Design and Analysis of a PET-Based Conformal Ultra-Broadband Monopole Antenna Kanwar Preet Kaur, Simardeep Kaur, Shimpy Ralhan 2026 6th International Conference on Advances in Electrical Computing Communications and Sustainable Technologies Icaect 2026, 2026 In this paper, a planar monopole antenna with ultra-broadband and conformal characteristics made of flexible Polyethylene Terephthalate (PET) substrate is designed and analyzed. The conductive element, a ten-point star (TPS), is engraved on a partially grounded PET substrate. The proposed antenna exhibits an ultra-broad response from 2.9 GHz to 14.46 GHz, which is sufficiently broad to be utilized in diverse applications. The desired ultra-broad bandwidth is achieved with a substrate thickness of 0.8 mm by stacking four layers of PET, 0.2 mm each. The measured relative permittivity and the loss tangent of the PET are 1.7 and 0.075, respectively. The proposed antenna has a small profile of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$1.158 \lambda_{0} \times 0.868 \lambda_{0} \times 0.023 \lambda_{0}$</tex> at the center frequency of 8.68 GHz with physical dimensions of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$40 \times 30 \times 0.8 \text{mm}^{3}$</tex>. Numerical data shows that this antenna has an ultra-broad -10 dB impedance bandwidth of 11.56 GHz and a fractional bandwidth of 133.18%. The antenna has an average gain of 3.3 dBi and a radiation efficiency of above 60%. Due to its ultra-broadband nature, mechanical flexibility, and small geometry profile, the designed antenna is a good candidate for wearable, portable, and high-frequency wireless communication systems.
Design Principles and Numerical Analysis of Ultrathin Polarization‑Insensitive Hybrid FSS: Dual Wide-Stopband and Triple Passband Characteristics Exploration Kanwar Preet Kaur, Trushit Upadhyaya, Upesh Patel, Poonam Thanki Radio Frequency and Microwave Design for Next Generation Wireless Applications, 2026 This chapter explores the design principles and performs numerical analysis of a novel hybrid frequency-selective surface (FSS) with polarization insensitivity and a wide acceptance angle for oblique incidences. The proposed hybrid FSS comprises a metallic crossbar with dished-disk terminations on both sides, housed within a square frame with a central circular aperture. The metallic structure is etched onto a 0.3 mm thick single-sided FR4 dielectric substrate. This simple, single-layered FSS, composed of metal-dielectric layers, exhibits two distinct characteristics: dual wide-stopbands and triple passbands, operating within the S-band, C-band, and X-band frequency range with a bidirectional feature. The stopband characteristics are evaluated through shielding effectiveness (SE) analysis, while the passband characteristics are examined via transmission response for both forward (FW) and backward (BW) incidences of electromagnetic (EM) waves. The dual stopbands resonate at 5.425 and 9.375 GHz, with broader 3-dB bandwidths of 80.83% (3–7.07 GHz) and 29.27% (7.64–10.26 GHz), respectively, and SE of 46.52 and 41.41 dB. On the other hand, the triple passband resonances are achieved at 2.525, 7.35, and 10.425 GHz. The overall thickness of the FSS is tailored to be less than https://www.w3.org/1998/Math/MathML" display="inline">λL/354 (https://www.w3.org/1998/Math/MathML" display="inline">λL is the wavelength at the lowest passband frequency), and the 263overall unit cell size is around 0.235https://www.w3.org/1998/Math/MathML" display="inline">λL. The efficacy of the hybrid FSS design is investigated across various polarization angles and oblique incident angles under both Transverse Electric (TE) and Transverse Magnetic (TM) modes. Additionally, the FSS response is studied across different outside and inside bending radii to ensure its conformality. Finally, the numerical analysis outcomes are validated with those obtained from equivalent transmission line model (ETLM) results.
Analysis of Low-Cost PET-Based Conformal and Polarization-Independent Ultrathin FSS Kanwar Preet Kaur, Trushit Upadhyaya, Upesh Patel, Poonam Thanki, Killol Pandya, Dhara Patel 2026 6th International Conference on Advances in Electrical Computing Communications and Sustainable Technologies Icaect 2026, 2026 A low-cost, conformal, polarization-independent, and ultrathin bi-functional FSS based on Polyethylene Terephthalate (PET) is presented in this paper for the <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$S, C, X$</tex>, and lower Ku-bands applications. The presented bi-functional frequency-selective surface (FSS) features a circular patch with a crossed double-sided arrow slot, imprinted on a 0.2 mm PET substrate. The proposed FSS exhibits dual stopband and passband responses. The 3-dB bandwidth of the dual stopbands extends from 3.03 GHz to 6.86 GHz and 10.57 GHz to 13.74 GHz, while the dual passband responses cover the frequency range from 6.75 GHz to 10.81 GHz and 13.64 GHz to 14.72 GHz. Further, the evaluated shielding effectiveness (SE) at the stopband frequencies of 5.39 GHz and 13.11 GHz are 33.99 dB and 26.1 dB, respectively. At the lowest 3-dB band-edge frequency of 3.03 GHz, this ultrathin FSS has dimensions of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$0.22 \lambda_{0} \times 0.22 \lambda_{0} \times 0.002 \lambda_{0}$</tex>, corresponding to 22 <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\text{mm} \times 22 ~\text{mm} \times 0.2 ~\text{mm}$</tex>. The proposed FSS is independent of polarization-angle variations and has a satisfactory acceptance angle for oblique incidence. Finally, PET-based FSS is analyzed for variations in physical parameters, including inwards and outwards bending.
Compact Orthogonal UWB MIMO Antenna With Fractal-Slotted Design for Enhanced Isolation in 5G-NR and X-Band Applications Killol Pandya, Trushit Upadhyaya, Aneri Pandya, Upesh Patel, Poonam Thanki, Kanwarpreet Kaur, Om Prakash Kumar International Journal of RF and Microwave Computer Aided Engineering, 2026 In this proposal, an advanced integrated multiple‐input multiple‐output (MIMO) antenna system has been presented for next generation 5G‐NR, high speed WLAN and X‐band communications. The four radiators having comb‐shaped geometry at the top edge are positioned orthogonally with each other. An adequate gap is maintained between the radiating ports of MIMO antenna to lower down the mutual coupling. A small fractal geometry is engineered at the bottom corners of the patch to receive size miniaturization, wide band performance and manufacturing advantage. In similar fashion, thin slots are introduced to excel the isolation. The ultrawide band response (1.6 GHz–11.35 GHz) could be achieved by introducing partial ground plane underneath each radiator. A commercially available Flame Retardant 4 substrate was utilized. The individual ground structures are interconnected using thin conducting strips, which play a dynamic role in system performance by providing high isolation between the MIMO elements. The proposed MIMO system is analyzed and confirmed based on various antenna responses such as diversity gain (DG) (>9 dB), mean effective gain (MEG) (−6 to −8 dB), channel capacity loss (CCL) (< 0.4 bits/s/Hz), and envelop correlation coefficient (ECC) (< 0.002 abs). The received reflection coefficient values from the MIMO antenna are compared with actual values. Both the responses are closely aligned with each other. This research supports SDG 9, SDG 11, and SDG 7 by advancing innovative wireless communication infrastructure, enabling sustainable and resilient smart city connectivity, and indirectly promoting energy‐efficient network operations through high‐isolation and efficient antenna design.
Numerical and Equivalent-Circuit Analysis of Ultrathin FSS With Wide-Stopband Response for EM Shielding Applications Kanwar Preet Kaur, M.L.S.N.S Lakshmi, Simardeep Kaur, Shimpy Ralhan 2025 5th International Conference on Advances in Electrical Computing Communication and Sustainable Technologies Icaect 2025, 2025 This work exhibits the design of a modified fanshaped element enclosed within a square patch featuring a circular void etched on ultrathin (0.3 mm thick) single-sided FR4 substrate, functioning as a frequency selective surface (FSS). The proposed FSS operates as a bandstop filter in the C-band covering frequencies from 3.96-7.59 GHz with shielding effectiveness (SE) of 45.7 dB. Additionally, bandpass filtering is achieved in the Sband from 2.34-3.31 GHz and in the X-band from 9.16-11.62 GHz. The ultrathin unit cell has dimensions of about 0.216λ0 × 0.216λ0 × 0.0029λ0, at the lower frequency (2.95 GHz) of the passband. The polarization-insensitive FSS provides oblique angle stability of 60° with SE of about 40 dB for both TE and TM modes. The simulated results are verified through elaborated transmission line equivalent circuit model analysis.
Ultrathin and Compact Broadband Printed Monopole Antenna with Steady Radiation Pattern for SHF Satellite Communication Kanwar Preet Kaur, Trushit Upadhyaya, Upesh Patel, Poonam Thanki, Killol Pandya, Dhara Patel 2025 5th International Conference on Advances in Electrical Computing Communication and Sustainable Technologies Icaect 2025, 2025 This paper presents a numerical analysis of an ultrathin and broadband printed monopole antenna for SHF satellite communication applications including VSAT. The antenna is designed by engraving a jigsaw puzzle with a 50 $\\Omega$ microstrip feed line on a 1 mm thick FR4 substrate terminated by a partial ground plane. The proposed antenna has a low profile of O. $5\\lambda_{0}\\times 0.325\\lambda_{0}\\times 0.025\\lambda_{0} (20 \\times 13\\times 1mm^{3})$ at the center frequency of 7.5 GHz. The numerical analysis of the antenna achieves a bandwidth of 5. 55 GHz and a fractional bandwidth of 74.15%, efficiently covering the frequency range from 4.71 GHz to 10.26 GHz, making it suitable for SHF satellite communication applications. The antenna delivers an average gain of2. 9 dBi and an efficiency greater than 90% with a steady omnidirectional radiation pattern within the operating range.
Compact Wideband Two Port MIMO Antenna with High Isolation for Wireless Applications Poonam Thanki, Trushit Upadhyaya, Upesh Patel, Kanwar Preet Kaur, Killol Pandya, Dhara Patel, V. T. Patel 2025 5th International Conference on Advances in Electrical Computing Communication and Sustainable Technologies Icaect 2025, 2025 A wideband Multiple input multiple output (MIMO) antenna with minimum isolation is analyzed and studied for wireless applications. The proposed two port MIMO has a minimum isolation, between components over the whole resonating frequency range, of 15dB and resonates a wide impedance bandwidth of 3.14-6.27 GHz. The n77 (3.3-4.2 GHz), n78 (3.3-3.8 GHz), n79 (4.4-5.0 GHz), and Wi-Fi 6E (5.15-7.125 GHz) frequencies are where the antenna is mostly used. Key MIMO metrics, including Total Active Reflection Coefficient (T ARC), Diversity Gain (DG), and Envelope Correlation Coefficient (ECC) are provided to evaluate how well the planned antenna works in the MIMO environment.
Numerical Analysis of Ultrathin and Polarization-Insensitive FSS with Wide-Stopband and Dual-Passband Response for Conformal Applications Kanwar Preet Kaur, Simardeep Kaur 2024 4th International Conference on Advances in Electrical Computing Communication and Sustainable Technologies Icaect 2024, 2024 A novel, ultrathin frequency-selective surface (FSS) has been developed and fine-tuned for EM shielding within the C-band, X-band, and initial frequencies of Ku-band. The design comprises a crossed double-sided arrow confined in a square aperture with a centered circular void. This FSS design offers a broader 3-dB bandwidth response of 5.39 GHz, effectively covering frequencies ranging from 5.85 GHz to 11.25 GHz. It focuses on a central frequency of 7.93 GHz, delivering a shielding effectiveness (SE) of 41.8 dB. In addition, the proposed FSS offers dual passband response centering at 4.78 GHz and 13.215 GHz. The thickness of the proposed FSS is less than λ0⁄150 , where λ0 is the lowest operating wavelength. The symmetric structure of the proposed wide-stopband FSS design imparts polarization-insensitive characteristics, ensuring a stable response at normal and oblique incidences for both TE and TM modes. Furthermore, the presented FSS design is analyzed for inbound and outbound bending making it suitable for conformal applications. Eventually, the numerically simulated results are verified with the outcomes of the equivalent circuit model.
Fundamentals of Stellar Parameters Estimation through CMD of Star Clusters: Open (NGC 2360) and Globular (NGC 5272) Bulgarian Astronomical Journal, 2023
Fundamentals of Stellar Parameters Estimation through CMD of Star Clusters: Open (NGC 2360) and Globular (NGC 5272) Bulgarian Astronomical Journal, 2022