Crystal filters
Onyx Crystals produces monolithic crystal filters with number of poles from 2 to 14 for standard frequencies for the wire- and wireless communication equipment (5,0; 9,0; 12,5; 18,5; 21,4; 36,0; 45,0; 72,0; 90,0 MHz) with the various characteristics. Onyx produces also filters according to the specifications of the customers for standard and non-standard frequencies in the range from 2 to 160 MHz.
Main specification parameters of the filters:
- Passband bandwidth:
| Frequency range, MHz | Passband bandwidth |
| 2...45 | 1x10-4...3x10-3 |
| 45...70 | 1x10-4...1.5x10-3 |
| 70...100 | 1x10-4...1x10-3 |
| 100...160 | 1x10-4...1.5x10-4 |
- Passband ripple: 3 dB max;
- Insertion loss:
— for fundamental frequency: 0,5...4 dB,
— for the third overtone: 2...8 dB; - Shape factor - can be specified by the Customer;
- Stopband attenuation - can be specified by the Customer (from 30 dB to 80 dB);
- Ultimate attenuation - can be specified by the Customer (from 40 dB to 110 dB);
- Spurious response (from 15 dB to 86-90 dB);
- Operating temperature range: - 60... 80C;
- Intermodulation, VSWR, group delay distortion and termination - can be specified by the Customer.