FARADAY CAGE / SHIELDED CHAMBER

CHARACTERISTICS FEATURES:

  • A PAN type design for high performance shielded chamber, a Total Steel Structure (TSS), an improved design over conventional sandwich type wood core structure (WCS).
  • Self supporting.
  • Very easy to construct.
  • Fitted with RF Gaskets.
  • Not affected by water and moisture.
  • Superior Attenuation with less weight.
  • Cutting and bending by Laser / CNC machines.
  • Easy expandability and relocation using less parts.
  • Radiography quality TIG welding of corners of panels.
  • 100% testing of welding by Radiography Testing Method.
  • TSS is very desirable in geographic regions with seismic problems.
  • Unique Flat Surface Inside/Outside: The walls and the roof construction by flat surface inside and the floor were constructed by flat outside, which is the most ideal.
  • Shielding Effectiveness (SE):

    SE tested as per either of IEEE Std, 299 MIL Std 285 or EN 50147-1.

    Frequency Field Minimum Shielding Effectiveness in dB
    10 KHz MAGNETIC 50 dB
    100 KHz TO 1 MHz MAGNETIC 100 dB
    100 KHz TO 10 MHz ELECTRIC 100 dB
    100 KHz TO 10 MHz PLANE WAVE 100 dB
    1 GHz TO 40 GHz MICROWAVE 100 dB

    Shielded Doors:

  • 2-point cam locking system.
  • Doors are designed to open approx.180 degree.
  • Rail Road gasket used between the door frame and the basic Pan structure.
  • Door leaf hanging on the frame by the two hinges mounted in the door frame.
  • Three rows of Copper Beryllium fingers in two pockets were provided for ensuring Shielding effectiveness.
  • Ranging from single leaf to big sliding door to accommodate even EMI/EMC testing of air craft.
  • Air vents

  • Air vents generally designed with cut-off wave guide characteristics of honey- comb structure.
  • Access Panel:

  • Providing access to outer and inner signal, connectors with matched terminations on both ends.
  • Signal Filters:

  • Power line filters both for single/three phase power supplies of different current ratings, frequencies including DC filters and filters for
  • Telephone line filters.
  • Optical waveguide feed through
  • Isolation transformers, etc
  • Single Point earthing to Earthing Pits:

    Pipe-in-pipe, electrolytic type maintenance free earthing, Shielded structure, isolation transformers are connected to earth pits.

    Area of Applications:

  • Noise Security.
  • TEMPEST Security Areas.
  • EMI/RFI testing and research.
  • High security communications.
  • Securing data processing centers.
  • Sophisticated electronic equipment manufacturing test, calibration & repair rooms.
  • Areas of high security, such as government or commercial communication centers.
  • SHIELDED ANECHOIC CHAMBER

    FEATURES:

    A total low cost solution of Shielded Anechoic Chamber for antenna measurements and RCS measurement.

  • A PAN type design for high performance shielded chamber, a Total Steel Structure (TSS), an improved design over conventional sandwich type wood core structure (WCS).
  • TSS offers years of maintenance free, high RF attenuation.
  • Easy expandability and relocation using less parts.
  • P.U. Foam based pyramidal/wedge/walk –on/corner absorbers as required.
  • Access Panel: Providing access to outer and inner signal. Consists of various RF connectors with matched terminations on both ends.
  • Provided power line filter one phase, 2 lines, 15 Amperes, 220V.
  • Various accessories and components available to utilize chamber in best possible way for various tests
  • Specifications:

  • Frequency Range: 800MHz – 18GHz and beyond.
  • Shielding Effectiveness (SE): Min.-80 dB on walls and -80 dB on windows or door. SE tested as per IEEE STD, 299.
  • Quiet-Zone size: 0.5m X 0.5m Cross section. Length of quiet zone can be customized.
  • Quietness Level: Min -30 dB at 800MHz raising to -40 dB at 3.0 GHz and higher frequencies.
    • Microwave Absorbers-
    • P.U. Foam based absorber tested as per IEEE STD. 1128.
    • All Absorbers to be used are Fire Retarded: Passes NRL-8093, USA test 1, 2 & 3 With Zero Halogen Means.
      Chamber Construction Details-
    • PAN Type Shielded structure.
    • 2mm thick hot galvanized sheets used for PAN manufacturing.
    • Cutting and bending by Laser / CNC machines.
    • Radiography quality TIG welding of corners of panels.
    • Joining of PANs using Rail Road wire mesh based metallic Gasket.
      Shielded Window-
    • Windows are designed to open approx.180°.
    • Rail Road gasket used between the window frame and the basic Pan structure.
    • Two rows of Copper Beryllium fingers are provided for ensuring Shielding Effectiveness.

    APPLICATIONS:

    • For various RF and Microwave Measurements under controlled conditions.
    • RF Noise Security.
    • EMI/RFI testing and research.
    • High security communications.
    • Areas of high security, such as government or commercial communication centers.

    ACCESSORIES (Optional):

      Antenna Positioner-
    • Advanced Antenna positioner with turntable capable of 360 degree azimuth rotation with 1 degree step precisely controlled by PC software.
    • Load bearing capacity 5.0Kg.
    • Antenna positioner can be synchronized with various analyzers like VNA, Power Meter etc. to record power reading automatically at various positions.
    • PC interface software to operate positioner & to draw polar plots.
    • Low RCS stands for both transmitting & receiving antennas mounting.
    • Various RF cables & connectors to be used inside chamber.

    ANECHOIC TEST BOXES

    FEATURES

  • Low cost solution to anechoic chamber.
  • Set consists of two boxes, one for Transmitter (Tx) and other Receiver(Rx) for AUT/DUT.
  • Five side absorber covered metallic movable plate.
  • Optimum performing absorbers at near normal/grazing incidences of extraneous signals used.
  • Low RCS stand supplied to hold transmitting/receiving Antenna with our Automatic antenna positioner synchronized with various instruments
  • APPLICATIONS

  • Necessary requirement for accurate antenna measurements & RCS measurements.
  • SPECIFICATIONS

  • Frequency Range: 800MHz-18GHz and beyond
  • Each box of 1.2m X 1.2m X 1.2m size.
  • Test zone size where Antenna Under Test (AUT) to be placed is 0.2mX0.2mX0.2m in receiving box.
  • Reflection signal (reaching test zone) down by min -30dB with respect to direct signal at 800 MHz raising up to -40dB at 3.0 GHz and higher frequencies.
  • All Absorbers to be used are Fire Retardant per Passes NRL-8093, test 1, 2 & 3 With Zero Halogen Means.
  • AVAILABLE OPTION

      Advanced Antenna positioner
    • With turntable capable of 360 degree azimuth rotation with 1 degree step precisely controlled by PC software.
    • Load bearing capacity 5.0Kg
    • Antenna positioner can be synchronized with various analyzers like VNA, Power Meter etc. to record power reading automatically at various positions.
    • PC interface software to operate positioner & to draw polar plots.
  • Low RCS stands for both transmitting & receiving antennas mounting.
  • Various RF cables & connectors to be used inside chamber.
  • SHIELDED ANECHOIC TENT

    Structure:

  • The frame is in Alluminum 6082 tube diam. 34mm thick 4,5mm.
  • The joints are type 6-1″ diam. 33,7mm.
  • The weight of the dimension 8x5 h.3,5 mt is 296 Kg.

  • ADDRESS

    • Sahajanand Laser Technology Ltd E-30, GIDC, Sector 26, Electronics Estate, Gandhinagar, Gujarat - 382 028, INDIA.
    • Email: microwave@sahajanandlaser.com
      kanhiyalal@sahajanandlaser.com
    • Website: www.sltmicrowave.com
    • Contact Person: Dr. Kanhiya Lal
      Mobile No: +91 - 9810596888