Title:
SIGNAL SYNTHESIS CIRCUIT AND ANTENNA SYSTEM USING THE SAME
Document Type and Number:
Japanese Patent JP3933529
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a signal synthesis circuit that reduces the effect on the circuit characteristics due to dispersion in components.
SOLUTION: A capacitor 17j being a third capacitive element is added to a VICS (Vehicle Information and Communication System) high pass filter 17 consisting of second capacitive elements 17c, 17d and an inductive element 17g and passing a radio wave signal of a prescribed high frequency band in the signal synthesis circuit 15. Thus a trap circuit for trapping a radio wave signal of a lower frequency band received with a GPS antenna element is constructed so as to easily achieve isolation, and the constants of the components of the trap circuit are selected larger to reduce the effect on the circuit characteristics due to dispersion in the components.
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| JPH0897662 | LC COMPOSITE COMPONENT |
Inventors:
Satoru Torizumi
Fukuchi Minoru
Fukuchi Minoru
Application Number:
JP2002173470A
Publication Date:
June 20, 2007
Filing Date:
June 13, 2002
Export Citation:
Assignee:
THE FURUKAW ELECTRIC CO.,LTD.
International Classes:
H03H7/075; H04B1/18; H03H7/46; (IPC1-7): H04B1/18; H03H7/075; H03H7/46
Domestic Patent References:
| JP11097962A | ||||
| JP2001267843A |
Attorney, Agent or Firm:
Hiroaki Sakai