RANCANG BANGUN MINIATURISASI FILTER MULTIBAND MENGGUNAKAN RESONATOR SEPEREMPAT PANJANG GELOMBANG SKRIPSI

Anggi Nur Prastyo; Dwi Astuti Cahyasiswi;

Rancang Bangun Miniaturisasi Filter Multiband Menggunakan Resonator

Seperempat Panjang Gelombang
Anggi Nur Prastyo

Filter merupakan rangkaian yang berfungsi untuk mentransmisikan sinyal pada frekuensi tertentu
sekaligus menghilangkan siyal dengan frekuensi di luar rentang tersebut. Pada penelitian ini telah
dirancang sebuah multiband bandpass filter menggunakan resonator 1
4
⁄ panjang gelombang
dengan metode multi-coupled line dengan penambahan via through hole yang bertujuan untuk
mengurangi dimensi filter. Frekuensi kerja filter ini berada pada 1,75 GHz, 3,3 GHz, 4,8 GHz, dan
5,5 GHz. Berdasarkan hasil pengukuran, multiband bandpass filter menunjukkan Return Loss (S11)
-18,190 dB, FBW(-10dB) 2,8 %, Insertion Loss (S21) -1,137 dB, FBW(-10dB) 5,2 % pada frekuensi 1,74
GHz, menghasilkan Return Loss (S11) -18,830 dB, FBW(-10 dB) 18 %, Insertion Loss (S21) -0,865 dB,
FBW(-3 dB) 30 % pada frekuensi 3,3 GHz, menghasilkan Return Loss (S11) -18,136 dB, FBW(-10 dB) 1,8
%, Insertion Loss (S21) -2,335 dB, FBW(-3 dB) 3,5 % pada frekuensi 4,8 GHz, dan menghasilkan
Return Loss (S11) -17,762 dB, FBW(-10 dB) 5,4 %, Insertion Loss (S21) -3,139 dB, FBW(-3 dB) 7,2 %
pada frekuensi 5,5 GHz. Penambahan via through hole pada desain berhasil mengurangi ukuran
filter sebesar 71 %, sehingga penelitian ini sukses melakukan miniaturisasi dimensi filter tersebut.
Kata kunci: filter, miniaturisasi, via through hole

Miniaturization of Multiband Bandpass Filter Using Quarter-Wavelength

Resonator

Anggi Nur Prastyo

A filter is a circuit that functions to transmit signals at a certain frequency while simultaneously
eliminating signals with frequencies outside that range. In this study, a multiband bandpass filter
was designed using a 1/4 wavelength resonator with a multi-coupled line method, along with the
addition of through hole vias aimed at reducing the filter's dimensions. The operating frequencies
of this filter are 1.75 GHz, 3.3 GHz, 4.8 GHz, and 5.5 GHz. Based on the measurement results, the
multiband bandpass filter showed a Return Loss (S11) of -18.190 dB, a FBW (-10 dB) of 2.8%, an
Insertion Loss (S21) of -1.137 dB, and a FBW (-3 dB) of 5.2% at a frequency of 1.74 GHz. It
produced a Return Loss (S11) of -18.830 dB, a FBW (-10 dB) of 18%, an Insertion Loss (S21) of -
0.865 dB, and a FBW (-3 dB) of 30% at a frequency of 3.3 GHz. It also yielded a Return Loss (S11)
of -18.136 dB, a FBW (-10 dB) of 1.8%, an Insertion Loss (S21) of -2.335 dB, and a FBW (-3 dB) of
3.5% at a frequency of 4.8 GHz, and produced a Return Loss (S11) of -17.762 dB, a FBW (-10 dB)
of 5.4%, an Insertion Loss (S21) of -3.139 dB, and a FBW (-3 dB) of 7.2% at a frequency of 5.5
GHz. The addition of through hole vias in the design successfully reduced the filter's size by 71 %,
thereby achieving the miniaturization of the filter dimensions in this study.
Keywords : filter, miniaturization, via through hole