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National Repository of Grey Literature 1 records found  Search took 0.00 seconds. 
Design of logarithmic-periodic antenna
 Podaný, Matěj ; Kokolia, Martin (referee) ; Láčík, Jaroslav (advisor)
This thesis deals with the design of log-periodic antenna for frequency band 500 MHz to 4000 MHz. The design procedure sticks to two key parameters imposed on the antenna, which are the directivity that must be higher than 7 dBi and the voltage standing wave ratio that must be lower than 2. To reduce antenna dimensions, application of various miniaturization techniques is considered. The antenna is modeled and subsequently optimized in the ANSYS HFFS program. Antenna cover and holder are designed for a protection and fastening of the antenna. The impact of these components on antenna performance is discussed. Finally, the optimized model of the antenna is fabricated, measured and its performance is discussed.
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