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This article is aimed on presentation of innovative multimedia textbook of electromagnetic waves and microwave technology intended for students and specialists in the field. To maintain the current content mediated through modern form the innovation is necessary. Meeting this challenge is the scope of the project 100/2009 under University Development Fund.
In recent years, the number of publications dealing with the use of electromagnetic band gap (EBG) structures in antenna engineering has been increased rapidly. However, there is only a few papers describing the pros and cons of different EBG structures. In this contribution, a comparative study of planar versus volumetric EBG structure is presented. The emphasis is placed on the ability of the EBG's...
A proper construction of Green's functions for planar electromagnetic structures is the foremost task in the numerical analysis of microstrip antennas using integral equation techniques. In the paper, Green's functions for a planar structure are formulated in the frequency domain and in the time domain. In the frequency domain, Sommerfeld type integrals are involved, and in the time domain, the Cagniard-de...
This paper deals with modeling of the ultra-wideband planar antennas with coplanar feeding in the commercial available programs. After a brief summary of the basic principles of high-frequency structures modeling, a specific design of wideband antennas on two different substrates is shown. The antennas are modeled in CST Microwave Studio and Zeland IE3D. Simulation results are compared to measured...
A method of enforcing a patch antenna to operate in multiple frequency bands is described in the paper. The original approach consists in etching multiple U-shaped notches to the patch, which divide the rectangular antenna element to sub-radiators. Changing dimensions of sub-radiators, the antenna can be tuned to resonate on required frequencies.
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