Antenna Measurement Chambers

PPG aerospace engineered material cuming lehman Antenna Measurement Chambers

Antenna measurement chambers can be utilized to make far-field antenna pattern measurements.  These chambers are designed either in a rectangular or tapered configuration depending on the frequency range of interest.  Rectangular Antenna Measurement Chambers, like the one shown above, are the most common type of Antenna Chamber.  The chamber size is dependent on the frequency range and the quiet zone size required.

The test zone diameter is set by the range equation R = 2D²/ λ. The quiet zone (test region) is made up of two components, the amplitude illumination and the phase taper. The former is set by the cross section of the chamber and the half power beam width of the source antenna and the phase by the range equation.

Contact us today for more information on an Antenna Measurement Chamber designed to satisfy your testing needs!

Chamber Construction / Installation

CHAMBER CONSTRUCTION / SHIELDING OPTIONS

  • Stick Built– This is a term we us to describe typical construction methods (metal studs, plywood on the inside and painted drywall on the exterior).  We line the interior with 26ga galvanized sheet steel and tape the seams.  Done correctly you can easily get 75dB of shielding effectiveness.
  • Modular– This is a method utilizing a hat and flat clamping system designed to hold 3/4″ thick, solid (structural) core panels laminated with 26 gauge, electrolytically deposited zinc sheet steel.  This system is designed to provide better than 100dB of shielding effectiveness, effortlessly meeting MIL-STD 285 and IEEE-299.  An Advantage of this system is the chamber can be relocated because it is self-supporting.
  • Welded – Welded chambers employ high quality peripheral steel with continuously welded seams and joints.  Typically used when security is an important issue; however, once constructed relocating the chamber is nearly impossible.  High performance doors and special waveguide vents are incorporated into the system to attain >120dB of shielding effectiveness.


ANECHOIC ABSORBER MATERIALS

  • Pyramidal Foam Absorber
  • Mounting Methods – 
    • Velcro Attachment
    • Spray Adhesive
    • Clip and Rail Method (Mechanical Attachment)


ANTENNA MEASUREMENT CHAMBER ACCESSORIES