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Do dipole antennas have to be straight?
Dipole antennas need not be installed in a horizontal straight line. They are generally tolerant of bending, sloping or drooping as required by the antenna site. Remember, however, that dipole antennas are RF conductors. (So does the coax shield, unless it is routed at 90° from the antenna.)
Why antenna is an open circuit?
An antenna is an open circuit for DC (though there is an initial current flowing when the voltage is applied, until the capacitor is fully loaded), but is conductive when fed in AC (the feed impedance is actually 73Ω at resonant frequency).
Can a wire act as an antenna?
Answer: Yes. Your wires do act as antennas. Hence, the radiation from one wire is cancelled by the current flowing in the adjacent wire (that is travelling the opposite direction). Another question that will arise is – if its so simple, then everything could be an antenna.
How can current flow through an open wire ( like a dipole antenna )?
In fact it is the capacitance and inductnace of the wires that slows it down a bit just like the elasticity and mass per unit length of the rubber hose that slow down the travel of the news of my opening and shutting the tap}. There are consequences. The length of the dipole antenna wires begins to matter.
The long answer is ” Maxwell’s equations “. If you don’t want to understand all the gritty details of that math, then here’s a simple, incomplete understanding: the current in an antenna is associated with a magnetic field, and the voltage is associated with an electric field.
What kind of field does a small loop antenna have?
The small loop antenna is just a ring of wire, and any current in the wire produces a magnetic field surrounding the antenna. The device is an inductor, but one that has a large space-filling magnetic field.
Why does current flow from one wire to another?
Current can flow through the wire because of the inductance that every wire has. As frequency goes up, this becomes evident (as reactance increases). So at different locations on a wire, you have different potential and thus, you have current in between two points.