2.7) True or False: Directional antennas provide poor efficiency of power transmission. 2.8) Fill in the missing words: When an impedance mismatch occurs between an antenna and transmission line, the problem might be corrected by adjusting the antennas ? to minimize the VSWR, or inserting an impedance__?___ network.

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Superposition Theorem

The superposition theorem is applied to linear systems. For such systems, the output from two different inputs equals the sum of the outputs from each input separately. On applying this theorem many times we get the output from any number of inputs equal to the sum of the outputs from the individual inputs separately.