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This section provides an overview for crystal filters as well as their applications and principles. Also, please take a look at the list of 15 crystal filter manufacturers and their company rankings. Here are the top-ranked crystal filter companies as of February, 2025: 1.KVG Quartz Crystal Technology GmbH, 2.AOR, LTD., 3.ECS Inc..
Table of Contents
Crystal filters are filters that use quartz crystals. Crystal filters are mainly used as band-pass filters to extract the required frequency components.
Crystal filters are effectively used to selectively extract frequencies because quartz crystals have high Q and steep passband characteristics.
Similar to crystal filters, SAW filters are sometimes used because they can extract the required frequency components.
Crystal filters can select only specific frequency components from a wide range of frequency components and attenuate unwanted components. For this reason, they are often used in equipment that requires highly accurate frequency selection. The most common application is in wireless communication equipment.
Wireless equipment uses a signal called a carrier wave. Carrier waves are the basic waves, such as radio waves, used to transmit and receive information. When creating a wireless signal, the information to be sent is superimposed on the carrier wave to create a communication signal. The carrier wave is then separated when it is received. In wireless equipment, it is necessary to separate the necessary frequencies from the unnecessary frequencies, and filters such as crystal filters are often used.
Crystal filters are filters that use the high Q of crystal units, where Q stands for Quality Factor and is called selectivity.
The larger the Q value, the narrower and sharper the bandwidth, and the smaller the Q value, the wider and gentler the bandwidth and frequency response.
The Q value can be calculated as follows and is expressed in terms of how much bandwidth characteristic it has in relation to the center frequency.
Q = ωo / (ω2 - ω1)
where ωo: center frequency, ω2, ω1: frequency of 1/√2 intensity relative to ωo.
A band-pass filter using LC, which is a common passive component, has a Q value of about 10^2. Crystal Filters have a high Q value of about 10^3 to 10^6, and Crystal Filters can be configured to have a high Q value. When a high Q filter is used as a band pass filter and the signal is passed through the filter, there is almost no output at frequencies other than the center frequency, making it possible to create a circuit that selectively obtains a specific frequency.
*Including some distributors, etc.
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ECS is a designer and manufacturer of frequency control connectivity, synchronization, and timing solutions, founded in 1980 and headquartered in Lenexa, Kansas, USA. The products are power inductors, Quartz Crystal oscillators, resonators, real-time clocks, and filters. Crystal products include surface mount crystals, through-hole crystals, tuning forks, and crystal units with integrated thermistors. The company serves consumer products, medical applications, automotive electronics, wearable technologies, and power generation fields. The company won the International Award 2022 Global Distributor of the Year and the Largest Customent Count Growth Award.
KLS Electronic, founded in 2002 with headquarters and factories in China, is a manufacturer of electronic components that has expanded to have more than 10 subsidiary companies. The company's extensive product line includes resistors, inductors, wiring accessories, automotive connectors, and heat sinks, which are supplied to the industrial automation, instrumentation, power, transport, shipbuilding, and new energy sectors, among others, across 30 regions worldwide. KLS Electronic also holds ISO 9001 management system certificates.
MERCURY Electronic Ind Co. Ltd is a manufacturer of quartz crystal frequency control products and inductive proximity sensors established in 1973 with its headquarters in New Taipei City, Taiwan. The company offers temperature-compensated, crystal, voltage-controlled, EMI reduction, and oven-controlled oscillators. It offers products with a frequency range of low KHz to eight hundred MHz and in miniature surface mount packages. The company is ISO 9001:2008 and ISO 14001:2004 certified and offers products used in consumer electronics, space technology, and telecommunications applications.
Murata Manufacturing Co., Ltd. (Murata Manufacturing) was founded in 1944 and is headquartered in Nagaokakyo, Japan. Murata Manufacturing designs, manufactures, and sells ceramic-based passive electronic components and solutions globally. The company operates through components, modules, and others segments, serving communications, mobility, industrial, healthcare, and personal electronics customers. They company's product offerings include noise suppression products, quartz devices,RFID devices, phase shifters, and wireless connectivity platforms. Services such as webinars and video library are also available for existing and potential customers alike.
United Photonics Technology Co. Ltd. is a manufacturer of optical components founded in 1997 and based in Fuzhou, China. The company primarily produces optical components such as polarization optics, lenses, and waveplates. It also offers crystal components such as yttrium orthovanadate (YVO4) and BBO/LBO nonlinear optical (NLO) crystals, and coating services by customer specification. The company operates internationally, with distribution operations across Asia Pacific and Europe. It mainly serves clients in the laser, semiconductor, and automation industries.
Specac Ltd., founded in 1971 as Spectroscopic Accessories Ltd, is a British manufacturer based in Cray Avenue, Orpington, providing solutions for Fourier-transform infrared spectroscopy (FTIR), X-ray fluorescence spectroscopy (XRF), and near-infrared (NIR) process spectroscopy. The company develops FTIR spectrometer accessories catering to various sampling techniques, such as attenuated total reflectance (ATR), specular and diffuse reflectance (DRIFTS), and transmission cells. It also offers fiber optic cables connected to NIR process spectrometers for real-time monitoring of industrial chemical processes as part of process analytical technology (PAT). The company also manufactures laboratory hydraulic presses and pellet dies for various spectroscopic and physical testing methods.
Filtronetics Inc., founded in 1970, is a manufacturer of RF (radio frequency) filters based in Missouri, USA. The company's product lineup includes ceramic filters, crystal filters, monolithic filters, and more. Its RF filters are used in critical applications within the United States space, defense, and flight programs. The company boasts a technical and engineering team with various expertise, including electrical engineering, mechanical engineering, test & verification, and specialized troubleshooting. The company holds certification from the Defense Logistics Agency (DLA) and approval from NASA as a vendor.
EKSMA Optics, UAB, established in 1983 and based in Vilnius, Lithuania, is a manufacturer and supplier of precision optical components, optical systems, and similar products. The company fabricates optical components, nonlinear and laser crystals, and electro-optics and laser electronics. It also produces laser line components, opto-mechanical components, and optical systems. It uses electron evaporation, ion assistance deposition, thermal evaporation, and advanced ion beam sputtered technologies for the deposition of coatings on optical and crystal elements.
Ranking as of February 2025
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | KVG Quartz Crystal Technology GmbH |
15.0%
|
| 2 | AOR, LTD. |
11.0%
|
| 3 | ECS Inc. |
10.4%
|
| 4 | Filtronetics, Inc. |
9.8%
|
| 5 | ECM Electronics Limited |
7.5%
|
| 6 | Shenzhen Crystal Technology Industrial Co.,Ltd |
6.4%
|
| 7 | MERCURY Electronic Ind Co., Ltd. |
6.4%
|
| 8 | KLS Electronic |
6.4%
|
| 9 | Chengdu Spaceon Electronics Co., Ltd |
5.8%
|
| 10 | SPK ELECTRONICS CO., LTD. |
5.2%
|
Derivation Method
The ranking is calculated based on the click share within the crystal filter page as of February 2025. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
China
|
2 | 18.2% |
|
Taiwan
|
2 | 18.2% |
|
Japan
|
2 | 18.2% |
|
United Kingdom
|
2 | 18.2% |
|
United States of America
|
1 | 9.1% |
|
Lithuania
|
1 | 9.1% |
|
Germany
|
1 | 9.1% |
229 products found - Page 1
229 products - Page 1
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