Claims
- 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.
- 2. The communication device of claim 1, wherein said first frequency range is lower than said second frequency range.
- 3. The communication device of claim 1, wherein said first frequency range is adjacent said second frequency range.
- 4. The communication device of claim 1, wherein said first and second frequency ranges form a continuous frequency range.
- 5. The communication device of claim 4, wherein said continuous frequency range includes the 1800 MHZ frequency band corresponding to a DCS frequency band.
- 6. The communication device of claim 4, wherein said continuous frequency range includes the 1900 MHZ frequency band corresponding to a PCS frequency band.
- 7. The communication device of claim 4, wherein said continuous frequency range includes the 2 GHz frequency band corresponding to a UMTS frequency band.
- 8. The communication device of claim 1, wherein said main radiating element has a length that is less than a length of the substrate.
- 9. The communication device of claim 1, wherein said main radiating element has a width that is less than a width of the substrate.
- 10. The communication device of claim 1, wherein the parasitic element is located below said main radiating element.
- 11. The communication device of claim 10, wherein the parasitic element is located at a same height as the main radiating element.
- 12. The communication device of claim 1 wherein the substrate is made of porous material.
- 13. A low profile, built-in antenna for a communication device operating in a plurality of frequency bands, said antenna comprising: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.
- 14. The antenna of claim 13, wherein the parasitic element is located below said main radiating element.
- 15. The antenna of claim 13, wherein the parasitic element is located at a same height as said main radiating element.
- 16. The antenna of claim 13, wherein said first and second frequency ranges form a continuous frequency range including the DCS, PCS and UMTS frequency bands.
- 17. 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 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.
- 18. The communication device of claim 17, wherein said first frequency range is lower than said second frequency range.
- 19. The communication device of claim 17, wherein said first frequency range is adjacent said second frequency range.
- 20. The communication device of claim 17, wherein said first and second frequency ranges form a continuous frequency range.
- 21. The communication device of claim 20, wherein said continuous frequency range includes the 1800 MHZ frequency band corresponding to a DCS frequency band.
- 22. The communication device of claim 20, wherein said continuous frequency range includes the 1900 MHZ frequency band corresponding to a PCS frequency band.
- 23. The communication device of claim 20, wherein said continuous frequency range includes the 2 GHz frequency band corresponding to a UMTS frequency band.
- 24. The communication device of claim 17, wherein said main radiating element has a length that is less than a length of the substrate.
- 25. The communication device of claim 17, wherein said main radiating element has a width that is less than a width of the substrate.
- 26. The communication device of claim 17, wherein the parasitic element is located below said main radiating element.
- 27. The communication device of claim 26, wherein the parasitic element is located at a same height as the substrate.
- 28. The communication device of claim 26 wherein the substrate is made of porous material.
- 29. A low profile, built-in antenna for a communication device operating in a plurality of frequency bands, said antenna comprising: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.
- 30. The antenna of claim 29, wherein the parasitic element is located below said main radiating element.
- 31. The antenna of claim 29, wherein the parasitic element is located at a same height as said substrate.
- 32. The antenna of claim 29, wherein said first and second frequency ranges form a continuous frequency range including the DCS, PCS and UMTS frequency bands.
RELATED APPLICATIONS
This application is related to U.S. patent application Ser. No. 09/112,366 to Ying, filed Jul. 9, 1998 and entitled “Miniature Printed Spiral Antenna for Mobile Terminals”, U.S. patent application Ser. No. 09/112,152 to Ying, filed Jul. 9, 1998 and entitled “Printed Twin Spiral Dual Band Antenna”, U.S. patent application No. 09/212,259 to Ying, filed Dec. 16, 1998 and entitled “Printed Multi-Banded Patch Antenna, U.S. patent application Ser. No. 09/387,494 to Ying, filed Sep. 1, 1999 and entitled “Semi Built-In Multi-Band Printed Antenna, and U.S. patent application Ser. No. 09/507,673 to Egorov et al., filed Feb. 22, 2000 and entitled “Small-Size Broad-Band Printed Antenna With Parasitic Element”, all of which are incorporated by reference in their entireties herein.
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