3

Mar 20, 2003

SAW Components

B3757

434,42 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

—

434,42

—

MHz

(center frequency between 3 dB points)

Minimum insertion attenuation

α

min

(including losses in matching network)

434,26 ... 434,58 MHz

—

2,0

3,0

dB

Pass band (relative to

α

434,26 ... 434,58 MHz

—

0,5

2,0

dB

434,24 ... 434,60 MHz

—

0,7

3,0

dB

434,20 ... 434,64 MHz

—

1,0

6,0

dB

Pass bandwidth

α

0,64

0,70

0,76

MHz

Relative attenuation (relative to

α

α

rel

10,00 ... 414,50 MHz

55

62

—

dB

414,50 ... 425,00 MHz

48

55

—

dB

425,00 ... 432,22 MHz

31

35

—

dB

432,22 ... 432,62 MHz

39

44

—

dB

432,62 ... 433,60 MHz

8

11

—

dB

435,42 ... 442,50 MHz

10

14

—

dB

442,50 ... 550,00 MHz

36

44

—

dB

550,00 ... 700,00 MHz

55

60

—

dB

700,00 ... 805,00 MHz

40

45

—

dB

805,00 ...1000,00 MHz

60

70

—

dB

Input:

=

||

—

310 || 2,2

—

Ω || pF

Output:

—

310 || 2,2

—

Ω || pF