A CMOS High-Power Broadband 260-GHz Radiator Array for Spectroscopy

Han, Ruonan; Afshari, Ehsan

doi:10.1109/jssc.2013.2272864

Cited by 169 publications

(74 citation statements)

References 32 publications

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“…Previously, [11] also verified that if the following conditions are satisfied, the amplitude should be 1:…”

Section: A Optimum Phase and Amplitude Of Gate-to-drain Voltage Gainmentioning

confidence: 95%

“…Because the of a transistor and the Q factor of a varactor at the fundamental frequency are higher than those at high frequencies, better performance can be expected. To obtain a higher , one can combine powers from a number of coupled oscillators in a chip [8], [9] or combine the powers from antennas after radiation [10], [11]. The respective oscillator in the coupled oscillators should have high efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…By using an n-stage ring oscillator, the phase of a gain stage is adjusted to the optimum value [10], [12]. In other previous works, the optimum phase has been obtained by the insertion of a transmission line between gate and drain [9], [11], [13]. The 2nd harmonic signal loss due to the low impedance of a gate of a VCO transistor has been considered as well [8], [9], [11].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Design and Analysis of 239 GHz CMOS Push-Push Transformer-Based VCO With High Efficiency and Wide Tuning Range

Koo

Kim

Hong

2015

IEEE Trans. Circuits Syst. I

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A push-push transformer-based voltage-controlled oscillator (VCO) is proposed and analyzed to achieve high efficiency and a wide tuning range at sub-terahertz (THz) frequencies.Analyses show that the coupling factor of the transformer to obtain high output power has to be carefully chosen by consideration of gate-to-drain voltage gain as well as matching impedances seen from the drain and to the gate of a VCO transistor at the 2nd harmonic frequency . Analysis also shows that the transformer-based resonator allows a wide tuning range. In addition, it has been shown that the introduction of a parallel inductor to a varactor leads to high and low phase noise. The proposed 239 GHz VCO with a 65 nm CMOS process demonstrates the high efficiency of 1.45%, the of 4.8 dBm, and the wide tuning range of 12.5% with a supply voltage of 1.2 V.Index Terms-High efficiency, J-band, millimeter wave, push-push oscillator, terahertz, transformer, voltage-controlled oscillator (VCO), wide tuning range.

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“…Previously, [11] also verified that if the following conditions are satisfied, the amplitude should be 1:…”

Section: A Optimum Phase and Amplitude Of Gate-to-drain Voltage Gainmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design and Analysis of 239 GHz CMOS Push-Push Transformer-Based VCO With High Efficiency and Wide Tuning Range

Koo

Kim

Hong

2015

IEEE Trans. Circuits Syst. I

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“…This trend is consistent with the analysis from Eqs. (3) to (8). Intuitively, multiple finger structure is employed to reduce the poly gate resistance with the price of increased parasitic capacitance.…”

Section: Mosfet Design Optimizationmentioning

confidence: 99%

Physical design optimization of MOSFETs for millimeter wave and sub-millimeter wave circuits

Liu

2015

Analog Integr Circ Sig Process

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Deep-scaled CMOS technologies have provided ultra-high speed devices and enabled the possibility to achieve integrated millimeter wave and sub-millimeter wave systemon-a-chip (SoC). However, the drawbacks and constraints of deep-scaled technologies require not only creative circuit design ideas but also accurate active device models and optimum physical design. The paper presents a systematic design approach to optimize active device physical design and build the corresponding model, which is exemplified through two layout examples. With the optimum active device physical design and new circuit design ideas, we have successfully demonstrated several key circuits in mm-wave/sub-mm-wave frequency ranges: a 450 GHz voltage controlled oscillator, a 200 GHz frequency divider, and a 200 GHz amplifier all in 65 nm bulk CMOS technologies. The availability of these key building blocks would benefit the realization of mm-wave/sub-mmwave SoCs in the future.

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“…A second harmonic oscillator, which is also called a push-push oscillator is the most popular way of high frequency generation. Second harmonic oscillators have been recently reported for 260 GHz oscillation on 65-nm CMOS and 316 GHz on 45-nm SOI CMOS [11], [12]. For even higher frequency, a third harmonic has also been used.…”

mentioning

confidence: 99%

Burst-pulse Generator based on transmission line toward sub-MMW

Kanjanavirojkul

Khanh

Nakura

et al. 2014

17th International Symposium on Design and Diagnostics of Electronic Circuits &Amp; Systems

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A Transmission-line-based Burst-pulse Generator (TPG) is proposed in this paper. The proposed architecture does not consume power in standby stage, so it is more suitable in a pulse system than a continuous wave generator. Also, the center frequency of the pulse can be higher than the Fmax of a CMOS process, since the pulse oscillation need not be sustained. The architecture is modeled and simulated in a 0.18-µm CMOS process, then the performance is compared with a push-push oscillator, which is a conventional method to generate frequency higher than process's Fmax. It is shown that our TPG has better energy conversion efficiency up to a pulse duty cycle of 10%, and the oscillation frequency above 2Fmax of the process is achieved.

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A CMOS High-Power Broadband 260-GHz Radiator Array for Spectroscopy

Cited by 169 publications

References 32 publications

Design and Analysis of 239 GHz CMOS Push-Push Transformer-Based VCO With High Efficiency and Wide Tuning Range

Design and Analysis of 239 GHz CMOS Push-Push Transformer-Based VCO With High Efficiency and Wide Tuning Range

Physical design optimization of MOSFETs for millimeter wave and sub-millimeter wave circuits

Burst-pulse Generator based on transmission line toward sub-MMW

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