ATT VERIFIED EXAM TEST
what antenna do you use to determine the bearing of an object in a
radar system? - ✔ ✔ narrow horizontal beam width
a truncated parabolic antenna is normally used in a _____________ -
✔ ✔ radar microwave systems
what does adding a reflector to a horn antenna do? - ✔ ✔ increases
power and directivity
what is the physical handling and installation of a waveguide called? -
✔ ✔ pluming
a wave guide is a system that is capable of guiding ___________ - ✔
✔ electromagnetic energy
how is electromagnetic energy produced? - ✔ ✔ current flowing
through a conductor
the width of the waveguide is the ____ dimension - ✔ ✔ "a"
the height of the waveguide is the ____ dimension - ✔ ✔ "b"
what does the "a" dimension of a waveguide determine? - ✔ ✔ the
frequency range that the waveguide can handle
what does the "b" dimension of a waveguide determine? - ✔ ✔ the
power handling capacity of the waveguide
what are the two basic types of energy transmission? - ✔ ✔ pulse
and continuous wave (cw)
, modulation insures that the transmitter operates the correct _____ and
______ - ✔ ✔ pulse repetition frequency and pulse width
what is prf? - ✔ ✔ pulse repetition frequency
what is pw? - ✔ ✔ pulse width
what losses are associated with transmission lines? - ✔ ✔ resistive,
capacitive, and inductance
what loss is due to resistance, especially in long lines? - ✔ ✔ copper
loss
what loss is due to the high frequency current flowing near the outer
surface of the conductor? - ✔ ✔ skin effect
what loss is due to the capacitance formed between transmission lines?
- ✔ ✔ dielectric loss leakage
what loss is due to the portion of electrical energy lost to the
atmosphere? - ✔ ✔ radiation loss
what loss is due to the expanding and collapsing of magnetic fields? - ✔
✔ induction loss
characteristic ___________ is distributed inductance and capacitance
of the line - ✔ ✔ impedance
what is the most commonly used reference level in the decibel
measurement system for radar? - ✔ ✔ 1 miliwatt
what happens to the frequency of a cw radar rf if it reflects of an
outbound object? - ✔ ✔ decreases
what antenna do you use to determine the bearing of an object in a
radar system? - ✔ ✔ narrow horizontal beam width
a truncated parabolic antenna is normally used in a _____________ -
✔ ✔ radar microwave systems
what does adding a reflector to a horn antenna do? - ✔ ✔ increases
power and directivity
what is the physical handling and installation of a waveguide called? -
✔ ✔ pluming
a wave guide is a system that is capable of guiding ___________ - ✔
✔ electromagnetic energy
how is electromagnetic energy produced? - ✔ ✔ current flowing
through a conductor
the width of the waveguide is the ____ dimension - ✔ ✔ "a"
the height of the waveguide is the ____ dimension - ✔ ✔ "b"
what does the "a" dimension of a waveguide determine? - ✔ ✔ the
frequency range that the waveguide can handle
what does the "b" dimension of a waveguide determine? - ✔ ✔ the
power handling capacity of the waveguide
what are the two basic types of energy transmission? - ✔ ✔ pulse
and continuous wave (cw)
, modulation insures that the transmitter operates the correct _____ and
______ - ✔ ✔ pulse repetition frequency and pulse width
what is prf? - ✔ ✔ pulse repetition frequency
what is pw? - ✔ ✔ pulse width
what losses are associated with transmission lines? - ✔ ✔ resistive,
capacitive, and inductance
what loss is due to resistance, especially in long lines? - ✔ ✔ copper
loss
what loss is due to the high frequency current flowing near the outer
surface of the conductor? - ✔ ✔ skin effect
what loss is due to the capacitance formed between transmission lines?
- ✔ ✔ dielectric loss leakage
what loss is due to the portion of electrical energy lost to the
atmosphere? - ✔ ✔ radiation loss
what loss is due to the expanding and collapsing of magnetic fields? - ✔
✔ induction loss
characteristic ___________ is distributed inductance and capacitance
of the line - ✔ ✔ impedance
what is the most commonly used reference level in the decibel
measurement system for radar? - ✔ ✔ 1 miliwatt
what happens to the frequency of a cw radar rf if it reflects of an
outbound object? - ✔ ✔ decreases
