Zouhair Briqech

High-Efficiency 60-GHz Printed Yagi Antenna Array

A low-cost and highly efficient printed Yagi antenna structure with high radiation efficiency is presented. The proposed prototype consists of two stacked planar layers. The first layer electromagnetically couples energy to the printed Yagi array parasitic elements located on the second layer. A reduced-size 60-GHz prototype (1.0687 × 0.8015 cm2) is designed to operate over the Industrial, Scientific, and Medical (ISM) band. The measured impedance bandwidth is more than 5 GHz with a gain of 10 dB measured at 60 GHz. With these features, this antenna achieves a low profile that makes it suitable for millimeter-wave monolithic microwave integrated circuits (MMICs) packaging as well as for short-range wireless communications and imaging applications.

60 GHz Fermi tapered slot antenna with sin-corrugation

A low-cost, high gain and broadband 60 GHz Fermi tapered slot antenna with a sin-corrugation is presented. The novel corrugation design parameters provide a high flexibility to enhance antenna characteristics. The proposed antenna provides a gain of 18.8 dB at 60 GHz, a high total radiation efficiency of ~90%, and an impedance bandwidth covers the 50-70 GHz band. With these features, this antenna is suitable for unlicensed millimeter-wave ISM-band, wireless communications, and imaging applications.

Antipodal Fermi Tapered Slot Antenna for 60-GHz Band Applications

A 60-GHz antipodal Fermi tapered slot antenna (AFTSA) with sine corrugation is presented. It exhibits a flat measured gain of 18.8 dB with return loss better than 18 dB over a frequency range of 55-65 GHz. To further improve the antennas performance, two other shape-modified AFTSAs are presented: one with a delta-shaped slot and the other with a diamond-shaped slot and loaded with an elliptical-shaped dielectric. The diamond-shaped slot modified antenna maintains a measured gain of 20 dB with return loss better than 22 dB over the entire band. The overall efficiency is 93%. Good agreement between simulated and measured results is obtained.

4-elements MMW array with EBG feeding network

A broadband and high gain 4-elements Ka-band tapered slot antenna (TSA) array with an EBG feeding network is presented. The EBG feeding structure is designed to suppress the surface waves causing unbalanced power division and undesired mutual coupling between the output ports. The array design parameters are tuned to achieve a 20 dB gain at 30 GHz, and an impedance bandwidth covers the entire ka-band. The array exhibits a constant gain and a stable radiation pattern over the operating band which makes it suitable for millimeter-wave short distance wireless communications and imaging applications.

Wide-Scan MSC-AFTSA Array-Fed Grooved Spherical Lens Antenna for Millimeter-Wave MIMO Applications

A new three-element multi-sin-shape corrugated antipodal Fermi tapered slot antenna (MSC-AFTSA) array integrated with a grooved spherical (GS) lens operating at 57-64 GHz is introduced. Multicorrugated patterns are implemented to obtain better matching performance when the antenna feeds the GS lens with broadband coverage. An implemented design for grooving the lens profile presents a new principle to obtain an optimum focal point feed using the tapered slot antennas. This technique gives more freedom to enhance the Eand H-plane characteristics with a gain of 20 dB, radiation efficiency of 83% at 60 GHz, and wide angle multibeam coverage. It is a relatively small spherical-lens antenna with three feeds of MSC-AFTSA array, 44.2 × 51.6 × 25.4 mm3 in size. There is a good agreement between calculated and measured results. The proposed antenna prototype with its wide-scan performance is suitable for broadband multiple-input-multiple-output communication systems operating at millimeter-wave bands.

60 GHz dual-polarized 1 × 4 antipodal Fermi tapered slot antenna array

A broadband, high gain, and dual-polarized single-fed antipodal Fermi tapered slot antenna (AFTSA) with a sine shaped corrugation is presented. The proposed design is employed to realize 1×4 antenna array covering the frequency band from 55 GHz to 65 GHz. The array design achieves a 22.3 dB gain at 60 GHz with a total radiation efficiency of about 90%. The polarization diversity of this antenna makes it suitable for millimeter wave wireless communications, and imaging applications.

Low-cost 60 GHz printed Yagi antenna array

A low-cost, and broadband 60 GHz microstrip Yagi array antenna is presented. It consists of rectangular microstrip antenna with parasitic patches. It has gain of 10.3 dB achieved at 60 GHz, a high total radiation efficiency of ~96%, and an impedance bandwidth of ~19.4%, which covers the entire unlicensed 60-GHz millimeter-wave frequency range. With these features, this antenna is suitable for wireless communication, and imaging applications.

Low-Cost Wideband mm-Wave Phased Array Using the Piezoelectric Transducer for 5G Applications

This paper presents a 55–65 GHz 16-element beam-steering array with a low-cost piezoelectric transducer-controlled phase shifter employing a single printed circuit board substrate. An ultrawideband antipodal fermi tapered slot antenna element with sine corrugation is designed to achieve symmetric E- and H-plane radiation patterns. The array is fed with an amplitude taper wideband Y-junction power divider integrated with an electromagnetic bandgap structure surrounding the feeding network. The measured results show a wide impedance bandwidth of S11 < −10 dB covering the band 55–65 GHz. The array measured gain is around 20 dB with low radiation losses. The 60-GHz phased array’s wide BW coverage, high gain, low feeding network loss, low cost, and low profile should have wide applications in the development of ultrawideband millimeter-wave scanning systems for the fifth generation communication applications.

60 GHz multi sin-corrugations Antipodal Fermi tapered slot antenna loaded with a spherical lens

We propose a hybrid antenna composed of spherical lens fed by an Antipodal Fermi tapered slot antenna (AFTSA). The AFTSA has customized multi-sin-shape corrugated patterns. The corrugation steps are used to enhance E and H- plane characteristics and reduce the return loss. The loaded methodology of the conventional semispherical is compared with new slotted full spherical lens. The model design achieved a gain of 20dB and 83% of total radiation efficiency at 60 GHz. Thus, the proposed antenna can be implemented in millimeter wave wireless communications and imaging detection systems.

High gain antipodal tapered slot antenna With sine-shaped corrugation and fermi profile substrate slotted cut-out for MMW 5G

A high gain, high-efficiency antipodal tapered slot antenna with sine-shaped corrugation and a Fermi profile substrate cut-out has been developed for 5G millimeter wave (MMW) communications. A parametric study of a new substrate cutout with Fermi profile is demonstrated to reduce the sidelobe level at the E-plane and H-plane as well as to increase antenna efficiency by an average of 88% over a band of 20-40 GHz. A low-cost printed circuit board (PCB) is processed simply with a CNC Milling machine to fabricate the proposed antenna with Fermi profile substrate cut-out. The measured reflection coefficient is found to be less than -14 dB over a frequency range of 20-40 GHz. Furthermore, the measured gain of the proposed antenna is 17 dB at 30 GHz and the measured radiation pattern and gain is almost constant within the wide bandwidth from 30-40 GHz. Therefore, this antenna is proposed for use in an H-plane array structure such as for point-to-point communication systems, a switched-beam system.