Contacting Radar Questions What is the principle of operation of Guided Wave Radar ? (b) Define noise bandwidth of a radar receiver, How does it differ from 3-dB bandwidth? 38. 6. (a) Receiver protectors (b) Passive TR limiter (c) Low noise front ends. 37. (a) Explain the operation of sinusoidally modulated FMCW Radar extracting the third harmonic with neat block diagram. Derive the impulse response of a matched filter that is commonly used in a radar receiver? (a)Describe briefly various visual displays to view radar echo signals in radar systems. (a) Write short notes on matched filter? A pulsed radar operating at 10GHz has an antenna with a gain of 28dB and a transmitter power of 2KW . Write explanatory notes on: Radar cross-sectional area of the target = 20 sq.m. 4. What are blind speeds? (c)Why most of the radar receivers are considered as envelop detectors while calculating the SNR (April, 2008) What are some of the ways in which it manifests itself? A: Radar is acronym for Radio Detection and Ranging. April 2012 Suggest a method to reduce the effect of blind speeds for unambiguous detection of a moving target. Healthcare employers tend to lean towards asking behavioral-based interview questions. 23. (b) Compare and contrast the situations with a power amplifier and a power oscillator in the transmitter of an MTI system. 7. (Jan. 10) Explain the principle and characteristics of a matched filter. (a) Draw the block diagram of a pulsed radar and explain it’s operation. (b) Explain how AGC is achieved in conical scan? Explain the basic principle of elementary form of Radar. (a) Obtain the radar equation and discuss various parameters which improve the performance of radar. Suggest the appropriate isolator. May/June ‘09 34. (April/May 2012) 12. What are Maxwell's Equations? (b) How to find the number of pulses that returned from a point target as the radar antenna scans through its beam width? 2. (b) Why does tracking radar have poor accuracy at low elevation angles? Top 100 PHP Interview Questions and Answers . (b) With diagrams explain split-range-gate tracking April 2012 (b) Calculate the lowest blind speed of an MTI system operating at 4.2 cm wavelength and transmitting at a pulse repetition time of 286 μS. (b) Write about Phase-Comparison Monopulse Radar? 3. (a)Derive the equation for minimum detectable signal Smin in terms of output signal to noise ratio? 18. Question 15. Radar level measurement technology can be broken down into two different categories; Pulsed and Frequency Modulated Continuous Wave ().An advantage with Pulsed Technology is … What limitation might there be in using double-conversion receiver? 21. 18. (b) Explain the need for a bank of narrowband filters in FMCW radar. Download PDF. 2. (May 2008 & April/May 2008) (b) Target cross section σ (January 2010) (b) Derive the range equation and discuss about its limitation (May 2008) %���� 19. Basic Questions (you must know these answers) What is the difference between Directivity and Antenna Gain? (b) Explain the principle of operation of phase comparison Monopulse tracking radar? (a) What is a Radar? (April 2011) 31. 15. 12. (c) Discuss the application of electrostatic storage tubes in MTI radar. 19. (a) Derive the Radar range equation. 7. Explain. (a) With an MTI Radar system we can get the radial velocity as well as the distance of the moving target. 4. an 8GHZ Police radar measures a Doppler frequency of 1788HZ from a car approaching the stationary police vehicle in an 80 km/h speed limit zone .what should the police officer do? (b) Transmitter power (May 2008) Justify this. 3. (a) Discuss about staggered pulse repetition frequencies? (b) Explain the applications of radar. Keep it mostly work and career related. (a) Explain the principle of operation of MTI radar with power amplifier transmitter with neat block diagram? Give the mathematical equation for it, and explain each parameter. Explain the function of each block. 23. This is the easiest way to answer sales interview questions when you have no experience. (April/May 2012) Sample Interview Questions with Suggested Ways of Answering Q. Apr 11 Get the job you want. (b) What is butterfly effect? Download PDF. As promised, you can have this list of most common interview questions and answers as a PDF so that you can use it or share it as you like. PHP is a web language based on scripts that allow developers to dynamically create generated web pages. (a) Passive ECM. (Apr/May ’12) 5).Explain about sequential Lobing Keep it mostly work and career related. 14. (a) Explain the characteristics of a matched filter receiver, with necessary equations. Why do you want to work in this industry? (b) Substantiate the requirement of duplexers in efficient radar systems. (a) Establish the impulse response characteristic for a matched filter. Can you tell me a little about yourself? 2) Explain the block diagram of amplitude comparison monopulse radar for single angular coordinate and explain its operation (a) Description of Range gate Doppler filters. 3 0 obj (a) What is the method of overcoming the problems of blind speed in analog radars? 18. (January 2010) 21. (a) With the help of a suitable block diagram, sequential lobing type of tracking technique in a tracking radar system? 21. (b) Write about multiple frequency CW radar? Discuss the effect of large wavelength and large PRF on lowest blind speed of target. ��+;�sXhW�v� b�r�23^b>"x���o� ~�I��6���^A� �޷� �u��ok����/���� qNJQWhM�3�(�!o�z�v��������k^կ�x��]�^c��i5$��+=.z=��/� 'u�����w��Ɵ�iW�E��&��{P�M&�f�s�h�*��y�]궶�� ze���q�eV�9�&��b�GVխt�t��4�8�]�#z(�Q�:ݦ��$K43�@���"g�EU�⹥E5]]C+SЃ��$C��wNz��RnP�w ǜg�7���@E4��Xn���������y叝2@�p��>����k��.�uot�Wq�(�"�OjvasZ���j��V�r�=�ݱV�?-��r�9�[jV�7��q����0���Q`.QHH0 � ���Z������2����=��EP���ZIkp���a�z��MV4�T��%�+*������5��j�� �f�ut�?�3�N����a�;�{k�C8�{�z�4.��%�i�VR�q�F+��� �3��"B�ed~H�^�� (May 2008) Here are a set of actual antenna engineer interview questions, to give you an idea. Draw the block diagram of a correlation receiver and explain its operation with necessary equations? (April/May 2012) 2. What are the methods that provide isolation between transmitter and receiver? (November 2008) (b)What are effects of receiver bandwidth in CW radar? What is the impedance of a dipole antenna? Explain the following limitations of MTR Radar 36. (b) A pulsed radar operating at 10 GHz has an antenna with a gain of 28dB and a transmitter of 2 KW (pulse power). (a) With the help of a suitable block diagram explain the operation of a CW Doppler radar in a sideband super heterodyne receiver. 2. (b) Write about the following (i) Coherent detector (ii) Likelihood-ratio receiver (January 2010) Why do you want to leave your current job? %&'()*456789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz��������������������������������������������������������������������������� 2).Explain various types of radar displays (b) Radiation patterns and feed arrangements for array antennas in a radar system. (a) Discuss Radar CRT phosphor characteristics. (a)Draw the block diagram of a simple CW radar and explain the working of each block? Your questions depend on the kind of person you going to hire. (November 2008) (b) List all the possible losses in a radar system and discuss the possible causes of each of them (November 2008) Electronics and Communications Engineering Interview Questions; Question 13. Derive the range equation and discuss about its limitations Explain about radar cross section of targets. 12. (b) What are the peak power and duty cycle of a radar whose average transmitter power is 200W, pulse width of 1μs and a pulse repetition frequency of 1000Hz? Here are some of the most common Radar job interview questions and answers to prepare yourself. Write notes on the following: 11. (b) Explain the necessity of a matched filter in radar receiver to improve its signal to noise ratio based on frequency response characteristic of the matched filter. (b) With a block diagram explain the operation of pulse radar. Q. 3).Explain the characteristics of a cross –correlation receiver with a block diagram How have the drawbacks of the basic CW radar been overcome? (b) What are the basic functions of radar? (b) Describe the effect of sinusoidally modulating signal in the place of rectangular pulses on the performance of a radar. 22. January 2010 RADAR SYSTEMS Questions and Answers pdf free download :-UNIT – 1 :-1. (b) Applications, advantages and limitations of phased array antennas in a radar system. 2. (a) Displays for visual presentation of radar echo signal. <> What is the maximum range of the radar? (a) Derive the transfer function for matched filter? (b) Compare the performance of MTI with pulse Doppler radar? Answer : Radar Tester related Frequently Asked Questions by expert members with job experience as Radar Tester. (May 2008) (November 2008) (May/June 2009) (May 2008, April/May 2007) endobj 1).Explain the characteristics of a matched filter receiver with necessary equations 3).Three networks units ,each of 6db noise figure and 10db, 6db and 3db gains respectively are cascaded.Determine the Overall noise figure of the system. (Apr/May 07) 9. (b)Explain about transmitter clutter. 17. 7. (a) Compare the tracking techniques? (Nov2008) (c) North filter. (b) Explain about Color CRTs. 7. (May 2008) 4. From obvious questions such as ‘why do you want to work for us?’ to weird and wacky ones like ‘if you were an animal what would you be?’, you’ll have a head start with the best answers. Training questions. (a) Explain the functioning and characteristics of PPI display and A-Scope. Suggest the appropriate isolator. (a)Explain about the Doppler effect? Draw the block diagram of pulse radar and explain the function of each block and its operation? (b) Explain in detail about limitations of tracking accuracies? (June 2006) May/June 2009 (April/May 2008) How many techniques are employed to track a radar target? 12. 8. (a) Discuss about the internal fluctuation of clutter which limits the performance of MTI Radar. January 2010 It uses electro-magnetic waves in microwave region to detect location (range & direction), height (altitude), intensity (in case of weather systems) and movement of moving and non-moving targets. (a)Describe and distinguish between the different types of ECM directed against radar. c (a) Discuss in detail about the amplitude fluctuations and how its effects are minimized (a) What is the chief advantage of automatic detection and tracking? 26. (November 2008) Important questions on microwave engineering with answers and pdf, learn about applications, Junctions, S-matrix, Microwave analysis, reflex klystrons. 19. Write short notes on: (a) Explain the principle of Doppler effect and its application in CW Radar. 23. Subject: Frequently asked questions on radars and their answers. Give reasons. (June 2007) 10. (a) Explain how FM-CW radar is used to find the height of the aircraft above the surface of the earth? 5).Explain about matched filter with non –white noise. What is the distinctive feature that makes the MTI radar and Pulse Doppler to differ ? Tell me about yourself. (b) How blind speeds can be controlled by using staggered PRF? 2011) (b) Advantages, limitations and applications of antenna arrays in radar systems. 2) Enumerate the advantage of the time delay line canceller as compared to the convention frequency domain filter. 25. 14. endobj 14. (b)Describe methods to achieve isolation between transmitter and receiver of a CW Doppler radar if same antenna is to be used for transmission and reception. 2).Explain about matched and non –matched filters (i) Branch type duplexer. (a) Draw the block diagram of IF Doppler filter bank? 18. (a) What is a matched filter receiver? $4�%�&'()*56789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz�������������������������������������������������������������������������� ? a)noise figure b)noise temperature c)system noise (b) Loss in gain of cosecant squared antennas. 20. What are its radar applications? (January 2010) What is the impedance of a dipole antenna? (Apr/May ’12) Here's the deal: Don't give your complete employment (or personal) history. Tools. Cover Letter Builder Write a … If it is defined to detect a target with a cross section of 12 sqm and the minimum detectable signal is -90dBm. (b) Write about CRT screens for display in radar systems. (b) Explain how isolation between transmitter and receiver of a radar system can be achieved if single antenna is used for transmission and reception. (b) Explain and distinguish between different ECCM options. 8. In answering these questions perhaps you could print out this page. This is a fairly straight forward question to handle. If you are human, leave this field blank. Our Top Ten Questions And Answers for Sales Interviews (January 2010) Explain your answer. 8. By planning and practicing your answers, you can boost your confidence and increase your chances of getting the outcome you want. 28. List the merits and demerits of Monopulse tracker over conical scan type tracker? (January 2010) �� � } !1AQa"q2���#B��R��$3br� (a) Beam steering and variations in beam width with variations in steering angle of an antenna array system. Explain the basic principle of elementary form of Radar. What is meant by minimum detectable signal in radar. (May/June 2009) Just like with cars you have a factory and people that repair the factory. (April/May 2012) A Radar job interview is one of the most challenging interviews, So, it is essential that you anticipate and prepare for the questions that might be asked of you. (b)The average false alarm time is a more significant parameter than the false alarm probability. 6. 26. 4. (Nov 2008) ;-)) How to Answer Amazon Interview Questions. (b) Compute the maximum detectable range of a radar system specified below: (c) Describe the method of staggering pulse repetition frequency to reduce the effect of blind speeds in an MTI system? What is the maximum range of the radar? Explain? 6. (Jan. 2010) (a) Derive the maximum range for a Radar system, from first principles. (a) Explain about Split-range-gate tracking ? 29. Why is amplitude comparison Monopulse is likely to be preferred over the phase comparison Monopulse and conical scan tracker over sequential lobing, or lobe switching, tracker? (c) Describe a method for beam steering of a phased array antennas. (b) Explain any two types of mixers. Required fields are marked *. 2. (a) Discuss about efficiency of non matched filters? (a) Visual Displays to view radar echo signals in all types of radar systems. 22. Write explanatory notes on: (i) Pulse repetition frequency and range ambiguities 16. 5. (November 2008) (b) Explain about AGC in tracking radar receiver? 6. The reasonable time to frame the answers is about 30 minutes. 6. (b) Determine the Range and Doppler velocity for a FM-CW Radar if the target is approaching the Radar. (a) Describe the conical scanning method? (a)Range and Doppler measurement of a target using a FM-CW radar. 16. What the corresponding frequencies? (April/ May 2012) (a) Aperture illumination and efficiency of radar antennas. (i) Low angle tracking (ii) Tracking in Range (iii) Acquisition May/June 2009 (ii) Balanced type duplexer. (April 2011) 22. 5. (May 2008) 10. Explain the operation of CW radar with neat block diagram Operating wavelength = 3.0 cm 2011) 7. (a)Explain how the noise is limiting the Radar receiver sensitivity? 35. 5. It's your chance to introduce your qualifications, good work habits, etc. Determine the radial velocity component as measured by the radar? 6. If it is defined to detect a target with a cross section of 12 sqm and the minimum detectable signal is Pmin = -90dBm. (b) Calculate Doppler frequency shift (fd) when the relative velocity of target with respect to radar is 50 knots at a transmitted frequency of 80 MHz. Explain the operation of CW Doppler radar non zero IF with neat block diagram. 4)Derive and explain the efficiency of non-matched filters (a) Expand Radar? Why do you want to leave your current job? (a) Draw and explain block diagram of Conical scan tracking radar (b) Calculate the lowest blind speed of an MTI system operating at 3.6 cm wavelength and transmitting at a pulse repetition time of 330 μS (a) Explain phase comparison Monopulse tracking radar. Your email address will not be published. (b) Discuss about matched filter correlation function? (b) Three network units, each of 6 dB noise figure and 10 dB, 6 dB and 3 dB gains respectively are cascaded. Top 10 surveillance interview questions with answers In this file, you can ref interview materials for surveillance such as, surveillance situational interview, surveillance behavioral interview, surveillance phone interview, surveillance interview thank you letter, surveillance interview tips … 8. >>Ready to pursue even bigger opportunities? (a) Draw the block diagram and explain the operation of CW Doppler radar using an intermediate frequency in the receiver. (April/May 2012) Explain the principle of Doppler effect and its application CW radar. (May/June 2009) Discuss how the direction and range of an object is determined using this system. Calculate the first two lowest blind speed for this radar. (Apr/May 07) A list of common job interview questions and answers—right and wrong—with expert tips. (a) Write notes on (i) noise figure (ii) noise temperature 3. (April/May 08), 1. 19. (b) Explain the necessity of a matched filter in a radar receiver to improve its signal-to-noise ratio based on the frequency response characteristics of the matched filter. (b) Write about the frequencies that are used for Radar Communications? (a) List out the possible errors for measurement of altitudes accurately using a FM-CW radar. (a) Explain how the radar is used to measure the range of a target? (May 2008) (b) Describe briefly the analog MTI systems. (Apr 12) 2 0 obj (a) What is the purpose of filter banks in CW radar receivers? (a) Describe the working principle of pulsed Radar System. Review the responses and consider how you would answer the questions, so you'll be prepared to give a strong answer. 5).Explain about Phased Array Antennas. (May/June 2009) (a) Draw the diagram of a Basic Radar System and explain the operation of each block in detail. Explain how the power received by the Radar is related to the cross section? (a) What is False alarm and probability of detection? How to get hired by nailing the 20 most common interview questions employers ask. (a) Describe a pulsed Radar System. (April/May 2008) (a) Compare the performance of simultaneous lobing technique with conical scanning techniques? (a)Explain the principle and process of correlation detection (b) Explain the necessity of a matched filter in a radar receiver to improve its signal-to-noise ratio based on the frequency response characteristics of the matched filter. Illustrate the concept of blind speeds based on the frequency response of a single delay line canceller? (b) Describe the operation of multiple frequency CW radar? (January 2010) What are the main types of antenna polarization? 16. (a) An MTI radar is operated at 9GHz with a PRF of 3000 pps. (a) What are the different range of frequencies that a radar can operate and give their applications? 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