Passive Components Blog
No Result
View All Result
  • Home
  • NewsFilter
    • All
    • Aerospace & Defence
    • Antenna
    • Applications
    • Automotive
    • Capacitors
    • Circuit Protection Devices
    • electro-mechanical news
    • Filters
    • Fuses
    • Inductors
    • Industrial
    • Integrated Passives
    • inter-connect news
    • Market & Supply Chain
    • Market Insights
    • Medical
    • Modelling and Simulation
    • New Materials & Supply
    • New Technologies
    • Non-linear Passives
    • Oscillators
    • Passive Sensors News
    • Resistors
    • RF & Microwave
    • Telecommunication
    • Weekly Digest

    TDK Introduces High Current 80VDC Board-Mount EMI Filters

    Bourns Releases High Heat Tolerant TO-227 Thick Film Resistor

    TDK Increases Current Ratings of Automotive Thin-Film Power Inductors

    Sumida Announces New DC Common Mode Choke Coil Series

    KYOCERA AVX Releases New 3dB Hybrid Couplers

    SCHURTER Unveils High Voltage Fuses for EV Applications

    YAGEO Releases First to Market 750V Aluminum Capacitors

    binder Introduces M9 Compact Circular Connector

    Smolteks CNF-MIM Capacitors Meet Thermal and Voltage Stability Industry Requirements

    Trending Tags

    • Ripple Current
    • RF
    • Leakage Current
    • Tantalum vs Ceramic
    • Snubber
    • Low ESR
    • Feedthrough
    • Derating
    • Dielectric Constant
    • New Products
    • Market Reports
  • VideoFilter
    • All
    • Antenna videos
    • Capacitor videos
    • Circuit Protection Video
    • Filter videos
    • Fuse videos
    • Inductor videos
    • Inter-Connect Video
    • Non-linear passives videos
    • Oscillator videos
    • Passive sensors videos
    • Resistor videos

    Accelerating Full Bridge LLC Resonant Converter Design with Frenetic AI

    Understanding Switched Capacitor Converters

    Coupled Inductors Circuit Model and Examples of its Applications

    Inductor Resonances and its Impact to EMI

    Highly Reliable Flex Rigid PCBs, Würth Elektronik Webinar

    Causes of Oscillations in Flyback Converters

    How to design a 60W Flyback Transformer

    Modeling and Simulation of Leakage Inductance

    Power Inductor Considerations for AI High Power Computing – Vishay Video

    Trending Tags

    • Capacitors explained
    • Inductors explained
    • Resistors explained
    • Filters explained
    • Application Video Guidelines
    • EMC
    • New Products
    • Ripple Current
    • Simulation
    • Tantalum vs Ceramic
  • Knowledge Blog
  • Suppliers
    • Who is Who
  • Events
  • Home
  • NewsFilter
    • All
    • Aerospace & Defence
    • Antenna
    • Applications
    • Automotive
    • Capacitors
    • Circuit Protection Devices
    • electro-mechanical news
    • Filters
    • Fuses
    • Inductors
    • Industrial
    • Integrated Passives
    • inter-connect news
    • Market & Supply Chain
    • Market Insights
    • Medical
    • Modelling and Simulation
    • New Materials & Supply
    • New Technologies
    • Non-linear Passives
    • Oscillators
    • Passive Sensors News
    • Resistors
    • RF & Microwave
    • Telecommunication
    • Weekly Digest

    TDK Introduces High Current 80VDC Board-Mount EMI Filters

    Bourns Releases High Heat Tolerant TO-227 Thick Film Resistor

    TDK Increases Current Ratings of Automotive Thin-Film Power Inductors

    Sumida Announces New DC Common Mode Choke Coil Series

    KYOCERA AVX Releases New 3dB Hybrid Couplers

    SCHURTER Unveils High Voltage Fuses for EV Applications

    YAGEO Releases First to Market 750V Aluminum Capacitors

    binder Introduces M9 Compact Circular Connector

    Smolteks CNF-MIM Capacitors Meet Thermal and Voltage Stability Industry Requirements

    Trending Tags

    • Ripple Current
    • RF
    • Leakage Current
    • Tantalum vs Ceramic
    • Snubber
    • Low ESR
    • Feedthrough
    • Derating
    • Dielectric Constant
    • New Products
    • Market Reports
  • VideoFilter
    • All
    • Antenna videos
    • Capacitor videos
    • Circuit Protection Video
    • Filter videos
    • Fuse videos
    • Inductor videos
    • Inter-Connect Video
    • Non-linear passives videos
    • Oscillator videos
    • Passive sensors videos
    • Resistor videos

    Accelerating Full Bridge LLC Resonant Converter Design with Frenetic AI

    Understanding Switched Capacitor Converters

    Coupled Inductors Circuit Model and Examples of its Applications

    Inductor Resonances and its Impact to EMI

    Highly Reliable Flex Rigid PCBs, Würth Elektronik Webinar

    Causes of Oscillations in Flyback Converters

    How to design a 60W Flyback Transformer

    Modeling and Simulation of Leakage Inductance

    Power Inductor Considerations for AI High Power Computing – Vishay Video

    Trending Tags

    • Capacitors explained
    • Inductors explained
    • Resistors explained
    • Filters explained
    • Application Video Guidelines
    • EMC
    • New Products
    • Ripple Current
    • Simulation
    • Tantalum vs Ceramic
  • Knowledge Blog
  • Suppliers
    • Who is Who
  • Events
No Result
View All Result
Passive Components Blog
No Result
View All Result

Role of Filters in Expanding Bandwidth for Electronic Warfare

19.12.2024
Reading Time: 4 mins read
A A

This article based on Knowles Precision Devices blog explains 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.

RelatedPosts

Learn How Supercapacitors Enhance Power System in Knowles eBook

Role of High-Q Ceramic Filters to Overcome GNSS Jamming

Knowles Extends Range and Performance of C0G MLCC Capacitors

This includes detecting and denying the use of filters in radar systems and GPS. There are three main sectors within electronic warfare. Electronic attack (EA) focuses on acts designed to disrupt, degrade, destroy or deceive. Electronic protection (EP) seeks to diminish the effectiveness of adversarial EA systems. Electronic support (ES) extracts signal information for intelligence purposes.

From a design perspective, addressing the complexity of EW missions presents broad technical challenges. To meet strict size, weight and power requirements, engineers are miniaturizing and integrating functions like signal acquisition, processing and generation into complex components. In tandem, there are efforts to develop broader bandwidth sensors and rapid sensor switching capabilities to process and analyze a wider range of frequencies and adapt in real time.

To achieve this expanded level of functionality, it’s advantageous to digitize signals earlier in the receive chain to allow the system to adapt. In software-defined radio (SDR), signal processing relies on software rather than hardware, adding the versatility needed for real-time function. While SDR isn’t new, engineers are applying it to a wider range of frequencies as RF analog-to-digital converters (RF-ADCs) advance.

Since RF-ADCs are capable of sampling at higher rates, EW receiver tuners can select larger portions of the spectrum. While this is a major advancement, there are tradeoffs to consider. As SDRs operate across more frequencies and in digital, they become more susceptible to intentional and unintentional interference (i.e., jamming).

This shift also indicates that, while there may less of a need for analog components, RF filters are still advantageous in some cases. The fundamental role of a filter is changing with technology choice and availability, and the industry needs a range of frequency bands in filters to best support these cases. As we shift from IF conversion to RF conversion, filters can focus on other essential functions like band select and anti-alias to maximize the filter bandwidth and out of band rejection.

For example, a modern tuner, shown in Figure 1, can take advantage of an RF-ADC to sample RF directly, resulting in a simpler receiver design. A band select function, like a switched filter bank, selects the relevant region of spectrum followed by a single bandpass filter, which can perform anti-aliasing for the ADC.

Figure 1: Modern wideband tuner design

An anti-alias bandpass filter is required when a digital receiver makes use of under-sampling. This is a technique where an ADC is used capture information contained in frequency bands that are at center frequencies higher than the Nyquist rate (i.e. half of the sampling rate of the ADC). This is possible up to the analog bandwidth of the ADC. For example, in Figure 2 our band of interest (shown in green) is above 0.5fs and sits in the second Nyquist zone. There will be images (show in yellow) located in the Nyquist zones above and below.

Figure 2: Anti-aliasing filter for undersampling

A bandpass filter is chosen to select the band of interest. Where the filter slope meets the red dashed line in Figure 2, noise from the images above and below will be aliased into the passband, allowing noise into the receiver, and setting a limit on the dynamic range.

A higher rejection filter would have a steeper slope, meeting the adjacent images further down the y-axis and increasing the dynamic range. Conversely, a steeper slope on a wider band filter would allow us to widen the green band of interest. The yellow images will widen also, but the increased performance filter allows us to fit within the narrowed transition band, keeping the same dynamic range as before.

Bandpass filter selection in this kind of application aims to make maximum use of the available bandwidth (up to 0.5fs) while keeping a high dynamic range. Wideband, high rejection filters are ideal in this situation, and having very wideband filters that can match the very high sampling rates of modern RFADCs is an enabler in digital receiver design.

For more information, read Combining Filter Technologies to Create Higher-Vale Compact Filters to learn how we’re supporting the evolving needs of RF system architecture in electronic warfare systems with wideband filters.

Related

Source: Knowles Precision Devices

Recent Posts

TDK Introduces High Current 80VDC Board-Mount EMI Filters

2.7.2025
12

YAGEO Releases First to Market 750V Aluminum Capacitors

30.6.2025
33

Vishay Expands Automotive High Frequency Thin Film Chip Resistors

26.6.2025
24

Advancements and Applications of Switch Capacitor Power Converters

25.6.2025
34

Accelerating Full Bridge LLC Resonant Converter Design with Frenetic AI

24.6.2025
25

Samsung Delivers Silicon Capacitors to Marwell AI Systems

24.6.2025
63

Role of High-Q Ceramic Filters to Overcome GNSS Jamming

19.6.2025
20

Advanced Conversion Announces Mass Production of 200C Film Capacitors

18.6.2025
41

Bourns Introduces 1206 Multilayer Common Mode Filters

16.6.2025
10

Smoltek CNF-MIM Capacitor Commercialization Update

11.6.2025
37

Upcoming Events

Jul 23
13:00 - 14:00 CEST

PCB design for a Smartwatch

Jul 29
16:00 - 17:00 CEST

Impact of Elevated Voltage and Temperature on Molded Power Inductors in DC/DC converters

View Calendar

Popular Posts

  • Buck Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • Boost Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • Flyback Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • What is a Dielectric Constant and DF of Plastic Materials?

    4 shares
    Share 4 Tweet 0
  • LLC Resonant Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • Ripple Current and its Effects on the Performance of Capacitors

    3 shares
    Share 3 Tweet 0
  • How to Design an Inductor

    0 shares
    Share 0 Tweet 0
  • Dual Active Bridge (DAB) Topology Explained

    0 shares
    Share 0 Tweet 0
  • SEPIC Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • Why Low ESR Matters in Capacitor Design

    0 shares
    Share 0 Tweet 0

Newsletter Subscription

 

Passive Components Blog

© EPCI - Leading Passive Components Educational and Information Site

  • Home
  • Privacy Policy
  • EPCI Membership & Advertisement
  • About

No Result
View All Result
  • Home
  • Knowledge Blog
  • Premium Suppliers

© EPCI - Leading Passive Components Educational and Information Site

This website uses cookies. By continuing to use this website you are giving consent to cookies being used. Visit our Privacy and Cookie Policy.
Go to mobile version