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 (resonator blocks) are substantial elements of many types of filters, duplexers and diplexers. 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-3-5560-80-J301

3 pole
F = 5560 MHz
BW = 80 MHz
Insertion loss < 1.5 dB
Attenuation Fo±100 MHz > 15 dB
Return loss > 12 dB
Ripple < 0.8 dB

Dielectric filter

TDF-BP-6-0420-80-R601

6 pole
F = 420 MHz
BW = 80 MHz
Insertion loss < 1 dB
Attenuation Fo - BW/2 > 50 dB
Return loss > 17 dB
Ripple < 0.5 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-4-1080-130-R401

4 pole
F = 1080 MHz
BW = 130 MHz
Insertion loss < 1.2 dB
Attenuation Fo - BW > 50 dB
Return loss > 17 dB
Ripple < 0.5 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

Low-pass filter

TDF-LP-11-0785-P112

11 order
F = 785 MHz
Insertion loss < 0.5 dB
Attenuation at Fo*2 > 75 dB
Return loss > 15 dB
Ripple < 0.3 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