Frequency-Tunable and Pattern Diversity Antennas for Cognitive Radio Applications

Tunable Filter-Antennas for Cognitive Radio Applications

In this paper, frequency-tunable microstrip antennas, for cognitive radio applications, are proposed. The approach is based on electrically tuning the antenna’s operating frequency by integrating reconfigurable band pass filters into wideband antenna structures. The design of an open loop resonator (OLR)-based bandstop filter, and its transformation to a bandpass filter, are investigated first....

Dual Port Ultra Wideband Antennas for Cognitive Radio and Diversity Applications

Ultra-wideband (UWB) technology has become one of the most promising technology for shortrange high speed data communication due to its high data transmission rate and large bandwidth. These systems utilize the frequency band from 3.1GHz to 10.6 GHz, which is al‐ located to the UWB systems by the Federal Communications Commission (FCC) [1]. In this ultra-wide spectrum, several unlicensed short ...

Reconfigurable front-end antennas for cognitive radio applications

This study presents new antenna schemes suitable for cognitive radio communications. The antenna structures consist of a ultra wide band (UWB) sensing antenna, and a frequency reconfigurable communicating antenna both incorporated into the same substrate. Two different techniques to achieve the required frequency agility are proposed. The first one is based on a rotational motion of the radiati...

Sensorial Antennas for Radio-features Extraction in Vehicular Cognitive Applications

In the last years wireless communication systems attracted commercial interest because of the possibility of developing innovative mobile networks. Cognitive Radios and Smart Antennas are technologies that could allow substantial improvement both for user and system sides. In particular in this paper the attention is focused on the antenna equipment for a Cognitive Base Transceiver Station (CBT...

Reconfigurable Microstrip Antennas for Cognitive Radio