High performance retractable half-wave antenna
First Claim
1. An antenna comprising:
- a first helical radiator; and
a second helical radiator positioned substantially co-linear with the first helical radiator, the second helical radiator being moveable between a first position wherein the second helical radiator is substantially adjacent to the first helical radiator, and a second position wherein the second helical radiator is distal from the first helical radiator;
wherein the first helical radiator and the second helical radiator cooperate to transmit or receive electromagnetic signals using at least one link selected from the group consisting of an electrical connection and electromagnetic coupling.
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Accused Products
Abstract
An antenna (100) that includes a first helical radiator (102) and a second helical radiator (116) positioned substantially co-linear with the first helical radiator. The first helical radiator can be communicatively linked to a signal source (106). The second helical radiator can be moveable between a first position wherein the second helical radiator is substantially adjacent to the first helical radiator and a second position wherein the second helical radiator is distal from the first helical radiator. The first helical radiator and the second helical radiator can cooperate to transmit and/or receive electromagnetic signals using an electrical connection and/or electromagnetic coupling. The electromagnetic coupling can primarily include capacitive coupling. The antenna also can include an impedance tuning member (538) which electromagnetically couples to the first helical radiator and/or the second helical radiator.
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Citations
20 Claims
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1. An antenna comprising:
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a first helical radiator; and
a second helical radiator positioned substantially co-linear with the first helical radiator, the second helical radiator being moveable between a first position wherein the second helical radiator is substantially adjacent to the first helical radiator, and a second position wherein the second helical radiator is distal from the first helical radiator;
wherein the first helical radiator and the second helical radiator cooperate to transmit or receive electromagnetic signals using at least one link selected from the group consisting of an electrical connection and electromagnetic coupling. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An antenna comprising:
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a first helical radiator;
a second helical radiator; and
a coupler that capacitively couples the first helical radiator to the second helical radiator;
wherein the first helical radiator and the second helical radiator cooperate to transmit or receive electromagnetic signals. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A method for tuning performance characteristics of an antenna comprising:
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positioning a second helical radiator substantially co-linear with a first helical radiator such that the second helical radiator is moveable between a first position wherein the second helical radiator is substantially adjacent to the first helical radiator, and a second position wherein the second helical radiator is distal from the first helical radiator;
wherein the first helical radiator and the second helical radiator cooperate to transmit or receive electromagnetic signals using at least one link selected from the group consisting of an electrical connection and electromagnetic coupling. - View Dependent Claims (18, 19, 20)
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Specification