Selectable length meander line antenna
First Claim
1. A selectable length meander line antenna system, comprising:
- a first meander line radiating antenna portion operably interconnected to an RF feed and a tuning circuit;
a switch element operably interconnected to said first meander line radiating antenna portion at an end thereof away from said RF feed;
a second meander line radiating antenna portion operably interconnected to said switch element; and
a controller operably interconnected to said switch element,wherein said switch element is operable to receive a signal from said controller and electrically connect said second meander line radiating antenna portion to said first meander line radiating antenna portion.
1 Assignment
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Accused Products
Abstract
A single antenna element with a switchable extension may be used to change the size of the radiating surface and provide an antenna that has two or more separate center frequencies. The range of frequencies that may be tuned by the antenna is enhanced, while maintaining relatively low complexity tuning and matching circuitry. Switching for the extension is performed by a switching element that is located at the point of connection of the extension to the antenna element. A control line supplies a control signal to the switching element to enable and disable the extension. The control line is positioned in close proximity to the antenna element to enhance coupling between the antenna element and the control line.
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Citations
20 Claims
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1. A selectable length meander line antenna system, comprising:
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a first meander line radiating antenna portion operably interconnected to an RF feed and a tuning circuit; a switch element operably interconnected to said first meander line radiating antenna portion at an end thereof away from said RF feed; a second meander line radiating antenna portion operably interconnected to said switch element; and a controller operably interconnected to said switch element, wherein said switch element is operable to receive a signal from said controller and electrically connect said second meander line radiating antenna portion to said first meander line radiating antenna portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A RF system for receiving and/or transmitting RF signals over a range of RF frequencies, comprising:
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an antenna element comprising a first antenna portion and an antenna extension; an application processor; a tuning circuit operably interconnected with said application processor and said antenna element and operable to tune said antenna element to receive and/or transmit a RF signal at a frequency received from said application processor; a switch operably interconnected with said antenna element and operable to electrically connect/disconnect said first antenna portion and said antenna extension; and a control line operably interconnected to said switch and to said application processor, wherein said switch receives a signal from said control line and connects/disconnects said first antenna portion and said antenna extension based on said signal, and wherein said control line is in close proximity to said first antenna portion. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A method for tuning an antenna over a frequency range that is greater than the range of frequencies capable of being tuned by tuning and matching circuitry associated with the antenna, comprising:
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operating the antenna at a first frequency using a first meander line radiating antenna segment; determining a second frequency at which the antenna is to operate; actuating a switch to couple the first meander line radiating antenna segment with a second meander line radiating antenna segment when the second frequency is outside of a frequency range capable of being tuned using the tuning and matching circuitry and the first meander line radiating antenna segment. - View Dependent Claims (18, 19, 20)
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Specification