Design of a Modified Compact Coupler with Unwanted Harmonics Suppression for L-Band Applications
This paper presents the design, analysis, and fabrication of a new miniaturized microstrip branch line coupler (BLC) with high harmonics suppression. The T-shaped resonators, open stubs cross-shaped resonators and radial stubs are used in the proposed coupler design. The designed BLC operates at 1 G...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-05-01
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| Series: | Electronics |
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| Online Access: | https://www.mdpi.com/2079-9292/11/11/1747 |
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| author | Saeed Roshani Salah I. Yahya Sobhan Roshani Amir Hossein Farahmand Siroos Hemmati |
| author_facet | Saeed Roshani Salah I. Yahya Sobhan Roshani Amir Hossein Farahmand Siroos Hemmati |
| author_sort | Saeed Roshani |
| collection | DOAJ |
| description | This paper presents the design, analysis, and fabrication of a new miniaturized microstrip branch line coupler (BLC) with high harmonics suppression. The T-shaped resonators, open stubs cross-shaped resonators and radial stubs are used in the proposed coupler design. The designed BLC operates at 1 GHz frequency, which can suppress up to 5th spurious harmonics with a 20 dB level of attenuation. High miniaturization of about 86% is obtained for the proposed BLC, which is corresponding to the normalized size of 0.009 λg<sup>2</sup>. The measured values of isolation and return loss are obtained 28 dB and 29 dB, respectively, while the measured insertion loss of better than 0.2 dB is achieved at the operating frequency. Additionally, the operating bandwidth of the designed coupler ranges from 0.905 GHz up to 1.105 GHz, which shows a 200 MHz operating bandwidth or a fractional bandwidth (FBW) of 20%. The presented BLC is fabricated and measured, where the measurements confirm the simulated results. The designed coupler shows desirable performance compared to the recent designed couplers. |
| first_indexed | 2024-03-10T01:24:11Z |
| format | Article |
| id | doaj.art-b926f2ed2bc34eb9bf95f14cc46fd670 |
| institution | Directory Open Access Journal |
| issn | 2079-9292 |
| language | English |
| last_indexed | 2024-03-10T01:24:11Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Electronics |
| spelling | doaj.art-b926f2ed2bc34eb9bf95f14cc46fd6702023-11-23T13:55:15ZengMDPI AGElectronics2079-92922022-05-011111174710.3390/electronics11111747Design of a Modified Compact Coupler with Unwanted Harmonics Suppression for L-Band ApplicationsSaeed Roshani0Salah I. Yahya1Sobhan Roshani2Amir Hossein Farahmand3Siroos Hemmati4Department of Electrical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah 1477893855, IranDepartment of Communication and Computer Engineering, Cihan University-Erbil, Erbil 44001, IraqDepartment of Electrical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah 1477893855, IranDepartment of Electrical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah 1477893855, IranDepartment of Electrical Engineering, Faculty of Energy, Kermanshah University of Technology, Kermanshah 6715685420, IranThis paper presents the design, analysis, and fabrication of a new miniaturized microstrip branch line coupler (BLC) with high harmonics suppression. The T-shaped resonators, open stubs cross-shaped resonators and radial stubs are used in the proposed coupler design. The designed BLC operates at 1 GHz frequency, which can suppress up to 5th spurious harmonics with a 20 dB level of attenuation. High miniaturization of about 86% is obtained for the proposed BLC, which is corresponding to the normalized size of 0.009 λg<sup>2</sup>. The measured values of isolation and return loss are obtained 28 dB and 29 dB, respectively, while the measured insertion loss of better than 0.2 dB is achieved at the operating frequency. Additionally, the operating bandwidth of the designed coupler ranges from 0.905 GHz up to 1.105 GHz, which shows a 200 MHz operating bandwidth or a fractional bandwidth (FBW) of 20%. The presented BLC is fabricated and measured, where the measurements confirm the simulated results. The designed coupler shows desirable performance compared to the recent designed couplers.https://www.mdpi.com/2079-9292/11/11/1747branch line coupler (BLC)fractional bandwidthharmonic suppressionresonatorssize reduction |
| spellingShingle | Saeed Roshani Salah I. Yahya Sobhan Roshani Amir Hossein Farahmand Siroos Hemmati Design of a Modified Compact Coupler with Unwanted Harmonics Suppression for L-Band Applications Electronics branch line coupler (BLC) fractional bandwidth harmonic suppression resonators size reduction |
| title | Design of a Modified Compact Coupler with Unwanted Harmonics Suppression for L-Band Applications |
| title_full | Design of a Modified Compact Coupler with Unwanted Harmonics Suppression for L-Band Applications |
| title_fullStr | Design of a Modified Compact Coupler with Unwanted Harmonics Suppression for L-Band Applications |
| title_full_unstemmed | Design of a Modified Compact Coupler with Unwanted Harmonics Suppression for L-Band Applications |
| title_short | Design of a Modified Compact Coupler with Unwanted Harmonics Suppression for L-Band Applications |
| title_sort | design of a modified compact coupler with unwanted harmonics suppression for l band applications |
| topic | branch line coupler (BLC) fractional bandwidth harmonic suppression resonators size reduction |
| url | https://www.mdpi.com/2079-9292/11/11/1747 |
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