KR970077984A - Reflection type coupled double mode surface acoustic wave (SAW) filter - Google Patents

Reflection type coupled double mode surface acoustic wave (SAW) filter Download PDF

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Publication number
KR970077984A
KR970077984A KR1019960015294A KR19960015294A KR970077984A KR 970077984 A KR970077984 A KR 970077984A KR 1019960015294 A KR1019960015294 A KR 1019960015294A KR 19960015294 A KR19960015294 A KR 19960015294A KR 970077984 A KR970077984 A KR 970077984A
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South Korea
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surface acoustic
interdigital transducers
acoustic wave
substrate
filter
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Ceased
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KR1019960015294A
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Korean (ko)
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김강보
이만형
노용래
김학봉
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곽정소
한국전자 주식회사
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Publication of KR970077984A publication Critical patent/KR970077984A/en
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Abstract

본 발명은 표면탄성파(SAW: Surface Acoustic Wave) 필터에 관한 것으로서, 특히 기존 패턴이 갖는 제반 특성과 구성요소를 유지하면서 주파수 통과 대역을 확장시킬 수 있는 반사형 종결합 이중 모드 표면탄성파 필터에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface acoustic wave (SAW) filter, and more particularly to a reflection type longitudinally coupled dual mode surface acoustic wave filter capable of expanding a frequency pass band while maintaining various characteristics and constituent elements of an existing pattern .

본 발명의 반사형 종결합 이중 모드 SAW 필터는 표면탄성파를 전파하기 위한 물질로 구성된 기판 ; 상기 기판 상에 형성되어 전기적인 입력신호를 표면탄성파로 변환하는 복수의 입력 인터디지탈 트랜스듀서 ; 상기 기판 상에 상기 복수의 인터디지탈 트랜스듀서 각각의 양 측면에 형성되어 발생한 표면탄성파를 수신하는 복수의 출력 인터디지탈 트랜스듀서 ; 및 상기 기판 상에 상기 복수의 출력 인터디지탈 트랜스듀서 양 외측의 적어도 한 측에 전극지 일부가 비주기적인 간격으로 형성되어 상기 복수의 입력 인터디지탈 트랜스듀서에서 발생한 표면탄성파를 다중 반사하는 반사기를 구비한 것을 특징으로 한다.The reflective type longitudinally coupled dual mode SAW filter of the present invention comprises a substrate composed of a material for propagating a surface acoustic wave; A plurality of input interdigital transducers formed on the substrate for converting electrical input signals into surface acoustic waves; A plurality of output interdigital transducers for receiving surface acoustic waves generated on both sides of each of the plurality of interdigital transducers on the substrate; And a reflector for forming a plurality of electrode fingers on at least one side of the plurality of output interdigital transducers on the substrate in an aperiodic interval to reflect the surface acoustic waves generated by the plurality of input interdigital transducers .

Description

반사형 종결합 이중 모드 표면탄성파(SAW) 필터Reflection type coupled double mode surface acoustic wave (SAW) filter

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제 3 도는 본 발명에 따른 반사형 종결합 이중 모드 SAW 필터의 기본 구성을 보인 도면, 제 4 도는 본 발명에 따른 반사형 종결합 이중 모드 SAW 필터를 상하 2단으로 연결한 구조를 보인 도면.FIG. 3 is a view showing a basic configuration of a reflective type longitudinally coupled double mode SAW filter according to the present invention; FIG. 4 is a view showing a structure in which a reflective type longitudinally coupled dual mode SAW filter according to the present invention is connected in two upper and lower stages;

Claims (3)

표면탄성파를 전파하기 위한 물질로 구성된 기판 ; 상기 기판 상에 형성되어 전기적인 입력신호를 표면탄성파로 변환하는 복수의 입력 인터디지탈 트랜스듀서 ; 상기 기판 상에 상기 복수의 인터디지탈 트랜스듀서 각각의 양 측면에 형성되어 발생한 표면탄성파를 수신하는 복수의 출력 인터디지탈 트랜스듀서 ; 및 상기 기판 상에 상기 복수의 출력 인터디지탈 트랜스듀서 양 외측의 적어도 한 측에 전극지 배열 일부가 비주기적인 간격으로 형성되어 상기 복수의 입력 인터디지탈 트랜스듀서에서 발생한 표면탄성파를 다중 반사하는 반사기를 구비한 것을 특징으로 하는 반사형 종결합 이중 모드 표면탄성파 필터.A substrate made of a material for propagating a surface acoustic wave; A plurality of input interdigital transducers formed on the substrate for converting electrical input signals into surface acoustic waves; A plurality of output interdigital transducers for receiving surface acoustic waves generated on both sides of each of the plurality of interdigital transducers on the substrate; And a plurality of electrode finger arrays formed on at least one side of the plurality of output interdigital transducers on the substrate at aperiodic intervals to reflect the surface acoustic waves generated by the plurality of input interdigital transducers And a reflection type longitudinal mode coupling dual mode surface acoustic wave filter. 제 1 항에 있어서, 상기와 같은 구성을 가진 반사형 종결합 이중 모드 표면탄성파 필터를 동일 기판 상에 각 단의 출력 인터디지탈 트랜스듀서들이 다음 단의 출력 인터디지탈 트랜스듀서에 전기적인 신호선으로 연결되는 형태의 다단으로 연결된 것을 특징으로 하는 반사형 종결합 이중 모드 표면탄성파 필터.The reflective type longitudinally coupled dual mode SAW filter as claimed in claim 1, wherein the output type interdigital transducers of each stage are connected to the output interdigital transducer of the next stage by electrical signal lines on the same substrate Type multi-stage type longitudinal mode coupled dual mode surface acoustic wave filter. 제 1 항에 있어서, 상기와 같은 구성을 가진 반사형 종결합 이중 모드 표면탄성파 필터를 각각 분리된 기판 상에 각 단의 출력 인터디지탈 트랜스듀서들이 다음 단의 출력 인터디지탈 트랜스듀서에 전기적인 신호선으로 연결되어 형태의 다단으로 연결된 것을 특징으로 하는 반사형 종결합 이중 모드 표면탄성파 필터.The method according to claim 1, wherein each of the output interdigital transducers on each of the reflective type longitudinally coupled double mode surface acoustic wave filters having the above-described structure is connected to the output interdigital transducer And connected in a cascaded fashion. ≪ RTI ID = 0.0 > 16. < / RTI > ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed by the contents of the first application.
KR1019960015294A 1996-05-10 1996-05-10 Reflection type coupled double mode surface acoustic wave (SAW) filter Ceased KR970077984A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019960015294A KR970077984A (en) 1996-05-10 1996-05-10 Reflection type coupled double mode surface acoustic wave (SAW) filter

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Application Number Priority Date Filing Date Title
KR1019960015294A KR970077984A (en) 1996-05-10 1996-05-10 Reflection type coupled double mode surface acoustic wave (SAW) filter

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