Dual-frequency planar antenna
First Claim
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1. A dual-frequency PIFA (planar inverted-F antenna) is capable to operate in a first operation band and in a second operation band, said dual-frequency PIFA comprising:
- a grounding plane;
a main radiating device coupled to said grounding plane through a first shorting pin, said main radiating device comprises a first resonance mode such that said dual-frequency PIFA is capable of operating in said first operation band;
a feeding means equipped on said grounding plane, said feeding means coupled to said main radiating device to transfer the microwave signal;
a parasitic radiating device coupled to said grounding plane through a second shorting pin, said parasitic radiating device comprises a first resonance mode such that said dual-frequency PIFA is capable of operating in said second operation band, wherein said first resonance mode of said parasitic radiating device is excited by the coupling of energy from said main radiating device; and
a medium positioned between said main radiating device, said parasitic radiating device, and said grounding plane for isolating purpose.
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Abstract
A dual-frequency planar antenna disclosed herein utilizes a main radiating device to produce a resonance mode and excites a parasitic radiating device to produce another resonance mode by the coupling of energy. These two modes can provide sufficiently broad bandwidths, and the present invention is simple in design, which makes it cost effective. Therefore, the planar antenna of the present invention is a competitive alternative for wireless communication applications.
27 Citations
32 Claims
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1. A dual-frequency PIFA (planar inverted-F antenna) is capable to operate in a first operation band and in a second operation band, said dual-frequency PIFA comprising:
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a grounding plane;
a main radiating device coupled to said grounding plane through a first shorting pin, said main radiating device comprises a first resonance mode such that said dual-frequency PIFA is capable of operating in said first operation band;
a feeding means equipped on said grounding plane, said feeding means coupled to said main radiating device to transfer the microwave signal;
a parasitic radiating device coupled to said grounding plane through a second shorting pin, said parasitic radiating device comprises a first resonance mode such that said dual-frequency PIFA is capable of operating in said second operation band, wherein said first resonance mode of said parasitic radiating device is excited by the coupling of energy from said main radiating device; and
a medium positioned between said main radiating device, said parasitic radiating device, and said grounding plane for isolating purpose. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A dual-frequency planar antenna is capable of operating in a first operation band and in a second operation band, said dual-frequency planar antenna comprising:
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a grounding plane;
a main radiating comprising a first resonance mode such that said dual-frequency planar antenna is capable of operating in said first operation band;
a feeding means equipped on said grounding plane, said feeding means coupled to said main radiating device to transfer the microwave signal;
a parasitic radiating device comprising a first resonance mode such that said dual-frequency planar antenna is capable of operating in said second operation band, wherein said first resonance mode of said parasitic radiating device is excited by the coupling of the energy from said main radiating device; and
a medium positioned between said main radiating device, said parasitic radiating device, and said grounding plane for isolating purpose. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification
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Current AssigneeAcer, Inc.
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Original AssigneeIndustrial Technology Research Institute
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InventorsWong, Kin-Lu, Yeh, Shih-Huang, Fang, Shyh-Tirng
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current343/702
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CPC Class CodesH01Q 5/371 Branching current pathsH01Q 5/378 Combination of fed elements...H01Q 9/0421 with a shorting wall or a s...
