3

Apr 01, 2005

SAW Components

B3772

902,875 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

—

902,875

—

MHz

(center frequency between 3 dB points)

Minimum insertion attenuation

α

min

including loss in matching elements

—

3,0

3,7

dB

excluding loss in matching elements

—

2,5

3,2

dB

Pass band (relative to

α

902,25 ... 903,50 MHz

—

1,3

2,0

dB

902,10 ... 903,65 MHz

—

1,3

3,0

dB

Filter bandwidth

α

2,06

2,18

2,30

MHz

Relative attenuation (relative to

α

α

rel

10,00 ... 884,00 MHz

55

59

—

dB

884,00 ... 892,00 MHz

50

54

—

dB

892,00 ... 900,00 MHz

25

28

—

dB

905,30 ... 915,00 MHz

20

23

—

dB

915,00 ... 924,00 MHz

40

44

—

dB

924,00 ...1000,00 MHz

55

59

—

dB

1000,00 ...2500,00 MHz

52

56

—

dB

Input:

=

||

—

410 || 1,1

—

Ω || pF

Output:

—

410 || 1,1

—

Ω || pF