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Pulse Radar Altimeter MY-600L、MY-800L
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Radio Altimeter MY-3001M

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.

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Description

Main Electrical Performance

  • Working frequency: 4.2 ~ 4.4ghz;
  • Height measurement range: 0.5m ~ 3000m;
  • Altimetry accuracy: 1) 0.5-20m: measurement error ≤ 0.5m; a) 20-3000m: measurement error ≤ (0.2 + 2% h) m; (Note: H is the real height of the altimeter from the ground);
  • Sensitivity: – 90dBmW;
  • Adaptive attitude angle: ± 30° roll angle and ± 30° pitch angle.
  • Output form: RS422

 

Mechanical Parameters

Dimension and weight of each part of altimeter

Serial number Name Size Weight(kg)
1 Measurement and control unit ≤169.8mm×124mm×32mm (including fixed orifice and connector) ≤0.8
≤150mm×88mm×32mm (excluding fixed orifice and connector)
2 Transmitting antenna Not more than 90mm×80mm×17mm ≤0.10
3 Receiving antenna Not more than 90mm×80mm×17mm ≤0.10
4 Feeder Transmission feeder length: 800mm –
Receiving feeder length: 2000mm –

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