Dielectric Filters


Introduction (DF-C/D)

Dielectric Filters - (DF-C/D) Type
Customed Designs and Standard Parts Are Available (DF-C/D)

Token Two Block-Type Dielectric Filters (DF-C/D) range up to 5.8GHz.
Token two block-type dielectric RF filters have been designed for cellular basestation applications that use a digital pre-distortion amplifier (DPD), as they feature a wide pass band and flat ripple performance, which are required for DPD PA design.

Applications also include RF and microwave communications such as satellite and TV transmission, wireless security systems, radar, GSM, 3G, GPS, CT1, CT2, 900MHz, 1.8GHz, 2.4GHz, 5.8GHz Cordless Phone, wireless earphone, wireless microphone, aerospace and military.

The (DF-C/D) filter's small size (4.5 x 4.5 x 2.0 mm) means they require more less mounting space with a ripple of 1.0 dB max and insertion loss 2.0 (dB) max. Center frequency range from 1575 MHz to 5800 MHz with V.S.W.R 2.0 max.

The surface mount RF Dielectric Filters (DF-C/D) conform to the RoHS directive and package is suitable for automatic pick and place equipment which assures mechanical stability and excellent lead coplanarity. Customed designs and tighter tolerances are available on request. Application of specific designs also available including different Dielectric values and Q specifications adjusted to frequency requirements.

Dimensions (Unit: mm) (DF-C/D)

Two Block-Type (DF-C/D) Dimensions
Two Block-Type (DF-C/D) Dimensions

Typical Specifications (DF-C/D)

Part No. Center
Band Width
(dB) max.
Ripple in
Band Width
(dB) max.
(dB) min. (MHz)
DF1575S40C 1575 fo±20 2.0 0.7 2.0 20 at fo-100;   18 at fo+100
DF1855S70C 1855 fo±35 2.0 0.7 2.0 20 at fo+300;   20 at fo-300
DF1890S80C 1890 fo±40 2.0 0.7 2.0 15 at fo+250;   35 at fo-250
DF1950S90C 1950 fo±45 3.0 0.7 2.0 45 at fo+975;   45 at fo-975
DF2332S100C 2332 fo±50 2.5 0.7 2.0 25 at fo+500;   40 at fo-500
DF2450S100C 2450 fo±50 2.0 0.7 2.0 12 at fo+250;   15 at fo-250
DF3066S170D 3066 fo±85 2.0 1.0 2.0 10 at fo+300;   15 at fo-300
DF3480S120D 3480 fo±60 2.0 1.0 2.0 10 at fo+500;   20 at fo-500
DF3650S150D 3650 fo±75 2.0 1.0 2.0 15 at fo+750;   25 at fo-750
DF4880S160D 4880 fo±80 2.0 1.0 2.0 5 at fo+350;   15 at fo-350
DF5800S200D 5800 fo±100 2.0 1.0 2.0 5 at fo+400;   15 at fo-400

Typical Characteristic (DF-C/D)

Dielectric Filters (DF-C/D) Type Typical Characteristic I
(DF-C/D) Type I Typical Characteristic
Center 915.000MHz (-1.739dB) & (-17.998dB) Span 400.000MHz
Dielectric Filters (DF-C/D) Type Typical Characteristic II
(DF-C/D) Type II Typical Characteristic
Center 904.000MHz (-1.731dB) & (1.289dB) Span 300.000MHz

Order Codes (DF-C/D) For 2 Pole

DF 1950 S 90 C
Part Number
Center Frequency
Connect Type
S SMD type
A 7.3 × 3.6mm
B 6.0 × 3.0mm
C 4.5 × 2.0mm
D 3.6 × 1.8mm