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Results of signal peculiarities' investigation of an autodyne short-range radar system with linear frequency modulation for the moving reflecting object are considered. The autodyne signal plots are obtained for the cases when its period duration is much longer than delay time of the reflected emission as well as for the cases when this inequality is not satisfied. Experimental data are obtained on...
Data of the experimental studies of an energy potential and dynamic range of the normal and frequency stabilized by the external high-Q resonator autodynes based on planar 8-mm Gunn diodes are provided.
Options and application opportunities of double-diode autodynes in microwave sensors are considered to radio-wave control dimensions of products, vibration and displacement parameters, velocity and movement direction of reflecting objects.
Operation principle, adjustment approach and construction description are given for double-diode autodyne module of 8mm-range made on the base of two mutually-synchronized partial oscillators on Gunn diodes. The block-diagram of a workbench is presented for determination of the motion speed and direction, vibration parameters and displacements of reflecting objects with the help of double-diode autodynes.
The paper presents the results of the development the phase detectors for 2-millimeter two-frequency interferometer. Proposed circuit solutions allow eliminating the ambiguity of phase measurements when using the AD8302 chip and measuring the fast phase changes within 0–3600, and relative phase measurements in the range N∗2π, (where N < 66). The phase detectors have been tested in the heterodyne...
Radar sensor for use in automatic shunting system which executes remote control of track occupancy on hump yards and railroad switches and cut speed control passing along retarder position is developed. The sensors are equipped by systems of remote control and internal parameters diagnostics transmitting the radar and service information to the control point. The sensors could be applicable for use...
The principals of range resolution improvement the self-mixing FMCW radar based on analysis of the spectrum of high-order harmonics of intermediate frequency is proposed. Developed the scheme and investigated the model of Ka-band surveillance self-mixing FMCW radar with digital control and spectral processing of receiving signal. Advantages of this radar are small size, low power consumption and use...
The design concept of F-band heterodyne vector network analyzer is considered in this paper. The description of the flow chart, the main parameters and the results of tests of breadboard model are given.
The paper describes the peculiarities of the technical solutions, operation characteristics and results of the field tests of a prototype of the semiconductor Ka-band radar sensor with a coherent signal processing designed to be used as a part of the surface monitoring system at airports. The prototype have been developed, fabricated and tested by IRE NASU (Kharkov, Ukraine) and OJSC SPE «Saturn»...
The results of development of low cost radar sensors for remote control of track occupancy and railway cars speed over the territory of hump yards under heavy weather conditions are presented. The radar sensor feature is application of Ka-band FMCW autodyne (self-mixing) transmitter and digital systems for forming sounding signal and spectral processing of received signals. Sensor is equipped with...
The principals of range resolution improvement the self-mixing (autodyne) surveillance radar for object detection on distances from ones to hundred meters are considered in this paper. The description of the flow chart, main parameters and results of test bed model examination are given. Application of the self-mixing regime with internal detection allowed to make the construction easier dimensions...
Algorithms for the suppression of noise and detection of a pulse signal in both time and spectral areas stipulate the use of an analog-to-digital converter with a high resolution, allowing us to cover the dynamic range the signal and noise. The system operation is demonstrated by the example of recording natural electromagnetic signals excited in a space between the Earth and ionosphere in urban conditions...
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