Peter Matthews

Peter Matthews

Recent Posts

From the C Band to the V Band: A Year of Big RF Spectrum Changes in the US

Posted by Peter Matthews on Jan 13, 2021 9:00:00 AM

Looking back, 2020 was a year full of big changes regarding how RF spectrum is allocated in the US. Led by the Federal Communications Commission (FCC), multiple portions of the spectrum ranging from the C band to the V band were either opened to new uses and/or auctioned to new users throughout the year. These changes are driving a variety of new opportunities for wireless device manufacturers and broadband and cellular carriers, which is resulting in a range of exciting new challenges for RF technology vendors to help solve. 

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Topics: 5G, News and Events, RF and Microwave

Duplex, Duplexer, Diplexer?

Posted by Peter Matthews on Dec 30, 2020 6:00:00 AM

One of the things all technical disciplines excel at is creating terminology that can trip up those who are not accustomed to speaking the language every day. Take the title of this article for example. These three words sound similar and are definitely inter-related, but they are not inter-changeable.

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Topics: RF and Microwave

Bring in 2021 with New Ideas from The Top Blog Posts of 2020

Posted by Peter Matthews on Dec 16, 2020 9:00:00 AM

While 2020 has presented its fair share of challenges, it has also given us a chance to innovate on how we can help customers address some of the biggest issues they face – from addressing bandwidth and quality constraints to delivering new filtering and capacitor technologies. So, as the year comes to an end, we hope you have a little time to relax and re-read some of your favorite blog posts or maybe catch-up on some of the best content you may have missed. We hope these posts will bring you some holiday cheer, or at least provide some ideas and insights to use for a successful 2021.

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Looking Closer at Snubber Capacitors in Electric Vehicles

Posted by Peter Matthews on Nov 24, 2020 10:11:00 AM

In our last article about electric vehicles (EV), we talked about using DC link capacitors as an intermediary buffer in power converters. Today’s topic covers another useful power module component – the snubber capacitor. Snubbers are energy-absorbing circuits used to protect electronics from voltage spikes and transients caused by turning a switch from the On to Off state. Opening a switch intrinsically induces a high voltage across the device, and the snubber provides an alternate flow path for the excess energy to be absorbed by the snubber capacitor and dissipated by a resister or other load.

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Topics: Capacitor, Automotive, Electric Vehicles

Know Today’s RF Filtering Trends to Better Meet the Needs of Tomorrow’s RF Design Jobs

Posted by Peter Matthews on Nov 4, 2020 8:00:00 AM

At any given time, there are a multitude of signals at a variety of frequencies streaming all around us. Each device that relies on receiving the proper RF signals such as televisions, radios, radars, medical devices, and cell phones, requires some level of filtering. While all filters have the same basic job – remove unwanted or out-of-band signals – the specific job requirements of each filter vary depending on the RF architecture used and the needs of the final device.

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Topics: 5G, RF and Microwave, Military and Aerospace

At mmWave Frequencies, Surface Mount Components Are Key to Reducing Cost

Posted by Peter Matthews on Oct 21, 2020 8:45:00 AM

Frequencies in the mmWave spectrum play a key role in 5G communications. RF technology that was developed around existing mmWave applications has evolved to encompass the needs of 5G wireless access and components for such systems need to be selected for performance and cost. Commercial systems are subject to intense price pressure, making both the purchase cost and the implementation cost of a component important factors in selecting devices for a new design. Another key consideration is likely size constraints and the need to preserve valuable board space.

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Topics: RF and Microwave

Microwave Journal Releases mmWave RF Components Guide eBook

Posted by Peter Matthews on Oct 5, 2020 9:05:56 AM

Microwave Journal has released an all new mmWave RF Components Guide. This eBook is a collection of seven articles and white papers written to help you make the best component selections when designing your 5G products, several written by engineering experts here at Knowles. Here’s an overview of what’s included in the eBook.

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Topics: 5G, RF and Microwave, Military and Aerospace

5 Ways to Address Common RF Filtering Challenges in mmWave Applications

Posted by Peter Matthews on Sep 16, 2020 8:22:00 AM

As radio architectures evolve, the need for filters is also evolving. At the same time, the industry is working to miniaturizes mmWave devices while continually minimizing costs. This means RF designers need filter solutions that offer a smaller footprint while keeping prices manageable.

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Topics: 5G, RF and Microwave

An Introduction to the 5G Frequency Spectrum

Posted by Peter Matthews on Aug 26, 2020 9:15:00 AM

Planning is in the works for Fifth Generation (5G) communication systems that will enable a hundred-fold increase in user data-rates – and with this increase comes a need for significant increases in bandwidth over what is currently available. Why does bandwidth follow when we ask for an increase in data rates? 

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Topics: 5G, RF and Microwave

Knowles Precision Devices Gears Up for the IMS 2020 Virtual Event

Posted by Peter Matthews on Jul 29, 2020 8:45:14 AM

As with everything in 2020, the International Microwave Symposium (IMS) is a bit different this year. We’re gearing up for the live stream event next week, Aug. 4-6, where we’ll participate in the virtual exhibition and give six online MicroApp technical presentations.

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Topics: News and Events, 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.

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  • Filters for 5G and mmWave
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