Semicircular Patch-Embedded Vivaldi Antenna for Miniaturized UWB Radar Sensors
A microstrip-to-slot line-fed miniaturized Vivaldi antenna using semicircular patch embedment is proposed in this study. The conventional Vivaldi antenna has ultrawide bandwidth, but suffers from low gain in the low-frequency band. The proposed antenna topology incorporates the embedment of semicirc...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-10-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/20/21/5988 |
| _version_ | 1797550107203207168 |
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| author | Jungwoo Seo Jae Hee Kim Jungsuek Oh |
| author_facet | Jungwoo Seo Jae Hee Kim Jungsuek Oh |
| author_sort | Jungwoo Seo |
| collection | DOAJ |
| description | A microstrip-to-slot line-fed miniaturized Vivaldi antenna using semicircular patch embedment is proposed in this study. The conventional Vivaldi antenna has ultrawide bandwidth, but suffers from low gain in the low-frequency band. The proposed antenna topology incorporates the embedment of semicircular patch elements into the side edge of the antenna. This enables the phases of electric fields at both ends of the antenna to be out of phase. Since the distance between the two ends are λ<sub>L</sub>/2 where λ<sub>L</sub> is the wavelength at a low operating frequency, this antenna topology can achieve the constructive addition of electrical fields at the radiating end, leading to gain enhancement at the chosen low frequency. In comparison with the conventional Vivaldi antenna, the proposed antenna has a wider bandwidth from 2.84 to 9.83 GHz. Moreover, the simulated result shows a gain enhancement of 5 dB at low frequency. This cannot be realized by the conventional low-band impedance matching techniques only relying on slotted topologies. The measured results of this proposed antenna with a size of 45 × 40 × 0.8 mm<sup>3</sup> are in good agreement with the simulated results. |
| first_indexed | 2024-03-10T15:24:47Z |
| format | Article |
| id | doaj.art-9793e61d6b1047fd8cd1bc065567306e |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T15:24:47Z |
| publishDate | 2020-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-9793e61d6b1047fd8cd1bc065567306e2023-11-20T18:10:07ZengMDPI AGSensors1424-82202020-10-012021598810.3390/s20215988Semicircular Patch-Embedded Vivaldi Antenna for Miniaturized UWB Radar SensorsJungwoo Seo0Jae Hee Kim1Jungsuek Oh2Institute of New Media and Communications, Seoul National University, Seoul 08826, KoreaSchool of Electrical, Electronics and Communication Engineering, Korea University of Technology and Education, Cheonan 31253, KoreaInstitute of New Media and Communications, Seoul National University, Seoul 08826, KoreaA microstrip-to-slot line-fed miniaturized Vivaldi antenna using semicircular patch embedment is proposed in this study. The conventional Vivaldi antenna has ultrawide bandwidth, but suffers from low gain in the low-frequency band. The proposed antenna topology incorporates the embedment of semicircular patch elements into the side edge of the antenna. This enables the phases of electric fields at both ends of the antenna to be out of phase. Since the distance between the two ends are λ<sub>L</sub>/2 where λ<sub>L</sub> is the wavelength at a low operating frequency, this antenna topology can achieve the constructive addition of electrical fields at the radiating end, leading to gain enhancement at the chosen low frequency. In comparison with the conventional Vivaldi antenna, the proposed antenna has a wider bandwidth from 2.84 to 9.83 GHz. Moreover, the simulated result shows a gain enhancement of 5 dB at low frequency. This cannot be realized by the conventional low-band impedance matching techniques only relying on slotted topologies. The measured results of this proposed antenna with a size of 45 × 40 × 0.8 mm<sup>3</sup> are in good agreement with the simulated results.https://www.mdpi.com/1424-8220/20/21/5988miniaturization methodsultrawideband antennasVivaldi antennas |
| spellingShingle | Jungwoo Seo Jae Hee Kim Jungsuek Oh Semicircular Patch-Embedded Vivaldi Antenna for Miniaturized UWB Radar Sensors Sensors miniaturization methods ultrawideband antennas Vivaldi antennas |
| title | Semicircular Patch-Embedded Vivaldi Antenna for Miniaturized UWB Radar Sensors |
| title_full | Semicircular Patch-Embedded Vivaldi Antenna for Miniaturized UWB Radar Sensors |
| title_fullStr | Semicircular Patch-Embedded Vivaldi Antenna for Miniaturized UWB Radar Sensors |
| title_full_unstemmed | Semicircular Patch-Embedded Vivaldi Antenna for Miniaturized UWB Radar Sensors |
| title_short | Semicircular Patch-Embedded Vivaldi Antenna for Miniaturized UWB Radar Sensors |
| title_sort | semicircular patch embedded vivaldi antenna for miniaturized uwb radar sensors |
| topic | miniaturization methods ultrawideband antennas Vivaldi antennas |
| url | https://www.mdpi.com/1424-8220/20/21/5988 |
| work_keys_str_mv | AT jungwooseo semicircularpatchembeddedvivaldiantennaforminiaturizeduwbradarsensors AT jaeheekim semicircularpatchembeddedvivaldiantennaforminiaturizeduwbradarsensors AT jungsuekoh semicircularpatchembeddedvivaldiantennaforminiaturizeduwbradarsensors |