Antenna apparatus having a simplified structure
First Claim
1. An antenna apparatus comprising a plurality of antennas for receiving, as reception signals, radio waves different from one another in frequency and connected to a receiver body, said antenna apparatus further comprising:
- a single case or a single substrate to which said antennas are mounted; and
a single cable for transmitting to said receiver body a combined reception signal obtained by combining said reception signals received by said antennas.
1 Assignment
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Accused Products
Abstract
In an antenna apparatus, a first antenna and a second antenna for receiving radio waves different from each other are mounted to a single case or a single substrate. The first and the second antennas are connected through a common cable to a receiver body. The first antenna is a helical antenna and comprises an insulating cylindrical bobbin, a plurality of wires helically wound around the insulating cylindrical bobbin, and a ring-shaped insulating wire holder for fixing the wires to the insulating cylindrical bobbin. The second antenna is a monopole antenna and can be arranged inside the insulating cylindrical bobbin. The insulating cylindrical bobbin comprises a hollow center member having a center axis coincident with a center axis thereof so that the center axis of the monopole antenna is coincident with that of the helical antenna, and a rib supporting the hollow cylindrical member. The antenna apparatus has a top cover covering the antennas and provided with a protrusion for inhibiting the rotation of the ring-shaped insulating wire holder.
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Citations
21 Claims
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1. An antenna apparatus comprising a plurality of antennas for receiving, as reception signals, radio waves different from one another in frequency and connected to a receiver body, said antenna apparatus further comprising:
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a single case or a single substrate to which said antennas are mounted; and
a single cable for transmitting to said receiver body a combined reception signal obtained by combining said reception signals received by said antennas. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of producing an antenna apparatus comprising a helical antenna, said method comprising the steps of:
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arranging a plurality of wires on an outer peripheral surface of an insulating cylindrical member in its lengthwise direction;
fitting a ring-shaped insulating wire holder to said insulating cylindrical member so as to hold said wire; and
rotating said ring-shaped insulating wire holder in a circumferential direction of said insulating cylindrical member by a predetermined angle.
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21. A method of producing an antenna apparatus comprising an antenna, said method comprising the steps of:
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inserting a boss pin formed at a lower end of said antenna into a hole formed in a substrate; and
heating said boss pin to fuse said boss pin to said substrate.
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Specification