Nur Farhan Kahar
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Preferred name
Nur Farhan Kahar
Official Name
Nur Farhan, Kahar
Alternative Name
Kahar, Nur Farhan
Kahar, N. F.
Main Affiliation
Scopus Author ID
26633133000
Researcher ID
FEI-3508-2022

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  • Publication
    Frequency Reconfigurable DRA using RF Switch Loaded Feedline for 5G NR Band n48, n77 and n78
    ( 2022-01-01)
    Gunasekaran S.R.
    ;
    Thennarasan Sabapathy
    ;
    Muzammil Jusoh
    ;
    R Badlishah Ahmad
    ;
    Nur Farhan Kahar
    ;
    Muhamad W.Z.A.W.
    This paper presents a frequency reconfigurable DRA. The size of the antenna is approximately 50 mm by 40 mm, thus it can be considered a compact design. This antenna was designed using Rogers RO4003 substrate and the DRA material used was Eccostock HIK. To achieve frequency reconfiguration, the length of the antenna feedline was reconfigured by the means of RF switches. The proposed design consists of four configurations and all those conditions achieved reflection coefficient of less than -10 dB. The antenna also produced consistent gain for all configurations with average gain of 5 dBi. The switched frequencies from the proposed antenna can cover 5G New Radio Bands n48, n77 and n78.
      1  23
  • Publication
    Gain Enhancement of Rectangular Dielectric Resonator Antenna Using Air Gap
    ( 2023-10-06)
    Shanmuka Rooban Gunasekaran
    ;
    Thennarasan Sabapathy
    ;
    Muzammil Jusoh
    ;
    R Badlishah Ahmad
    ;
    Mohamed Nasrun Osman
    ;
    Saidatul Norlyana Azemi
    ;
    Nur Farhan Kahar
    ;
    Wan Zuki Azman Wan Muhamad
    ;
    Saravanan Nathan Lurudusamy
    This paper presents a gain enhanced rectangular dielectric resonator antenna (DRA) using air gap. The air gap placed under the dielectric resonator antenna and above the ground plane. A gain of 6.605 dBi obtained from the DRA with air gap while gain of 5.956 dBi is achieved by DRA without air gap. The size of the antenna is approximately 50 mm by 40 mm, thus it can be considered a compact design. This antenna designed using Rogers RO4003 substrate and the DRA material is Eccostock HIK. All the design and simulation results are conducted using CST Studio Suite 2019 software. Based on the result, it shows that the antenna operates with reflection coefficient of less than -10 dB at the desired operating frequency range, centered at 3.5 GHz. The inclusion of air gap proved that it can enhance the gain value of the DRA.
      2  3