Gain experience of designing and analysing microwave communication systems.
A Digital Video Broadcasting (DVB) down-convertor consists of the following blocks.
You are development engineering and have been asked to undertake the following tasks:
A. Use appropriate measurement equipment to characterise each block as follows:
i. determine the LNA gain versus frequency and 3dB bandwidth
ii. determine the mixer’s conversion loss
iii. determine the filter’s frequency response and insertion loss
B. Design a band-pass filter with characteristics close to the one above
C. Use LTSpice to simulate the frequency response of your filter and verify how close your filter design is to the one above
D. Write a brief report on your findings.
Note that data sheets for each of the blocks can be found on the WWW. Practical sessions should be used to perform your measurements. Staff will be available to assist and guide you. You may undertake the measurements in small groups, but you final report must be entirely your own work.
Marking Scheme Please note that the technical report must be completed individually. This aspect is not group work, so no collaborative or cooperative work of any kind is allowed. If your answers (wording) are same (or mostly same) as someone else’s work then you and all others involved will be reported for plagiarism (see the front cover declaration you signed).
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