ABSTRAKSI: Antena Tricula Omnidireksional Segitiga 300 MHz - 3000 Mhz Bercatuan Monopol-konik ini, dirancang bangun dengan tujuan untuk menyediakan prototipe antena omnidireksional berpita sangat lebar, supaya dapat digunakan oleh beberapa operator secara bergotong royong, untuk menghemat menara dan lahannya. Spesifikasi yang harus dipenuhi adalah frekuensi kerja 0,3 GHz – 3,0 GHz dalam VSWR maksimum 1,5 pada terminal 50O unbalance, gain minimum 2,14dBi, omnidireksional berpolaritas linier. Ini harus dibangun dengan saluran strip kembar jajar, berdasarkan transformator segitiga, untuk digunakan di udara atau hampa menggunakan balun monopol-konik supaya berpita lebar tetapi tanpa lilitan pada toroid. Dengan kaidah saluran strip tunggal jajar, diperoleh kontruksi (susunan bahan dan ukuran masing-masing) sebagai berikut: =0,95 , L=11cm, er1=6,128(mika), er2=5,5926(kaca), er3=4,8023(gabus komputer), er4=3,88(FR2 Eproxy PCB), er5=2,9495(A4+lem), er6=2,142(kertas bufalo), er7=1,6283(A4 70gr), er8=1,315587(kardus kue), er9=1,1297(streoform). Menggunakan strip tembaga jajar lebar 0,344cm(w) x panjang 11cm (l) x spasi 2cm (s) dipilih balun monopol-konik dibangun dari lembaran tembaga bersudut 900 tinggi=1,5cm, berterminal ZT=50O unbalance. Melalui pengujian spesifikasi di pekarangan IT TELKOM didapat hasil sebagai berikut. Pada VSWR = 1,5 frekuensi kerja 943,2 MHz – 3000 MHz pada terminal ZT=50O unbalance. Jadi, pada proyek akhir ini didapatkan satu Bandwidth yaitu 2057,8 MHz dengan pola radiasi omnidireksional, polarisasi elips, dan gain sebesar 5,53 dBi (900 MHz), 8,813 dBi (1800MHz), dan 7,601 dBi (2400 MHz). Dengan pola radiasi yang omnidireksional, polarisasi elips, dan gain = 2,14 dBi, maka antena sudah mendekati spesifikasi yang ditentukan. Untuk mendapatkan frekuensi menjadi 0,3 GHz – 3,0 GHz disarankan mempertinggi spasi dari 20 mm menjadi 50 mm dan menyesuaikan tinggi monokonik dari 15 mm menjadi 20 mm yang tergandeng kapasitive kepada strip. Sedangkan meyakinkan berpolaritas linier dan gambaran polaradiasinya tepat, disarankan diuji di ruang tanpa gema yang berantena uji berpola-berkas pensil.Kata Kunci : Kata kunci: antena tricula omnidireksional, Monopol-konik, unbalance, gradual segitiga,ABSTRACT: Tricula Omnidirectional Triangle Antenna for Range 300 MHz – 3000 MHz With Monopol-konik is designed with goals, namely to produce a prototype antenna omnidireksional with a very wide band that can be used by multiple operators simultaneously, to save the tower and land. Specification that must be met are: the frequency of 0,3 GHz-3,0 GHz with a VSWR maximum 1,5 in the terminal 50 ohm unbalance, 2,14 dBi minimum gain, the radiation pattern omnidirectional and with the polarity linier. The antenna was built with twochannel strip twin row, based on the triangle pat for use in air or vacuum, use a portion monopol-konik to produce a wide band but without toroid. By using the principle channel strip twin row can be obtained by the construction / layout and size of each are as follows: ßl = 0,95p, L = 11 cm, 1 r = 6,128 (mika), 2 r = 5,5926 (glass), 3 r = 4,8023 (computer stopple), 4 r = 3,88 (FR2 Eproxy PCB), 5 r = 2,9495 (A4 + glue), 6 r = 2,142 (Bufalo paper), 7 r = 1,6283 (A4 70 gr), 8 r = 1,315587 (cake cardboard), 9 r = 1,1297 (styrofoam) using a copper strip with a row 0,344 cm (w) x 11 cm long (L) x 2 cm space (s). Monopol-konik portion is made of sheet copper of 90o, high (s) = 2 cm, the terminal (ZT) = 50 unbalance. Through the test specifications have been implemented in yards Institution IT Telkom results obtained VSWR maximum 1,5 but with working frequency 943,2 MHz to 3000 MHz in the terminal unbalance ZT 50 . So, from the end of this project established the bandwidth of 2057,8 MHz with the radiation pattern omnidirectional, polarization ellipse, and the gain of 5,53 dBi (900 MHz), 8,813 dBi (1800 MHz), and 7,601 dBi (2400 MHz). With omnidirectional radiation pattern, polarization ellips, and the gain is greater than 2,14 dBi, the antenna is already close to the specification have been determined. To get a frequency at range 0,3 GHz – 3,0 GHz it is suggested to enhance the space from 20 mm become 50 mm and adjust the high of monokonik from 15 mm become 20 mm so that kapasitif be on the strip. Meanwhile, to make sure the polarity linier and radiation pattern of the picture right, it is recommended to test in space without the antenna resonance where the test pattern files have used the pencil.Keyword: Keywords: tricula omnidirectional antenna, monopol-konik, unbalance, triangle gradual,