Farida, Fitri
Fakultas Teknik Universitas Maritim Raja Ali Haji

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Optimasi Lowpass Filter Mikrostrip Frekuensi 10,6 GHz dengan Metode Step-Impedansi Farida, Fitri
Jurnal Sustainable: Jurnal Hasil Penelitian dan Industri Terapan Vol 6 No 2 (2017): Jurnal Sustainable: Jurnal Hasil Penelitian dan Industri Terapan
Publisher : Fakultas Teknik Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (903.202 KB) | DOI: 10.31629/sustainable.v6i2.429

Abstract

In the telecommunication process filter is a device that has the function to pass the desired frequency and eliminate / undermine the unwanted frequency. The filter low-pass filter (LPF) is a filter that passes signals with a frequency lower than a certain cutoff frequency and attenuates signals with frequencies higher than the cutoff frequency. The exact frequency response of the filter depends on the filter design. In this paper described the design of low pass filter using the approximation Chebychev with cutoff frequency used is 10.6 GHz because this frequency is the high cutoff frequency in ultra wideband applications. The filter is designed with microstrip technology using step-impedance design method, by combining high impedance microstrip and low impedance microstrip with a certain length. Then design of microstrip filter with step-impedance method and will be done optimization for filter have good characteristic. The filter design uses Roger substrate RT 5880 with dielectric constant (εr) = 2,2 with thickness (h) = 0.508. The result obtained in this research is the filter able to pass the lower frequency of cut-off frequency. The results of the filter design simulation have met the expected specification, the return loss value displayed both where the value is smaller than -10 dB and insertion loss value is smaller than -3 dB and has smaller dimensions.
Perancangan Filter Bandpass dengan Teknik Penggabungan Filter Lowpass dan Highpass Farida, Fitri; Setijadi, Eko
Jurnal Sustainable: Jurnal Hasil Penelitian dan Industri Terapan Vol 7 No 1 (2018): Jurnal Sustainable: Jurnal Hasil Penelitian dan Industri Terapan
Publisher : Fakultas Teknik Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (378.026 KB) | DOI: 10.31629/sustainable.v7i1.436

Abstract

UWB technology started to become an attraction in the field of research since the Federal Communications Commission (FCC) allowing this communication is used for commercial communications at a frequency (3.1 GHz - 10.6 GHz). UWB has a very wide frequency range so that in practice there is often interference due to signal interference. Therefore in UWB system filter design is required to maintain UWB device. In telecommunications, filter is a transmission device that has the function to pass the desired frequency. In this paper designed bandpass filter which is applied for UWB technology. The designed bandpass filter is a combination of a lowpass filter (LPF) and a highpass filter (HPF). The lowpass filter has the characteristic of passing a frequency lower than its cut-off frequency. The highpass filter has the characteristic passing a frequency higher than its cut-off frequency. Considering the characteristics of both filters, the bandpass filter (BPF) is a combination of lowpass and highpass filters. In this research designed lowpass filter in microstrip technology with step impedance method, that is by combining high impedance microstrip and low impedance microstrip with a certain length. As for designing HPF using the distribution method of short circuit stubs by adding via ground on each stub. The design of this filter uses Roger substrate RT 5880 with dielectric constant εr = 2,2 with thickness (h) = 0.508 mm. In this research it can be concluded that bandpass filter can be designed with lowpass and highpass filter incorporation method, although at the merging of highpass and lowpass structures is disturbed by each other, but overall design shows matching bandpass.