____ is used to optimize voltage standing wave ratio.(a) Antenna-matching unit(b) Radiating element(c) Antenna tuner(d) Power amplifierThis question was addressed to me in examination.My question comes from Hardware Architecture topic in division Software Defined Radio Architecture of Cognitive Radio

____ is used to optimize voltage standing wave ratio.(a) Antenna-match

1.	____ is used to optimize voltage standing wave ratio.(a) Antenna-matching unit(b) Radiating element(c) Antenna tuner(d) Power amplifierThis question was addressed to me in examination.My question comes from Hardware Architecture topic in division Software Defined Radio Architecture of Cognitive Radio
Answer» RIGHT choice is (c) ANTENNA tuner The best explanation: Antennas, operating over a wide frequency range, use antenna tuner to OPTIMIZE the voltage standing wave RATIO. It also results in improvement of radiation EFFICIENCY.

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