabinet;
- said signal receiving apparatus having a high frequency circuit portion which radiates outwardly an undesired high frequency signal;
- (d) an earth pattern mounted inside of said cabinet and electrically connected to said signal receiving apparatus,
- (e) a planar shielding conductor mounted inside of said cabinet which extends around said high frequency circuit portion of three sides;
- (f) a balun which has first and second input terminals and a pair of output terminals;
- (g) first circuit means which connects said mono-pole antenna to said first input terminal of said balun
- (h) second circuit means which connects one of said pair of output terminals of said balun to said signal receiving apparatus;
- (i) third circuit means which connects the other of said pair of output terminals of said balun to said earth pattern, and
- (j) fourth circuit means which connected said shielding conductor to said second input terminal of said balun such that said shielding conductor operates as an antenna element with said mono-pole antenna element.
8 more elements
Dependencies are inferred from the claim text.