免费共享经典著作Radio Frequency Circui...

Appendix E Termination of a Transistor Port with a LoadRadio Frequency Circuit Design. W. Alan Davis, Krishna Agarwal Copyright 2001 John Wiley & Sons, Inc. Print ISBN 0-471-35052-4 Electronic ISBN 0-471-20068-9

APPENDIX E

Termination of a Transistor Port With a Load

In the three-port circuit in Fig. E.1, one of the three ports is terminated with an impedance that has a reection coefcient relative to the reference impedance Zref : Zi Zref ri D E.1 Zi C Zref In this expression the subscript i represents s, g, or d depending on whether the device connection is common source, gate, or drain terminated with Zs , Zg , or Zd . The incident and scattered waves from the three-port is b1 D S11 a1 C S12 a2 C S13 a3 b2 D S21 a1 C S22 a2 C S23 a3 b3 D S31 a1 C S32 a2 C S33 a3 E.2 E.3 E.4

When one of the ports is terminated with ri , then the circuit