Omar A. Saraereh^*, Ashraf Ali

CMC-Computers, Materials & Continua, Vol.70, No.3, pp. 5383-5397, 2022, DOI:10.32604/cmc.2022.021724 - 11 October 2021

Abstract With the rapid growth in the number of mobile devices and user connectivity, the demand for higher system capacity and improved quality-of-service is required. As the demand for high-speed wireless communication grows, numerous modulation techniques in the frequency, temporal, and spatial domains, such as orthogonal frequency division multiplexing (OFDM), time division multiple access (TDMA), space division multiple access (SDMA), and multiple-input multiple-output (MIMO), are being developed. Along with those approaches, electromagnetic waves’ orbital angular momentum (OAM) is attracting attention because it has the potential to boost the wireless communication capacity. Antenna electromagnetic radiation can be… More >

Niamat Hussain¹, Anees Abbas¹, Sang-Myeong Park¹, Seong Gyoon Park², Nam Kim^1,*

CMC-Computers, Materials & Continua, Vol.70, No.2, pp. 3321-3331, 2022, DOI:10.32604/cmc.2022.020688 - 27 September 2021

Abstract We designed and constructed a novel, compact tri-band monopole antenna for intelligent devices. Multiband behavior was achieved by placing inverted-L shaped stubs of various lengths in a triangular monopole antenna fed by a coplanar waveguide. The resonance frequency of each band can be controlled by varying the length of the corresponding stub. Three bands, at 2.4 (2.37–2.51), 3.5 (3.34–3.71), and 5.5 (4.6–6.4) GHz, were easily obtained using three stubs of different lengths. For miniaturization, a portion of the longest stub (at 2.4 GHz) was printed on the opposite side of the substrate, and connected to More >

Siti Rahena Isa^1,2, Muzammil Jusoh^2,*, Thennarasan Sabapathy², Jamel Nebhen³, Muhammad Ramlee Kamarudin⁴, Mohamed Nasrun Osman², Qammer Hussain Abbasi⁵, Hasliza A. Rahim², Mohd Najib Mohd Yasin², Ping Jack Soh²

CMC-Computers, Materials & Continua, Vol.70, No.2, pp. 2699-2725, 2022, DOI:10.32604/cmc.2022.019769 - 27 September 2021

Abstract New requirements in communication technologies make it imperative to rehash conventional features such as reconfigurable antennas to adapt with the future adaptability advancements. This paper presents a comprehensive review of reconfigurable antennas, specifically in terms of radiation patterns for adaptation in the upcoming Fifth Generation (5G) New Radio frequency bands. They represent the key of antenna technology for materializing a high rate transmission, increased spectral and energy efficiency, reduced interference, and improved the beam steering and beam shaping, thereby land a great promise for planar antennas to boost the mid-band 5G. This review begins with… More >

Mohammad Monirujjaman Khan¹, Arifa Sultana¹, Mehedi Masud^2,*, Gurjot Singh Gaba³, Hesham A. Alhumyani⁴

Computer Systems Science and Engineering, Vol.40, No.3, pp. 1183-1198, 2022, DOI:10.32604/csse.2022.019872 - 24 September 2021

Abstract This paper presents the design and analysis of a miniaturized and novel wearable ultra-wideband (UWB) band-notch textile antenna for Body Area Networks (BANs). The major goal of building the antenna for wearable applications with band notch in X-band is to reject the downlink band (7.25 to 7.75 GHz) of satellite communication in the UWB frequency ranges of 3.1–10.6 GHz to keep away from interference. Computer Simulation Technology (CST) TM Microwave Studio, which is user-friendly and reliable, was used to model and simulate the antenna. The radiating element of the antenna is designed on Jeans’ textile… More >

Sk Raziul Ahasan¹, Kaisarul Islam¹, Mohammad Monirujjaman Khan^1,*, Mehedi Masud², Gurjot Singh Gaba³, Hesham A. Alhumyani⁴

Computer Systems Science and Engineering, Vol.40, No.2, pp. 673-689, 2022, DOI:10.32604/csse.2022.019585 - 09 September 2021

Abstract In this paper, a novel and compact ultra-wideband (UWB) antenna with band-notched characteristics for body-centric communication is examined and implemented. The shape of the designed antenna looks like a ‘swan’ with a slotted patch. The performance parameters of this antenna for both the free space and on-body scenario for body-centric communication are analyzed and investigated through the simulation process using Computer Simulation Technology (CST). This antenna can avoid the interference caused by Wireless Local Area Network (WLAN) (5.15–5.825 GHz) and Worldwide Interoperability for Microwave Access (WiMAX) (5.25–5.85 GHz) systems with a band notch because of… More >

Ahmed Jamal Abdullah Al-Gburi^*, Imran Bin Mohd Ibrahim, Zahriladha Zakaria, Badrul Hisham Ahmad, Noor Azwan Bin Shairi, Mohammed Yousif Zeain

CMC-Computers, Materials & Continua, Vol.70, No.1, pp. 1419-1436, 2022, DOI:10.32604/cmc.2022.019741 - 07 September 2021

Abstract In this paper, a high gain and directional coplanar waveguide (CPW)-fed ultra-wideband (UWB) planar antenna with a new frequency selective surface (FSS) unit cells design is proposed for UWB applications. The proposed UWB antenna was designed based on the Mercedes artistic-shaped planar (MAP) antenna. The antenna consisted of a circular ring embedded with three straight legs for antenna impedance bandwidth improvement. The modelled FSS used the integration of a two parallel conductive metallic patch with a circular loop structure. The FSS provided a UWB stopband filter response covering a bandwidth of 10.5 GHz, for frequencies… More >

Hijab Zahra¹, Wahaj Abbas Awan², Niamat Hussain^3,*, Syed Muzahir Abbas^1,4, Subhas Mukhopadhyay¹

CMC-Computers, Materials & Continua, Vol.70, No.1, pp. 1935-1944, 2022, DOI:10.32604/cmc.2022.019495 - 07 September 2021

Abstract This paper presents the design and characterization of a via free planar single turn helix for 28 GHz broadband applications. The proposed antenna is designed using ROGERS RO4003 material, having a simple structure and end-fire radiation pattern. The antenna comprises of a compact dimension of 1.36 λ₀ × 0.9 λ₀ with a thickness of 0.0189 λ₀ (where λ₀ is the free-space wavelength at the central frequency of 28 GHz). Parametric study has been carried out to investigate the impact of key design parameters and to achieve an optimum design. Results show a good agreement between the simulated… More >

Alamgir Safi¹, Muhammad Asghar Khan^2,*, Fahad Algarni³, Muhammad Adnan Aziz¹, M. Irfan Uddin⁴, Insaf Ullah², Tanweer Ahmad Cheema¹

CMC-Computers, Materials & Continua, Vol.70, No.1, pp. 581-599, 2022, DOI:10.32604/cmc.2022.018963 - 07 September 2021

Abstract Linear antenna arrays (LAs) can be used to accurately predict the direction of arrival (DOAs) of various targets of interest in a given area. However, under certain conditions, LA suffers from the problem of ambiguities among the angles of targets, which may result in misinterpretation of such targets. In order to cope up with such ambiguities, various techniques have been proposed. Unfortunately, none of them fully resolved such a problem because of rank deficiency and high computational cost. We aimed to resolve such a problem by proposing an algorithm using differential geometry. The proposed algorithm… More >

Omar A. Saraereh^1,*, Luae Al-Tarawneh², Ashraf Ali¹, Amani M. Al Hadidi³

Intelligent Automation & Soft Computing, Vol.31, No.1, pp. 607-619, 2022, DOI:10.32604/iasc.2022.020216 - 03 September 2021

Abstract The frequency range of the terahertz (THz) band is usually defined as 0.3~3.0 THz, and some scholars have also extended it to 0.1~10 THz. THz technology has the characteristics of low photon radiation energy and rich spectrum information, and the THz band contains the vibration and rotation resonance frequencies of many material macromolecules, which can realize fingerprint detection. Therefore, THz technology has great academic value and a wide range of applications in basic research and applied science. Application prospects, such as THz spectroscopy technology provides a new means for studying the interaction between electromagnetic waves… More >

El-Sayed M. El-kenawy¹, Hattan F. Abutarboush², Ali Wagdy Mohamed^3,4, Abdelhameed Ibrahim^5,*

CMC-Computers, Materials & Continua, Vol.69, No.3, pp. 2983-2995, 2021, DOI:10.32604/cmc.2021.019114 - 24 August 2021

Abstract Machine learning (ML) has taken the world by a tornado with its prevalent applications in automating ordinary tasks and using turbulent insights throughout scientific research and design strolls. ML is a massive area within artificial intelligence (AI) that focuses on obtaining valuable information out of data, explaining why ML has often been related to stats and data science. An advanced meta-heuristic optimization algorithm is proposed in this work for the optimization problem of antenna architecture design. The algorithm is designed, depending on the hybrid between the Sine Cosine Algorithm (SCA) and the Grey Wolf Optimizer More >