RF/MW Filters

Filters that deliver high‑performance signal integrity across wide frequency ranges, combining low loss, thermal stability, and compact designs for demanding RF applications.

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View All Bandpass Filters

Bandpass Filters

High-selectivity microwave components designed for surface mount and chip-and-wire applications across 0.3 to 67 GHz.

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View All Lowpass Filters

Lowpass Filters

Surface-mount and chip-and-wire microwave components designed to attenuate high-frequency signals while passing lower frequencies.

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View All Highpass Filters

Highpass Filters

Microwave filters designed to block low-frequency signals while passing higher frequencies from 0.8 GHz to 67 GHz.

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Educational Resources

Blogs
Catalogs
Whitepapers
Videos

Filters in Radar Receivers

In the fourth installment in our RF Components for Radar series we cover how RF filters help radar receivers isolate desired signals, reject interference, and enable high-performance digital beamforming in modern radar systems.
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View Article for Filters in Radar Receivers
The Role of Filters in Expanding Bandwidth for Electronic Warfare Receivers

The Role of Filters in Expanding Bandwidth for Electronic Warfare Receivers

Electronic warfare (EW) systems are an increasingly critical component of modern warfare. They seek to control and exploit the electromagnetic spectrum to gain an advantage over adversaries while preventing them from reciprocating.
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View Article for The Role of Filters in Expanding Bandwidth for Electronic Warfare Receivers

Switch Filter Banks for Agile RF Receiver Design in Radar

For the third installment in our RF Components for Radar series, miniaturized switch filter banks help modern radar systems adapt to changing missions and crowded RF environments while maintaining high performance.
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View Article for Switch Filter Banks for Agile RF Receiver Design in Radar

Combining Filter Technologies to Create Higher-Value Compact Filters

There are hundreds of filter applications operating across a wide range of frequencies, which presents a challenge for filter designers since most filter designs don't inherently operate across these wide ranges.
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View Article for Combining Filter Technologies to Create Higher-Value Compact Filters

Filter Basics 9: An Introduction to Poles and Zeros

To help customers with filter selection, we generally provide a lot of information on what our filters can do.
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View Article for Filter Basics 9: An Introduction to Poles and Zeros

Microstrip Filters Deliver Small Size at High Frequencies

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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View Article for Microstrip Filters Deliver Small Size at High Frequencies

RF/Microwave Products Catalog

Advanced RF and microwave components engineered for demanding environments.
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View Resource for RF/Microwave Products Catalog

Microwave Products Guide

Information and recommendations about Knowles' DLI brand of Microwave Products.
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View Resource for Microwave Products Guide

RF/Microwave Products for Space Applications

High‑reliability components engineered for mission‑critical space applications.
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View Resource for RF/Microwave Products for Space Applications

Understanding the Nuances of Space-Level Qualification and Screening of Filters

Selecting high-quality, high-reliability electronic components is a necessity for meeting the rigorous requirements of space...
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View Resource for Understanding the Nuances of Space-Level Qualification and Screening of Filters

Microstrip Filter Topologies

Learn about microstrip filter choices and how they address mmWave filtering challenges.
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View Resource for Microstrip Filter Topologies

Tolerance and Size Analysis for mmWave Filter Manufacturing

Learn about the impact of manufacturing tolerance on mmWave filters.
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View Resource for Tolerance and Size Analysis for mmWave Filter Manufacturing

Do Filters Need Covers?

FAQ: Do your filters need covers?
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View Resource for Do Filters Need Covers?

Why Can't You Build Just One Filter?

FAQ: Why can't you build just one filter?
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View Resource for Why Can't You Build Just One Filter?

Why is CTE Important in Surface Mount Filters?

CTE is critical for ensuring reliability in surface-mount RF filters.
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View Resource for Why is CTE Important in Surface Mount Filters?

Build-to-Print Filters and Tolerances

We design, manufacture and test Build-To-Print (BTP) thin film filters. Our understanding of tolerances helps maximize RF pe...
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View Resource for Build-to-Print Filters and Tolerances

When Build-to-Print Thin Filters Aren't the Right Choice

There are times when Build-to-Print (BTP) filters might not be the right choice.
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View Resource for When Build-to-Print Thin Filters Aren't the Right Choice

X Band Catalog Filters

Learn more about Knowles' DLI Brand of X Band Filters of varying bandwidths and rejection requirements.
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View Resource for X Band Catalog Filters

Product Documentation

RF/MW Filter Technologies

Knowles filter technologies deliver high-performance, compact RF solutions from VHF to V-band.
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View Resource for RF/MW Filter Technologies

High Reliability Components for Satellite Communications

Knowles RF/microwave products deliver compact, reliable satellite communication solutions with stable performance.
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View Resource for High Reliability Components for Satellite Communications

Switched Filter Banks

Switched filter banks enable compact, highly integrated designs while maintaining reliability across frequency bands.
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View Resource for Switched Filter Banks

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