Nouveau résonateur diélectrique, E7000

Le résonateur diélectrique E7000 a été conçu pour des filtres haut de gamme pour lesquels le facteur Q est essentiel, en particulier dans des applications spatiales ou militaires.


Operating frequencies in wireless communications have shifted towards high frequency band and thus frequencies higher than 1 Ghz are now commonly utilized. In addition, the microwave frequency spectrum becoming severely crowded and sub-divided into many different frequency bands, designers are systematically looking for resonators giving them a narrow bandwidth with smaller size.

Dielectric resonators are designed to replace resonant cavities in microwave functions such as filters and oscillators. Exxelia Temex, daughter company of Exxelia Group, has developed with support of ESA and CNES, a new high-end dielectric material, E7000 series, designed for high-end filters where high Q factor is requested.

E7000 is Ba-Mg-Ta materials based that combines an ultra-high Q factor and the possibility to get all the temperature coefficients upon request. E7000 provides high-performance requested for space use in the frequency range 5 to 32 GHz, and guarantees up to Qxf > 250 000 at 10GHZ.
Typical applications: Satellite multiplexing filter devices, radio links for communication systems (LMDS), military radars.

Published on 03 Oct 2016 by Marion Van de Graaf

Exxelia Ohmcraft : High Voltage Resistors for the World’s Most Advanced Medical Applications

Our resistors are designed for a variety of products to be used in medical diagnosis, treatment, and prevention. From small, implantable, and non-invasive devices, to large diagnostic imaging equipment, Exxelia Ohmcraft resistors are chosen by medical manufacturers because the operating environments are high voltage and magnetic fields where accuracy and stability are paramount. Exxelia Ohmcraft’s proprietary Micropen® precision printing technology produces superior resistor products ideally suited for medical applications, printing resistors with electrical characteristics that outperform our competitors. Our technology allows us to write a very exact serpentine pattern with more precise line width and length than conventional screen printing. Our Exxelia Ohmcraft serpentine patterned resistors produce superior electrical characteristics, including:     High Voltage (1 - 5 kV up to 50kV) Low Noise / High Ohmic Values Superior TCR and VCR (25 < TCR < 200 ppm/°C)  Resistor Value (> 1 MΩ up to 10 TΩ) Pulse Handling Capability Tolerances to 0.1%       Medical Instruments and Equipment Exxelia Ohmcraft is committed to enabling medical instrument and equipment manufacturers to continue miniaturizing their products without comprising on performance. Physicians and their patients rely on our resistors to maximize the functionality and reliability of designed for each device. Our unique Micropen® precision printing technology produces the pulse-handling capabilities needed for critical medical circuits. Exxelia Ohmcraft’s resistors are found in most defibrillators and across the spectrum of diagnostic imaging equipment.   Products: HVC, SM, HVR, HVD, and Custom   Applications: External defibrillators Internal defibrillators Electrocardiogram (ECG) systems   Medical Instrumentation Improvements to patient monitoring, diagnostic, analytic and medication delivery systems have resulted in an increased quality of patient care. These patient-interface instruments require highly stable components to ensure the accuracy of critical data needed by physicians, nurses, and diagnosticians. Micropen® precision printing technology enables us to manufacture high ohmic-value resistors with ultra-tight TCR and VCRs capable of producing the critical measurements and data required to diagnose, treat and prevent further medical action.   Products: HVC, SM, HVR, HVD, and Custom   Applications: Patient monitoring systems Medical power supplies Respiratory systems Drug pumps Drug delivery systems Prosthetics Medical cables Blood analyzers Laboratory analyzers DNA analyzers   Diagnostic Imaging Advances in diagnostic imaging have led to more accurate and precise diagnoses. As a result, more treatment and preventative options become available to patients. Exxelia Ohmcraft’s resistors are used for many diagnostic imaging applications based on proven reliability and functionality. Imaging equipment manufacturers rely on our leaded and surface-mount resistors to provide the precision and performance required by advanced imaging methods. Tightly controlled TCR and VCR, low noise, and enhanced ESD tolerance make Exxelia Ohmcraft’s high-voltage and high-value resistors a premium component to any medical imaging application.   Products: HVC, SM, HVR, HVD, and Custom   Applications: CT units X-ray systems Ultrasound devices Mammography devices Nuclear imaging systems PET scanners Radiography devices MRI devices Exxelia Ohmcraft is the leader in high performance resistor design and manufacturing. Our proprietary Micropen precision printing technology enables superior precision thick-film resistors. Exxelia Ohmcraft can meet the most challenging space instrument specifications for high voltage and high value resistors.   Exxelia Ohmcraft’s sister division, Exxelia Micropen Medical is at the forefront of medical device product development, providing design engineers with unique insights on conceiving and implementing new designs and features. 

Exxelia expands its High-Performance Dielectric Resonators and Ferrites capabilities for Microwave Applications

New capabilities include the use of its latest E7000 material, which provides narrow bandwidths, temperature stability and high Q-factor together with advanced manufacturing skills such as the capability to deliver extremely small size, and complex ferrite designs.   Exxelia&#39;s E7000 series is a Ba-Mg-Ta based material that combines an ultra-high Q-factor and the possibility to get different temperature coefficients upon request. E7000 features the highest performance requested for space use in the frequency range from 5 to 32 GHz, and guarantees a Qxf up to > 250 000 at 10GHZ. In addition, Exxelia is now able to support the most advanced RF designs with the delivery of complex geometries such as Y-shape ferrites for microwave switches or Toroidal designs for phase shifters applications. Those miniaturized and complex products may be as small as few mm only and benefit from exceptional quality, superior performance and low loss (ΔH) materials. Exxelia is a unique manufacturer producing its own raw materials for Ferrites and Dielectrics with proprietary formulations for use in the most demanding environments.   Nicolas Dabadie, Microwave Materials business development manager at Exxelia said: "We are pleased to support our customers’ more and more complex designs and demanding applications. Our unique capability to master the manufacturing from raw materials to high-end finished products opens the way to new solutions for microwave applications going from few MHz to 40GHz".     E7000 SERIES TECHNICAL SPECIFICATIONS : Dielectric constant : 24 Q x f Factor (GHz) : 250000 Frequency : Min : 5900 MHz / Max : 37150 MHz Custom shapes available : disk, cylinder, square etc… Typical Q factor: 25000 at 10 GHz   More information: https://exxelia.com/en/product/detail/636/e7000   Ferrite materials are used in microwave devices such as isolators, circulators, diplexers, filters and phase shifters. They have dielectric and magnetic properties due to the presence of magnetic ions such as iron within the composition. Exxelia also offers a wide range of dielectric resonators series, including coaxial resonators in different sizes. Please contact us for additional details !