3

August 05, 2008

B3734

868.30 MHz

SAW Components

SAW filter

Data sheet

Please read

cautions and warnings and

important notes at the end of this document.

Characteristics

Temperature for specification:

T

=

25 ˚C

Terminating source impedance:

Terminating load impedance:

min.

typ.

max.

Center frequency

—

868.30

—

MHz

Minimum insertion attenuation

α

min

—

3.2

3.7

dB

excl. loss in matching elements

—

2.6

3.1

dB

Pass band (relative to

α

868.15 ...

868.45 MHz

—

1.0

3.0

dB

Relative attenuation (relative to

α

α

rel

10.00 ...

620.00 MHz

46

51

—

dB

620.00 ...

680.00 MHz

36

41

—

dB

680.00 ...

855.00 MHz

47

51

—

dB

855.00 ...

864.00 MHz

32

36

—

dB

864.00 ...

867.20 MHz

21

24

—

dB

867.20 ...

867.60 MHz

11

23

—

dB

867.60 ...

867.90 MHz

—

6

—

dB

869.50 ...

876.00 MHz

12

15

—

dB

876.00 ...

884.00 MHz

32

37

—

dB

884.00 ... 2500.00 MHz

48

53

—

dB

1)

Impedance for passband matching bases on an ideal, perfect matching of the SAW filter to source- and to load

impedance (here 50 Ohm). After removal of the SAW filter the input impedance of the input and output match-

ing network is calculated. The conjugate complex value of these characteristic impedances are the input and

output impedances for flat passband. For more details we refer to EPCOS application note #4.

Input:

—

430 || 0.8

—

Ω || pF

—

430 || 0.8

—

Ω || pF