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Home » Unmanned System Products » MAST-09 Radio Altimeter Detection Unit
MASS-21 Echo Simulator of Radio Altimeter
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MAST-11 Equivalent Altitude Simulator of Radio Altimeter

MAST-09 Radio Altimeter Detection Unit

The MAST-09 Radio Altimeter Detection Unit is a compact, aerospace-grade component that monitors, validates, and processes radio altimeter data for aircraft. It filters interference, cross-references data with other flight sensors, and detects faults (e.g., signal loss, calibration drift) to deliver reliable terrain-relative altitude info—critical for safe takeoff, low-altitude flight, approach, and landing, even in low visibility. Built to meet strict aerospace standards (e.g., DO-160, DO-178), it withstands extreme environmental conditions, suiting commercial and military aircraft.

Categories: Atmospheric Treatment, Data Communication, Partsassembly, Radar Detection, Scene Simulation
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  • Description
Description

Product Description

  • Working center frequency: 4.3GHz;
  • Maximum allowable bandwidth: 200MHz;
  • Maximum allowable input power: 25dBm;
  • Simulation height: 3M, 5m, 7m, 10m, 20m, 50m, 100m, 300m, 520m;
  • Simulation height accuracy: ≤ 0.2m (10m and below) or 1% HM (20m and above);
  • Fixed attenuation of circuit: 40dB;
  • Loop adjustable attenuation (including fixed attenuation): 40 ~ 120dB;
  • Adjustable attenuation precision: 2dB;
  • Adjustable attenuation step: 1dB;
  • Height switching time: no more than 1ms;
  • In band fluctuation: ±3dB;
  • Spurious suppression: not less than 60dB;
  • Control mode: local, network port, serial port control;
  • Isolation: ISO>60dB;
  • Volume and weight: 450×430×170 mm, no more than 20kg;
  • Working voltage: 220±15%V;
  • Working temperature: 0~55℃;
  • Storage temperature: – 30~55℃.

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Subminiature Radio Altimeter MY-70B

The MY-70B radio altimeter is a solid-state C-band radio altimeter system based on frequency-modulated continuous wave (FMCW) technology, characterized by constant beat frequency and closed-loop tracking measurement. It maintains a constant beat frequency by servo-controlling the slope of the sawtooth wave that modulates the microwave oscillator, thereby achieving automatic altitude tracking. Under the condition of constant beat frequency, the measured altitude is proportional to the modulation period; thus, altitude information can be obtained by measuring the modulation period, and the system then converts this information into an altitude voltage for output. The MY-70B altimeter possesses excellent anti-jamming performance, owing to its adoption of a narrow-band receiver (with gain adjustable according to altitude) as well as technologies including equivalent spectrum front-end detection, weighted frequency identification, and automatic servo tracking. In terms of component design, its high-frequency components implement microwave integration while its low-frequency components adopt a modular design—these measures collectively enhance the product’s reliability, anti-interference capability, and electromagnetic compatibility. Additionally, the MY-70B altimeter uses RS422 and CAN protocols for its interface output, which further improves the reliability of the product’s data transmission.

MDG-400 Radio Altimeter

The MDG-400 radio altimeter operates in the C-band and adopts a frequency-modulated continuous wave (FMCW) working system, with its antenna utilizing a transmit-receive separation mode. Prior to missile launch, the altimeter (serving as the height-fixing device) is powered on, and it undergoes self-check and height presetting via the communication interface. After the missile is launched, the radio frequency (RF) module is activated, and frequency variation parameters are set based on the preset height. When the preset height is achieved, the altimeter outputs height-fixing command information and telemetry data. The MDG-400 altimeter features mature technology; its adoption of frequency-modulated continuous wave (FMCW) technology endows it with the advantages of compact size and a large height measurement range.

MDY-01 Radar Seeker

A radar seeker is a radar device installed on missiles, primarily used for target detection and tracking. It provides target position and motion parameters to the missile’s control system, thereby guiding the missile to fly toward the target. The MDY-01 radar seeker is characterized by high measurement accuracy, strong environmental adaptability, and high reliability.

MASS-10 Universal Echo Precision Delay Module (Miniature Universal Continuous Simulation)

The MASS-10 Universal Echo Precision Delay Module, featuring a miniature design and universal continuous simulation capability, is a high-performance component tailored for precise echo signal delay control in radio frequency (RF) testing scenarios. It excels in providing accurate, adjustable delay for echo signals across a wide range of frequencies, making it applicable to various devices like radio altimeters, radars, and other RF-based systems that require reliable echo signal simulation. With its compact size, the module is easy to integrate into limited-space test setups, while the universal continuous simulation function ensures it can replicate diverse real-world signal delay conditions consistently. This module plays a crucial role in verifying the performance of target devices—such as testing their ability to accurately capture and process delayed echo signals—thereby supporting the development, calibration, and quality assurance of RF equipment with high precision and flexibility.

Small Radio Altimeter MY-28A、MY-24(XXX-28A、XXX-24)

The MY-28A and MY-24 (also designated as XXX-28A and XXX-24) are miniaturized C-band full-function radio altimeters that comply with aerospace standards. Serving as key components for the control of the longitudinal altitude channel, they are specifically designed for a certain type of UAV target. These altimeters possess excellent anti-interference performance and electromagnetic compatibility, enabling them to accurately measure altitude relative to the sea surface or the ground.
The MY-28A and MY-24 are developed following the three core design principles of serialization, standardization, and modularization. This design approach endows the products with strong design inheritance, ensuring they are mature and reliable in operation. To date, these two models of radio altimeters have been widely applied in multiple types of aircraft, with their total deployment quantity exceeding 800 units.

MASS-21 Echo Simulator of Radio Altimeter

​The MASS-21 Radio Altimeter Echo Simulator is capable of simulating both static and dynamic echo signals of altimeters under a variety of altitude conditions and reflection coefficient scenarios. It is compatible with radio altimeters of multiple systems, including frequency modulation (FM) systems, phase modulation (PM) systems, and pulse systems, and is also equipped with a built-in self-check function to ensure its own operational reliability during use.

Subminiature Radio Altimeter MY-70A

The MY-70A radio altimeter is a solid-state C-band radio altimeter system based on frequency-modulated continuous wave (FMCW) technology, featuring constant beat frequency and closed-loop tracking measurement. It maintains a constant beat frequency by servo-controlling the slope of the sawtooth wave that modulates the microwave oscillator, thereby achieving automatic altitude tracking. Under the condition of a constant beat frequency, the measured altitude is proportional to the modulation period; thus, altitude information can be acquired by measuring the modulation period, and the system then converts this information into an altitude voltage for output. The MY-70A altimeter boasts excellent anti-jamming performance, thanks to its adoption of a narrow-band receiver (with gain adjustable according to altitude), as well as technologies including equivalent spectrum front-end detection, weighted frequency identification, and automatic servo tracking. Additionally, the altimeter’s high-frequency components are implemented with microwave integration, while its low-frequency components utilize a modular design—these measures collectively enhance the product’s reliability, anti-interference capability, and electromagnetic compatibility.

MASS-18 Universal Echo Precision Delay Module (Miniature Universal Continuous Simulation)

The MASS-18 Universal Echo Precision Delay Module, characterized by its miniature design and universal continuous simulation capability, is a high-precision component engineered for precise echo signal delay adjustment in radio frequency (RF) testing scenarios. It specializes in delivering accurate, customizable delay for echo signals across a broad frequency range, making it compatible with diverse RF devices—including radio altimeters, surveillance radars, and communication systems—that require reliable echo signal simulation. Its compact form factor allows easy integration into space-constrained test setups, while the universal continuous simulation function ensures consistent replication of real-world signal delay conditions (such as those caused by varying altitudes or distances). By enabling precise control over echo delay, the module plays a critical role in verifying key performance metrics of target devices, such as signal capture accuracy, delay response, and data processing reliability, thereby supporting the development, calibration, and quality assurance of high-performance RF equipment with flexibility and precision.​

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