Integration Manual

SARA-R4/N4 series - System Integration Manual
UBX-16029218 - R11 Design-in Page 88 of 157
Manufacturer
Part Number
Product Name
Description
86 x Ø 199 mm
Laird Tech.
OC69271-FNM
GSM / WCDMA / LTE pole-mount antenna with N-type(M)
698..960 MHz, 1710..2690 MHz
248 x Ø 24.5 mm
Pulse
Electronics
WA700/2700SMA
GSM / WCDMA / LTE clip-mount MIMO antenna with cables and SMA(M)
698..960 MHz,1710..2700 MHz
149 x 127 x 5.1 mm
Table 24: Examples of external antennas
2.4.2 Antenna detection interface (ANT_DET)
2.4.2.1 Guidelines for ANT_DET circuit design
Figure 35 and Table 25 describe the recommended schematic / components for the antenna detection
circuit that must be provided on the application board and for the diagnostic circuit that must be provided
on the antenna’s assembly to achieve antenna detection functionality.
Application Board
Antenna Cable
SARA-R4/N4
56
ANT
62
ANT_DET
R1
C1 D1
L1
C2
J1
Z
0
= 50 Ω Z
0
= 50 Ω
Z
0
= 50 ohm
Antenna Assembly
R2
C4
L3
Radiat ing
Element
Diagnostic
Circuit
GND
L2
C3
Figure 35: Suggested schematic for antenna detection circuit on application PCB and diagnostic circuit on antenna assembly
Reference
Description
Part Number - Manufacturer
C1
27 pF Capacitor Ceramic C0G 0402 5% 50 V
GRM1555C1H270J - Murata
C2
33 pF Capacitor Ceramic C0G 0402 5% 50 V
GRM1555C1H330J - Murata
D1
Very Low Capacitance ESD Protection
PESD0402-140 - Tyco Electronics
L1
68 nH Multilayer Inductor 0402 (SRF ~1 GHz)
LQG15HS68NJ02 - Murata
R1
10 k Resistor 0402 1% 0.063 W
RK73H1ETTP1002F - KOA Speer
J1
SMA Connector 50  Through Hole Jack
SMA6251A1-3GT50G-50 - Amphenol
C3
15 pF Capacitor Ceramic C0G 0402 5% 50 V
GRM1555C1H150J - Murata
L2
39 nH Multilayer Inductor 0402 (SRF ~1 GHz)
LQG15HN39NJ02 - Murata
C4
22 pF Capacitor Ceramic C0G 0402 5% 25 V
GRM1555C1H220J - Murata
L3
68 nH Multilayer Inductor 0402 (SRF ~1 GHz)
LQG15HS68NJ02 - Murata