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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 16. Отображено 16.
01-09-2010 дата публикации

High-temperature stability acoustic surface wave filter suitable for high frequency

Номер: CN0101820266A
Автор: LI HONGLANG, HONGLANG LI
Принадлежит:

The invention discloses an acoustic surface wave filter capable of realizing high-temperature stability and high frequency at the same time. The structure of the acoustic surface wave filter comprises a piezoelectric substrate, an input interdigital transducer and an output interdigital transducer manufactured on the surface of the piezoelectric substrate, and a waveguide layer covered on the piezoelectric substrate, the input interdigital transducer and the output interdigital transducer, wherein the piezoelectric substrate is made of crystal material lithium tetraborate (the tangential is (0.47, 3.90) suitable for high frequency and positive temperature stability; and the waveguide layer is made of ZnO with high-voltage coupling coefficient and negative temperature coefficient. The input interdigital transducer excites acoustic wave in the piezoelectric substrate by using piezoelectric effect to finish electric-acoustic conversion. The output interdigital transducer receives the acoustic ...

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Номер записи: 1
09-09-2009 дата публикации

Packaging structure of love wave sensor

Номер: CN0101527552A
Автор: LI HONGLANG, CHEN YE, HE SHITANG, HONGLANG LI, YE CHEN, SHITANG HE
Принадлежит:

The invention relates to a packaging structure of a love wave sensor, which comprises a love wave sensor, wherein an input interdigital transducer and an output interdigital transducer of the love wave sensor are positioned on the left and the right sides of a sensitive film. The packaging structure is characterized by further comprising a microfluidic chip, and the microfluidic chip is correspondingly bonded on the love wave sensor; a groove is arranged on the contact surface of the microfluidic chip and the love wave sensor and is bonded with the love wave sensor to form an input interdigital transducer cavity, an output interdigital transducer cavity and a sensitive film cavity which are not mutually communicated; and a plurality of micro-channels are also arranged on the surface of the contact part of the microfluidic chip and the love wave sensor and positioned at the upper and the lower sides of the sensitive film, one end of each micro-channel is communicated with the sensitive film ...

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Номер записи: 2
10-02-2010 дата публикации

Surface acoustic wave sensor with low loss and high temperature stability

Номер: CN0101644611A
Автор: LI HONGLANG, CHENG LINA, HE SHITANG, HONGLANG LI, LINA CHENG, SHITANG HE
Принадлежит:

The invention provides a surface acoustic wave sensor with low loss and high temperature stability, which comprises a piezoelectric substrate, an input interdigital transducer and an output interdigital transducer which are deposited on the piezoelectric substrate and sensitive membranes covered on the piezoelectric substrate, the input interdigital transducer and the output interdigital transducer. The piezoelectric substrate is made of crystal materials with high electromechanical coupling factor and high temperature stability, and the piezoelectric substrate adopts LGS, LGT, LGN, gallium phosphate, Sr3TaGa3Si2O14, Sr3NbGa3Si2O14, Ca3TaGa3Si2O14, Ca3NbGa3Si2O14, Sr3Ga2Ge4O14 and lithium tetraborate. The input interdigital transducer excites and spreads acoustic waves in the piezoelectricsubstrate, the output interdigital transducer is used for receiving the acoustic waves, when a loaded object to be tested reacts with the sensitive membranes, the features of the acoustic waves are changed ...

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Номер записи: 3
10-02-2010 дата публикации

Acoustic surface wave icing sensor capable of accessing wirelessly

Номер: CN0101644772A
Автор: LI HONGLANG, JIANG CHENG, HE SHITANG, HONGLANG LI, CHENG JIANG, SHITANG HE
Принадлежит:

The invention provides an acoustic surface wave icing sensor capable of accessing wirelessly, which is used for sensitive detection for icing phenomenon on the surface of an object. The acoustic surface wave icing sensor capable of accessing wirelessly comprises a piezoelectric substrate, a waveguide layer, an interdigital transducer, a reflecting grating and an antenna, wherein the interdigital transducer and the reflecting grating are deposited on the piezoelectric substrate and used for transmitting and receiving the acoustic surface wave through piezoelectric effect and inverse piezoelectric effect. The waveguide layer is attached to the piezoelectric substrate, and is positioned between the interdigital transducer and the reflecting grating or extended to two sides from the interdigital transducer and the reflecting grating and covers the interdigital transducer and the reflecting grating. In addition, the acoustic surface wave icing sensor also comprises an encapsulation layer for ...

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Номер записи: 4
10-02-2010 дата публикации

Bridge type surface acoustic wave transducer in micro-optical-electro-mechanical gyroscope

Номер: CN0101645698A
Автор: LI HONGLANG, HE SHITANG, MENG YANBIN, CHEN SHUFEN, ZHAO YI, HONGLANG LI, SHITANG HE, YANBIN MENG, SHUFEN CHEN, YI ZHAO
Принадлежит:

The invention relates to a bridge type surface acoustic wave transducer in a micro-optical-electro-mechanical gyroscope. An embedded strip-shaped acoustic-optical waveguide region is produced on a substrate material, the bridge type surface acoustic wave transducer is further provided with a pressure welding electrode, interdigital electrodes and a bridging electrode, electrode structures of the interdigital electrodes are divided into two groups and respectively positioned on the upper side and the lower side of the acoustic-optical waveguide region with the interval of less than six sound wave wavelengths, and the two groups of the interdigital electrodes are connected through the bridging electrode and penetrate the acoustic-optical waveguide region. When a driving power supply is imposed between the upper group and the lower group of the surface acoustic wave interdigital electrodes for generating surface acoustic waves, an acoustic wave field of the acoustic-optical waveguide region ...

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Номер записи: 5
10-02-2010 дата публикации

Bulk acoustic wave sensor with high stability

Номер: CN0101644695A
Автор: CHENG LINA, LI HONGLANG, HE SHITANG, LINA CHENG, HONGLANG LI, SHITANG HE
Принадлежит:

The invention provides a bulk acoustic wave sensor with high stability, which comprises a piezoelectric substrate, an upper surface electrode and a lower surface electrode deposited on the upper surface and the lower surface of the piezoelectric substrate and a sensitive membrane covered on the upper surface electrode, and the bulk acoustic wave sensor is characterized in that the sensitive membrane adopts a semiconductor type sensitive material. Wherein, the sensor adopts the bulk wave mode, the sensitive membrane adopts the semiconductor type sensitive material, and acoustic waves are transferred from one surface of a piezoelectric crystal to the other surface and spread in the crystal. When a loaded object to be tested reacts with the sensitive membrane, the features of the acoustic waves are changed, and a conclusion of the features of the object to be tested is obtained by detecting the changes. The bulk acoustic wave sensor utilizes the mature design technology of the bulk wave sensor ...

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Номер записи: 6
09-09-2009 дата публикации

Unidirectional low-loss love wave sensor

Номер: CN0101526501A
Автор: LI HONGLANG, CHEN YE, HE SHITANG, HONGLANG LI, YE CHEN, SHITANG HE
Принадлежит:

The invention relates to a unidirectional low-loss love wave sensor. The love wave sensor comprises a piezoelectric substrate, an input interdigital transducer and an output interdigital transducer, where in the input interdigital transducer and the output interdigital transducer are respectively deposited at both ends of the piezoelectric substrate, a waveguide layer is covered on the piezoelectric substrate and adopts a low acoustic velocity film which has lower shear wave velocity than the piezoelectric substrate, and a sensitive film is covered at the middle part of the waveguide layer and is placed between the input interdigital transducer and the output interdigital transducer. The unidirectional low-loss love wave sensor is characterized in that both the input interdigital transducer and the output interdigital transducer adopt a single-phase unidirectional transducer; the waveguide layer adopts gold, silicon dioxide, polymethylmethacrylate or epoxy rein; the sensitive film can be ...

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Номер записи: 7
03-11-2010 дата публикации

Field programmable surface acoustic wave radio frequency electronic tag

Номер: CN0101877073A
Автор: LI HONGLANG, CHENG LINA, HE SHITANG, HONGLANG LI, LINA CHENG, SHITANG HE
Принадлежит:

The invention relates to a field programmable surface acoustic wave radio frequency electronic tag. The electronic tag comprises a piezoelectric substrate, a transmitting interdigital transducer and a group of distributed reflecting grating arrays, wherein both ends of each reflecting grating of the surface acoustic wave electronic tag are provided with contacts; the distributed reflecting gratings are not connected one another; the surface acoustic wave electronic tag also comprises an integrated circuit chip which is laminated with the electronic tag and has switching function; external contacts of the integrated circuit chip are arranged in one-to-one correspondence with the contacts of the reflecting grating array of the surface acoustic wave electronic tag; and open-circuit connection and short-circuit connection of any two contacts of the distributed reflecting grating array are controlled through a field programming control switch circuit. Combined with a conventional integrated ...

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Номер записи: 8
10-02-2010 дата публикации

Love wave gas sensor

Номер: CN0101644696A
Автор: LI HONGLANG, LIU JIULING, CHENG LINA, HE SHITANG, HONGLANG LI, JIULING LIU, LINA CHENG, SHITANG HE
Принадлежит:

The invention provides a love wave gas sensor which comprises a piezoelectric substrate, an input interdigital transducer, an output interdigital transducer and sensitive films, wherein the input interdigital transducer and the output interdigital transducer are deposited on the surface of the piezoelectric substrate, the sensitive films are covered on the piezoelectric substrate, the input interdigital transducer and the output interdigital transducer, the sensitive films are semiconductor-type gas sensitive material layers, the input interdigital transducer excites and spreads sound waves inthe piezoelectric substrate, the output interdigital transducer is used for receiving the sound waves, the characteristics of the sound waves can be changed after a loaded measured object reacts withthe sensitive films, and the characteristic conclusion about the measured object is acquired through detecting the changes. The love wave gas sensor can overcome the defect of lower detection lower limit ...

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Номер записи: 9
10-12-2008 дата публикации

Broadband low loss sonic surface wave switchable wave filter group

Номер: CN0101320965A
Автор: HE SHITANG, LIU JIULING, LI HONGLANG, LIU MINGHUA, SHITANG HE, JIULING LIU, HONGLANG LI, MINGHUA LIU
Принадлежит:

The invention relates to a wide band and low loss switch surface acoustic wave filter pack, composed of two single-pole knife multithrow switches and a plurality of surface acoustic wave filters made of heavy metal films, wherein one switch is used for respectively connecting the input ends of a plurality of surface acoustic wave filters, and the other switch is used for connecting the output end of the plurality of surface acoustic wave filters, and the two switches are in one to one correspondence. The surface acoustic wave filter adopts the vertical coupled resonance to reduce the low inserting loss. The transducer and the reflection strip with the vertical coupled resonance type structure adopt the heavy metal film, to obtain the wider bandwidth. The substrate material adopts the piezoelectricity materials of lithium niobate and lithium tantalate and the like. The invention provides a wide band (the single channel relative bandwidth 9%) and low loss (smaller than 4 db containing the ...

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Номер записи: 10
17-09-2003 дата публикации

Sound surface wave fan shaped filter having single phase single direction structure

Номер: CN0001442951A
Автор: LI HONGLANG, HE SHITANG, HONGLANG LI, SHITANG HE
Принадлежит:

The present invention relates to a fan-shaped filter for surface acoustic wave with single-phase and-single-direction structure includes two fan-shaped transducers made up by using the semiconductor plane process along the propagating direction of acoustic wave on a piezoelectric substrate, and the said transducer adopts the single-phase and single-direction structure and can be divided into any number of subfilters along the direction of surface acoustic wave, among which the subfilters use serial connection, parallel connection or serial-parallel mixed connection between themselves. Under certain rectangle factor of the device, the fan-shaped filter can have its length decreased by one half.

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Номер записи: 11
15-08-2012 дата публикации

Single-mode protruding double-end resonant surface acoustic wave detector

Номер: CN0101865884B
Автор: SHITANG HE, HONGLANG LI, SHUNZHOU LI, JIULING LIU, MINGHUA LIU, HE SHITANG, LI HONGLANG, LI SHUNZHOU, LIU JIULING, LIU MINGHUA
Принадлежит:

The invention relates to a single-mode protruding double-end resonant surface acoustic wave detector, which comprises three interdigital transducers and two metal reflecting grating arrays on a piezoelectric chip. The three interdigital transducers are arranged with identical spacing of 0-100 time(s) of the wavelength (0.25) of the interdigital transducers; the spacing between the first metal reflecting grating array and an adjacent first interdigital transducer thereof is identical to the spacing between the second metal reflecting grating array and an adjacent third interdigital transducer thereof, and the spacing is 1-10 time(s) of the wavelength (0.25) of the interdigital transducers; and the synchronous frequencies of the three interdigital transducers are identical and are 0.95-1.05time(s) of the synchronous frequency of the metal reflecting grating arrays, and the energy amplitude difference of two vertical modes in the frequency response curve is more than 5dB. The surface acoustic ...

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Номер записи: 12
06-10-2010 дата публикации

Broadband low loss sonic surface wave switchable wave filter group

Номер: CN0101320965B
Автор: LIU MINGHUA, HE SHITANG, LI HONGLANG, LIU JIULING, MINGHUA LIU, SHITANG HE, HONGLANG LI, JIULING LIU
Принадлежит:

The invention relates to a wide band and low loss switch surface acoustic wave filter pack, composed of two single-pole knife multithrow switches and a plurality of surface acoustic wave filters made of heavy metal films, wherein one switch is used for respectively connecting the input ends of a plurality of surface acoustic wave filters, and the other switch is used for connecting the output endof the plurality of surface acoustic wave filters, and the two switches are in one to one correspondence. The surface acoustic wave filter adopts the vertical coupled resonance to reduce the low inserting loss. The transducer and the reflection strip with the vertical coupled resonance type structure adopt the heavy metal film, to obtain the wider bandwidth. The substrate material adopts the piezoelectricity materials of lithium niobate and lithium tantalate and the like. The invention provides a wide band (the single channel relative bandwidth 9%) and low loss (smaller than 4 db containing the ...

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Номер записи: 13
29-09-2010 дата публикации

Surface acoustic wave radio frequency electronic tag with large data capacity

Номер: CN0101847216A
Автор: LINA CHENG, SHITANG HE, HONGLANG LI, JIULING LIU, CHENG LINA, HE SHITANG, LI HONGLANG, LIU JIULING
Принадлежит:

The invention relates to a surface acoustic wave radio frequency electronic tag with large data capacity, which comprises a piezoelectric substrate, an interdigital transducer and a distribution-type reflection grating array, wherein the interdigital transducer and the distribution-type reflection grating array are arranged on the piezoelectric substrate, and is characterized in that a second interdigital transducer is arraned between propagation paths of a first interdigital transducer and a first distribution-type reflection grating array; a second distribution-type reflection grating arrayis arranged between pulse intervals of encoderless interval of a pulse signal of the first distribution-type reflection grating array, and the second distribution-type reflection grating array is used for forming a surface acoustic wave electronic tag for another frequency together with the second interdigital transducer. On the basis of single interdigital tranducer and single distribution-type reflection ...

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Номер записи: 14
20-10-2010 дата публикации

Single-mode protruding double-end resonant surface acoustic wave detector

Номер: CN0101865884A
Автор: SHITANG HE, HONGLANG LI, SHUNZHOU LI, JIULING LIU, MINGHUA LIU, HE SHITANG, LI HONGLANG, LI SHUNZHOU, LIU JIULING, LIU MINGHUA
Принадлежит:

The invention relates to a single-mode protruding double-end resonant surface acoustic wave detector, which comprises three interdigital transducers and two metal reflecting grating arrays on a piezoelectric chip. The three interdigital transducers are arranged with identical spacing of 0-100 time(s) of the wavelength (0.25) of the interdigital transducers; the spacing between the first metal reflecting grating array and an adjacent first interdigital transducer thereof is identical to the spacing between the second metal reflecting grating array and an adjacent third interdigital transducer thereof, and the spacing is 1-10 time(s) of the wavelength (0.25) of the interdigital transducers; and the synchronous frequencies of the three interdigital transducers are identical and are 0.95-1.05 time(s) of the synchronous frequency of the metal reflecting grating arrays, and the energy amplitude difference of two vertical modes in the frequency response curve is more than 5dB. The surface acoustic ...

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Номер записи: 15
14-03-2012 дата публикации

Bridge type surface acoustic wave transducer in micro-optical-electro-mechanical gyroscope

Номер: CN0101645698B
Автор: LI HONGLANG, HE SHITANG, MENG YANBIN, CHEN SHUFEN, ZHAO YI, HONGLANG LI, SHITANG HE, YANBIN MENG, SHUFEN CHEN, YI ZHAO
Принадлежит:

The invention relates to a bridge type surface acoustic wave transducer in a micro-optical-electro-mechanical gyroscope. An embedded strip-shaped acoustic-optical waveguide region is produced on a substrate material, the bridge type surface acoustic wave transducer is further provided with a pressure welding electrode, interdigital electrodes and a bridging electrode, electrode structures of the interdigital electrodes are divided into two groups and respectively positioned on the upper side and the lower side of the acoustic-optical waveguide region with the interval of less than six sound wave wavelengths, and the two groups of the interdigital electrodes are connected through the bridging electrode and penetrate the acoustic-optical waveguide region. When a driving power supply is imposed between the upper group and the lower group of the surface acoustic wave interdigital electrodes for generating surface acoustic waves, an acoustic wave field of the acoustic-optical waveguide region ...

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Номер записи: 16