AbstrakPita frekuensi 5,8 GHz telah ditetapkan oleh Kementerian Komunikasi dan Informatika Republik Indonesia untuk layanan pita lebar nirkabel yang juga digunakan oleh layanan Wireless Local Area Network (WLAN). Selayaknya sistem komunikasi nirkabel, perangkat keras pada pita frekuensi ini memerlukan tapis lolos rentang untuk memilih frekuensi, menekan derau dan interferensi. Penelitian ini merancang tapis mikrostrip parallel coupled line dengan tanggapan lolos rentang. Bahan yang digunakan adalah Rogers RO4350B (permitivitas relatif 3,66 pada frekuensi 8-40 GHz dan rugi-rugi dielektrik 0,0037 diukur pada frekuensi 10 GHz). Spesifikasi tapis diturunkan dari analisis terhadap datasheet tapis komersial yaitu lebar pita 100 MHz, nilai insertion loss <1 dB dan return loss ≥11 dB, orde tiga polinomial Chebyshev. Perangkat lunak yang digunakan adalah AWR Design Environment 10 untuk menentukan skematika rangkaian dan nilai komponen, serta simulator elektromagnetik CST Microwave Studio 2014 untuk verifikasi desain. Proses optimasi desain untuk mencapai spesifikasi dibantu dengan Design of Experiment (DOE). Hasil simulasi DOE diperoleh nilai komponen baru yaitu, W dan L 1 masing-masing sebesar 1,61 mm dan 7,23 mm. Dengan nilai komponen baru tersebut diperoleh nilai insertion loss dan return loss masing-masing sebesar 1,51 dB dan 29,32 dB, dan lebar pita sebesar 67 MHz.Abstract 5.8 GHz band has been established by the Ministry of Communication and Informatics of the Republic of Indonesia for wireless broadband which are also used by the Wireless Local Area Network (WLAN). As a wireless communication system, hardware in this band requires filter to select frequencies, suppress noise and interference. This research designed a microstrip parallel coupled line band pass filter. The material used is Rogers RO4350B (relative permittivity 3.66 at 8-40 GHz and 0.0037 dielectric losses measured at 10 GHz). The filter specifications are derived from the analysis of the commercial filter datasheet of 100 MHz bandwidth, insertion loss <1 dB and return loss ≥11 dB, three-order Chebyshev polynomials. The software used is AWR Design Environment 10 to determine the circuit and component schematic values, the CST Microwave Studio 2014 electromagnetic simulator for design verification. The design optimization process to achieve specifications is aided by Design of Experiment (DOE). The results of the DOE obtained the new component values, W and L1 1.61 mm and 7.23 mm respectively. With the value of new components are obtained insertion loss and return loss 1.51 dB and 29.32 dB respectively, and bandwidth 67 MHz.
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