TRINH , Le Huy

In this paper, the use of a tunable capacitor is proposed to reconFigure the resonance frequency of a miniature antenna. The antenna design at 868MHz is described and validated by a 3D electromagnetic simulation. As expected, the operating frequency can be controlled by changing the shunt capacitor value.

This paper discusses the sub-GHz antenna design using for the communication between the terrestrial Internet of Things (IoT) to Low-Earth Orbit (LEO) satellites. In the first part, we will focus on the LEO constraints and the antenna characteristics that are suitable for this application. Then, first results using a compact tri-fillar...

In this work, the performances of different antenna polarization, including linear and circular, in a Low Power Wide Area Network (LPWAN) scenario is studied experimentally . The Industrial Scientific and Medical (ISM) 868MHz unlicensed band is targeted with LoRa modulation. The terminals used for test are compact and representative of industry...

This work presents the use of a three-element radiating structure for circularly polarizedLow-Power Wide Area Network (LP-WAN) communication with space. The proposed structure hasa 72 mm×72 mm×12 mm compact size with Right-Handed Circular Polarization (RHCP) and a120◦wide beamwidth radiation pattern. Printed on low-cost FR4 Epoxy substrate, a...

Most of the Wireless sensor netwot. Most of the Wireless sensor networks (WSN) are using passive Omni-Directionnal antennas (ODA). Reconfigurable Directional Antennas (RDA) have the potential to reduce data collision and increase the communication range when compared to ODA solution. In this paper, a comparison of two different RDA...

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...

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 basestations to increase the communication range and reduce...