Ceramic Filters/Resonators

Ceramic resonators or piezoceramic resonators are electronic components made of piezoceramic or a ferroelectric material.This difference is important because not every piezoceramic has ferroelectric properties, but every ferroelectric has piezoelectric properties.They use the piezoelectric effect for frequency-determining or frequency-selecting applications and are used in a similar way to oscillating crystals, but do not have the same frequency accuracy and stability.Compared to quartz oscillators, ceramic resonators have smaller dimensions and less need for external electronic components, are more robust with regard to mechanical loads and cost less.Simple electrical filters can also be produced by mechanically coupling two or more resonators.

  • Ceramic resonator 190kHz~60 MHz (smallest size 2.5×2.0 mm, temperature range up to -40°C~+125°C)
  • Ceramic filter: e.g. 455 kHz / 10.7MHz / 27 MHz /45 MHz
  • Discriminator and Traps
  • Printed pass band filter


Manufacturers & Contacts

  • Raltron is offering a wide selection of antennas ranging in frequency from 433 MHz to 5.9 GHz. Raltron has Chip, NFC, FPA, Metal, PCB, Patch, Stub, Dipole, Helix, Ceiling and Wall Mount solutions. Applications include Bluetooth, Wi-Fi, ZigBee, Lora, Sigfox, GPS / GLONASS / BeiDou, automotive navigation, cell phones, wireless and RFID systems.Raltron offers GPS Patch antennas in three different configurations–passive patch, active external patch, and active internal patch; they vary in sizes from 9 x 9 mm to 49 x 39 mm. Additionally we offer dual band GPS/GLONASS passive patch antennas in 13 x 13 mm, 25 x 25 mm and 49 x 39 mm dimensions. Raltron’s chip antennas can operate in the 1.575 GHz Band, 2.5 to 3.8 GHz (WiMAX Frequencies) and either single or dual bands for 2.400 to 2.485 GHz and/or 4.9 to 5.9 GHz (Bluetooth/Wi-Fi) . The small size of these chip antennas from 3.2 x 1.6 mm to 10.0 x 3.2 mm, along with omni-directional radiation patterns and peak gain to 4 dBi, offers the best conversions from cost, size and performance stand point. The ultra-thin flexible antenna structure of out NFC series allows for peel and stick antenna designs for a variety of applications such as NFC payment readers, health care ID scanners and ticketing systems.

Klaus P. Kruse

Managing Director & Purchase/Sales Director