Communications: radio wave antennas – Antennas – Microstrip
Reexamination Certificate
2006-07-18
2006-07-18
Phan, Tho (Department: 2821)
Communications: radio wave antennas
Antennas
Microstrip
C343S846000
Reexamination Certificate
active
07079077
ABSTRACT:
A wireless communication device includes an antenna configured with two conductive elements separated by an insulating medium providing a separation distance. One conductive element is a ground plane and the other is a microstrip line. The microstrip line and the ground plane exhibit a characteristic impedance that may vary along the length of the microstrip line. The separation distance of the microstrip line from the ground plane is changed to reduce the resonant frequency of the microstrip line. A second microstrip line with an open end and another end shorted to the ground plane is operative to prevent RF current from flowing on the backside of the ground plane. A backside of the ground plane and the second microstrip line may be covered with a lossy magnetic medium to reduce the near field in the space above the backside of the ground plane.
REFERENCES:
patent: 4839659 (1989-06-01), Stern et al.
patent: 5144320 (1992-09-01), Stern et al.
patent: 5278569 (1994-01-01), Ohta et al.
patent: 5389937 (1995-02-01), Kaloi
patent: 5504466 (1996-04-01), Chan-Son-Lint et al.
patent: 6133878 (2000-10-01), Lee
patent: 6281847 (2001-08-01), Lee
patent: 6313798 (2001-11-01), Bancroft et al.
patent: 6369760 (2002-04-01), Nalbandian et al.
patent: 6552686 (2003-04-01), Ollikainen et al.
patent: 6628241 (2003-09-01), Fukushima et al.
patent: 6633262 (2003-10-01), Shoji et al.
patent: 6759990 (2004-07-01), Rossman
patent: 6919857 (2005-07-01), Shamblin et al.
patent: 2003/0034920 (2003-02-01), Lee
patent: 2003/0151556 (2003-08-01), Cohen
Lee, et al., “A Simple Circular-Polarized Antenna: Circular Waveguide Horn Coated with Lossy Magnetic Material,”IEEE Transactions on Antennas and Propagation, vol. 36, No. 2, Feb. 1998. pp. 297-300.
Lee, et al., “Electrically Small Microstrip Antennas,”IEEE AP-S International Symposium Digest, 2000, pp. 778-781.
Lee, et al., “Size Reduction of Microstrip Antennas,”Electronic Letters,vol. 37, No. 21, Oct. 11, 2001, pp. 1274-1275.
Tseng, et al., “Enhanced Radiation Efficiency of Electrically Small Microstrip Antennas,”Microwave and Optical Technology Letters, Oct. 2003, pp. 62-64, Letter 39.
Phan Tho
Southern Methodist University
LandOfFree
Methods and apparatus for implementation of an antenna for a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods and apparatus for implementation of an antenna for a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and apparatus for implementation of an antenna for a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3608795