RANCANG BANGUN ANTENA Yagi-LPDA PADA FREKUENSI 162 MHz UNTUK AIS PADA KAPAL LAUT DI PERAIRAN PULAU BALI

The role of the sea is very important as unifying nation and territory Indonesia consequently Government obliged to administer governance in field law enforcement both against threats violations use waters maintain create shipping safety security. One way increase ability apparatus government monitor secure Unitary State Republic AIS (Automatic Identification System) system. This used movement ships provide or receive information so that actions can harm be prevented. Currently, are equipped with radar, but scope radar emitted by Indonesian still small small. To overcome these problems author wants develop a thesis title "YAGI-LPDA Antenna Design at 162 MHz Frequency for Automatic System (AIS) on Ships Bali Island Waters" antenna works being connected system frequency which able reach presence Strait, Lombok Strait its surroundings. Yagi-LPDA design prototype accordance MMANA-GAL software, namely form an SWR value 1.73, gain 8.12 dBi, radiation pattern unidirectional during ship monitoring process, work well seen from direction beam same focused Benoa waters, Nusa Penida.