3

Nov 17, 2004

SAW Components

B3769

314,85 MHz

Low-loss Filter

Data Sheet

Characteristics

Reference temperature:

Terminating source impedance:

Terminating load impedance:

source- and to load impedance (here 50 Ohm). After the SAW filter is removed and input imped-

ance into the input matching / output matching network is calculated.

The conjugate complex value of these characteristic impedances are the input and output imped-

ances for flat passband. For more details, we refer to EPCOS application note #4.

min.

typ.

max.

Center frequency

—

314,85

—

MHz

(center frequency between 3 dB points)

Minimum insertion attenuation

α

min

including loss in matching elements

—

1,9

2,9

dB

excluding loss in matching elements

—

1,3

2,3

dB

Pass band (relative to

α

314,70 ... 315,00 MHz

—

0,5

2,0

dB

314,67 ... 315,03 MHz

—

0,7

3,0

dB

314,63 ... 315,07 MHz

—

1,0

6,0

dB

Filter bandwidth

α

0,54

0,59

0,64

MHz

Relative attenuation (relative to

α

α

rel

10,00 ... 294,35 MHz

48

53

—

dB

294,35 ... 304,35 MHz

45

50

—

dB

304,35 ... 312,65 MHz

25

30

—

dB

312,65 ... 313,05 MHz

33

40

—

dB

313,05 ... 314,15 MHz

13

18

—

dB

315,55 ... 322,85 MHz

13

17

—

dB

322,85 ... 335,00 MHz

38

45

—

dB

335,00 ... 600,00 MHz

43

48

—

dB

600,00 ...1000,00 MHz

60

70

—

dB

1000,00 ...2500,00 MHz

40

45

—

dB

Input:

=

||

—

350 || 2,7

—

Ω || pF

Output:

—

350 || 2,7

—

Ω || pF