Title:
ANTENNA SYSTEM AND COMMUNICATION DEVICE USING THE SAME
Document Type and Number:
Japanese Patent JP3554960
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an antenna system of one-chip type that copes with two frequencies.
SOLUTION: A feeder side radiation electrode 3 and a parasitic side radiation electrode 4 are formed on an upper face 2 of a rectangular dielectric base 1 of the antenna system, so that exciting directions A, B are orthogonal to each other. Short- circuit sections 8, 9 electromagnetically coupled are formed to a common side face 7. The short-circuit section 8 is connected to the parasitic side radiation electrode 4. One end of the short-circuit section 9 is connected to the feeder side radiation electrode 3, and the other end is connected to a signal source 13. An open end 22 of the feeder side radiation electrode 3 is capacitively coupled with a ground face 16 via an open end electrode 20 of a side face 19. An open end 17 of the feeder side radiation electrode 3 is formed to a side face 14, opposite to the side face 19 and the open end 17, is capacitively coupled with the ground face 16. A signal from a signal source 13 is fed directly to the feeder side radiation electrode 3 to resonate the dielectric base 1 at a set frequency. Furthermore, the signal from the signal source 13 is fed to the parasitic side radiation electrode 4 via electromagnetic field coupling of the short-circuit sections 8, 9 to resonate the dielectric base 1 at the other setting frequency.
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Inventors:
Shoji Nagumo
Nobuto Tsubaki
Kazuya Kawabata
Nobuto Tsubaki
Kazuya Kawabata
Application Number:
JP17967699A
Publication Date:
August 18, 2004
Filing Date:
June 25, 1999
Export Citation:
Assignee:
MURATA MANUFACTURING CO.,LTD.
International Classes:
H01Q1/24; H01Q1/38; H01Q5/00; H01Q9/04; H01Q9/42; H01Q13/08; H01Q19/26; H01Q13/26; H01Q19/00; H01Q21/30; H04B1/38; (IPC1-7): H01Q21/30; H01Q1/24; H01Q1/38; H01Q13/08; H01Q19/26; H04B1/38
Domestic Patent References:
| JP6069715A | ||||
| JP11127014A | ||||
| JP11004117A | ||||
| JP5308223A | ||||
| JP9219610A | ||||
| JP10013139A | ||||
| JP11004113A | ||||
| JP7162225A | ||||
| JP1013138A |
Attorney, Agent or Firm:
Kiyoshi Igarashi