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In this paper a novel of a double — T microstrip antenna, which consists of two T — shaped monopoles is presented. The proposed antenna gives a two bandwidth eg. for wireless local area network (WLAN) operations, with bandwidth of 2,2–2,6 GHz and 5,6–5,9 GHz for S11 < 10dB (WFS < 2). The proposed antenna has o low profile and can easily be fed by using 50 Ω microstrip line. Good radiation characteristic...
Intensive development of cellular personal communications system has been observed lately. Thus, protection of a man, and especially protection of his head against non-ionizing electromagnetic radiation generated by cellular telephones is becoming one of the most important problems. The results of elaborated microstrip antennas which have minimized radiation towards the user's head are presented in...
The present paper described a method of analysis that can be applied to these geometries, as well as related configurations. The paper presents a model of the antenna on which the simulation was conducted on the impact parameter on bandwidth. The influence of the changes of the value of these parameters of individual layers on the bandwidth was talked over. Paper shows the analysis of multilayer microstrip...
The article concerns problems connected with measuring shielding effectiveness of small shielded chambers. In the article the measuring procedure and the position for measuring shielding effectiveness of small shielded chambers have been described. Particular attention was paid to maximization of dynamics in measuring attenuation of shields through minimization of noise level in measuring receiver...
The article concerns problems of electromagnetic compatibility of portable computers. Its aim is to present a sample position application and methodology of measuring shielding effectiveness of a casing used for shielding of portable computers of laptop type in the frequency range from 10kHz to 1GHz. In the article the measuring methodology and a detailed description of the position for measuring...
The article concerns problems of electromagnetic compatibility of contemporary IT devices. Particular attention was paid to undesirable emissions, which are by products generated unintentionally during realization of basic functions of device. In the article the methodology of measuring conducted emission on supply terminals of IT devices according to the PN-EN 55022:2006 standard in the frequency...
The present paper described a method of analysis that can be applied to these geometries, as well as related configurations. The paper presents a model of the antenna on which the simulation was conducted on the impact parameter on bandwidth. The influence of the changes of the value of these parameters of individual layers on the bandwidth was talked over. Paper shows the analysis of multilayer microstrip...
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