18.2 Highly-linear integrated magnetic-free circulator-receiver for full-duplex wireless

Reiskarimian, Negar; Dastjerdi, Mahmood Baraani; Zhou, Jin; Krishnaswamy, Harish

doi:10.1109/isscc.2017.7870388

Cited by 69 publications

(16 citation statements)

References 3 publications

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“…If the output of the filter is taken directly from the baseband capacitors, i.e. without upconverting the downconverted signal back to RF, a receiver with integrated front-end filtering may also be realized [2], [4], [15]- [20].…”

Section: Synthesis Methodology Of Higher-order N-path Filtersmentioning

confidence: 99%

Design Methodology of N-Path Filters With Adjustable Frequency, Bandwidth, and Filter Shape

Hasan

Saeedi

et al. 2018

IEEE Trans. Microwave Theory Techn.

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Abstract-In this paper, an adaptive N-path filter design technique is presented. The filter designed by this method can be reconfigured to different shapes, e.g. Butterworth or Chebyshev with variable bandwidth, based on the user requirements. In addition, an analytical synthesis procedure is introduced to realize high-order bandpass filters based on N-path architecture with a prescribed set of specifications. A proof-of-concept bandpass filter is fabricated and measured in a 65-nm CMOS process. The filter can be reconfigured to realize different filter shapes by changing coupling capacitors. The bandwidth of the proposed filter is also tunable. The passband of the filter is tunable from 0.2 GHz to 1.2 GHz with a gain of 14.5-18 dB, a noise figure of 3.7-5.5 dB, and a total power consumption of 37.5-52.7 mW. The channel bandwidth can be varied from 20 MHz to 40 MHz and the filter out-of-band IIP3 (∆f =50 MHz) is 25 dBm.

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Section: Synthesis Methodology Of Higher-order N-path Filtersmentioning

confidence: 99%

Design Methodology of N-Path Filters With Adjustable Frequency, Bandwidth, and Filter Shape

Hasan

Saeedi

et al. 2018

IEEE Trans. Microwave Theory Techn.

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“…Furthermore, the N-path filter in the circulator can be repurposed as a down-converting mixer, directly providing the baseband received signals on the N-path filter capacitors. More details about this work can be find in [31].…”

Section: Conductivity-modulation-basedmentioning

confidence: 99%

“…In this letter, we will cover our recent research on using commutated circuits to break reciprocity and build high- [30], [31]. (b) Millimeter-wave switched-transmission-line circulator [32], [33].…”

Section: Introductionmentioning

confidence: 99%

Integrated Conductivity-Modulation-Based RF Magnetic-Free Nonreciprocal Components: Recent Results and Benchmarking

Reiskarimian

Nagulu

Dinç

et al. 2018

Antennas Wirel. Propag. Lett.

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Achieving non-reciprocity and building nonreciprocal components through spatio-temporal modulation of material properties has attracted a lot of attention in the recent past as an alternative to the more traditional approach of exploiting Faraday rotation in magnetic materials. In this letter, we review recent research on spatio-temporal conductivity-modulation, which enables low-loss, small-footprint, wide-bandwidth and high-power-handling non-reciprocal components operating from radio frequencies (RF) to millimeter-waves (mm-waves) and integrated in a CMOS platform. Four generations of non-reciprocal circulators and circulator-based systems will be reviewed. We will also discuss metrics of performance that are important for wireless applications and standards, and introduce a new antenna (ANT) interface efficiency figure of merit (ηANT ) to enable a fair comparison between various types of antenna interfaces.

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“…Digital SIC has also been implemented in Matlab after capturing the BB signals using an oscilloscope to achieve an overall 85dB self-interference suppression across the FD receiver. More recent advances include a combined circulator-receiver for full duplex that combines the circulator with down-conversion functionality [16], enabling higher transmitter power handling, lower power consumption and better noise performance, and an extension of the circulator to millimeter-waves (28GHz) [17].…”

Section: Application Of N-path Filters To Integrated Non-magnetic Nonmentioning

confidence: 99%

Linear Periodically Time-Varying (LPTV) Circuits Enable New Radio Architectures for Emerging Wireless Communication Paradigms

Reiskarimian

Zhang

Krishnaswamy

2017

Proceedings of the 54th Annual Design Automation Conference 2017

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The next generation of cellular wireless communication networks (the much hyped "5G") is targeting a 1000x increase in data capacity. This has sparked an investigation of new and transformative wireless communication paradigms, including massive MIMO, full duplex and millimeter-wave wireless. These new wireless paradigms place requirements on the radio circuitry that are orders of magnitude more challenging than traditional systems, forcing us to rethink conventional radio design. Conventional analog and radio frequency circuit design has relied on linear, time-invariant (LTI) components and circuits. However, LTI components and circuits are restricted in the signal processing functionalities that can be implemented. Recently, there has been significant interest in linear, periodically time varying (LPTV) circuits that can enable new functionalities and components, such as highly-tunable, high quality integrated filters, front-ends with spatio-spectral filtering capability and integrated non-magnetic non-reciprocal components such as circulators and isolators. This paper reviews recent research breakthroughs in LPTV circuits and systems that enable full-duplex and massive MIMO wireless. CCS CONCEPTS • Hardware → Wireless devices; Radio frequency and wireless circuits; 1

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18.2 Highly-linear integrated magnetic-free circulator-receiver for full-duplex wireless

Cited by 69 publications

References 3 publications

Design Methodology of N-Path Filters With Adjustable Frequency, Bandwidth, and Filter Shape

Design Methodology of N-Path Filters With Adjustable Frequency, Bandwidth, and Filter Shape

Integrated Conductivity-Modulation-Based RF Magnetic-Free Nonreciprocal Components: Recent Results and Benchmarking

Linear Periodically Time-Varying (LPTV) Circuits Enable New Radio Architectures for Emerging Wireless Communication Paradigms

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