Microstrip Filters Deliver Small Size at High Frequencies

Posted by Peter Matthews on May 27, 2020 9:15:00 AM

When selecting a filter implementation, one factor that is common across all frequencies is optimizing the size of the filter given the application and the required performance. At mmWave frequencies this can be prove to be a particularly interesting problem, given the change in the physical dimensions of the system as one moves from say 600MHz to 38GHz. 

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Topics: RF and Microwave

Simplifying 5G Radio Design with a New Range of 28 GHz Bandpass Filters

Posted by Tim Brauner on May 20, 2020 7:45:00 AM

As 5G innovation forges on, radio systems continue to emerge. Each system has a range of requirements, including specific RF filter performance needs, and it’s up to the 5G FR2 Ecosystem of suppliers to meet that demand. In response, Knowles Precision Devices (KPD) supports a wide variety of 5G radio applications.

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Topics: 5G, RF and Microwave

From the 1920s to the 2020s – Bandwidth Has Always Been King

Posted by Peter Matthews on May 13, 2020 8:00:00 AM

Over time, the telephone replaced the telegraph, and now cellular and voice over Internet protocol (VoIP) technology are replacing the landline. However, as more communication is done wirelessly and over the Internet, we are becoming more interested in increased bandwidth. This is because bandwidth places a limit on how quickly we can send information through a channel such as an optical fiber or a section of the radio spectrum.

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Topics: RF and Microwave, Telecom

Medical Imaging Quality Starts by Selecting the Right Components

Posted by Peter Matthews on May 6, 2020 9:12:00 AM

Healthcare professionals and patients rely on magnetic resonance imaging (MRI) technology to examine soft tissues and organs in the body to detect a variety of issues, from degenerative diseases to tumors, in a non-invasive manner. To do this, the MRI machine uses a strong magnetic field and computer-generated radio waves to produce cross-sectional images. Thus, the quality of the MRI depends on the uniformity of the magnetic field – even the smallest trace of magnetism inside an MRI scanner can disrupt the field and degrade the quality of an MRI image. 

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Topics: Capacitor, Medical

What to Think About When Replacing Film Capacitors with MLCCs

Posted by Steve Hopwood on Apr 29, 2020 2:57:00 PM

CToday, the design and development of many applications, such as power electronics in electric vehicles (EVs), is driven largely by concerns about size and weight. This means the film capacitors traditionally used by electronics engineers aren’t always the best option. Instead, multi-layer ceramic capacitors (MLCCs) are emerging as an excellent alternative to film capacitors. Let’s review some of the considerations to keep in mind when you are deciding if making the switch is the right choice for your application.  

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Topics: Capacitor

RF Filter Terminology and Specifications

Posted by Peter Matthews on Apr 22, 2020 9:15:00 AM

To choose the right filter for your application, you'll need to evaluate filter type, identify the specific filter technology that best suits your application, and ensure the filter meets your required specifications. This post is designed to serve as a quick reference on the common terms that are used to discuss filter type, technology, and specifications.

To start, there are four key Filter behaviors that sort them into types: Low Pass, High Pass, Band Pass, and Band Stop.

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Topics: RF and Microwave

Tips From the Lab: Vertical Mount MLCC’s to Save Board Space and Achieve High Capacitance Values

Posted by Steve Hopwood on Apr 15, 2020 2:56:00 PM

As many industries, including RF and automotive, need to incorporate more features in less space, engineers are constantly looking for ways to do more in a smaller footprint. For example, there is often demand for more multi-layer ceramic capacitors (MLCCs) to achieve higher capacitance values while at the same time increasingly limited space is available. Thus, continuing to simply add capacitors inside an application to achieve a higher capacitance value is not a viable option.

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Topics: Capacitor

FAQ: Does MLCC Capacitance Change with Voltage?

Posted by Steve Hopwood on Apr 8, 2020 7:00:00 AM

When an engineer designs a circuit, he or she needs to ensure that each component will “do what it says on the box.” In multi-layer ceramic capacitor (MLCC) design, one area that often concerns engineers is the fact that capacitance can fluctuate with voltage, which is known as “DC bias” or “voltage coefficient.”

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Topics: Capacitor

Live Webinar: Practicalities of Building a 28 GHz Small Cell for 5G Applications

Posted by Tim Brauner on Apr 1, 2020 2:03:33 PM

On Thursday, April 16 at 11am EDT Knowles Precision Devices and Microwave Journal will host a live Webinar about the practicalities of building a 28 GHz small cell for 5G applications.

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Supporting Medical Advancement at Knowles Precision Devices

Posted by Rich Bestafka on Mar 25, 2020 8:00:00 AM

At Knowles Precision Devices (KPD), we handle the specialty components that go in the systems that can’t quit. We have the extensive resources and subject matter knowledge to innovate around the technical and environmental challenges facing high-impact industries including military, aerospace, and beyond.

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Topics: Capacitor, News and Events, Medical

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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