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WorksheetsF023 TAv 23 - Radar EO23.02 waveguides and scanners
Total questions: 8
Worksheet time: 4mins
State one of the main parameters used to measure the effectiveness of directional radar aerial propagating a beam of energy.
(a)
Polarisation is relative to the earth and is determined from the plane in the beam that contains;
the electrical field
the magnetic field
the largest frequency
the largest amplitude
A beam shape that is broad in elevation and narrow in azimth describes what type of beam?
Fan Beam
Pencil Beam
cosec2 Beam
Broad Beam
what type of parabolic reflector is best suited for target tracking?
Paraboloid
Parabolic Cylinder
Truncated Paraboloid
Orange-Peel Paraboloid
True or False:
A phased array aerial is the simplest and cheapest method especially for 180o sector scanning
False
True
True or False:
A Planner array aerial has great agility in changing beam shape.
False
True
An aerial array that uses a larger number of active miniature transmitter-receiver elements is called:
An Active Array
a Phased Array
a Linear Array
a Planner Array
Within a three port circulator what device directs the microwaves?
Ferrite disc and permanent magnet
Dummy Load
T/R cell
Coupling slot
Choke Flange
