A Low-Profile Dual-Polarized Transmitarray with Enhanced Gain and Beam Steering at Ku Band

Applied Sciences, Journal Year: 2025, Volume and Issue: 15(9), P. 4656 - 4656

Published: April 23, 2025

A low profile dual polarized transmitarray antenna, made of three identical layers, is proposed in this paper for Ku-band applications. The comprises 22 × symmetrical unit cells. 3-bit phase compensation layer with less than αT = 1.3 dB transmission loss and 2π coverage both linear components at the central frequency f0 12 GHz designed. Moreover, an incidence angle θ 30°, cell 2 dB; close to zero 0°. fabricated exhibits a measured peak gain Gm0 21 GHz. corresponding 1 bandwidth BWg 10.8% (11.1–12.4 GHz). side lobe levels are SLL0 −20.8 antenna can be used beam steering up γmax ±30° scan △GMSL1 2.73 f1 12.4

Language: Английский

Reconfigurable Multifunctional Metasurfaces for Full-Space Electromagnetic Wave Front Control

Micromachines, Journal Year: 2024, Volume and Issue: 15(11), P. 1282 - 1282

Published: Oct. 22, 2024

In order to implement multiple electromagnetic (EM) wave front control, a reconfigurable multifunctional metasurface (RMM) has been investigated in this paper. It can meet the requirements for 6G communication systems. Considering full-space working modes simultaneously, both reflection and transmission modes, flexible transmission-reflection-integrated RMM with p-i-n diodes anisotropic structures is proposed. By introducing 45°-inclined H-shaped AS grating-like micro-structure, polarization conversion of linear circular (LP-to-CP) achieved good angular stability, mode from top bottom. Meanwhile, beam patterns be tuned by switching four achieve 1-bit phase, which are embedded bottom unit cells. To demonstrate abilities RMMs regulate EM waves, mode, transmitted reflected designed simulated. Furthermore, encoding two proper sequences 13×13 elements, beams achieved, respectively. The simulation results consistent theoretical method. suggested helpful radar wireless communications because its compact size, simple construction, multi-functionality.

Language: Английский

Modularized Reconfigurable Functional Electromagnetic Surfaces Using Tightly Coupled Antennas and Back-Loaded Radio Frequency Circuits

Micromachines, Journal Year: 2024, Volume and Issue: 15(12), P. 1490 - 1490

Published: Dec. 12, 2024

This paper presents a modularized reconfigurable functional electromagnetic surface (MRFES) for broadband absorption and polarization conversion by using tightly coupled dipole antennas (TCDA) back-loaded radio frequency (RF) circuits (BLRFC). A dual-polarized antenna array with tight coupling wide angular scanning characteristics is designed. By loading different RF on the back side of array’s ground plane, switchable functions are achieved. The design adopts modularization to facilitate replacement diverse (EM) control functions. final has thickness 13.437 mm size 119.5 × mm. It works in bandwidth range 4.14–13 GHz. Upon circuit board, absorbing formed, achieving dual-polarization within 4.14–12.4 With board attached, effects realized 4.4–12.9 Both simulations experiments verify that designed EM possesses modular absorption/polarization conversion. proposed scheme holds promising prospects applications active stealth, adaptive camouflage, intelligent communication other fields.

Language: Английский