Penggunaan Struktur CSRR untuk Peningkatan Kinerja BPF Berbasis Substrate Integrated Waveguide

Junas Haidi; Novelita Rahayu; Achmad Munir

doi:10.22146/jnteti.v15i1.18846

Junas Haidi Program Studi Teknik Elektro, Fakultas Teknik, Universitas Bengkulu, Bengkulu, Bengkulu 38371, Indonesia
Novelita Rahayu Pusat Riset Teknologi Penerbangan, Badan Riset dan Inovasi Nasional, Bogor, Jawa Barat 16350, Indonesia
Achmad Munir Laboratorium Radio Telekomunikasi dan Gelombang Mikro, Sekolah Teknik Elektro dan Informatika, Institut Teknologi Bandung, Bandung, Jawa Barat 40132, Indonesia

DOI: https://doi.org/10.22146/jnteti.v15i1.18846

Abstract

Makalah ini mengeksplorasi pemanfaatan struktur complementary split ring resonator (CSRR) untuk meningkatkan kinerja bandpass filter (BPF) berbasis substrate integrated waveguide (SIW). BPF berbasis SIW yang didesain menggunakan material RO 4003C dengan nilai permitivitas 3,38 dan rugi-rugi dielektrik 0,0027, dibuat dalam bentuk empat persegi panjang dengan ukuran 37,5 mm (panjang) × 35 mm (lebar) × 1,52 mm (tinggi). BPF berbasis SIW terdiri atas permukaan SIW dengan ukuran 22,4 mm (panjang) × 35 mm (lebar) dan 28 via. Pada bagian permukaan SIW dibuat CSRR berbentuk persegi panjang berukuran 4 mm (panjang) × 4 mm (lebar). Untuk mengoptimalkan kinerja BPF berbasis SIW, 12 CSRR dikonfigurasi menjadi enam baris dan dua kolom. Berdasarkan hasil eksplorasi yang telah dilakukan, jarak antara baris dan kolom CSRR secara substansial memengaruhi kinerja BPF. Makin dekat jarak baris antar-CSRR, makin jauh pergeseran frekuensi kerja kedua BPF ke arah frekuensi rendah. Penambahan CSRR pada BPF berbasis SIW berhasil menurunkan nilai koefisien kopling dari 0,38 menjadi 0,28. Penambahan CSRR pada BPF berbasis SIW telah menyebabkan nilai koefisien transmisi (S₂₁) menurun dari -2,32 dB menjadi -0,70 dB, yang berarti meningkatkan kinerja BPF sebesar 1,62 dB. Penambahan CSRR pada BPF berbasis SIW juga telah menurunkan nilai koefisien refleksi (S₁₁) dari -4,56 dB menjadi -10,96 dB atau meningkatkan kinerja BPF sebesar 6,4 dB.

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