3-J-065: Frequency and Bandwidth
3-65J1:
A vertical 1/4 wave antenna receives signals:
Equally from all horizontal directions.
In the microwave band.
In one vertical direction.
In one horizontal direction.
3-65J2:
The resonant frequency of a Hertz antenna can be lowered by:
Placing an inductance in series with the antenna.
Lowering the frequency of the transmitter.
Placing a condenser in series with the antenna.
Placing a resistor in series with the antenna.
3-65J3:
An excited 1/2 wavelength antenna produces:
Both electro-magnetic and electro-static fields.
Residual fields.
An electro-magnetic field only.
An electro-flux field sometimes.
3-65J4:
To increase the resonant frequency of a 1/4 wavelength antenna:
Add a capacitor in series.
Lower capacitor value.
Cut antenna.
Add an inductor.
3-65J5:
What happens to the bandwidth of an antenna as it is shortened through the use of loading coils?
It is decreased.
It is increased.
No change occurs.
It becomes flat.
3-65J6:
To lengthen an antenna electrically, add a:
Coil.
Resistor.
Battery.
Conduit.
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