An Energy-Efficient 10-Gb/s CMOS Millimeter-Wave Transceiver With Direct-Modulation Digital Transmitter and I/Q Phase-Coupled Frequency Synthesizer

Deng, Wei; Zheng, Sifa; Ma, Ruichang; Lin, Jianfu; Li, Yutian; Ye, Jialiang; Kong, Shangcheng; Hu, Sanming; Jia, Haikun; Chi, Baoyong

doi:10.1109/jssc.2020.2978022

Cited by 27 publications

(4 citation statements)

References 43 publications

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“…Operating oscillators at 2× frequency followed by a ÷2 divider is a suitable solution but only in the sub-6-GHz bands since doubling the operating frequency in mm-wave oscillators worsens the PN significantly [14], [15], [16]. Recently, a PPF seems to be a promising scheme for mm-wave I/Q generation [17], [18], [19], [20] since it would barely degrade the LO's PN. Nevertheless, a real-time I/Q calibration circuit [17] is required to maintain its I/Q accuracy against process, voltage, and temperature (PVT) variations.…”

Section: Table I Specifications Of Irr and Its Corresponding Evmmentioning

confidence: 99%

A 30-GHz Class-F Quadrature DCO Using Phase Shifts Between Drain–Gate–Source for Low Flicker Phase Noise and I/Q Exactness

Chen

Siriburanon

et al. 2023

IEEE J. Solid-State Circuits

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In this article, we present a low phase noise (PN) mm-wave quadrature digitally controlled oscillator (DCO) exploiting transformers for class-F operation and harmonic extraction. A third transformer coil is added for the inter-core coupling with the source terminals of the switching transistors. We identify that the inter-core coupling in quadrature oscillators causes an asymmetric flicker noise current, thus degrading flicker PN. As a remedy, we propose a deliberate drain-to-gate phase shift of the switching transistors by means of capacitive loading to fix this asymmetry. The ±90 • I/Q mode ambiguity is also resolved by introducing another phase shift in the source-coupling; it is explained by a simplified analysis with phasor diagrams. Fabricated in the TSMC 28-nm LP CMOS, the prototype achieves PN of −112 dBc/Hz and figure-of-merit (FoM) of −185 dB at 1-MHz offset of 25.7 GHz. The measured flicker PN corner is 140-250 kHz and image rejection ratio (IRR) >47 dB over the whole 18% tuning range (TR). To the best of the authors' knowledge, it is the best reported PN and IRR for a mm-wave quadrature oscillator.

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Section: Table I Specifications Of Irr and Its Corresponding Evmmentioning

confidence: 99%

A 30-GHz Class-F Quadrature DCO Using Phase Shifts Between Drain–Gate–Source for Low Flicker Phase Noise and I/Q Exactness

Chen

Siriburanon

et al. 2023

IEEE J. Solid-State Circuits

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“…9 illustrates the topology of the proposed hybrid π-network phase shifter with four Gm stages. To improve noise performance and bandwidth, the 3-coil transformer is used for the input matching [39], [40]. The inter-stage matching and output matching are implemented by compact transformers.…”

Section: Circuits Implementation a Hybrid π -Network Phase Shiftermentioning

confidence: 99%

Analysis and Design of a 35-GHz Hybrid π-Network High-Gain Phase Shifter With 360° Continuous Phase Shifting

Wei

Ding

et al. 2021

IEEE Access

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This paper presents the analysis and design of a 35-GHz high-gain phase shifter with 360 • continuous phase shifting. To enhance the phase shift range, a hybrid π-network realized by combining the electrical tuning through capacitors and magnetic tuning through transformers is developed. The phase shift modules are inserted between the vertically stacking transistors to achieve the embedded phase shifting with the minimum loss. Furthermore, the Gm stages offer additional signal gain to suppress attenuation in the passive phase shifter. The capacitive neutralization technique is utilized to further increase the gain and enhance stability. This prototype, fabricated in a 28-nm CMOS process, demonstrates a 360 • continuous phase shift with a maximum gain of 25.6 dB and a minimum noise figure of 4.1 dB. It consumes 26-mW power with a supply voltage of 0.9 V and 1.25 mm × 0.75 mm chip area.

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“…So far, millimeter wave (mm-wave) frequencies have shown promising potential for several applications. Multi-Gb/s wireless communications [2], meteorology radars, imaging systems [3], and short-range remote sensing [4] are some examples that can be enabled by mm-wave technologies. E-band frequencies in mm-wave can carry higher data traffic mainly due to the wider channels, making this frequency band a proper solution for future communications needs [5].…”

Section: Introductionmentioning

confidence: 99%

Fabrication Error Modeling and Analysis of an E-Band MHMIC Balanced Power Detector

Harifi-Mood,

Souzandeh,

PourMohammadi

et al. 2024

IEEE Access

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This study models and analyses the fabrication errors of an ultra-wideband (UWB) Schottky diode power detector using miniature hybrid-microwave integrated-circuit (MHMIC) technology. The fabricated balanced power detector is composed of two zero-bias GaAs Schottky diodes, a 90°-hybrid coupler, and two pairs of broadband butterfly open stub reflectors. The circuit is designed on a thin film ceramic substrate having a thickness of 127 µm with a 1 µm gold conductive layer, and a 20 nm Titanium Oxide (T iO 2 ) resistive layer. The simulations use a computer model of the broadband coupler from onwafer measurements to obtain an authentic fabrication error analysis. Moreover, the trade-off between the maximum efficiency and the fabrication error tolerance of the balanced power detectors is discussed. It is shown that the performance of the balanced power detector is dependent on different fabrication errors. Based on the measurement results, one of the fabricated detectors with minimum fabrication errors demonstrates a return loss of better than 10 dB over the entire frequency band of 60 to 90 GHz.INDEX TERMS Balanced power detector, error analysis, high data-rate, integrated circuit (IC), mm-Wave communication systems, zero bias Schottky diode.

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An Energy-Efficient 10-Gb/s CMOS Millimeter-Wave Transceiver With Direct-Modulation Digital Transmitter and I/Q Phase-Coupled Frequency Synthesizer

Cited by 27 publications

References 43 publications

A 30-GHz Class-F Quadrature DCO Using Phase Shifts Between Drain–Gate–Source for Low Flicker Phase Noise and I/Q Exactness

A 30-GHz Class-F Quadrature DCO Using Phase Shifts Between Drain–Gate–Source for Low Flicker Phase Noise and I/Q Exactness

Analysis and Design of a 35-GHz Hybrid π-Network High-Gain Phase Shifter With 360° Continuous Phase Shifting

Fabrication Error Modeling and Analysis of an E-Band MHMIC Balanced Power Detector

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