Photonic EMF Measurements

Photonic EMF Measurements

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Until now, the dominating technique for EMF measurement was to use an antenna (mainly a dipole or a loop) loaded with a detector (a diode or, more rarely, a thermocouple) and transfer the DC voltage from the probe to an indicator (in the case of the most popular designs of two piece meters) through a high-resistance (transparent) transmission line (Fig. 9.1a). The most important inconvenience of this technique is the vanishing of phase information that is (sometimes) indispensable; similarly, the spectral information is lost as well. Although the latter is usually unnecessary, especially where wideband measurements are of concern, we will see in our further considerations that it is possible and advantageous to perform wideband measurements using spectral information as well.

Chapter Contents:

  • 9.1 The Photonic EMF Probe
  • 9.2 Frequency Response of the Probe
  • 9.3 Sensitivity of the Photonic Probe
  • 9.4 Magnetic Field Photonic Probe
  • 9.5 Detector Linearity
  • 9.6 Synthesis of the Spherical Directional Pattern
  • 9.7 The 'Future Meter'

Inspec keywords: electromagnetic field theory; antennas; electromagnetic wave propagation

Other keywords: dominating technique; wideband measurements; detector; photonic EMF measurements; antenna

Subjects: Antennas; Electromagnetic wave propagation

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