All Outputs (40)

Liquid Metal Enabled SIW Vias and RF Blocking Walls for Reconfigurable Antennas (2022)
Presentation / Conference Contribution
Alkaraki, S., Qu, Z., Kelly, J., Borja, A. L., Mittra, R., & Wang, Y. (2022, March). Liquid Metal Enabled SIW Vias and RF Blocking Walls for Reconfigurable Antennas. Presented at 2022 16th European Conference on Antennas and Propagation (EuCAP), Madrid, Spain

This paper presents a method for designing reconfigurable microwave devices based on substrate integrated waveguides (SIW) technology. The method involves forming walls from drill holes that can be filled with liquid metal to form vias. Furthermore,... Read More about Liquid Metal Enabled SIW Vias and RF Blocking Walls for Reconfigurable Antennas.

Phase Reconfiguration via SIW Structures Filled with Liquid Metal (2022)
Presentation / Conference Contribution
Alkaraki, S., Borja, A. L., Kelly, J., Jilani, S. F., Mittra, R., & Gao, Y. (2022, March). Phase Reconfiguration via SIW Structures Filled with Liquid Metal. Presented at 2022 16th European Conference on Antennas and Propagation (EuCAP), Madrid, Spain

This paper presents substrate integrated waveguide (SIW) phase shifter that can be reconfigured using liquid metal. The phase shifter is developed to be used for antenna applications. This digital phase shifter incorporates a series of holes which ca... Read More about Phase Reconfiguration via SIW Structures Filled with Liquid Metal.

Reconfigurable Antenna Using Liquid Metal Vias (2021)
Presentation / Conference Contribution
Alkaraki, S., Kelly, J., & Wang, Z. (2021, December). Reconfigurable Antenna Using Liquid Metal Vias. Presented at 2021 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, APS/URSI 2021 - Proceedings, Singapore, Singapore

This paper presents a moderately high directivity (10 dBi) antenna having a reconfigurable radiation pattern. Specifically, the direction of the main beam can be altered. The radiation pattern control is achieved with the aid of a single-pole triple-... Read More about Reconfigurable Antenna Using Liquid Metal Vias.

A Biodegradable Textile-based Graphene Antenna for 5G Wearable Applications (2021)
Presentation / Conference Contribution
Nemet, A., Alkaraki, S., H. Abassi, Q., & Fizzah Jilani, S. (2021, December). A Biodegradable Textile-based Graphene Antenna for 5G Wearable Applications. Presented at 2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI), Singapore, Singapore

This paper presents a textile-based antenna for the currently deployed fifth-generation (5G) wireless bands. The proposed antenna consists of a coplanar-waveguide (CPW)-fed patch with truncated sides and a pair of L-shaped stubs as a part of ground g... Read More about A Biodegradable Textile-based Graphene Antenna for 5G Wearable Applications.

Reconfigurable Liquid Metal-Based SIW Phase Shifter (2021)
Journal Article
Alkaraki, S., Borja, A. L., Kelly, J. R., Mittra, R., & Gao, Y. (2022). Reconfigurable Liquid Metal-Based SIW Phase Shifter. IEEE Transactions on Microwave Theory and Techniques, 70(1), 323-333. https://doi.org/10.1109/TMTT.2021.3124797

This article presents the first substrate integrated waveguide (SIW) phase shifter that can be reconfigured using liquid metal (LM). This digital phase shifter exhibits low insertion loss and is reciprocal and bidirectional. It incorporates a series... Read More about Reconfigurable Liquid Metal-Based SIW Phase Shifter.

Radiation Pattern Reconfigurable Antenna Using Liquid Metal Vias (2021)
Presentation / Conference Contribution
Alkaraki, S., Kelly, J., & Allayioti, M. (2021, August). Radiation Pattern Reconfigurable Antenna Using Liquid Metal Vias. Presented at 2021 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications, APWC 2021, Honolulu, HI, USA

This paper presents a moderately high directivity (∼12 dBi) antenna having a reconfigurable radiation pattern. The proposed antenna, illustrated in Fig. 1 , is closely based on existing designs [1]-[2]. The proposed antenna consists of a driven eleme... Read More about Radiation Pattern Reconfigurable Antenna Using Liquid Metal Vias.

8 X 4 mm-Wave 3D Printed MIMO Antenna for 5G Wireless Communication (2021)
Presentation / Conference Contribution
Alkaraki, S., Jilani, S. F., Kelly, J., Gao, Y., Stremsdoerfer, S., & Gayets, E. D. (2021, March). 8 X 4 mm-Wave 3D Printed MIMO Antenna for 5G Wireless Communication. Presented at 15th European Conference on Antennas and Propagation, EuCAP 2021, Dusseldorf, Germany

A 3D printed 8 X 4 mm-wave multiple input multiple output (MIMO) antenna is presented in this paper. The proposed MIMO has an overall dimensions of 106.3 mm X 75.7 mm and it operates at 28 GHz mm-wave band. The proposed MIMO consists of 32 single ele... Read More about 8 X 4 mm-Wave 3D Printed MIMO Antenna for 5G Wireless Communication.

Miniaturized Meander-Line Dipole Antenna for Short-Range Wireless Communication Networks (2021)
Presentation / Conference Contribution
Jilani, S. F., Maskay, A., Alkaraki, S., Abbasi, Q. H., & Alomainy, A. (2021, March). Miniaturized Meander-Line Dipole Antenna for Short-Range Wireless Communication Networks. Presented at 15th European Conference on Antennas and Propagation, EuCAP 2021, Dusseldorf, Germany

This paper presents the design and performance analysis of a planar, miniaturized meander-line dipole antenna designed for short-range wireless communication links. The proposed compact antenna has a size of 0.08λo × 0.03λo (at fo = 288 MHz) and desi... Read More about Miniaturized Meander-Line Dipole Antenna for Short-Range Wireless Communication Networks.

High Gain 3D Printed Antenna with Corrugations and High Aperture Efficiency Performance (2021)
Presentation / Conference Contribution
Alkaraki, S., Kelly, J., Parini, C., Gao, Y., Stremsdoerfer, S., & Gayets, E. (2020, July). High Gain 3D Printed Antenna with Corrugations and High Aperture Efficiency Performance. Presented at 2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, Montreal, QC, Canada

This paper presents a 3D printed antenna for X-band applications. The antenna is compact and it has high measured gain performance with high aperture efficiency over wide bandwidth covers 5 GHz. The proposed antenna consists of two layers stacked on... Read More about High Gain 3D Printed Antenna with Corrugations and High Aperture Efficiency Performance.

Gallium-Based Liquid Metal Substrate Integrated Waveguide Switches (2020)
Journal Article
Alkaraki, S., Kelly, J., Borja, A. L., Mittra, R., & Wang, Y. (2021). Gallium-Based Liquid Metal Substrate Integrated Waveguide Switches. IEEE Microwave and Wireless Components Letters, 31(3), 257-260. https://doi.org/10.1109/LMWC.2020.3040795

This letter presents a new approach for reconfiguring substrate integrated waveguide (SIW) devices. It involves allowing or prohibiting the wave propagation by using a removable wall which is built from a series of drill holes. When the wall is requi... Read More about Gallium-Based Liquid Metal Substrate Integrated Waveguide Switches.

3D-printed millimetre-wave antennas with spray-coated metalization (2020)
Book Chapter
Alkaraki, S., Kelly, J., & Yue Gao. (2020). 3D-printed millimetre-wave antennas with spray-coated metalization. In Q. H. Abbasi, S. Fizzah Jilani, A. Alomainy, & M. Ali Imran (Eds.), Antennas and Propagation for 5G and Beyond (67-99). Institution of Engineering and Technology (IET). https://doi.org/10.1049/pbte093e_ch4

This chapter is concerned with corrugated plate antennas. The corrugated plate antennas, presented here, consist of a resonant slot formed within a metallic plate. The resonant slot is surrounded by a rectangular cavity and corrugations. Subwavelengt... Read More about 3D-printed millimetre-wave antennas with spray-coated metalization.

5G mm-Wave MIMO Antenna with Beam Switching Capabilities Fabricated Using 3D Printing (2020)
Presentation / Conference Contribution
Alkaraki, S., Kelly, J., Gao, Y., Stremsdoerfer, S., & Gayets, E. (2020, July). 5G mm-Wave MIMO Antenna with Beam Switching Capabilities Fabricated Using 3D Printing. Presented at 2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, Montreal, QC, Canada

This paper presents a MIMO antenna for 5G mm-wave applications. The proposed MIMO is capable of providing continues beam cover in the elevation for up to ± 30° without using phase shifters. The proposed MIMO is fabricated using 3D printing and it has... Read More about 5G mm-Wave MIMO Antenna with Beam Switching Capabilities Fabricated Using 3D Printing.

Mm-Wave Low-Cost 3D Printed MIMO Antennas with Beam Switching Capabilities for 5G Communication Systems (2020)
Journal Article
Alkaraki, S., & Gao, Y. (2020). Mm-Wave Low-Cost 3D Printed MIMO Antennas with Beam Switching Capabilities for 5G Communication Systems. IEEE Access, 8, 32531-32541. https://doi.org/10.1109/ACCESS.2020.2973087

This paper presents designs and prototypes of low cost multiple input multiple output (MIMO) antennas for 5G and millimetre-wave (mm-wave) applications. The proposed MIMOs are fabricated using 3D printing and are able deliver beams in multiple direct... Read More about Mm-Wave Low-Cost 3D Printed MIMO Antennas with Beam Switching Capabilities for 5G Communication Systems.

3D Printed Corrugated Plate Antennas with High Aperture Efficiency and High Gain at X-Band and Ka-Band (2020)
Journal Article
Alkaraki, S., Gao, Y., Stremsdoerfer, S., Gayets, E., & Parini, C. G. (2020). 3D Printed Corrugated Plate Antennas with High Aperture Efficiency and High Gain at X-Band and Ka-Band. IEEE Access, 8, 30643-30654. https://doi.org/10.1109/ACCESS.2020.2972101

A design criterion for a compact 3D printed high gain corrugated plate antenns that has high aperture efficiency and wide bandwidth is presented in this paper. The proposed design criterion is validated numerically and experimentally by fabricating 3... Read More about 3D Printed Corrugated Plate Antennas with High Aperture Efficiency and High Gain at X-Band and Ka-Band.

3D Printed Antennas Metallized Using Conductive Paint at X-Band (2019)
Presentation / Conference Contribution
Shaker, A., Yue, G., Samuel, S., Edouard des, G., & Clive, P. (2019, March). 3D Printed Antennas Metallized Using Conductive Paint at X-Band. Presented at 2019 13th European Conference on Antennas and Propagation (EuCAP), Krakow, Poland

This paper presents performance evaluation of 3D printed antennas that operate at X-band and metallized using simple and low cost methods. The proposed 3D printed antennas operate at 10 GHz and they are metallized using different low cost conductive... Read More about 3D Printed Antennas Metallized Using Conductive Paint at X-Band.

Radiation Energy and Mutual Coupling Evaluation for Multimode MIMO Antenna Based on the Theory of Characteristic Mode (2018)
Journal Article
Su, W., Zhang, Q., Alkaraki, S., Zhang, Y., Zhang, X.-Y., & Gao, Y. (2019). Radiation Energy and Mutual Coupling Evaluation for Multimode MIMO Antenna Based on the Theory of Characteristic Mode. IEEE Transactions on Antennas and Propagation, 67(1), 74-84. https://doi.org/10.1109/TAP.2018.2878078

This paper presents a novel method to evaluate radiation energy and mutual coupling in multimode antennas. Based on the theory of characteristics mode, how much each mode occupies the radiation and the mutual coupling from each feeding port is calcul... Read More about Radiation Energy and Mutual Coupling Evaluation for Multimode MIMO Antenna Based on the Theory of Characteristic Mode.

Performance Comparison of Simple and Low Cost Metallization Techniques for 3D Printed Antennas at 10 GHz and 30 GHz (2018)
Journal Article
Alkaraki, S., Gao, Y., Munoz Torrico, M. O., Stremsdoerfer, S., Gayets, E., & Parini, C. (2018). Performance Comparison of Simple and Low Cost Metallization Techniques for 3D Printed Antennas at 10 GHz and 30 GHz. IEEE Access, 6, 64261-64269. https://doi.org/10.1109/ACCESS.2018.2874566

We investigate the performance of several metallization techniques for 3-D printed antennas at 10 and 30 GHz. The investigated techniques reduce the complexity and the overall cost of the metallization process. The first investigated technique is cal... Read More about Performance Comparison of Simple and Low Cost Metallization Techniques for 3D Printed Antennas at 10 GHz and 30 GHz.

High aperture efficient slot antenna surrounded by the cavity and narrow corrugations at Ka‐band and Ku‐band (2018)
Journal Article
Alkaraki, S., Gao, Y., & Parini, C. (2018). High aperture efficient slot antenna surrounded by the cavity and narrow corrugations at Ka‐band and Ku‐band. IET Microwaves, Antennas and Propagation, 12(12), 1926-1931. https://doi.org/10.1049/iet-map.2018.0060

A design criterion for a small, compact, high-aperture-efficient antenna is proposed in this study. The proposed criterion is validated experimentally through fabricating and testing two prototypes for Ku-band and Ka-band applications. The proposed a... Read More about High aperture efficient slot antenna surrounded by the cavity and narrow corrugations at Ka‐band and Ku‐band.

Compact and Low-Cost 3-D Printed Antennas Metalized Using Spray-Coating Technology for 5G mm-Wave Communication Systems (2018)
Journal Article
Alkaraki, S., Andy, A. S., Gao, Y., Tong, K. F., Ying, Z., Donnan, R., & Parini, C. (2018). Compact and Low-Cost 3-D Printed Antennas Metalized Using Spray-Coating Technology for 5G mm-Wave Communication Systems. IEEE Antennas and Wireless Propagation Letters, 17(11), 2051-2055. https://doi.org/10.1109/LAWP.2018.2848912

This letter presents a design of two compact, light, rigid, and low-cost three-dimensionally (3-D) printed millimeter-wave antennas for a fifth-generation (5G) communication system. The proposed antennas consist of a radiating slot that is surrounded... Read More about Compact and Low-Cost 3-D Printed Antennas Metalized Using Spray-Coating Technology for 5G mm-Wave Communication Systems.

Dual-Layer Corrugated Plate Antenna (2017)
Journal Article
Alkaraki, S., Gao, Y., & Parini, C. (2017). Dual-Layer Corrugated Plate Antenna. IEEE Antennas and Wireless Propagation Letters, 16, 2086-2089. https://doi.org/10.1109/lawp.2017.2696420

This letter presents a subwavelength slot-fed high-gain dual-layer corrugated plate antenna for X-band applications. The antenna is realized by placing a second corrugated layer that has three radiating slots on top of the traditional corrugated plat... Read More about Dual-Layer Corrugated Plate Antenna.