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Radar Bits

The document contains a 10 question objective exam about radar systems. The questions cover topics like angular error, transversal filters, coherent detectors, PPI displays, amplitude spectra of matched filters, universally used radar displays, control signals for parallel feed arrays, MTI radar displays, delay line cancellers, and advantages of range gating. There are also 20 blanks to be filled in with radar related terms. The exam tests knowledge of key concepts and components in radar systems.

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567 views2 pages

Radar Bits

The document contains a 10 question objective exam about radar systems. The questions cover topics like angular error, transversal filters, coherent detectors, PPI displays, amplitude spectra of matched filters, universally used radar displays, control signals for parallel feed arrays, MTI radar displays, delay line cancellers, and advantages of range gating. There are also 20 blanks to be filled in with radar related terms. The exam tests knowledge of key concepts and components in radar systems.

Uploaded by

venkiscribd444
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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RADAR SYSTEMS

Objective Exam

1. The difference between target position and the reference direction is called [ ]

A) Lobe error B) Tracking error C) Angular error D) Sequential error

2. Transversal filter is also called as [ ]


A) Feed forward filter B) no recursive filter C)finite memory filter D)all

3. The coherent detector is uses both and [ ]


A) Frequency, amplitude B) phase, amplitude C) frequency, phase D)none

4. In PPI display objects in plan position with and [ ]


A) Range, azimuth B) in polar (rho, theta) C) range, time D) a&b

5. The amplitude spectrum of a matched filter is [ ]


A) Obtained by its frequency response B) negative of amplitude spectrum of input signal
C) Same as amplitude spectrum of signal D) depends on phase of the signal

6. The universally used radar display is [ ]


A) PPI B)CRT C)A Scope D)none

7. AN M×N two dimensional parallel feed array requires control signals [ ]


A) M+N+2 B)M+N C)M+N-2 D)none

8. In MTI radar which of the following is produced with time and butterfly effect on the ‘a’ scope [ ]
A) Fixed Targets B) Noise C) Moving Targets D)Phase Detectors

9. Delay line canceller causes speeds in MTI radar [ ]


A) Low B) high C) blind D) none

10. The range gating is necessary to perform automatic tracking offers several advantages. One of them is[ ]
A) Power enhancement B)S/N improvement C)accuracy is tracking D)none

Cont…..2
line produces a time delay equal to

II Fill in the 20. The relative target velocities which results in zero
MTI response are called
Blanks:

11.
radar determines the
path and predicts the -
future position of the
tangent

12. MOPA
stands for

13. The Doppler


tracking filter is
called as

14. A three or
four port device that
provides a separation
between transmitter
and receiver without
using duplexer

is called

15. Effective
noise temperature
Te=

16. The random


wandering of
apparent radar
reflecting centre
gives rise to

17. An
expression for phase
difference =Δφ for
phase comparison
monopulse is given
by

18. Matched
filter forms the cross
correlation between
the received signal
corrupted by noise
and a replica of the

signal.

19. The delay

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