Design, Realisation and Validation of Antenna Pressurisation System for Radars

Antenna Pressurisation System for Radars

Authors

  • Kumar Gaurab Electronic and Radar Development Establishment (LRDE) DRDO
  • Pazhanivel S Electronic and Radar Development Establishment (LRDE) - DRDO
  • Ajit Kumar K Electronic and Radar Development Establishment (LRDE) - DRDO
  • Jaikumar Venkataraman Electronic and Radar Development Establishment (LRDE) - DRDO
  • Shivakumar N Entec Engg Pvt. Ltd.

Keywords:

APS (Antenna Pressurisation system), Relative Humidity, Moisture, Dew Point, PLC, Remote control

Abstract

An Antenna Pressurisation System has been designed and developed for Medium Power Transportable Radar. It is designed to supply the antenna cabin with dehumidified air so that the Active Array Antennae electronics inside the antenna cabin works properly and enhances the reliability of the system. Active array antennae generates lot of heat and requires liquid cooling. Kilowatts of heat generated by these units are removed by circulating chilled water through cold plates on which antenna electronics are mounted. Chilled water is supplied at around 20oC. Moisture present in air inside antenna cabin can condense in contact with low temperature and can cause short circuit in components. It is also found that fungus and mold growth is minimal in absence of excess moisture. It has been found that complete absence of moisture is also harmful for the life of PCBs, which will release all its moisture and gets churned if kept in contact with totally dry air. It is found that 30-40 % RH in air is best for maximum life of electronics. Antenna Pressurisation System has been developed to supply dehumidified air to the Antenna Cabin, and it will maintain the cabin air above atmospheric pressure so that outside humid air will not enter the antenna cabin. System has been designed with PLC interface so that its operation can be monitored remotely. Its operation is automated for switching on and off controlled by feedback loop with pressure and humidity sensor.

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References

E. J. HEARN, Mechanics of material, Volume I, Third edition, Butterworth-Heinemann.

HENARY BROWN, Five hundred and seven mechanical movements, Brown, Coombs & co.

SHIGLEY JOSEPH, Mechanical engineering design, Mc Graw Hill.

Principle of pressure swing operation.

Design, Realisation and Validation of Antenna Pressurisation System for Radars

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Published

2018-04-01

How to Cite

[1]
K. . Gaurab, P. S, A. K. K, J. Venkataraman, and S. N, “Design, Realisation and Validation of Antenna Pressurisation System for Radars: Antenna Pressurisation System for Radars”, TEMSJ, vol. 1, no. 4, Apr. 2018.

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Articles