Title:
ANTENNA CONTROL CIRCUIT
Document Type and Number:
Japanese Patent JP3508845
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an antenna control circuit in which diversity of 1st and 2nd antennas can freely be arranged without reducing the substrate area and a phase shift circuit is not needed any more.
SOLUTION: This control circuit is provided with a 1st antenna 13 for transmitting/receiving a communication signal, a 2nd chip antenna 14 arranged with a prescribed distance provided from the antenna 13, a 1st antenna terminal 15 which is switched from the antenna 13 and operates, a 2nd antenna terminal 16 which is switched from the antenna 14 and operates, a 1st antenna switch 11 which are respectively connected to the antennas 13 and 14 and the terminals 15 and 16 and switches and selects them and a 2nd antenna switch 12 which switches and selects the antenna 14 and the terminal 16 according to a switching operation of the switch 11 while the antenna 14 and the terminal 16 can be connected to the switch 11 through a shared line L1.
Inventors:
Yamamoto, Kenji
Application Number:
JP2000112625A
Publication Date:
March 22, 2004
Filing Date:
April 13, 2000
Export Citation:
Assignee:
KENWOOD CORP
International Classes:
H01Q3/24; H01Q1/24; H04B7/04; H04B7/26; (IPC1-7): H04B7/04; H01Q1/24; H01Q3/24; H04B7/26
Attorney, Agent or Firm:
萩原 誠
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