MTA Radar stands for Moving Target Indicator Radar.
Used to identify moving targets among stationary objects (clutter).
Works by utilizing pulse transmitters for detecting moving targets.
Types of MTA Radar
MTA Radar with Power Amplifier Transmitter
Amplifies the transmitted signal before sending.
Example: Klystron amplifiers used.
MTA Radar with Power Oscillator Transmitter
Generates signals using high power oscillators.
Example: Magnetron oscillators.
Basic Concepts
Both MTA Radar and Pulse Doppler Radar identify moving targets in clutter.
Pulse Modulation: Both systems transmit pulse-modulated signals.
Mixer Function: The receiver mixes the received signal with the transmitted signal to detect Doppler frequency shifts.
Block Diagram Components for MTA Radar with Power Amplifier Transmitter
Transmitter Section
Composed of various components, including:
Stable Local Oscillator (STALLO): Generates a frequency (FL).
Coherent Oscillator (COHO): Provides a coherent signal for mixing and modulation.
Power Amplifier: Amplifies the modulated signal for transmission.
Receiver Section
Similar components to the transmitter, includes:
Mixer: Combines signals to determine frequency shift.
IF Amplifier: Amplifies the intermediate frequency component.
Phase Detector: Detects the Doppler frequency.
Key Functions
Duplexer: Separates transmitting and receiving signals when using a single antenna.
Delay Line Canceler: Converts AC signals to DC for display on the PPI (Plan Position Indicator).
Helps eliminate stationary target signals from moving target signals.
Converts bipolar video patterns into unipolar for easier display.
Important Points
Coherent Signaling: Ensures transmitted and received signals are in phase, allowing for accurate Doppler shift detection.
PPI Display: Displays target positions as blips instead of waveforms, requiring conversion from bipolar to unipolar formats.
The output of the radar system can be affected by clutter and stationary targets, requiring sophisticated signal processing to isolate moving targets.
Conclusion
MTA Radar with Power Amplifier Transmitter is designed for effective target detection in various environments, particularly in the presence of clutter. Understanding its components and functions is crucial for effective operation.