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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)
Conference Proceeding
Alkaraki, S., Kelly, J., Gao, Y., Stremsdoerfer, S., & Gayets, E. (2020). 5G mm-Wave MIMO Antenna with Beam Switching Capabilities Fabricated Using 3D Printing. In 2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting (1545-1546). https://doi.org/10.1109/IEEECONF35879.2020.9329899

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.