A compact monopole antenna with reconfigurable band notch for underlay cognitive radio applications

Mohammed, Ali Abdulwahhab; Alnahwi, Falih M.; Abdullah, Abdulkareem S.; Hameed, Abdul Ghafor A. Abdul

doi:10.1109/icasea.2018.8370950

Cited by 5 publications

(3 citation statements)

References 14 publications

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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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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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“…Integrating three Schottky diodes (HSCH-5330) as switching devices on the slots for DAM was presented in [26] for the UWB transmitting antenna design. A switchable band notch based on PIN diode integrated with Complementary Split Ring Resonators (CSRR) slot for reconfigurable monopole UWB antenna was investigated in [27] underlay cognitive radio applications. Single and dual stopbands for a printed UWB slot antenna were presented in [28] by using two PIN diodes embedded across the circular slot patch antenna to suit the WiMAX and WLAN bands.…”

Section: Introductionmentioning

confidence: 99%

Design of a Controllable Antenna Based on Embedded Differential PSK Modulation

Alnaiemy¹,

Nagy²

2021

PIER B

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Direct Antenna Modulation (DAM) is explored recently in many wireless communication systems. In this paper, we explore the modulation process of electromagnetic signals in the antenna circuit design directly. The proposed antenna consists of two non-concentric elliptical patches for broadband applications to suit the spread spectrum applications. To perform a Differential Phase Shift Keying (DPSK) modulation, two identical antennas are fed by a two-branch microstrip line with a phase shift. Utilizing Computer Simulation Technology of Microwave Studio (CSTMWS) based on Finite Integral Technique (FIT), an optimization based-on numerical analysis is adopted for designing the transmission line configuration at the desired frequency bands. The other significant aspect that has been achieved in this research is reducing the patch size to be suitable for wearable devices. Therefore, a cylindrical substrate is utilized for bending the proposed antenna structure. The proposed antenna design shows a gain of 4.73 dBi and 2.5 dBi for the planar and folded antenna profile, respectively. Two high-speed Positive Intrinsic Negative (PIN) diodes as switching elements of the RF signal are inserted between the identical antenna elements through a transmission line. Switch 1 (SW1) and switch 2 (SW2) are used to control the phase shift between the antenna elements by changing the switching state from (OFF-ON) and vice versa. The designed antenna is further investigated to realize the effects of radiation leakage from the antenna elements on the human body in the context of wearable applications. This study is conducted to the antenna performance when it is bent on a cylinder and compared to the flat case on four human body regions: arm, head, thigh, and chest. The proposed antenna based on PIN diodes is fabricated, measured, and tested. Using a 3D axis field strength meter, the proposed antenna system field strength is measured for different conditions at various locations of the human body. Finally, an excellent agreement is found between the obtained numerical results and measurements.

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“…In References , frequency reconfigurable antennas have been extensively employed in wireless communication system applications, especially in CR. Nonetheless, microstrip patch antennas has been reported in the literature to suffer from design and biasing complexity, large antenna size, low gain, low efficiency and difficult to implement switching techniques . In Table is demonstrated the advantages of using SIW cavity backed techniques compared to another technique such as Microstrip techniques, while Table shows the summary of previous researches in frequency reconfigurable for CR.…”

Section: Introductionmentioning

confidence: 99%

Substrate integrated waveguide cavity backed frequency reconfigurable antenna for cognitive radio applies to internet of things applications

Al-Fadhali

Majid

Omar

et al. 2019

Int J RF Microw Comput Aided Eng

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In this article, a new multiband frequency reconfigurable substrate integrated waveguide cavity slot antenna was designed using Computer Simulation Technology software tool for addressing the specific design challenges posed by the internet of things (IoT) based cognitive radio networks. Reconfiguration of frequency bands is achieved using PIN diodes. The antenna resonated at 2.624, 2. 664, 2.720, 2.752, 4.304, 4.532, 4.556, 5.236, 5.304, 5.368, 5.332, and 5.392 GHz. The resonant frequency capability and radiation performance are demonstrated by both simulations and measurements. The simulated and measured results were in agreement. The higher efficiency, gain and average bandwidth obtained are 90%, 8.2 dBi and 65 MHz, respectively. The compactness, integrity, reliability, and performance at various operating frequencies make the proposed antenna a good candidate for IoT applications.cognitive radio, frequency reconfigurable, internet of things, multiband, PIN diodes, SIW

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A compact monopole antenna with reconfigurable band notch for underlay cognitive radio applications

Cited by 5 publications

References 14 publications

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

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

Design of a Controllable Antenna Based on Embedded Differential PSK Modulation

Substrate integrated waveguide cavity backed frequency reconfigurable antenna for cognitive radio applies to internet of things applications

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