IEEE Transactions on Vehicular Technology, 70(5), 4088–4097. A dual-band shared-aperture antenna with wide-angle scanning capability for mobile system applications. IEEE Antennas and Wireless Propagation Letters, 18(4), 606–610. SIW-based leaky-wave antenna supporting wide range of beam scanning through broadside. ![]() IEEE Antennas and Wireless Propagation Letters, 19(1), 89–93. Continuous backward-to-forward scanning 1-D slot-array leaky-wave antenna with improved gain. IEEE Transactions on Vehicular Technology, 70(6), 5419–5430. A singly-fed dual-band microstrip antenna for microwave and millimeter-wave applications in 5G wireless communication. A CPW-fed wearable antenna at ISM band for biomedical and WBAN applications. IEEE Antennas and Wireless Propagation Letters, 20(4), 592–596. A transversal single-beam EH0-mode microstrip leaky wave antenna on coupled microstrip lines under differential operation. IEEE Antennas and Wireless Propagation Letters, 19(12), 2363–2367.ĭuan, J., & Zhu, L. Microstrip-line EH1/EH2-mode leaky-wave antennas with backward-to-forward scanning. IEEE Antennas and Wireless Propagation Letters, 20(1), 33–37. Partially filled half-mode substrate integrated waveguide leaky-wave antenna for 24 GHz automotive radar. The complete antenna comprises a feed antenna part (A–F layers), a 5 × 5 metallic aperture-FSS part (G layer), and a standard WM-864 rectangular waveguide with UG-387/U flange.Kapusuz, K. The proposed antenna with aperture-FSS layer is fabricated and assembled, which is shown in Fig. The ultraviolet (UV) laser beam wavelength (λ = 355 nm in the UV spectrum), is focused on each brass metal layer individually having a different thickness to obtain the desired dimension, with the appropriate settings, such as laser cutting speed of 200 mm/s, and a laser spot size of 20 µm. All brass metal layers are fixed by using four plastic screws as shown in Fig. This brass is often used as a laser-cut metal, which is a highly reflective material. The seven brass metal layers needed for one antenna assembly, having different thicknesses as shown in Table 1, have been used to manufacture the proposed 300 GHz FPC antenna are shown in Fig. Fabry–Perot (FP) resonance condition 13 must be satisfied and is determined by the following equation:Ī laser cutting brass technology has been used for each metal layer in the proposed antenna using LPKF ProtoLaser U4 laser machine with technical support from M2ARS (Ch. ![]() The aperture-FSS layer works in a standing-wave environment (i.e., inside a resonant cavity). ![]() The geometrical parameters of the square apertures in the FSS layer are adjusted to alter the magnitude and phase of incident electromagnetic fields, to achieve highly directivity radiation patterns performance as explained in the above section. The aperture-FSS layer (layer G), consisting of an array of the aperture with a periodicity of ‘ \(p\)’ between each aperture element. The total height of the antenna is 1.24 \(\), respectively shown in Table 1. The proposed antenna has a compact size, low fabrication cost, high gain, and wide operating bandwidth. The measured radiation pattern shows a highly directive pattern with a cross-polarization level below − 25 dB over the whole band in all cut planes, which confirms with the simulation results. ![]() The maximum measured gain observed is 17.7 dBi at 289 GHz, and the gain is higher than 14.4 dBi from 285 to 310 GHz. The proposed antenna has a measured reflection coefficient below − 10 dB from 282 to 304 GHz with a bandwidth of 22 GHz. For verification, the proposed sub-terahertz (THz) FPC antenna prototype was developed, fabricated, and measured. The proposed aperture-FSS function acts as a partially reflective surface, contributing to a directive beam radiation. The proposed antenna consists of seven metallic layers a ground layer, an integrated stepped horn element (three-layers), a coupling layer, a cavity layer, and an aperture-frequency selective surface (FSS) layer. The antenna is fabricated using laser-cutting brass technology. A low-cost, compact, and high gain Fabry–Perot cavity (FPC) antenna which operates at 300 GHz is presented.
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