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Accuracy analysis of EMF standards with a segment of a transmission line

Accuracy analysis of EMF standards with a segment of a transmission line

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As has already been mentioned, an EMF standard with a segment of a transmission line, working in conditions of full matching in both its sides, has many advantages compared to sets radiating EM energy into space. The main advantages include a simple design, a possibility to generate quite strong EMF with relatively low exciting power, insensitivity to external fields and very limited energy radiated outside of a set, an ability to work in a wide frequency range, and simple and frequency-independent relationship between power (voltage) exciting a set and EMF inside it. The most important disadvantages include very limited space inside a set and strong couplings between a line and an OUT. The most popular and the most widely applied solution consists of a segment of strip line with basic mode TEM; this is usually called a TEM cell.

Chapter Contents:

  • 6.1 EMF in a strip line
  • 6.2 Wave impedance of a TEM cell
  • 6.3 Accuracy of the line accomplishment and its role in line accuracy limitation
  • 6.4 Disturbances of the wave impedance
  • 6.5 Line excitation measurement accuracy
  • 6.5.1 Inaccuracy due to input voltage measurement
  • 6.5.2 Inaccuracy due to simultaneous input and output voltage measurement
  • 6.5.3 Inaccuracy due to incident voltage measurement
  • 6.6 Accuracy of the EMF standard with a segment of a transmission line
  • 6.7 Homogeneity of EMF in a TEM cell
  • 6.8 An OUT in a TEM cell
  • 6.8.1 An EMF probe in a TEM cell
  • 6.8.2 A TEM cell as an exposure system
  • 6.8.3 Absorption and polarization

Inspec keywords: telecommunication transmission lines; electric potential; transmission line theory; strip lines

Other keywords: EMF standards; transmission line segment; TEM cell; accuracy analysis; frequency-independent relationship; strong couplings

Subjects: Transmission line links and equipment; Transmission line theory; Electrostatics; Waveguides and microwave transmission lines

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