Browsing by Author "Boussada A."

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • Thumbnail Image
    Article
    Citation - Scopus: 4
    Carrier aggregation compatible MIMO antenna for LTE handset
    (Electromagnetics Academy, 2017) Rasilainen K.; Lehtovuori A.; Boussada A.; Viikari V.
    This paper proposes a two-element LTE MIMO handset antenna with physically different main and diversity antennas. The performance of the design is studied theoretically and experimentally. The investigated design utilises physically different main and diversity antennas to improve especially the low-band MIMO performance. A Combined Parasitic-coupled, Aperture-Matched (CPAM) antenna is used as the main antenna, and the diversity antenna is a simple Capacitive Coupling Element (CCE) design. The antenna covers the LTE bands from 698–960 MHz and 1710–2690 MHz with fixed matching circuits suitable for low-band (LB) Carrier Aggregation (CA). Measured total efficiency of the antennas is from ?3 to ?6dB and ?2 to ?5 dB at the low and high bands, respectively. In the MIMO case, envelope correlation coefficient (ECC) and multiplexing efficiency ((image found)mux) are studied also from measurements. © 2017, Electromagnetics Academy. All rights reserved.
  • Thumbnail Image
    Conference Object
    Citation - WoS: 2
    Citation - Scopus: 4
    Erroneous Reading of Information in Chipless Rfid Tags
    (Electromagnetics Academy, 2017) Boussada A.; Machac J.; Svanda M.; Havlicek J.; Polivka M.
    Chipless RFID tags are designed as arrays of planar or uniplanar resonators. These tags should be as small as possible to increase their attraction. On the other hand the closer are particular resonators located the tighter is their coupling. This coupling prevents the reader from proper reading the coded information. This is due to detuning of particular resonant frequencies of resonators and due to changing levels of the resonant peaks. Finally some compromise must be done in the tag design. For error-less reading of information coded by the presence/absence of resonant peaks in the RCS response the proper choice of scatterer topology and their arrangement has significant importance. Simple and efficient way of checking the suitability of particular resonators is presented. © 2018 Electromagnetics Academy. All rights reserved.