| This
graph indicates the typical phase linearity filter performance.
Example: a 6-section filter with a 1.5 dB insertion loss at
center frequency typically exhibits a plus or minus 5-degree
linearity over 71% of the 3 dB bandwidth. Note: For special
ultraflat phase linear filters, consult factory. |
This
graph indicates the effect of the number of sections and insertion
loss on the relationship of 1.5:1 VSWR bandwidth to 3 dB relative
bandwidth |
The
3 dB bandwidth is a minimum bandwidth. Typical bandwidth variation
relative to manufacturing and materials tolerances can be defined
by this graph.
Example:
Bandpass filter
Center frequency = 1000 MHz
3 dB bandwidth = 100 MHz
3 dB bandwidth % = 10%
Tolerance factor = 1.115
The 3 dB relative bandwidth could vary from 100 MHz to 111.5
MHz. |
