Outputs (32)

Metasurface-Inspired Flexible Wearable MIMO Antenna Array for Wireless Body Area Network Applications and Biomedical Telemetry Devices (2022)
Journal Article
Althuwayb, A. A., Alibakhshikenari, M., Virdee, B. S., Rashid, N., Kaaniche, K., Ben Atitallah, A., … Falcone, F. (2022). Metasurface-Inspired Flexible Wearable MIMO Antenna Array for Wireless Body Area Network Applications and Biomedical Telemetry Dev

This article presents a sub-6GHz ISM-band flexible wearable MIMO antenna array for wireless body area networks (WBANs) and biomedical telemetry devices. The array is based on metasurface inspired technology. The antenna array consists of 2×2 matrix o... Read More about Metasurface-Inspired Flexible Wearable MIMO Antenna Array for Wireless Body Area Network Applications and Biomedical Telemetry Devices.

Review on Unmanned Aerial Vehicle Assisted Sensor Node Localization in Wireless Networks: Soft Computing Approaches (2022)
Journal Article
Annepu, V., Sona, D. R., Ravikumar, C., Bagadi, K., Alibakhshikenari, M., Althuwayb, A. A., Alali, B., Virdee, B. S., Pau, G., Dayoub, I., See, C. H., & Falcone, F. (2022). Review on Unmanned Aerial Vehicle Assisted Sensor Node Localization in Wireless Ne

Node positioning or localization is a critical requisite for numerous position-based applications of wireless sensor network (WSN). Localization using the unmanned aerial vehicle (UAV) is preferred over localization using fixed terrestrial anchor no... Read More about Review on Unmanned Aerial Vehicle Assisted Sensor Node Localization in Wireless Networks: Soft Computing Approaches.

Computer Vision Based Kidney’s (HK-2) Damaged Cells Classification with Reconfigurable Hardware Accelerator (FPGA) (2022)
Journal Article
Ghani, A., Hodeify, . R., See, C. H., Keates, S., Lee, D., & Bouridane, A. (2022). Computer Vision Based Kidney’s (HK-2) Damaged Cells Classification with Reconfigurable Hardware Accelerator (FPGA). Electronics, 11(24), Article 4234. https://doi.org/10.

In medical and health sciences, detection of cell injury plays an important role in diagnosis, personal treatment and disease prevention. Despite recent advancements in tools and methods for image classification, it is challenging to classify cell im... Read More about Computer Vision Based Kidney’s (HK-2) Damaged Cells Classification with Reconfigurable Hardware Accelerator (FPGA).

6G Wireless Communication Systems: Applications, Opportunities and Challenges (2022)
Journal Article
Anoh, K., See, C. H., Dama, Y., Abd-Alhameed, R. A., & Keates, S. (2022). 6G Wireless Communication Systems: Applications, Opportunities and Challenges. Future Internet, 14(12), Article 379. https://doi.org/10.3390/fi14120379

As the technical specifications of the 5th Generation (5G) wireless communication standard are being wrapped up, there are growing efforts amongst researchers, industrialists and standardisation bodies on the enabling technologies of a 6G standard or... Read More about 6G Wireless Communication Systems: Applications, Opportunities and Challenges.

Preparation of Elastomeric Nanocomposites Using Nanocellulose and Recycled Alum Sludge for Flexible Dielectric Materials (2022)
Journal Article
Sun, D., Saw, B. L., Onyianta, A. J., Wang, B., Wilson, C., O'Rourke, D., …Lu, Z. (2023). Preparation of Elastomeric Nanocomposites Using Nanocellulose and Recycled Alum Sludge for Flexible Dielectric Materials. Journal of Advanced Dielectrics, 13(01),

Flexible dielectric materials with environmental-friendly, low-cost and high-energy density characteristics are in increasing demand as the world steps into the new Industrial 4.0 era. In this work, an elastomeric nanocomposite was developed by incor... Read More about Preparation of Elastomeric Nanocomposites Using Nanocellulose and Recycled Alum Sludge for Flexible Dielectric Materials.

Four-Element/Eight-Port MIMO Antenna System with Diversity and Desirable Radiation for Sub 6 GHz Modern 5G Smartphones (2022)
Journal Article
Parchin, N. O., Amar, A. S., Darwish, M., Moussa, K. H., See, C. H., Abd-Alhameed, R. A., … Mohamed, H. G. (2022). Four-Element/Eight-Port MIMO Antenna System with Diversity and Desirable Radiation for Sub 6 GHz Modern 5G Smartphones. IEEE Access, 10, 1

In this manuscript, a multiple-input multiple-output (MIMO) antenna array system with identical compact antenna elements providing wide radiation and diversity function is introduced for sub 6 GHz fifth-generation (5G) cellular applications. The intr... Read More about Four-Element/Eight-Port MIMO Antenna System with Diversity and Desirable Radiation for Sub 6 GHz Modern 5G Smartphones.

Preparation of flexible dielectric nanocomposites using nanocellulose and recycled alum sludge for wearable technology applications (2022)
Journal Article
Sun, D., Saw, L., Onyianta, A., 'rourke, Lu, Z., Wilson, C., See, C. H., Popescu, C., Dorris, M., & Shyha, I. (2022). Preparation of flexible dielectric nanocomposites using nanocellulose and recycled alum sludge for wearable technology applications.

With the rapid development of wearable technology, flexible dielectric materials with environmental-friendly, low-cost and high-energy efficiency characteristics are in increasing demand. In this work, a flexible dielectric nanocomposite was develope... Read More about Preparation of flexible dielectric nanocomposites using nanocellulose and recycled alum sludge for wearable technology applications.

High Gain/Bandwidth Off-Chip Antenna Loaded with Metamaterial Unit-Cell Impedance Matching Circuit for Sub-Terahertz Near-Field Electronic Systems (2022)
Journal Article
Alibakhshikenari, M., Virdee, B. S., Mariyanayagam, D., Vadalà, V., Naser-Moghadasi, M., See, C. H., … Limiti, E. (2022). High Gain/Bandwidth Off-Chip Antenna Loaded with Metamaterial Unit-Cell Impedance Matching Circuit for Sub-Terahertz Near-Field El

An innovative off-chip antenna (OCA) is presented that exhibits high gain and efficiency performance at the terahertz (THz) band and has a wide operational bandwidth. The proposed OCA is implemented on stacked silicon layers and consists of an open c... Read More about High Gain/Bandwidth Off-Chip Antenna Loaded with Metamaterial Unit-Cell Impedance Matching Circuit for Sub-Terahertz Near-Field Electronic Systems.

Detection of Signals in MC–CDMA Using a Novel Iterative Block Decision Feedback Equalizer (2022)
Journal Article
Bagadi, K., Ravikumar, C., Sathish, K., Alibakhshikenari, M., Virdee, B. S., Kouhalvandi, L., Olan-Nuñez, . K. N., Pau, G., See, C. H., Dayoub, I., Livreri, . P., Aïssa, S., Falcone, F., & Limiti, E. (2022). Detection of Signals in MC–CDMA Using a No

This paper presents a technique to mitigate multiple access interference (MAI) in multicarrier code division multiple access (MC-CDMA) wireless communications systems. Although under normal circumstances the MC-CDMA system can achieve high spectral e... Read More about Detection of Signals in MC–CDMA Using a Novel Iterative Block Decision Feedback Equalizer.

On the Fast DHT Precoding of OFDM Signals over Frequency-Selective Fading Channels for Wireless Applications (2022)
Journal Article
Anoh, K., Tanriover, C., Ribeiro, M. V., Adebisi, B., & See, C. H. (2022). On the Fast DHT Precoding of OFDM Signals over Frequency-Selective Fading Channels for Wireless Applications. Electronics, 11(19), Article 3099. https://doi.org/10.3390/electronics

Due to high power consumption and other problems, it is unlikely that orthogonal frequency-division multiplexing (OFDM) would be included in the uplink of the future 6G standard. High power consumption in OFDM systems is motivated by the high peak-to... Read More about On the Fast DHT Precoding of OFDM Signals over Frequency-Selective Fading Channels for Wireless Applications.

Detection of Ethanol Concentration in Liquid Using a Double-Layered Resonator Operating at 5G-mm-Wave Frequencies (2022)
Journal Article
Qureshi, S. A., Abidin, Z. Z., Majid, H. A., Ashyap, A. Y. I., & See, C. H. (2022). Detection of Ethanol Concentration in Liquid Using a Double-Layered Resonator Operating at 5G-mm-Wave Frequencies. Journal of Electronic Materials, 51, 7028-7036. https://

A new sensing technique for rapidly detecting ethanol concentration in aqueous solutions based on electromagnetic resonance is discussed. The sensor has two substrate layers and operates at 5G-mm-wave frequencies. An experimental study of the new res... Read More about Detection of Ethanol Concentration in Liquid Using a Double-Layered Resonator Operating at 5G-mm-Wave Frequencies.

Vertically-Polarized/End-Fire Phased Array with Folded-Slot Resonators for Cellular Communications (2022)
Presentation / Conference Contribution
Parchin, N. O., Amar, A. S., Abdel-Rahman, A. S., Adel, A., See, C. H., Abdul-Al, M., & Abd-Alhameed, R. A. (2022, July). Vertically-Polarized/End-Fire Phased Array with Folded-Slot Resonators for Cellular Communications. Presented at 2022 International T

This study aims to introduce a new phased array design with end-fire and vertically-polarized radiation for future cellular networks. The procedure of the array design is simple, accomplished on a single layer substrate material. Its schematic involv... Read More about Vertically-Polarized/End-Fire Phased Array with Folded-Slot Resonators for Cellular Communications.

Super-Wideband and Highly-Miniaturized Phased Array for MM-Wave Smartphone Applications (2022)
Presentation / Conference Contribution
Amar, A. S., Darwish, M., Parchin, N. O., See, C. H., Ghareeb, M. F., Abd-Alhameed, R. A., & El-Hennawy, H. (2022, July). Super-Wideband and Highly-Miniaturized Phased Array for MM-Wave Smartphone Applications. Presented at 2022 International Telecommunic

This paper aims to investigate of new phased array design and its radiation characteristics with highly-miniaturized and super-wideband (SWB) properties. The procedure of the phased array design is simple and can be directly performed on a single-lay... Read More about Super-Wideband and Highly-Miniaturized Phased Array for MM-Wave Smartphone Applications.

A New Multiple Slot Antenna System for Sub 6 GHz Smartphones (2022)
Presentation / Conference Contribution
Parchin, N. O., Amar, A. S., Darwish, M., See, C. H., Abd-Alhameed, R. A., Almslmany, A., & El-Hennawy, H. (2022, July). A New Multiple Slot Antenna System for Sub 6 GHz Smartphones. Presented at 2022 International Telecommunications Conference (ITC-Egypt

This work presents a sub-6 GHz multiple-input multiple-output (MIMO) antenna array with sufficient characteristics for mobile phone applications. At the four corners of the mobile phone mainboard, there are eight compact hook-shaped slot antennas mou... Read More about A New Multiple Slot Antenna System for Sub 6 GHz Smartphones.

Gain Enhancement of Diversity Slot Antenna Using FSS with Metamaterial Unit Cells for UWB Systems (2022)
Presentation / Conference Contribution
Parchin, N. O., Ullah, A., Santos, H. M. D., See, C. H., & Abd-Alhameed, R. A. (2022, June). Gain Enhancement of Diversity Slot Antenna Using FSS with Metamaterial Unit Cells for UWB Systems. Presented at 2022 IEEE Wireless Antenna and Microwave Symposium

This study represents the design of a dual-port/diversity antenna with enhanced gain property ultra-wideband (UWB) systems. It contains a small-size open-ended slot resonator fed by a pair of semi-arc feed-lines providing radiation/polarization diver... Read More about Gain Enhancement of Diversity Slot Antenna Using FSS with Metamaterial Unit Cells for UWB Systems.

Low-Profile MM-Wave PIFA Array with Omni-Directional and Full-Coverage Radiations (2022)
Presentation / Conference Contribution
Ullah, A., Parchin, N. O., Santos, H. M. D., See, C. H., & Abd-Alhameed, R. A. (2022, June). Low-Profile MM-Wave PIFA Array with Omni-Directional and Full-Coverage Radiations. Presented at 2022 IEEE Wireless Antenna and Microwave Symposium (WAMS), Rourkel

This manuscript studies the design and radiation characteristics of a new phased array with highly-miniaturized broadband and omnidirectional radiation properties. The procedure of the phased array design is simple and can be easily accomplished on a... Read More about Low-Profile MM-Wave PIFA Array with Omni-Directional and Full-Coverage Radiations.

A Compact Wideband Circularly Polarized Planar Monopole Antenna with Axial Ratio Bandwidth Entirely Encompassing the Antenna Bandwidth (2022)
Journal Article
Mousa, F. M., Al-Yasir, Y. I. A., Ali, N. T., Gharbia, I., See, C. H., & Abd-Alhameed, R. (2022). A Compact Wideband Circularly Polarized Planar Monopole Antenna with Axial Ratio Bandwidth Entirely Encompassing the Antenna Bandwidth. IEEE Access, 10, 8182

The antenna presented in this study is a compact wideband monopole with wideband circular polarization that can be used across the whole antenna bandwidth. A rectangular C-shaped patch is partially covered by a ground plane in the proposed planar mon... Read More about A Compact Wideband Circularly Polarized Planar Monopole Antenna with Axial Ratio Bandwidth Entirely Encompassing the Antenna Bandwidth.

Microwave sensor for liquid mixture identification based on composite right left hand-zero-order resonator for sensitivity improvement (2022)
Journal Article
Hocine, S., Lashab, . M., Belattar, M., Ouchtati, S., See, C. H., Hu, Y., & Abd-Alhameed, R. A. (2022). Microwave sensor for liquid mixture identification based on composite right left hand-zero-order resonator for sensitivity improvement. International J

This work aims to present an improved version of the liquid mixture identification sensor, the proposed sensor is tested experimentaly on mixture of water ethanol, the identification of liquid is based on the measurement of frequency displacement, a... Read More about Microwave sensor for liquid mixture identification based on composite right left hand-zero-order resonator for sensitivity improvement.

Glucose level detection using millimetre-wave metamaterial-inspired resonator (2022)
Journal Article
Qureshi, S. A., Abidin, Z. Z., Elamin, N. I. M., A. Majid, H., Ashyap, A. Y. I., Nebhen, J., Kamarudin, M. R., See, C. H., & Abd-Alhameed, R. A. (2022). Glucose level detection using millimetre-wave metamaterial-inspired resonator. PLOS ONE, 17(6), Articl

Millimetre-wave frequencies are promising for sensitive detection of glucose levels in the blood, where the temperature effect is insignificant. All these features provide the feasibility of continuous, portable, and accurate monitoring of glucose le... Read More about Glucose level detection using millimetre-wave metamaterial-inspired resonator.

Using Deep Neural Networks to Classify Symbolic Road Markings for Autonomous Vehicles (2022)
Journal Article
Suarez-Mash, D., Ghani, A., See, C. H., Keates, S., & Yu, H. (2022). Using Deep Neural Networks to Classify Symbolic Road Markings for Autonomous Vehicles. EAI Endorsed Transactions on Industrial Networks and Intelligent Systems, 9(31), Article e2. https:

To make autonomous cars as safe as feasible for all road users, it is essential to interpret as many sources of trustworthy information as possible. There has been substantial research into interpreting objects such as traffic lights and pedestrian i... Read More about Using Deep Neural Networks to Classify Symbolic Road Markings for Autonomous Vehicles.

A New mmWave Antenna Array with Wideband Characteristics for Next Generation Communication Systems (2022)
Journal Article
Munir, M. E., Al Harbi, A. G., Kiani, S. H., Marey, M., Parchin, N. O., Mostafa, H., Iqbal, J., Abbas Khan, M., See, C. H., & Abd-Alhameed, R. A. (2022). A New mmWave Antenna Array with Wideband Characteristics for Next Generation Communication Systems. E

This paper presents a planar multi-circular loop antenna with wide impedance bandwidth for next generation mm-wave systems. The proposed antenna comprises three circular rings with a partial ground plane having a square slot. The resonating structure... Read More about A New mmWave Antenna Array with Wideband Characteristics for Next Generation Communication Systems.

An Innovative Antenna Array with High Inter Element Isolation for Sub-6 GHz 5G MIMO Communication Systems (2022)
Journal Article
Alibakhshikenari, M., S. Virdee, B., Benetatos, H., Mousa Ali, E., Soruri, M., Dalarsson, M., Naser-Moghadasi, M., See, C. H., Pietrenko-Dabrowska, A., Koziel, S., Szczepanski, S., & Limiti, E. (2022). An Innovative Antenna Array with High Inter Element

A novel technique is shown to improve the isolation between radiators in antenna arrays. The proposed technique suppresses the surface-wave propagation and reduces substrate loss thereby enhancing the overall performance of the array. This is achieve... Read More about An Innovative Antenna Array with High Inter Element Isolation for Sub-6 GHz 5G MIMO Communication Systems.

Single-Element and MIMO Circularly Polarized Microstrip Antennas with Negligible Back Radiation for 5G Mid-Band Handsets (2022)
Journal Article
Alnahwi, F. M., Al-Yasir, Y. I. A., See, C. H., & Abd-Alhameed, R. A. (2022). Single-Element and MIMO Circularly Polarized Microstrip Antennas with Negligible Back Radiation for 5G Mid-Band Handsets. Sensors, 22(8), Article 3067. https://doi.org/10.3390/s

In this paper, single-element and MIMO microstrip antenna with two pairs of unequal slits is proposed as a circularly polarized antenna with negligible back radiation for 5G mid-band handsets. The unequal pairs of slits are engraved on the antenna pa... Read More about Single-Element and MIMO Circularly Polarized Microstrip Antennas with Negligible Back Radiation for 5G Mid-Band Handsets.

Accelerated Diagnosis of Novel Coronavirus (COVID-19)—Computer Vision with Convolutional Neural Networks (CNNs) (2022)
Journal Article
Ghani, A., Aina, A., See, C. H., Yu, H., & Keates, S. (2022). Accelerated Diagnosis of Novel Coronavirus (COVID-19)—Computer Vision with Convolutional Neural Networks (CNNs). Electronics, 11(7), Article 1148. https://doi.org/10.3390/electronics11071148

Early detection and diagnosis of COVID-19, as well as exact separation of non-COVID-19 cases in a non-invasive manner in the earliest stages of the disease, are critical concerns in the current COVID-19 pandemic. Convolutional Neural Network (CNN) ba... Read More about Accelerated Diagnosis of Novel Coronavirus (COVID-19)—Computer Vision with Convolutional Neural Networks (CNNs).

Design of an Analog RFID-Based UHF Band Tag Antenna with Opened Circuited L-shaped Stubs for the Applications in Localization (2022)
Journal Article
Jouali, R., Aoutoul, M., Ouahmane, . H., Ahmad, S., Had, A., El Moukhtafi, F., Ojaroudi Parchin, N., See, C. H., & Abd-Alhameed, R. (2022). Design of an Analog RFID-Based UHF Band Tag Antenna with Opened Circuited L-shaped Stubs for the Applications in L

This paper presents a new analog design of a radio-frequency identification (RFID) tag antenna with a long-read range oriented to localization applications. The actual work focuses on the analog input characterization of antenna impedance by studying... Read More about Design of an Analog RFID-Based UHF Band Tag Antenna with Opened Circuited L-shaped Stubs for the Applications in Localization.

Dual-Band Phased Array 5G Mobile-Phone Antenna with Switchable and Hemispherical Beam Pattern Coverage for MIMO-Diversity Communications (2022)
Journal Article
Parchin, N. O., Dardeer, O. M., Amar, A. S. I., Hwang See, C., & Abd-Alhameed, R. (2022). Dual-Band Phased Array 5G Mobile-Phone Antenna with Switchable and Hemispherical Beam Pattern Coverage for MIMO-Diversity Communications. The Applied Computational E

A new design of dual-band antenna array with 3D-coverage beam steering characteristic for millimeter-wave (MM-Wave) communications is proposed in this manuscript. The antenna covers frequency bands of 18 GHz and 28 GHz. Its configuration contains thr... Read More about Dual-Band Phased Array 5G Mobile-Phone Antenna with Switchable and Hemispherical Beam Pattern Coverage for MIMO-Diversity Communications.

A High Gain Multiband Offset MIMO Antenna Based on a Planar Log-Periodic Array for Ku/K-band Applications (2022)
Journal Article
M. Fakharian, M., Alibakhshikenari, . M., See, C. H., & Abd-Alhameed, R. (2022). A High Gain Multiband Offset MIMO Antenna Based on a Planar Log-Periodic Array for Ku/K-band Applications. Scientific Reports, 12, Article 4044. https://doi.org/10.1038/s415

An offset quad-element, two-port, high-gain, and multiband multiple-input multiple-output (MIMO) planar antenna based on a log-periodic dipole array (LPDA) for Ku/K-band wireless communications is proposed, in this paper. A single element antenna has... Read More about A High Gain Multiband Offset MIMO Antenna Based on a Planar Log-Periodic Array for Ku/K-band Applications.

A Novel Meander Bowtie-Shaped Antenna with Multi-Resonant and Rejection Bands for Modern 5G Communications (2022)
Journal Article
Faouri, Y. S., Ahmad, S., Ojaroudi Parchin, N., See, C. H., & Abd-Alhameed, R. (2022). A Novel Meander Bowtie-Shaped Antenna with Multi-Resonant and Rejection Bands for Modern 5G Communications. Electronics, 11(5), Article 821. https://doi.org/10.3390/ele

To support various fifth generation (5G) wireless applications, a small, printed bowtie-shaped microstrip antenna with meandered arms is reported in this article. Because it spans the broad legal range, the developed antenna can serve or reject a var... Read More about A Novel Meander Bowtie-Shaped Antenna with Multi-Resonant and Rejection Bands for Modern 5G Communications.

Wireless Electromagnetic Radiation Assessment Based on the Specific Absorption Rate (SAR): A Review Case Study (2022)
Journal Article
Abdul-Al, M., Amar, A. S., Elfergani, I., Littlehales, R., Parchin, N., Al-Yasir, Y., See, C. H., Zhou, D., Binti Zainal Abidin, Z., Alibakhshikenari, M., Zebiri, C., Elmegri, F., Abusitta, M., Ullah, A., Abdussalam, F. M., Rodriguez, J., McEwan, N. J., N

Employing Electromagnetic Fields (EMFs) in new wireless communication and sensing technologies has substantially increased the level of human exposure to EMF waves. This paper presents a useful insight into the interaction of electromagnetic fields w... Read More about Wireless Electromagnetic Radiation Assessment Based on the Specific Absorption Rate (SAR): A Review Case Study.

F-Shape Dual-Band MIMO Antenna System for Next- Generation Smartphone Applications (2022)
Presentation / Conference Contribution
Ullah, A., Parchin, N. O., Mannan, W., Al-Yasir, I. A., See, C. H., Hu, Y. F., & Abd-Alhameed, R. A. (2021, September). F-Shape Dual-Band MIMO Antenna System for Next- Generation Smartphone Applications. Presented at 2nd International Multi-disciplinary C

In this paper, a new F-shape 6-element dual-band multiple-input multiple-output (MIMO) antenna operating in a 5G band for smartphone mobile is presented. The antenna contains six antenna elements covering a dual-frequency range including 3.42-3.77 GH... Read More about F-Shape Dual-Band MIMO Antenna System for Next- Generation Smartphone Applications.

Double-Layered Metamaterial Resonator Operating At Millimetre Wave FOR Detection Of Dengue Virus (2022)
Journal Article
Qureshi, S. A., Abidin, Z., Majid, H. A., Ashyap, A. Y., & See, C. H. (2022). Double-Layered Metamaterial Resonator Operating At Millimetre Wave FOR Detection Of Dengue Virus. International journal of electronics and communications = Archiv fur Elektronik

In this paper, a metamaterial-based resonator is proposed for the detection of dengue infection. The replaceable top layer can measure the dielectric characteristics of blood samples to detect the dengue virus. The sensor observed a shift in the reso... Read More about Double-Layered Metamaterial Resonator Operating At Millimetre Wave FOR Detection Of Dengue Virus.

A Jug-Shaped CPW-Fed Ultra-Wideband Printed Monopole Antenna for Wireless Communications Networks (2022)
Journal Article
Ahmad, S., Ijaz, U., Naseer, S., Ghaffar, A., Qasim, M. A., Abrar, F., Parchin, N. O., Hwang See, C., & Abd-Alhameed, R. (2022). A Jug-Shaped CPW-Fed Ultra-Wideband Printed Monopole Antenna for Wireless Communications Networks. Applied Sciences, 12(2), Ar

A type of telecommunication technology called an ultra-wideband (UWB) is used to provide a typical solution for short-range wireless communication due to large bandwidth, low power consumption in transmission and reception. Printed monopole antennas... Read More about A Jug-Shaped CPW-Fed Ultra-Wideband Printed Monopole Antenna for Wireless Communications Networks.