Communications: radio wave antennas – Antennas – Slot type
Reexamination Certificate
2006-08-15
2006-08-15
Le, Hoanganh (Department: 2821)
Communications: radio wave antennas
Antennas
Slot type
C343S767000
Reexamination Certificate
active
07091920
ABSTRACT:
A slot antenna apparatus10contains a circuit substrate having a high-frequency circuit arranged therein and a shield case accommodating the circuit substrate. A cross-shaped slot and a feeding pin are formed in an upper plate of the shield case. The cross-shaped slot is composed of first and second slots. The lengths of the slots are different and the slots are perpendicular to each other. The shortest distances from the feeding pin to the first slots are approximately equal. When the power is fed to the upper plate through the feeding pin, the slots are excited to irradiate linearly polarized waves perpendicular to each other, respectively.
REFERENCES:
patent: 4371877 (1983-02-01), Doussot et al.
patent: 4803494 (1989-02-01), Norris et al.
patent: 6593891 (2003-07-01), Zhang
patent: 6646618 (2003-11-01), Sievenpiper
patent: 2003/0122726 (2003-07-01), Abbasi et al.
patent: 2004/0196200 (2004-10-01), Sievenpiper
patent: 100 59 027 (2001-06-01), None
patent: 07-226618 (1995-08-01), None
patent: 2003-234615 (2003-08-01), None
patent: WO 02/084800 (2002-10-01), None
Compact Circularly-Polarised Circular Microstrip Antenna With Cross-slot and Peripheral Cuts, Wen-Shyang, Chen et al, Electronics Letters, May 28, 1998, vol. 34 No. 11, XP006009860.
Single-Feed Circularly Polarized Equilateral-Triangular Microstrip Antenna with a Tuning Stub, Jui-Han, Lu et al., IEEE Transactions On Antennas and Propagation, Dec. 2000, vol. 48, No. 12, XP001005156.
Copy of Search Report dated Dec. 14, 2004 for European Patent Application No. EP 04 02 6802.
Alps Electric Co. ,Ltd.
Le Hoang-anh
LandOfFree
Circular polarization slot antenna apparatus capable of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Circular polarization slot antenna apparatus capable of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circular polarization slot antenna apparatus capable of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3714421