A Dual Band Compact PIFA Antenna For Internet Of Things Networks Sigfox, Lorawan And Zigbee

In this paper, a planar inverted-F antenna (PIFA) for Internet Of Things (IOT) networks is studied. The proposed structure covers the 868MHz radio frequency band used by LoRaWAN, Sigfox, Z-Wave and ZigBee in Europe and the 2.4GHz radio frequency band used for Zigbee, Bluetooth and WiFi in all the world. The miniaturization in the antenna size is achieved by introducing a meandered microstrip line and the setup of a short line between the resonant element and the ground plane. The antenna has compact size of 100x40x1.6mm3. The radiation patterns in the operating bandwidth are almost the same as the omnidirectional characteristics. The optimization of the antenna parameters was performed by CADFEKO, a Method of Moment (MoM) based solver

A Compact PIFA Antenna For Internet Of Things Network LORAWAN at 900 Mhz Band

in this paper, a planar inverted-F antenna (PIFA) for LoRaWan network is studied. The proposed structure covers the 868MHz radio frequency band used by LoRaWan in Europe and the 915 MHz radio frequency band used in North America. The miniaturization in the antenna size is achieved by introducing a meandered microstrip line. The setup of the meandered line allows obtaining lower resonant frequency and large -6dB bandwidth and important gain.The antenna has compact size of 40x26x1.6mm3. The radiation patterns in the operating bandwidth are almost the same as the omnidirectional characteristics. The influences of various design parameters are investigated using CADFEKO, a Method of Moment (MoM) based solver

Casquette intelligente connectée à but préventif

International audienceL'objectif de ce travail est la conception et réalisation d'une casquette intelligente connectée à but préventif. En effet, vu que certaines personnes s'exposent au soleil d'une façon excessive, il fallait concevoir un système qui alerte l'utilisateur du système en cas de dépassement d'un délai donné. Le système peut aussi enregistrer les valeurs de la température et l'humidité dans une base de données. Le système est conçu avec un capteur, un microcontrôleur, une carte Bluetooth et une application mobile

Antennes Planaires Hexagonales Pour Applications Ultra Large Bande

Dans cet article, une étude paramétrique des antennes planaires hexagonales alimentées par une onde coplanaire nous fait découvrir des antennes miniaturisées ayant des bandes passantes très larges appartenant à la bande 3.1-10.6GHz, ce qui les rendent des solutions adéquates pour les applications Ultra Large Bande. Les simulations ont été faites avec CADFEKO un solveur qui se base, entre autres, sur la méthode des moments

Etude Paramétrique Des Antennes Patchs Rectangulaires Alimentées Par Proximité

Dans cet article, le comportement d’une antenne patch rectangulaire alimentée par proximité a été étudié en fonction d’un certain nombre de paramètres à savoir : les permittivités relatives des deux substrats et les dimensions de la ligne d’alimentation. Les résultats nous montrent que le changement de ces paramètres influe sur la fréquence de résonance, le gain et l’adaptation d’impédance. Les simulations ont été faites avec le solveur CADFEK

Le Comportement Des Antennes Fractales De Types «Courbe De Sierpinski»

Dans cet article, le comportement d’une antenne planaire sous forme fractal de type “courbe de SIERPINSKI” a été étudié. Les résultats nous montrent qu’il y a une relation entre le nombre d’itération et les fréquences de résonances. En effet, plus le nombre d’itération augmente, plus la fréquence de résonance diminue de même pour les gains et les bandes passantes. Les simulations ont été faites par un solveur qui utilise entre autres la Méthode des Moments qui reste la meilleure méthode d’analyse pour les antennes filaires et planaire

The behavior of CPW-Fed microstrip patch antenna with KOCH SNOWFLAKE Fractal Slots

This paper presents the behavior of CPW-Fed microstrip patch antenna with KOCH SNOWFLAKE Fractal slots on the borders of the radiating element and the ground plane. Increasing the number of iterations allows us obtaining lower resonant frequencies. The proposed antenna is an adequate solution for the 900MHz RFID (Radio Frequency Identification), 1710-1880 MHz LTE (Long Term Evolution), 1920-2170 UMTS (Universal Mobile Telecommunications System) and for 3.3 WIMAX (Worldwide Interoperability for Microwave Access) applications. The simulations were performed with FEKO 6.3

UWB Compact Monopole Antenna for LTE, UMTS and WIMAX applications

In this paper, a monopole Antenna is studied for the 1710-1880MHz LTE (Long Term Evolution) Band, for the 1900-2170MHz UMTS (Universal Mobile Telecommunications System) band, and for the 2.3GHz WIMAX (Worldwide Interoperability for Microwave Access) band. For its large size, this antenna is designed to be installed in outdoor and indoor antennas

Compact broadband antenna with Vicsek fractal slots for WLAN and WiMAX applications

This article belongs to the Special Issue Photonic Technologies and Systems Enabling 6G.This paper aims to design a compact broadband antenna for wireless local area network (WLAN) and worldwide interoperability for microwave access (WIMAX) applications. The suggested antenna consists of an octagonal radiator with Vicsek fractal slots and a partial ground plane, it is printed on FR-4 dielectric substrate, and its global dimension is 50 × 50 × 1.6 mm3. The antenna is designed and constructed using both CST MICROWAVE STUDIO® and CADFEKO electromagnetic solver, and in order to validate the acquired simulation results, the antenna is manufactured and tested using vector network analyzer E5071C. The measurement results show that the designed antenna attains a broadband bandwidth (S11 < −10 dB) from 2.48 to 6.7 GHz resonating at 3.6 and 5.3 GHz, respectively. The broadband bandwidth covers the two required bands: WiMAX at the frequencies 2.3/2.5/3.3/3.5/5/5.5 GHz and WLAN at the frequencies 3.6/2.4–2.5/4.9–5.9 GHz. In addition, the suggested antenna provides good gains of 2.78 dBi and 5.32 dBi, omnidirectional measured radiation patterns in the E-plane and the H-plane and high efficiencies of 88.5% and 84.6% at the resonant frequencies. A close agreement of about 90% between simulation and measurement results is noticed.The authors appreciate the funding from Universidad Carlos III de Madrid and the European Union's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie Grant 801538. In addition the partial support from the Researchers Supporting Project number (RSP-2021/58), King Saud University, Riyadh, Saudi Arabia, is acknowledged

A Tri-band Miscrostrip patch antenna with Cantor Set Fractal slots for LTE and RFID applications

This paper presents a Tri-band Miscrostrip patch antenna with Cantor Set Fractal slots. Increasing the number of iterations allows us obtaining lower resonant frequencies and important gains. The proposed antenna is an adequate solution for the 1710-1880 MHz LTE (Long Term Evolution) and for the 5.8/8.2GHz RFID (Radio Frequency Identification) applications. The simulations were performed with FEKO 6.3