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Home » Unmanned System Products » MASS-06 Continuous Echo Simulation Excitation System of Radio Altimeter
MASS-03 Radio Altimeter Continuous Echo Signal Simulator
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MASS-10 Universal Echo Precision Delay Module (Miniature Universal Continuous Simulation)

MASS-06 Continuous Echo Simulation Excitation System of Radio Altimeter

The MASS-06 Echo Signal Simulation Excitation System, hereinafter referred to as the “Simulation Excitation Source”, is a dedicated equipment designed for the hardware-in-the-loop (HIL) simulation of radio altimeters. It serves as a key component in replicating real-world echo signal scenarios, providing targeted excitation signals that enable the radio altimeter to operate under simulated physical conditions—effectively bridging the gap between theoretical testing and actual operational environments to validate the altimeter’s performance, responsiveness, and reliability.

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: 36dbm;
  • Height range: 1-8000m (continuous);
  • Height resolution: 0.5m;
  • Height accuracy: ± (0.2 + 0.005 × h);
  • Correction accuracy after simulated altitude measurement: ± (0.2 + 0.001 × h) m;
  • Height change speed: – 500~500m/S;
  • Height switching time: no more than 1ms;
  • In band fluctuation: no more than 3dB;
  • Maximum attenuation of circuit: not less than 150db (high altitude);
  • Minimum attenuation of loop: no more than 40dB (low altitude);
  • Dynamic range of loop attenuation: not less than 80dB;
  • Dynamic range of loop attenuation: not less than 80dB;
  • Delay line through rejection: not less than 45dB;
  • Pass through rejection of transceiver port: not less than 90dB;
  • Multiple stroke suppression: not less than 45dB;
  • Spurious suppression: not less than 80dB;
  • Phase noise: no more than 80dbc/Hz@1kHz;
  • Control mode: RS422 serial port control;
  • Working temperature: 0 ~ 40 ℃;
  • Storage temperature: – 40 ~ 60 ℃;
  • Working power supply: AC/50Hz/220V, or DC24-36V; power consumption not more than 60W;
  • Volume:433mm×380mm×87mm.

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MAST-11 Equivalent Altitude Simulator of Radio Altimeter

The MAST-11 Equivalent Altitude Simulator of Radio Altimeter is a specialized aerospace testing tool engineered to replicate realistic altitude signals for radio altimeter systems. It generates precise, adjustable equivalent altitude data—mimicking terrain-relative height scenarios—to validate the performance, accuracy, and fault response of on-board radio altimeters during pre-flight testing, maintenance, or system calibration. Compliant with stringent aerospace standards, it ensures reliable simulation of low-to-high altitude ranges, supports interference-free signal output, and integrates easily with aircraft test setups, making it essential for verifying radio altimeter functionality across commercial and military aircraft platforms.

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.​

MDY-71/74 Millimeter Wave Guidance Radar

The MDY-71/74 demonstration radar is a compact millimeter-wave coherent guidance radar that utilizes a phase difference system. It boasts key features including low cost, low power consumption, and high reliability, enabling it to detect and track targets—such as vehicles and vessels—within its beam coverage. Additionally, this radar can provide critical target information like distance and angle, while also supporting situational display functionality.

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.

MDG-200 Radio Altimeter

The MDG-200 radio height-setting device operates in the C-band and adopts a monopulse working system. Its sensitive component is of the heterodyne type, and the circulator at the antenna terminal uses a transceiver common-mode configuration. Prior to missile launch, the height-setting device needs to be powered on; it then performs a self-check and completes height setting via the communication interface. After the missile is launched, the radio frequency (RF) module is activated, and a gate is set based on the preconfigured height. When the preset height is reached, the device outputs height-setting command information and telemetry data. The MDG-200 height-setting device features mature technology: the monopulse design enhances the altimeter’s height measurement performance, and the device also has the characteristic of not being affected by the carrier’s speed.

Full Function Radio Altimeter MMK-4

The MMK-4 altimeter is a full-function radio altimeter that meets aerospace standards; serving as a key component for longitudinal altitude channel control, it can be widely applied in cruise missiles and aircraft to measure altitude relative to the sea or ground. The MMK-4 adopts linear modulation coefficient technology adaptive to height changes and echo signal narrow-band receiving technology to enhance the product’s resistance to active interference, uses coherent local oscillator mixing to achieve superior performance in resisting co-frequency asynchronous interference, employs echo signal spectrum front detection technology to improve tracking accuracy, and follows the design principles of serialization, standardization, and modularization—endowing it with good product inheritance, maturity, and reliability.

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.

MY-70D Anti Jamming Radio Altimeter

Operating in the C-band, the MY-70D radio altimeter employs a frequency-modulated continuous wave (FMCW) operating system and incorporates closed-loop tracking measurement technology, equipping it with the capability to resist same-frequency asynchronous interference. This ensures that when multiple aircraft take off and fly simultaneously, their altimeters do not interfere with one another. To achieve resistance against active interference, the altimeter adopts a range of measures, including anti-blocking, anti-burnout, power control, beam control, frequency agility, and frequency modulation (FM) technology. Furthermore, it features silent power supply control for its microwave components; its antenna is fitted with a band-pass filter, and a customized radome with frequency-selective functionality is utilized—these design elements enable the altimeter to achieve a wave transmission rate of ≥85% for the operating frequency within the band and less than 10% for out-of-band frequencies, thereby realizing stealth capabilities.

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