A 28-GHz CMOS LNA with Stability-Enhanced G<sub>m</sub>-Boosting Technique Using Transformers

Kong, Sunwoo; Lee, Hui-Dong; Jang, Seunghyun; Park, Jeehoon; Kim, Kwang-Seon; Lee, Kwang-Chun

doi:10.1109/rfic.2019.8701753

Cited by 39 publications

(10 citation statements)

References 7 publications

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“…In comparison with simulation and measurement results shown in Figure 4A, the differences of S-parameter between them are modest. Additionally, the maximum gain occurs at 24.5 GHz of 22.2 dB with the TMTT'20 17 RFIC'19 18 MWCL'19 19 MWCL'18 20 This study…”

Section: Application In Low-noise Amplifiermentioning

confidence: 75%

“…By inspection, due to the complexity of the Y-parameter, the capacitive coupling can be approximately obtained as Equation (17). And according to the reported work, 6 oxide capacitance C oxi and substrate capacitance C subi can be derived as Equations (18) and (19) where ω L and ω H represent low frequency and high frequency, respectively. Thus, Z ii can be described as Equation (20) where n represents the number of adjacent inductors and Y subi is the aggregation of substrate shunt branches.…”

Section: Model Analysis and Extractionmentioning

confidence: 94%

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On‐chip multiple‐coupled inductors modeling on silicon for millimeter‐wave applications

Wang

Lan²,

Xiong

et al. 2022

Micro & Optical Tech Letters

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This study proposes an improved broadband equivalent circuit model for millimeter‐wave and illustrates that the real part of the Z‐parameter (like Z21, Z31, and Z41) cannot be neglected. This improved model contains multiple‐coupled inductors on silicon with effective substrate current loops. And it is fabricated and measured in four‐port and in two‐port on the basis of 0.18 μm and 40 nm CMOS technology, respectively. Moreover, this proposed model is applied to a 22–31 GHz three common‐source stages differential gm‐boost low‐noise amplifier for 5G communication in 65 nm CMOS process. According to the measurement, the minimum noise figure is 2.5 dB at 23 GHz and the maximum gain is 22.2 dB at 24.5 GHz. The chip size is 0.5 mm × 0.92 mm with all pads.

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Section: Application In Low-noise Amplifiermentioning

confidence: 75%

Section: Model Analysis and Extractionmentioning

confidence: 94%

On‐chip multiple‐coupled inductors modeling on silicon for millimeter‐wave applications

Wang

Lan²,

Xiong

et al. 2022

Micro & Optical Tech Letters

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“…This FOM covers the critical parameters for evaluation of an LNA for low power and NF, high gain, and wide‐bandwidth applications. Table 2 is a summary of the implemented 22.3 ~ 32 GHz CMOS LNA, and recently published remarkable CMOS LNAs with operation frequency around 24 GHz 13‐17 . Clearly, our LNA exhibits comparable gain and IP 1dB , the lowest NF and P DC , and the highest FOM.…”

Section: A 24 Ghz Cmos Lnamentioning

confidence: 91%

“…A figure‐of‐merit (FOM) suitable for performance evaluation of radio‐frequency LNAs is given by Reference 14:

FOM ((), GHz / mW) = \frac{S_{21} ((), 1) \cdot BW ((), GHz)}{((), normalF - 1) ((), 1) \cdot P_{DC} ((), mW)},

where S 21 1 presents the power gain in magnitude, BW (GHz) is f 3dB in GHz, (F‐1) 1 is the excess noise factor in magnitude, and P DC (mW) refers to the power dissipation in mW. This FOM covers the critical parameters for evaluation of an LNA for low power and NF, high gain, and wide‐bandwidth applications.…”

Section: A 24 Ghz Cmos Lnamentioning

confidence: 99%

“…Then the Doppler frequency‐shift and time difference (between the received and the transmitted signals) are analyzed by the digital signal processing (DSP) module for estimation of the WL and flow velocity. The 24‐GHz‐band LNA with low‐power dissipation of 9.6 mW, high gain of 15 dB, and low noise figure (NF) of 3.1 dB is designed and implemented in a cost‐effective 0.18 μm CMOS technology 14‐18 . The LNA is beneficial for sensitivity enhancement of the Doppler radar.…”

Section: Introductionmentioning

confidence: 99%

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A 24 GHz hydrology radar system capable of wide‐range surface velocity detection for water resource management applications

Lin

Chiu

Chang³

2020

Micro & Optical Tech Letters

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We demonstrate a 24 GHz hydrology radar system. The continuous‐wave Doppler radar is capable of noncontact and wide‐range surface‐flow velocity detection in various scenarios. The radar receives the reflected echo signal through a directional narrow‐beam antenna. After amplification and demodulation by the proposed low‐noise amplifier and the subharmonic down‐conversion mixer, respectively, the Doppler frequency‐shift is analyzed by the digital signal processing (DSP) module for estimation of the water flow velocity. Moreover, for water level detection, a phase‐locked loop with micro control unit (MCU)‐controlled division ratio is included in the RF module for generating a stable and tunable (or frequency modulation) 24‐GHz‐band transmitting signal with low phase noise. To verify the radar system, outdoor field tests have been conducted. The measured results are consistent with the theoretical values, and the results of both the float method and the commercial handheld (Stalker Pro II) surface velocity radar. In the condition of water ripple lower than 3 cm, the radar functions well for flow speed range of 0.3 ~ 34.6 m/s. Overall, the hydrology radar is suitable for surface‐flow velocity detection (especially in bad weather) and water resource management (such as water‐level detection).

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A fusion bandwidth extension technique for broadband low‐noise amplifier

Wang

Lai³

2023

Circuit Theory & Apps

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SummaryWideband low‐noise amplifiers (LNAs) are widely used in 5G and 6G communication systems. This paper first analyzes two common bandwidth extension technologies: the stagger tuning technique and the magnetically coupled resonators (MCR) technique. Then, a four‐stage LNA based on double‐tuned transformer combined with stagger tuning idea and MCR idea was proposed. In order to improve the broadband characteristics of the LNA, the loose coupling double‐tuned transformer is carefully designed. Compared with the traditional stagger tuning LNA, it has better broadband characteristics, lower element error sensitivity, and lower design complexity. This designs a gain bandwidth product of 1.48 T with a −3‐dB bandwidth in 9.11 GHz and the noise factor is lower than 3 dB, which covers more than 45% −3‐dB fractional bandwidth. The LNA consumes 37‐mW power with a 1.1‐V supply and occupies 1.22 × 0.4 mm2.

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A 28-GHz CMOS LNA with Stability-Enhanced G_m-Boosting Technique Using Transformers

Cited by 39 publications

References 7 publications

On‐chip multiple‐coupled inductors modeling on silicon for millimeter‐wave applications

On‐chip multiple‐coupled inductors modeling on silicon for millimeter‐wave applications

A 24 GHz hydrology radar system capable of wide‐range surface velocity detection for water resource management applications

A fusion bandwidth extension technique for broadband low‐noise amplifier

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A 28-GHz CMOS LNA with Stability-Enhanced Gm-Boosting Technique Using Transformers

Cited by 39 publications

References 7 publications

On‐chip multiple‐coupled inductors modeling on silicon for millimeter‐wave applications

On‐chip multiple‐coupled inductors modeling on silicon for millimeter‐wave applications

A 24 GHz hydrology radar system capable of wide‐range surface velocity detection for water resource management applications

A fusion bandwidth extension technique for broadband low‐noise amplifier

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Product

Resources

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A 28-GHz CMOS LNA with Stability-Enhanced G_m-Boosting Technique Using Transformers