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Listar por palabra clave "2.4 GHz"

Mostrando ítems 1-7 de 7

A self-organized Wireless Sensor Network (WSN) for a home-event managed system: Design of a cost efficient 6LoWPAN-USB gateway with RFID security

Floriano Sánchez, Sergio Antonio (Universitat Politècnica de València, 2015-10-27)

This Thesis investigates the most appropriate choices from a hardware and software design perspective, trying to find a cost-efficient solution for the implementation of a simple and scalable wireless sensor network. The ...
Miniaturized On-Ground 2.4 GHz IoT LTCC Chip Antenna and Its Positioning on a Ground Plane

Molins-Benlliure, Jaime; Cabedo Fabres, Marta; Antonino Daviu, Eva; Ferrando Bataller, Miguel (MDPI AG, 2023-03)

[EN] This paper presents a very low-profile on-ground chip antenna with a total volume of 0.075¿0× 0.056¿0× 0.019¿0 (at f0 = 2.4 GHz). The proposed design is a corrugated (accordion-like) planar inverted F antenna (PIFA) ...
Study of the Optimum Frequency at 2.4GHz ISM Band for Underwater Wireless Ad Hoc Communications

Sendra Compte, Sandra; Lamparero Arroyo, José Vicente; Lloret, Jaime; Ardid Ramírez, Miguel (Springer Verlag (Germany), 2012)

Underwater communications at low frequencies are characterized by the low data rate. But in some cases wireless sensors must be placed quite close to each other and need high data rates in order to accurately sense an ...
Underwater Ad Hoc Wireless Communication for Video Delivery

Sendra, Sandra; Lloret, Jaime; Jimenez, Jose M.; Ghafoor, Kayhan Zrar (Springer-Verlag, 2017)

[EN] Due to the high attenuation of the water at high frequencies, underwater communications in freshwater are not being investigated so much. Many current underwater communication systems are based on acoustic or optical ...
Underwater communications for video surveillance systems at 2.4 GHz

Sendra, Sandra; Lloret, Jaime; Jimenez, Jose M.; Rodrigues, Joel José Puga Coelho (MDPI, 2016-10)

Video surveillance is needed to control many activities performed in underwater environments. The use of wired media can be a problem since the material specially designed for underwater environments is very expensive. In ...
Underwater Wireless Communications in Freshwater at 2.4 GHz

Sendra Compte, Sandra; Lloret, Jaime; Rodrigues, Joel J. P. C.; Aguiar, Javier M. (Institute of Electrical and Electronics Engineers (IEEE), 2013-09)

There are few equations for underwater communications in the related literature. They show that the speed propagation and absorption coefficient in freshwater are independent of the working frequency of the transmitted ...
Underwater Wireless Sensor Communications in the 2.4 GHz ISM Frequency Band

Lloret, Jaime; Sendra Compte, Sandra; Ardid Ramírez, Miguel; Puga Coelho Rodrigues, Joel José (MDPI, 2012-04)

One of the main problems in underwater communications is the low data rate available due to the use of low frequencies. Moreover, there are many problems inherent to the medium such as reflections, refraction, energy ...