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Principle


Dielectric constant (Dk) is a measure of how readily a material absorbs energy while in the presence of a field. Dissipation factor (Df) is a measure of how readily that material gives up the stored energy after the field has been removed.


Capabilities


Capacitance Measurement and via Resonance Cavities

  • ASTM D150 utilizes a parallel plate electrode assembly in conjunction with an LCR meter
  • ASTM D2520 utilizes rectangular prism and split-post resonators
  • IPC-TM-650 utilizes split-cylinder resonators
  • Sample sizes for the D150 method are 2" round or square (minimum 5 required)
  • Sample sizes for the other methods are specific to each resonator and frequency (minimum 5 required)
  • Testing temperatures (lab ambient)


Equipment



Equipment Type

Information

                  

Agilent LCR Meter
  • Frequency range 20Hz - 2MHz
  • Measures Dk as ratio of material to vacuum capacitance
  • Measures Df as ratio of current through resistance and capacitance circuits

               

Agilent Parallel Plate Electrode 16451B

  • Can be tested as contact or gap method
  • Four different electrodes, depending on material type and method
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