Model B0011E75300A00
Rev B
Additional Configurations
11
11
Port_3
10
5
4
C1
Port_1
ZO=150ꢀ [=Zout/2]
11
C=82pF
ZO=75ꢀ [=Zin]
4
7
Port_3
ZO=150ꢀ [=Zout/2]
10
5
4
2
8
1
8
1
R1
4
B0011E75300Axx
13
R=300ꢀ [Zout]
Port_1
3
ZO=75ꢀ [=Zin]
3
1
3
1
R1
B0011E75300Axx
C2
C=82pF
6
6
R=300ꢀ [Zout]
Port_2
ZO=150ꢀ [=Zout/2]
5
2
L1
12
13
12
7
L=2.4nH
Port_2
ZO=150ꢀ [=Zout/2]
9
SG1
5
VDC=V [Bias Voltage]
12
13
13
9
100mA max
C3
C4
C=82pF
Figure 4 The balun with an external inductor in the low
C=3900pF
impedance ground path. This improves the insertion loss,
return loss and balanced performance in the 870-1080MHz
range. This inductance can be realized as a transmission line
(dimensions will depend on the PCB material and ground
plane distance). The added inductance can be used in
conjunction with the external capacitors. When mounted with
high groundplane spacing, part of this inductance comes
automatically from the increased inductance of the typical via
to ground.
9
9
9
Figure 5 Biasing the balanced signals thru the balun.
Dependign on the quality of “C3” the additional capacitor
“C4” may not be needed. The DC-resistance from the bias
point thru to each of the outputs are 10±4Ω. It is important
to keep inductance to a minimum from pin 5 to ground or
balanced performance will suffer. When used with high
groundplane spacings it is recommended to have two or
more via to ground.
11
11
Port_3
4
C1
C=82pF
10
5
Port_1
ZO=150ꢀ [=Zout/2]
ZO=75ꢀ [=Zin]
4
7
2
6
6
3
R1
B0011E75300Axx
1
R=300ꢀ [Zout]
3
5
12
12
9
Figure 6 Using the balun as an single ended to single ended
impedance transformer (Unun). Pin 5 must be open circuit. It
is recommended to use the 82pF on the low impedance side to
improve the insertion loss and return loss in the 50-200MHz
range. Note that pins 4 & 7 can only be interchanged if pins 9
7 10 are also interchanged, otherwise performance will suffer.
USA/Canada:
Toll Free:
(315) 432-8909
(800) 411-6596
+44 2392-232392
Available on Tape
and Reel for Pick and
Place Manufacturing.
Europe:
ANAREN [ ANAREN MICROWAVE ]
