Switchable Bandpass/Bandstop Filter Using Liquid Metal Alloy as Fluidic Switch
In this paper, we propose a switchable band-pass/band-stop filter using liquid metal alloy as a fluidic switch. The filter is designed based on the Chebyshev response and implemented using a three-stage quarter-wavelength resonant structure. The fluidic switch is realized by injecting eutectic galli...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-03-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/19/5/1081 |
| _version_ | 1828272887903027200 |
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| author | Eiyong Park Minjae Lee Sungjoon Lim |
| author_facet | Eiyong Park Minjae Lee Sungjoon Lim |
| author_sort | Eiyong Park |
| collection | DOAJ |
| description | In this paper, we propose a switchable band-pass/band-stop filter using liquid metal alloy as a fluidic switch. The filter is designed based on the Chebyshev response and implemented using a three-stage quarter-wavelength resonant structure. The fluidic switch is realized by injecting eutectic gallium–indium (EGaIn) in the microfluidic stubs, engraved in the polydimethylsiloxane (PDMS) material. When the fluidic switch selects the short stub using a micro-pump and microprocessor for switching, the filter acts as a bandpass filter (BPF) with the short stubs. When the fluidic switch selects the open stub, the filter acts as the bandstop filter (BSF) with the open stubs. At the BPF mode, the center frequency is 2.5 GHz and the 1-dB bandwidth is 1.75–3.07 GHz. The insertion loss is 0.5-dB ± 0.4-dB. At the BSF mode, the 15-dB bandstop bandwidth is 2.4–2.65 GHz with 2.5 GHz center frequency. |
| first_indexed | 2024-04-13T06:12:59Z |
| format | Article |
| id | doaj.art-c2f9af63dca44157a763257f836d0918 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-13T06:12:59Z |
| publishDate | 2019-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-c2f9af63dca44157a763257f836d09182022-12-22T02:58:57ZengMDPI AGSensors1424-82202019-03-01195108110.3390/s19051081s19051081Switchable Bandpass/Bandstop Filter Using Liquid Metal Alloy as Fluidic SwitchEiyong Park0Minjae Lee1Sungjoon Lim2School of Electrical and Electronics Engineering, College of Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, KoreaSchool of Electrical and Electronics Engineering, College of Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, KoreaSchool of Electrical and Electronics Engineering, College of Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, KoreaIn this paper, we propose a switchable band-pass/band-stop filter using liquid metal alloy as a fluidic switch. The filter is designed based on the Chebyshev response and implemented using a three-stage quarter-wavelength resonant structure. The fluidic switch is realized by injecting eutectic gallium–indium (EGaIn) in the microfluidic stubs, engraved in the polydimethylsiloxane (PDMS) material. When the fluidic switch selects the short stub using a micro-pump and microprocessor for switching, the filter acts as a bandpass filter (BPF) with the short stubs. When the fluidic switch selects the open stub, the filter acts as the bandstop filter (BSF) with the open stubs. At the BPF mode, the center frequency is 2.5 GHz and the 1-dB bandwidth is 1.75–3.07 GHz. The insertion loss is 0.5-dB ± 0.4-dB. At the BSF mode, the 15-dB bandstop bandwidth is 2.4–2.65 GHz with 2.5 GHz center frequency.http://www.mdpi.com/1424-8220/19/5/1081bandpass filter (BPF)bandstop filter (BSF)liquid metalmicro-pumpswitchable |
| spellingShingle | Eiyong Park Minjae Lee Sungjoon Lim Switchable Bandpass/Bandstop Filter Using Liquid Metal Alloy as Fluidic Switch Sensors bandpass filter (BPF) bandstop filter (BSF) liquid metal micro-pump switchable |
| title | Switchable Bandpass/Bandstop Filter Using Liquid Metal Alloy as Fluidic Switch |
| title_full | Switchable Bandpass/Bandstop Filter Using Liquid Metal Alloy as Fluidic Switch |
| title_fullStr | Switchable Bandpass/Bandstop Filter Using Liquid Metal Alloy as Fluidic Switch |
| title_full_unstemmed | Switchable Bandpass/Bandstop Filter Using Liquid Metal Alloy as Fluidic Switch |
| title_short | Switchable Bandpass/Bandstop Filter Using Liquid Metal Alloy as Fluidic Switch |
| title_sort | switchable bandpass bandstop filter using liquid metal alloy as fluidic switch |
| topic | bandpass filter (BPF) bandstop filter (BSF) liquid metal micro-pump switchable |
| url | http://www.mdpi.com/1424-8220/19/5/1081 |
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