| Summary: | Radio direction finding perform better at high altitude due to
greater line of sight coverage. In this paper, the radio direction
finding-miniature unmanned air vehicles (RDF-MUAVs)
platform able to localize the beacon by accessing the direction
of signal and report it back to the ground station immediately,
improving search and rescue operations. RDF-MUAV system
divided into four major part; RF front end design; RF software
design; ground station design; and user interface (UI). This
paper focuses on two out of the four major parts, which
designing a good UI and RF front end to be integrated into the
system. The UI is designed using Linux, Apache, MySQL,
PHP (LAMP) architecture in Raspberry Pi platform that can
display accurate data obtained from RDF-MUAVs. The UI is
based on HTML which is lightweight, modifiable and can be
accessed through smartphone, tablets, or personal computer.
In the antenna design, phase direction finder method is
chosen. The rotation of antenna can be done by moving the
UAV to obtain the bearing to the source signal. Proposed type
of antenna is Yagi-Uda antenna due to its high gain and
relatively small size. The folded dipole is chosen as the driven
element of the antenna due to its bandwidth characteristics
and directivity. Result shows the function-al bandwidth is
200MHz which can accept electromagnetic waves from
500MHz to 600MHz and 900MHz to 1000MHz. Overall, the
design implementations provide a feasible system in search
and rescue operation.
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