Filter Basics Part 4: Key Filter Types and Technologies

Posted by Peter Matthews on Apr 27, 2022 9:00:00 AM

To help customers with filter selection, we generally provide a lot of information on what our filters can do. But in this new Filter Basics Series, we are taking a step back to cover some background information on how filters do what they do. Regardless of the technology behind the filter, there are several key concepts that all filters share that we will dive into throughout this series. By providing this detailed fundamental filter information, we hope to help you simplify your future filtering decisions.

In part 4 of this series, we provide overviews of the main filter types and key filter technologies available today.

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Topics: RF and Microwave, Filtering

PCB Design Considerations for High-Performance Filtering in mmWave Applications

Posted by Peter Matthews on Apr 20, 2022 9:00:00 AM

RF circuits for applications in the mmWave range (30 to 300 GHz) require high-performance filtering to meet the high-data, high-speed functionality that operating at these higher frequencies promises. However, filters for devices operating in the mmWave range will not function optimally if your printed circuit board (PCB) is not configured appropriately. For this reason, RF design engineers need to make a number of critical PCB design decisions that range from selecting the right materials to developing a board configuration that will limit common issues such as spurious-wave-mode propagation, conductor and radiation losses, unwanted resonance, and dispersion.

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Topics: 5G, RF and Microwave, Filtering

Filter Basics Part 3: Five Key Filter Specifications to Understand

Posted by Peter Matthews on Apr 6, 2022 9:00:00 AM

To help customers with filter selection, we generally provide a lot of information on what our filters can do. But in this new Filter Basics Series, we are taking a step back to cover some background information on how filters do what they do. Regardless of the technology behind the filter, there are several key concepts that all filters share that we will dive into throughout this series. By providing this detailed fundamental filter information, we hope to help you simplify your future filtering decisions. 

In part 3 of this series, we aim to help simplify filter selection by providing an overview and reference point for five of the most commonly discussed filter technology specifications.

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Topics: RF and Microwave

Striking a Balance for Spectrum Needs: 5G Communications vs. Aircraft Altimeter Operations

Posted by Peter Matthews on Jan 26, 2022 9:00:00 AM

At this point, you’ve likely seen a slew of mainstream news articles about 5G causing safety concerns around air travel. In fact, ahead of the rollout of new 5G services from major US telecom companies including Verizon and AT&T on Jan. 19, 2022, many international airlines canceled or delayed flights to major US airports where they believed 5G signals could possibly interfere with the radar signals required to properly operate landing equipment on their planes.

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Topics: RF and Microwave, Military and Aerospace, Filtering

Take Advantage of Open-Source RF Analysis Toolkits

Posted by Peter Matthews on Jan 12, 2022 9:00:00 AM

At Knowles Precision Devices, we truly do love all things RF. While we are focused on using our expertise in ceramics and thin film manufacturing to innovate on our high-performance filters, our engineers also enjoy keeping up with the trends impacting the entire RF “ecosystem.” This includes dedicating time to experimenting with various open-source RF modeling and analysis tools that we think our potential non-design engineer customers might find useful. One open-source RF and microwave network analysis tool we have been playing around with lately that we feel does a particularly good job is scikit-rf, which is based on the Python programming language.

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Topics: RF and Microwave

Planar Filter Technology for Millimeter Wave Applications

Posted by Peter Matthews on Dec 28, 2021 8:15:00 AM

The advent of fifth generation (5G) communications brings an increased interest in Millimeter Wave (mmWave) technologies. One of the biggest technology challenges engineers face with 5G is how to implement sufficiently high-performance RF filtering in mmWave applications. Given the frequencies involved a distributed element planar approach, such as using Microstrip or Stripline, is often ideal for constructing resonators and filters.

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Topics: RF and Microwave

Expanding Our Filter Technology Offerings to Serve Low-Frequency Applications

Posted by Peter Matthews on Dec 15, 2021 9:00:00 AM

This year, Knowles Precision Devices acquired Integrated Microwave Corporation (IMC), a leader in the design and manufacture of custom precision RF microwave filters and multiplexers for the aerospace, defense, and communications industries. This acquisition was particularly exciting as our two companies share deep expertise in engineering high-performance ceramics for RF and microwave applications. And, like Knowles Precision Devices, IMC also has a long heritage of supplying highly reliable components for mission critical space devices that includes applications such as the MARS Orbiters, MARS Landers, and MARS Rovers.

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Topics: News and Events, RF and Microwave, Military and Aerospace

Simplifying the Transition from 5G Operations at Sub-6GHz to mmWave

Posted by Peter Matthews on Nov 3, 2021 9:00:00 AM

Turning 5G wireless communication into a widespread reality will require the use of mmWave frequencies. However, there are many of us RF engineers out there that have spent much of our careers working in the sub-6 GHz range, which actually has quite different needs than mmWave. Therefore, it is critical to get a handle on the key differences between working in this range and mmWave frequencies.

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Topics: 5G, RF and Microwave

Webinar: RF Components in Emerging SATCOM Applications

Posted by Peter Matthews on Oct 6, 2021 9:00:00 AM

In recent years, the focus for satellite communication (SATCOM) applications has shifted from coverage to capacity. As a result, SATCOM devices are being pushed to operate at higher bandwidths in the Ka, V, and E bands. At the same time, these devices need to be made increasingly smaller, which means smallsats, or satellites weighing less than 500 kg, are quickly gaining momentum, making size, weight, and power (SWaP) critical design considerations as well.

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Topics: RF and Microwave, Military and Aerospace, Filtering

RF Filtering Techniques for Millimeter Wave Applications

Posted by Peter Matthews on Sep 29, 2021 8:30:00 AM

The millimeter wave (mmWave) part of the electromagnetic spectrum is at the high end of the microwave region, which spans ~300 MHz to 300 GHz, and is usually taken to mean frequencies from ~30 GHz to 300 GHz and wavelengths in the range of 1mm to 1cm (Table 1). This dramatically increases available bandwidth, thus expanding achievable data rates, which makes these frequencies extremely interesting to teams around the world working on fifth generation (5G) communications.

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Topics: 5G, RF and Microwave

Insights Into Precision Passive Devices

Knowles Precision Devices is a premier global source for Capacitors, RF Filters, EMI Filters, Resonators, non-magnetic components and advanced dielectric materials. An umbrella for the brands of Compex, DLI, Johanson MFG, Novacap, Syfer and Voltronics, Knowles Precision Devices serves a variety of markets including military, aerospace/avionics, medical equipment, implantable devices, EMI and connector filtering, oil exploration, instrumentation, industrial electronics, automotive, telecoms and data networks.

This Blog will provide insights into:

  • Filters for 5G and mmWave
  • Capacitors for High Voltage
  • Capacitors for High Reliability

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