INNOVATIVE LOW PASS FILTERS

Exxelia has developed several ranges of miniature filters with different low-pass configuration (C, L, Pi, T, 2xPi, 2xL and 2xT) mainly intended to protect electronic equipment from interferences.


Low-pass filter solutions are mainly used for EMI suppression in electronics systems. Exxelia Technologies (ex-Eurofarad), part of Exxelia Group, has developed several ranges of miniature filters with different low-pass configuration (C, L, Pi, T, 2xPi, 2xL and 2xT) mainly intended to protect electronic equipment from interferences.
Exxelia Technologies produces sophisticated filters assembling Exxelia Group’s manufactured ceramic capacitors (X7R/ NPO) with ferrite inductors or winding cores in a shielding case. This solution’s main benefits are performance, reliability and optimal traceability.

Considering a filter in a shielding case implies a good metallic package to insure high shielding performances with attenuation up to 10 GHz. Among options, Exxelia offers glass sealing, steel or kovar package using tin, silver or gold plating treatments to withstand any thermally or mechanically challenged applicaiton.
Exxelia offers innovative EMI suppression filter solutions providing great shielding performance including the FC030 feedthrough mounted on shielding enclosure and FCM030 series designed to prevent EMI on printed circuit board.

FC030 series is feedthrough filter allowing to prevent not only EMI conduction but also EMI radiation on power supply or data signals designs up to 200V. FC030 insertion loss can be 20dB at 1MHz to reach 70dB up to 10 GHz. FC030 series is extremely performant on low frequencies applications.
On the other hand, FC030 can offer very low capacitance values starting from 5pF allowing to protect high bandwidth data signals. Operating temperature from -55C° up to +175C°. FC030 series is ESA qualified.

 

FCM030 features same design and performances’ as FC030 and is intended for surface mount devices. FCM030 is packaged in full metallic silver plated allowing optimal contact with ground plane that improves the interferences flow to the ground.
The series particularly fit for amplifiers, radars, sensitive HMI, accurate measuring.

Publié le 07 Aug 2017 par Marion Van de Graaf

EuMW 2017 - stand 190

Ultra low ESR, high RF power and high self-resonant frequency The NHB series is a complete range of MLCC based on NPO dielectric material providing a very high Self Resonant Frequency and limiting the parasite Parallel Resonant Frequencies. The series is available in 1111 size with capacitance ranging from 0. 3pF to 100pF. NHB series offers excellent performance for RF power applications at high temperature up to 175°C @ 500 VDC. The lowest ESR is obtained by combining highly conductive metal electrodes and proprietary of the NPO low loss rugged dielectrics. NHB series is particularly fit for high power and high frequency applications such as: cellular base station equipment, broadband wireless service, point to point / multipoint radios and broadcasting equipment. Typical circuit applications: impedance matching, bypass, feedback, tuning, coupling and DC blocking. 100% invar tuning screws with self-locking system   Invar-36 is a unique Iron-Nickel alloy (64 % Fe / 36 % Ni) sought-after for its very low coefficient of thermal expansion. With 1.1 ppm. K–1 between 0°C and 100°C, Invar-36 is about 17 times more stable than Brass which is the most traditional and common alloy Tuning Elements are made of. The working temperature range in Space is so wide that this property becomes essential for a reliable and stable cavity filter tuning. Self-locking system is a technology commonly used on Tuning Element made of Brass or other soft “easy-to-machine” alloys but is innovative and pretty advanced when applied to hard and tough Invar 36. The design consists of two threaded segments separated by two parallel slots. After cutting both parallel slots, the rotor is compressed in its length in order to create a plastic deformation. Thus, an offset is induced between the two threaded segments which generates a constant tensile stress in the rotor from the moment threaded segments are screwed. High Q Factor Dielectric Resonators Dielectric resonators are designed to replace resonant cavities in microwave functions such as filters and oscillators. Exxelia 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.

Nouveau diélectrique céramique haute tension, haute stabilité

La miniaturisation des systèmes électroniques est devenue un enjeu majeur et touche tous les domaines d’application. Afin de répondre à cette tendance, Exxelia Technologies (ex-Eurofarad) a développé une gamme de condensateurs céramique haute tension basée sur un tout nouveau matériau diélectrique (C48X) combinant tous les avantages des produits X7R et NPO/C0G. En effet, le C48X permet d’obtenir les mêmes valeurs de capacité sous tension que le X7R, avec l’avantage indéniable d’avoir un facteur de dissipation extrêmement faible (moins de 5.10-4). De plus, le C48X supporte un dV/dT très élevé jusqu’à 10kV/μs, faisant de ce matériau une solution de choix pour les applications nécessitant une charge/décharge ultra rapide ou pour des systèmes d’allumage. Les condensateurs C48X sont également parfaitement adaptés aux applications de puissance où la dissipation de chaleur peut être préjudiciable aux performances et à la fiabilité. Les condensateurs C48X du groupe Exxelia ont été développés des tailles 1812 à 16080 pour des tensions allant de 200 à 5000V, avec une capacité maximale de 10μF à 200V (10 fois supérieure par rapport à la capacité obtenue avec une céramique NPO). Les produits stackés sont proposés avec une capacité maximale de 47μF à 200V. Plusieurs solutions de report existent sur cette nouvelle gamme, compatible aussi bien avec un montage en surface qu’avec un report sur circuit à trous traversants. Toutes ces versions sont adaptées aux usages spatiaux et peuvent être conçues pour éviter le risque de whiskers (alliage étain-plomb à 10% de plomb mini). La gamme C48X est en cours d’introduction en EPPL ESA pour les tailles 0603 à 6560 de 100V à 1kV jusqu’à la taille 1210 et jusqu’à 5kV pour les tailles supérieures. Quelques applications usuelles : • Alimentations à 400Hz, • Defense • Spatial • Filtrage AC ou DC en environnement thermique

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