| Author(s): |
James P. Randa; |
| Title: |
Noise Characterization of Multiport Amplifiers |
| Published: |
October 01, 2001 |
| Abstract: |
I address the issue of the definition and measurement of noise figure and parameters to characterize multiport devices, particularly differential amplifiers. A parameterization in terms of the noise matrix appears to be the most practical. the noise figure for a given output port is defined and related to the noise matrix and scattering parameters of the device. Two examples are considered in detail: a 3-port differential amplifier and a 4-port mixed-mode amplifier, both with reflectionless terminations. The noise figures, effective input temperatures, and gains are related to the results of a series of hot-cold measurements, as in the familiar two-port case. |
| Citation: |
IEEE Transactions on Microwave Theory and Techniques |
| Volume: |
49 |
| Issue: |
10 |
| Pages: |
pp. 1757 - 1763 |
| Keywords: |
amplifier noise;differential amplifier;multiport amplifier;noise;noise figure;noise matrix;thermal noise; |
| Research Areas: |
Electronics & Telecommunications, Microelectronics, Electromagnetics |
| PDF version: |
 Click here to retrieve PDF version of paper (114KB) |
