Antenna arrangement
First Claim
1. An antenna arrangement for radio communication in a first radio communication band and for communication in a second radio communication band comprising:
- a multiple-resonance antenna element having a feed for connection to radio frequency circuitry; and
an antenna load connected to the feed of the antenna element as a shunt network and comprising a plurality of reactive components including a first reactive component that controls the impedance of the antenna load for the first radio communication band and a second reactive component, separate from the first reactive component, that controls the impedance of the antenna load for the second radio communication band wherein the plurality of reactive components of the antenna load are configured to provide an impedance that changes between being inductive at a first frequency in the first radio communication band to being capacitive at a second frequency in the first radio communication band and that changes between being inductive at a third frequency in the second radio communication band to being capacitive at a fourth frequency in the second radio communication band.
5 Assignments
0 Petitions
Accused Products
Abstract
An antenna arrangement for radio communication in a first radio communication band and for communication in a second radio communication band including a multiple-resonance antenna element having a feed for connection to radio frequency circuitry; and a load connected to the feed and comprising a plurality of reactive components including a first reactive component that controls the impedance of the load for the first radio communication band and a second reactive component, separate from the first reactive component, that controls the impedance of the load for the second radio communication band wherein the plurality of reactive components of the load are configured to provide an impedance that changes between being inductive at a first frequency in the first radio communication band to being capacitive at a second frequency in the first radio communication band and that changes between being inductive at a third frequency in the second radio communication band to being capacitive at a fourth frequency in the second radio communication band.
17 Citations
23 Claims
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1. An antenna arrangement for radio communication in a first radio communication band and for communication in a second radio communication band comprising:
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a multiple-resonance antenna element having a feed for connection to radio frequency circuitry; and an antenna load connected to the feed of the antenna element as a shunt network and comprising a plurality of reactive components including a first reactive component that controls the impedance of the antenna load for the first radio communication band and a second reactive component, separate from the first reactive component, that controls the impedance of the antenna load for the second radio communication band wherein the plurality of reactive components of the antenna load are configured to provide an impedance that changes between being inductive at a first frequency in the first radio communication band to being capacitive at a second frequency in the first radio communication band and that changes between being inductive at a third frequency in the second radio communication band to being capacitive at a fourth frequency in the second radio communication band. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 23)
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14. A method comprising:
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using a multiple-resonance antenna element having a feed connected to radio frequency circuitry; and compensating for a frequency dependent reactance of the antenna element by providing a parallel frequency dependent impedance load connected to the feed of the antenna element as a shunt network and that comprises a plurality of reactive components including a first reactive component selected to control the impedance of the load for a first radio communication band and a second reactive component, separate from the first reactive component, that is selected to control the impedance of the load for a second radio communication band wherein the plurality of reactive components of the load are configured to provide an impedance that changes between being inductive at a first frequency in the first radio communication band to being capacitive at a second frequency in the first radio communication band and that changes between being inductive at a third frequency in the second radio communication band to being capacitive at a fourth frequency in the second radio communication band.
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15. An apparatus comprising:
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multiple-resonance radio transmission means; a feed for coupling radio frequency circuitry to the radio transmission means; and loading means for loading the radio transmission means, wherein the loading means is connected to the feed as a shunt network and comprises a plurality of reactive components including a first reactive component that controls the impedance of the load for the first radio communication band and a second reactive component, separate from the first reactive component, that controls the impedance of the load for the second radio communication band wherein the plurality of reactive components of the load are configured to provide an impedance that changes between being inductive at a first frequency in the first radio communication band to being capacitive at a second frequency in the first radio communication band and that changes between being inductive at a third frequency in the second radio communication band to being capacitive at a fourth frequency in the second radio communication band.
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16. An antenna arrangement for radio communication in a first radio communication band and for communication in a second radio communication band comprising:
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a multiple-resonance antenna element having a feed for connection to radio frequency circuitry; and a load connected to the feed as a shunt network and comprising a plurality of reactive components including a first reactive component that controls a first resonance of the load to fall within the first radio communication band and a second reactive component, separate from the first reactive component, that controls a second resonance of the load to fall within the second radio communication band. - View Dependent Claims (17, 18)
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19. An antenna arrangement for radio communication in a first radio communication band and for communication in a second radio communication band comprising:
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a multiple-resonance antenna element having a feed for connection to radio frequency circuitry; and a compact antenna load connected to the feed as a shunt network and comprising a compact configuration of reactive components adjacent the antenna element that provide an impedance that changes between being inductive at a first frequency in the first radio communication band to being capacitive at a second frequency in the first radio communication band and that changes between being inductive at a third frequency in the second radio communication band to being capacitive at a fourth frequency in the second radio communication band.
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20. An antenna arrangement for radio communication in a first radio communication band and for communication in a second radio communication band comprising:
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a multiple-resonance antenna element having a feed for connection to radio frequency circuitry; and a load connected to the feed as a shunt network and comprising a capacitor, an inductor and one or more additional reactive components wherein the components of the load are configured to provide an impedance that changes between being inductive at a first frequency in the first radio communication band to being capacitive at a second frequency in the first radio communication band and that changes between being inductive at a third frequency in the second radio communication band to being capacitive at a fourth frequency in the second radio communication band.
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21. An antenna arrangement for radio communication in a first radio communication band and for communication in a second radio communication band comprising:
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a multiple-resonance antenna element having a feed for connection to radio frequency circuitry; and an antenna load connected to the feed as a shunt network and comprising a plurality of reactive components, including a capacitor, that define a first resonant circuit and a second resonant circuit, wherein the first resonant circuit has a resonance at a frequency within the first radio communication band and the second resonant circuit has a resonance at a frequency within the second radio communication band.
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22. An antenna arrangement for radio communication in a first radio communication band and for communication in a second radio communication band comprising:
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a multiple-resonance antenna element having a feed for connection to radio frequency circuitry; and an antenna load connected to the feed as a shunt network and comprising only microwave circuit components configured to provide an impedance that changes between being inductive at a first frequency in the first radio communication band to being capacitive at a second frequency in the first radio communication band and that changes between being inductive at a third frequency in the second radio communication band to being capacitive at a fourth frequency in the second radio communication band.
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Specification