Antenna

Details Antenna Antenna

2006-02-21

2006-02-21

Tran, Thuy V. (Department: 2821)

Communications: radio wave antennas

Antennas

With radio cabinet

C343S7000MS

Reexamination Certificate

active

07002519

ABSTRACT:
A method of independently modifying the ¼ and/or the ¾ wavelength resonant frequency in an open-ended slotted PIFA antenna, an open-ended slotted PIFA antenna comprisingan antenna feed and an antenna ground wherein the antenna ground is associated with the antenna short-circuit end, and an open-ended slot having an open-end associated with the antenna open-circuit end, andwherein the antenna ground and the slot are mutually arranged to provide operational variations in the current density between the open and short circuit ends of the antenna and around the perimeter of the slot, and an operational mean current path length between the open and short circuit ends of the antenna and around the perimeter of the open-ended slot, the mean current path length determining the ¼ and ¾ wavelength resonant frequencies for the open-ended slotted PIFA antenna,the method comprising determining operational variations in current density around the perimeter of a pre-modified open-ended slotted PIFA antenna and modifying the mean current path length around the perimeter of the pre-modified open-ended slot in regions of comparatively high current density.

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Salonen et al., “New slot configurations for dual-Band Planar Inverted-F Antenna” Microwave and Optical Technology Letters, vol. 28, No. 5, Jan. 23, 2001, pp. 293-298.
Salonen, P., et al: “New Slot Configurations for Dual-Band Planar Inverted-F Antenna”, appearing in Microwave and Optical Technology Letters, John Wiley, New York, NY, US, vol. 28, No. 5, Jan. 23, 2001, pp. 293-298, XP002245702, ISSN: 0895-2477.
Fu-Ren Hsiao et al: “A dual-Band Planar Inverted-F Patch Antenna with a Branch-Line Slit”, appearing in Microwave and Optical Technology Letters, John Wiley, New York, NY, US, vol. 32, No. 4, Feb. 20, 2002, pp. 310-312, XP002246573, ISSN: 0895-2477.
Jung-Hyo Kim et al: “Frequency Tuning of Slot-Loaded Rectangular Patch Antenna With Tuning Stubs and Gaps”, appearing in IEEE Antennas and Propagation Society International Symposium, 2001 Digest. APS. Boston, MA, Jul. 8-13, 2001, New York, NY: IEEE US vol., vol. 1 of 4, Jul. 8, 2001, pp. 298-301, XP010564287, ISBN: 0-7803-7070-8.
Pekka Salonen, Mikko Keskilammi and Markku Kivikoski;New Slot Configurations for Dual-Band Planar Inverted-F Antenna; Microwave and Optical Technology Letters; Mar. 5, 2001; pp.293-298; vol. 28, No. 5.

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