Acoustic and Electromagnetic WavesLaajuus (3 ECTS)

Objective

The aim of the studies in physics is to provide the capabilities for the automation engineering student and graduate engineers needed to be able to use in engineering applications.

The students become familiar with the physical exploration of acoustic and electromagnetic waves and learn the necessary fundamentals for advanced professional studies. The students develop their studying and problem solving skills required in learning of natural sciences. The students are familiar and understand the concepts in geometric optics and optical fiber communications. Students understand propagation modes of radio waves. Students are familiar with the operation principles in the wireless communication networks. Students are familiar with the operation principles of basic antenna elements.

Students know what the physical laws related to acoustic and electromagnetic waves, geometric optics and radio waves are. They are able to solve problems and able to find new solutions to the new technical engineering applications in the future.

Content

1. Acoustic waves, sound waves, intensity levels, ultrasound, modes of ultrasound, electromechanical EMFI foils and sensors, . . .
2. Electromagnetic waves, propagation in RF- cables and open space, Poynting vector, intensity of electromagnetic waves, . . .
3. Wave optics, boundary effects, optical fibers, dispersion and damping in optical fibers, bandwidth and DWDM- applications, diffraction, interference in thin films, Rayleigh criteria of resolving power, geometric optics, spherical mirrors, thin lenses, optics of eye, optical devices, . . .
4. Radio waves, dipole radiation, diffraction for radio waves, antennas and directional gain, EIRP, wireless networks, Friis transfer range equation for radio waves, . . .

Qualifications

Basics of Mechanics and Electricity, Mechanics, Thermal physics and Electric field, Magnetism, Oscillations and Waves

Assessment criteria, satisfactory (1)

1. During completion of this course the student acquires basic knowledge of acoustics, sound waves and ultrasound. Understands the definition of intensity levels of sound waves in dB- scale.
2. During completion of this course the student acquires basic knowledge of electromagnetic waves and main applications.
3. During completion of this course the student acquires basic knowledge of operation of optical fiber information transmission. Is able to define damping of light signal in optical fiber. Is able to solve geometric optics exercise with a simple thin lens system.
4. Is able to understand the usage of radio waves in information transmission with wireless radio links,

Assessment criteria, good (3)

1. Is able to define the intensity levels for multiple sound sources. Is able to connect elastic and shear modulus properties of solid material to different ultrasound propagation modes.
2. Is able define intensity or electric field strength of electromagnetic wave using Poynting vector. Is able to take into account the dielectric coefficient effects on the properties of electromagnetic waves.
3. Is able to define the effect of different dispersions on the maximum amount of light pulses in time unit for information transmission. Understands the properties of SM-and MM- fibers and applications where these fiber types are used. The student knows the concept of wavelength multiplexing and DWDM.
4. Able to calculate the damping of radio waves between a transmitter and receiver antennas. Is able to take into account the directional gain in the transmitter and receiver antennas. Understands what EIRP is.

Assessment criteria, excellent (5)

1. Able to define the intensity level for several sound sources of different kind of directional areas. Is able to take into account the effect of diffraction and superposition of different sound sources. Is able to solve intensity levels with pressure waves of sound.
2. Able to solve intensities or electric field strength of electromagnetic waves with different directional gains and radiation areas. Is able to define the amplitude and time average values for oscillating electric and magnetic field vectors.
3. Is able to define using material dispersion in different wavelength channels maximum values for light pulses per time units in optical fibers. Is able to calculate a multi lens equation for solving the position of final image and magnification.
4. Able to define in wireless radio communication power values for transmitter and receiver antennas. In these calculations is able to take into account range damping, diffraction, duty factors and loss factors.