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Publications
Publications (321)
In this study, photonics-based near-field measurement and far-field characterization in a 300-GHz band are demonstrated using an electrooptic (EO) sensor with planar scanning. The field to be measured is up-converted to the optical domain (1550 nm) at the EO sensor and delivered to the measurement system with optical fiber. The typical phase drift...
This work presents a
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ball grid array (BGA) module made of low-cost organic substrates which integrates transmitter (Tx) and receiver (Rx) antennas for short-range 60 GHz WiGig communications. The...
This paper presents a portable system for freehand antenna diagnosis and characterization based on amplitude-only data. The amplitude-only samples are acquired by moving a handheld probe, which is tracked by a motion capture system, in front of the antenna under test (AUT) aperture. The acquired measurements are processed using the phaseless source...
substrate-integrated discrete-lens antenna manufactured in standard printed-circuit-board (PCB) techno-logy is demonstrated in H-band (225–325 GHz). The arrays composed of phase-shifting unit-cells and a waveguide-fed planar focal source are designed on a single PCB stack with five metal layers and multiple low-loss dielectric substrates in a monol...
With the rise of consumer applications at millimeter‐wave (mmWave) frequencies during the past ten years, we have witnessed strong research activity dealing with the integration of mmWave antennas in the package of electronic sub‐systems. This chapter provides an overview of the work performed by STMicroelectronics and the University of Nice (Polyt...
In this Letter, the authors report the achievement of terahertz transmissions using advanced quadrature amplitude modulation (QAM)16 signals using 300 GHz silicon photonics devices, developed in industrial foundry process PIC25G. Up to 56 Gbps is obtained using QAM16 single channel modulation and up to 50 Gbps in a dual‐channel configuration.
The 200 and 320 GHz frequency band constitutes an interesting window with approximately constant attenuation, which could potentially have applications in the area of ultra-high-capacity wireless links. The user's demand of data for future 5G mobile systems will require backhaul systems to be able to provide several dozens of GHz in order to satisf...
Cost-effective and easy-to-manufacture antennas are key factors for 5G wireless high data rate links. In this context, we present a patch antenna designed on FR4-PCB for WiGig and backhaul applications, operating in the 60 GHz unlicensed spectrum. Yielding 20% measured 10 dB impedance-bandwidth and a maximum measured gain of 6 dBi, it stands out as...
This article presents a new approach for antenna design education, associating theoretical and practical aspects with an industrial perspective. The approach is implemented as a oneweek course offered by the European School of Antennas (ESoA) every second year and given by a number of skilled instructors from different disciplines under the framewo...
A dual-antenna concept to be integrated in a smart eyewear device is presented. The two antennas are printed on FR4 substrate and placed inside an ABS dielectric eyewear frame manufactured using 3-D printing technology. One of the two antennas is a monopole situated at the back of the eyewear with a specifically shaped ground plane underneath. The...
In this letter, we report the design, fabrication, and measurement of a silicon photonics-based transmitter (Tx) offering both mass production capability and high integration level potentiality. The Tx circuit consists of an integrated photodiode generating a 200-300-GHz signal for photonic upconversion from baseband to millimeter-wave. This Tx ach...
A 60-GHz switched beam chip-to-chip antenna array is introduced. The array consists of four center fed circular patch elements with side vias in a 2 × 2 grid arrangement forming a planar array. The array is designed to fit on a typical multicore chip for reconfigurable interchip wireless communication. The array main beam is switched by changing th...
This paper presents the design of a switched-beam four-element antenna array operating at 60 GHz for wireless data transfers between chips in a multichip computing system. The antenna-in-package uses a patterned artificial magnetic conductor to enhance antenna performance. The four-element array has a switchable pattern and shows improved transmiss...
In this paper, we propose a ball grid array (BGA) module with an integrated 3D-printed plastic lens antenna for application in a dedicated 130 GHz OOK transceiver that targets the area of 5G backhaul/fronthaul systems. The main design goal was the full integration of a small footprint antenna with an energy-efficient transceiver. The antenna system...
Fifth-generation wireless technology, denoted as “5G” by the global wireless communications industry, seeks to accomplish multi-fold increases in key aspects of wireless communication. In conjunction with conventional microwave frequencies, millimeter-wave (mmWave) and THz frequencies and technologies are being investigated by major research instit...
A ball grid array (BGA) module integrated within a three-dimensional printed peanut-shaped lens is proposed for
high-data-rate wireless communications in the F-band (116–140 GHz) between a video camera and a TV or a laptop. The
module implements a 1 × 2 array antenna which radiates a wide beam in the horizontal plane (H-plane) and a narrower beam i...
A 94-GHz phased-array transceiver IC for frequency modulated continuous wave (FMCW) radar with four transmitters, four receivers, and integrated LO generation has been designed and fabricated in a 130-nm SiGe BiCMOS technology, and integrated into an antenna-in-package module. The transceiver, targeting gesture recognition applications for mobile d...
A key limitation of high gain planar microstrip
antenna arrays relies in the high loss of the feeding network. In
this paper, we propose an innovative way to solve this issue by
feeding a microstrip patch antenna by an aperture coupled
dielectric filled waveguide. Using a low loss dielectric, we
managed to achieve a low loss and compact waveguide....
New wireless technologies are constantly
investigated to address the demand for higher data rates
expected by the customers. One particularly interesting field to
explore is about backhaul link solutions in V/E bands for
denser 5G networks. In those millimeter wave systems, high
performance and cost-effective antennas are strongly needed.
Indeed, c...
Leveraging the performances offered by advanced CMOS processes, silicon technologies enable today the development of cost effective millimeter-wave (mmW) applications (60 GHz wireless link is a good example). In order to achieve higher data rates (> 10 Gb/s), we can now think about moving to sub-THz frequencies in order to take advantage of wider f...
This paper presents low-cost and easy-to-manufacture dual-band antenna solution to achieve cellular 4G (LTE-Advanced) coverage in smart eyewear devices. Coupling element type antenna has been evaluated with appropriate matching networks to cover the target bands of 700-960MHz and 1.7-2.7GHz. To emulate a realistic device, an ABS plastic dielectric...
This article presents a 60 GHz circular patch Antenna-on-Chip (AoC) on asymmetric Artificial Magnetic Conductor (AMC) designed and fabricated using the TSMC 0.18 µm CMOS process. An AMC plane allows a positive reflection coefficient within the bandwidth of interest so incident and reflected waves are in phase. At the AMC frequency of operation, a h...
Leveraging the performances offered by advanced CMOS processes, silicon technologies enable today the development of cost effective millimeter-wave (mmW) applications (60 GHz wireless link is a good example). In order to achieve higher data rates (> 10 Gb/s), we can now think about moving to sub-THz frequencies in order to take advantage of wider f...
New wireless technologies are constantly investigated to address the demand for higher data rates expected by the customers. One particularly interesting field to explore is about backhaul link solutions in V/E bands for denser 5G networks. In those millimeter wave systems, high performance and cost-effective antennas are strongly needed. Indeed, c...
An ultra-broadband antenna design for 4G cellular coverage in eyewear devices is presented in this paper. The antenna has been designed considering a realistic eyewear PCB and its dielectric frame. In order to overcome any negative effects from the antenna's surroundings (frequency detuning due to the head and the hand of the user), the antenna was...
This chapter gives a general overview of the antennas used in mobile phones for wireless cellular communications. The evolution of the antenna structures is discussed in combination with the evolution of cellular communication standards. Some common antenna types widely used in mobile terminals are presented, some of them being examples from commer...
This chapter deals with mm-wave and sub-mm-wave probe-fed antenna measurements. First, worldwide state-of-the-art measurement solutions are presented. Then, the most interesting solutions to achieve the RF and mechanical parts of an mm-wave probe-fed measurement setup are described. In a second subpart, the focus lies on possible measurements and a...
Two antenna designs operating in the LTE/4G cellular frequency bands are proposed in this paper. Both designs consist of a driven strip which capacitively excites a parasitic grounded strip for a better matching response around 700 MHz. The antennas are realized using Laser Direct Structuring (LDS) technology on POCAN plastic material with a height...
An embroidered wearable spiral antenna is presented in this study. The spiral antenna is compact and flexible, yet has broad-band performance. The novelty of this study includes considering the antenna-body interaction rather than just considering the antenna alone. The antenna has been simulated and measured on a specific anthropomorphic mannequin...
This paper presents the simulation and measured results of two-element antenna array on layered ground plane that emulates an Artificial Magnetic Conductor (AMC). The antenna operates at 60 GHz for wireless interchip data transfers in multi-core computers. Use of multiple switchable antennas for directional beams between cores in the azimuthal plan...
A ball grid array-module (BGA-module) incorporating a low-cost shaped dielectric lens is proposed for wireless communications in the 60-GHz WiGig band between a smart eyewear, where it is integrated and facing a laptop or TV. The module, which is codesigned with a 60-GHz transceiver, consists of two separate identical antennas for transmitting (Tx)...
The rapid growth of wireless data drives the development of new wireless technologies. We can have here in mind the current works on 5G standardization, wireless backhaul development in V/E Band, as well as low orbit mobile satellite service development in Ku band. For all those systems, the availability of high performance and cost effective anten...
This letter reports a microstrip mesh array antenna in a low temperature co-fired ceramic (LTCC) technology for 94-GHz applications. The microstrip mesh array antenna enlarges the system polarization diversity with the capability of being utilized to support the simultaneous reception in two orthogonal polarizations, as well as transmission in eith...
The design of a micromachined Polyethylene lens for WiGig modules is described and its electromagnetic characteristics are measured. The lens is electromagnetically fed by linearly polarized Tx and Rx patch antennas integrated in an existing ball-grid-array (BGA) organic module. Antennas are separated from each other by a distance of 4.45 mm (0.89λ...
In this paper, we first present a feasibility study to design 4G antennas (700–960 MHz and 1.7–2.7 GHz) for eyewear devices. Those eyewear devices should be connected to the last generation cellular networks, Wireless Local Area Networks or wireless hotspots. Three coupling element type antennas with their matching networks are evaluated in terms o...
This paper presents a compact and flexible embroidered spiral antenna that can be used for wearable applications. The antenna is embroidered by using a state of the art digital embroidery machine with multi-strand conducting thread Liberator™. The antenna has been measured on a Specific Anthropomorphic Mannequin (SAM) phantom and a real human. The...
A micro-electro-mechanical systems fabrication process has been developed to create self-assembled on-chip high efficiency antennas. The self-assembly creates out-of-plane antenna structures, which can have good radiation efficiency on low resistivity substrates. The structural material is SU-8 and the self-assembly curvatures are defined lithograp...
Finaliste ESoA-EuCAP 2015 - Lisbon Student Awards
In this letter, the design and measurement results of a millimeter-wave beam switching antenna are presented. Several antenna prototypes have been fabricated and measured in planar and conformal installations. The developed prototype consists of three antenna arrays of 16 patch elements in each array and it is operating at 61 GHz with linear polari...
This paper presents an aerosol-printed horn-shaped antenna on LTCC designed to operate in the 60 GHz frequency range. This design shows the potential of combining screen- and aerosol- printing to manufacture LTCC integrated antennas at mm-wave frequencies. The antenna not only shows good matching and radiation properties, but is also ideally suited...
This paper provides an overview of the authors' research work to develop low-cost antennas and packaging technologies for 60GHz and 120GHz high speed data rate communications. First, a WiGig module designed in a low cost High-Density-Interconnect organic packaging technology is briefly depicted. The linearly polarized antennas integrated in a 12×12...
In this paper, we study the influence of the radius of a cylindrical
supporting structure on radiation properties of a conformal millimeter-wave
antenna array. Bent antenna array structures on cylindrical surfaces may have
important applications in future mobile devices. Small radii may be needed if
the antenna is printed on the edges of mobile dev...
A designed microstrip grid array antenna at 94 GHz in a low-temperature co-fired ceramic (LTCC) technology was fabricated and measured. The designed and measured results are in good agreement. They show a 10-dB impedance bandwidth of 5.12 GHz from 90 GHz to 95.12 GHz (or 5.45% at 94 GHz), a maximal peak realized of 17.1 dBi with a 3-dB gain bandwid...
This chapter deals with mm-wave and sub-mm-wave probe-fed antenna measurements. First, worldwide state-of-the-art measurement solutions are presented. Then, the most interesting solutions to achieve the RF and mechanical parts of an mm-wave probe-fed measurement setup are described. In a second subpart, the focus lies on possible measurements and a...
This chapter gives a general overview of the antennas used in mobile phones for wireless cellular communications. The evolution of the antenna structures is discussed in combination with the evolution of cellular communication standards. Some common antenna types widely used in mobile terminals are presented, some of them being examples from commer...
This chapter deals with mm-wave and sub-mm-wave probe-fed antenna measurements. First, worldwide state-of-the-art measurement solutions are presented. Then, the most interesting solutions to achieve the RF and mechanical parts of an mm-wave probe-fed measurement setup are described. In a second subpart, the focus lies on possible measurements and a...
In this paper, we investigate the effect of metallic eyewear frames on the reflection coefficient, the radiation pattern and the specific absorption rate (SAR) of 4G antennas integrated in eyewear. The antennas used in the study are Coupling Element type, with appropriate matching networks to cover simultaneously the 700-960MHz and 1.7-2.7GHz frequ...
Characteristic modes analysis of a 4G cellular antenna which operates in LTE, GSM, DCS, PCS and 2.4GHz WLAN standards for an eyewear wireless devices is presented. In previous work, the antenna was designed as capacitive coupling element feeding type, using a printed circuit board (PCB) of FR4 substrate. The antenna operates at 700-960 MHz and 1.7-...
In this paper, two antenna designs using active components are presented for reflection coefficient tunability. The antennas are designed within the scope of the Artemos project and use MEMS switches and BST tunable capacitors internally available in the project. The first antenna uses an SPDT MEMS switch to select between one of the two target fre...
This paper presents first how to use the wires of a woman's bra to achieve off-body transmission at 2.4 GHz. The arrangement of the curved wires of a bra is used as a dipole radiating in free space when the length of the wires is progressively increased. The obtained radiation patterns are compared with the radiated fields of straight dipoles havin...
In this paper, we investigate the performance of a 3D-printed plastic lens operating in the 120 GHz frequency band. An Integrated Passive Device module with built-in linearly polarized patch antenna is used as the source of the lens. The profile of the lens is based on elliptical shape. It is first optimized with Geometrical Optics (GO) and Physica...
In this paper, we present several antenna-array topologies for quadrature spatial combining: In-phase and Quadrature signals are not anymore combined at the circuit level but rather spatially in free space. To demonstrate the feasibility of this concept, an organic module with two 4×1 antenna-arrays is fabricated and measured in V-band. Reflection...
In this paper, we compare the performance of micromachined Teflon and 3D printed Plastic lenses for WiGig modules. Both are based on extended hemispherical shapes. Reusing a HDI module with built-in antenna as a source, we demonstrate an antenna gain improvement of respectively 9 dB and 11 dB for the Plastic and the Teflon lenses. Full-wave simulat...
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In this paper, the influence of the ground plane dimensions on the port-to-port isolation of two closely spaced Universal Mobile Telecommunications System (UMTS) Planar Inverted-F Antennas (PIFAs) with and without neutralization line is first presented. Parametric studies show the existence of an optimal size of the ground plane allowing optimizing...
During the past years, various research teams developed 60 GHz chipset solutions, using both advanced CMOS [1] and BiCMOS [2] technologies. But for the 60 GHz market to flourish not only low cost RFICs are required, low cost antennas and packages are also key elements. Recently, low cost High Density Interconnect (HDI) organic technology has been e...
In this paper, we present a new wideband miniature branchline coupler as a key circuit to be integrated in 60-GHz packaged beamforming networks for phased-array antennas. First, the integrated passive device (IPD) technology from STMicroelectronics is investigated in the mm-wave range through the simulation, fabrication, and measurements of a micro...
In this communication, we present a novel compact dual-band antenna-system for LTE multi-input and multi-output (MIMO) mobile handsets. The radiators consist of 3D Inverted-F- Antennas (IFAs) folded on the non-metalized part of the Printed Circuit Board (PCB) and operating in the LTE 700 MHz band. A parasitic radiating element is also attached to t...
The integration of a Vivaldi antenna on a printed circuit board (PCB) targeting 60-GHz WiGig applications is presented in this letter. The integrated passive device (IPD)technology from STMicroelectronics based on a glass substrate is used for the antenna manufacturing. In free space, the radiation pattern measurements show a realized gain higher t...