u blox WIBEAR11N-DF1 WLAN & Bluetooth Module User Manual ELLA W1 Antenna TraceDesigns UBX 16016269

u-blox AG WLAN & Bluetooth Module ELLA W1 Antenna TraceDesigns UBX 16016269

Contents

ELLA-W1_Antenna TraceDesigns_(UBX-16016269)

ELLA-W1 Antenna trace designs
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ELLA-W1 Antenna trace designs
Topic :
ELLA-W1 Antenna trace designs
Doc.No:
UBX-16016269
Revision
R02
Date:
Name
Signature
Created
01-Jul-2016
Stefano Bianconi
sbia
Checked
01-Jul-2016
Igor Shevchenko
ishe
Released
06-Jul-2016
Daniel Dietterle
ddie
We reserve all rights in this document and in the information contained therein. Reproduction, use or disclosure to third parties without express authority is strictly forbidden. © 2016 u-blox AG
1 Scope
This document defines the essential specifications necessary to implement the ELLA-W1 antenna reference
designs. The information contained herein and its references should be sufficient to guide a skilled person in an
attempt to implement the design on a host carrier. It will provide the designer with PCB layout details and
expected performance specifications.
The document supports the four different PCB designs:
Two connector-based designs for the use of external antennas (one for each antenna pin of the module)
Two designs based on SMD antennas (one for each antenna pin of the module)
2 FCC/IC ID reference
Model1
IC ID
ELLA-W131
7738A-WB11NSF1
ELLA-W133
7738A-WB11NSF2
ELLA-W161
7738A-WB11NDF1
ELLA-W163
7738A-WB11NDF2
Table 1: FCC and IC IDs for different models of ELLA-W1 series
1
The FCC and IC IDs are the same for professional and automotive grade variants of each ELLA-W1 model.
ELLA-W1 Antenna trace designs
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3 General description
When using the ELLA-W1 together with this antenna reference design, the circuit trace layout must be made in
strict compliance with the instructions below.
All the components placed on each RF trace must be kept as indicated in the reference design, even if not used.
The PCB areas of unused reference designs must be flooded with ground.
Figure 1: Antenna Reference design embedded in a host carrier PCB
Reference
Description
1
Host carrier PCB (light green)
2
Antenna reference design (dark green)
1
2
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3.1 Floor plan and PCB stack-up
This section describes where the critical components are positioned on the reference design. It also presents the
stack-up of the four layers of the PCB.
Figure 2: ELLA-W1 antenna reference design
Reference
Description
3
SMD antenna
4
Antenna impedance matching network
5
Connectors for external antenna
6
Antenna coplanar microstrip, matched to 50 Ω
7
Top layer GND-plane
8
Antenna impedance matching network
9
SMD antenna
10
ELLA-W1 module
3
6
10
4
5
9
7
8
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3.2 PCB stack-up
The stack-up used in the reference design is specified in Table 2.
PCB Layer
Material
Thickness
Soldermask Top
Generic LPI Soldermask
25 µm
Top
Copper Foil
35 µm
Dielectric
Pre-preg 2x7628
360 µm
L2
Copper Foil
35 µm
Dielectric
Core
700 µm +/-10%
L3
Copper Foil
35 µm
Dielectric
Pre-preg 2x7628
360 µm
Bottom
Copper Foil
35 µm
Soldermask Bottom
Generic LPI Soldermask
25 µm
Table 2: Stack-up of EVK-ELLA-W1
3.2.1 RF trace specification
The 50 Ω coplanar micro-strip dimensions used in these reference designs are stated in Figure 2 and Table 3.
Figure 3: Coplanar micro-strip dimension specification
Item
Value
S
400 µm
W
600 µm
T
35 µm
H
360 µm
Table 3: Coplanar micro-strip specification
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3.3 Mechanical dimensions
The mechanical dimensions and position of the components are specified in Figure 3.
The layers beneath the ‘top layer’ have the same dimensions and are filled with ground. No RF traces are routed
in those layers.
Figure 4: Mechanical dimensions of EVK-ELLA-W1, top layer
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4 Reference designs for antenna pin 1
This section describes the available designs for the antenna pin 1 of the ELLA-W1 modules.
Figure 5: Reference schematic for antenna pin 1
4.1 Internal antenna
The reference design with internal antenna uses the SMD Antenova type A10194 dual-band antenna that is
connected to the module RF-port via a coplanar micro-strip transmission line.
4.1.1 Bill of materials
Reference
designator
Description
Manufacturer
P/N
A1
Antenna CHIP 2.45 & 5 GHz
Antenova
A10194
L1
IND, Multilayer Ceramic, 10nH, +/-5%, 300mA, SMD 0402
Johanson Technology
L-07C10NJV6ST
L2
IND, Multilayer Ceramic, 1nH, +/-0.3nH, 300mA, SMD 0402
Johanson Technology
L-07C1N0SV6T
C2
CAP, CER, 0.2pF, +/-0.1pF, C0G, 50V, SMD 0402
Johanson Technology
500R07S0R2BV4
R1
0 Ω resistor, 0402
Generic
-
R2
Do not Assembly
-
-
J7
Do Not Assembly
-
-
4.1.2 Antenna characteristics
Parameter
Low band
High band
Unit
Frequency Range
2.4 – 2.5
4.9 – 5.875
GHz
Peak Gain
1.8
4.1
dBi
VSWR
< 1.4:1
< 1.8:1
-
Efficiency
>75
>60
%
Polarisation
Linear
-
Radiation pattern
Omnidirectional
-
Temperature range
-40 to +85
°C
Impedance
50
Ω
Dimension
(L x W x H)
10.0 x 10.0 x 0.9
mm
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4.2 External antenna
The reference design with external antenna uses the micro coaxial connector that is connected to the external
antenna via a 50 Ω pigtail. See section 0 for a list of available external antennas.
4.2.1 Bill of materials
Reference
designator
Description
Manufacturer
P/N
A1
Do Not Assembly
-
-
L1
Do Not Assembly
-
-
L2
Do Not Assembly
-
-
C2
Do Not Assembly
-
-
R1
Do Not Assembly
-
-
R2
0 Ω resistor, 0402
Generic
-
J7
Coaxial Connector, 0 – 6 GHz, SMD
Hirose
U.FL-R-SMT-1(10)
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5 Reference designs for antenna pin 2
This section describes the available designs for the antenna pin 2 of the ELLA-W1 modules. Note that only ELLA-
W133 and ELLA-W163 use antenna pin 2, for Bluetooth transmission.
Figure 6: Reference schematic for antenna pin 2
5.1 Internal antenna
The reference design with internal antenna uses the SMD Johanson Technology type 2450AT45A100 antenna
that is connected to the module RF-port via a coplanar micro-strip transmission line.
5.1.1 Bill of materials
Reference
designator
Description
Manufacturer
P/N
A2
Antenna CHIP 2.4-2.5GHz
Johanson Technology
2450AT45A100
C3
CAP, CER, 2.2pF, +/-0.1pF, C0G, 50V, SMD 0402
Johanson Technology
500R07S2R2BV4
C4
CAP, CER, 1.8pF, +/-0.1pF, C0G, 50V, SMD 0402
Johanson Technology
500R07S1R8BV4
L3
IND, Multilayer Ceramic, 3.9nH, +/-0.3nH, 300mA, SMD 0402
Johanson Technology
L-07C3N9SV6T
R9
0 Ω resistor, 0402
Generic
-
R10
Do not Assembly
-
-
J8
Do Not Assembly
-
-
5.1.2 Antenna characteristics
Parameter
Low band
Unit
Frequency Range
2.4 – 2.5
GHz
Peak Gain
2.2
dBi
VSWR
< 2:1
-
Polarisation
Linear
-
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Parameter
Low band
Unit
Radiation pattern
Omnidirectional
-
Temperature range
-40 to +125
°C
Impedance
50
Ω
Dimension
(L x W x H)
9.5 x 2.0 x 1.2
mm
5.2 External antenna
The reference design with external antenna uses the micro coaxial connector that is connected to the external
antenna via a 50 Ω pigtail. See section 0 for a list of available external antennas.
5.2.1 Bill of materials
Reference
designator
Description
Manufacturer
P/N
A2
Do not Assembly
-
-
C3
Do Not Assembly
-
-
C4
Do not Assembly
-
-
L3
Do not Assembly
-
-
R9
Do Not Assembly
-
-
R10
0 Ω resistor, 0402
Generic
-
J8
Coaxial Connector, 0 – 6 GHz, SMD
Hirose
U.FL-R-SMT-1(10)

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