Understanding RF Transmission Lines by Measurement and Calculation

Index

Paragraph	Page

Article
1.1) Introduction	1
1.2) Measuring Voltage	1
1.3) Measuring Current	1
2.1) Impedance of Terminations, Signal Generators and Coaxial Cables	2
2.2) Termination Impedance	2
2.3) Signal Generator Source Impedance	2
2.4) Coaxial Cable Characteristic Impedance	2
3.1) Coaxial Cable Attenuation	3
3.2) Coaxial Cable Attenuation per Metre	3
3.3) Coaxial Cable Attenuation with Frequency	4
4.1) Reflection in a Coaxial Cable	5
4.2) Forward Direction	5
4.3) Reflected Direction	5
5.1) Velocity of Propagation	6
5.2) Velocity Factor of a Coaxial Cable	6
5.3) Forward Voltage in a Coaxial Cable	7
5.4) Relative Phase of FORWARD and REFLECTED signals in a SHORT	8
5.5) Relative Phase of FORWARD and REFLECTED signals in an OPEN	8
5.6) Relative Phase of FORWARD and REFLECTED signals in a mismatch	8
6.1) Complex Impedance	9
6.2) Phase relationships Along the Length of a Mismatched Transmission Line	9

Appendix B - Bridge
B.1) Introduction	b1
B.2) Circuit Description - Transformers	b1
B.3) Circuit Description - Reflected Direction	b1
B.4) Circuit Description - Forward Direction	b1

Appendix C - Current/Voltage Detector
C.1) Introduction	c1
C.2) Principle of Sine Wave Detection with a Diode	c1
C.3) Mathematically Linearising a Detection Diode	c1
C.4) Plotting the Diode Curve	c1
C.5) Finding the Voltage Correction Constants	c2
C.6) Principle of the Current Detection Circuit	c2
C.7) Plotting the Current Curve	c2
C.8) Finding the Current Correction Constants	c2
C.9) Peak Sum Voltage and Peak Sum Current	c2