Title:
ANTENNA SYSTEM FOR RADIO UNIT AND PORTABLE RADIO UNIT WITH THE SAME
Document Type and Number:
Japanese Patent JP3930015
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To use a common antenna element to accomplish a multiband antenna in simple configuration.
SOLUTION: An antenna system for a radio unit is provided with: a conductor ground plate 1 provided in a radio unit casing and having a ground potential; a first radio circuit 2 corresponding to a system of a first frequency band and a second radio circuit 3 corresponding to a system of a second frequency band lower than the first frequency band, the first and second radio circuits being provided within the conductor ground plate 1; a first feeder 4 that is an inner conductor of a coaxial transmission line including an outer conductor 5 disposed along the conductor ground plate 1; an antenna element 6 connected to each of the first feeder 4 and the outer conductor 5 and disposed along the conductor ground plate 1; and a second feeder 7 connecting the second radio circuit 3 and the outer conductor 5, wherein the first feeder 4 feeds high frequency power inputted from the first radio circuit 2 and the second feeder 8 feeds high frequency power inputted from the second radio circuit 3.
Inventors:
Kiyoshi Egawa
Yoshio Koyanagi
Hiroshi Haruki
Yoshio Koyanagi
Hiroshi Haruki
Application Number:
JP2004357328A
Publication Date:
June 13, 2007
Filing Date:
December 09, 2004
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
H01Q1/24; H01Q3/24; H01Q5/10; H01Q9/16; H01Q13/08; H04M1/02
Domestic Patent References:
| JP2001345625A | ||||
| JP2000341017A | ||||
| JP6508019A | ||||
| JP6350322A | ||||
| JP11136016A | ||||
| JP10150319A | ||||
| JP8097617A | ||||
| JP2003087023A |
Attorney, Agent or Firm:
Takeshi Takamatsu
Toshimitsu Ichikawa
Kimihide Hashimoto
Toshimitsu Ichikawa
Kimihide Hashimoto