ECE: Electrical & Computer Engineering
Accredited by ABET
Undergraduate Programs

ECE 4605 Radio Engineering


Spring 2014 textbook list

The Spring 2014 ECE textbook list is available online for students.

Current Prerequisites & Course Offering

For current prerequisites for a particular course, and to view course offerings for a particular semester, see the Virginia Tech Course Timetables.

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ECE 4605 Radio Engineering (3C)

Wireless application circuit design for gain and filter control at radio frequencies to interface the baseband processing systems and the antennas of communiation systems. 4605: Design of radio transmitter and receiver circuits using scattering-parameter methods. Circuits include oscillators, radio frequency amplifiers and matching networks, mixers and detectors. 4606: Design of amplitude, frequency, and pulse-modulated communication systems, including modulators, detectors, and the effects of noise. Design basics and guidelines for phaselocked loops and several power amplifier configurations.

What is the reason for this course?

The first course provides a thorough coverage of fundamental communication circuits. These circuits are the building blocks of modern communications equipment used for commercial radio and TV systems as well as modern wireless system, including cell phones.

Capstone Technical Elective for EE; Technical Elective for CPE. Typically offered: Fall. Program Area: Communications.

Prerequisites: C- or better in 2014, 3106, 3204, 3614. Co-requisites: 4675.

Why are these prerequisites or corequisites required?

3106, 3204, and 3614.The necessary background consists of devices, biasing, and basic low frequency amplifiers concepts, as well as some basic transmission line and Smith chart principles. A student should be able to bias a transistor circuit and analyze its basic low frequency performance. They should also be able to analyze basic networks and their general frequency performance (as covered in 3204). It is critical that they have a basic understanding of 2-port equivalent circuits and related modeling as presented in 3204 and prerequisites. They should also be able to model short sections of transmission line as corresponding inductors and capacitors as well as represent impedance transformations on the Smith chart as covered in 3106. The basic concepts of AM and FM as covered in 3614 as assumed as the basis of discussing the circuit implementation of the circuits. The co-requisite is the laboratory component of this class -- an integral component of the lab and lecture combination (4605 and 4675 are co-requisites for each other). 4605 is a prerequisite for 4606 as denoted by the numbering scheme. Much of the material of 4606 is based on the design and processes presented in 4605.

Department Syllabus Information:

Major Measurable Learning Objectives:
  • design a radio frequency amplifier using S-parameter techniques;
  • design RF oscillators using developed principles and predict performance;
  • organize and write technical reports
  • organize and make technical presentations

Course Topics
Topic Percentage
Communication systems/modulation 2%
Impedance matching - q method and 15%
modern network concepts
Network parameters - Y- and S-parameters 6%
Signal-flow graphs 7%
Small-signal amplifiers - S-parameters 15%
Stability circles and conditions 10%
Noise modeling and characterization 10%
Computer aided design 5%
Nonlinear device modeling 10%
Multipliers 3%
Oscillators 12%
Mixers 5%

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