
Zachariah PetersonNorthwest Engineering Solutions
Zachariah Peterson
Master of Science (Physics); PhD (Applied Physics, ABD); MBA (Leadership & Finance)
PCB Design for RF, Mil-Aero, Data Center, AI/ML | That guy in the Altium videos
About
39
Publications
12,619
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
20
Citations
Introduction
Former academic turned entrepreneur. Current research interests include interconnect design up to 100 GHz, including transmission line theory in pseudorandom media. Other research interests and experience includes random laser theory: stochastic emission, spatiotemporal simulations, emission control with engineered random materials; Kelly criterion: coupled vs. decoupled problems, stochastic portfolio models with periodic rebalancing.
Publications
Publications (39)
Kelly's Criterion is well known among gamblers and investors as a method for maximizing the returns one would expect to observe over long periods of betting or investing. These ideas are conspicuously absent from portfolio optimization problems in the financial and automation literature. This paper will show how Kelly's Criterion can be incorporate...
Random lasers are unique systems where lasing occurs due to repetitive scattering in a disordered nanostructure. Previous descriptions of random lasing are numerous, however a full time-dependent theory that describes the introduction of gain directly from first principles is lacking in the literature. This letter will present an analytic self-cons...
We report experimental results on the structural stability of optically pumped zinc oxide random lasers. We find that the lasing threshold is not entirely stable and depends on the accumulated light exposure received in pulsed optical pumping. We show that exposure levels below ∼1.5 kJ/cm² improve the lasing efficiency and lower the lasing threshol...
Whether a ground plane should be included between the PHY layer and an RJ45 connector in MII/RMII routing is a source of contention among PCB designers. A summary of different design strategies published in application notes and their effect on signal integrity is reviewed in this article. Some design recommendations are provided to ensure signal i...
Random lasers are unique systems where lasing occurs via repetitive scattering in a disordered nanostructure with gain. Stability and equations of motion describing multimodal stability will be presented. These results apply to semi-ordered and totally random semiconducting lasers and can be generalized to other materials.
Presented at EDI CON Online 2023 (Oct 4, 2023)
The fastest data rates being implemented in data center architecture is 224G PAM-4, which supports a variety of interconnect types between servers, routers, and other infrastructure. At the board and chip level, the PCB and package exhibit certain design challenges that can degrade signal integrity in...
Published in 2023 Interference Technology Engineer’s Master, 52nd Edition
Published in 2023 Interference Technology Engineer’s Master, 52nd Edition
Presented at EOT 2023, Herning, DK (May 11, 2023)
Differential serial channels are pushing towards 56 GHz Nyquist to target 112G NRZ and 224G PAM-4 per lane. Differential interconnects targeting these bandwidths will be implemented in package substrates and in PCBs, although the fundamental design concepts present in both domains are essentially t...
Originally published in Design007, IPC Publishing Group Inc. Full text is available at:
http://iconnect007.uberflip.com/i/1489778-design007-jan2023/39?
Originally published in Interference Technology: 2022 Signal & Power Integrity Guide, by Lectrix Group.
Presented at EDI CON Online 2022 (Oct 19, 2022)
Many systems are integrating capabilities that require mmWave beamforming. Example application areas include suites of sensors, 5G/6G systems, radar, and SATCOM. In this presentation, a review of best design practices surrounding interconnect design required to route signals into phased array structu...
Originally published in Design007, IPC Publishing Group Inc. Full text is available at:
http://iconnect007.uberflip.com/i/1472851-design007-july2022/19?
As many design teams may have experienced, high speed designs are confronted with many of the signaling and layout challenges seen in high frequency designs. High speed interconnect design should take a similar approach seen in high frequency design with respect to losses, impedance determination, and analysis. In this technical session, I’ll explo...
PCB designers often speak of “design optimization,” and causal PCB design optimization has found a stronger mathematical footing in the engineering literature over the last 10 years. In particular, transmission line design requires satisfying multiple design objectives and constraints that may be in conflict, and engineers need tools and methods to...
PCB optimization focuses on designing boards to meet specific performance metrics while satisfying specific design constraints. In particular, interconnect design requires satisfying multiple design objectives and constraints that may be in conflict, and engineers need tools and methods to help them balance design these objectives while staying wit...
Radar modules used in new automobiles have seen many advances at the chip level, board level, and signal processing level. Newer modules face multiple challenges related to increasing point cloud density, prevent on-module and inter-module interference, and coexistence with other wireless protocols, particularly as 5G rollouts get pushed into highe...
Published in Printed Circuit Design & Fab, April 2021
Current trends in integrated circuits for embedded AI are presented and future outlook is discussed.
https://pcdandf.com/pcdesign/index.php/editorial/menu-features/15566-the-future-of-ai-is-embedded
Published in Printed Circuit Design & Fab
The historical uses of S-parameters and alternative network parameters for specific situations are presented and discussed in this article.
https://pcdandf.com/pcdesign/index.php/editorial/menu-features/15092-you-don-t-always-need-s-parameters
PCB transmission lines are designed with broadband impedance matching using differential evolution while including causal dispersion and roughness. Results for striplines show that an optimized geometry can be found with differential evolution. Index Terms-Board-level interconnects, methodologies and algorithms for modeling, simulation and optimiza...
PCB transmission lines are designed with broadband impedance matching using differential evolution while including causal dispersion and roughness. Results for striplines show that an optimized geometry can be found with differential evolution.
Published by Interference Technology
https://learn.interferencetechnology.com/2020-automotive-emc-guide/
The dream in the automotive industry is fully autonomous driving, even in poor weather conditions. This requires synchronization of multiple sensor systems, as well as real-time processing of data from these systems. Current radar systems oper...
The invention provides a method for gathering and showcasing validated customer reviews of online merchants. The invention is comprised of three parts: a first part being a web page plugin application; a second part being a cloud software platform; and a third part being a block chain network. When a customer makes a purchase, the plugin (embedded...
https://www.signalintegrityjournal.com/articles/1650-coronavirus-shows-how-quickly-electronics-supply-chains-can-change
A research tool for analyzing moods in the workplace is disclosed. The invention is comprised of an automated, cloud-based software program that acts as a liaison between researchers and subjects - it automatically gathers data and performs statistical analysis within a centralized system. Said software is comprised of a dialog module (chat bot) th...
Random lasers are unique optical systems where lasing occurs due to repetitive scattering in a disordered nanostructure with gain. Herein, self-consistent time-dependent random laser theory will be used to derive criteria leading to unstable, irreproducible emission from random lasers.
Random lasers are unique optical systems where lasing occurs due to repetitive scattering in a disordered nanostructure with gain. Herein, self-consistent time-dependent random laser theory will be used to derive criteria leading to unstable, irreproducible emission from random lasers.
The invention provides a method for gathering and showcasing validated customer reviews of online merchants. The invention is comprised of three parts: a first part being a web page plugin application; a second part being a cloud software platform; and a third part being a block chain network. When a customer makes a purchase, the plugin (embedded...
A human subjects data research tool for social behavior is disclosed. The invention being comprised of a cloud-based software program that allows researchers to gather data and perform statistical analysis on a centralized system. Said software being integrated with a multitude of popular social media platforms such as, but not limited to, Facebook...
Exerting control over the emission properties in ZnO random lasers: threshold enhancement, coherence enhancement, laser annealing, and time-dependent theory.
Random lasers are unique systems where lasing occurs due to repetitive scattering in a disordered nanostructure. Previous descriptions of random lasing are numerous, however a full time-dependent theory that describes the introduction of gain directly from first principles is lacking in the literature. This letter will present an analytic self-cons...
Kelly's Criterion is well known among gamblers and investors as a method for maximizing the returns one would expect to observe over long periods of betting or investing. These ideas are conspicuously absent from portfolio optimization problems in the financial and automation literature. This paper will show how Kelly's Criterion can be incorporate...
div class="title">Microscopy Study of Morphological and Optical Changes in ZnO Nanostructures Induced by Pulsed Optical Excitation
- Volume 21 Issue S3 - Zachariah M. Peterson, Robert C. Word, Rolf Konenkamp
Zinc oxide (ZnO) is a wide bandgap n-type semiconductor with a variety of optical applications. Intense photoluminescence and strong optical scattering have shown both incoherent and coherent laser emission from ZnO films and particle agglomerations. Initial experimental and theoretical results show enhanced optical feedback in optically pumped ZnO...
Submitted for the NWS15 Meeting of The American Physical Society
Zinc Oxide Random Lasers: Threshold Enhancement and Operational Stability
Zachariah Peterson, Robert Word, and Rolf Konenkamp, Portland State University
Both incoherent and coherent laser emission have been observed from a number of zinc oxide (ZnO) nanostructures. Our initial result...
Zinc oxide (ZnO) is a wide bandgap n-type semiconductor with a variety of optical applications. Intense photoluminescence and strong optical scattering have shown both incoherent and coherent laser emission from ZnO films and particle agglomerations. Initial experimental and theoretical results show enhanced optical feedback in optically pumped ZnO...
Zinc oxide (ZnO) is a wide bandgap n-type semiconductor with a variety of optical and electrical applications and many methods of fabrication. Strong optical scattering and photoluminescence from ZnO nanoparticles and films makes the material an ideal candidate for a random laser. Previous studies have shown both incoherent and coherent random lasi...
Zinc oxide (ZnO) is a wide bandgap n-type semiconductor with a variety of optical and electrical applications and many methods of fabrication. Electrodeposition of ZnO films is possible at low temperature and ambient pressure, with doping of ZnO possible by addition of specific compounds to the deposition solution; these thin films have been used a...