RCDD · Question #239
In order to maximize its ability to send and receive, an antenna should be ________ to the desired frequency.
The correct answer is C. Tuned. An antenna must be tuned - physically or electrically adjusted to resonate at the target frequency - to achieve maximum radiation efficiency and receive sensitivity.
Question
In order to maximize its ability to send and receive, an antenna should be ________ to the desired frequency.
Options
- ADipped
- BLoaded
- CTuned
- DPeaked
How the community answered
(18 responses)- A11% (2)
- B6% (1)
- C83% (15)
Why each option
An antenna must be tuned - physically or electrically adjusted to resonate at the target frequency - to achieve maximum radiation efficiency and receive sensitivity.
Dipping is not a recognized standard antenna optimization technique and does not describe any process for matching an antenna to its operating frequency.
Loading refers specifically to adding inductance or capacitance to electrically shorten or lengthen an antenna - it is one method used as part of tuning but is not the general term for maximizing antenna efficiency.
Tuning an antenna means setting its resonant frequency to match the operating frequency, typically by adjusting its physical length to a specific fraction of the wavelength such as a quarter-wave or half-wave. At resonance, the antenna's inductive and capacitive reactances cancel, the feed-point impedance becomes purely resistive, and maximum power transfer occurs between the transmission line and the antenna, optimizing both transmit and receive performance.
Peaking describes adjusting a circuit for maximum signal output in alignment procedures and does not specifically refer to the process of resonating an antenna at its operating frequency.
Concept tested: Antenna resonance and frequency tuning fundamentals
Source: https://www.cisco.com/c/en/us/products/collateral/wireless/aironet-antennas-accessories/prod_white_paper0900aecd806a1a3e.html
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