NJG1686MHH
I PCB LAYOUT
(TOP VIEW)
TRX4
TRX3
Losses of PCB and connectors, Ta=+25°C
ANT-TX2,RX1,2, ANT-TX1,
Frequency
TRX2,3,4,5
Loss (dB)
TRX1,6
Loss (dB)
(MHz)
TRX5
TRX6
TRX2
TRX1
RX1
787
915
0.36
0.38
0.37
0.58
0.64
0.72
0.34
0.35
0.34
0.53
0.57
0.66
960
C1
1910
2170
2690
C2
L1
PCB SIZE: 38.9 x 38.9 mm
PCB: FR-4, t=0.2mm
Capacitor size: 1005 [mm]
MICROSTRIP LINE WIDTH: 0.4mm
Areas being hatched are covered with
resist.
ANT
TX2
TX1
RX2
<PCB LAYOUT GUIDELINE>
(TOP VEIW)
PCB
PKG Terminal
PKG Outline
Resist
GND Via Hole
Diameter: φ= 0.15mm, 0.3mm
I PRECAUTIONS
[1] No DC block capacitors are required for RF ports unless DC is biased externally.
[2] For avoiding the degradation of RF performance, the bypass capacitor (C1) should be placed as close as
possible to VDD terminal
[3] For good RF performance, all GND terminals are must be connected to PCB ground plane of substrate,
and through - holes for GND should be placed the IC near.
- 11 -
NJRC [ NEW JAPAN RADIO ]
