High efficiency, multi-band antenna for a radio communication device
First Claim
Patent Images
1. A communication device for use in a radio communication system, said device comprising:
- a microphone opening for allowing the communication device to receive auditory information from a user;
a speaker opening for allowing the communication device to transmit auditory information to said user;
a keypad; and
a multiple band, swivel antenna comprising;
a small multi-band resonant antenna element;
a sleeve comprising a first arm and a second arm tuned to first and second frequency bands, respectively; and
a coaxial feeding cable for connecting said small multi-band resonant antenna element and said sleeve to a chassis of said communication device;
wherein a length of said coaxial feeding cable is selected so as to increase antenna efficiency of said communication device.
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Abstract
The present invention provides a radio communication device having a multi-band swivel antenna assembly. The antenna assembly includes a multi-band radiating antenna element and a multi-band sleeve which allows the antenna to be tuned to multiple resonances. The multi-band antenna element and sleeve are attached to the chassis of the communication device via a coaxial feeding cable which serves to isolate those elements from the chassis.
56 Citations
35 Claims
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1. A communication device for use in a radio communication system, said device comprising:
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a microphone opening for allowing the communication device to receive auditory information from a user; a speaker opening for allowing the communication device to transmit auditory information to said user; a keypad; and a multiple band, swivel antenna comprising; a small multi-band resonant antenna element; a sleeve comprising a first arm and a second arm tuned to first and second frequency bands, respectively; and a coaxial feeding cable for connecting said small multi-band resonant antenna element and said sleeve to a chassis of said communication device; wherein a length of said coaxial feeding cable is selected so as to increase antenna efficiency of said communication device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An antenna for a radio communication device, said antenna comprising:
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a radiating portion comprising; a small multi-band resonant antenna element; and a multi-band sleeve comprising a first arm and a second arm tuned to different frequency bands; and a coaxial feeding cable for connecting said radiating portion to a chassis of said radio communication device. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An antenna for a radio communication device comprising:
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a radiating portion comprising; a small multi-band radiating antenna element; and a multi-band sleeve comprising a first arm and a second arm tuned to different frequencies. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A radiating portion of an antenna comprising:
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a sleeve comprising a first arm and a second arm tuned to a first and a second frequency band, respectively; wherein said first frequency band is lower than said second frequency band. - View Dependent Claims (31, 32, 33, 34, 35)
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Specification