3

Feb 10, 2004

SAW Components

X 6922 D

38,912 MHz

Bandpass Filter

Data Sheet

Characteristics

Reference temperature:

Terminating source impedance:

Terminating load impedance:

min.

typ.

max.

Center frequency

(38,874)

(38,912)

(38,950) MHz

(center between 10 dB points)

Insertion attenuation

α

Reference level for the

38,922 (38,912) MHz

17,2

18,7

20,2

dB

following data

Pass bandwidth

α

—

1,5

—

MHz

α

—

2,7

—

MHz

Relative attenuation

α

rel

36,27 ... 37,31 (36,26 ... 37,30) MHz

38,0

41,0

—

dB

40,61 ... 41,41 (40,60 ... 41,40) MHz

38,0

44,0

—

dB

Lower sidelobe (incl. second adjacent channel)

30,01 ... 36,27 (30,00 ... 36,26) MHz

43,0

50,0

—

dB

Upper sidelobe (incl. second adjacent channel)

41,41 ... 50,01 (41,40 ... 50,00) MHz

42,0

47,0

—

dB

Reflected wave signal suppression

1,6

µs ... 6,0 µs after main pulse

42,0

52,0

—

dB

(test pulse 250 ns, carrier frequency 38,922 MHz)

Group delay ripple (p-p)

∆τ

38,12 ... 39,72 (38,11 ... 39,71) MHz

—

35

—

ns

Impedance at 38,922 MHz

Input:

=

||

—

1,0 ||25,3

—

k

Ω || pF

Output:

—

0,9 ||15,0

—k

Ω || pF

Temperature coefficient of frequency

—

–18

—

ppm/K