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US006424304B1
(12) United States Patent ao) Patent No.: us 6,424,304 Bi
Jan et al. (45) Date of Patent: Jul. 23,2002
(54) ANTENNA APPARATUS
(75) Inventors: Cheng-Geng Jan, Hsin-Chu Hsien;
Wei-Li Cheng, Taipei; Chien-Hsing
Fang, Taichung Shien, all of (TW)
(73) Assignee: Acer NeWeb Corp. (TW)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 0 days.
(21) Appl. No.: 09/877,100
(22) Filed: Jun. 11, 2001
(51) Int. C I. H01Q 1/24
(52) U.S. CI 343/702; 343/860; 343/700 MS
(58) Field of Search 343/700 MS, 702,
343/725, 846, 850, 852, 853, 860, 861,
893
(56) References Cited
U.S. PATENT DOCUMENTS
4,803,491 A * 2/1989 Hikuma 343/702
5,550,554 A * 8/1996 Erkocevic 343/702
6,252,561 Bl * 6/2001 Wu et al 343/741
An antenna apparatus for providing wireless communication comprise a first antenna plate, a second antenna plate and a matched circuit. The matched circuit has a front line and a transferring line so as to be formed as an appropriate impedance between the first antenna plate and the second antenna plate, wherein one end of the transferring line is coupled to the front line forming a T shaped converging portion having a first feedback point and a second feedback point. The first antenna plate has an electrical foot connecting to the first feedback point and a ground foot connecting to the ground. Similarly, the second antenna plate has an electrical foot connecting to the second feedback point and a ground foot connecting to the ground.
20 Claims, 6 Drawing Sheets
