A transmission line is called uniform when its parameters do not vary in the direction of propagation. If we assign the z coordinate to the propagation direction then the propagation of a sinusoidal wave can be described by a function exp(jωt — γz) which is common to all field components. The constant y is called the propagation exponent and is in general a complex quantity. Its real part (α) is called the damping coefficient and its imaginary part (k) the propagation coefficient or wave number. For lossless lines the t-z dependence simplifies to exp[j (ωt — kz)]. Another important quantity that characterizes a transmission line is the characteristic impedance Zo, in principle also a complex quantity.
- Reflection Coefficient
- Transmission Line
- Directional Coupler
- Characteristic Impedance
- Rectangular Waveguide
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van de Roer, T.G. (1994). Transmission lines and microwave circuits. In: Microwave Electronic Devices. Microwave Technology Series, vol 10. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-2500-4_7
Publisher Name: Springer, Boston, MA
Print ISBN: 978-0-412-48200-7
Online ISBN: 978-1-4615-2500-4
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