High-Quality-Factor Active Capacitors for Millimeter-Wave Applications

Ghadiri, Aliakbar; Moez, Kambiz

doi:10.1109/tmtt.2012.2221475

Cited by 12 publications

(2 citation statements)

References 21 publications

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“…In this field, CMOS-based devices [ 22 , 23 , 24 , 25 , 26 , 27 ] are also widely employed because of their high level of integration, mass production cost, and combination of RF devices, digital and analogue circuits. However, devices in this technology still consume a lot of power for millimetre-wave band applications.…”

Section: Introductionmentioning

confidence: 99%

Mechanically Reconfigurable Waveguide Filter Based on Glide Symmetry at Millimetre-Wave Bands

Tamayo‐Domínguez

Fernández-González

Quevedo–Teruel

2022

Sensors

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This paper presents the design and fabrication of a mechanically reconfigurable filter at W band based on the concept of glide symmetry. The tunability is achieved by breaking and regenerating the glide symmetry. The filters are made of two glide-symmetric pieces that can be displaced in a certain direction, and therefore, break the symmetry. The high filtering capacity of these designs is demonstrated by simulation and measurement and can also be adjusted mechanically. The transmission level in the manufactured filter varies from a value between −1 and −2 dB when the filter is in the glide symmetry position to values close to −40 dB in the stop-band when it is in the broken symmetry position. The transmission band obtained in the symmetrical mode is around 20%, but, after breaking the symmetry, it is split into two passbands of 6.5% and 11% separated by a stop-band of 6%. The position, bandwidth, filtering level and filter roll-off can be adjusted for both modes of operation by appropriately selecting the unit cell design parameters and the number of unit cells.

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Section: Introductionmentioning

confidence: 99%

Mechanically Reconfigurable Waveguide Filter Based on Glide Symmetry at Millimetre-Wave Bands

Tamayo‐Domínguez

Fernández-González

Quevedo–Teruel

2022

Sensors

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“…Active capacitor which provides negative input series resistance was introduced into active filter designs to compensate the loss of other components [96,97]. High Q active capacitor based on cross-coupled pair was reported in [98]. In proposed VCO, the special configuration of switchable coupled VCO-cores and alternative operation CHAPTER 5 92 of two cores not only provide dual-mode operation but also enable the utilization of active capacitor.…”

Section: High Q Active Capacitormentioning

confidence: 99%

Design of voltage-controlled oscillators and frequency dividers for 60 GHZ wireless communication applications

Zou¹

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Comprehensive review and study for the CMOS transformer tank voltage‐controlled oscillator

Mansour,

Mansour

2024

Circuit Theory & Apps

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This article comprehensively reviews and studies CMOS transformer tank voltage‐controlled oscillators (VCOs) designed to improve the frequency tuning range (FTR) and minimize phase noise (PN) across a broad frequency range, particularly for mm‐wave and fifth‐generation applications. The study focuses on enhancing the performance of the oscillators to meet the demanding requirements of these advanced applications. This study thoroughly investigates and compares various strategies to increase the FTR, minimize PN, and reduce power dissipation in transformer tank VCOs. The aim is to establish fundamental guidelines for implementing transformer‐based tank VCOs. The study comprehensively reviews and analyzes the overall architecture of transformer‐based tank VCOs, presenting a detailed examination of the methods employed to enhance VCO performance. Additionally, the study illustrates the impact of the coupling factor on the VCO's performance parameters, detailing and demonstrating the overall tank circuit quality factor (Q) and resonator coupling factor (κ). A thorough understanding of PN methodology and the limitations of FTR has led to the development of innovative architectures. These include transformer‐based capacitive feedback (FB) oscillators with resistively adjusted variable inductors, as well as class‐F and inverse class‐F VCOs. These novel architectures contribute significantly to the improvement of oscillator performance.

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High-Quality-Factor Active Capacitors for Millimeter-Wave Applications

Cited by 12 publications

References 21 publications

Mechanically Reconfigurable Waveguide Filter Based on Glide Symmetry at Millimetre-Wave Bands

Mechanically Reconfigurable Waveguide Filter Based on Glide Symmetry at Millimetre-Wave Bands

Design of voltage-controlled oscillators and frequency dividers for 60 GHZ wireless communication applications

Comprehensive review and study for the CMOS transformer tank voltage‐controlled oscillator

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