Le Huy Trinh

Le Huy Trinh
Ho Chi Minh City University of Information Technology | UIT · Department of Embedded Systems

Ph.D

About

52
Publications
37,131
Reads
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235
Citations
Citations since 2016
31 Research Items
230 Citations
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060
Additional affiliations
September 2015 - May 2016
Ho Chi Minh City University of Information Technology
Position
  • Lecturer
September 2012 - May 2016
University of Nice Sophia Antipolis
Position
  • PhD Student

Publications

Publications (52)
Article
Full-text available
This article presents a reconfigurable antenna using digitally tuneable capacitors (DTCs). Mounted on a 120 × 200 mm2 ground plane, the radiating element has very compact dimensions of 0.06λg × 0.016λg × 0.0016λg (with λg being the wavelength at 585 MHz). The proposed structure could be operated in the white-space frequency band from 470 to 700 MHz...
Article
Full-text available
This work presents the use of a three-element radiating structure for circularly polarized Low-Power Wide Area Network (LP-WAN) communication with space. The proposed structure has a 72 mm × 72 mm × 12 mm compact size with Right-Handed Circular Polarization (RHCP) and a 120∘ wide beamwidth radiation pattern. Printed on low-cost FR4 Epoxy substrate,...
Conference Paper
Full-text available
In this paper, the use of a three element solution is studied for Low-Power Wide Area Network (LP-WAN) communication from space. A compact size with RHCP and wide beam-width radiation pattern performance is desired. The three element structure is compared with a quadri-fillar solution in term of frequency bandwidth, radiation pattern beamwidth and...
Article
Full-text available
In this paper, a directional pattern-reconfigurable slot antenna at 2.4 GHz is presented. The antenna can provide three evenly-separated directional patterns and one omnidirectional pattern. The proposed solution is fully suitable for the integration in Internet of things (IoT) network base stations to increase the communication range and reduce pa...
Conference Paper
Full-text available
In this paper, a small multi-sectorial antenna for Wireless Sensor Networks (WSN) is presented. With 4 different directive patterns, the proposed structure can cover the 2.4 GHz ISM and LTE 2500 bands with a measured realized gain higher than 4 dBi in the azimuth plane. From indoor environment measurements, a 15.5 dB diversity gain is obtained comp...
Conference Paper
In this paper, a directional reconfigurable antenna suitable for efficient Wireless Sensor Networks (WSN) is presented. In order to realistically assess the performance of the antenna, a prototype of the entire final system including the pattern reconfigurable antenna, a PowWow WSN mote, and the switching circuit has been realized. Results in terms...
Conference Paper
The prototype of a differential pattern reconfigurable antenna suitable for efficient wireless sensor networks is presented. The measurement of the prototype as well as the integration with the reconfiguration control system is discussed. Numerical simulations at the network layer are also reported.
Article
Reconfigurable directional antennas (RDA) bring new opportunities to reduce data collision in wireless sensor networks (WSN). In this letter, a new reconfigurable directional antenna-based receiver-Initiated cycled receiver (RDA-RICER) medium access control (MAC) protocol is proposed for WSN nodes equipped with switched antennas. A low complexity a...
Article
Full-text available
This letter presents a reconfigurable antenna for mobile terminals with extended band coverage obtained by using a digitally tunable capacitor (DTC). The antenna structure is matched permanently over high frequency bands including DCS/PCS, UMTS, LTE 1800/2600, and 3.5-GHz bands. Concerning the sub-GHz bands, several reconfigurable states enable a f...
Article
Full-text available
In recent years, telecommunication technologies have enormous progress, especially cellular communications and wireless sensor networks. To meet the demand of increasing transmission capacity, improving quality of cellular communication channels, expanding the operating band of the equipment is necessary. As passive antenna has reached the limit on...
Conference Paper
In recent years, frequency reconfigurable antennas have been widely studied for mobile phone application. Such structure can be used to cover a wideband in the sub-GHz by tuning the resonance, with a reduced size of the antenna. However, the majorities of this antenna type are narrow band. In this article, a mixed structure is proposed to study the...
Conference Paper
Full-text available
A design approach based on transmission line theory for the synthesis of pattern reconfigurable antennas is presented. It allows the design of a single input port parasitic elements antenna fulfilling user-defined requirements on a target radiation pattern. The effectiveness of the proposed approach is demonstrated in dealing with a low profile dir...
Article
Full-text available
Dans cet article, nous présentons une structure antennaire reconfigurable destinée à être placée sur le toit d'un véhicule afin de communiquer dans la bande Car-to-Car à 5,9 GHz. La solution proposée est constituée de 3 éléments rayonnants qui peuvent jouer alternativement le rôle d'élément actif ou parasite. Grâce à l'utilisation d'éléments de typ...
Article
Full-text available
A 4 × 4 MIMO multiband antenna system for mobile handsets is proposed in this paper. The placement of the elements on the terminal chassis as well as the single structure has been optimized in order to reduce the Envelope Correlation Coefficient (ECC). Simulated and measured results, including also the integration with a a real 7-inch commercial ta...
Article
In this paper, the design of an MIMO antenna system for WIFI gateway application is proposed. 8 printed monopole dual band antennas are placed on a 135×135mm2 FR-4 PCB. Placement of the elements is optimized to limit coupling effect. The objective of the system is to combine the MIMO technique and antenna diversity to increase data rate performance...
Conference Paper
Rectennas have received considerable attention in the recent decades thanks to their unlimited applications. In this paper, rectenna measurements in a realistic environment will be investigated. The space diversity technique has been used to mitigate the multipath situation. Two configurations for evaluating the performance of the diversity techniq...
Conference Paper
Interest in wireless power transmission (WPT) systems has increased remarkably in recent years thanks to their unlimited applications in wireless sensor networks, energy harvesting systems, RFIDs and so on. The key element on the receiving side of a WPT system is the rectenna (rectifier + antenna) which receives electromagnetic power and converts i...
Article
In this paper, a new design of a miniature multiband antenna for small and low-profile wireless handheld devices is proposed. The proposed system operates in several communications standards WIFI (2.4-2.5GHz), LTE2500 (2.52.7GHz), HyperLAN2 (5.35-5.725GHz) and ISM (5.7255.825GHz) bands. Mounted on a small circular ground plane, of a radius of 20mm,...
Article
In this paper, an efficient dual multi-band planar inverted F Antenna system suitable for wireless communication devices is presented. This system is based on a new approach to enhance the bandwidth of the PIFA by using slots on their main plate in a specific configuration. A slots inserted on the substrate printed circuit board of the system allow...
Conference Paper
Full-text available
In this letter, a novel mobile phone antenna for 2G, 3G and 4G standards is presented. Based on the folded inverted-L antenna associated with a ground stub, the proposed structure can operate in all the different bands of mobile telecommunications (GSM/UMTS/LTE). With a volume of 68×17 mm2 and placed on a FR4 Epoxy substrate, total efficiency of th...
Conference Paper
Full-text available
This article presents the design and simulation of a MIMO antenna dedicated to picocell applications. Satisfying the compactness of a mini-residential gateway, the proposed concept is made up of two folded IFAs with PI matching circuits on a FR4 epoxy substrate. The antenna operates in the frequency range of 700 to 960 MHz with a S11 lower than -10...
Article
Full-text available
A new approach for a passive wake-up receiver is presented to improve its sensitivity. This architecture is based on a passive voltage multiplier circuit associated with a Schottky diode rectifier and using an on-off keying modulation for the input radio frequency signal. It is shown that, using this approach, a 10 dB better sensitivity is obtained...
Article
Full-text available
This paper proposes the design of a dual-band integrated rectenna. The rectenna has compact size of 0.4 × 0.3 × 0.25 cm3 and operates at 925 MHz and 2450 MHz bands. In general, the rectenna consists of two main parts, the metal-rimmed dual-band antenna used for harvesting the radio frequency (RF) signals from the environment and the rectifier circu...

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Projects

Project (1)
Project
Using the LoRa technology for object tracking and WSN project.