What happens if a transmitting antenna is touching metal, i.e., a fence, a sheet of tin, etc....what exactly is the RF doing under those circumstances when the transmitter is turned on?
2007-04-19 00:25:07 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
Contact with metal changes the length of the waves that the antenna can transmit without harmonics, since the length of the metal used for transmission must be evenly divisible into the length of the transmitted wave.
2007-04-19 00:35:45 · answer #1 · answered by Clown Knows 7 · 0⤊ 1⤋
Contact with metal (a good conductor of electrons) would include the metal as part of the antenna. An antenna is tuned (capacitors and inductors or oscillating tank circuits, etc.) to make optimum use of the transmitted signals energy at a specified transmission frequency. Contact may detune the antenna and likely not improve the signal strength especially if the signal is lost to ground.
2007-04-19 01:08:17 · answer #2 · answered by Kes 7 · 1⤊ 0⤋
It depends on the size, shape and grounding of the contacted metal. For instance, the fence may be grounded in which case the transmitter will be grounded, not good for the transmitter. It also depends on the transmitter design and how well it can handle impedance mismatches. If it is designed well, it will limit power output. If not, it may damage the power output stage.
2007-04-19 04:25:02 · answer #3 · answered by zeb 4 · 0⤊ 0⤋
Frequency is affected and attenuation starts at the source, You may end up with noise and hormonics due to the metals that act as part of the transmittor.
Proximity of such metalic substances may even cause reverbrations, which may be super loaded to the transmittors waves.
2007-04-19 01:07:45 · answer #4 · answered by Anonymous · 0⤊ 0⤋
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2016-12-26 14:49:33 · answer #5 · answered by ? 3 · 0⤊ 0⤋
The antenna will be detuned from the frequency it was designed to operate at and it work less efficiently.
2007-04-19 01:03:02 · answer #6 · answered by Gene 7 · 0⤊ 0⤋