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Patent Searching and Data


Title:
ANTENNA SWITCHING DEVICE
Document Type and Number:
Japanese Patent JPH11340702
Kind Code:
A
Abstract:

To provide an antenna switching device between a transmission stage and a reception stage securing high frequency switching with small loss.

This antenna switching device between the output of the transmission stage and the input of the reception stage is provided with a piezoelectric actuator formed of two fixed plates 21 and 22 forming a capacitor and a movable contact point 23 composed of a piezoelectric material. The surfaces on an inner side of the plates 21 and 22 are locally coated with a metal so as to form an electric contact point and an electrode is provided on the movable contact point 23 so as to apply a control voltage capable of deforming the contact point. The deformation is generated between a rest position corresponding to the determined part of the plates 21 and 22 and a working position corresponding to the other determined part of the plates 21 and 22. The device is applied to a mobile telephone.


Inventors:
Jacob, Herve
Application Number:
JP1999000063076
Publication Date:
December 10, 1999
Filing Date:
March 10, 1999
Export Citation:
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Assignee:
KONINKL PHILIPS ELECTRONICS NV
International Classes:
H01H57/00; H01P1/10; H04B1/44; H04B1/48; H04B1/56; (IPC1-7): H01P1/10; H01H57/00; H04B1/44
Attorney, Agent or Firm:
杉村 暁秀 (外5名)