Design Technique of K-Band CMOS Phase Shifter with L-C-L T-Type Low Pass Structureopen access
- Authors
- Jang, Seongjin; Kim, Choul-Young; Park, Changkun
- Issue Date
- Sep-2023
- Publisher
- MDPI
- Keywords
- CMOS; gain error; phase error; phase shifter
- Citation
- ELECTRONICS, v.12, no.17
- Journal Title
- ELECTRONICS
- Volume
- 12
- Number
- 17
- URI
- https://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/49190
- DOI
- 10.3390/electronics12173678
- ISSN
- 2079-9292
2079-9292
- Abstract
- In this study, we designed a 5-bit K-band CMOS switch type phase shifter. In order to minimize phase and gain errors, a design technique for bits constituting the phase shifter was proposed. The proposed design technique has been achieved by adjusting the resonant frequencies of inductance and capacitance in the L-C-L T-type low pass filter structure. Through this, a method of optimizing the phase shifter with the T-type low pass filter structure was presented. The K-band 5-bit phase shifter was designed with a 65 nm CMOS process to verify the feasibility of the proposed design technique. The core size was 0.78 x 0.21 mm(2). At the frequency ranges of 22.0 to 23.0 GHz, the insertion loss and RMS phase and gain errors were measured to be 7.44 +/- 2.0 dB, 2.6(degrees) and 1.2 dB, respectively.
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