KOTO, DIFA PUT ANISTY (2018) PERANCANGAN MIKROSTRIP BPF TRANSMISSION ZEROS DENGAN METODE SPIRAL DGS PADA APLIKASI C-BAND. S1 thesis, Universitas Mercu Buana Jakarta.
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Abstract
The development of wireless communication systems encourages the use of high frequency spectrum to obtain high data transfer rates. BPF Microstrip with spiral defected ground structure method is a transmission channel that has a minimalist size but able to make passband capacity becomes more selective and minimize the occurrence of noise. There are several ways to increase the value of transmission factor & Bandpass filter reflection better by applying Tapered Line [8] and Defected Ground Structure [7]. The basic of this study aims to create a bandpass filter that can pass the C Band frequency at a frequency of 5.76 GHz to 5.9 GHz. This filter is designed with the calculation of inductance and capacitance approximation approach. After that we obtain filter with Defected Ground Structure Spiral method and apply Tapered Transition, which has been simulated using Sonnet Lite software 15:52. This software describes the results of the filter performance graphic response, such as the comparison graph between the magnitude response to the cutoff frequency and the frequency response to the minimum attenuation, in order to evaluate the design results of the filter. The result of this simulation are Bandpass filter works at a frequency of 5.76 GHz - 5.9 GHz with insertion loss value of> -0.46 dB and return loss filter of <-33.98 dB. While the results of measurements with a vector network analyzer (VNA) obtained S11 value of> -6 dB and S21 of <-3.5 dB. Keywords : Bandpass filter, Mikrostrip, Tappered Line, Defected Ground Structure C-Band. Perkembangan sistim komunikasi wireless mendorong dipergunakannya spektrum frekuensi yang tinggi untuk mendapatkan kecepatan transfer data yang tinggi. Mikrostrip BPF dengan metode spiral defected ground structure merupakan saluran transmisi yang memiliki ukuran minimalis namun mampu membuat kapasitas passband menjadi lebih selektif dan meminimalisir terjadinya noise. Terdapat beberapa cara untuk meningkatkan nilai faktor transmisi & refleksi Bandpass filter menjadi lebih baik diantaranya dengan menerapkan Tapered Line [8] dan Defected Ground Structure [7]. Dasar penelitian ini bertujuan untuk membuat sebuah bandpass filter yang dapat meloloskan frekuensi C Band pada frekuensi 5,76 GHz hingga 5,9 GHz. Filter ini dirancang dengan perhitungan pendekatan aproksimasi induktansi dan kapasitansi. Setelah itu didapatlah filter dengan metode Spiral Defected Ground Structure dan menerapkan Tapered Transition, yang sudah dilakukan simulasi dengan menggunakan software Sonnet Lite 15.52. Software ini menggambarkan hasil respon grafik performansi filter, seperti grafik perbandingan antara respon magnitude terhadap frekuensi cut off dan respon frekuensi terhadap redaman minimum, agar dapat dilakukan evaluasi atas hasil perancangan filter. Hasil dari simulasi ini Bandpass filter bekerja pada frekuensi 5,76 GHz – 5,9 GHz dengan nilai insertion loss sebesar >-0.46 dB dan return loss filter sebesar <-33.98 dB. Sedangkan pada hasil pengukuran dengan alat vector network analyzer (VNA) didapatkan nilai S11 sebesar >-6 dB dan S21 sebesar <-3,5 dB. Keywords : Bandpass filter, Mikrostrip, Tappered Line, Defected Ground Structure, C-Band.
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