DK46591A - SURFACE WAVE INTERDIGITAL TRANSDUCERS AND SURFACE WAVE FILTERS WITH SYMMETRIC OR PRESERVED ASSYMMETRIC TRANSFER CHARACTERISTICS BETWEEN INPUT AND OUTPUT - Google Patents

SURFACE WAVE INTERDIGITAL TRANSDUCERS AND SURFACE WAVE FILTERS WITH SYMMETRIC OR PRESERVED ASSYMMETRIC TRANSFER CHARACTERISTICS BETWEEN INPUT AND OUTPUT Download PDF

Info

Publication number: DK46591A
Authority: DK; Denmark
Prior art keywords: surface wave; assymmetric; preserved; symmetric; input
Prior art date: 1988-09-28

Application number

DK046591A

Other languages

Danish (da)

Other versions

DK46591D0 (en

Inventor

Kimon Anemogiannis

Original Assignee

Siemens Ag

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1988-09-28

Filing date

1991-03-15

Publication date

1991-03-15

1991-03-15 Application filed by Siemens Ag filed Critical Siemens Ag

1991-03-15 Publication of DK46591D0 publication Critical patent/DK46591D0/en

1991-03-15 Publication of DK46591A publication Critical patent/DK46591A/en

Classifications

- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
- H03H9/02—Details
- H03H9/02535—Details of surface acoustic wave devices
- H03H9/02818—Means for compensation or elimination of undesirable effects
- H03H9/02842—Means for compensation or elimination of undesirable effects of reflections
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
- H03H9/46—Filters
- H03H9/64—Filters using surface acoustic waves
- H03H9/6489—Compensation of undesirable effects

Landscapes

Physics & Mathematics (AREA)
Acoustics & Sound (AREA)
Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)

DK046591A 1988-09-28 1991-03-15 SURFACE WAVE INTERDIGITAL TRANSDUCERS AND SURFACE WAVE FILTERS WITH SYMMETRIC OR PRESERVED ASSYMMETRIC TRANSFER CHARACTERISTICS BETWEEN INPUT AND OUTPUT DK46591A (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE3832944A DE3832944A1 (en)	1988-09-28	1988-09-28	SURFACE WAVE INTERDIGITAL CONVERTER AND SURFACE WAVE FILTER WITH SYMMETRICAL OR PRESETABLE UNSYMMETRIC TRANSMISSION CHARACTERISTICS BETWEEN INPUT AND OUTPUT
PCT/DE1989/000552 WO1990003692A1 (en)	1988-09-28	1989-08-23	Surface wave interdigital transducer and surface wave filter with symmetrical or predetermined asymmetrical transfer characteristic between input and output

Publications (2)

Publication Number	Publication Date
DK46591D0 DK46591D0 (en)	1991-03-15
DK46591A true DK46591A (en)	1991-03-15

Family

ID=6363896

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
DK046591A DK46591A (en)	1988-09-28	1991-03-15	SURFACE WAVE INTERDIGITAL TRANSDUCERS AND SURFACE WAVE FILTERS WITH SYMMETRIC OR PRESERVED ASSYMMETRIC TRANSFER CHARACTERISTICS BETWEEN INPUT AND OUTPUT

Country Status (9)

Country	Link
EP (1)	EP0436565B1 (en)
JP (1)	JP3172523B2 (en)
DE (2)	DE3832944A1 (en)
DK (1)	DK46591A (en)
ES (1)	ES2015483A6 (en)
GR (1)	GR890100593A (en)
PT (1)	PT91821B (en)
WO (1)	WO1990003692A1 (en)
ZA (1)	ZA897341B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE4018784A1 (en) *	1990-06-12	1991-12-19	Siemens Ag	Surface wave reflection filter
DE4212517C2 (en) *	1992-04-14	1995-02-23	Siemens Ag	Surface wave arrangement with at least two surface wave structures adjacent in the direction of the main wave propagation
JP3341709B2 (en) *	1998-06-01	2002-11-05	株式会社村田製作所	Surface wave device and communication device using the same

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS5320840A (en) *	1976-08-11	1978-02-25	Hitachi Ltd	Acoustic surface wave device
US4254387A (en) *	1977-10-06	1981-03-03	U.S. Philips Corporation	Acoustic wave devices
JPS57202114A (en) *	1981-06-05	1982-12-10	Hitachi Ltd	Band pass filter
JPS58156211A (en) *	1982-03-11	1983-09-17	Nec Corp	Surface acoustic wave resonator type filter

1988
- 1988-09-28 DE DE3832944A patent/DE3832944A1/en not_active Withdrawn
1989
- 1989-08-23 EP EP89909380A patent/EP0436565B1/en not_active Expired - Lifetime
- 1989-08-23 WO PCT/DE1989/000552 patent/WO1990003692A1/en active IP Right Grant
- 1989-08-23 DE DE8989909380T patent/DE58903755D1/en not_active Expired - Fee Related
- 1989-08-23 JP JP50888489A patent/JP3172523B2/en not_active Expired - Fee Related
- 1989-09-20 GR GR890100593A patent/GR890100593A/en unknown
- 1989-09-27 PT PT91821A patent/PT91821B/en not_active IP Right Cessation
- 1989-09-27 ZA ZA897341A patent/ZA897341B/en unknown
- 1989-09-28 ES ES8903285A patent/ES2015483A6/en not_active Expired - Lifetime
1991
- 1991-03-15 DK DK046591A patent/DK46591A/en not_active Application Discontinuation

Also Published As

Publication number	Publication date
DK46591D0 (en)	1991-03-15
ZA897341B (en)	1990-06-27
DE3832944A1 (en)	1990-04-05
JP3172523B2 (en)	2001-06-04
WO1990003692A1 (en)	1990-04-05
ES2015483A6 (en)	1990-08-16
EP0436565A1 (en)	1991-07-17
PT91821B (en)	1995-08-09
GR890100593A (en)	1990-10-31
JPH03502867A (en)	1991-06-27
PT91821A (en)	1990-03-30
DE58903755D1 (en)	1993-04-15
EP0436565B1 (en)	1993-03-10

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Legal Events

Date	Code	Title	Description
1994-04-25	AHB	Application shelved due to non-payment