An alternative approach for designing microwave circuits using a personal computer

A computer-aided design (CAD) program, Puff, for designing microwave integrated circuits is presented. The program runs on an IBM PC, PS/2, or compatible computer, and features a single interactive-graphics screen which displays all aspects of the design. Circuit elements, such as transmission lines, coupled lines, and lumped elements, are selected from a parts list and drawn on the screen using cursor keys. The circuit analysis is then performed directly from the screen drawing. To demonstrate the various features of Puff, predictions for a 10-GHz patch antenna with a stub matching circuit are compared with measurements made with an HP 8510 network analyzer.<
>