| 51-55 | 56-60 | 61-65 | 66-70 | 71-75 |
|---|---|---|---|---|
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Coupler.
This matching device is inserted to make a transmitter “think” it is connected to a low standing-wave ratio (SWR) antenna.
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Hertz antenna.
A dipole or long-wire antenna is an example of a
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Circular.
Which type of polarization is used to radiate a signal using a helical satellite antenna?
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Broadleaf trees.
When siting a radio station, which type of foliage would have a more adverse effect on radio-wave propagation?
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conveying misleading information to an enemy through the deliberate radiation of EM energy.
Electromagnetic (EM) deception, as it applies to electronic warfare (EW), is
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Balun.
This matching device would be used to connect a 52-ohms RG–213 cable to an antenna with an impedance of 600-ohms.
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Half-wave dipole.
This is one of the simplest and most functional antennas in use.
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Horn.
This type of antenna is used to transmit and receive microwave signals.
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Earth.
This has the greatest effect on an antenna’s radiation pattern.
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dwell time.
In frequency-hopping (FH) operations, the interval at which each transmitter remains on a given frequency for a specific time is known as
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Omni-directional.
Which type of antenna radiates radio energy equally well in all directions?
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one wavelength.
The minimum length of a long-wire antenna is
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Inside nonconductive radomes outside or flush with the fuselage.
Where are aircraft antennas normally housed?
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Straight lines are obvious.
This is one fundamental rule about camouflage.
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Medium.
Which type of hopping-rate category changes frequencies approximately 100 times per second?
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Terminating resistor.
Add this device to make a long-wire antenna more directional.
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Near-vertical incidence sky-wave.
You should use this type of antenna to communicate over the horizon to an amphibious ship on the move or to a station up to 450 kilometers away.
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5 and 30 degrees.
At which vertical angles should the multi-hop, long-distance transmission be used in airborne antenna applications for frequencies in the upper portion of the high-frequency (HF) band?
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Near-vertical incidence sky-wave.
This is the most effective type of antennas in mountainous terrain that has a mountain between you and the distant end.
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Integrated communications security.
What does the term “ICOM” indicate?
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half-power point.
Beam width of a directive antenna is measured at the
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Directional.
How are most antennas designed that are used in satellite communications?
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In a straight path to the receiving station.
This is the best way to orient line-of-sight (LOS) antennas.
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Support.
Which electronic warfare (EW) component responds to a tasking to search for, intercept, identify, and locate intentional and unintentional sources of radiated energy?
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They must have the same word of day (WOD) and time of day (TOD).
What are the requirements for two transceivers to establish HAVE QUICK (HQ) communications?
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