Article
Engineering, Electrical & Electronic
Peipei Wang, Wu Ren, Qingyun Zeng, Zhenghui Xue, Weiming Li
Summary: This letter presents a dual-band beam-scanning antenna achieved by rotating two transmitarrays operating at 20 and 30 GHz. The designed transmitarrays have independent performance at two frequency bands, with different unit cell sizes for dual-band operation. By rotating the transmitarrays synchronously, the antenna enables two-dimensional beam scanning with a maximum scanning angle of +/- 40 degrees. The measured results from the prototype are in good agreement with the simulated results.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2022)
Article
Computer Science, Information Systems
Reda Madi, Antonio Clemente, Ronan Sauleau
Summary: This paper presents a novel design and experimental characterization of a dual-band, shared aperture transmitarray operating in dual linear polarization at K/Ka-band. It is based on a 1-bit unit-cell realized using five metal layers and demonstrates low transmission loss (< 2 dB). The proposed transmitarray is able to shape the beam independently in both K- and Ka-bands by combining the polarization rotation method and the stacked patch architecture. Experimental results show excellent agreement with numerical and full-wave electromagnetic simulations. The antenna system is a low-cost and compact solution for future vehicular broadband SatCom applications.
Article
Engineering, Electrical & Electronic
Miguel Ferrando-Rocher, Jose Ignacio Herranz-Herruzo, Alejandro Valero-Nogueira, Bernardo Bernardo-Clemente
Summary: This letter presents two slotted array antennas working in the Ka-band with switchable circular polarization capability. Experimental results show a reflection coefficient below -10 dB within the targeted frequency band, with good polarization purity achieved in both prototypes. The proposed mechanism offers a simple solution for switching circular polarization sense in low-cost, low-profile, and high-efficient antennas suitable for millimeter-wave band arrays.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2021)
Article
Computer Science, Information Systems
Hoang Le-Huu, Chulhun Seo
Summary: This paper proposes a dual-band free-positioning transmitting coil (FPDB-Tx) for multiple-receiver WPT, which adapts to Rx misalignment by examining current direction and is designed with no null efficiency point.
Article
Computer Science, Interdisciplinary Applications
Qiaoshan Zhang, Xiaowei Shi, Steven Gao, Yan Li, Qi Luo, Jixiang Wan, Zhaoxuan Xue, Lehu Wen
Summary: The research presents a highly integrated K/Ka-band phased array with high efficiency and channel isolation, achieving high isolations between different frequency and polarization channels. Experimental results demonstrate good beam scanning performance of the phased array.
INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING
(2021)
Article
Engineering, Electrical & Electronic
Jianfeng Zhu, Yang Yang, Shaowei Liao, Quan Xue
Summary: This paper proposes a dual-band antenna design by hybridizing a folded reflectarray antenna (FRA) and a folded transmitarray antenna (FTA). By incorporating polarization rotation and polarization twisting techniques in different frequency bands, the antenna achieves high-gain radiation in both frequency bands.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Pei Yang, Ruirong Dang, Lipin Li
Summary: A polarization-twisting metasurface antenna (PTMA) is proposed to generate dual-band dual-circularly polarized (CP) radiation in the Ku-band. By integrating a dual-linear-to-circular polarization converter (DLCPC) with a linear polarization conversion metasurface (LPCM), the PTMA is capable of realizing both left hand CP (LHCP) and right hand CP (RHCP) radiation.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Chemistry, Analytical
Yi Fan, Xiongying Liu, Chao Xu
Summary: This study presents an implantable antenna for RF energy harvesting and data transmission. The antenna operates at dual ISM bands and has compact dimensions. The antenna generates multiple resonant frequencies for wideband operation and can be used for both energy harvesting and data transmission.
Article
Engineering, Electrical & Electronic
Fan Wu, Jingxue Wang, Lei Xiang, Wei Hong, Kwai-Man Luk
Summary: This communication introduces a novel dual-polarized transmitarray antenna that offers wide bandwidth and independent beam control. A new low-insertion-loss transmitarray element is proposed, which utilizes magnetoelectric dipole and orthogonal feeding probes to achieve wideband dual-polarized operation. Three different transmitarrays are designed and tested at millimeter-wave frequencies, demonstrating their ability to produce different collimated beams and manipulate cross-polarization. Measurement results match well with simulations, confirming the wideband operation and independent beam controls.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Computer Science, Information Systems
MingBo Cai, Zehong Yan, Fangfang Fan, Shuyang Yang, Xi Li
Summary: The proposed double-layer Ku/K dual-band TA shows good performance in both Ku and K bands, making it suitable for millimeter wave wireless communication systems.
Article
Engineering, Electrical & Electronic
Abdul Aziz, Xingliang Zhang, Fan Yang, Shenheng Xu, Maokun Li
Summary: A dual-band orthogonally polarized contour beam transmitarray has been designed for European coverage region, achieving contour beam patterns in both 12.5 and 14.25 GHz frequency bands. The optimized quad-layer transmitarray unit cell configuration and phase distribution control successfully enable efficient dual-band operation. The measured minimum gains at 12.5 and 14.25 GHz in the coverage region are 25 and 25.3 dBi, showing good agreement with calculated patterns.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Xuanfeng Tong, Zhi Hao Jiang, Yuan Li, Fan Wu, Jianjun Wu, Ronan Sauleau, Wei Hong
Summary: This paper proposes an integrated dual-band dual-circularly polarized transmit-array antenna for K- and Ka-bands. Antenna-filter-antenna based polarization twisting TA cells are designed to achieve efficient circular-polarization transmission without using phase shifting lines. The dual-band dual-CP transmissive beamforming characteristics are realized by arranging K- and Ka-band cells in the same aperture and employing a hybrid phase compensation strategy. The measured results show that the antenna has independently controllable dual CP beams in K-band and Ka-band.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Joaquin F. Valencia Sullca, Santiago Cogollos, Vicente E. Boria, Marco Guglielmi
Summary: The article describes a new family of microwave bandpass filters in the rectangular waveguide based on resonant apertures, which can be used for both single- and dual-band transfer functions. The use of capacitive stubs and a staircase configuration is also discussed to improve the out-of-band response and selectivity of the filter. The simulations are compared with measured results, showing good agreement and validating the new filter topologies and design procedure.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2022)
Article
Engineering, Electrical & Electronic
Xinyue Dai, Qian Yang, Hao Du, Cheng Guo, Anxue Zhang
Summary: This brief proposes a direct synthesis method for dual-band filters based on frequency transformations, achieving a wide range of bandwidth and center frequency ratios. A novel circuit conversion scheme eases the difficulty of implementing complex circuits and significantly reduces the sensitivity of S parameters to circuit element values. Design and fabrication of narrowband and wideband dual-band BPFs demonstrate the validity of the proposed method with good agreement between simulated and measured results.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2021)
Article
Engineering, Electrical & Electronic
Gokhan Gultepe, Gabriel M. Rebeiz
Summary: This article presents a 16 x 16 dual-polarized Ku-band phased-array receiver with simultaneous dual-beam reception capability, incorporating 64 beamformer chips and 256 antennas. The array has a directivity of 28 dB at mid-band, making it suitable for multi-satellite reception systems, such as simultaneous television reception.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2021)
Article
Engineering, Electrical & Electronic
Orestis Koutsos, Francesco Foglia Manzillo, Antonio Clemente, Ronan Sauleau
Summary: A novel approach for studying and designing low-cost anisotropic transmitarrays (TAs) at sub-THz frequencies is presented. The array consists of three metal layers and two interleaved dielectric spacers, and a four-port equivalent circuit model is derived to accurately model the anisotropic behavior of the unit cell (UC). The results demonstrate the effectiveness of the design methodology even under strict technological constraints.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Xuanfeng Tong, Zhi Hao Jiang, Yuan Li, Fan Wu, Ronan Sauleau, Wei Hong
Summary: This paper presents the design and experiments of a dual-wideband dual-circularly polarized shared-aperture reflectarray, operating at the K-/Ka-band using a single functional substrate. Wideband performance is achieved by coupling the adjacent resonances of the aperture and patch and utilizing shorted microstrip phase delay lines. The reflectarray cells can independently control the reflective phase delay of orthogonal CP beams at both frequency bands, providing four degrees of freedom for beamforming. The wideband performance of the proposed cells is verified through the investigation of an infinite periodic gradient array.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Charalampos Stoumpos, Jean-Philippe Fraysse, George Goussetis, Cebrian Garcia Gonzalez, Ronan Sauleau, Herve Legay
Summary: This article describes the concept and development of a highly efficient pyramidal horn. The antenna utilizes a rectangular radiating aperture and two smaller flared waveguide sections, with a bifurcation responsible for recombining the incoming fields. By properly exciting and aligning the aperture modes, broadband and high-efficiency performance can be achieved.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Michele Del Mastro, Adham Mahmoud, Thomas Potelon, Ronan Sauleau, Gilles Quagliaro, Anthony Grbic, Mauro Ettorre
Summary: Modern K-/Ka-band satellite communications have high demands for terminal antenna performance. This article proposes an ultra-low-profile continuous transverse stub array antenna to meet these challenges. The antenna is wideband, high gain, and provides multibeam radiation with various polarization options.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Xuanfeng Tong, Zhi Hao Jiang, Hao Chen, Fan Wu, Jingyang Cao, Ronan Sauleau, Wei Hong
Summary: In this paper, a dual-circularly polarized multibeam transmit-array antenna is proposed using anisotropic impedance surfaces and hybrid phase compensation strategy. The antenna array consists of eight planarized transmit-array cells with constant dynamic phase difference and Berry phase determined rotation angles. The measured results show that the antenna generates eight RHCP beams and eight LHCP beams with high peak gain values and low axial ratio.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Erdem Cil, Icaro V. Soares, David Renaudeau, Ronan Lucas, Sema Dumanli, Ronan Sauleau, Denys Nikolayev
Summary: This study investigates the possibility of using impedance detuning to detect the location of a capsule in the gastrointestinal tract. Antennas operating in the 433 MHz band are designed and validated through simulations and measurements. In the experimental model, a minimum phase change of around 10° was found, providing sufficient information to track the capsule's position in the GI tract.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Computer Science, Information Systems
Nicola Bartolomei, Darwin Blanco, Francois Doucet, Etienne Girard, Herve Legay, Nelson J. G. Fonseca, Ronan Sauleau, Mauro Ettorre
Summary: This work presents a full metal circularly-polarized lens-like antenna for Satcom applications at Ka-band. The antenna provides multi-beam coverage over a large field of view in the azimuthal plane, while maintaining a relatively simple mechanical design. The antenna system provides 14 beams with alternating right/left handed circular polarization (RHCP/LHCP) with an axial ratio (AR) below 3 Db over an angular range of +/- 19 degrees in the uplink of Ka-Band.
Article
Engineering, Electrical & Electronic
Adham Mahmoud, Jorge Ruiz-Garcia, Olivier de Sagazan, Mauro Ettorre, Ronan Sauleau, David Gonzalez-Ovejero
Summary: This article presents the use of a Luneburg lens to excite a leaky-wave antenna in the sub-THz frequency range. The antenna is fabricated on a 140-mu m thick cyclic Olefin copolymer substrate, with radiating slots etched on the polymer using photolithography. Experimental results show good input reflection coefficient and beam steering capability. The proposed solution offers a low-cost and low-profile alternative for beam-scanning antennas in the sub-THz range.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Xuanfeng Tong, Zhi Hao Jiang, Yuan Li, Fan Wu, Jianjun Wu, Ronan Sauleau, Wei Hong
Summary: This paper proposes an integrated dual-band dual-circularly polarized transmit-array antenna for K- and Ka-bands. Antenna-filter-antenna based polarization twisting TA cells are designed to achieve efficient circular-polarization transmission without using phase shifting lines. The dual-band dual-CP transmissive beamforming characteristics are realized by arranging K- and Ka-band cells in the same aperture and employing a hybrid phase compensation strategy. The measured results show that the antenna has independently controllable dual CP beams in K-band and Ka-band.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Dayan Perez-Quintana, Christos Bilitos, Jorge Ruiz-Garcia, Inigo Ederra, Jorge Teniente-Vallinas, David Gonzalez-Ovejero, Miguel Beruete
Summary: This article presents the design of a flat Luneburg metalens antenna at V-band using gap waveguide (GW) technology. The metalens consists of a parallel plate waveguide (PPW) loaded with metallic pins whose height is modulated to get an effective refractive index that follows the Luneburg equation. A Groove GW (GGW) H-plane horn is used to illuminate the metalens, such that the rays are collimated and a planar wavefront is generated in the direction of propagation. These features make this design an interesting solution for millimeter-wave (MMW) applications.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Computer Science, Information Systems
Reda Madi, Antonio Clemente, Ronan Sauleau
Summary: This paper presents a novel design and experimental characterization of a dual-band, shared aperture transmitarray operating in dual linear polarization at K/Ka-band. It is based on a 1-bit unit-cell realized using five metal layers and demonstrates low transmission loss (< 2 dB). The proposed transmitarray is able to shape the beam independently in both K- and Ka-bands by combining the polarization rotation method and the stacked patch architecture. Experimental results show excellent agreement with numerical and full-wave electromagnetic simulations. The antenna system is a low-cost and compact solution for future vehicular broadband SatCom applications.
Proceedings Paper
Computer Science, Artificial Intelligence
Hieu M. Tran, Kien T. Pham, Thanh M. Vo, Long Tonthat, Tri T. M. Huynh, Son V. T. Dao
Summary: This paper proposes a technique that uses two cameras to accurately estimate the dimensions, volume, and mass of starfruit. Image processing and the conical frustum method are employed to calculate the volume based on the area ratio of the star shape area and its bounding box, and the mass is estimated using the density of the starfruit. The method has been validated with high accuracy and is suitable for use in starfruit and other fruit manufacturing lines.
2023 IEEE STATISTICAL SIGNAL PROCESSING WORKSHOP, SSP
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Adham Mahmoud, Jorge Ruiz-Garcia, Olivier de Sagazan, Mauro Ettorre, Ronan Sauleau, David Gonzalez-Ovejero
Summary: In this study, a Luneburg lens quasi-optical beam-former was used to excite a leaky-wave antenna at 275 GHz. Both the lens and the antenna were fabricated on a Cyclic Olefin Copolymer (COC) substrate. Results showed a reflection coefficient lower than -24 dB and a gain higher than 21 dBi over a 40% fractional bandwidth, spanning from 220 GHz to 330 GHz. The antenna efficiency was estimated to be 28% at the center frequency (275 GHz).
PROCEEDINGS OF THE 2022 21ST MEDITERRANEAN MICROWAVE SYMPOSIUM (MMS 2022)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Jorge Ruiz-Garcia, Christos Bilitos, Enrica Martini, Giovanni Toso, Stefano Maci, David Gonzalez-Ovejero
Summary: This paper presents a Fabry-Perot (FP) antenna with azimuthal scanning at Ka-band. The system utilizes two stacked layers with circular shape, including a Reflecting Luneburg Lens (RLL) in the bottom layer and a Fabry-Perot cavity in the top layer. By switching the beam, the system can generate identical pencil beams for any azimuthal direction. The proposed system is suitable for spatial applications, particularly for medium and high-gain antennas integrated in SmallSats and CubeSats.
2022 16TH EUROPEAN CONFERENCE ON ANTENNAS AND PROPAGATION (EUCAP)
(2022)
