Low profile built-in multi-band antenna
First Claim
1. A communication device for use in a short-range, wireless mode, said device comprising:
- a receiver for allowing the communication device to receive information from a user;
a transmitter for allowing the communication device to transmit information to said user;
an input means;
a built-in planar inverted F-type antenna (PIFA) having a main radiating element which comprises a ground pin and a feeding pin and is located at a first predetermined height above a substrate within said communication device and tuned to a first frequency range; and
a parasitic element located at a second predetermined height in between said substrate and said main radiating element and tuned to a second frequency range that is different from said first frequency range.
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Abstract
A built-in, low-profile antenna having an inverted planar inverted F-type (PIFA) antenna and a meandering parasitic element having a wide bandwidth to facilitate communications within a plurality of frequency bands is disclosed. The main element is placed at a predetermined height above a substrate of a communication device and the parasitic element is placed on the same substrate as the main antenna element and is grounded at one end. The feeding pin of the PIFA is proximal to the ground pin of the parasitic element. The coupling of the meandering, parasitic element to the main antenna results in two resonances. These two resonances are adjusted to be adjacent to each other in order to realize a broader resonance encompassing the DCS, PCS and UMTS frequency ranges.
145 Citations
32 Claims
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1. A communication device for use in a short-range, wireless mode, said device comprising:
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a receiver for allowing the communication device to receive information from a user;
a transmitter for allowing the communication device to transmit information to said user;
an input means;
a built-in planar inverted F-type antenna (PIFA) having a main radiating element which comprises a ground pin and a feeding pin and is located at a first predetermined height above a substrate within said communication device and tuned to a first frequency range; and
a parasitic element located at a second predetermined height in between said substrate and said main radiating element and tuned to a second frequency range that is different from said first frequency range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A low profile, built-in antenna for a communication device operating in a plurality of frequency bands, said antenna comprising:
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a built-in planar inverted F-type antenna (PIFA) having a main radiating element which comprises a ground pin and a feeding pin and is located at a first predetermined height above a substrate within said communication device and tuned to a first frequency range, and a parasitic element located at a second predetermined height in between said substrate and said main radiating element and tuned to a second frequency range that is different from said first frequency range. - View Dependent Claims (14, 15, 16)
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17. A communication device for use in a short-range, wireless mode, said device comprising:
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a receiver for allowing the communication device to receive information from a user;
a transmitter for allowing the communication device to transmit information to said user;
an input means;
a built-in planar inverted F-type antenna (PIFA) having a main radiating element which comprises a ground pin and a feeding pin and is located at a predetermined height above a substrate and at a first predetermined distance from an edge of said substrate within said communication device and tuned to a first frequency range; and
a parasitic element located on the same plane as the substrate and at a second predetermined distance from the edge of said substrate and tuned to a second frequency range that is different from said first frequency range. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A low profile, built-in antenna for a communication device operating in a plurality of frequency bands, said antenna comprising:
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a built-in planar inverted F-type antenna (PIFA) having a main radiating element which comprises a ground pin and a feeding pin and is located at a first predetermined height above a substrate and at a first predetermined distance from an edge of said substrate within said communication device and tuned to a first frequency range, and a parasitic element located on the same plane as the substrate and at a second predetermined distance from the edge of said substrate and tuned to a second frequency range that is different from said first frequency range. - View Dependent Claims (30, 31, 32)
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Specification