Analysis and Design of a CMOS Bidirectional Passive Vector-Modulated Phase Shifter

Gu, Peng; Zhao, Dixian; You, Xiaohu

doi:10.1109/tcsi.2020.3048816

Cited by 38 publications

(16 citation statements)

References 29 publications

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“…Note that there are numerous proposed architectures for phase-shifters and TTDs and thus a fair and comprehensive comparison of their hardware costs is beyond the scope of this paper. However, as a ball park, we also include a comparison of the power consumption, insertion loss, and on-chip area of some RF chain [45] 125 --Phase-shifter (Passive) [46], [47] state-of-the-art implementations of a phase-shifter, a TTD and an RF chain (which includes the mixer, amplifier, and digital-to-analog converter etc.) in Table 2.…”

Section: ) Fully-connected Structure (Hbf-fc)mentioning

confidence: 99%

Joint Phase-Time Arrays: A Paradigm for Frequency-Dependent Analog Beamforming in 6G

Ratnam

AlAmmouri

et al. 2022

IEEE Access

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Hybrid beamforming is an attractive solution to build cost-effective and energy-efficient transceivers for millimeter-wave and terahertz systems. However, conventional hybrid beamforming techniques rely on analog components that generate a frequency flat response such as phase-shifters and switches, which limits the flexibility of the achievable beam patterns. As a novel alternative, this paper proposes a new class of hybrid beamforming called Joint phase-time arrays (JPTA), that additionally use true-time delay elements in the analog beamforming to create frequency-dependent analog beams. Using as an example two important frequency-dependent beam behaviors, the numerous benefits of such flexibility are exemplified. Subsequently, the JPTA beamformer design problem to generate any desired beam behavior is formulated and near-optimal algorithms to the problem are proposed. Simulations show that the proposed algorithms can outperform heuristics solutions for JPTA beamformer update. Furthermore, it is shown that JPTA can achieve the two exemplified beam behaviors with one radio-frequency chain, while conventional hybrid beamforming requires the radio-frequency chains to scale with the number of antennas to achieve similar performance. Finally, a wide range of problems to further tap into the potential of JPTA are also listed as future directions.INDEX TERMS millimeter-wave, terahertz, true time delay, beamforming, JPTA, beyond 5G, 6G

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Section: ) Fully-connected Structure (Hbf-fc)mentioning

confidence: 99%

Joint Phase-Time Arrays: A Paradigm for Frequency-Dependent Analog Beamforming in 6G

Ratnam

AlAmmouri

et al. 2022

IEEE Access

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“…To obtain high resolution, the phase different between I+/I− and Q+/Q− is

9{0}^{\circ }

ideally for QG. It is not advisable to sacrifice the area of the QG in exchange for a high‐precision quadrature signal in phase array application 8,9 . Based on the conventional coupler in Figure 3A, a differential transformer‐based directional coupler is presented in Figure 3B.…”

Section: Circuit Design Of Psmentioning

confidence: 99%

“…Conventional passive PSs, such as reflection‐type PS (RTPS), 5 switched‐type PS (STPS) 6 and loaded line PS, 7 have feature of high linearity. Some passive PSs introduce couple‐line coupler as a quadrature generator (QG) 8,9 . Those QGs occupy larger areas to meet phase performance, which is unacceptable for large scale array‐size beamforming systems.…”

Section: Introductionmentioning

confidence: 99%

A compact 90–96 GHz 6‐bit passive vector modulator phase shifter in 28‐nm CMOS for phase array applications

Deng

Pan

Zhang³

et al. 2022

Micro & Optical Tech Letters

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This letter presents a 90-96 GHz 6-bit digital control passive vector modulator phase shifter (PS) in a 28-nm complementary metal-oxide-semiconductor for phase array application. In PS, a full differential directional coupler as a quadrature generator (QG) is proposed, which achieves wide bandwidth and a high-performance orthogonal network by introducing more pole-zero pairs. In the vector modulator, two 6-bit binary-weighted vector modulators, respectively scale the quadrature signal generated by QG to achieve a high-resolution vector phase. The measured PS cover ∘ 360 and the minimal root mean square (RMS) phase error is ∘ 0.7 and RMS gain error 0.3 dB at 93 GHz, respectively. The fabricated PS occupies 310 × 280 μm 2 excluding pads with no power consumption.

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“…• 矢量调制型数控无源移相器技术. 如图 5(b) 所示, 移相器电路 [20] 图 5 (a) 电流复用跨导增强型低噪声放大器 [18] ; (b) 矢量调制型数控无源移相器 [20] ; (c) 基于电容补偿的超宽带衰减器 [21] ; (d) 紧凑型功分器 [22] Figure 5 (a) Current-reuse and gm-boost LNA [18] ; (b) passive vector-modulated phase shifter [20] ; (c) ultra-broadband attenuator with capacitive compensation [21] ; (d) compact power divider based on multi-tap [22] 器用于实现通道的幅度调节 [21] ; 如图 5(c) 所示. 该衰减器由数字控制的 0.…”

Section: Cmos 毫米波芯片和相控阵天线设计挑战unclassified

Design and implementation of CMOS millimeter-wave ICs and 4096 TX/4096 RX very-large-scale integrated phased-array antenna

赵¹,

陈²,

尤³

2021

Sci. Sin.-Inf.

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Analysis and Design of a CMOS Bidirectional Passive Vector-Modulated Phase Shifter

Cited by 38 publications

References 29 publications

Joint Phase-Time Arrays: A Paradigm for Frequency-Dependent Analog Beamforming in 6G

Joint Phase-Time Arrays: A Paradigm for Frequency-Dependent Analog Beamforming in 6G

A compact 90–96 GHz 6‐bit passive vector modulator phase shifter in 28‐nm CMOS for phase array applications

Design and implementation of CMOS millimeter-wave ICs and 4096 TX/4096 RX very-large-scale integrated phased-array antenna

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