High efficiency elastic convolver using KNbO3 substrate

K. Yamanouchi; H. Odagawa; K. Morozumi; Y. Cho

High efficiency elastic convolver using KNbO₃ substrate

K. Yamanouchi, H. Odagawa, K. Morozumi, Y. Cho

Information Devices Division

Research output: Contribution to journal › Conference article › peer-review

3 Citations (Scopus)

Abstract

Elastic convolvers are very important for signal processing devices of the spread spectrum communication (SSC) systems. The better efficient convolvers are required for the application for the spread spectrum and next stage communication systems. A high value of coupling coefficient is very important for wideband and high efficiency SAW devices such as SAW convolvers. Potassium niobate (KNbO₃) has large piezoelectric constants and very large electromechanical coupling coefficient (K²) of 0.53 for the surface acoustic waves which is about 10 times larger than that of LiNbO₃. Therefore the high efficient elastic SAW convolvers using KNbO₃ substrates are expected. In this paper, the rotated 60°Y-cut, X-propagating KNbO₃ substrates are used for a convolver. The experimental results show that the efficiency of the convolver using 60°Y-X KNbO₃ is 15 dB higher than of the convolver using Y-Z LiNbO₃.

Original language	English
Pages (from-to)	335-338
Number of pages	4
Journal	Proceedings of the IEEE Ultrasonics Symposium
Volume	1
Publication status	Published - 1997 Dec 1
Event	Proceedings of the 1997 IEEE Ultrasonics Symposium. Part 1 (of 2) - Toronto, Can Duration: 1997 Oct 5 → 1997 Oct 8

ASJC Scopus subject areas

Acoustics and Ultrasonics

Cite this

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title = "High efficiency elastic convolver using KNbO3 substrate",

abstract = "Elastic convolvers are very important for signal processing devices of the spread spectrum communication (SSC) systems. The better efficient convolvers are required for the application for the spread spectrum and next stage communication systems. A high value of coupling coefficient is very important for wideband and high efficiency SAW devices such as SAW convolvers. Potassium niobate (KNbO3) has large piezoelectric constants and very large electromechanical coupling coefficient (K2) of 0.53 for the surface acoustic waves which is about 10 times larger than that of LiNbO3. Therefore the high efficient elastic SAW convolvers using KNbO3 substrates are expected. In this paper, the rotated 60°Y-cut, X-propagating KNbO3 substrates are used for a convolver. The experimental results show that the efficiency of the convolver using 60°Y-X KNbO3 is 15 dB higher than of the convolver using Y-Z LiNbO3.",

author = "K. Yamanouchi and H. Odagawa and K. Morozumi and Y. Cho",

year = "1997",

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language = "English",

volume = "1",

pages = "335--338",

journal = "Proceedings - IEEE Ultrasonics Symposium",

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note = "Proceedings of the 1997 IEEE Ultrasonics Symposium. Part 1 (of 2) ; Conference date: 05-10-1997 Through 08-10-1997",

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TY - JOUR

T1 - High efficiency elastic convolver using KNbO3 substrate

AU - Yamanouchi, K.

AU - Odagawa, H.

AU - Morozumi, K.

AU - Cho, Y.

PY - 1997/12/1

Y1 - 1997/12/1

N2 - Elastic convolvers are very important for signal processing devices of the spread spectrum communication (SSC) systems. The better efficient convolvers are required for the application for the spread spectrum and next stage communication systems. A high value of coupling coefficient is very important for wideband and high efficiency SAW devices such as SAW convolvers. Potassium niobate (KNbO3) has large piezoelectric constants and very large electromechanical coupling coefficient (K2) of 0.53 for the surface acoustic waves which is about 10 times larger than that of LiNbO3. Therefore the high efficient elastic SAW convolvers using KNbO3 substrates are expected. In this paper, the rotated 60°Y-cut, X-propagating KNbO3 substrates are used for a convolver. The experimental results show that the efficiency of the convolver using 60°Y-X KNbO3 is 15 dB higher than of the convolver using Y-Z LiNbO3.

AB - Elastic convolvers are very important for signal processing devices of the spread spectrum communication (SSC) systems. The better efficient convolvers are required for the application for the spread spectrum and next stage communication systems. A high value of coupling coefficient is very important for wideband and high efficiency SAW devices such as SAW convolvers. Potassium niobate (KNbO3) has large piezoelectric constants and very large electromechanical coupling coefficient (K2) of 0.53 for the surface acoustic waves which is about 10 times larger than that of LiNbO3. Therefore the high efficient elastic SAW convolvers using KNbO3 substrates are expected. In this paper, the rotated 60°Y-cut, X-propagating KNbO3 substrates are used for a convolver. The experimental results show that the efficiency of the convolver using 60°Y-X KNbO3 is 15 dB higher than of the convolver using Y-Z LiNbO3.

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M3 - Conference article

AN - SCOPUS:0031363394

SN - 1051-0117

VL - 1

SP - 335

EP - 338

JO - Proceedings - IEEE Ultrasonics Symposium

JF - Proceedings - IEEE Ultrasonics Symposium

T2 - Proceedings of the 1997 IEEE Ultrasonics Symposium. Part 1 (of 2)

Y2 - 5 October 1997 through 8 October 1997

ER -

High efficiency elastic convolver using KNbO₃ substrate

Abstract

ASJC Scopus subject areas

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