A Nonlinear Lattice for High-Amplitude Picosecond Pulse Generation in CMOS

Lee, Wooram; Adnan, Muhammad; Momeni, Omeed; Afshari, Ehsan

doi:10.1109/tmtt.2011.2178255

Cited by 12 publications

(19 citation statements)

References 27 publications

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“…Similarly, amplitude of the third harmonic can be written as [26] (2) According to (1) and (2), in the absence of any loss the amplitude of the second and third harmonic increases with the length of the NLTL. For a certain , optimum length can be found where amplitude of the desired harmonic is maximum.…”

Section: Nltl-based Frequency Multipliersmentioning

confidence: 99%

“…Dispersion is a property of discreteness and affects phase velocity with respect to frequency, especially close to cutoff frequency of a transmission line. Now, if because of dispersion and is the phase mismatch, then the second harmonic amplitude can be derived as [26] ( 3) where is the complex propagation constant of the second harmonic. The above equation shows the dependence of the second harmonic on a sinc function of the accumulative phase mismatch,…”

Section: A Effect Of Dispersionmentioning

confidence: 99%

“…Earlier, pulse shaping and soliton generation in a 1-D NLTL is shown in [25]. Recently, [26] shows even sharper and higher amplitude soliton pulses using a 2-D NLTL medium. The NLTLs also have the potential of generating sub-harmonics by exploiting parametric amplification [27].…”

Section: Introductionmentioning

confidence: 98%

“…Any signal at frequency, , and amplitude, , applied at the input generates high-order harmonics as it propagates along the transmission line. The amplitude of second harmonic at any distance, , along a low-loss NLTL is calculated using perturbation analysis in [26] as (1) where is the propagation constant of fundamental frequency in the absence of dispersion, is the attenuation constant of the second harmonic, and is the slope of characteristics of a varactor.…”

Section: Introductionmentioning

confidence: 99%

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Efficient Microwave and Millimeter-Wave Frequency Multipliers Using Nonlinear Transmission Lines in CMOS Technology

Adnan

Afshari

2015

IEEE Trans. Microwave Theory Techn.

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Frequency multipliers are an attractive solution for signal generation in CMOS near and above cutoff frequencies of active devices. This work focuses on nonlinear transmission line (NLTL) based frequency multipliers, which can be employed for high output power and broadband operation. The performance of an NLTL-based multiplier is limited by the phase mismatch at frequencies of interest caused by dispersion. We propose an alternate NLTL and engineer dispersion to eliminate phase mismatch between desired harmonics. We build two prototypes. First, a 20-GHz frequency doubler is implemented in a 65-nm CMOS process. Second, to show the feasibility of our approach near , a 100-GHz frequency tripler is demonstrated in a 130-nm CMOS process ( GHz). The achieved conversion loss is 3.5 and 12.2 dB for the doubler and tripler, respectively. The frequency tripler generates maximum power of 1.5 dBm. The relative bandwidth of the doubler and tripler is about 23% and 12.3%, respectively. To the best of our knowledge, the frequency tripler outperforms any previously reported work implemented in a 130-nm CMOS at or above 100 GHz in terms of output power and bandwidth.Index Terms-Active loading, CMOS, frequency conversion, frequency doubler, frequency multiplier, frequency tripler, microwave, millimeter wave, nonlinear transmission lines (NLTLs), varactor. 0018-9480

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Section: Nltl-based Frequency Multipliersmentioning

confidence: 99%

Section: A Effect Of Dispersionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Efficient Microwave and Millimeter-Wave Frequency Multipliers Using Nonlinear Transmission Lines in CMOS Technology

Adnan

Afshari

2015

IEEE Trans. Microwave Theory Techn.

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“…2D-DA uses 2D wave propagation for power combining. 2D wave propagation in LC lattices was studied in [14][15][16] and many interesting applications were reported [17][18][19]. Especially in [14,18], electrical funnel was used to combine signals from distributed sources.…”

Section: Introductionmentioning

confidence: 99%

Two‐dimensional distributed amplifier for extreme extension of GBW, PAE and OP _1dB

Mogheyse

Naimi

2017

IET Microwaves, Antennas & Propagation

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In this study, a new technique is introduced for full power combining in distributed amplifiers which contain multiplicative gain stages. Produced powers from middle stages of multiplicative structures are always wasted in terminating resistors. This study shows that an electrical funnel can be used to combine all produced powers from all stages. To do so, two configurations are considered to terminate middle stages with transistors. It is shown how a typical distributed amplifier can be converted to a two‐dimensional distributed amplifier (2D‐DA). Analytical expressions for gain calculation are also presented. All inductors and connections of 2D‐DA are simulated by advanced design system (ADS) electromagnetic simulator with TSMC 0.18 CMOS layout specifications. Post‐layout simulation results show the trueness of the presented relations. The designed 2D‐DA shows 17.4 dB gain along 0.7–25.7 GHz bandwidth by consuming 75.2 mW DC power. More than 3.9 dBm output power at 1 dB output compression point (OP1dB) is achieved and the noise figure of the 2D‐DA is between 3.6 and 6.4 dB. Using 2D‐DA, produced powers from middle stages participate in the outgoing power. This helps to improve gain bandwidth (GBW), power added efficiency (PAE) and OP1dB by 84.3, 143 and 86%.

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Two‐dimensional distributed amplifier by 2D‐LC lattice

Mogheyse

Naimi

2016

IET Microwaves, Antennas & Propagation

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In this study a new configuration for distributed amplifiers (DAs) is presented for the first time. Using two‐dimensional (2D) LC lattices instead of one‐dimensional transmission lines leads to 2D wave propagation. This configuration can cover the traditional problem of increasing conventional DA stages by decreasing the distance of power sources to the load. This new additive gain mechanism uses an electrical funnel to add the drain powers. Gain and noise relations are extracted and a broad band, high gain, low noise DA with reasonable DC power consumption is designed. Circuit layout is presented and all inductors and connections are simulated by advanced design system electromagnetic simulator with TSMC 0.18 CMOS layout specifications. Good agreements between post layout simulation results and the presented relations are achieved. The final design shows a 21.8 dB gain along 0.7 to 43.9 GHz band width. The circuit consumes only 183 mw DC power and it shows noise figure less than 7.8 dB. The output power of this circuit at 1‐dB output compression point (OP1dB) is more than 8.1 dBm. The proposed technique yields excellent performance in comparison with other design techniques.

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A Nonlinear Lattice for High-Amplitude Picosecond Pulse Generation in CMOS

Cited by 12 publications

References 27 publications

Efficient Microwave and Millimeter-Wave Frequency Multipliers Using Nonlinear Transmission Lines in CMOS Technology

Efficient Microwave and Millimeter-Wave Frequency Multipliers Using Nonlinear Transmission Lines in CMOS Technology

Two‐dimensional distributed amplifier for extreme extension of GBW, PAE and OP _1dB

Two‐dimensional distributed amplifier by 2D‐LC lattice

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A Nonlinear Lattice for High-Amplitude Picosecond Pulse Generation in CMOS

Cited by 12 publications

References 27 publications

Efficient Microwave and Millimeter-Wave Frequency Multipliers Using Nonlinear Transmission Lines in CMOS Technology

Efficient Microwave and Millimeter-Wave Frequency Multipliers Using Nonlinear Transmission Lines in CMOS Technology

Two‐dimensional distributed amplifier for extreme extension of GBW, PAE and OP 1dB

Two‐dimensional distributed amplifier by 2D‐LC lattice

Contact Info

Product

Resources

About

Two‐dimensional distributed amplifier for extreme extension of GBW, PAE and OP _1dB