Faculty Publications

Permanent URI for this communityhttps://idr.nitk.ac.in/handle/123456789/18736

Publications by NITK Faculty

Browse

Author: search.filters.author.Paul, P.M.

Search Results

Now showing 1 - 9 of 9
  • No Thumbnail Available
    Item
    SRR loaded slot antenna for multiband applications
    (Institute of Electrical and Electronics Engineers Inc., 2017) Paul, P.M.; Kandasamy, K.; Sharawi, M.S.
    A compact square shaped microstrip triband slot antenna is proposed. Two Split Ring Resonators (SRR) of the same configuration are loaded at one edge of the slot in a back to back orientation. The other edge of the slot is displaced with two 180° rotated SRR's with multiple slits. The additional bands are obtained from the resonance properties of the loaded SRR's. The antenna is simulated and measured. The resonance frequencies obtained are 2.7 GHz, 4.3 GHz and 4.7 GHz. A minimum bandwidth of 130 MHz is achieved. © 2017 IEEE.
  • No Thumbnail Available
    Item
    A Multi-Band SRR and Strip Loaded Slot Antenna
    (Institute of Electrical and Electronics Engineers Inc., 2018) Paul, P.M.; Kandasamy, K.; Sharawi, M.S.
    In this paper, a novel compact slot antenna suitable for penta-band applications is proposed. The different resonances are obtained by loading the slot on the top layer with an array of copper strips of equal length and with a Split Ring Resonator (SRR) at the bottom layer. The antenna prototype is fabricated and measured. The simulated and measured results are in good agreement. The antenna is found to resonate at frequencies of 1.51 GHz, 2.35 GHz, 2.9 GHz, 3.66 GHz and 5.6 GHz. Also, a gain higher that 2.4 dBi and a bandwidth of at least 80MHz are obtained for all the bands. © 2018 IEEE.
  • No Thumbnail Available
    Item
    Quad band SRR loaded square slot antenna
    (Institute of Electrical and Electronics Engineers Inc., 2018) Paul, P.M.; Kandasamy, K.; Sharawi, M.
    This paper proposes a Split Ring Resonator (SRR) loaded quad band microstrip slot antenna designed to operate at 2.42 GHz, 4.33 GHz, 8.46 GHz and 10.9 GHz. The additional resonant bands are generated by loading the square slot antenna with two pairs of SRR structures on either side of the feed line. The bands centered at 8.46 GHz and 10.9 GHz are found to exhibit wideband and circular polarization properties respectively. The resonance band at 8.46 GHz provides a wide bandwidth of 2.43 GHz. One pair of the loaded SRR structure consists of two spiral shaped connected SRR's. The excitation of these structures gives rise to a circularly polarized band at 10.9 GHz with 3-dB axial ratio bandwidth of 390 MHz. Maximum gains of 3.82 dB, 3.95 dB, 7.5 dB and 4.2 dB are obtained at the four resonant frequencies, respectively. A minimum bandwidth of 270MHz is observed for all the bands of operation. © 2017 IEEE.
  • No Thumbnail Available
    Item
    A Tri-Band SRR Loaded Half Slot Antenna with Wideband Properties
    (Institute of Electrical and Electronics Engineers Inc., 2018) Paul, P.M.; Kandasamy, K.; Sharawi, M.S.
    In this paper, a compact tri-band split ring resonator (SRR) loaded slot antenna is proposed which offers independent frequency tunability for operation at WLAN and WiMAX bands. The microstrip fed slot antenna is loaded with a modified SRR to obtain the triband resonance. The compactness is achieved by using an open slot antenna. The slot is designed to resonate at 2.4 GHz, which combines with the resonance obtained due to a fictitious short circuit produced at a certain point along the slot. This leads to the wideband property at the first band. The second and third resonances are obtained at 7.5 GHz and 9.3 GHz. The resonances can be independently controlled by changing the slot and SRR dimensions. © 2018 Radio Society.
  • No Thumbnail Available
    Item
    A Corner Expanded CPW-Fed Slot Antenna with Circular Polarization Characteristics
    (Institute of Electrical and Electronics Engineers Inc., 2019) Paul, P.M.; Kandasamy, K.; Sharawi, M.S.
    A planar, slot-based, simple and circularly polarized (CP) antenna is presented in this work. It consists of a square shaped slot that is fed via a coplanar waveguide (CPW) 50-ohm feed. The CP slot operates at a center frequency of 2.5GHz. Here, the corners are modified by adding small symmetric rectangular slot extensions to produce CP based waves. The plots obtained on simulation and measurement of the fabricated prototype display commendable similarity between each other. Very wide axial ratio bandwidth (ARBW) of 35% along with a maximum gain of 3.5dBi at 2.5GHz were accomplished. © 2019 European Association on Antennas and Propagation.
  • No Thumbnail Available
    Item
    A tri-band slot antenna loaded with split ring resonators
    (John Wiley and Sons Inc. P.O.Box 18667 Newark NJ 07191-8667, 2017) Paul, P.M.; Kandasamy, K.; Sharawi, M.S.
    A compact tri-band slot antenna with independent tuning capability of its resonant frequencies is proposed in this article. A microstrip line fed square slot is loaded with split ring resonators (SRR) to obtain multiband characteristics. The slot is designed to resonate at 2.6 GHz. Two SRRs with single and multiple splits are loaded with the slot, which provide additional resonances at 4.3 and 4.7 GHz, respectively. Parametric analysis of the antenna shows that its resonance frequencies are controlled independently. The proposed antenna is fabricated on an FR4 substrate with a size of 60 × 60 × 1.56 mm2. The proposed design offers stable omnidirectional patterns and >3.8 dBi at all the resonating frequency bands. © 2017 Wiley Periodicals, Inc.
  • No Thumbnail Available
    Item
    A triband circularly polarized strip and SRR-loaded slot antenna
    (Institute of Electrical and Electronics Engineers Inc., 2018) Paul, P.M.; Kandasamy, K.; Sharawi, M.S.
    In this communication, a simple and compact multiband circularly polarized (CP) slot antenna loaded with metallic strips and a split-ring resonator (SRR) is proposed. The multiband operation is obtained via exciting the SRR and copper strips by the microstrip-fed square slot antenna. The SRR resonates at 1.83 GHz, while the strips and the slot antenna provide resonances at 2.5 and 3.1 GHz. Resonant modes of loaded SRR and strips combined with the fundamental mode of the slot produce CP waves at the resonance frequencies of the proposed antenna. The proposed antenna allows for independent tuning of different bands via the use of the tilted strips and the SRR. Also, the sense of polarization at the resonance frequencies can be controlled by changing the orientation of the strips and the SRR with respect to the slot. The proposed antenna is fabricated on an FR-4 substrate of dimension 50 × 50 × 1.56 mm3. Antenna performances in terms of 10 dB return loss bandwidth, 3 dB axial ratio bandwidth, gain, and efficiency are validated experimentally and are in a good agreement with the simulated results. © 2018 IEEE.
  • No Thumbnail Available
    Item
    Dispersion-Engineered Transmission Line Loaded Slot Antenna for UWB Applications
    (Institute of Electrical and Electronics Engineers Inc., 2019) Paul, P.M.; Kandasamy, K.; Sharawi, M.S.; Majumder, B.
    A transmission line (TL) loaded, compact, ultrawideband (UWB) square slot antenna is proposed in this letter. The square slot is a microstrip line fed and loaded with an array of periodically perturbed TLs to achieve a UWB response from 2.1 to 11.5 GHz. The slot is designed to resonate at 2.6 GHz. The TLs are dispersion engineered to resonate at several frequencies so as to provide a wideband response. Loading of the engineered TLs on the square slot produced multiple resonances without affecting the fundamental mode of the slot antenna. The proposed antenna design is analyzed using dispersion relations and equivalent circuits. The proposed antenna is fabricated on an RT/Duroid 5880 substrate with a size of 50 × 50 × 1.52 mm3. The antenna performance metrics, such as impedance bandwidth, gain, and efficiency, are experimentally verified. Good agreement is obtained between simulated and measured results. © 2018 IEEE.
  • No Thumbnail Available
    Item
    A corner expanded slot antenna loaded with copper strips for dual-band circular polarization characteristics
    (John Wiley and Sons Inc. P.O.Box 18667 Newark NJ 07191-8667, 2020) Paul, P.M.; Kandasamy, K.; Sharawi, M.S.
    In this article, the design and implementation of a dual-band circularly polarized (CP) microstrip line fed square slot antenna with compact size is proposed. The proposed CP antenna consists of a square slot antenna with a pair of symmetric rectangular extensions on opposite corners and loaded with an array of inclined and truncated rectangular copper strips. The square slot with diagonal extensions resonates at 2.24 to 2.62 GHz with a 3 dB axial ratio (AR) bandwidth of 15.7%. Besides, loading it with an array of inclined and truncated rectangular copper strips helps produce a resonance at higher band with CP. The higher band operates between 3.26 and 5.18 GHz and centered at 4.52 GHz, with a 3 dB AR bandwidth of 45.5%. The polarization sense and resonant frequency of the proposed antenna can be independently tuned depending on the position and dimensions of the slot and strips, respectively. The proposed antenna is fabricated and measured in terms of impedance bandwidth, axial ratio bandwidth, peak gain, and radiation efficiency. Good agreement between the simulations and measurements of the prototype is obtained. © 2019 Wiley Periodicals, Inc.