BPF comparison of hairpin line and square open-loop resonator method

Yuyun Siti Rohmah, Budi Prasetya, Dwi Andi Nurmantris, Sarah Mulyawati, Reza Dipayana


This paper presents the comparison of two methods of bandpass filter (BPF) design using hairpin-line and square open loop resonator. Both methods were applied to obtain filter designs that can work at television broadcasting system. Bandpass filter was simulated using design software and fabricated using epoxy FR-4 substrate. The results of simulation and measurement showed return loss value at 27.3 dB for hairpin line BPF and 25.901 for square open loop resonator BPF. Meanwhile, VSWR parameter values were 1.09 and 1.1067 for hairpin line and square open loop BPF respectively. The insertion loss values for the Hairpin line BPF and square open loop BPF were 6.9 and 5.9511 dB, respectively. Fractional bandwidth (FBW), for hairpin line BPF was 6.7% while for square open loop BPF was 4.8%. Regarding the size, the dimension of square open loop resonator was approximately three times larger than that of hairpin-line band pass filter.


BPF; hairpin line; square open loop resonator;


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