| 摘要 |
The passband ripple of a filter arrangement, including an amplifier and a bandpass filter, is tuned to a desirable level at the expense of the output return loss of the filter arrangement. Thus, the output return loss is increased as a result of reducing the ripple. To reduce the output return loss to a desired level, a lossy network is coupled to the output of the filter. The output return loss is reduced by twice the insertion loss of the lossy network. The insertion loss of the lossy network can be compensated for by increasing the gain of the amplifier.
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