A Switched Beamforming of Fully Shielded Six Parasitic Planar Array for IoT Network
2020
An optimized switched parasitic smart antenna (SPSA) 915 MHz that consists of 6 monopole parasitic wires encircled a single feeding monopole wire and configured on top of a 328 mm circular ground plane was manufactured and evaluated. SPSA prototype is initially designed to support the practical operation of a particular IoT based surveillance network within the university campus environment. In practical, the constructed antenna installed at a server station will continuously detect the particular active sensor node and maintain the connection and the data transfer between sensor node and the server. A slightly different switched beamforming technique deployed on the fully shielded cover seven monopole wires planar array by electronically setting-up 3 parasitic wires to be grounded and three other floating at the same time in order to point the power beam into a certain direction. Through the sequential variations of those wires set-up then the main lobe directions would be pointed to 6 different directions, i.e. $0 ^{\circ}/ 360 ^{\circ}, 60 ^{\circ}$, $120 ^{\circ}, 180 ^{\circ}, 240 ^{\circ}$, and 300 °.
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