Transmission-line Theory and Microstrips

摘要: Resistance, capacitance and inductance are the three main passive elements commonly used in circuits operating up to about 300 MHz, i.e. lower end of UHF band for various functions. High-frequency from, say, a few tens megahertz upwards, normally consist a.c. d.c. (bias circuit) paths. Bias high-frequency circuits, like those at low frequencies, employ resistive networks set biasing voltages, capacitances decouple act as blocks inductances prevent signals from getting into One most important considerations circuit design is use reactive achieve impedance matching between consecutive stages. Capacitances implement impedance-matching hundred megahertz. However, frequency increases value required will eventually become too small be realized, sub-picofarad sub-nanohenry region. When frequencies high discrete capacitors inductors practical, transmission-line or distributed have employed.