Frequency reconfigurable key-shape antenna for LTE applications

Abdulhameed, Abdulghafor A.; Alnahwi, Falih M.; Al-Anbagi, Haidar N.; Kubík, Zdeněk; Abdullah, Abdulkareem S.

doi:10.1080/1448837x.2022.2112316

Cited by 6 publications

(2 citation statements)

References 20 publications

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“…The UWB technology has two problems; the interference between the UWB and the other single bands operating at the same frequency, and the cost of providing the UWB spectrum for using just one or two narrow bands simultaneously. The cognitive radio system solved these problems with the help of two antennas—a UWB antenna for sensing idle bands and a reconfigurable antenna for communication in these bands [ 2 , 3 , 4 , 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Switchable Broadband-to-Tunable Narrowband Magnetic Probe for Near-Field Measurements

Abdulhameed

Kubík

2022

Sensors

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This paper presents a printed magnetic probe that can switch from broadband to tunable narrowband for near-field measurement. In the early design stage, we created a printed loop gap resonator as a magnetic reference sensor for the pre-compliance test in a band up to 6 GHz. Consequently, the results showed a good response in terms of the S11 and S21 parameters of the proposed probe compared with the commercial magnetic sensor XF-R 3-1. The source noise might spread among different frequency bands, making the broadband magnetic probe the closest choice for estimating the magnetic field in the near-field region. Unfortunately, broadband magnetic probes have lower sensitivity than narrowband ones. One of the solutions to get high sensitivity is to connect the LNA to the output of the passive magnetic sensor. This work proposes a novel method to solve this issue using a PIN diode to change the broadband status into a high sensitivity narrowband status and then tune this narrowband across the most critical applications such as 3.5° GHz, 3.75° GHz, 4.8° GHz, and 5.2° GHz with the help of a varactor diode. Compared to the broadband status, an improvement of more than 10 dB has been obtained across all these wireless bands. Furthermore, the proposed structure’s isolation between the electrical and magnetic fields is about 13 dB.

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Section: Introductionmentioning

confidence: 99%

Switchable Broadband-to-Tunable Narrowband Magnetic Probe for Near-Field Measurements

Abdulhameed

Kubík

2022

Sensors

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“…The evolutions in wireless systems have motivated researchers to develop new communication forms to exploit the spectrum in the best way and enhance the reception quality [2][3][4][5]. Therefore, the cognitive radio technology was the best solution for this matter as it consists of two different antennas, one for sensing with Ultra-wideband of (3.1-10 GHz) to identify the state of the band-idle or active, while the other antenna is a communication antenna (reconfigurable antenna) [6][7][8][9][10][11]. This research focuses on the EMC applications, whereas an Ultra-wideband antenna can be used as a reference antenna for emission and immunity tests of the device under the test (DUT) inside the EMC chamber [12].…”

Section: Introductionmentioning

confidence: 99%

Design a Compact Printed Log-Periodic Biconical Dipole Array Antenna for EMC Measurements

Abdulhameed

Kubik

2022

Electronics

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This article presents the design, modeling, and fabrication of a printed log-periodic biconical dipole array antenna (PLPBDA) for electromagnetic compatibility (EMC) measurements. The proposed structure used bow tie-shaped dipoles instead of typical dipoles to achieve a size reduction of 50% and bandwidth enhancement of 170% with the help of PCB technology. Furthermore, the balanced feeding method and the modifications in bow tie-shaped dipole dimensions were utilized to obtain broad bandwidth of 5.5 GHz (from 0.5 GHz to 6 GHz). This structure comprises 12 dipole elements with a compact size of 170 × 160 × 1.6 mm, reflecting low fluctuations gain of about (4.6–7) dBi with the help of an extra dipole. Moreover, the achieved frequency and radiation characteristics (simulated and measured) agree with each other and are compatible with the results of classical EMC antennas. The achievements of this structure showed promising results compared to both literature reviews and reference antenna Hyper LOG® 7060 offered for sale.

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Quasi-Yagi antenna design for LTE applications and prediction of gain and directivity using machine learning approaches

Haque,

Zakariya,

Al-Bawri

et al. 2023

Alexandria Engineering Journal

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Frequency reconfigurable key-shape antenna for LTE applications

Cited by 6 publications

References 20 publications

Switchable Broadband-to-Tunable Narrowband Magnetic Probe for Near-Field Measurements

Switchable Broadband-to-Tunable Narrowband Magnetic Probe for Near-Field Measurements

Design a Compact Printed Log-Periodic Biconical Dipole Array Antenna for EMC Measurements

Quasi-Yagi antenna design for LTE applications and prediction of gain and directivity using machine learning approaches

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