4

Jul 12, 2002

SAW Components

B3608

140 MHz

Low-Loss Filter

Preliminary Data Sheet

Characteristics

Operating temperature:

T

= -40 ˚C ... +85 ˚C

Terminating source impedance:

Terminating load impedance:

Group delay aperture:

200 kHz

min.

typ.

max.

Center frequency

138,85

140,00

141,15 MHz

(Center between 3dB points)

α

C

—

—

13

dB

Amplitude ripple (max peak to adjacent valley)

∆α

(80% of

133,60 ... 146,40 MHz

—

0,5

0,9

dB

Phase ripple (p-p)

∆ϕ

(80% of

133,60 ... 146,40 MHz

—

7

14

˚

Pass bandwidth

α

1dB

15,0

16,0

—

MHz

α

3dB

16,0

16,8

—

MHz

α

dB

—

21,0

22,0

MHz

Relative attenuation relative to

α

C

α

rel

100,00 ... 128,70 MHz

40

45

—

dB

128,70 ... 129,00 MHz

37

43

—

dB

151,00 ... 152,30 MHz

24

30

—

dB

152,30 ... 180,00 MHz

40

45

—

dB

Group delay ripple (p-p)

∆τ

(80% of

133,60 ... 146,40 MHz

—

80

140

ns

Reflected wave signal suppression

0,70

µs … 3,75 µs after main pulse

35

38

—

dB

Temperature coefficient of frequency

—

– 87

—

ppm/K