Dielectric Filters and Diplexers

Ceramic coaxial resonators and multiresonator blocks are perfectly suitable as basic components for bandpass / band reject filters and diplexers. Modern ceramic materials and silver coatings cause low insertion loss, excellent temperature stability, wide frequency range and small size. Most of parameters can be fairly change according to customer specification.

Single, double or triple coaxial resonators are substantial elements of many types of filters. High permittivity ceramic substrates are used for custom designed LP and HP filters.

Basic characteristics

Dielectric filters - Typical examples

Dielectric filter TDF-BP-3-1265-80-R102 3 pole F = 1265 MHz BW = 80 MHz Insertion loss < 1.5 dB Attenuation Fo±100MHz > 20 dB Return loss > 15 dB Ripple < 0.7 dB
Dielectric filter TDF-BP-3-0994-12-H101 3 pole F = 994 MHz BW = 12 MHz Insertion loss < 2 dB Attenuation Fo±25MHz > 25 dB Return loss > 15 dB Ripple < 0.3 dB
Dielectric filter TDF-BP-6-1985-34-S601 6 pole F = 1985 MHz BW = 36 MHz Insertion loss < 4 dB Attenuation Fo±70MHz > 55 dB Return loss > 15 dB Ripple < 0.7 dB
Dielectric filter TDF-BP-3-1863-33-C211 3 pole F = 1863 MHz BW = 33 MHz Insertion loss < 2 dB Rejection 1752-1785MHz > 35 dB Return loss > 15 dB Ripple < 0.7 dB
Dielectric filter TDF-BP-3-0840-26-A301 3 pole F = 840 MHz BW = 26 MHz Insertion loss < 3 dB Rejection Fo±28MHz > 16 dB Return loss > 12 dB

Dielectric diplexers - Typical examples

Dielectric diplexer TDD-BR-4-0462-1-10-T460 2 x 4 pole F = 457/467 MHz BW = 1 MHz Channel spacing = 10 MHz Insertion loss < 1.4 dB Rejection > 75 dB Return loss > 20 dB
Dielectric diplexer TDD-BR-4-0925-25-45-C393 2 x 4 pole F = 903/948 MHz BW = 25 MHz Channel spacing = 45 MHz Insertion loss < 2.3 dB Rejection > 40 dB Return loss > 15 dB
Dielectric diplexer TDD-BP-3-1933-35-80-C220 2 x 3 pole F = 1893/1973 MHz BW = 35 MHz Channel spacing = 80 MHz Insertion loss < 2.2 dB Rejection > 30 dB Return loss > 15 dB