Title:
OPTICAL MODULATOR
Document Type and Number:
WIPO Patent Application WO/2017/057351
Kind Code:
A1
Abstract:
Provided is an optical modulator which suppresses occurrence of a phenomenon, such as a resonance mode, in a recessed portion of a casing containing a flexible circuit board therein, and which has improved wide band characteristics. This optical modulator having an optical modulation element contained in a casing, is characterized by having a flexible circuit board 6 connected to at least a portion of an electric line to an external circuit board 7, and by being arranged on the external circuit board, wherein: a recessed portion (a region indicated by a dotted line D) containing the flexible circuit board therein is formed at a portion, in the outer bottom surface of the casing, where the flexible circuit board is connected and arranged; and the optical modulator is provided with a means (for example, an uneven shape 21) for suppressing a resonance mode, etc., so as to prevent occurrence of a microwave/millimeter-wave resonance mode or parallel plate mode among a surface A of the recessed portion facing the flexible circuit board, an electric wiring section B provided on the flexible circuit board so as to overlap the surface A in plan view, and an electric wiring section C provided on the external circuit board so as to overlap the surface A in plan view.
Inventors:
KATOU KEI (JP)
KATAOKA TOSHIO (JP)
ICHIKAWA JUNICHIRO (JP)
KATAOKA TOSHIO (JP)
ICHIKAWA JUNICHIRO (JP)
Application Number:
PCT/JP2016/078429
Publication Date:
April 06, 2017
Filing Date:
September 27, 2016
Export Citation:
Assignee:
SUMITOMO OSAKA CEMENT CO LTD (JP)
International Classes:
G02F1/01
Foreign References:
| JP2014179432A | 2014-09-25 | |||
| JPH06188322A | 1994-07-08 | |||
| JP2010074794A | 2010-04-02 | |||
| US20110221649A1 | 2011-09-15 | |||
| JP2014195061A | 2014-10-09 |
Attorney, Agent or Firm:
TAMURA Chikashi et al. (JP)
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