JI3325 Array Antennas 10.0 credits

Gruppantenner

  • Education cycle

    Third cycle
  • Main field of study

  • Grading scale

    P, F

Course offerings

Spring 19 for programme students

  • Periods

    Spring 19 P3 (10.0 credits)

  • Application code

    61061

  • Start date

    15/01/2019

  • End date

    15/03/2019

  • Language of instruction

    English

  • Campus

    KTH Campus

  • Tutoring time

    Daytime

  • Form of study

    Normal

  • Number of places

    No limitation

Autumn 18 for programme students

  • Periods

    Autumn 18 P1 (10.0 credits)

  • Application code

    51698

  • Start date

    27/08/2018

  • End date

    26/10/2018

  • Language of instruction

    English

  • Campus

    KTH Campus

  • Tutoring time

    Daytime

  • Form of study

    Normal

  • Number of places

    No limitation

Information for research students about course offerings

Contact professor Lars Jonsson.

Intended learning outcomes

After the course the student shall be able to

  • Define and present relevant derivation for concept like unit-analysis of an array, active reflection coefficient, total active reflection coefficient, active radiation pattern, mutual coupling, array scan blindness, Floquet modes and edge effects.

  • Describe how phase shifts and time-delays are implemented in array antennas and how it affects the bandwidth of scanning. Explain concepts like beam squint.

  • Make an array antenna radiation pattern synthesis both analytically and with numerical methods, optimizing for different features of the radiation pattern. 

  • Derive relevant expression for measurement of signal direction with monopuls radar for different kinds of arrays.

  • Implement the summation of active element pattern in Matlab, and to derive their respective normalizations. They should also compare and use Ludwigs three definitions of polarization.

  • Describe limitations of array antennas. Explain concepts like super directivity, array figure of merit, end fire.

  • Define concepts like lobe widening, scan impedance and scan loss, excitation efficiency.

  • Calculate the antenna parameters like radiation patterns from reflector antennas, leaky wave arrays based on array theory.

  • Explain different practical methods to feed arrays. Define concepts like digital arrays, integrated arrays and connected arrays, and understand the challenges in this type of arrays.

Course main content

Array antennas, electromagnetic field theory, advanced antennas, measurement of signal direction, electromagnetic calculation, radar.

Disposition

The course consists of lectures, literature studies, seminars, laborations and project works. The distribution between the parts is as follows:

Seminars, literature studies, seminars: 5hp.

Laboration: 2hp.

Project work: 3 hp

Eligibility

The course expects advanced knowledge within the area of electromagnetic fields. It is most desirable that the student has knowledge about techniques needed for RF- and microwave-techniques, and a solid ground in engineering mathematics. Students with an MSc exam in telecommunication, electrical engineering, or electronics engineering or physics should have the required background.

The course EI3204 in Antenna Theory, PhD Course is a required prerequisite. It is an advantage if the course EI3200 in Electromagnetic Theory, PhD course is passed.

Literature

The course is based mainly on two books below in combination with a large number of research articles:

  • R. C. Hansen, Phased array antennas, 2009
  • R. J. Mailloux, Phased array antenna handbook, 2005

Required equipment

The students will use computers in the ETK lab and thus have access to CST Microwave Studio och Matlab.

  • CST Microwave Studio is a commercial software that enables simulation of antennas and other microwave devices.

  • Matlab is used to develop scripts and for simulation of array antennas.

Examination

  • EXA1 - Examination, 10.0, grading scale: P, F

Requirements for final grade

  • Written report/oral presentation of the laboration.
  • Solved exercises on the theory part.
  • Each student is responsible for a 30 minutes seminar for the other students (and interested members of the department). Participating students also have to act as opponents on the presentation. This is part of illustrating knowledge of the theory.
  • Presentation of the result from the project work. Here the presentation comes as a technical report.

Offered by

EECS/Electromagnetic Engineering

Contact

Lars Jonsson

Examiner

Lars Jonsson <ljonsson@kth.se>

Version

Course syllabus valid from: Spring 2019.
Examination information valid from: Spring 2019.