A 77-GHz FMCW Radar System Using On-Chip Waveguide Feeders in 65-nm CMOS

Cui, Chenglin; Kim, Seong-Kyun; Song, Reem; Song, Junesol; Nam, Sangwook; Kim, Byung‐Sung

doi:10.1109/tmtt.2015.2477343

Cited by 35 publications

(20 citation statements)

References 18 publications

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“…도파관은 W-밴 드용 WR-10 규격을 사용하였으며, 송․수신기 도파관 입 구에 자체 제작한 칩을 부착했다. 칩에 대한 자세한 설명 은 참고문헌 [5], [6]에 있다. 송․수신기 칩은 on-chip 도파 관 급전기를 내장하여 77 GHz 대역의 입․출력 신호를 급전기를 통해 도파관으로 전달하고, 전달된 출력 신호는 고이득의 혼 안테나를 통하여 방사된다.…”

Section: ⅱ 송․수신기 모듈 구성도unclassified

W-Band Radar Altimeter for Drones

Lee¹,

Lee²,

Kim³

et al. 2019

J. Korean Inst. Electromagn. Eng. Sci.

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In this study, we propose a W-band frequency modulated continuous wave(FMCW) radar altimeter that can measure the altitude based on the frequency differences of transmitted and received signals. This W-band FMCW system is powered by an altitude control algorithm, which we propose to help prevent collisions of drones with obstacles in real deployment by measuring the relative altitude. It is shown that this algorithm enables the drone to be positioned within a 3 % error of altitude from the desired input height. The chip used in the W-band transmitter and receiver was fabricated using a 65-nm CMOS process, and a horn antenna was directly fed by incorporating an embedded waveguide feeder into the chip [1]. The clutter spectra observed in terrains including soil, grass, and calm lake water were measured and compared, confirming the reflectivity characteristics of various surfaces of different water contents.

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Section: ⅱ 송․수신기 모듈 구성도unclassified

W-Band Radar Altimeter for Drones

Lee¹,

Lee²,

Kim³

et al. 2019

J. Korean Inst. Electromagn. Eng. Sci.

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“…Their architectures are shown in Fig. 1, similar to those of the previous works [5], [9]. However, all circuit blocks, including an low noise amplifier (LNA), power amplifier (PA), and frequency multiplier, have been newly designed for a wide bandwidth of 5 GHz.…”

Section: Circuit Designmentioning

confidence: 86%

“…17. As discussed in [9], Tx and Rx chips are thinned to 50 µm to lower substrate losses. They are mounted on the top surface of the L1 layer aligned with slots, which are formed on the ground plane of the center patch of the series array.…”

Section: Packaging and Integration Of Multi-channel Radar Systemmentioning

confidence: 99%

79 GHz Active Array FMCW Radar System on Low-Cost FR-4 Substrates

Kim

Shin

et al. 2020

IEEE Access

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This work, for the first time to our best knowledge, presents a W-band multi-channel frequency-modulated continuous-wave (FMCW) radar system on low-cost FR-4 substrates. A center-fed patch array antenna on an FR-4 substrate can achieve a maximum gain of 10.8 dBi. It is enabled by aperture coupled feeding using an on-chip feeder implemented on a CMOS radar transmitter (Tx) and receiver (Rx). The proposed radar system consists of one Tx and four Rx channels placed in the back cavity of a microstrip array antenna like an active array antenna system. Additionally, Tx and Rx chipsets include a wideband frequency multiplier with high multiplication ratio of 63, making it easy to distribute reference FMCW waveform synthesized at a very low frequency about 1.25 GHz for 79 GHz output using direct digital synthesis (DDS). Extending the number of channels and implementing various waveforms can be easily accomplished with very good phase noise. The functionality of the proposed radar system on low-cost substrates is confirmed by distance and angle measurements.

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“…본 연구에 쓰인 레이다는 77 GHz 단일채널 FMCW 방 식의 자체 제작한 시스템이다 [3] . 송수신 안테나는 130˚의 방위각으로 좌우로 넓게 볼 수 있는 1×16 슬롯 어레이 안 테나를 사용하였다 [4] .…”

Section: ⅲ 시스템 구성 및 측정 결과unclassified