Dimensions (Unit: mm)
1.3
DF-A Dielectric Filters
DF903
7.3
3.2
4.4
8.8
3.6
Unit: mm Tol: ±0.2
Typical Specifications
Part No.
DF457S30A
DF522S10A
DF683S30A
DF740S30A
DF864S10A
DF915S25A
DF903S6A
DF927S6A
DF1890S80A
DF2403S20A
DF2475S20A
Center
Frequency
(MHz)
457
522
683
740
864
915
903
927
1890
2403
2475
Band Width
(MHz)
fo±15
fo±5
fo±15
fo±15
fo±5
fo±12.5
fo±3
fo±3
fo±40
fo±10
fo±10
Insertion
Loss
(dB) max.
3.0
3.0
2.5
2.0
2.5
2.0
3.5
3.5
1.5
3.0
3.0
Ripple in
Band Width
(dB) max.
1.0
0.5
1.0
0.5
0.5
1.0
0.5
0.5
1.0
0.5
0.5
V.S.W.R
max.
2.0
1.6
2.0
1.8
1.5
2.0
1.5
1.5
2.0
1.5
1.5
Attenuation
(dB) min. (MHz)
17 at fo+50; 30 at fo-50
23 at fo+40; 40 at fo-40
20 at fo+64; 30 at fo-64
14 at fo+64; 20 at fo-64
15 at fo+24; 17 at fo-24
20 at fo+100; 35 at fo-100
32 at fo+24
32 at fo-24
15 at fo+200; 35 at fo-200
35 at fo+75
35 at fo-75
Typical Characteristic
►1:Transmission Log Mag 10.0dB/Ref 0.00dB
2:Refection
SWR
0.2/ Ref
1.000
0.6
Δ
dB
10
1
-10
-20
-30
-40
-50
-60
-70
2:
3
1
2
Meas 1:Mkr1 915.000 MHz
-1.731dB
Meas 2:Mkr1 915.000 MHz
1.289
2
2
1
3
1
Center 915.000MHZ
Span 400.000MHZ
Continued on the following page.
02 of 19
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