Transmission Line Characteristic Of Silicon-based Rf Ics

Microstrips structures have been applied widely in many regions because of their own advantages. To meet a lot of practical needs, many kinds of new materials and microstrip structures are designed and produced continually. Compared with the increasing applications, theoretical analysis should be improved further. Hence, how to analyze complex microstrip structures is an urgent and important issue. With the fast development of Si-based microwave circuit, this paper discussed several Si-based microstrip structures and their application in practical. The main point of this issue can be concluded as follows:1. From the CAD formulas of microstrip couplelines and a microstrip line of two-layer substrate, we obtain the CAD formulas of microstrip couplelines on a two-layer substrate by synthetic asymptote. And then get characteristic impedance and propagation constant, also we considered the loss of substrate for practical microwave circuit design.2. By using IE3D and microstrip equivalent circuit, we get microstrip open-end lengthΔl and then with curve-fitting method we obtained the formula of Si-based microstrip open-end. And then take it into the practical use of microwave circuit design, like Low-pass filter, divider and coupler.3. With the transmission line equivalent circuit, we take composite Right/Left-handed Transmission Line into analysis. Then we apply that to radiation circuit design, and presented some practical circuits for example.4. Multiconductor transmission lines system is analyzed to extract their capacitance matrix and inductance matrix via the moment method, which is foundation of obtaining their CAD formulas.