Radar is essentially an echo ranging system

More Questions from Microwave Communication

• A directional coupler is used to determine
• A TR (transmitter receiver) tube has
• Assertion (A): In TE10 mode the cutoff frequency of rectangular waveguide is where a is the broad dimension and c is velocity of light. Reason (R): TE10 mode is the dominant mode in rectangular waveguide.
• Which mode has the minimum cutoff frequency in rectangular wave guides?
• The radiation resistance of a doublet antenna of length dl is proportional to
• Assertion (A): A small section of high impedance line is equivalent to a series inductance. Reason (R): A small section of a low impedance line is equivalent to a series resistance.
• When duct propagation exists
• As compared to dimensions of most feeds, the skin depth at microwave frequencies is
• In which mode of rectangular waveguide are all field components zero?
• A microstrip line has dielectric having relative permittivity ∈r. The effective dielectric constant is

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