Advanced Electronics

Coventry University Version 3.2 Faculty of Engineering and Computing

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Coursework cover sheet – be sure to keep a copy of all work submitted Submit online via Moodle

Submit through Moodle as a pdf document naming the file name with your student identification number (eg 1234567.pdf).

Section A - To be completed by the student – PLEASE PRINT CLEARLY

Family Name(s)

Module No.

301CDE

Forename(s)

ID Number(s) (from your student card)

Time taken (hrs) (per student for group coursework)

Lecturer

Daniel Lim Submit Moodle Assignment by:

16 OCT 2019 23:00hr

Module Code and Title

Advanced Electronics (AE) Assignment No. / Title

FM Radio Transmission Design Estimated Time (hrs)

20 Assignment type:

Individual % of Module Mark

25 Hand out date:

2 Oct 2019

No late work accepted. Extensions allowed only in extenuating circumstances. It is important that the work submitted is an individual effort. The penalties for plagiarism are severe. Full details on Faculty coursework policy and procedures are available at https://students.coventry.ac.uk/EC/Pages/Procedures.aspx

Section B - To be completed by the assessor

Intended Learning Outcomes assessed by this work. Design, analysis and calculation of filter design, RF power amplifier, matching network (IMN & OMN) using smith chart, antenna matching, power calculation, Free space path loss (FSPL) estimates from Transmitter system to receiver device, layout considerations, practical components selection and complete circuit design. Marks breakdown / Marking Scheme Max Awarded

Overall transmitter system - explanation 5%

Bandpass filter(BPF)design 15%

Input matching network(IMN) design using smith chart 15%

RF power amplifier design 15%

Output matching network(OMN) design using smith chart 10%

Antenna matching transformer 10%

Power calculation from output of mixer to transmit antenna chain 10%

FSPL to the receiver input calculation 10%

Consideration for parasitic capacitance/inductance, PCB board layout considerations, practical component values selection

5%

Final complete circuit design with all values specified from output of the up-converter mixer to the antenna

5%

Note: Answer all questions. This is an individual assignment.

No copying is allowed. Student found to plagiarize may be referred to

the school for action and zero marks will be awarded for both students.

Assessor’s signature / initials:

Date: 13 Feb 2019

Total 100

Total

Coventry University Version 3.2 Faculty of Engineering and Computing

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Signed internal moderator:

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Coursework Task Sheet

Assessment Criteria

The work will be assessed by comparison with an approved marking scheme. Fully correct solutions will receive the number of marks indicated. Marks will be reduced for errors in proportion to their severity. You should indicate the units for all your results. Please present your work clearly showing all appropriate equations used for calculations and indicting all the steps needed to get the final answers.

Retain at least 2 digits after decimal point.

Coventry University Version 3.2 Faculty of Engineering and Computing

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1 FM Radio Transmission System

Figure 1 shows a typical RF radio transmission station and Figure 2 shows a typical RF Radio Receiver Device. The transmission station, as shown in Figure 1, up-convert audio frequency into a much higher frequency for long distance broadcast of up to 120km. It has one-stage up-converter mixer with a local oscillator, two bandpass filter, two RF matching network and one matching transformer terminated with the RF transmission antenna. The receiver device, as shown in Figure 2, down-convert RF frequency to audio frequency. It has a low-noise-amplifier (LNA), one bandpass filter(BPF), one lowpass filter(LPF), one down-converter mixer with local oscillator, a pre-amplifier and an audio amplifier. The transmit antenna has a gain, Gt, of -0.6dBi and the receive antenna has a gain, Gr, of +0.5dBi The receiver sensitivity of the receive section to ensure the circuit to function well requires a minimum of -65dBm while the transmitter have a maximum transmit power of 25dBm. Each student is required to design using different FM radio frequency channels from 88MHz to 108MHz. The design, analysis, explanation and calculation to include the following:

a. Overall transmitter system explanation b. Bandpass filter (BPF) design c. Input matching network (IMN) design using smith chart d. RF power amplifier design e. Output matching network (OMN) design using smith chart f. Antenna - matching quarter wavelength transformer g. Power calculation from output of mixer to transmit antenna chain h. FSPL to the receiver input calculation i. Consideration for parasitic/stray capacitance/inductance, PCB board

layout considerations, practical component values selection

Coventry University Version 3.2 Faculty of Engineering and Computing

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j. Final complete circuit design with components values specified from output of the up-converter mixer to the transmit antenna.

Suggest a practical approach of the implementation. Consideration of using real world practical components for implementation is needed. RF amplifier chosen need to have the S-parameter given in the datasheet. Also take into considerations the stray capacitance and stray inductance present in physical layout of the PCB traces and component placement. Students could also discuss about the various signal fading experienced by FM radio broadcast including passing object such as car, building blockage, etc. State any assumption used clearly and explain why such assumption is used.

Note: it is very important that the work submitted is an individual effort. The penalties for plagiarism are severe.

The Faculty Policy on Assessed Coursework applies to this coursework. You are advised to read the guidelines available on the general Faculty CU online web site.

Keep a safe copy of all coursework submitted for reference.