Lumped Elements for RF and Microwave Circuits

A lumped element in microwave circuits is defined as a passive component whose size across any dimension is much smaller than the operating wavelength so that there is no appreciable phase shift between the input and output terminals. Generally, keeping the maximum dimension less thanl /20 is a good approximation where l is the guide wavelength. Lumped elements for use at RF and microwave frequencies are designed on the basis of this consideration. RF and microwave circuits use three basic lumped-element building blocks; capacitors, inductors and resistors. Lumped inductor transformers and baluns are also commonly used in many circuits.

Từ khóa: Microwave Circuits, Lumped Elements for RF, microwave frequencies, mạch vi sóng, máy biến áp, tần số vi sóng