3

April 04, 2006

B3733

434.42 MHz

SAW Components

SAW filter

Preliminary data

Please read

cautions and warnings and

important notes at the end of this document.

Characteristics

Operating temperature range:

T

= –45 ˚C to +95 ˚C

Terminating source impedance:

Terminating load impedance:

min.

typ.

@ 25 ˚C

max.

Center frequency

—

434.42

—

MHz

Minimum insertion attenuation

α

min

—

2.1

3.0

dB

excl. loss in matching elements

—

1.5

2.2

dB

Pass band (relative to

α

434.27 ...

434.57 MHz

—

0.6

2.0

dB

434.24 ...

434.60 MHz

—

0.8

3.0

dB

434.20 ...

434.64 MHz

—

1.2

6.0

dB

Relative attenuation (relative to

α

α

rel

10.00 ...

414.00 MHz

55

60

—

dB

414.00 ...

426.50 MHz

48

53

—

dB

426.50 ...

431.00 MHz

24

28

—

dB

431.00 ...

432.22 MHz

30

35

—

dB

432.22 ...

432.47 MHz

40

45

—

dB

432.47 ...

432.57 MHz

30

52

—

dB

432.57 ...

432.62 MHz

25

52

—

dB

432.62 ...

433.60 MHz

15

18

—

dB

435.42 ...

444.50 MHz

15

20

—

dB

444.50 ...

500.00 MHz

40

45

—

dB

500.00 ...

810.00 MHz

50

55

—

dB

810.00 ... 1500.00 MHz

60

65

—

dB

1500.00 ... 2500.00 MHz

53

58

—

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:

=

||

—

350 || 2.2

—

Ω || pF

Output:

—

350 || 2.2

—

Ω || pF