RF2638
Evaluation Board Schematic - PCS/Cellular
RF=1880MHz, IF=130MHz
(Download Bill of Materials from www.rfmd.com.)
C7
10 nF
VCC
L2
*
C5
68 pF
50 Ω μstrip
50 Ω μstrip
T1
J2
J3
1
2
3
4
8
7
6
5
IF IN
RF OUT
C6
*
L1
270 nH
VCC
C1
10 nF
C2
1 nF
50 Ω μstrip
J1
LO IN
C4
*
P1
C3
*
2638400-
1
2
P1-1
VCC
L2*
C3*
C4*
C6*
GND
NC
Note: Board losses: 0.1 dB, Transformer losses: 1 dB
PCS** 2.7 nH 5 pF
5 pF 1.5 pF
3
Cellular 12 nH 22 pF 22 pF 2 pF
**Board as provided.
CON3
Evaluation Board Schematic - Dual Output
Cellular Out=836MHz, PCS Out=1880MHz, IF=130MHz
Bias Choke Only;
Not part of matching network
VCC
C7
10 nF
P1
1
2
NC
C9*
TBD
L2
100 nH
C6
0.5 pF
P1-2
VCC
GND
L3
6.8 nH
T1
T4-1
50 Ω μstrip
J3
3
PCS OUT
C8
L5
C5
100 pF
CON3
4 pF
5.6 nH
50 Ω μstrip
J2
IF IN
Dual Band, Split Outputs matching network:
Diplexed match at US cellular and PCS transmit bands.
L1*
TBD
C10*
TBD
L4
18 nH
1
2
3
4
8
7
6
5
J4
CELL OUT
50 Ω μstrip
VCC
C2
1 nF
C1
10 nF
50 Ω μstrip
J1
LO IN
C4
5 pF
C3
5 pF
Note: Board losses: 0.1 dB, Transformer loss: 1 dB
2638401, Rev 1
6-32
Rev B15 060921
RFMD [ RF MICRO DEVICES ]
