• Latest
  • Trending
  • All
  • Capacitors
  • Resistors
  • Inductors
  • Filters
  • Fuses
  • Non-linear Passives
  • Applications
  • Integrated Passives
  • Oscillators
  • Passive Sensors
  • New Technologies
  • Aerospace & Defence
  • Automotive
  • Industrial
  • Market & Supply Chain
  • Medical
  • RF & Microwave
  • Telecommunication

Ceramic Coaxial Resonator Filters Basics

4.1.2023

KYOCERA AVX Announced Automotive-Qualified SuperCapacitors

3.2.2023

Würth Elektronik Introduced High Current SMD Power Inductor for Automotive Applications

2.2.2023

Scientists Report Physical Evidence of Meminductance

2.2.2023

Design and Testing Strategies for High Reliability MLCCs

2.2.2023

Bourns Expands Automotive High Power Thick Film Chip Resistor Series

31.1.2023

Vishay Releases Automotive Polymer Tantalum Capacitors

1.2.2023
  • Home
  • Privacy Policy
  • EPCI Membership & Advertisement
  • About
No Result
View All Result
NEWSLETTER
Passive Components Blog
  • Home
  • NewsFilter
    • All
    • Aerospace & Defence
    • Antenna
    • Applications
    • Automotive
    • Capacitors
    • Filters
    • Fuses
    • Inductors
    • Industrial
    • Integrated Passives
    • Market & Supply Chain
    • Medical
    • New Materials & Supply
    • New Technologies
    • Non-linear Passives
    • Oscillators
    • Passive Sensors
    • Resistors
    • RF & Microwave
    • Telecommunication

    KYOCERA AVX Announced Automotive-Qualified SuperCapacitors

    Würth Elektronik Introduced High Current SMD Power Inductor for Automotive Applications

    Scientists Report Physical Evidence of Meminductance

    Design and Testing Strategies for High Reliability MLCCs

    Bourns Expands Automotive High Power Thick Film Chip Resistor Series

    Vishay Releases Automotive Polymer Tantalum Capacitors

    USB PD 3.0 Flyback Transformer Optimisation

    Aluminum Capacitor Technology with Industry Highest Energy Density >5J/cc Available for Acquisition

    DC Blocking Capacitor Selection for Mobile Stereo High-Fidelity Audio

    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
    • Filter videos
    • Fuse videos
    • Inductor videos
    • Non-linear passives videos
    • Oscillator videos
    • Passive sensors videos
    • Resistor videos
    • Sensors

    1kW Phase Shift Full Bridge Converter Design and Simulation

    Multiphase Buck Trans-Inductor Voltage Regulator (TLVR) Explained

    Smart Power Distribution Unit Architecture and Inductor Losses

    Interleaved Multiphase PWM Converters Explained

    A Pitfall of Transformer-Based Isolated DC-DC Converter

    Leakage Models of Multi-Winding Transformer in LLC Converter

    LLC Transformer Design for Power Converters

    Printed Resistors in a High Performance PCB System

    Transformer Characteristics Explained

    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
    • Preferred Suppliers
    • Who is Who
  • Events
  • Home
  • NewsFilter
    • All
    • Aerospace & Defence
    • Antenna
    • Applications
    • Automotive
    • Capacitors
    • Filters
    • Fuses
    • Inductors
    • Industrial
    • Integrated Passives
    • Market & Supply Chain
    • Medical
    • New Materials & Supply
    • New Technologies
    • Non-linear Passives
    • Oscillators
    • Passive Sensors
    • Resistors
    • RF & Microwave
    • Telecommunication

    KYOCERA AVX Announced Automotive-Qualified SuperCapacitors

    Würth Elektronik Introduced High Current SMD Power Inductor for Automotive Applications

    Scientists Report Physical Evidence of Meminductance

    Design and Testing Strategies for High Reliability MLCCs

    Bourns Expands Automotive High Power Thick Film Chip Resistor Series

    Vishay Releases Automotive Polymer Tantalum Capacitors

    USB PD 3.0 Flyback Transformer Optimisation

    Aluminum Capacitor Technology with Industry Highest Energy Density >5J/cc Available for Acquisition

    DC Blocking Capacitor Selection for Mobile Stereo High-Fidelity Audio

    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
    • Filter videos
    • Fuse videos
    • Inductor videos
    • Non-linear passives videos
    • Oscillator videos
    • Passive sensors videos
    • Resistor videos
    • Sensors

    1kW Phase Shift Full Bridge Converter Design and Simulation

    Multiphase Buck Trans-Inductor Voltage Regulator (TLVR) Explained

    Smart Power Distribution Unit Architecture and Inductor Losses

    Interleaved Multiphase PWM Converters Explained

    A Pitfall of Transformer-Based Isolated DC-DC Converter

    Leakage Models of Multi-Winding Transformer in LLC Converter

    LLC Transformer Design for Power Converters

    Printed Resistors in a High Performance PCB System

    Transformer Characteristics Explained

    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
    • Preferred Suppliers
    • Who is Who
  • Events
No Result
View All Result
Passive Components Blog
No Result
View All Result

Ceramic Coaxial Resonator Filters Basics

4.1.2023
Reading Time: 4 mins read
0 0
0
SHARES
185
VIEWS

This blog article from Knowles Precision Devices perform a deep dive on ceramic coaxial resonator filters basics, its construction, function and features.

Before jumping into a discussion on ceramic coaxial resonators, it is important to understand what a resonator is and how these electrical components work.

RelatedPosts

Design and Testing Strategies for High Reliability MLCCs

What is X2Y Bypass Capacitor and What is it Good For?

Knowles White Paper: Resonant Capacitors for Wireless EV Charging 

In general, a resonator is an essential component for constructing a bandpass filter since the resonator is what will allow specified frequencies, or bands of frequencies, to pass through the filter as shown in Figure 1.

A simple resonator, such as an LC resonator, can store frequency-dependent electric energy in the capacitance (C) and magnetic energy in the inductance (L).The resonant frequency of a resonator occurs when the energy stored in electric field is equal to the energy stored in the magnetic field.

Figure 1. An illustration of a band pass filter and its key characteristics.
Figure 2. An example showing how electrical and magnetic energy travel in a coaxial transmission line.

An Overview of Ceramic Coaxial Resonators

Now that we’ve established the basics of how a resonator works, we can explore how a ceramic coaxial resonator functions. In general, a ceramic coaxial resonator is a transmission line resonator that operates in transverse electromagnetic (TEM) mode.

Figure 3. A depiction of how a signal will be impacted depending on the type of ceramic coaxial resonator added.

TEM mode has both E- and H-field components at right angles to the z-direction and no signals in the direction of propagation as shown in Figure 2.

A coaxial resonator line is usually configured using a ceramic rectangular prism with a coaxial hole running through the center. The dielectric type, length, and metallization will dictate performance at frequency.

The line can also be cut to a specific length related to the wavelength of the frequency of interest. For example, to make the lines shorter we can use ceramics with specific dielectric constants, which will shrink the wavelength of the frequency we are interested in.

Figure 3 shows an example of how a signal is impacted when either a λ/4 resonator with one end metallized or a λ/2 resonator with both ends open is added.

Using Ceramic Coaxial Resonators to Make Filters

Let’s now look at when it may be advantageous to use ceramic coaxial resonators to create filters. In previous blog post, Basic Filter Circuits Explained, we showed a number of examples of how you can construct simple filters from different combinations of resistors (Rs), Cs, and Ls. While this approach is great for developing simple filters, as operating frequencies increase and filtering needs become more complex, you are likely to run into a variety of issues with performance and size if you continue to try to use only these basic circuit building blocks.

Instead, short-circuit ceramic coaxial resonators made with modern high-performance ceramic dielectric materials can be used in place of LC resonators. The high Q possible in the UHF and microwave frequency range makes ceramic coaxial resonators an ideal option for many applications, especially when cost, size, and stability are important.

The Capabilities of Ceramic Coaxial Resonator Filters

The plot in Figure 4 shows typical filter bandwidth vs frequency on multiple filter types including ceramic coaxial filters made by Knowles Precision Devices.

Figure 4. Bandwidth vs frequency range of different filter technology with ceramic coaxial resonator filters dark blue area with a yellow outline.

Typical ceramic coaxial resonator filters can be found to cover the following ranges:

  • Narrow to moderate bandwidths for F0 = 200MHz to 2.2 GHz for large profile 12 mm and 18 mm resonator bandpass filters, 0.2 percent to 30 percent fractional bandwidth.
  • Moderate to wide bandwidths for F0 = 1 GHz to 6 GHz for small profile 2 mm to 6 mm resonator bandpass filters, 3 percent to 45 percent fractional bandwidth
  • Narrow bandwidth band reject filters for F0 = 400 MHz to 4 GHz, 1 percent to 15 percent fractional bandwidth
Source: Knowles

Related Posts

New Technologies

Scientists Report Physical Evidence of Meminductance

2.2.2023
20
Capacitors

Design and Testing Strategies for High Reliability MLCCs

2.2.2023
30
Inductors

USB PD 3.0 Flyback Transformer Optimisation

30.1.2023
51

Upcoming Events

Feb 8
11:00 - 12:00 CET

How Does Your PCB Layout Influence the Costs in PCB Manufacturing? Würth Elektronik Webinar

Feb 27
February 27 @ 12:00 - March 2 @ 14:00 EST

Pre Cap Visual Inspection per Mil-Std-883 (TM 2017)

Mar 3
12:00 - 14:00 EST

External Visual Inspection per Mil-Std-883 TM 2009

View Calendar

Popular Posts

  • Ripple Current and its Effects on the Performance of Capacitors

    3 shares
    Share 3 Tweet 0
  • What is a Dielectric Constant of Plastic Materials ?

    4 shares
    Share 4 Tweet 0
  • Understanding High-Precision Resistor Temperature Coefficient of Resistance

    0 shares
    Share 0 Tweet 0
  • Capacitor Selection for Coupling and Decoupling Applications

    28 shares
    Share 28 Tweet 0
  • How to Choose the Right Inductor for DC-DC Buck Applications

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

    0 shares
    Share 0 Tweet 0
  • Leakage Current Characteristics of Capacitors

    0 shares
    Share 0 Tweet 0
  • What is X2Y Bypass Capacitor and What is it Good For?

    0 shares
    Share 0 Tweet 0

Newsletter Subscription

 

Archive

2022
2021
2020
2019
2018
2017

Symposium

Passive Components Networking Symposium

Passives e-Learning

Knowledge Blog

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

© EPCI - Premium Passive Components Educational and Information Site

No Result
View All Result
  • Home
  • News
  • Video
  • Knowledge Blog
  • Preferred Suppliers
  • Events

© EPCI - Premium Passive Components Educational and Information Site

Welcome Back!

Login to your account below

Forgotten Password?

Retrieve your password

Please enter your username or email address to reset your password.

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