Design and Analysis of an Ultra-Wideband High-Precision Active Phase Shifter in 0.18 μm SiGe BiCMOS Technology
This paper presents an active phase shifter for phased array system applications, implemented using 0.18 μm SiGe BiCMOS technology. The phase shifter circuit consists of a wideband quadrature signal generator, a vector modulator, an input balun, and an output balun. To enhance the bandwidth, a polyp...
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MDPI AG
2025-05-01
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| Series: | Journal of Low Power Electronics and Applications |
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| Online Access: | https://www.mdpi.com/2079-9268/15/2/30 |
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| author | Hao Jiang Zenglong Zhao Nengxu Zhu Fanyi Meng |
| author_facet | Hao Jiang Zenglong Zhao Nengxu Zhu Fanyi Meng |
| author_sort | Hao Jiang |
| collection | DOAJ |
| description | This paper presents an active phase shifter for phased array system applications, implemented using 0.18 μm SiGe BiCMOS technology. The phase shifter circuit consists of a wideband quadrature signal generator, a vector modulator, an input balun, and an output balun. To enhance the bandwidth, a polyphase filter is employed as the quadrature signal generator, and a two-stage RC-CR filter with a highly symmetrical miniaturized layout is cascaded to create multiple resonant points, thus extending the phase shifter’s bandwidth to cover the required range. The gain of the variable-gain amplifier within the vector modulator is adjustable by varying the tail current, thereby enlarging the range of selectable points, improving phase-shifting accuracy, and reducing gain fluctuations. The measurement results show that the proposed active phase shifter achieves an RMS phase error of less than 2° and a gain variation ranging from −1.2 dB to 0.1 dB across a 20 GHz to 30 GHz bandwidth at room temperature. The total chip area is 0.4 mm<sup>2</sup>, with a core area of 0.165 mm<sup>2</sup>, and consumes 19.5 mW of power from a 2.5 V supply. |
| format | Article |
| id | doaj-art-fb4a462affe04eb2b37ac7e30a01de90 |
| institution | OA Journals |
| issn | 2079-9268 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Low Power Electronics and Applications |
| spelling | doaj-art-fb4a462affe04eb2b37ac7e30a01de902025-08-20T02:21:03ZengMDPI AGJournal of Low Power Electronics and Applications2079-92682025-05-011523010.3390/jlpea15020030Design and Analysis of an Ultra-Wideband High-Precision Active Phase Shifter in 0.18 μm SiGe BiCMOS TechnologyHao Jiang0Zenglong Zhao1Nengxu Zhu2Fanyi Meng3The 13th Research Institute, China Electronics Technology Group Corporation, Shijiazhuang 050051, ChinaSchool of Microelectronics, Tianjin University, Tianjin 300072, ChinaSchool of Microelectronics, Tianjin University, Tianjin 300072, ChinaSchool of Microelectronics, Tianjin University, Tianjin 300072, ChinaThis paper presents an active phase shifter for phased array system applications, implemented using 0.18 μm SiGe BiCMOS technology. The phase shifter circuit consists of a wideband quadrature signal generator, a vector modulator, an input balun, and an output balun. To enhance the bandwidth, a polyphase filter is employed as the quadrature signal generator, and a two-stage RC-CR filter with a highly symmetrical miniaturized layout is cascaded to create multiple resonant points, thus extending the phase shifter’s bandwidth to cover the required range. The gain of the variable-gain amplifier within the vector modulator is adjustable by varying the tail current, thereby enlarging the range of selectable points, improving phase-shifting accuracy, and reducing gain fluctuations. The measurement results show that the proposed active phase shifter achieves an RMS phase error of less than 2° and a gain variation ranging from −1.2 dB to 0.1 dB across a 20 GHz to 30 GHz bandwidth at room temperature. The total chip area is 0.4 mm<sup>2</sup>, with a core area of 0.165 mm<sup>2</sup>, and consumes 19.5 mW of power from a 2.5 V supply.https://www.mdpi.com/2079-9268/15/2/30SiGe BiCMOSphase shifterquadrature signal generatorvector modulator |
| spellingShingle | Hao Jiang Zenglong Zhao Nengxu Zhu Fanyi Meng Design and Analysis of an Ultra-Wideband High-Precision Active Phase Shifter in 0.18 μm SiGe BiCMOS Technology Journal of Low Power Electronics and Applications SiGe BiCMOS phase shifter quadrature signal generator vector modulator |
| title | Design and Analysis of an Ultra-Wideband High-Precision Active Phase Shifter in 0.18 μm SiGe BiCMOS Technology |
| title_full | Design and Analysis of an Ultra-Wideband High-Precision Active Phase Shifter in 0.18 μm SiGe BiCMOS Technology |
| title_fullStr | Design and Analysis of an Ultra-Wideband High-Precision Active Phase Shifter in 0.18 μm SiGe BiCMOS Technology |
| title_full_unstemmed | Design and Analysis of an Ultra-Wideband High-Precision Active Phase Shifter in 0.18 μm SiGe BiCMOS Technology |
| title_short | Design and Analysis of an Ultra-Wideband High-Precision Active Phase Shifter in 0.18 μm SiGe BiCMOS Technology |
| title_sort | design and analysis of an ultra wideband high precision active phase shifter in 0 18 μm sige bicmos technology |
| topic | SiGe BiCMOS phase shifter quadrature signal generator vector modulator |
| url | https://www.mdpi.com/2079-9268/15/2/30 |
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