Browsing by Author "Nikolaou, Symeon"

Now showing items 1-10 of 10

    • Article  

      A compact microstrip crossover using NRI-TL metamaterial lines 

      Abbasi, Muhammad Ali Babar; Antoniades, Marco A.; Nikolaou, Symeon (2018)
      A practical implementation of a miniaturized crossover is presented using negative-refractive-index transmission-line (NRI-TL) metamaterial lines. NRI-TL metamaterial theory has demonstrated that by loading a conventional ...
    • Article  

      A Compact Reconfigurable NRI-TL Metamaterial Phase Shifter for Antenna Applications 

      Abbasi, Muhammad Ali Babar; Antoniades, Marco A.; Nikolaou, Symeon (2018)
      This communication presents a compact reconfigurable phase shifter based on negative-refractive-index transmissionline (NRI-TL) metamaterial unit cells. Two interswitchable NRI-TL metamaterial unit cells are collocated ...
    • Conference Object  

      Dual-Band Compact Antenna for UHF and ISM Systems 

      Zahid, Salman; Quddious, Abdul; Tahir, Farooq A.; Vryonides, Photos; Antoniades, Marco; Nikolaou, Symeon (2019)
      A compact planar dual-band antenna for UHF and ISM bands is proposed. The antenna is fabricated on a 45 mm × 80 mm × 0.787 mm Rogers Duroid (R) 5880 substrate and is intended for use in Wireless Power Transfer (WPT) and ...
    • Conference Object  

      A Novel S-Band Bandpass Filter (BPF) with Extremely Broad Stopband 

      Vryonides, Photos; Arain, Salman; Quddious, Abdul; Antoniades, Marco A.; Nikolaou, Symeon (2018)
      This paper presents a new compact wideband bandpass filter (BPF) with an extremely broad stopband consisting of two parallel coupled-line sections and multiple open-ended stubs, for S-band applications. Due to symmetry of ...
    • Article  

      On the Use of Tunable Power Splitter for Simultaneous Wireless Information and Power Transfer Receivers 

      Quddious, Abdul; Abbasi, Muhammad Ali Babar; Tariq, Muhammad Haroon; Antoniades, Marco A.; Vryonides, Photos; Nikolaou, Symeon (2018)
      The use of a tunable power splitter (PS) as a constituent component of a simultaneous wireless information and power transfer (SWIPT) system is discussed. Two varactor diodes are used to achieve a tunable output power ratio ...
    • Article  

      Reconfigurable Bandwidth Bandpass Filter With Enhanced Out-of-Band Rejection Using $\pi $ -Section-Loaded Ring Resonator 

      Arain, Salman; Vryonides, Photos; Abbasi, Muhammad Ali Babar; Quddious, Abdul; Antoniades, Marco A.; Nikolaou, Symeon (2018)
      A novel ring resonator bandpass filter with reconfigurable bandwidth with central frequency at 2.4 GHz is demonstrated. Theoretical analysis for computing the resonant frequencies is shown, and the design approach of ...
    • Conference Object  

      Uniplanar Rectenna Designs Matched with either Active or Passive DC-to-DC Converter 

      Quddious, Abdul; Vryonides, Photos; Nikolaou, Symeon; Antoniades, Marco A. (2019)
      Two rectenna designs consisting of a patch antenna and a voltage doubler operating at 5.6 GHz are presented. Rectenna-1 is matched with a varying input impedance active DC-to-DC booster based on Texas Instruments charge ...
    • Article  

      UWB antenna with dynamically reconfigurable notch band using rectenna and active booster 

      Quddious, Abdul; Abbasi, Muhammad Ali Babar; Tahir, Farooq A.; Antoniades, Marco A.; Vryonides, Photos; Nikolaou, Symeon (2019)
      In this study, an ultra-wideband (UWB) monopole antenna with a dynamically reconfigurable notch band, along with the associated RF-triggered power management unit (PMU) that enables the dynamic reconfigurability, are ...
    • Book Chapter  

      Voltage-Doubler RF-to-DC Rectifiers for Ambient RF Energy Harvesting and Wireless Power Transfer Systems 

      Quddious, Abdul; Antoniades, Marco A.; Vryonides, Photos; Nikolaou, Symeon (IntechOpen, 2019)
      Wireless Power Transfer (WPT) is promoted as a key enabling technology (KET) for the widespread use of batteryless Internet of Things (IoT) devices and for 5G wireless networks. RF-to-DC rectifiers are essential components ...
    • Conference Object  

      Wearable sensor for communication with implantable devices 

      Abbasi, M. Ali Babar; Quddious, Abdul; Antoniades, Marco A.; Vryonides, Photos; Nikolaou, Symeon (2018)
      This study presents a simulation and measurement test-bench to investigate the antenna detuning, impedance mismatch and losses in through-body communications. These parameters are relevant to the efficient design of wearable ...