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Home » Unmanned System Products » Small Radio Altimeter MY-28A、MY-24(XXX-28A、XXX-24)
Mini Radio Altimeter MY-4001
Mini Radio Altimeter MY-4001
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Subminiature Radio Altimeter MY-3001
Subminiature Radio Altimeter MY-3001

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

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

  • Operating frequency: 4300 ± 100MHz;
  • Radiation power: 20 ~ 24dBmW;
  • Receiving sensitivity: better than – 85dBmW;
  • Height measurement capacity: no less than 3000m;
  • Altimetry accuracy: ±0.6 m, 1m﹤H≤10m; ±(0.3+0.03×H) m, 10m﹤H≤3000m;
  • Adaptive flight attitude: pitch ± 30 ° and roll ± 45 °;
  • Horizontal velocity: 0-3 mach;
  • The power supply DC is 18 ~ 36V, and the consumption current is not more than 0.8A;
  • Working temperature: – 40 ~+ 60 ℃
  • Output form: RS422

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

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

 

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

Dimension and weight of each part of altimeter

Serial number Name Size Weight(kg)
1 Measurement and control unit Effective body size: 130mm×86mm×56mm
Maximum dimension: 152mm×86mm×56mm
≤1.50
2 Transmitting antenna 155mm×40mm×6mm; (without SMA connector) ≤0.3
3 Receiving antenna 155mm×40mm×6mm; (without SMA connector) ≤0.3
4 Feeder Transmission feeder length: 2800mm ≤0.4
Receiving feeder length: 2800mm

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Radio Altimeter MY-3001M

The MY-3001m radio altimeter is a radar altimeter developed for the Rainbow XX UAV by a specific institute. It is widely used in UAVs to measure the altitude relative to the sea surface or the ground. This altimeter incorporates a linear modulation coefficient technology adaptable to altitude changes and a narrow-band receiving technology for echo signals, which enhances the product’s resistance to active interference. It also adopts coherent local oscillator mixing, delivering superior performance in resisting synchronous interference, and employs echo signal spectrum front-edge detection technology to improve tracking accuracy. Additionally, it features a three-dimensional design based on serialization, standardization, and modularization, endowing the product with excellent inheritance, maturity, and reliability. While retaining the closed-loop tracking system, the MY-3001m radio altimeter further adopts digital control technology, microwave integration technology, and hybrid integration technology to achieve product modularization. Moreover, its receiver is equipped with dual filters, which further boosts the product’s anti-interference capability.

MY-5001B Radio Altimeter for Sea Condition Identification

The MY-5001B radio altimeter is an all-solid-state C-band device featuring a frequency-modulated continuous wave (FM-CW) system, a constant differential beat frequency, and a closed-loop tracking and measurement mechanism. It ensures a constant beat frequency through servo control of the slope of the sawtooth wave that modulates the microwave oscillator, thereby achieving automatic height tracking. This altimeter incorporates a suite of advanced technologies, including narrowband reception, weighted frequency discrimination, equivalent spectrum leading edge detection, gain PID control, instantaneous sensitivity compensation, temperature compensation, horizon frequency selection design, and power silence. These technologies collectively endow it with advantages such as accurate height measurement, stable tracking, adaptability to various terrains, a wide height measurement range, high precision, and strong anti-interference capabilities.

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.

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 special aircraft.

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.

Pulse Radar Altimeter MY-600L、MY-800L

The MY-600L altimeter is a fixed-frequency pulse radar altimeter developed for a specific type of aircraft, while the MY-800L altimeter is a frequency-agile pulse radar altimeter designed for another particular aircraft model. Both altimeters find wide application in aircraft, serving to measure the relative height above the sea or ground. Notably, the MY-600L features a design approach centered on serialization, standardization, and modularization, which endows it with favorable product inheritance, high maturity, and reliable performance.

Mini Radio Altimeter MY-4001

The MY-4001 series altimeter represents the latest generation of radar altimeters. While complying with aerospace standards, it boasts an extremely compact size, with external dimensions measuring a mere 86mm × 52mm × 25mm. As a full-featured radio altimeter, the MY-4001 serves as a core component for the control of the longitudinal altitude channel. It finds wide application in flying missiles and unmanned aerial vehicles (UAVs) to measure altitude relative to the sea surface or ground.
Employing a linear frequency-modulated continuous wave (LFMCW) measurement system, the MY-4001 exhibits outstanding characteristics, including high precision, strong anti-interference capability, excellent battery compatibility, and stable, reliable operation. These attributes make it particularly well-suited for radar altitude measurement in ultra-light and ultra-small aircraft. For interface output, it adopts RS422 and CAN protocols, which effectively enhances the reliability of the product's data transmission.

MDG-300 Radio Altimeter

The MDG-300 radio height-fixing device operates in the C-band and adopts a pulse compression system. Its sensitive component is of the heterodyne type, and the circulator at the antenna terminal uses a transceiver common-mode design. Prior to missile launch, 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 a gate is set in accordance with the preset height. When the preset height is reached, the device outputs height-fixing command information and telemetry data. The MDG-300 height-fixing device features mature technology: its pulse compression technology can enhance the altimeter’s height measurement performance, and it has the characteristic of a wide height measurement range. Additionally, the digital pulse compression function based on FPGA (Field-Programmable Gate Array) endows it with advantages such as small size, low power consumption, and low cost.

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