Unit Outline

The unit extends the physics of electrical phenomena when wavelength is small relative to system physical dimensions. The unit introduces an analysis and design, as well as phenomena encountered when wavelength is short relative to the physical dimensions of an electrical system. The student will study signal and current wave propagation along conductors in electrical structures. This study will lead into an introduction to transmission line theory, dealing with the distributed nature of circuits and systems when propagation delays are significant. Concepts such as reflection coefficients, impedance transformation and Smith charts are studied. Based on transmission line theory, multiport networks are introduced and studied. This includes S-parameters, Z-parameters and signal flow graphs, which makes the analysis and design of networks possible. The modelling of active high frequency components are also considered, including diodes, junction transistors and field effect transistors. Matching networks are studied (to enable maximum power transfer and reduce standing wave ratios). This includes discrete component matching networks (T and PI networks) and microstrip line matching networks. High frequency transistor amplifiers are studied, which include high frequency biasing, stability, gain, noise figure and multistage amplifiers. Finally, oscillator design will be investigated with non-linear effects such as higher order distortion.

Intended Learning Outcomes

As per the Assessment and Results Policy 1.3, your results will reflect your achievement against specified learning outcomes.

On completion of this unit, you will be able to:


1	Analyse high-frequency propagation, standing wave ratios, distributed impedance and reflections by applying transmission line theory and Smith charts.
2	Analyse electrical structures where active components require high-frequency modelling, and propagation delays are not insignificant
3	Design high frequency multiport circuits using S and Z parameters, as well as signal flow graphs.
4	Design high-frequency multistage amplifiers, including the case where the amplifiers require impedance matching networks.

Requisites


REQUISITE TYPE	REQUISITES
Pre-requisite	ENG332 Signals and Linear Systems and ENG331 Control Systems 1 and ENG231 Electrical Machines and Transformers

Alterations as a result of student feedback

How will I be Assessed?

For more detailed assessment information please see MyLO.

Assessment schedule


ASSESSMENT TASK #	ASSESSMENT TASK NAME	DATE DUE	WEIGHT	LINKS TO INTENDED LEARNING OUTCOMES
ASSESSMENT TASK 1:	Semester test 1	Week 8	20 %	LO1, LO2
ASSESSMENT TASK 2:	Design Report	Week 11	30 %	LO1, LO2, LO3, LO4
ASSESSMENT TASK 3:	Exam	Exam Period	30 %	LO1, LO2, LO3, LO4
ASSESSMENT TASK 4:	Assessed tutorials	Refer to Assessment Description	20 %	LO1, LO2, LO3, LO4

Assessment details

Assessment Task 1: Semester test 1

TASK DESCRIPTION:

2-hour written invigilated test covering the first half of the unit's content.

TASK LENGTH:

2-hour invigilated closed book test

DUE DATE:

Week 8

WEIGHT:

20 %

CRITERION #

CRITERION

MEASURES INTENDED LEARNING OUTCOME


1	Solve problems relating to propagation properties of high frequency waves.	LO1
2	Produce analytical expected responses of high frequency active components.	LO2

Assessment Task 2: Design Report

TASK DESCRIPTION:

A take home assignment will be provided, where a typical real world problem is described. A detailed report with analysis results are submitted. Students can work in groups of up to two. A RF circuit will be designed and integrated with the transmission line where reflected waves propagate. Students will have to mitigate all the impairments due to reflections. This will be performed making use of S and/or Z parameters, as well as signal flow graphs.

TASK LENGTH:

Written report - 10 page maximum (appendices excluded)

DUE DATE:

Week 11

WEIGHT:

30 %

CRITERION #

CRITERION

MEASURES INTENDED LEARNING OUTCOME


1	Calculate standing wave ratio and reflection coefficients	LO1
2	Verify that correct models are used for active components	LO2
3	Design a stable circuit that has required parameters including bandwidth, gain and stability margins	LO2, LO3, LO4
4	Check that correct models of amplifer components have been deployed.	LO4
5	Check that impedance matching has been achieved.	LO4

Assessment Task 3: Exam

TASK DESCRIPTION:

3-hour written invigilated exam covering all unit content.

TASK LENGTH:

3-hour exam

DUE DATE:

Exam Period

WEIGHT:

30 %

CRITERION #

CRITERION

MEASURES INTENDED LEARNING OUTCOME


1	Solve problems relating to propagation properties of high frequency waves.	LO1
2	Produce analytical expected responses of high frequency active components with emphasis on propagation delays.	LO2
3	Investigate and design appropriate multi-port circuits.	LO3
4	Design multistage amplifiers operating in the high frequency range.	LO4

Assessment Task 4: Assessed tutorials

TASK DESCRIPTION:

In these sessions students will solve a series of problems relating to the relevant covered in a week. These sessions will conclude with the student submitting their work for assessment

TASK LENGTH:

13x 1-hour tutorial sessions (weekly)

DUE DATE:

Refer to Assessment Description

WEIGHT:

20 %

CRITERION #

CRITERION

MEASURES INTENDED LEARNING OUTCOME


1	Investigate various aspects of high frequency wave propagation.	LO1
2	Model high frequency circuits using active components.	LO2
3	Investigate and design new systems operating at high frequencies.	LO3
4	Design multistage amplifiers operating in the high frequency range	LO4

How your final result is determined

To pass this unit, you need to demonstrate your attainment of each of the Intended Learning Outcomes, achieve a final unit grade of 50% or greater, and pass any hurdle tasks.

Submission of assignments

Where practicable, assignments should be submitted to an assignment submission folder in MYLO. You must submit assignments by the due date or receive a penalty (unless an extension of time has been approved by the Unit Coordinator). Students submitting any assignment in hard copy, or because of a practicum finalisation, must attach a student cover sheet and signed declaration for the submission to be accepted for marking.

Requests for extensions

If you are unable to submit an assessment task by the due date, you should apply for an extension.

A request for an extension should first be discussed with your Unit Coordinator or teaching support team where possible. A request for an extension must be submitted by the assessment due date, except where you can provide evidence it was not possible to do so. Typically, an application for an extension will be supported by documentary evidence: however, where it is not possible for you to provide evidence please contact your Unit Coordinator.

The Unit Coordinator must notify you of the outcome of an extension request within 3 working days of receiving the request.

Late Penalties

Assignments submitted after the deadline will receive a late penalty of 5% of the original available mark for each calendar day (or part day) that the assignment is late. Late submissions will not be accepted more than 10 calendar days after the due date, or after assignments have been returned to other students on a scheduled date, whichever occurs first. Further information on Late Penalties can be found on the Assessments and Results Procedure.

Review of results and appeals

You are entitled to ask for a review of the marking and grading of your assessment task if there is an irregularity in the marking standards or an error in the process for determining the outcome of an assessment. Details on how to request a review of a mark for an assignment are outlined in the Review and Appeal of Academic Decisions Procedure.