Multiple-element antenna

Details Multiple-element antenna Multiple-element antenna

2002-04-09

2003-12-16

Clinger, James (Department: 2821)

Communications: radio wave antennas

Antennas

With radio cabinet

C343S795000, C343S803000

Reexamination Certificate

active

06664930

ABSTRACT:

FIELD OF THE INVENTION
This invention relates generally to the field of multi-feed antennas. More specifically, a multiple-element antenna is provided that is particularly well-suited for use in Personal Digital Assistants, cellular telephones, and wireless two-way email communication devices (collectively referred to herein as “mobile communication devices”).
BACKGROUND OF THE INVENTION
Mobile communication devices having antenna structures that support dual-band communication are known. Many such mobile devices utilize helix or “inverted F” antenna structures, where a helix antenna is typically installed outside of a mobile device, and an inverted F antenna is typically embedded inside of a case or housing of a device. Generally, embedded antennas are preferred over external antennas for mobile communication devices because they exhibit a lower level of SAR (Specific Absorption Rate), which is a measure of the rate of energy absorbed by biological tissues. Many known embedded antenna structures such as the inverted F antenna, however, still exhibit undesirably high SAR levels, and may also provide poor communication signal radiation and reception in many environments.
SUMMARY
A multiple-element antenna includes a monopole portion and a dipole portion. The monopole portion has a top section, a middle section, and a bottom section. The middle section defines a recess between the top and bottom sections, and the bottom section includes a monopole feeding port configured to couple the monopole portion of the multiple-element antenna to communications circuitry in a mobile communication device. The dipole portion has at least one dipole feeding port configured to couple the dipole portion of the multiple-element antenna to communications circuitry in the mobile communications device. The dipole portion of the multiple-element antenna is positioned within the recess defined by the monopole portion of the multiple-element antenna in order to electromagnetically couple the monopole portion with the dipole portion.


REFERENCES:
patent: 3521284 (1970-07-01), Shelton Jr. et al.
patent: 3599214 (1971-08-01), Altmayer
patent: 3622890 (1971-11-01), Fujimoto et al.
patent: 3683376 (1972-08-01), Pronovost
patent: 4024542 (1977-05-01), Ikawa et al.
patent: 4471493 (1984-09-01), Schober
patent: 4504834 (1985-03-01), Garay et al.
patent: 4543581 (1985-09-01), Nemet
patent: 4571595 (1986-02-01), Phillips et al.
patent: 4584709 (1986-04-01), Kneisel et al.
patent: 4590614 (1986-05-01), Erat
patent: 4730195 (1988-03-01), Phillips et al.
patent: 4839660 (1989-06-01), Hadzoglou
patent: 4847629 (1989-07-01), Shimazaki
patent: 4857939 (1989-08-01), Shimazaki
patent: 4890114 (1989-12-01), Egashira
patent: 4894663 (1990-01-01), Urbish et al.
patent: 4975711 (1990-12-01), Lee
patent: 5030963 (1991-07-01), Tadama
patent: 5138328 (1992-08-01), Zibrik et al.
patent: 5214434 (1993-05-01), Hsu
patent: 5218370 (1993-06-01), Blaese
patent: 5227804 (1993-07-01), Oda
patent: 5245350 (1993-09-01), Sroka
patent: 5257032 (1993-10-01), Diamond et al.
patent: 5347291 (1994-09-01), Moore
patent: 5373300 (1994-12-01), Jenness et al.
patent: 5422651 (1995-06-01), Chang
patent: 5451965 (1995-09-01), Matsumoto
patent: 5451968 (1995-09-01), Emery
patent: 5457469 (1995-10-01), Diamond et al.
patent: 5493702 (1996-02-01), Crowley et al.
patent: 5684672 (1997-11-01), Karidis et al.
patent: 5767811 (1998-06-01), Mandai et al.
patent: 5821907 (1998-10-01), Zhu et al.
patent: 5841403 (1998-11-01), West
patent: 5870066 (1999-02-01), Asakura et al.
patent: 5872546 (1999-02-01), Ihara et al.
patent: 5903240 (1999-05-01), Kawahata et al.
patent: 5966098 (1999-10-01), Qi et al.
patent: 5973651 (1999-10-01), Suesada et al.
patent: 5977920 (1999-11-01), Hung
patent: 5990838 (1999-11-01), Burns et al.
patent: 6028568 (2000-02-01), Asakura et al.
patent: 6031505 (2000-02-01), Qi et al.
patent: 6329951 (2001-12-01), Wen et al.
patent: 6337667 (2002-01-01), Ayala et al.
patent: 0543645 (1993-05-01), None
patent: 0571124 (1993-11-01), None
patent: 0765001 (1997-03-01), None
patent: 0814536 (1997-12-01), None
patent: 0892459 (1999-01-01), None
patent: 2330951 (1999-05-01), None
patent: 55147806 (1980-11-01), None
patent: 05007109 (1993-01-01), None
patent: 5129816 (1993-05-01), None
patent: 5267916 (1993-10-01), None
patent: 05347507 (1993-12-01), None
patent: 6204908 (1994-07-01), None
patent: 9638881 (1996-12-01), None
patent: 9733338 (1997-12-01), None
patent: 9812771 (1998-03-01), None
patent: 9903166 (1999-01-01), None
patent: 9925042 (1999-05-01), None
patent: 0001028 (2000-01-01), None
patent: 0178192 (2001-10-01), None

Affiliated with

Also associated with

Rating

Multiple-element antenna does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multiple-element antenna, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiple-element antenna will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3183379