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  • Open Access


    Cactus-Shaped Frequency Reconfigurable Antenna for Sub 10 GHz Wireless Applications

    Muhammad Irfan1, Wasi Ur Rehman Khan2, Sadiq Ullah2, Naveed Mufti2, Muhammad Fawad Khan2, Rizwan Ullah2, Usman Ali2, Fazal Muhammad3,*, Faisal Althobiani4, Mohammed Alshareef5, Shadi Alghaffari6, Saifur Rehman1, V. R. Shamji4

    Computer Systems Science and Engineering, Vol.45, No.3, pp. 2693-2704, 2023, DOI:10.32604/csse.2023.032778

    Abstract This paper presents, a novel cactus shaped frequency reconfigurable antenna for sub 10 GHz wireless applications. PIN diode is utilized as an electrical switch to achieve reconfigurability, enabling operation in four different frequency ranges. In the switch ON state mode, the antenna supports 2177–3431 and 6301–8467 MHz ranges. Alternatively, the antenna resonates within 2329–3431 and 4951–6718 MHz while in the OFF state mode. Radiation efficiency values, ranging from 68% to 84%, and gain values, ranging from 1.6 to 4 dB, in the operating frequency bands. the proposed antenna satisfy the practical requirements and expectations. The overall planner dimensions of the proposed antenna model… More >

  • Open Access


    Th-Shaped Tunable Multi-Band Antenna for Modern Wireless Applications

    Wasi Ur Rehman Khan1, Muhammad Fawad Khan1, Muhammad Irfan2, Sadiq Ullah1, Naveed Mufti1, Usman Ali1, Rizwan Ullah1, Fazal Muhammad3,*, Saifur Rahman2, Faisal Althobiani4, Mohammed Alshareef5, Mohammad E. Gommosani6

    CMC-Computers, Materials & Continua, Vol.74, No.2, pp. 2517-2530, 2023, DOI:10.32604/cmc.2023.031833

    Abstract A compact, reconfigurable antenna supporting multiple wireless services with a minimum number of switches is found lacking in literature and the same became the focus and outcome of this work. It was achieved by designing a Th-Shaped frequency reconfigurable multi-band microstrip planar antenna, based on use of a single switch within the radiating structure of the antenna. Three frequency bands (i.e., 2007–2501 MHz, 3660–3983 MHz and 9341–1046 MHz) can be operated with the switch in the ON switch state. In the OFF state of the switch, the antenna operates within the 2577–3280 MHz and 9379–1033 MHz Bands. The proposed antenna shows an acceptable input impedance… More >

  • Open Access


    Reconfigurable Pattern Patch Antenna for Mid-Band 5G: A Review

    Siti Rahena Isa1,2, Muzammil Jusoh2,*, 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

    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 an overview of the underlying… More >

  • Open Access


    Frequency Reconfigurable Antenna for Portable Wireless Applications

    Shakir Ullah1, Sadiq Ullah1, Inzamam Ahmad1, Wasi Ur Rehman Khan1, Toufeeq Ahmad1, Usman Habib2, Mahmoud A. Albreem3, Mohammed H. Alsharif4, Peerapong Uthansakul5,*

    CMC-Computers, Materials & Continua, Vol.68, No.3, pp. 3015-3027, 2021, DOI:10.32604/cmc.2021.015549

    Abstract In this paper, the design and experimental evaluation of a hexagonal-shaped coplanar waveguide (CPW)-feed frequency reconfigurable antenna is presented using flame retardant (FR)-4 substrate with size of 37 × 35 × 1.6 mm3. The antenna is made tunable to three different modes through the status of two pin diodes to operate in four distinct frequency bands, i.e., 2.45 GHz wireless fidelity (Wi-Fi) in MODE 1, 3.3 GHz (5G sub-6 GHz band) in MODE 2, 2.1 GHz (3G Long Term Evolution (LTE)-advanced) and 3.50 GHz Worldwide Interoperability for Microwave Access (WiMAX) in MODE 3. The optimization through simulation modeling shows that… More >

  • Open Access


    Frequency Reconfigurable Antenna for Multi Standard Wireless and Mobile Communication Systems

    Ikhlas Ahmad1, Haris Dildar1, Wasi Ur Rehman Khan1, Sadiq Ullah1, Shakir Ullah1, Mahmoud A. Albreem2, Mohammed H. Alsharif3, Peerapong Uthansakul4,*

    CMC-Computers, Materials & Continua, Vol.68, No.2, pp. 2563-2578, 2021, DOI:10.32604/cmc.2021.016813

    Abstract In this paper, low profile frequency reconfigurable monopole antenna is designed on FR-4 substrate with a compact size of 30 mm3 × 20 mm3 × 1.6 mm3. The antenna is tuned to four different modes through three pin diode switches. In Mode 1 (SW1 to SW3 = OFF), antenna covers a wideband of 3.15–8.51 GHz. For Mode 2 (SW1 = ON, SW2 to SW3 = OFF), the proposed antenna resonates at 3.5 GHz. The antenna shows dual band behavior and covers 2.6 and 6.4 GHz in Mode 3 (SW1 and SW2 = ON, SW3 = OFF). The same antenna covers… More >

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