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Geofind
User Manual
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Fractus Geofind, FR05-S1-E-0-103 User Manual

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Page 1
USER MANUAL
GeofindTM (FR05-S1-E-0-103)
Last updated on June 2017
Geofind
TM
(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.
Page 2
USER MANUAL
GeofindTM (FR05-S1-E-0-103)
Last updated on June 2017
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
Page 3
USER MANUAL
GeofindTM (FR05-S1-E-0-103)
Last updated on June 2017
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
Page 4
USER MANUAL
GeofindTM (FR05-S1-E-0-103)
Last updated on June 2017
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 info@fractusantennas.com if you require additional information on antenna integration or optimization on your PCB.
10.0 mm
10.0 mm
0.9 mm
Page 5
USER MANUAL
GeofindTM (FR05-S1-E-0-103)
Last updated on June 2017
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).
Page 6
USER MANUAL
GeofindTM (FR05-S1-E-0-103)
Last updated on June 2017
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.
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USER MANUAL
GeofindTM (FR05-S1-E-0-103)
Last updated on June 2017
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 Lo ss (dB)
Freque nc y (GHz)
Left Ante nna Right An tenn a Isolatio n
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 Lo ss (dB)
Freque nc y (GHz)
Left Ante nna Right An tenn a Isolatio n
VSWR=2
Page 8
USER MANUAL
GeofindTM (FR05-S1-E-0-103)
Last updated on June 2017
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
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USER MANUAL
GeofindTM (FR05-S1-E-0-103)
Last updated on June 2017
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 info@fractusantennas.com.
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.).
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USER MANUAL
GeofindTM (FR05-S1-E-0-103)
Last updated on June 2017
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.
1
2
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.
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USER MANUAL
GeofindTM (FR05-S1-E-0-103)
Last updated on June 2017
The Fractus GeofindTM antenna should be assembled following either Sn-Pb or Pb-free assembly processes. According to the Standard IPC/JEDEC J-STD-020C, the temperature profile suggested is as follows:
Phase
Profile features
Pb-Free Assembly (SnAgCu)
RAMP-UP
Avg. Ramp-up Rate (Tsmax to Tp)
3 ºC / second (max.)
PREHEAT
- Temperature Min (Tsmin)
- Temperature Max (Tsmax)
- Time (tsmin to tsmax)
150 ºC 200 ºC 60-180 seconds
REFLOW
- Temperature (TL)
- Total Time above TL (tL)
217 ºC 60-150 seconds
PEAK
- Temperature (Tp)
- Time (tp)
260 ºC 20-40 seconds
RAMP-DOWN
Rate
6 ºC/second max
Time from 25 ºC to Peak Temperature
8 minutes max
Table 3 – Recommended soldering temperatures.
Next graphic shows temperature profile (grey zone) for the antenna assembly process in reflow ovens.
Figure 7 – Temperature profile.
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USER MANUAL
GeofindTM (FR05-S1-E-0-103)
Last updated on June 2017
7. PACKAGING
The Fractus Geofind™ chip antenna is available in tape and reel packaging.
Measure
mm
W
16.0 ± 0.3
A0
10.5 ± 0.1
B0
10.5 ± 0.1
K0
1.5 ± 0.1
B1
11.1 ± 0.1
D
2.0 ± 0.1
D1
2.0 ± 0.1
Wmax
16.3
E
1.7 ± 0.1
F
7.5 ± 0.1
K
1.8 ± 0.1
P
12.0 ± 0.1
P0
4.0 ± 0.1
P2
2.0 ± 0.1
Figure 8 – Tape Dimensions and Tolerances.
Figure 9 – Images of the tape.
Measure
mm
A max
330.0 ± 1.0
G
17.5 ± 0.2
t max
21.5 ± 0.2
Reel Capacity: 2500 antennas
Figure 10 – Reel Dimensions and Capacity.
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