... must be a system and, before that, a system design. In the early stages of system design we use a general knowledge of the per-formance available from various system components. As the design progresses,we ... knowledge of impedances and7Practical RF System Design. William F. EganCopyright2003 John Wiley & Sons, Inc.ISBN: 0-471-20023-9PRACTICAL RF SYSTEM DESIGN WILLIAM F. EGAN, Ph.D.Lecturer ... example, a particular amplifier design may producea stable phase shift that has a fortuitous effect on system performance, but wewould have to control changes in its design and in that of interacting...