300-GHz-Band OFDM Video Transmission with CMOS TX/RX Modules and 40dBi Cassegrain Antenna toward 6G

Morishita, Yohei; Lee, Sangyeop; Teraoka, Toshihiro; Dong, Ruibing; Kashino, Yuichi; Asano, Hiroyuki; Hara, Shinsuke; Takano, Kyoya; Katayama, Kosuke; Sakamoto, Takenori; Shirakata, Naganori; Takinami, Koji; Takahashi, Koichi; Kasamatsu, Akifumi; Yoshida, Takeshi; Amakawa, Shuhei; Fujishima, Minoru

doi:10.1587/transele.2021mmp0005

Cited by 5 publications

(3 citation statements)

References 24 publications

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“…However, there clearly is room for improvement, and the results presented herein by no means represent what can be achieved by CMOS technology and WR-3.4 interface. The distance could possibly be made longer even with the present RX using the Cassegrain antennas used in [28].…”

Section: Discussionmentioning

confidence: 99%

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A 76-Gbit/s 265-GHz CMOS Receiver With WR-3.4 Waveguide Interface

Hara

Dong

Lee

et al. 2022

IEEE J. Solid-State Circuits

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A 76-Gbit/s 265-GHz CMOS receiver (RX) modularized with a WR-3.4 waveguide interface is presented. It is a mixer-first RX fabricated using a 40-nm CMOS technology. The primary design focus is simplicity and the resulting low noise and loss and high conversion gain (CG). To allow for both on-wafer and packaged measurements, ON-chip transmission lines are designed such that their characteristics are relatively insensitive to the presence or absence of adhesive covering the chip. The RX chip is flip-chip-mounted on a multilayer printed circuit board (PCB). Built into the PCB is a waveguide transition using double-resonant stacked patches for wideband operation. The CMOS RX module achieves the highest wireless data rate of 76 Gbit/s with 16 QAM, which is comparable to 80 Gbit/s reported previously for a CMOS RX with on-wafer probing measurement.

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Section: Discussionmentioning

confidence: 99%

“…2(b)]. Research and development of the 300-GHz-band transmitter (TX) and receiver (RX) circuits have been very active in recent years [7]- [28].…”

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confidence: 99%

A 76-Gbit/s 265-GHz CMOS Receiver With WR-3.4 Waveguide Interface

Hara

Dong

Lee

et al. 2022

IEEE J. Solid-State Circuits

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“…In most of the recent sub-terahertz (THz) CMOS transceiver (TRX) implementations, high-gain horn or parabolic antennas [36]- [39], lens antennas [40], and a combination of both horn and lens antennas [41] are used to overcome the large path loss, but the radiation is only toward a single direction. The phased-array implementation commonly used in millimeter-wave systems is the most suitable solution to this issue as it enables beam steering and boosts the antenna gain.…”

Section: Introductionmentioning

confidence: 99%

A Bi-Directional 300-GHz-Band Phased-Array Transceiver in 65-nm CMOS With Outphasing Transmitting Mode and LO Emission Cancellation

Abdo

Gomez

Wang

et al. 2022

IEEE J. Solid-State Circuits

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This article introduces a four-element 300-GHzband bi-directional phased-array transceiver (TRX). The TRX utilizes the same antenna, signal path, and local oscillator (LO) circuitry to operate either in transmitter (TX) mode or receiver (RX) mode. The TX mode adopts the outphasing technique to increase the average output power for higher order modulation schemes by utilizing the two mixers that are connected directly to the antenna in a mixer-last fashion. The two signal paths also enable the canceling of the LO feed-through (LOFT). The RX mode also benefits from the LOFT cancellation technique to suppress the LO emission, which is a common issue of the mixer-first RXs. The RX has a separate Hartley operation mode to reject the image signal coming from the TX. The TRX chip was implemented using CMOS 65-nm process, and a four-element phased array was implemented by stacking liquid crystal polymer (LCP) flexible printed circuit boards (PCBs). The stacked structure provides the required narrow antenna pitch at the 300-GHz band. The measured beam angle range is from Manuscript

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