WorksheetsF023 TAv 23 - Radar EO23.02
Total questions: 12
Worksheet time: 7mins
True or False:
Conventional components such as transistor amplifiers are effected by radiation losses when dealing with frequencies above 3 GHz
True
False
The 'Lecher Bar' is an RF transmission line that behaves like a parallel tuned circuit at a distance ________ from the termination.
41λ
21λ
31λ
λ
True or False:
The frequency of a Resonant Cavity is dependent upon the size, as such it has a very wide bandwidth.
False
True
Select all the shapes below that are used to form resonant cavities
Cylindrical
Rectangular
Rhumbatron
Pyramidal
Spherical
Resonant Cavity Coupling can be achieved using Loop Coupling which interacts with:
the H (magnetic) field
the E (electric) field
the Wall Currents
True or False:
Radar Frequency amplifiers and oscillators rely on velocity modulation.
Velocity modulation varies the velocity of electrons that make up the current in the device, rather than their numbers.
True
False
Which of these characteristics are not associated with a Cavity Magnetron.
uses an odd number of resonant cavities
has a narrow bandwidth
it is a high power RF oscillator
Very noisy internally
In the diagram of a local oscillator what component is being represented by label B?
Varactor Diode
Gunn Diode
Zener Diode
Variable Capacitor
Select all the amplifiers from the components below
Travelling Wave Tube
Klystron
Magnetron
Gunn Diode Tuned Cavity
Lecher Bar
Why would a dented waveguide require replacement?
Waveguides rely on their dimension to propagate certain frequencies
the dent will cause a change in the operating frequency
the dent will cause an internal pressure increase damaging the connecting components
the dent will allow transition power to radiate from the waveguide
What component is used to absorb microwave energy without reflections?
Dummy Load
Flexible Joint
Rotating Joint
Slot Coupled Attenuator
What is the purpose of a Choke Flange Joint
To provide an Electrical short circuit between to waveguides
To provide an magnetic short circuit between to waveguides
To provide an capacitive circuit between to waveguides
To provide an inductive circuit between to waveguides
