将SAW Filter PCB Layout的技巧免费与大家...

SAW filter PCB layout技巧AN 42

SAW Filter PCB Layout
by Allan Coon Director, Filter Product Marketing RF Monolithics, Inc. 1999

Introduction
The performance of surface acoustic wave (SAW) filters depends on a number of external factors. These include source and load impedances presented to the filter by external matching networks, the quality of the connections to the filter, the proximity of other circuitry and conducting structures, and the layout of the printed circuit board (PCB) that the filter is soldered to. This application note addresses the later from a practical point of view. The quality of the PCB design can affect critical passband characteristics as well as the ultimate rejection of a SAW band-pass filter. This tutorial outlines the basic principles of PCB design required to obtain the best perfor