Abstract
The results of research into the dynamic characteristics of microwave oscillators under the influence of both their own reflected radiation and external synchronising effect are presented. The basic relations for the analysis of signals during fast movement of the target are obtained, when the signal period is comparable to the autodyne response time constants. The results of numerical modelling of the characteristics are confirmed by the experimental data obtained on the example of an oscillator based on the Gunn diode of the 8-mm range.
Highlights
For the successful use of autodyne (AD) in various applications, knowledge about their dynamic characteristics is required, which should be taken into account in registering the parameters of various targets movement [1,2,3,4,5,6]
It has been established that their amplitude-frequency characteristic (AFC) width is largely dependent on the time constant of the autodyne response a to a change in the oscillation amplitude which introduces a limitation on the maximum target velocity recorded by AD
The aim of this work is to study the AFC transmission coefficients of the autodyne response by changing the amplitude and phase of the synchronised AD (SAD) oscillations depending on the speed of the location object by taking into account the internal parameters of the microwave oscillator and its synchronisation conditions
Summary
For the successful use of autodyne (AD) in various applications, knowledge about their dynamic characteristics is required, which should be taken into account in registering the parameters of various targets movement [1,2,3,4,5,6]. It has been established that their AFC width is largely dependent on the time constant of the autodyne response a to a change in the oscillation amplitude which introduces a limitation on the maximum target velocity recorded by AD. In the synchronised AD (SAD), which is of practical interest, the results of studies of dynamic characteristics in the published literature [5] are unknown. In this regard, the aim of this work is to study the AFC transmission coefficients of the autodyne response by changing the amplitude and phase of the SAD oscillations depending on the speed of the location object by taking into account the internal parameters of the microwave oscillator and its synchronisation conditions
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