propagation constant การใช้

• As a result, it represents the propagation constant in the periodic medium.
• Waveguide dispersion is dependent on the propagation constant.
• The propagation constant \ gamma of the guided wave is complex, in general.
• The propagation constant of the polaritons can be modified by varying the dielectric material.
• We can call this K ( w ) a propagation constant in line with Futterman.
• The propagation constant is a useful concept in filter design which invariably uses a cascaded section topology.
• Below a certain frequency ( the cut-off frequency ) the propagation constant becomes an imaginary number.
• The following result can be applied at any point along the transmission line, where gamma is defined as the propagation constant.
• The term " propagation constant " is somewhat of a misnomer as it usually varies strongly with " ? ".
• One such example, dual polarisation interferometry uses a buried waveguide as a reference against which the change in propagation constant is measured.
• For instance, the propagation constant of a hollow metal waveguide is a strong function of frequency ( a so-called dispersion relation ).
• Where n _ 1 is the index of air ( ~ 1 ) and \ beta _ m is the propagation constant of the waveguide.
• Other evanescent wave biosensors have been commercialised using waveguides where the propagation constant through the waveguide is changed by the absorption of molecules to the waveguide surface.
• The phase of the sinusoid varies with distance which results in the propagation constant being a complex number, the imaginary part being caused by the phase change.
• In a cascaded topology, the propagation constant, attenuation constant and phase constant of individual sections may be simply added to find the total propagation constant etc.
• In a cascaded topology, the propagation constant, attenuation constant and phase constant of individual sections may be simply added to find the total propagation constant etc.
• This modification causes resonance angle shifting as in the example shown in Figure 10, from ?1 to ?2 due to the change on the surface plasmon propagation constant.
• For example, \ underline { k } is sometimes called " propagation constant " instead of " ? ", which swaps the real and imaginary parts.
• The analysis yields a system of two first order, simultaneous linear partial differential equations which may be combined to derive the secondary constants of characteristic impedance and propagation constant.
• The propagation constant is expressed logarithmically, almost universally to the base " e ", rather than the more usual base 10 used in telecommunications in other situations.