Title :
Coupling and Correlation Reduction in Compact Arrays for WSN Nodes via Pre-fractal Defected Ground Plane
Author :
Kakoyiannis, Constantine G. ; Constantinou, Philip
Author_Institution :
Mobile Radio Commun. Lab., Nat. Tech. Univ. of Athens, Athens, Greece
Abstract :
We studied compact printed arrays built with sinusoidal monopoles. The antennas were designed at 2-3 GHz according to the size and bandwidth constraints of broadband sensor networks. Their performance was characterized in terms of VSWR bandwidth, broadband radiation efficiency, mutual coupling and broadband envelope correlation. Results show that densely-packed compact arrays feature controllable element detuning, whereas envelope correlation stays below 0.5 even for lambda 0/10 spacing. Finally, if coupling and correlation suppression is needed, we describe a simple yet effective technique that offers multi-decibel gains. It is based on disturbance of the ground currents by insertion of a defect.
Keywords :
UHF antennas; antenna radiation patterns; broadband antennas; microstrip antenna arrays; wireless sensor networks; WSN nodes; broadband envelope correlation; broadband radiation efficiency; broadband sensor networks; compact printed arrays; controllable element detuning; correlation reduction; frequency 2 GHz to 3 GHz; mutual coupling; prefractal defected ground plane; wireless sensor networks; Bandwidth; Broadband antennas; Circuits; Microstrip antenna arrays; Microstrip antennas; Mobile communication; Mutual coupling; Sensor arrays; Streaming media; Wireless sensor networks; compact arrays; defected ground structure; envelope correlation; microstrip antennas; mutual coupling;
Conference_Titel :
Sensor Technologies and Applications, 2009. SENSORCOMM '09. Third International Conference on
Conference_Location :
Athens, Glyfada
Print_ISBN :
978-0-7695-3669-9
DOI :
10.1109/SENSORCOMM.2009.36
