Monolithic SAW Research Articles

The numerical simulation of the extraction of ion beams from plasma and their dynamics in ionic-optical systems: AF Stekolnikov and OM Ivanov, Minsk Radioengineering Institute, P. Brovka 6, Minsk 220600, USSR

This chapter focuses on real-time SAW convolvers for programmable matched filtering, such as in spread-spectrum communications. This chapter examines three types of real-time convolvers. The first of these is the three-port monolithic waveguide SAW convolver, whose operation is based on acoustic interactions on the surface of the piezoelectric substrate. This type is currently leading the three-port SAW convolver field in applications calling for bandwidths of 100 megahertz or less. The other two real-time SAW convolvers incorporate a silicon semiconductor in close proximity to a lithium niobate substrate such that their operation is dependent on the acoustoelectric interactions of SAW-induced electric fields at the silicon surface. In the order of evolution, these last two are the three-port SAW/ silicon convolver and the more intricate four-port SAW/silicon convolver. This four-port structure finds application in wide-band radar and spread-spectrum communications, such as for packet radio applications. The choice of whether to use a SAW convolver or a linear SAW filter for matched filtering depends on a number of factors. On the credit side, the SAW convolver can provide for a fixed or programmable matched filtering of lengthy coded sequences, well beyond the present range of fixed or programmable transversal SAW filters.

Large-Scale Monolithic SAW Convolver/Correlator on Silicon

Large-Scale Monolithic SAW Convolver/Correlator on Silicon

Effect of additional heavy metal layer on ZnO-Si monolithic SAW devices

Enhancement of electromechanical coupling has been shown in numerical calculations with an additional massive and conducting layer, such as Au, which makes the velocity of SAW slow between a ZnO thin film and an Si substrate. It is also shown that the electromechanical coupling factor can be increased without deterioration of the temperature coefficient of phase velocity.

Voltage Controlled Monolithic SAW Phase Shifter and Its Application to Frequency Variable Oscillator

Voltage Controlled Monolithic SAW Phase Shifter and Its Application to Frequency Variable Oscillator

Frequency Variable Oscillator Using a Monolithic SAW Phase Shifter

A new frequency variable oscillator with a monolithic SAW phase shifter is reported. A 214 MHz monolithic SAW phase shifter is fabricated on a silicon substrate with ZnO film. A voltage controlled phase shift is measured and discussed. An SAW oscillator is implemented with this phase shifter and its frequency is controlled by external voltage. A frequency shift of 120 kHz (a relative variation of 560 ppm) and excellent modulation characteristics are obtained without an external phase shifter.

Characteristics of ZnO/Si Monolithic SAW Convolver with MIS-Transistor Structure

The characteristics of the ZnO/Si monolithic SAW convolver with MIS-Transistor structure have been investigated. The convolution output of the present convolver is controlled by the combination of the dc junction bias and the dc gate bias. It has been found that the nonlinearity caused by the carrier flow in the surface channel can be used to generate convolution output when all the junctions are biased with the same voltage. When the junctions are biased in the same way as in a MIS Transistor, the quadratic characteristics of the drain saturation current vs. the gate bias give rise to effective convolution output.

Separation of storage effects in monolithic p n diode correlators

The use of a combination of steady and pulsed dc biasing of a ZnO monolithic SAW device enabled a distinction to be made between surface-state and pn diode storage mechanisms in a single memory correlator device. By use of demonstrated biasing schemes, storage times of from tens of microseconds to tens of miliseconds are available in a single device.

Nuclear radiation effects on surface acoustic wave devices

A comprehensive summary of the effects of pulsed ionizing radiation on the operation of several types of passive surface acoustic wave devices is presented. Three distinct types of malfunction were observed and are discussed in detail. In addition, the effects of neutron and 60Co gamma permanent displacement damage on the operation of a monolithic SAW amplifier are presented.

Microstructure detection with the aid of ultrasound: Wegel, G. Feingeräte-Technik Vol 20 No 12 (December 1971) pp 563–566 (In German)

This chapter focuses on real-time SAW convolvers for programmable matched filtering, such as in spread-spectrum communications. This chapter examines three types of real-time convolvers. The first of these is the three-port monolithic waveguide SAW convolver, whose operation is based on acoustic interactions on the surface of the piezoelectric substrate. This type is currently leading the three-port SAW convolver field in applications calling for bandwidths of 100 megahertz or less. The other two real-time SAW convolvers incorporate a silicon semiconductor in close proximity to a lithium niobate substrate such that their operation is dependent on the acoustoelectric interactions of SAW-induced electric fields at the silicon surface. In the order of evolution, these last two are the three-port SAW/ silicon convolver and the more intricate four-port SAW/silicon convolver. This four-port structure finds application in wide-band radar and spread-spectrum communications, such as for packet radio applications. The choice of whether to use a SAW convolver or a linear SAW filter for matched filtering depends on a number of factors. On the credit side, the SAW convolver can provide for a fixed or programmable matched filtering of lengthy coded sequences, well beyond the present range of fixed or programmable transversal SAW filters.

Improved depthfinder display presentation by use of MSI: Brede, R. Electroteknisk Tidsskrift Vol 84 No 20 (November 1971) pp 19–20 (In Norwegian)

This chapter focuses on real-time SAW convolvers for programmable matched filtering, such as in spread-spectrum communications. This chapter examines three types of real-time convolvers. The first of these is the three-port monolithic waveguide SAW convolver, whose operation is based on acoustic interactions on the surface of the piezoelectric substrate. This type is currently leading the three-port SAW convolver field in applications calling for bandwidths of 100 megahertz or less. The other two real-time SAW convolvers incorporate a silicon semiconductor in close proximity to a lithium niobate substrate such that their operation is dependent on the acoustoelectric interactions of SAW-induced electric fields at the silicon surface. In the order of evolution, these last two are the three-port SAW/ silicon convolver and the more intricate four-port SAW/silicon convolver. This four-port structure finds application in wide-band radar and spread-spectrum communications, such as for packet radio applications. The choice of whether to use a SAW convolver or a linear SAW filter for matched filtering depends on a number of factors. On the credit side, the SAW convolver can provide for a fixed or programmable matched filtering of lengthy coded sequences, well beyond the present range of fixed or programmable transversal SAW filters.