Antenna system
First Claim
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1. A multiple frequency band antenna system comprising:
- at least one dipole antenna for a first frequency band including a pair of rod elements arranged substantially in a line; and
at least one Yagi antenna for receiving radio waves in a second frequency band higher than said first frequency band coming from a direction along the length of said rod elements, said Yagi antenna having a constituent element attached to and transverse to at least one of said rod elements.
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Abstract
An antenna system includes a VHF dipole antenna having a pair of rod elements disposed substantially in a line, and a UHF Yagi antenna having a radiator and a director disposed on the rod elements.
84 Citations
31 Claims
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1. A multiple frequency band antenna system comprising:
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at least one dipole antenna for a first frequency band including a pair of rod elements arranged substantially in a line; and
at least one Yagi antenna for receiving radio waves in a second frequency band higher than said first frequency band coming from a direction along the length of said rod elements, said Yagi antenna having a constituent element attached to and transverse to at least one of said rod elements.
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2. An antenna system comprising:
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a plurality of first antennas for a first frequency band arranged to receive radio waves in said first frequency band coming from different directions;
a plurality of second antennas for a second frequency band associated with respective ones of said first antennas, said second antennas being arranged to receive radio waves in said second frequency band coming from different directions;
a plurality of first filters associated with respective ones of said first antennas and receptive of outputs of the respective associated ones of said first antennas, said first filters allowing signals in said first frequency band to pass therethrough;
a plurality of second filters associated with respective ones of said second antennas and receptive of outputs of the respective associated ones of said second antennas, said second filters allowing signals in said second frequency band to pass therethrough;
selecting means equal in numbers to said first and second antennas, each of said selecting means receiving an output of one of said first filters and an output of one of said second filters; and
control means for selectively energizing individual ones of said selecting means, and pairs of selecting means to which the outputs of adjacent ones of said first antennas are coupled. - View Dependent Claims (3)
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4. An antenna system comprising:
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an even number equal to or greater than four of rod antennas arranged along respective ones of a plurality of mutually intersecting straight lines lying substantially in a same plane; and
a pair of feed terminals led out of each of said rod antennas;
wherein the number of said feed terminal pairs is equal to the number of said rod antennas, a pair of adjacent rod antennas forming an antenna having the pair of feed terminals led out of respective ones of said pair of adjacent rod antennas, each of said rod antennas having a length of from about 800 mm to about 850 mm.
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5. An antenna system comprising:
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a flat body;
a plurality of Yagi antennas disposed at different levels in said body and arranged to receive radio waves in a first frequency band coming from various directions; and
a plurality of rod antennas respectively disposed at levels between adjacent ones of the levels of said Yagi antennas within said body, for receiving radio waves in a second frequency band coming from various directions. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification