A Wideband Termination Based on Laser-Scribed Lossy Microstrip Line Structures
Laser-direct writing has become an alternative method to fabricate microwave devices. We present a laser-scribed wideband open-end termination that relies on conductor loss of the microstrip line structure to obtain effective absorption. The proposed design consists of a resistive film overlapped on...
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MDPI AG
2021-07-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/15/6960 |
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| author | Ruo-Zhou Li Zheyuan Wu Junhui Ji Xiaoxing Yin Jing Yan Yuming Fang Ying Yu |
| author_facet | Ruo-Zhou Li Zheyuan Wu Junhui Ji Xiaoxing Yin Jing Yan Yuming Fang Ying Yu |
| author_sort | Ruo-Zhou Li |
| collection | DOAJ |
| description | Laser-direct writing has become an alternative method to fabricate microwave devices. We present a laser-scribed wideband open-end termination that relies on conductor loss of the microstrip line structure to obtain effective absorption. The proposed design consists of a resistive film overlapped on a strip conductor, providing an enlarged sheet-resistance range (20 Ω/□~1.2 kΩ/□) of the resistive film to reduce the fabrication difficulties. The resistive film is in tapered shape to enable small gradual changes in impedance, yielding minimized reflections (|S<sub>11</sub>|). The prototype is demonstrated utilizing the laser-direct writing technique, with a measured |S<sub>11</sub>| over −15 dB from 6 GHz to at least 30 GHz. The termination can also be used for attenuation over a −10 dB attenuation level (>8.5 GHz) with a low reflection level better than −15 dB (>2.0 GHz). This study can be employed for the applications where cheap wideband planar terminations are needed and promote fast, flexible, and low-cost prototyping or modification of the existing microwave circuits. |
| first_indexed | 2024-03-10T09:18:29Z |
| format | Article |
| id | doaj.art-0dd34cb14c934b1cb2614cce79bdb259 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T09:18:29Z |
| publishDate | 2021-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-0dd34cb14c934b1cb2614cce79bdb2592023-11-22T05:22:15ZengMDPI AGApplied Sciences2076-34172021-07-011115696010.3390/app11156960A Wideband Termination Based on Laser-Scribed Lossy Microstrip Line StructuresRuo-Zhou Li0Zheyuan Wu1Junhui Ji2Xiaoxing Yin3Jing Yan4Yuming Fang5Ying Yu6College of Electronic and Optical Engineering & College of Microelectronics, Nanjing University of Posts and Telecommunications, Nanjing 210023, ChinaCollege of Electronic and Optical Engineering & College of Microelectronics, Nanjing University of Posts and Telecommunications, Nanjing 210023, ChinaCollege of Electronic and Optical Engineering & College of Microelectronics, Nanjing University of Posts and Telecommunications, Nanjing 210023, ChinaSchool of Information Science and Engineering, Southeast University, Nanjing 210096, ChinaCollege of Electronic and Optical Engineering & College of Microelectronics, Nanjing University of Posts and Telecommunications, Nanjing 210023, ChinaCollege of Electronic and Optical Engineering & College of Microelectronics, Nanjing University of Posts and Telecommunications, Nanjing 210023, ChinaCollege of Electronic and Optical Engineering & College of Microelectronics, Nanjing University of Posts and Telecommunications, Nanjing 210023, ChinaLaser-direct writing has become an alternative method to fabricate microwave devices. We present a laser-scribed wideband open-end termination that relies on conductor loss of the microstrip line structure to obtain effective absorption. The proposed design consists of a resistive film overlapped on a strip conductor, providing an enlarged sheet-resistance range (20 Ω/□~1.2 kΩ/□) of the resistive film to reduce the fabrication difficulties. The resistive film is in tapered shape to enable small gradual changes in impedance, yielding minimized reflections (|S<sub>11</sub>|). The prototype is demonstrated utilizing the laser-direct writing technique, with a measured |S<sub>11</sub>| over −15 dB from 6 GHz to at least 30 GHz. The termination can also be used for attenuation over a −10 dB attenuation level (>8.5 GHz) with a low reflection level better than −15 dB (>2.0 GHz). This study can be employed for the applications where cheap wideband planar terminations are needed and promote fast, flexible, and low-cost prototyping or modification of the existing microwave circuits.https://www.mdpi.com/2076-3417/11/15/6960laser-direct writingsinteringradio frequencywideband termination |
| spellingShingle | Ruo-Zhou Li Zheyuan Wu Junhui Ji Xiaoxing Yin Jing Yan Yuming Fang Ying Yu A Wideband Termination Based on Laser-Scribed Lossy Microstrip Line Structures Applied Sciences laser-direct writing sintering radio frequency wideband termination |
| title | A Wideband Termination Based on Laser-Scribed Lossy Microstrip Line Structures |
| title_full | A Wideband Termination Based on Laser-Scribed Lossy Microstrip Line Structures |
| title_fullStr | A Wideband Termination Based on Laser-Scribed Lossy Microstrip Line Structures |
| title_full_unstemmed | A Wideband Termination Based on Laser-Scribed Lossy Microstrip Line Structures |
| title_short | A Wideband Termination Based on Laser-Scribed Lossy Microstrip Line Structures |
| title_sort | wideband termination based on laser scribed lossy microstrip line structures |
| topic | laser-direct writing sintering radio frequency wideband termination |
| url | https://www.mdpi.com/2076-3417/11/15/6960 |
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