Dielectric Filters (DF) 3 or Multi-Pole

Dielectric Filters (DF) 3 or Multi-Pole

Dielectric Filters (DF) 3 or multi-pole range up to 5.8GHz. The dielectric technology based on ceramic material of high Dielectric Constant (K) has been contributing great size reduction of a mobile telecommunication equipment, especially cellular handset and base station. That is superior in electrical performances and reliability. Furthermore it has good mass productivity and low cost.

Direct (DF) filters' highly sophisticated multi-pole design ensures high attenuation and good selectivity. The (DF) multi-pole series filter's small size (8.6 x 9.0 x 3.0 mm) means they require more less mounting space with a ripple of 1.0 dB max. Insertion loss is from 2.0 ~ 3.5 (dB) max. Center frequency range from 860 MHz to 5800 MHz with V.S.W.R 2.0 max.

Coaxial dielectric filter is the most popular and commercially successful technology. Direct takes this advance technology to manufacture coaxial type duplexer. This features high unloaded Q, excellent high power performance, flexible design capability, size reduction, low profile, and lighter weight.

Surface mount multi-pole (DF) serise RF filter package is suitable for automatic pick and place equipment which assures mechanical stability and excellent lead coplanarity. Custom designs and tighter tolerances are available on request. Products conform to the RoHS directive.

Direct will also produce devices outside these specifications to meet specific customer requirements, please contact our sales for more information.

Download complete PDF Dielectric Filters (DF) 3 or Multi-Pole.

Features :
  1. MBP 42R Series.
  2. Murata DFC Series Compatible.
  3. Application for CT1, CT2, 900MH, 1.8GHz, 2.4G WLL Cordless phone.
Dimensions (Unit: mm) (DF)
Multi-Pole (DF) Dimensions
Multi-Pole (DF) Dimensions
Typical Specifications (DF)
Part No. Center
Frequency
(MHz)
BandWidth
(MHz)
Insertion
Loss
(dB)max.
Ripple in
BandWidth
(dB)max.
V.S.W.R
max.
Attenuation
(dB)min.(MHz)
DF43R860S20A 860 fo±10 3.0 0.8 2.0 -25 at fo+30;   -22 at fo-30
DF43R1855S10A 1855 fo±5 3.5 1.0 2.0 -30 at fo+100;   -28 at fo-100
DF43R950S20A 950 fo±10 3.5 0.8 2.0 -40 at fo+30;   -35 at fo-30
DF44R3120S60A 3120 fo±30 3.0 1.0 1.5 -58 at fo+355;   -55 at fo-375
DF45R1120S40A 1120 fo±20 2.5 1.0 2.0 -50 at fo+50;   -50 at fo-50
DF33R815S20B 815 fo±10 2.5 0.8 2.0 -18 at fo+40;   -25 at fo-40
DF33R1880S50B 1880 fo±25 3.5 1.0 2.0 -40 at fo+150;   -40 at fo-150
DF23R1480S40C 1480 fo±20 2.5 1.0 2.0 -20 at fo+150;   -20 at fo-150
DF23R1960S60C 1960 fo±30 2.0 1.0 2.0 -20 at fo+200;   -20 at fo-200
DF23R2480S30C 2480 fo±15 2.5 1.0 2.0 -20 at fo+250;   -20 at fo-250
DF23R5800S200D 5800 fo±100 2.0 1.0 2.0 -5 at fo+400;   -15 at fo-400
Typical Characteristic (DF)
Dielectric Filters (DF) 3 or More Poles Type Typical Characteristic I
(DF) Type I Typical Characteristic
Center 860.000MHz (-3.280dB) & (-11.086dB) Span 200.000MHz
Dielectric Filters (DF) 3 or More Poles Type Typical Characteristic II
(DF) Type II Typical Characteristic
Center 860.000MHz (-3.281dB) & (1.719dB) Span 200.000MHz)
Order Codes (DF)
DF 3 3R 815 S 20 B
Part Number
Thickness
4 3.8mm
3 3.0mm
2 2.0mm
Number of Resonator
Center Frequency (MHz)
Connect Type
S SMD type
BandWidth (MHz)
Size (W×H) (mm)
A 11.8 × 3.8
B 8.6 × 3.0
C 5.8 × 2.0