Elektro- och informationsteknik

Lunds Tekniska Högskola | Lunds universitet

ETIN50 Högfrekvensförstärkare



 Course material

  1. The textbook is written in English and consists of a compendium of 360 pages:
    "Radio Electronics", L. Sundstrom, G. Jonsson and H. Börjeson
  2. Exercises and lab manuals:
    "Radio Electronics, Exercises a Laboratory Experiment", L. Sundstrom, L. Durkalec and G. Jönsson
  3. Formulary:
    "Radio Electronics, Formulas and Tables", L. Sundstrom, G. Jönsson

The entire package can be purchased in printed form at KFS . The course material can also be downloaded without charge from the course material page.
Some of the material, such as example exams, copies of slides from the lectures and Smith charts will be available only in electronic form on the course material page.


The aim of the lectures is to give an introduction to and generate interest in the various parts of the course and to describe the main concepts and theories in more detail. It is recommended that before each lecture, read the corresponding section in the compendium. This increases the exchange significantly when you already during the lecture will be able to ask questions if anything is unclear. This in turn makes you well prepared for the exercises. Note that an additional lecture is scheduled in the first week.


The exercises include briefings mixed with individual work and discussions. To make the best exchange, it is important to come prepared for the exercises.

Mandatory Laboratory Work

The aim of the laboratory work is to connect theory with reality. Here is where you do measurements on various circuits such as amplifiers, oscillators etc. with the help of the spectrum analyzer and the network analyzer.

Several time slots for the laboratory experiments are scheduled and you must in advance sign up for a suitable time. The sign up is done at the home page. Note: If you can't attend the lab session you have selected you must inform the lab supervisor at latest when the session starts. There may be course mates that are waiting for a free seat.

To qualify for the lab you must in advance read the corresponding sections of the textbook and the lab manual. For each lab there are preparation exercises that should be solved before the lab session.
After each lab you should write down your results and experiences in a personal diary. The supervisor will at the next time ask to look in your diary to see if you understood the topic. A well-written diary can save a higher grade on the exam!

Mandatory Hand-In Assignments - 2 reports

The hand-in assignments are important parts of the course. They encourage continuous learning that is important in large courses.

The assignments are parts of the preparatory exercises for laboratory work. You must hand in your personal unique solution, but it is recommended to discuss and work on the problem with the other students on the course. The report shall be submitted on time. 


Although much of the theory and concepts will be discussed during the lectures, exercise hours and laboratory work, you must still read the course material carefully in order to pass the exam. Moreover, independently solving the problems is a very important element in understanding the course. Merely studying the solved example exams is not enough.

Computer Aids

It is often impractical to use a simple calculator for the analysis and design of circuits based on S-parameters and distributed circuits. In order to be able to focus on the knowledge imparted in the Radio Electronics course rather than having to devote time to time-consuming calculations, you should use MATLAB for some of the homework assignments. The department of EIT has developed the toolbox, "deslib", of MATLAB functions specifically for this purpose.

Example exams

Can be downloaded from the course material page.


Approved hand-in assignments and laboratory exercises are a requirement to be allowed to enter the examination.

The assessment is an exam of five hours. The requirements to pass the course are: two compelted hand-in assignments graded pass, four completed laboratory exercises, and a passed exam.

The exam is divided into six main problems, which can give a maximum of 30 points. The rating is as follows:

  • 5: 25-30 points
  • 4: 20-24.5 credits
  • 3: 15-19.5 credits

Aids allowed during the exam are:

  • Radio Electronics, Formulas and Tables (the red book)
  • Smith Chart (distributed at the exam)
  • Compass (recommended for Smith-chart)
  • Pocket calculator (not to be pre-programmed), support for complex numbers is recommended.

Re-exam may be an oral exam by appointment with the course coordinator.