A 433-MHz SOI CMOS Automatic Impedance Matching Circuit

Foucauld, Emeric de; Severino, Raffaele; Nicolas, Dominique; Giry, A.; Delaveaud, Christophe

doi:10.1109/tcsii.2018.2834158

Cited by 9 publications

(10 citation statements)

References 12 publications

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“…3. Similar detection techniques based on the same principle can also be found in [19] and [22]. The complex ratio V 1 /V 2 of the two terminal voltages of the sensing element (capacitor, C sen ) is a function of the antenna load impedance.…”

Section: Active Load Impedance and Sensing Techniquesmentioning

confidence: 86%

“…To address this issue, several techniques have been proposed at low RFs. In, [19], [20], and [22], the two RF input signals are multiplied with a reference signal, respectively, by using two mixers. This not only increases circuit complexity but fails to remove completely the amplitude influence.…”

Section: Complex Voltage Sensing For Mm-wave Applications-architectur...mentioning

confidence: 99%

See 1 more Smart Citation

A Low-Power Reflection-Coefficient Sensor for 28-GHz Beamforming Transmitters in 22-nm FD-SOI CMOS

Zhang

Mangraviti

Nguyen

et al. 2021

IEEE J. Solid-State Circuits

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Active load impedance variations in a phased array transmitter cause significant power amplifier (PA) performance degradation, in terms of output power, linearity, and power-added efficiency, which are key parameters to enable high-speed data throughputs using spectrally efficient modulation schemes. The system performance can be restored by using PAs having active or passive reconfigurability with the help of antenna impedance sensors. This article presents a low-power reflection-coefficient sensor for 5G millimeter-wave phased-array applications. The complex load impedance of the PA is determined based on the complex voltage over a sensing element, which can be integrated and co-designed with the PA output matching network, with minimal loss (<0.2 dB) and a negligible area penalty. A full-range phase detector with improved detection resolution is proposed, enabling an amplitude-insensitive phase detection. Fabricated in a 22 nm FD-SOI process, the sensor prototype occupies a silicon area of 0.024 mm 2 and consumes 13.2 mW power. The sensor demonstrates a wide detection range with || up to 0.7 (VSWR 5.67) in a load-pull test at 28 GHz. From circle of 0.2 up to 0.7, the maximum detection errors in the magnitude and phase of the are 0.14 • and 40 • , respectively.

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Section: Active Load Impedance and Sensing Techniquesmentioning

confidence: 86%

Section: Complex Voltage Sensing For Mm-wave Applications-architectur...mentioning

confidence: 99%

A Low-Power Reflection-Coefficient Sensor for 28-GHz Beamforming Transmitters in 22-nm FD-SOI CMOS

Zhang

Mangraviti

Nguyen

et al. 2021

IEEE J. Solid-State Circuits

View full text Add to dashboard Cite

show abstract

“…19 is low. Excluding the micro-controller it is less than 1% of the PA power consumption and around 15 % of die area [37], and including the microcontroller it would be around 2% of the PA power consumption.…”

Section: B Mismatched Loadsmentioning

confidence: 99%

A 2.4 GHz CMOS Class-F Power Amplifier With Reconfigurable Load-Impedance Matching

Gilasgar¹,

Barlabé

Pradell

2019

IEEE Trans. Circuits Syst. I

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A novel reconfigurable CMOS class-F power amplifier (PA) at 2.4 GHz is proposed in this paper. It is able to match the output load variations mainly due to the effect of hand and head on a mobile phone. The effect of load variation on PAE, output power and distortion is compensated by reconfiguring the output network using an impedance tuner. The tuner controls the output matching at fundamental frequency without affecting the class-F harmonic tuning up to 3 rd harmonic. To the authors' knowledge, this is the first design of a CMOS class-F PA addressed to compensate the effect of load variation. Measurement results for 50 load impedance show a maximum PAE of 26%, and maximum output power of 19.2 dBm. The measured total harmonic distortion is 4.9%. Measurement results for load values other than 50  show that PAE increases from 6.5% (not-tuned PA) up to 19.9% (tuned PA) with the same output power (19.2 dBm). Tuning also reduces the ACLR by 5 dB and the spectral regrowth of a WiFi signal at the PA output. The size of the fabricated chip is 1.6 mm × 1.6 mm.

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“…If a broadband antenna is connected to a load port, the AIMS can tune and provide RF impedances that meet predefined conditions. A similar concept has been used as automatic tuning architectures in radar and wireless communication systems [9][10][11][12][13][14][15][16][17][18]. The testing and validation system of the broadband adaptive impedance matching applications is implemented and described in detail here.…”

Section: Introductionmentioning

confidence: 99%

Testing and Validation of Adaptive Impedance Matching System for Broadband Antenna

2019

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Broad RF impedance matching is challenging; however, the need for broadband matching is found frequently in modern RF and wireless systems with multiple wireless standards. Moreover, in 5G technology, multiple frequency bands are used, and these systems typically employ a broadband antenna or multiple antennas. Antenna impedances vary from design targets for many reasons including manufacturing process variations or antenna environment changes. An adaptive impedance matching system (AIMS) for testing and validation is introduced, and its implementation is shown in this paper. The AIMS can control impedance matching tuner settings to provide an arbitrary impedance frequency-varying load that meets user-defined conditions. This AIMS provides a testing and validation system for broadband antennas that can be characterized by various settings of the impedance matching tuner. As a device under test (DUT), a three-stub reconfigurable filter was used as the impedance matching tuner on a RT/Duroid 6010 RF board. It was integrated with a control circuit board. This AIMS implementation also included an antenna impedance tuner that can vary the distance between the antenna and the ground plane. This model represents practical antenna impedance variations. The AIMS controls a network analyzer and the impendence matching tuner. The adaptive control program on a PC was developed to perform an effective two-pass tuning strategy. This article presents the successful automated tuned results and their numerical evaluations of three cases that were generated by the antenna impedance tuner.

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A 433-MHz SOI CMOS Automatic Impedance Matching Circuit

Cited by 9 publications

References 12 publications

A Low-Power Reflection-Coefficient Sensor for 28-GHz Beamforming Transmitters in 22-nm FD-SOI CMOS

A Low-Power Reflection-Coefficient Sensor for 28-GHz Beamforming Transmitters in 22-nm FD-SOI CMOS

A 2.4 GHz CMOS Class-F Power Amplifier With Reconfigurable Load-Impedance Matching

Testing and Validation of Adaptive Impedance Matching System for Broadband Antenna

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