| 研究課題/領域番号 |
21K14206
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| 研究機関 | 東京工業大学 |
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研究代表者 |
Pang Jian 東京工業大学, 工学院, 特任助教 (00897001)
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| 研究期間 (年度) |
2021-04-01 – 2023-03-31
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| キーワード | Millimeter-wave / Phased-array / CMOS / Transceiver / Distributed array |
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| 研究実績の概要 |
During the past year, the circuit-level research has been conducted for the distributed phased-array. High-performance phased-array transceiver components have been designed regarding the required system performance.
A phased-array element transmitter has been designed with CMOS technology. The designed circuit including a power amplifier, a variable gain amplifier, a phase shifter and an RF buffer. Over 15dBm saturated output power is maintained by the transmitter. It also covers over 8-dB variable gain range and 360-degree phase shifting. This work is published in 2021 IEICE society conference.
Also, the distributed phased-array requires alignment on the phase between different elements. Therefore, reference signal generation circuit is required in this case. An injection-locked-frequency-divider is designed to generate the reference signal from the RF signal. The designed block can be injection locked with over 20% locking range with 6mW power consumption at 39GHz band. This work is published in 2022 IEEE International Conference on Integrated Circuit Technologies and Applications.
Other researches are still under performing about realizing high-performance phase shifters, LNAs, and TRX switches.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
3: やや遅れている
理由
The research progress is almost as expected regarding the design of high-performance transceiver components. While, for the design of synchronization circuits, the research progress is delayed. The main reason for this delay is due to the issue that how to realize positioning between different phased-array modules within a reasonable delay. The required positioning resolution is also another issue for this research, which must be derived from specific design scenario.
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| 今後の研究の推進方策 |
The future plan for this research will be as follows. The research and design progress for the positioning circuits should be accelerated first. The requirements, such as the resolution will be researched first. To satisfy the requirement for such positioning technology, one possible solution will be the frequency diverse array. One-shot positioning could be realized within very short time.
The system design consideration and implementation will be started after the circuit design. The phased-array module design and consideration will be done afterward.
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| 次年度使用額が生じた理由 |
Due to the research and design delay of the positioning circuits, part of the amount is not used in the past year. In this year, the positioning circuits will be designed and implemented. Part of the funding will be used for the implementation of the designed circuits in this year. Also, part of the funding will be purchased for building the evaluation system for designed circuits.
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