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Proceedings of the IEEE

Issue 5 • May 1976

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Displaying Results 1 - 25 of 53
  • [Front cover and table of contents]

    Publication Year: 1976, Page(s): c1
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    Freely Available from IEEE
  • Scanning the issue

    Publication Year: 1976, Page(s):579 - 580
    Cited by:  Papers (1)
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    Freely Available from IEEE
  • Surface acoustic waves and SAW materials

    Publication Year: 1976, Page(s):581 - 595
    Cited by:  Papers (100)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1228 KB)

    Material parameters necessary for optimum design of surface-acoustic-wave (SAW) devices are reviewed. Velocity, coupling coefficient, power flow angle, temperature coefficients, propagation loss (including air loading, diffraction, and beam steering), and equivalent circuit parameters are considered. A brief introduction to the nature of surface waves is followed by sufficient theoretical informat... View full abstract»

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  • Optimum cut for rotated Y-cut LiNbO3crystal used as the substrate of acoustic-surface-wave filters

    Publication Year: 1976, Page(s):595 - 597
    Cited by:  Papers (74)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (937 KB)

    The existence of a new suppression cut to the most obstructive spurious component consisting of the slower shear wave propagatating in a crystal has been experimentally found out for acousticsurface-wave propagation on LiNbO3. The plate is a 127.86° rotated Y-cut X-propagating plate and has a large electromechanical coupling coefficient. View full abstract»

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  • Surface-wave long delay lines

    Publication Year: 1976, Page(s):598 - 609
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2116 KB)

    Recent results obtained with helical surface-acoustic-wave (SAW) delay lines of large time delay and bandwidth are described. Both unguided and guided propagation are involved, with time delays up to one millisecond and bandwidths up to 65 MHz being observed. Fiber delay lines of both capillary and cladded types are also discussed. The potential for future application of SAW delay lines of large t... View full abstract»

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  • Acoustic-surface-wave disk delay lines

    Publication Year: 1976, Page(s):610 - 612
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1290 KB)

    Information can be stored serially in an acoustic beam wrapping about the closed surface of a circular thin disk. Beamguiding may be secured by exploiting a natural interaction between edge curvature and crystal anisotropy. Observations at 41 MHz, on Y-cut and ST-cut disks, demonstrate the feasibility of building isopaustic low-spurious level (57-dB) long 250-µs) disk delay lines. View full abstract»

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  • Strain effects in SAW devices

    Publication Year: 1976, Page(s):613 - 615
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (283 KB)

    An analytical model is developed to determine the velocity of surface acoustic waves in strained media. It is shown that, in addition to the variations in path length, the SAW propagation may depend significantly on the velocity change with strain. View full abstract»

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  • Waveguides for acoustic surface waves: A review

    Publication Year: 1976, Page(s):615 - 627
    Cited by:  Papers (6)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1521 KB)

    A review is presented of the current state of knowledge concerning waveguiding structures for acoustic surface waves. The stress is on the various types of waveguide and their properties, in order to provide a guide for the applications-oriented engineer. Related matters which are treated more briefly include the reasons for using waveguides, and some applications, both actual and potential. View full abstract»

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  • Applications of edge-bonded transducers to SAW components

    Publication Year: 1976, Page(s):627 - 630
    Cited by:  Papers (10)  |  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1418 KB)

    Various applications of the EBT to acoustic devices are reported. First we describe the operation of these transducers in the case of Rayleigh waves. Then we report the results we have obtained in the fabrication of: 1) a piezo-MOSFET programmable filter with a bit rate reaching 50 MHz; 2) a Love wave-dispersive delay line with a 240 compression ratio; 3) a fused silica reflective array compressor... View full abstract»

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  • Zinc-oxide thin-film surface-wave transducers

    Publication Year: 1976, Page(s):631 - 635
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2131 KB)

    The piezoelectric film layer transducer represents the most efficient method for generating and detecting surface acoustic waves on nonpiezoelectric substrates. ZnO, which has a strong piezoelectric effect and can readily be sputtered as an oriented crystalline composite on a wide variety of substrates, is a natural choice as the piezoelectric film layer. This paper summarizes a body of knowledge ... View full abstract»

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  • Radiation from a line charge source located near an air-piezoelectric interface

    Publication Year: 1976, Page(s):636 - 639
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB)

    The ray optical solution to the problem of a time harmonic line charge source radiating acoustic energy into a semi-infinite piezo-electric half space is outlined. This ray optical technique differs from the approach employed in recent publications [1], [2], and leads to a better understanding of bulk-wave radiation in SAW devices. PZT ferroceramic materials have been chosen for this study and num... View full abstract»

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  • Surface-acoustic-wave devices for signal processing applications

    Publication Year: 1976, Page(s):639 - 652
    Cited by:  Papers (47)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1492 KB)

    A survey of SAW devices is presented including delay lines, frequency filters, oscillators, matched filters, and Fourier transformers. Application of these devices to signal processing is discussed. View full abstract»

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  • Surface-acoustic-wave devices for communications

    Publication Year: 1976, Page(s):652 - 671
    Cited by:  Papers (69)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (8535 KB)

    Surface-wave components have demonstrated performance capabilities in the VHF/UHF range which are available with no other filtering technique. The major advantages of the filters are their small size, high reliability, low cost, high Q, good reproducibility, temperature stability, wide dynamic range, and linear phase response, as well as special characteristics relevant to specific applications. S... View full abstract»

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  • Case history of a surface-wave TV IF filter for color television receivers

    Publication Year: 1976, Page(s):671 - 676
    Cited by:  Papers (7)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2149 KB)

    A surface-wave filter constitutes an attractive alternative for the design of the IF section of a television receiver. The detailed requirements for the TV IF channel are set forth, followed by a comparison of the conventional design with the new design involving a surface-wave filter. The surface-wave filter is introduced by a physical description of the transducer configuration. The procedure fo... View full abstract»

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  • A television IF acoustic surface wave filter on bismuth silicon oxide

    Publication Year: 1976, Page(s):677 - 681
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1733 KB)

    A brief account is given of a television IF acoustic surface wave filter made on bismuth silicon oxide. The potential advantages of this substrate material are pointed out, the filter design techniques used are explained, and the device construction is described. Measured responses of filters for two television systems are given. View full abstract»

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  • Design and applications of two-port SAW resonators on YZ-lithium niobate

    Publication Year: 1976, Page(s):682 - 685
    Cited by:  Papers (7)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (393 KB)

    The fundamental design criteria for two-port SAW resonators are discussed. The distributed reflective arrays are modeled as lossy repetitively mismatched transmission lines with impedance mismatch ε and expressions for the reflection magnitude and phase are given. An experimental technique is described to directly determine both ε and the proper placement of the input/output transducers.... View full abstract»

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  • Narrow-band filters employing surface-acoustic-wave resonators

    Publication Year: 1976, Page(s):685 - 687
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2715 KB)

    It is possible to utilize a surface-acoustic-wave (SAW) interdigital transducer (IDT) with a large number of electrodes as a resonator-a SAW resonator. Band-elimination filters and bandpass filters with a narrow bandwidth have been developed employing SAW resonators. View full abstract»

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  • Surface-acoustic-wave multiplexing techniques

    Publication Year: 1976, Page(s):688 - 691
    Cited by:  Papers (7)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2291 KB)

    Two approaches to frequency division multiplexing using SAW devices are described. The first one uses a 9-channel filter array, where the signal combining and splitting is performed using wide-band power splitters. Two of these filter arrays were used in a data link, with data rates up to 7.5 Mbit/s for a total data rate of 67.5 Mbit/s. The second approach uses offset multistrip couplers to channe... View full abstract»

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  • A circuit approach to SAW filterbanks for frequency synthesis

    Publication Year: 1976, Page(s):692 - 695
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (992 KB)

    A SAW filterbank (2.5 × 0.9 cm) coupled to a miniature silicon-on-sapphire (SOS) p-i-n diode, multiple-input single-output RF switch array (2.5 × 0.25 cm) forms the basis of a very compact UHF frequency synthesizer. In this paper the operation, design, fabrication, and performance of rapid-switching SAW frequency synthesizers is described. Experimental measurements depicting the spectral... View full abstract»

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  • SAW chirp filter performance above 1 GHz

    Publication Year: 1976, Page(s):695 - 698
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (635 KB)

    The performance of a practical compact SAW dispersive filter with a bandwidth in excess of 500 MHz and centered at 1.3 GHz is described. The linear FM chirp filter was fabricated and serially reproduced by electron-beam microfabrication. The effect of an externally implemented weighting function on the time domain performance is discussed. The filter has been found suitable for pulse compression i... View full abstract»

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  • Spurious acoustic responses in SAW devices

    Publication Year: 1976, Page(s):699 - 702
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1866 KB)

    Substantial documentation of the character of spurious responses in SAW devices has shown that they can be completely characterized as families of plate modes when the substrates have parallel top and bottom surfaces. Presented here are theoretical plate mode calculations and the corresponding experimental results for commonly used substrate orientations. It is shown that quantitative terminal res... View full abstract»

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  • Properties and applications of reflective-array devices

    Publication Year: 1976, Page(s):702 - 710
    Cited by:  Papers (63)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1114 KB)

    The use of reflective arrays in surface-wave devices has yielded new devices such as resonators in addition to an enlarged parameter range for devices such as radar pulse expanders and compressors. A number of different grating geometries, substrates, and types of reflectors have been employed in resonators, band-pass filters, filter banks, oscillators, and dispersive delay lines. Simple, yet accu... View full abstract»

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  • Surface-acoustic-wave resonators

    Publication Year: 1976, Page(s):711 - 721
    Cited by:  Papers (75)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1890 KB)

    The surface-acoustic-wave (SAW) resonator is the surface-wave equivalent of the crystal resonator now used extensively for stable frequency sources and filters. High-Q operation above 30 MHz, ruggedness, and small size characterize these devices. This paper reviews the current status of SAW resonator developments for the benefit of readers with interest or experience in either crystal resonators o... View full abstract»

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  • Frequency synthesis via the discrete chirp and prime sequence ROM's

    Publication Year: 1976, Page(s):721 - 723
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (782 KB)

    Surface-acoustic-wave (SAW) sampled-data filters can be utilized as serial access READ-ONLY memories to directly implement at carrier frequencies a coherent fast-frequency-hop synthesizer in the VHF and UHF ranges. An example of frequency synthesis using surface acoustic wave discrete chirp filters is shown. A frequency synthesis scheme using a SAW prime-sequence filter is described. View full abstract»

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  • Acoustoelectric interactions in acoustic-surface-wave devices

    Publication Year: 1976, Page(s):724 - 748
    Cited by:  Papers (79)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3268 KB)

    The principles of a wide range of acoustic-surface-wave devices employing acoustoelectric interactions with semiconductors are described. It is shown that acoustoelectric amplifiers can increase the dynamic range of a delay-line filter. Such devices have been operated on a CW basis and are beginning to become practical. The acoustic convolver and its derivative devices, the optical scanner, the ac... View full abstract»

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North Carolina State University