Which among the following is not a reason for the use of antenna coupler?(a) To make the antenna look resistive(b) To provide the output amplifier with correct load impedance(c) To discriminate against harmonics(d) To prevent re-radiation of the local oscillatorI got this question in quiz.I want to ask this question from Practical Aspects of Sampling in chapter Multiplexing & Sampling of Bandpass Signal of Analog Communications

Which among the following is not a reason for the use of antenna coupl

1.	Which among the following is not a reason for the use of antenna coupler?(a) To make the antenna look resistive(b) To provide the output amplifier with correct load impedance(c) To discriminate against harmonics(d) To prevent re-radiation of the local oscillatorI got this question in quiz.I want to ask this question from Practical Aspects of Sampling in chapter Multiplexing & Sampling of Bandpass Signal of Analog Communications
Answer» The correct choice is (d) To PREVENT re-radiation of the local oscillator Explanation: ANTENNA coupler is a DEVICE connected between a radio transmitter or receiver and its antenna to improve power TRANSFER between them. Antenna coupler is never USED to prevent re-radiation of the local oscillator.

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