Review
Computer Science, Information Systems
Suhila Abulgasem, Faisel Tubbal, Raad Raad, Panagiotis Ioannis Theoharis, Sining Lu, Saeid Iranmanesh
Summary: CubeSats, a type of cost-effective nano satellites that can be built using commercial components, have gained popularity as an alternative to traditional satellites for space programs. This paper reviews 48 antenna designs proposed for CubeSat applications, discussing current challenges and design techniques. The antennas are classified based on operating frequency bands, and a qualitative comparison is provided in terms of size, bandwidth, gains, and deployability, presenting future trends for CubeSat antennas.
Review
Engineering, Aerospace
Fei Teng, Jixiang Wan, Jia Liu
Summary: This article reviews the utilization of terahertz (THz) antenna technology in atmospheric remote sensing, radio astronomy, and deep space exploration over the past three decades. It discusses various scientific and engineering applications, including the specifications, design issues, and performance of different THz antenna systems. Horn array antennas (synthetic aperture radiometry), reflector antennas fed by quasi-optical networks, and traditional microwave networks are widely used in the designs for science missions. Additionally, it introduces some promising THz antennas for future missions and provides viewpoints on research challenges and future directions.
IEEE AEROSPACE AND ELECTRONIC SYSTEMS MAGAZINE
(2023)
Article
Engineering, Electrical & Electronic
Richard W. Ziolkowski
Summary: There is a demand for highly directive antenna systems for space-limited Internet-of-Things devices and NextG applications. Compact high-frequency high-directivity alternatives to phased arrays are desired. This study presents the simulated performance characteristics of compact unidirectional mixed-multipole antennas (UMMAs) based on dipole and quadrupole mixtures, showing their high directivities and attractive radiation efficiencies.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Computer Science, Information Systems
Huan-Chu Huang
Summary: This article systematically and insightfully presents the evolution of solutions and designs for millimeter-Wave antennas compatible with the metal exteriors of cellular phones, including various specific solutions and design analyses.
Article
Computer Science, Information Systems
Miquel Sureda, Marco Sobrino, Oriol Millan, Andrea Aguilella, Arnau Solanellas, Marc Badia, Joan Francesc Munoz-Martin, Lara Fernandez, Joan A. Ruiz-De-Azua, Adriano Camps
Summary: CubeSats have revolutionized Earth Observation and space science, with antenna deployment from a stowed configuration remaining a major challenge. This paper presents the design, optimization, and testing of an L-band helix antenna deployment system for the (3)Cat-4 CubeSat, illustrating a novel methodology for optimizing antenna deployment steps.
Article
Engineering, Electrical & Electronic
Junlin Pu, Bing Zhang
Summary: A new design method is proposed to axially miniaturize the microstrip log-periodic dipole array (LPDA) antenna by redistributing the resonance points and adjusting the length of each dipole. This method can achieve a considerable size reduction for LPDAs while maintaining the bandwidth unchanged, showing good versatility across different frequency bands.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Sarath Kumar Annavarapu, Abhijyoti Ghosh, L. Lolit Kumar Singh, Sudipta Chattopadhyay, Chow-Yen-Desmond Sim
Summary: This letter proposes a planar microstrip antenna for wireless underground sensor networks, which achieves high gain and efficiency through the judicious use of shorting vias and a composite substrate.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Constant M. A. Niamien
Summary: This communication presents a synthesis approach for constructing collocated, orthogonal quasi-isotropic antenna arrays. It introduces the vector effective height formulation and derives the optimal tripole antenna, which outperforms the traditional turnstile antenna.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Computer Science, Information Systems
Pablo Sanchez-Olivares, Jose Luis Masa-Campos, Eduardo Garcia-Marin
Summary: Two designs of conical-beam array antennas are proposed for fifth-generation applications, based on slotted cylindrical waveguides and a travelling-wave topology. They provide dual polarization and high performance, with one design operating in the 37-40 GHz band and the other in the 26-30 GHz and 37-40 GHz bands for 5G applications.
Article
Engineering, Electrical & Electronic
Diego Gallardo, David Monasterio, Ricardo Finger, F. Patricio Mena, Leonardo Bronfman
Summary: This study introduces a miniaturized multiband metamaterial (MTM)-based antenna for array applications, operating effectively in the LTE and UMTS uplinks within the 800-3000 MHz range. The antenna elements, consisting of a radiator and MTM reflector, are compact and designed to improve radiation efficiency, with the reflector utilizing a novel multilayered MTM structure. The use of MTM allows for in-phase reflection behavior across different parts of the band, resulting in improved performance compared to traditional narrow bandwidth magnetic conductors.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Constant M. A. Niamien
Summary: This article presents the design and fabrication of single-feed planar multiband quasi-isotropic antennas. The modified dipole antenna element with an inclined central part is optimized for dual-band operation. The fabricated prototype covers the frequency bands of 815-1095 MHz and 1650-2090 MHz with good correlation between simulations and experiments. The antenna design features wide impedance bandwidths, good isotropic patterns, and scalability to more isotropic bands, making it suitable for various wireless applications.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Jing-Ya Deng, Rui-Qing Luo, Wei Lin, Yin Zhang, Dongquan Sun, Xiao-Miao Zhang, Li-Xin Guo
Summary: The miniaturized H-plane horn antenna with increased gain achieved by loading slow wave structures inside the shortened horn cavity is able to significantly reduce longitudinal length, while maximizing gain and aperture efficiency.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Computer Science, Information Systems
Nursultan Meirambekuly, Beibit A. Karibayev, Timur A. Namazbayev, Gulama-Garip Alisher E. Ibrayev, Sabyr O. Orynbassar, Samsonenko Anatoliy Ivanovich, Amirkhan A. Temirbayev
Summary: A new spiral dual-band antenna integrated with an optical system for a small CubeSat spacecraft was proposed in this study. It is challenging to design an antenna with limited space on a CubeSat platform. The proposed antenna system is compact, operates in the L- and S-bands, and can be integrated with spacecraft cameras. The study achieved reflection coefficients of -18 dB and -23 dB and gain of 6.8 dBi and 7.4 dBi at resonant frequencies of 1.7 GHz and 2.45 GHz, respectively. The conical shape of the spiral antenna allows for increased coverage area, and a simple deployment system and feedback ensure mission safety. These properties make the proposed antenna suitable for CubeSat systems.
Article
Engineering, Electrical & Electronic
Patrik Gruner, Ines Dorsch, Christian Waldschmidt
Summary: The article introduces a new design theory for biomimetic antenna arrays (BMAAs) that can provide high angular resolution while occupying little space. By varying the biomimetic coupling, a prototype of a four-antenna element BMAA at 76.5 GHz was designed and tested.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Adam Narbudowicz, Robert Borowiec, Suramate Chalermwisutkul
Summary: The proposed CubeSat antenna utilizes characteristic modes on the spacecraft's body to increase the radiating aperture, providing reliable communication independently from spacecraft's orientation. It incorporates a differential feeding structure to enhance power and includes impedance matching circuit and lumped capacitor for adjusting operating frequency.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Lida Kouhalvandi, Ladislau Matekovits
Summary: Frequency-selective surfaces (FSSs) are structures composed of repeated unit cells that control the reflection, transmission, and absorption of electromagnetic fields. This paper presents an optimization-based automated methodology for designing and optimizing FSS structures. The artificial neural network paradigm and particle swarm optimization algorithm are used to optimize the FSS design. An FSS structure with a wide transmission band in the 7.0-11.2 GHz range is considered to verify the effectiveness of the proposed method.
SIGNAL IMAGE AND VIDEO PROCESSING
(2023)
Article
Physics, Applied
A. Ospanova, M. Cojocari, P. Lamberti, A. Plyushch, L. Matekovits, Yu. Svirko, P. Kuzhir, A. Basharin
Summary: According to the Babinet principle, the diffraction pattern from an opaque body is identical to that from a hole of the same shape and size. We propose a Babinet principle-based metamaterial made of two complementary metal/hole checkerboards, which demonstrates absolute transparency in a broad frequency range. The proven concept of simple, reproducible, and scalable design of the Babinet metamaterial paves the way for the fabrication of broadband transparent devices at any frequency, including THz and optical ranges.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Muhammad Usman Khan, Muhammad Ramzan Saeed Ashraf Janjua, Junaid Yaqoob, Riaz Hussain, Muhammad Khalid, Asad Syed, Abdallah M. Elgorban, Nouf S. S. Zaghloul
Summary: In this study, the all-boron fullerene analogue B38 nanocluster was utilized to develop highly efficient nonlinear optical (NLO) materials. By doping superalkali metals onto B38 nanocluster, sixteen stable isomers of M3X@B38 were synthesized and their NLO properties were calculated. The results showed that doping superalkalis could decrease the energy gap and increase the dipole moment, enhancing the NLO response. This research provides an efficient doping technique for creating future NLO systems and recommends superalkali-doped B38 nanoclusters as ideal materials for NLO applications.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Chemistry, Organic
Talha Hassan, Muhammad Adnan, Riaz Hussain, Fakhar Hussain, Muhammad Usman Khan
Summary: End-capped modification is a promising method to enhance the performance of solar cells. Researchers are currently designing new molecules, such as SA1-SA5, with lower excitation energy levels and excellent charge mobility. Among these molecules, SA3 has emerged as the most suitable choice due to its outstanding photovoltaic characteristics.
JOURNAL OF PHYSICAL ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Kainat Atiq, Muhammad Adnan, Shabbir Muhammad, Riaz Hussain, Zobia Irshad, Muhammad Usman Khan
Summary: Tilde-shaped PPIC-based acceptor materials (RK1-RK7) using PP as the central-core unit were effectively developed and characterized in this study to explore their optical and optoelectronic characteristics. These engineered tilde-shaped materials displayed deeper HOMO levels and more significant extinction coefficients, likely improving phase separation morphology in blend formation. Theoretical characterization and simulations were conducted to study various properties of these substances.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Biochemistry & Molecular Biology
Muhammad Usman Khan, Faiza Shafiq, Sanaa S. Al Abbad, Junaid Yaqoob, Riaz Hussain, Zainab H. A. Alsunaidi, Ghulam Mustafa, Shabbir Hussain
Summary: Organic solar cells (OSCs) made from electron-acceptor and electron-donor materials have shown great potential in cutting-edge optoelectronic applications. In this study, we designed seven novel non-fused ring electron acceptors (NFREAs) using synthesized electron-deficient diketone units and reported end-capped acceptors. Through analysis of their photovoltaic, photophysical, and electronic properties, our findings indicate that these designed molecules have superior performance compared to reference compounds. Specifically, BTIC-U5 and BTIC-U7 showed the highest power conversion efficiency, fill factor, and open circuit voltage.
Article
Physics, Condensed Matter
Ola A. Abu Ali, Muhammad Usman Khan, Muhammad Adnan Asghar, Samy F. Mahmoud, Salah M. El-Bahy, Rabia Baby, Muhammad Ramzan Saeed Ashraf Janjua
Summary: The construction of environmentally friendly organic solar cells (EFOSCs) is an emerging field of research, and OSCs constructed from non-environmentally friendly materials have shown high efficiencies. By replacing toxic cyanide groups (-C---N) with non-toxic groups (-CF3, -SO3H, -NO2), the proposed novel carbazole-thiophene based compounds (DTC1-DTC9) are recommended for making EFOSCs with promising photovoltaic properties.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Materials Science, Multidisciplinary
Azka Asif, Muhammad Usman Khan, Junaid Yaqoob, Ghulam Mustafa, Saeed Ahmed, Norah Alhokbany, Zunaira Shafiq, Muhammad Ramzan Saeed Ashraf Janjua
Summary: This research explores the potential of superhalogens-doped tetracyclopentatetraphenylnene (TCPTP) as new nonlinear optical (NLO) materials through density functional theory calculations. The computational findings show that superhalogens doping can significantly change the thermodynamic stability and electronic properties of TCPTP, while enhancing its transparency in the UV region and nonlinear optical response. This research is of great significance for the development of innovative NLO materials.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Computer Science, Information Systems
Usman Ali, Sadiq Ullah, Abdul Basir, Babar Kamal, Ladislau Matekovits, Hyoungsuk Yoo
Summary: This study focused on the design and analysis of an artificial magnetic conductor (AMC)-based fabric antenna for body-centric communication. The proposed antenna, made of felt, operates at 2.45 GHz and includes a 2 x 2 AMC array to improve its performance. The AMC-integrated antenna demonstrated enhanced radiation properties, decreased back lobes, and reduced specific absorption rate values, making it suitable for healthcare monitoring, wearable electronics, and IoT systems.
Article
Chemistry, Multidisciplinary
Mohammed A. Assiri, Akbar Ali, Muhammad Ibrahim, Muhammad Usman Khan, Khalid Ahmed, Muhammad Sajid Hamid Akash, Muhammad Akhtar Abbas, Athar Javed, Muhammad Suleman, Muhammad Khalid, Ishtiaq Hussain
Summary: The synthesis of three lauric acid-based hydrazones was carried out and their antioxidant and anticancer activities were evaluated. The results showed that NBDH exhibited the highest antioxidant activity, while FBDH showed the highest anticancer activity. Molecular simulation analysis confirmed the potential of these compounds for biological, electronic, and nonlinear optical applications.
Article
Computer Science, Information Systems
Jalal Khan, Sadiq Ullah, Usman Ali, Ladislau Matekovits, Farooq Ahmad Tahir, Muhammad Inam Abbasi
Summary: This paper presents the design and specific absorption rate (SAR) analysis of a 37 GHz antenna for 5G applications. The antenna, consisting of 4 rectangular patches, exhibits good performance in the presence of the human body, with SAR values below the recommended limit. The simulated and measured results show close agreement, making it a potential candidate for fifth-generation smartphones and other handheld devices.
CMC-COMPUTERS MATERIALS & CONTINUA
(2023)
Review
Computer Science, Information Systems
Usman Ali, Sadiq Ullah, Babar Kamal, Ladislau Matekovits, Amir Altaf
Summary: Wearable antennas are vital for Body Centric Communication (BCC) in various fields. Due to their close proximity to the human body, their performance is influenced by the coupling and absorption of human body tissues. Designing wearable antennas becomes challenging considering textile materials, high conductivity materials, and deformation scenarios. To enhance their performance and reduce SAR, metamaterial surfaces are introduced.
Article
Computer Science, Information Systems
Saeed Fakhte, Ladislau Matekovits
Summary: By placing a teflon tube around a circularly polarized dielectric resonator antenna, a new planar method for the excitation of circularly polarized dielectric rod antenna is proposed, which achieves lower back-lobe and sidelobe levels and higher radiation efficiency.
Article
Chemistry, Physical
Muhammad Awais Afzal, Muhammad Usman Khan, Muhammad Usman Alvi, Junaid Yaqoob, Norah Alhokbany, Saeed Ahmed, Muhammad Ramzan Saeed Ashraf Janjua
Summary: This study proposes ten new molecules with high efficiency potential for photovoltaic materials and evaluates their optoelectronic properties. The results show that the molecule SH05 exhibits the best optoelectronic performance and is suitable for organic solar cells.
JOURNAL OF MOLECULAR STRUCTURE
(2024)
Article
Chemistry, Physical
Muhammad Usman Khan, Faiza Shafiq, Muhammad Ramzan Saeed Ashraf Janjua, Muhammad Khalid, Junaid Yaqoob, Muhammad Arshad, Saad M. Alshehri, Rais Ahmad Khan
Summary: This study investigates seven novel donor molecules based on BDT and predicts a high power conversion efficiency for organic solar cells. The addition of acceptor groups improves the optical and chemical characteristics of the molecules, with D2 showing the most favorable optoelectronic properties and charge transfer capability.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
