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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Ozeren, E. Cahskan, C. Davulcu, M. Kayahan, H. Gurbuz, Y. |
| Copyright Year | 2014 |
| Description | Author affiliation: Fac. of Eng. & Natural Sci. - FENS, Sabanci Univ., Istanbul, Turkey (Ozeren, E.; Cahskan, C.; Davulcu, M.; Kayahan, H.; Gurbuz, Y.) |
| Abstract | This paper presents a 4-bit digitally controlled phase shifter for X-band (8-12.5 GHz) phased-arrays, implemented in 0.25-μm SiGe BiCMOS process. Distributed active switches are utilized in first three bits. On-chip inductances are used to provide 22.5° phase shift steps. The placement and the geometry of these inductances are optimized for minimum phase error and insertion loss. In order to compensate the gain variations of this stage, a single stage variable gain amplifier is used. The fourth bit which provides 0/180° phase shift is obtained in third amplification stage, with switching between common base-common emitter configuration. With utilization of this technique overall phase error is significantly decreased and overall gain is increased. The phase shifter achieves 7dB gain with 3 dB of gain error. 360° phase shift is achieved in 4 bit resolution with a phase error of 0.5° at center frequency of 10GHz, and maximum 22° phase error in 4.5 GHz bandwidth. The chip size is 2150 μm × 1040 μm including the bondpads. These performance parameters are comparable with the state of the art using similar technology. |
| Starting Page | 257 |
| Ending Page | 260 |
| File Size | 1137952 |
| Page Count | 4 |
| File Format | |
| ISBN | 9782874870361 |
| DOI | 10.1109/EuMIC.2014.6997841 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2014-10-06 |
| Publisher Place | Italy |
| Access Restriction | Subscribed |
| Rights Holder | European Microwave Association - EUMA |
| Subject Keyword | Distributed amplifiers BiCMOS phased arrays Phase shifters Bandwidth Switches Radar BiCMOS integrated circuits Transceivers Arrays Gain Silicon germanium |
| Content Type | Text |
| Resource Type | Article |
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