K-band CMOS low-noise amplifier with 180 & DEG; phase shift function using cascode structureopen access
- Authors
- Jang, Seongjin; Lee, Jaeyong; Park, Changkun
- Issue Date
- Aug-2023
- Publisher
- WILEY
- Keywords
- microwave amplifiers; microwave circuits; microwave phase shifters; microwave power amplifiers; microwave switches
- Citation
- ELECTRONICS LETTERS, v.59, no.15
- Journal Title
- ELECTRONICS LETTERS
- Volume
- 59
- Number
- 15
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/44215
- DOI
- 10.1049/ell2.12908
- ISSN
- 0013-5194
- Abstract
- In this study, a K-band CMOS low-noise amplifier (LNA) with a 180 & DEG; phase shift function is presented to reduce the chip area of the beamforming system. The proposed LNA is composed of three stages, and the last stage is designed with a differential cascode structure for 180 & DEG; phase shift function. The 180 & DEG; phase shift function was implemented by dividing one cascode transistor into two transistors. As a result, it is possible to equip the 180 & DEG; phase shift function without an additional chip area. The LNA was designed with a 65-nm CMOS process to verify the feasibility of the proposed technique. The core size was 0.66 x 0.41 mm(2). The measured phase difference between 0 & DEG; and 180 & DEG; phase shift modes was approximately 178 & DEG; in the operating frequency of 22.0 GHz. The measured noise figure and gain were 3.8 and 12.7 dB, respectively.
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