The skin - depth of copper at a frequency of $$3 GHz$$ is $$1$$ micron ($${{{10}^{ - 6}}}$$ metre). At $$12 GHz$$, for a non - magnetic conductor whose conductivity is $$1/9$$ times that of copper, the skin $$-$$ depth would be

In a microprocessor system, the stack is used for

The half - power bandwidth of the resonant circuit of figure can be increased by

For the transfer function of a physical two-port network