Fractus Geofind User manual

USER MANUAL
GeofindTM (FR05-S1-E-0-103)
Last updated on June 2017
© 2016 FRACTUS ANTENNAS, S.L. -1
GeofindTM (FR05-S1-E-0-103) –GPS (1575 MHz)
Fractus Antennas specializes in enabling effective mobile communications. Using Fractus
technology, we design and manufacture optimized antennas to make your wireless devices
more competitive. Our mission is to help our clients develop innovative products and accelerate
their time to market through our expertise in antenna design, testing and manufacturing.
GeofindTM
FR05-S1-E-0-103
Some Fractus Antennas products are
protected by Fractus patents.
All information contained within this
document is property of Fractus Antennas
and is subject to change without prior
notice. Information is provided “as is” and
without warranties. It is prohibited to copy
or reproduce this information without prior
approval.
Fractus Antennas is an ISO 9001:2008
certified company. All our antennas are
lead-free and RoHS compliant.

USER MANUAL
GeofindTM (FR05-S1-E-0-103)
Last updated on June 2017
© 2016 FRACTUS ANTENNAS, S.L. -2
INDEX OF CHAPTERS
1. ANTENNA DESCRIPTION.................................................................................................4
2. QUICK REFERENCE GUIDE.............................................................................................4
3. ELECTRICAL PERFORMANCE.........................................................................................5
4. MECHANICAL CHARACTERISTICS..................................................................................8
5. MATCHING NETWORK.....................................................................................................9
6. ASSEMBLY PROCESS....................................................................................................10
7. PACKAGING....................................................................................................................12

USER MANUAL
GeofindTM (FR05-S1-E-0-103)
Last updated on June 2017
© 2016 FRACTUS ANTENNAS, S.L. -3
TABLE OF CONTENTS
1. ANTENNA DESCRIPTION.................................................................................................4
2. QUICK REFERENCE GUIDE.............................................................................................4
3. ELECTRICAL PERFORMANCE.........................................................................................5
3.1. FRACTUS EVALUATION BOARD.............................................................................5
3.2. VSWR AND EFFICIENCY ..........................................................................................5
3.3. RADIATION PATTERNS, GAIN AND EFFICIENCY ...................................................6
3.4. CAPABILITIES AND MEASUREMENT SYSTEMS.....................................................7
4. MECHANICAL CHARACTERISTICS..................................................................................8
4.1. DIMENSIONS AND TOLERANCES............................................................................8
4.2. SPECIFICATIONS FOR THE INK...............................................................................8
4.3. ANTENNA FOOTPRINT (as used in the evaluation board).........................................9
5. MATCHING NETWORK.....................................................................................................9
6. ASSEMBLY PROCESS....................................................................................................10
7. PACKAGING....................................................................................................................12

USER MANUAL
GeofindTM (FR05-S1-E-0-103)
Last updated on June 2017
© 2016 FRACTUS ANTENNAS, S.L. -4
1. ANTENNA DESCRIPTION
The GeofindTM GPS (1575 MHz) Chip Antenna is specifically engineered for low cost, consumer
electronics mobile GPS devices.
The Geofind™ Chip Antenna uses space-filling properties of Fractus technology to minimise its
size and cost while maintaining a high radiation efficiency value. This monopole antenna
performs an omnidirectional radiation pattern, allowing it to work effectively regardless of the
position of the GPS device.
TOP
BOTTOM
Material: The GeofindTM antenna is built on glass epoxy substrate.
APPLICATIONS
Metering (Gas, Electricity, Water...)
RFID (UHF Tags, Readers...)
Sensors (Parking, Speed control,
Optics...)
Modules Zigbee
Gateways
BENEFITS
High efficiency and gain
Cost-effective
Small size
Easy to use (pick and place)
2. QUICK REFERENCE GUIDE
Technical Features
Frequency Range
1575 MHz
Antenna Efficiency
77.5 %
Peak Gain
1.5 dBi
Radiation Pattern
Omnidirectional
VSWR
< 1.5:1
Polarization
Linear
Weight (approx.)
0.2 g
Temperature
-40 to 85º C
Impedance
50 Ω
Dimensions (L x W x H)
10.0 mm x 10.0 mm x 0.9 mm
Table 1 –Technical Features. Measures from the evaluation board. See Figure 1and picture in page 6.
Please contact [e-mail] if you require additional information on antenna
integration or optimization on your PCB.
10.0 mm
10.0 mm
0.9 mm

USER MANUAL
GeofindTM (FR05-S1-E-0-103)
Last updated on June 2017
© 2016 FRACTUS ANTENNAS, S.L. -5
3. ELECTRICAL PERFORMANCE
3.1. FRACTUS EVALUATION BOARD
The Fractus Antennas configuration used in testing the GeofindTM Embedded Antenna is
displayed in Figure 1.
Measure
mm
A
60.0
B
30.0
C
71.0
D
17.0
E
35.0
Tolerance: ±0.2mm
Material: The evaluation board is
built on FR4 substrate. Thickness
is 1.0mm.
Figure 1 –GeofindTM Evaluation Board.
3.2. VSWR AND EFFICIENCY
VSWR (Voltage Standing Wave Ratio) and Total Efficiency versus Frequency (GHz).
Figure 2 –VSWR and Efficiency (%) vs. Frequency (GHz).

USER MANUAL
GeofindTM (FR05-S1-E-0-103)
Last updated on June 2017
© 2016 FRACTUS ANTENNAS, S.L. -6
3.3. RADIATION PATTERNS, GAIN AND EFFICIENCY
Orientation: Antenna in Plane ZY
Azimuth Cut θ= 90º Plane XY
Elevation Cut φ= 0º Plane XZ
Elevation Cut φ= 90º Plane YZ
Gain
1.5 dBi
Efficiency
77.5 %
Table 2 –Antenna Gain and Efficiency at 1575 MHz. Measures made in the evaluation board and in the
Satimo STARGATE 32 anechoic chamber. Data across the band is not significant in this case because
the bandwidth is very narrow.

USER MANUAL
GeofindTM (FR05-S1-E-0-103)
Last updated on June 2017
© 2016 FRACTUS ANTENNAS, S.L. -7
3.4. CAPABILITIES AND MEASUREMENT SYSTEMS
Fractus Antennas specializes in the design and manufacture of optimized antennas for wireless
applications, and with the provision of RF expertise to a wide range of clients. We offer turn-key
antenna products and antenna integration support to minimize your time requirements and
maximize return on investment throughout the product development process. We also provide
our clients with the opportunity to leverage our in-house testing and measurement facilities to
obtain accurate results quickly and efficiently.
Agilent E5071B
VSWR
&
S Parameters
Radiation
Pattern
&
Efficiency
SATIMO STARGATE 32
Anechoic chambers and full equipped in-house lab
2 2.5 3 3.5 4 4.5 5 5.5 6
-20
-18
-16
-14
-12
-10
-8
-6
-4
-2
0
Return Los s (dB)
Frequency (GHz)
Left Ante nna
Right Ante nna
Isolation
VSWR=2
2 2.5 3 3.5 4 4.5 5 5.5 6
-20
-18
-16
-14
-12
-10
-8
-6
-4
-2
0
Return Los s (dB)
Frequency (GHz)
Left Ante nna
Right Ante nna
Isolation
VSWR=2

USER MANUAL
GeofindTM (FR05-S1-E-0-103)
Last updated on June 2017
© 2016 FRACTUS ANTENNAS, S.L. -8
4. MECHANICAL CHARACTERISTICS
4.1. DIMENSIONS AND TOLERANCES
TOP
SIDE
BOTTOM
The black dot located on the top side of the antenna indicates the feed pad.
Measure
mm
Measure
mm
A
1.2 0.1
E
0.71 0.15
B
1.9 0.1
F
0.9 0.2
C
7.6 0.2
G
10.0 0.2
D
6.2 0.2
Figure 3 –Antenna Dimensions and Tolerances.
Fractus GeofindTM chip antenna is compliant with the restriction of the use of hazardous
substances (RoHS).
The RoHS certificate can be downloaded from www.fractusantennas.com.
4.2. SPECIFICATIONS FOR THE INK
Next figure shows the correct colors of the antenna:
Acceptable color range

USER MANUAL
GeofindTM (FR05-S1-E-0-103)
Last updated on June 2017
© 2016 FRACTUS ANTENNAS, S.L. -9
4.3. ANTENNA FOOTPRINT (as used in the evaluation board)
This antenna footprint applies for the reference evaluation board described on page 5 of this
User Manual.
Measure
mm
A
1.6
B
2.3
C
7.2
D
5.8
Tolerance: ±0.2 mm
Figure 4 –Antenna Footprint Details.
Other PCB form factors and configurations may require a different feeding configuration, feeding
line dimensions and clearance areas. If you require support for the integration of the antenna in
your design, please contact in[email protected]m.
5. MATCHING NETWORK
The specs of a Fractus Antennas standard antenna are measured in their evaluation board,
which is an ideal case. In a real design, components nearby the antenna, LCD’s, batteries,
covers, connectors, etc. affect the antenna performance. This is the reason why it is highly
recommended placing pads compatible with 0402 and 0603 SMD components for a PI matching
network as close as possible to the antenna feeding point. Do it in the ground plane area, not in
the clearance area. This is a degree of freedom to tune the antenna once the design is finished
and taking into account all elements of the system (batteries, displays, covers, etc.).

USER MANUAL
GeofindTM (FR05-S1-E-0-103)
Last updated on June 2017
© 2016 FRACTUS ANTENNAS, S.L. -10
6. ASSEMBLY PROCESS
Figure 5 shows the back and front view of the GeofindTM chip antenna, and indicates the
location of the feeding point and the mounting pads:
Figure 5 –Pads of the Fractus GeofindTM chip antenna.
As a surface mount device (SMD), this antenna is compatible with industry standard soldering
processes. The basic assembly procedure for this antenna is as follows:
1. Apply a solder paste to the pads of the PCB. Place the antenna on the board.
2. Perform a reflow process according to the temperature profile detailed in Table 3, ¡Error!
No se encuentra el origen de la referencia. on page 11.
3. After soldering the antenna to the circuit board, perform a cleaning process to remove any
residual flux. Fractus Antennas recommends conducting a visual inspection after the
cleaning process to verify that all reflux has been removed.
The drawing below shows the soldering details obtained after a correct assembly process:
Figure 6 –Soldering Details.
NOTE(*): Solder paste thickness after the assembly process will depend on the thickness of the
soldering stencil mask. A stencil thickness equal to or larger than 127 microns (5 mils) is
required.
12
4
3
Antenna
PCB
Solder Paste
Antenna
PCB
~ 0.1* mm
Mounting Pads (2, 3, 4): solder the antenna mounting pads to the
soldering pads on the PCB. These pads must NOT be grounded.
Feed Pad (1): the black circle on the top of the antenna indicates the position of the feed pad
in the bottom. Align the feed point with the feeding line on the PCB. See Figure 1.