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Didactional Multifunction Radar DMR “Scientific Radar”

Description of the radar set, tactical-technical characteristics Описание; Основные тактико-технические характеристики (Базы данных)

Figure 1: Scientific Radar - Didactional multifunction radar, K-Band- version

Figure 1: Scientific Radar - Didactional multifunction radar, K-Band- version

Specifications
frequency: S, C oder K-Band
average power: 4 mW
instrumented range: > 20 m
range resolution:  
accuracy:  
beamwidth:  
MTBCF:  
MTTR:  

Didactional Multifunction Radar DMR “Scientific Radar”

The Didactional Multifunction Radar DMR is constructed as a special didactical radar for vocational training, specially adapted to the particular client requirement and the desired training topics. Practically every device is unique because it is built from a wide variety of modular sub-devices, adapted to the requirements of the training topics. It operates as desired in the frequency range S-Band, C-Band and X-Band, some features may be extended to the K-Band. For the construction will be partly used original radar modules made by leading manufacturers, as well as lower-priced standard commercial components for communications technology.

The following modes as LPI radar (low probability of intercept radar) may be selected:

  1. Pulsed radar (intrapulse modulated, as well as classic short keyed on/off pulses), shortest pulse: 25 ns, longest pulse… yeah …up to CW- or FMCW-Radar;
  2. pure unmodulated CW radar (however, this is only useful with a stationary antenna)
  3. following modes as FMCW radar are possible:
    • FMCW-Radar with classic sawtooth- or triangle shaped frequency shift (Chirp-radar);
    • FSK-FMCW (frequency shift keying FMCW);
    • SFMCW (stepped frequency modulated CW) for interferometric measurements;
    • FMiCW (Interrupted FMCW) for better isolation between transmitter and receiver
    • PMCW (phase modulated CW) with pseudorandom codes.

Core of this radar is a freely programmable synthesizer for the transmit signal, which is based on a fast microprocessor. With a clock speed of 40 MHz, it has a temporal resolution of a minimum of 25 nanoseconds and an accuracy in the range of less than 4 nanoseconds. Using this module, all necessary for the operation of a radar trigger pulses and switching gate signals are provided. The good temporal resolution and free programming option also allows direct control of a phase modulator. At the same time can be provided two analog control voltages in any form with the same resolution and accuracy and a maximum cycle time of more than 8 milliseconds. These can control either a voltage controlled oscillator (VCO) for an FMCW radar, or may be used directly as input voltages (sine and cosine) for the modulator of an intra-pulse modulated pulse radar. It can be designed practically arbitrary radars with this programmable synthesizer.

But for mechanical reasons and resulting physical laws, this radar is not suitable to represent a target tracking radar. Also an use as SAR is not possible. Only at a later stage of development of software, it would be possible to implement an ISAR function, whose hardware-related conditions are already given.

Each device is supplied with a customized training material. This home page provides a little insight for its quality and scope here. Prepared training materials provide students to develop a practice in many areas in radar technology based on devision of own experiences. Likewise, the teacher has access to a variety of good graphics and animations for his seminars, which are confirmed by practical measurements.