Design of Full-Duplex Millimeter-wave Self-interference Cancellation Circuit
| Autor: | Lin, Hao-Ting, 林浩廷 |
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| Rok vydání: | 2019 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 107 As the evolution of 5th generation mobile network, the techniques of phased array beamforming and full-duplexing are critical to fulfill high-speed wireless transmission in millimeter-wave. In this thesis, a proposed 5-bit switched-type phase shifter and full-duplexer receiver front end with self-interference canceller are implemented in TSMC 90 nm process. The architecture of a high order pi-type low-pass filter with switches is adopted for miniaturizing design of phase shifter. The measurement results show the return loss above 10 dB, the rms phase error of 8.2 degree, and the insertion loss of 13 to 23 dB at the operating frequency of 36 GHz. To identify the signal between transmitter and receiver of full-duplex system, an electrical balanced transformer is proposed which can handle the common-mode and differential-mode signal. Additional active self-interference canceller is designed for further suppressing the leakage signal. From the simulation, the isolation is improved from 32 dB to 56 dB at 39 GHz. For system integration, wire-bonding transition is designed for interconnect between the chip and carrier with well impedance matching and low loss characteristic. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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