GB1576455A - Surface wave filters or delay lines - Google Patents

Surface wave filters or delay lines Download PDF

Info

Publication number
GB1576455A
GB1576455A GB17055/77A GB1705577A GB1576455A GB 1576455 A GB1576455 A GB 1576455A GB 17055/77 A GB17055/77 A GB 17055/77A GB 1705577 A GB1705577 A GB 1705577A GB 1576455 A GB1576455 A GB 1576455A
Authority
GB
United Kingdom
Prior art keywords
feeders
delay line
filter
transducers
fingers
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB17055/77A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Corp
Original Assignee
Siemens Corp
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.)
Filing date
Publication date
Application filed by Siemens Corp filed Critical Siemens Corp
Publication of GB1576455A publication Critical patent/GB1576455A/en
Expired legal-status Critical Current

Links

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
    • H03H9/125—Driving means, e.g. electrodes, coils
    • H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
    • H03H9/14544—Transducers of particular shape or position
    • H03H9/1455—Transducers of particular shape or position constituted of N parallel or series transducers
    • 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
    • H03H9/02—Details
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02818—Means for compensation or elimination of undesirable effects
    • H03H9/02858—Means for compensation or elimination of undesirable effects of wave front distortion
    • 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
    • H03H9/125—Driving means, e.g. electrodes, coils
    • H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
    • H03H9/14517—Means for weighting
    • H03H9/1452—Means for weighting by finger overlap length, apodisation

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
GB17055/77A 1976-04-26 1977-04-25 Surface wave filters or delay lines Expired GB1576455A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2618210A DE2618210C3 (de) 1976-04-26 1976-04-26 Wandlerelektroden für Filter oder Verzögerungsleitungen nach dem Oberflächenwellenprinzip

Publications (1)

Publication Number Publication Date
GB1576455A true GB1576455A (en) 1980-10-08

Family

ID=5976265

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17055/77A Expired GB1576455A (en) 1976-04-26 1977-04-25 Surface wave filters or delay lines

Country Status (7)

Country Link
US (1) US4160219A (enExample)
JP (1) JPS52130550A (enExample)
BR (1) BR7702585A (enExample)
DE (1) DE2618210C3 (enExample)
FR (1) FR2350001A1 (enExample)
GB (1) GB1576455A (enExample)
IT (1) IT1084935B (enExample)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5847090B2 (ja) * 1977-08-10 1983-10-20 株式会社村田製作所 弾性表面波フイルタ
FR2428350A1 (fr) * 1978-06-06 1980-01-04 Thomson Csf Filtre a ondes elastiques de surface et etage de frequence intermediaire d'un recepteur de television comprenant un tel filtre
US4604595A (en) * 1982-06-16 1986-08-05 Murata Manufacturing Co., Ltd. Surface acoustic wave device having interdigitated comb electrodes weighted for odd/even response
USRE33957E (en) * 1982-07-26 1992-06-09 Toyo Communication Equipment Co., Ltd. High frequency narrow-band multi-mode filter
GB2132844A (en) * 1982-12-22 1984-07-11 Philips Electronic Associated Surface acoustic wave device
US4535265A (en) * 1984-05-17 1985-08-13 Kabushiki Kaisha Toshiba Surface acoustic wave transducer with internal acoustic reflection
US4918349A (en) * 1987-11-13 1990-04-17 Hitachi, Ltd. Surface acoustic wave device having apodized transducer provided with irregular pitch electrode group
JPH02189015A (ja) * 1989-01-17 1990-07-25 Clarion Co Ltd 弾性表面波装置
JPH0685597A (ja) * 1992-09-02 1994-03-25 Mitsubishi Electric Corp 弾性表面波装置
US6791236B1 (en) * 2000-10-11 2004-09-14 Yuri Abramov Method utilizing the saw velocity dispersion effect for weighting by shaping the electrode fingers of a saw interdigital transducer and apparatus produced thereby
DE102010055628B4 (de) 2010-12-22 2018-09-06 Snaptrack, Inc. Elektroakustischer Resonator

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2040881A5 (enExample) * 1969-04-16 1971-01-22 Thomson Csf
GB1355418A (en) * 1971-05-24 1974-06-05 Mullard Ltd Acoustic surface wave devices
GB1430725A (en) * 1974-08-02 1976-04-07 Mullard Ltd Acoustic surface wave devices

Also Published As

Publication number Publication date
DE2618210B2 (de) 1979-07-12
DE2618210A1 (de) 1977-11-10
JPS52130550A (en) 1977-11-01
DE2618210C3 (de) 1980-03-13
FR2350001B1 (enExample) 1980-01-18
BR7702585A (pt) 1978-01-10
FR2350001A1 (fr) 1977-11-25
US4160219A (en) 1979-07-03
IT1084935B (it) 1985-05-28

Similar Documents

Publication Publication Date Title
US3810257A (en) Acoustic surface wave transducer configuration for reducing triple transit signals
GB1576455A (en) Surface wave filters or delay lines
EP0092290B1 (en) Acoustic surface wave device
US3662293A (en) Acoustic-wave transmitting device
GB1574062A (en) Elastic surface wave device
US4097825A (en) Surface acoustic wave tapped delay line
US4066985A (en) Television IF filter constructed in accordance with the surface wave principle
US3972011A (en) Surface elastic wave electromechanical device
GB1562841A (en) Surface acoustic wave apparatus
EP0031685B2 (en) Surface acoustic wave device
US4263569A (en) Surface acoustic wave arrangement with improved suppression of spurious signals
GB1604186A (en) Acoustic surface wave device
GB2064256A (en) Surface acoustic wave devices and system including such devices
GB2123637A (en) Surface acoustic wave device
CA1300255C (en) Surface wave delay line with antireflective electrodes
US4333065A (en) Low reflectivity apodized surface acoustic transducer with means to prevent wavefront distortion
US4025880A (en) Elastic surface wave transmitting device for eliminating multiple transit echoes
US4346322A (en) Elastic surface wave device
CA1089083A (en) Acoustic surface wave devices
US4237432A (en) Surface acoustic wave filter with feedforward to reduce triple transit effects
GB1581740A (en) Surface wave filters or delay lines
US4375624A (en) Surface wave acoustic device with compensation for spurious frequency response modes
US6836197B2 (en) Dual track SAW reflector filter using weighted reflective gratings
US4504759A (en) SAW Device with special length-weighted interdigital electrode array
US4390807A (en) Surface acoustic wave device

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee