Practical Innovation at Knowles Precision Devices

Posted by Peter Matthews on Aug 28, 2019 9:10:00 AM

Innovating essential high technology systems with demanding specifications is always challenging; making any sort of difference requires extensive resources and deep subject matter knowledge.

But that’s what keeps it interesting.

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Topics: Filter, Capacitor, Single Layer Capacitor, mmWave

Planar Filter Technology for Millimeter Wave Applications

Posted by Peter Matthews on Aug 21, 2019 9:29:00 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: Filter, mmWave, Microstrip

RF Filtering Techniques for Millimeter Wave Applications

Posted by Peter Matthews on Aug 6, 2019 3:59:00 PM

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: Filter, 5G, mmWave, Microstrip

Millimeter Wave Filter Manufacturing: Tolerance and Size

Posted by Peter Matthews on Jul 24, 2019 1:58:00 PM

One of the questions we get asked regularly is:

‘why not just integrate a filter in the board stack?’

Our answer to this comes in two parts: First there are manufacturing tolerances to consider, and second there is size.

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Topics: Filter, 5G, mmWave

Key Specifications and Practical Solutions for 5G mmWave Filters

Posted by Peter Matthews on May 21, 2019 9:17:50 AM

With the promised delivery date of 5G wireless communication fast approaching, the world is waiting to see if this next-generation network will hit its ambitious goals of 10 Gbps peak data rates, less than 1 ms latency, 10 times greater energy efficiency, and more. In past decades, each generation of mobile systems – from 1G analog systems to 2G digital standards to 3G mobile broadband capabilities to 4G LTE and LTE-Advanced networks – has overcome a unique set of challenges. Leaps in technology are necessary to enable these advancements in performance.

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Topics: Filter, 5G, mmWave

Broadband Bypass Capacitors For High Speed Optical and mmWave

Posted by Peter Matthews on Feb 27, 2019 3:42:00 PM

Microwave and mmWave frequencies are found in RF applications and in optical communications. As we see increasing interest in mmWave for RF communications and move from 28Gbps to 56Gbps NRZ and 112Gbps PAM4 in the optical world, the system as a whole needs to maintain a high interconnect bandwidth.

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Topics: Filter, Bandpass

Duplex, Duplexer, Diplexer?

Posted by Peter Matthews on Feb 5, 2019 2:10:00 PM

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: Filter

How to Specify a Filter

Posted by Peter Matthews on Jan 23, 2019 11:49:00 AM

Planar Filters

Manufactured using a thin-film process, Microstrip (planar) filters can offer a high quality factor (Q) and a reduced packaging envelope when compared to discrete lumped element designs, and are more practical at higher frequencies. The thin-film design can hold tighter design tolerances due to the distributed transmission lines forming resonant structures. Planar filters are a robust solution, attractive for applications ranging from established platforms, such as military warfare, to emerging technologies, like 5G. Below are some general-purpose resources for additional background, applications, and benefits of Microstrip filters: 

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Topics: Filter, 5G

At mmWave Surface Mount Microstrip Filters are Key to Reducing Cost

Posted by Peter Matthews on Nov 15, 2018 10:06:30 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. Components for such systems need to be selected for performance and cost – commercial systems are subject to intense price pressure and so both the purchase cost and the implementation cost of a component become important factors in selecting devices for a new design. Another key consideration can be size constraints and the need to preserve valuable board space.

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Topics: Filter, mmWave, Microstrip

Microstrip Filters deliver small size at high frequencies

Posted by Peter Matthews on Nov 7, 2018 4:47:46 PM

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.

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Topics: Filter, Bandpass, mmWave, Microstrip

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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