NDLI: The Role of Acoustic Surface Waves in Signal Processing

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[Front cover, 1971 IEEE-GMTT International Microwave Symposium]

Session 1 - Filters and Couplers [breaker page]

Technique for the Realization of Optimum Bandpass Filters

A Graphical Method for the Design of Stepped Impedance Transformers

Microwave, Doppler Invariant, Pulse Compression Filters

The Virtues of Mixing Tandem and Cascade Coupler Connections

Multi-Port Lattice-Type Hybrid Network

Design of Hairpin-Line and Hybrid Hairpin-Parallel-Coupled-Line Filters

Session II - Applications of Microwave Integrated Circuits [breaker page]

An Integrated, X-Band, Image and Sum Frequency Enhanced Mixer with 1 GHz IF

Integrated Mixer for 18 and 26 GHz

A 90 DB Microstrip Switch on a Plastic Substrate

Miniature Multi-Kilowatt PIN Diode Mic Digital Phase Shifters

Electronically Tuned Integrated X-Band Superheterodyne Receiver

Alumina Sandwich Line Filters for High Performance Integrated Circuit Application

Session III - Transmission Lines and Measurements [breaker page]

Fence Guide for Millimeter Waves

Propagation in a Shielded Microslot with a Ferrite Substrate

The Ring-Loaded Corrugated Waveguide

Errors in S/sub 11/ Measurements Due to Residual SWR of the Measuring Equipment

MIC Techniques in the Design of Extremely Broadband Reflectometers

Characterization of Packaged Varactor Diodes

Impedance Measurement of a Waveguide Mount

Session IV - Microwave Acoustics [breaker page]

The Role of Acoustic Surface Waves in Signal Processing

Design Data for Microwave Acoustic Surface Wave Devices

Properties and Applications of the Acoustic Wave Junction Between Plated and Unplated Substrates

An Electronically Variable Surface Acoustic Wave Phase Shifter

Modified Equivalent Circuit Model for Ultrasonic Surface Wave Interdigital Transducers

Acoustic Surface Wave Sequence Generators and Matched Filters with Adjustable Taps

Wideband Microwave Acoustic Delay Line with Exceptionally Smooth Phase and Loss Response

Session V - Ferrite Materials and Circulators [breaker page]

Ferrite-Eielectric Composite Integrated Microwave Circuit Development

Effect of Rare-Earth Impurities on the Peak Power Capability of Garnet Type Low-Field Microwave Devices

Lithium Ferrites for Microwave Devices

Review of Circulator Technology

Stepped Ground Plane Circulator

A New Concept for Broadbanding the Ferrite Substrate Circulator Based on Experimental Modal Analysis

Theoretical and Practical Characteristics of a Broad Tuning Range Y. I.G. Sphere Circulator

Session VI - Avalanche Diodes [breaker page]

High-Power, Low-Noise Avalanche Diode Oscillators

Distributed Unidirectional Microwave Amplification

High-Power Microwave Amplifier Using Anti-Parallel Avalanche-Diode Pair

Second Harmonic Tuning Effects on IMPATT Diode Oscillator Noise Characteristics

Reduction of FM Noise in Microwave Diode Oscillators by Cavity and Injection Stabilization

A Cascaded-Impedance-Inverter Model of Wide-Band Frequency Triplers

Session VII - Ferrite Limiters and Phase Shifters [breaker page]

Microwave Properties of Partially Magnetized Ferrites

A New Reciprocal Phaser for Use at Millimeter Wavelengths

An Accurate Analog Ferrite Phase Shifter

The Application of Periodic Loading to Ferrite Phase Shifter Design

Ferrite Phase Shifters and Multi-Port Circulators in Microstrip and Stripline

A 100-Kilowatt X-Band Ferrite-Diode Limiter

X and Ku-Band Ferrite-Diode Limiters

Session VllI - Computer Oriented Microwave Practices [breaker page]

The Application of the Theory of Equivalent Circuits to the Computer-Aided Design of Microwave Circuits

Gradient Razor Search Method for Optimization

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Working With Automatic Microwave Circuit Analysis Programs

Coiwputer-Aided Determination of Equivalent Circuits for Waveguide Discontinuities

Computer-Aided Design of Parametric Amplifiers

Finite Element Techniques for the Solution of Poisson's Equation

Session IX - Student Paper [breaker page]

Generation of Confined Spectrum Pulses Using an Absorption PIN Diode Modulator

Session X - Microwave Applications for the 70's [breaker page]

Channel Multiplexer for a Millimeter Waveguide Transmission System

State of Art in Microwave Sensors for Measuring Nonelectrical Quantities

Status of the Technology and Applications of Free-Space Microwave Power Transmission

Microwave Ice Thickness Sensor

Session Xl - Gunn Devices [breaker page]

Gunn Diode Impedance Measurements Using a Single-Tuned Oscillator

Experimental and Computer Simulation Analysis of a Gunn Diode

Gunn Effect Wide Band CW Waveguide Amplifier

Multi-Parallel Operation of Gunn Diodes for High RF Power

New Alarm Circuit Used for Injection Locking Oscillator of Microwave Communication Equipment

Session XII - Civil RADAR Systems [breaker page]

Microwave Applications to Transportation

Application of Radar to Automobile Control and Sensing

Automobile RADAR

A Doppler RADAR Using a Gunn Diode Both as a Transmitter Oscillator and a Receiver Mixer

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Session XIII - Solid State Microwave Devices [breaker page]

Broadband Diode Phase Shifters

Octave Ban D MIC Electronically Variable Attenuators Using PIN Diodes

Negative-Impedance Converters (NIC) for VHF Through Microwave Circuit Applications

Gigahertz Rate Counter Logic and Clock Generation Using High F/sub T/ Transistors

Microwave Integrated Tunnel Diode Amplifiers for Broadband, High Performance Receivers

A Mixer and Solid State L.O. for a 60 GHz Receiver

Variable-Permittivity Artificial Dielectrics

Late News Papers (Session X) and (Session XI)

Announcement for the 1972 International GMTT Symposium

Microwave Prize Recipients and New Fellows, 1971 IEEE-GMTT International Microwave Symposium

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Membership Application, 1971 IEEE-GMTT International Microwave Symposium

Index, 1971 IEEE-GMTT International Microwave Symposium

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G-MTT 1970 International Microwave Symposium

1969 G-MTT International Microwave Symposium

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1967 G-MTT International Microwave Symposium Digest

The Role of Acoustic Surface Waves in Signal Processing

Content Provider	IEEE Xplore Digital Library
Author	Stern, E. Taylor, J.O.
Copyright Year	1971
Abstract	On Fig. 1 is shown an actual plot of wavecrests on the surface of crystal. Notice that these wavecrests are not regular, they appear to be relatively flat within the beam then they appear to fall back rapidly away from the beam center. That is because lithium niobate crystal is highly anisotropic, and the waves moving slightly off the beam direction tend to move more slowly than waves directly on the beam direction. The straight-crested surface wave is generated on lithium niobate with a transducer shown in Fig. 2. The position of the fingers in the transducer matches the position of the crests and troughs of Fig. 1, and if an electrical signal at the appropriate frequency is applied to the transducer then a surface acoustic wave beam radiates from these transducers. The transducer is relatively efficient--a bit less than half the available electrical energy is put into the desired acoustic wave with this particular design.
Starting Page	48
Ending Page	49
File Size	515598
Page Count	2
File Format	PDF
DOI	10.1109/GMTT.1971.1122897
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1971-05-16
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Surface acoustic waves Acoustic signal processing Acoustic waves Acoustic transducers Acoustic beams Frequency Electrostatics Acoustic devices Lithium niobate Switches
Content Type	Text
Resource Type	Article

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