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In this paper results of a parametric study showing the advantages of using magneto-dielectric materials, in comparison with pure dielectrics, as substrate support for miniature printed antenna, are presented. Further to the reported widening of the frequency bandwidth, it is shown that for a given antenna size and resonant frequency, almost fixed by the refractive index n √rHrΠ of the material, increasing...
This paper introduces a new ultra-wideband (UWB) printed circular dipole antenna having a filtering feature for rejecting the Wi-Fi band (4.9-5.9 GHz). UWB regulation in Europe [1] and Japan require the rejection or the avoidance of the 5 GHz Wi-Fi frequency band, but due to the very wide frequency band used by UWB technology, it is also particularly exposed to other systems disturbances. Some experiments...
Compact 2.4 GHz WiFi printed antennas based on a ldquotwistedrdquo slot approach have been designed and integrated on a board taking into account isolation requirements with an existing DECT module (1.9 GHz) for simultaneous WiFi and DECT operations. The obtained isolation between WiFi and DECT antennas of 30 dB has been ensured thanks to quarter wavelength slot stubs and a proper positioning of the...
This paper describes different measurements schemes for UWB antenna characterization in frequency domain as well as in time domain. The antenna measurements are well known in frequency domain, but the UWB technology introduces new requirements, especially in the time domain and then different measurement methods are necessaries. The time domain characteristics could be obtained through direct method...
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