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How to Select Copper Foil for High-Frequency PCB Design

The PCB materials industry has spent significant amounts of time developing materials that provide lowest possible signal loss for products with RF applications. For high speed and high frequency designs, losses will limit signal propagation distance and distort signals, and it will create an impedance deviation that can be seen in TDR measurements. In this article, we'll look at the balance between copper foil losses and other types of losses in a PCB, as well as some strategies that are commonly used to overcome roughness.

Embedded thumbnail for Assuring Your Board Is Large Enough to House All Components
How-To's
Assuring Your Board Is Large Enough to House All Components

This video covers how to make sure your board is big enough to house all your components.

Blog
Altium Designer 22.8 Update

We are happy to announce that the Altium Designer 22.8 update is now available. Altium Designer 22.8 continues to focus on improving the user experience, as well as performance and stability of the software, based on feedback from our users. Check out the key new features in the What's New section on the left side of this window!

What is Hybrid Beamforming?
Blog
What is Hybrid Beamforming?

In this article, we’ll look at beamforming implementation in an advanced method combining analog and digital techniques, known as hybrid beamforming. This method blends both digital and analog techniques to create multiple beams and thus reach multiple users with varying intensities. In the case of an RF imaging system or a radar system, hybrid beamforming in a MIMO technique also allows tracking of multiple targets with adjustable resolution.

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On-Demand Webinar
PCB Design in Altium Designer with Differential Data Transfer

Differential data transmission lines usage can be challenging for even experienced designers. First you need to be familiar with the concepts of differential data transmission, find out why it is used, and what the potential advantage for your signal. This webinar will help you determine what part of your designs need differential pairs implementations and how to create such pairs with a given wave impedance in Altium Designer.

Is your via impedance calculator accurate?
Blog
Why Most Via Impedance Calculators Are Inaccurate

The problem with every via impedance calculator that I have seen is simple: they are incomplete or totally wrong. The “incomplete” part refers to a lack of context; these calculators can roughly reproduce a well-known estimate from a legend like Howard Johnson in his Digital Design textbooks. However, these calculators never provide insight into what they are actually calculating, or where the calculated via impedance is accurate. Keep reading to see why these calculators get it so wrong, as well as the context surrounding via impedance.

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How-To's
How to Create an Interactive PDF of a Schematic Diagram

This video shows how to create an interactive PDF using the Smart PDF Wizard.

Embedded thumbnail for What is the Draftsman Document?
How to Work with Draftsman
What is the Draftsman Document?

Once your PCB layout is finished it’s time for review. This is where the Draftsman Document and Altium Designer’s Draftsman Editor comes in.

Blog
Buck Converter Simulation in Altium Designer

When designing high power circuits (usually very high voltage and/or current), you’ll need to create a regulator from scratch and place it in your PCB layout. It's also the case that you may want to model a real component using discretes in a simulation in order to qualify the system's expected operating regime. As part of buck converter design, you can easily run a buck converter simulation directly in Altium Designer’s schematic editor. Here’s how you can access these features in the newest version of Altium Designer. 

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How to work with Multiboard
Adding Project Modules to a Multi-board Schematic

If you’re using multiple PCBs in your Multi-board design, Altium Designer allows you to add existing projects directly to your schematic with modules. We’ll show you how to quickly and efficiently add these projects to your Multi-board design.

PCIe 6.0 Overview
Blog
Overview of the PCIe 6.0 Standard

Just as you get used to PCIe 5.0, they decide to release another standard! The newest iteration of PCIe is Gen6, or PCIe 6.0. PCIe 6.0 brings a doubling of channel bandwidth through introduction of PAM-4 as the signaling method in high-speed differential channels. This signaling method is a first for PCIe, and it’s an important enabler of the doubled data rate we see in the current standard. In this article, I’ll run over the important points in the standard and what PCB designers can expect when designing these channels.

Embedded thumbnail for Checking for Creepage in High Voltage Designs
How-To's
Checking for Creepage in High Voltage Designs

High voltage devices have leakage currents that propage over the surface of the board. In such devices, it's important to consider not only the standard gap between the two topological elements, but also the shortest possible path between them, taking into account cut-outs and holes. With Altium Designer 20, you can check for creepage using the new creepage distance rule.

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How to create a PCB Footprint
Creating BGA Footprints with the Footprint Wizard

Altium Designer makes it easy to create a BGA footprint using our IPC compliant footprint wizard. We'll show you how easily you can create and modify a BGA footprint using the footprint wizard.

SPI vs. I2C For Memory Access
Blog
SPI vs. I2C: How to Choose the Best Protocol for Your Memory Chips

One of the common implementations of SPI and I2C in a PCB layout is as a protocol for reading and writing to an external Flash memory. Flash chips are a very common component in embedded systems and can offer high capacities of non-volatile memory up to Gb values. When choosing a memory chip, you'll want to match the application requirements and functionality with the bus speed you need for read and write operations in your memory chip. There is also the matter of the type of Flash memory you'll need to access (NOR vs. NAND).

On-Demand Webinar
Tips & Tricks: Board Shape Creation

Being able to design a board in your ECAD environment doesn’t mean that it is manufacturable in real life. You have to make sure your CAD representation won’t have any problems in the real world by taking some precautions. For example, there are certain areas that need to be free of components and have specified clearances like your board edge. This webinar will help you get acquainted with the creation and modification of your board shape so that you can ensure manufacturability.

Blog
Is There an SPI Trace Impedance Requirement?

There is no SPI trace impedance requirement? The reality is that SPI lines only start to need impedance control when the length of the interconnect becomes very long. And because there is no specific impedance requirement in the bus, you have some freedom in channel design and termination. So what exactly qualifies as “very long” and when is some termination method needed? We’ll break it down in this article.

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How-To's
How to Remove Unused Pad Shapes

Unused pad shapes can cause distortion among other problems so it is best to exclude them from your designs. This video shows how to remove unused pad shapes.

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How to work with Layer Stack Manager
Stackup Presets and Templates

In this video, we will learn how to apply predefined layer stacks to the board, as well as how to save the layer stack file as a template.

The Skin Effect and EM Fields
Blog
The Skin Effect, Current Density, and the Electromagnetic Field

During this year's AltiumLive CONNECT event, I recall receiving an interesting question about the skin effect and the distribution of current due to the presence of ground in coplanar transmission lines. In this article, we'll look at the electric field around a transmission line carrying a signal, and how this might be impacted by the skin effect.

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How to create a PCB Footprint
Creating a PCB Footprint Assembly Drawing

If you need to create an assembly drawing of your PCB Footprint for your outjob files we can show you how in Altium Designer. We’ll walk through all the different options for your assembly drawing in your Draftsman document, how to create your assembly drawing and assign it designators.

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PCB Motherboard with Multiple Slots with RAM Memory Installed, and Other System Hardware
Blog
Designing for Multiple PCBs in the Same Project

The majority of our PCB designs sit as a single PCB under our Altium Designer projects. It sometimes happens that we have a single project that requires multiple PCBs with various stuffing options, but when it happens, a lot of us tend to get stuck. How do you handle the exact change across both projects? How do you guarantee those changes to be identical? This article will review an approach to managing multiple PCB designs within a single project, ensuring your single source of truth.

EMI and thermal challenges in 5G design
Blog
Designing 5G Devices

The next stage in the evolution of mobile telephony is here with the roll-out of 5G. The designer looking to incorporate functionality to handle 5G signals into their circuits will face some challenging issues. So, what’s so special about 5G?

PCB tracks
Blog
All About Your PCB Trace Length: How Long is Too Long?

The maximum PCB trace length you can place between two components depends on multiple factors, such as signaling protocol, component specification, losses in PCB laminate, and skew. With all this in mind, let’s look at where losses accumulate along the channel.

LDO
Blog
Using an LDO vs. Switching Regulator in Your PCB

For low power devices, we generally see two types of power regulators: a low dropout regulator (LDO) or a switching regulator. You can mix and match these at different points along your power bus, but there’s still the matter of choosing whether to use an LDO vs. a switching regulator in your designs. If you’ve ever wondered how these decisions are made and when to use each type of regulator, just know that there is more to this decision than simply looking at the input/output voltage/current.

Natural flux
Blog
What They Don’t Teach You About Fluxes

PCB fabrication is an extremely complex technological topic that deserves recognition as the most fundamental part of PCB engineering. Unless connectors, conductive adhesive, wire-bonding, or zebra-tape are used, in the modern electronics industry it’s always necessary to use some kind of flux during the soldering process to create an electric connection. In this article, we’ll discuss fluxes — what they are, what they are made of (yes, there is going to be a lot of chemistry, don’t be scared), how they should be used, and in what direction the industry is going.

PCB with ice for best cooling
Blog
Thermal Management for Integrated Circuits

As anyone who designs and builds electronic devices knows, the device will generate heat when it’s switched on. Wherever current flows through an impedance, energy losses will manifest themselves as heat. Integrated circuit packaging is getting smaller to meet the trend for more compact devices but at the cost of poorer thermal properties. This article describes the basic thermal management approaches to consider in your next designs. 

Blog
Anatomy of Latitude Part Two: "Thread with a Needle” in the context of energy

We continue to explore the magic of energy conversion in a PWM transducer. Why is it magic? Theoretically, in a PWM transducer this happens without losses, isn't that magic? A PWM transducer, like a tailor with scissors, cuts the “fabric of energy” into pieces, and then, like a sewing machine, stitches the pieces of energy into a dress - DC Magnitude. What is a constant component and how can we get it? Let's explore!

Pulse Width Regulation Module
Blog
Anatomy of Latitude Part One: Pulse Width Modulation (PWM) as a Result of the Evolution of Linear Systems

There are different techniques in the world of technology to achieve various goals, both final and intermediate. Some techniques are so successful that they are commonly used with high efficiency. Electronics is no exception. The greatest example is the use of Pulse Width Modulation (PWM) signals (energy), which is applied in any modern electronic device. To apply PWM effectively, it is necessary to understand the engineering difficulties that engineers faced in the past, and the thoughts and ideas that subsequently were combined into effective, complete PWM power solutions.

Electrolytic capacitor
Blog
What Influences Electrolytic Capacitor Lifespan?

If you speak with a bunch of design engineers, you might quickly form the opinion that the electrolytic capacitor has a particularly dubious reputation. A faulty electrolyte mix used in these types of capacitors led to premature device failures, and quite often, a “bit of a mess” was made to the PCBs on which they were soldered. However, despite the problem of the capacitor plague, this article is focusing on helping the designer understand how to get many more years of useful life from an electrolytic capacitor.

Elegant writing
Blog
Creating Elegant and Readable Schematics

A schematic drawing will not only tell your PCB design software what needs to connect where, but it also communicates the purpose of a circuit to other people. It’s easy to create a schematic, but it can be harder to make a helpful schematic that can be quickly and easily read and comprehended by the reader. In this guide, based on years of industry experience, we will show you how to improve your schematic layout so that your designs are elegant and readable.

Copper rings
Blog
Must Have Rapid Prototyping Tools

Suppose your job involves rapidly iterating designs or creating a wide variety of products for clients. In that case, there are some essential tools available that can save you a tremendous amount of time, bringing high engineering risk devices to completion successfully. Whether you’re working on internal projects or developing high mix devices for clients as a consulting or freelance firm, these indispensable tools will help you ship a higher quality product in less time. 

Blog
Best Practices for Sharing PCB Files vs. Sharing PCB Projects

Even though today’s cloud platforms are immaculately secure and they allow a range of files to be easily shared, there are times where you should limit the data you’re sharing to only the critical files required. For PCB designers, this means either sharing entire design projects or sharing individual files with your manufacturer, customers, contractors, or collaborators. If you want to eliminate liabilities and keep your team’s design data secure, consider these best practices for sharing PCB design data with Altium 365.

Principial Schematic
Blog
Best Practices for Using Reference Designs

Best component companies will release reference designs for their new and legacy products to show designers an example application for a component. If the reference design is good enough and it very nicely illustrates how to quickly engineer around a few main components, I’m likely to use them in the design and the component maker has just earned my business. If you’re a newer designer and you’re wondering whether reference designs are right for your next project, follow these best practices so that you don’t make any mistakes with your reference design.

Traces on PCB
Blog
Transmission Line Fundamentals And Electromagnetic Fields, Part 1

When we deal with “abstract” aspects of electromagnetic fields and how they function, it can be easy to get lost in the weeds regarding them. The first part of this article will address an important aspect of transmission line fundamentals, namely how electromagnetic fields and waves propagate on a transmission line. This article’s end goal is to create a core understanding of these concepts so that when it comes time to design a PDS, the proper design methodologies are followed and a properly working PDS is achieved appropriately, the first time and every time.

BGA pads
Blog
Your Complete Guide to Via Stub Analysis

Via stubs are sometimes viewed as an annoyance, especially when you only need to make a transition between adjacent layers. For low speed, less-dense boards with low layer count, via stubs are an afterthought, or they may not receive consideration at all. For faster edge rates/higher frequencies, the conventional wisdom is to remove all via stubs. The question is: what exactly counts as “high frequency,” and how do you figure out the relevant length?

Thermal camera on people
Blog
Using a Thermal Camera for PCB Diagnostics

Unlike the clumsy human finger, a thermal camera can detect minute temperature differences across its view. This allows you to rapidly identify any components that are consuming current. Any parts or areas of your board that draw current will also generate heat that can easily be picked up by a thermal camera.

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Embedded thumbnail for Working with PCB Keepouts
Working with PCB Keepouts

When working in the PCB, there may be specific areas that you would want to prevent the presence of certain objects, such as vias, tracks or copper regions. All of this can be realized in Altium Designer by using the Keepouts feature.

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Discovering Altium 365
Design Review Use Case

Design reviews are critical to being successful. Capture design discussions through contextual commenting in the web browser or in Altium Designer to ensure feedback is recorded and actioned effectively.

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Resolving Errors in the PCB

We’ve looked at how to set up the Design Rule Checker to help us analyze our PCB design errors. Now it’s time to resolve these errors and prep our design to start generating output files.

Embedded thumbnail for Defining the Layer Stackup
Defining the Layer Stackup

The PCB is designed and formed as a stack of layers and the definition of the PCB layer stack is a critical element of successful printed circuit board design. In Altium Designer, the Layer Stack Manager is used to develop the printed circuit board internal design including layer-pairing, careful via design, any back drilling requirements, rigid/flex requirements, copper balancing, layer stack symmetry, and material compliance. This video guides you through creation of a layer stackup, adding the necessary layers, as well as adding an impedance profile.

Embedded thumbnail for Searching for Errors in Schematic
Searching for Errors in Schematic

Searching for Errors: Errors and mistakes happen to everyone - from beginners to professionals. So we always preach how it is paramount for your design to be validated before pushing it to the PCB. But luckily it’s pretty easy to find and analyze any errors using Altium Designer. We’ll take a look at how to find and analyze errors in your schematic.

Embedded thumbnail for Creating Net Classes
6月 2, 2020
Creating Net Classes

A Net Class is a collection of nets that can be used for creating a targeted design rule. So for example, you may want all power and ground nets to have a minimum track width to handle a specific current rating. So we’ll show you how to assign these nets to a NetClass. 

Embedded thumbnail for How to Transfer Libraries to Concord Pro
New in Altium Designer 20 5月 6, 2020
How to Transfer Libraries to Concord Pro

This video demonstrates how the Library Migrator can quickly move database and integrated libraries to the Concord Pro workspace. Your design can be organized and verified in the Library Migrator before pushing it to the cloud. After migration, the Messages panel will display any missing information.

Embedded thumbnail for Improved Impedance Calculator
New in Altium Designer 20 4月 29, 2020
Improved Impedance Calculator

The impedance calculator in the Layer Stack Manager now supports single and differential coplanar structures. This video shows how the impedance calculator has been improved with new coplanar transmission line structures, greater control over the dimensional properties of the physical structure, and modeling of Conductor Surface Roughness using Surface Roughness and Roughness Factor values. 

Embedded thumbnail for Propagation Delay Support
New in Altium Designer 20 4月 27, 2020
Propagation Delay Support

In Altium Designer 20.0, you can now selectively monitor propagation delay along the whole connection or selected objects, such as tracks, pads, and vias.

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New in Altium Designer 20 4月 23, 2020
New Routing Capabilities

Advanced routing capabilities help you complete the most basic, as well as the most difficult, routing challenges. In Altium Designer 20.0, we’ve added intelligent control over pad entries that are capable of working with any combination of pad geometry as well as a new any angle routing mode that allows you to make beautiful traces that smoothly contours around obstacles.

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New in Altium Designer 20 4月 21, 2020
New Length Tuning Engine

The tuning engine in Altium Designer has been redesigned and is now better than ever. Tuning sections can be picked up and moved to new locations on the track. What is truly remarkable is that the tunings are completely dynamic and change shape and fill patterns depending on the boundaries and surroundings.

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Working with Polygons 4月 3, 2020
How to Assign Names to Polygons

For some polygons, it is not always reasonable to use an automatically generated name so a custom name is needed. With a proper polygon name, you can quickly find the desired polygon in a list and correctly set the pour priority in relation to other polygons. By using unique names, you can create design rules that apply only to specified polygons.

Embedded thumbnail for How to Use View Mode in Altium Designer Without a License
How-To's 3月 16, 2020
How to Use View Mode in Altium Designer Without a License

In Altium Designer 20.0, you can use Altium Designer in Viewer mode when signed into your AltiumLive account and no active license is being used. The Altium Designer Viewer license can be used by anyone with an AltiumLive account and no other licenses or subscription is needed. The license can be activated from the License Management page. 

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New in Altium Designer 20 2月 26, 2020
Any Angle Routing

With any angle routing in Altium Designer, you're able to expertly maneuver around obstacles on a densely populated board, routing deep into your BGA, eliminating the need for extra signal layers. With an intelligent obstacle avoidance algorithm, you're able to avoid obstancles using tangential arcs, making the most efficient use of your board real estate.

Embedded thumbnail for Schematic Dynamic Data Model
New in Altium Designer 20 2月 26, 2020
Schematic Dynamic Data Model

Recompiling large schematics can take up a lot of time. This is why Altium Designer uses a new dynamic data model, which incrementally and continuously compiles in the background eliminating the need to perform a full design compile.

Embedded thumbnail for Time Based Matched Lengths
New in Altium Designer 20 2月 26, 2020
Time Based Matched Lengths

High-speed digital circuits depend on signals and data arriving on time. If traces are improperly tuned, flight times vary and data errors can be abundant. Altium Designer 20 introduces the calculation of the propagation time on traces and provides synchronized flight time for high-speed digital signals.

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