Products  About us   Prices  Order  Search  Potential authors  Links  Contacts  Mailing

     Books   Manuals   Reports   Videos   CD-ROMs

Code: EP114

Description

This video lecture considers the basic parameters and geometry of microstrip compared with stripline, and shows the equivalence with coaxial line transmission. The relevance of geometry, composition and quality of conductors to their performance is also discussed particularly in relation to current concentration, i.e., skin effect. Substrate properties of alumina, sapphire and RT/duroid are compared showing that the more expensive sapphire and 99.6% alumina have better surface finish and loss tangent. The better surface finish and delineation of thin films compared with thick films is explained and supplemented with a laboratory video sequence. Theory of propagation is also described and shows the dependence on practical properties. Techniques of measurement of microstrip properties include the cavity resonator, ring resonator and linear resonator to measure relative permittivity, effective permittivity and attenuation respectively, again supplemented by a laboratory video sequence. The effect of discontinuities and therefore the need to design to match microstrip shapes is considered. The use of coupling between adjacent conductors is also described. A number of useful references are provided.