Antennas for Wireless M2M Applications
Product Specification SRF2I019-PS-1.2 Page 1
1. Features
Antenna for ISM and LoRa® bands (863 – 870MHz and 902 - 928MHz)
Maintains high performance within device: DFI (Designed For Integration)
1.13mm diameter RF cable with IPEX MHF connector
Self-Adhesive mounted
Quick integration minimizes design cycle
High performance
Available 3 standard cable lengths
2. Description
Montana is intended for use with ISM and LoRa®applications. A flexible antenna with
cable enables direct connection to the host PCB. Simple integration with plug and
play simplicity. This product specification shows the performance of the antenna to
cover a typical dual band ISM from 863 – 928MHz.
3. Applications
Remote Sensors
Smart meters
Medical devices
Monitoring equipment
Automotive devices
LoRa® Gateway/Routers
LoRa® Wireless Nodes
Montana ISM Antenna
Part No. SRF2I019 flexiiANT ® Product Specification
Montana
Part No. SRF2I019
Antennas for Wireless M2M Applications
Product Specification SRF2I019-PS-1.2 Page 2
4. Part Number
Montana: SRF2I019-xxx
Note. -xxx refers to cable length option:
5. General Data
6. RF Characteristics
Part Number
Cable Length
SRF2I019-100
100mm
SRF2I019-150
150mm
SRF2I019-200
200mm
Product name
Montana
Part Number
SRF2I019
Frequency
863-928MHz
Polarization
Linear
Operating temperature
-40°C to +85°C
Environmental condition test
ISO 16750-4 5.1.1 / 5.1.2
Impedance with matching
50 Ω
Weight
< 0.5 g
Antenna Assembly type
FPC Self-adhesive
Dimensions (Antenna)
232 x pi x 0.15 (mm)
Cable length
100 / 150 / 200 (mm)
Connection
MHF IPEX
Typical performance
Conditions
Peak gain
1.9dBi
Average gain
-2.4dBi
Average efficiency
>50%
Maximum return loss
<-11dB
Maximum VSWR
1.70:1
All data measured in a loaded
condition adhered to a plastic
carrier free space.
Montana
Part No. SRF2I019
Antennas for Wireless M2M Applications
Product Specification SRF2I019-PS-1.2 Page 3
7. RF Performance
7.1 Return Loss
7.2 VSWR
600 700 800 900 1000 1100 1200
-35
-30
-25
-20
-15
-10
-5
0
5
[MHz]
[dB] Atyune
1
2
3
4
MARKERS: MHz dB MHz dB
RD8019.S1P - S11
1: 863
2: 870
-11.55
-13.19
3: 902
4: 928
-27.40
-12.95
600 700 800 900 1000 1100 1200
1
2
3
4
5
6
7
8
9
10
[MHz]
[] Atyune
12
3
4
MARKERS: MHz MHz
RD8019.S1P - S11
1: 863
2: 870
1.72
1.56
3: 902
4: 928
1.09
1.58
Montana
Part No. SRF2I019
Antennas for Wireless M2M Applications
Product Specification SRF2I019-PS-1.2 Page 4
7.3 Antenna patterns
7.3.1 863 – 870 MHz
3D pattern at 865MHz
Drag to rotate pattern and PCB by using Adobe Reader
(Click to Activate)
Montana
Part No. SRF2I019
Antennas for Wireless M2M Applications
Product Specification SRF2I019-PS-1.2 Page 5
7.3.2 902 - 928 MHz
3D pattern at 915MHz
Drag to rotate pattern and PCB by using Adobe Reader
(Click to Activate)
Montana
Part No. SRF2I019
Antennas for Wireless M2M Applications
Product Specification SRF2I019-PS-1.2 Page 6
8. Antenna Dimensions
8.1 Dimensions FPC section
All dimensions in mm
8.2 Dimensions assembled
ø
T
Diameter
Thickness
45.0 ±0.2 (mm)
0.15 (mm) nominal
SRF2I19-100
SRF2I019-150
SRF2I019-200
L
L
L
101 ±2.0 (mm)
151 ±2.0 (mm)
201 ±2.0 (mm)
ø
9.5
12.4
13.4
2 Holes = 1.5mm ø (diameter)
L
12.4
Montana
Part No. SRF2I019
Antennas for Wireless M2M Applications
Product Specification SRF2I019-PS-1.2 Page 7
8.3 IPEX Connector
All dimensions in mm
8.4 Assembly
I-PEX
Material
Copper Alloy
Plating
Ag
Front
Side
Back
5.0
3.0
I-PEX Connector
1.13mm ø Cable
FPC
Montana
Part No. SRF2I019
Antennas for Wireless M2M Applications
Product Specification SRF2I019-PS-1.2 Page 8
9. Electrical Interface
9.1 Host Interface
The host PCB requires the mating connector which is the IPEX MHF (UFL)
receptacle. The location should be close to the chip/modules pin for the RF. Any
feed from this receptacle should be maintained at 50Ω impedance.
9.2 Transmission Line
All transmission lines should be designed to have a characteristic impedance of 50Ω.
• The length of the transmission lines should be kept to a minimum
• Any other parts of the RF system like transceivers, power amplifiers, etc, should
also be designed to have an impedance of 50 Ω
Once the material for the PCB has been chosen (PCB thickness and dielectric
constant), a coplanar transmission line can easily be designed using any of the
commercial software packages for transmission line design. For the chosen PCB
thickness, copper thickness and substrate dielectric constant, the program will
calculate the appropriate transmission line width and gaps on either side of the feed.
A DC blocking capacitor should be placed in line to protect the RF front end.
10. Mechanical Fixing
The antenna uses 3M 468MP adhesive on the back side of the FPC. The antenna
has a easy access split line to peel off to reveal the adhesive side. It is designed for
a one time fix to a clean smooth surface.
FPC back side
Split line for
easy peel
Montana
Part No. SRF2I019
Antennas for Wireless M2M Applications
Product Specification SRF2I019-PS-1.2 Page 9
11.0 Antenna Integration Guide
11.1 Placement
For placing the FPC antenna within a device, the host PCB size is not a factor as
with PCB mounted antennas. However, placement still needs to follow some basic
rules, as any antenna is sensitive to its environment.
The guide below shows six spatial directions. The antenna FPC section should
ideally maintain a minimum of three directions free from obstructions so as to be able
to operate effectively. The other directions will have obstacles in their paths, these
directions still require a minimum clearance. These minimum clearances are further
defined in this section. The plastic case is not included in this, only metal
objects/components that will obstruct or come in close proximity to the antenna.
Six spatial directions relative to FPC
Example with 5 spatial directions clear
PCB
FPC
Montana
Part No. SRF2I019
Antennas for Wireless M2M Applications
Product Specification SRF2I019-PS-1.2 Page 10
11.2 Orientation of FPC
The orientation of the FPC with respect to the host PCB should be defined
depending on the unit. The proximity of the GND will have an influence on the
antenna so the PCB location relative to the antenna should be considered.
The orientation the FPC will normally be placed in one of three of the following
options for orientation. In each option a distance (d) is the critical dimension to
consider. Below shows the minimum value of (d) for each. Other obstructions may
increase this dimension.
1) Vertical mounted
1) Co-planar to PCB
2) Planar to PCB (Same plane)
d ≥ 5mm
PCB
Cable +Connector
FPC
d ≥ 15mm
d ≥ 5mm
Montana
Part No. SRF2I019
Antennas for Wireless M2M Applications
Product Specification SRF2I019-PS-1.2 Page 11
11.3 Device Integration example
An example of integration within a device is shown below. The device contains the
major components along with the device outer case. The FPC is shown adhered to
the inside of the plastic housing of the device. The length of the cable is sufficient to
allow ease of assembly when produced (SRF2I019-100)
The FPC was placed parallel relative to the PCB. The FPC is kept a maximised
height above the PCB to ensure it is above the minimum clearance of ≥15mm. This
example shows the FPC 20mm above the PCB.
For co-planar placement
relative to PCB d=10mm
(min ≥15mm)
Montana
Part No. SRF2I019
Antennas for Wireless M2M Applications
Product Specification SRF2I019-PS-1.2 Page 12
12. Hazardous Material Regulation Conformance
The antenna has been tested to conform to RoHS requirements. A certificate of
conformance is available from Antenova M2M’s website.
13. Packaging
The antennas are stored in individual plastic (PE) bags. Then stored within a second
bag of 10pcs.
Single antenna per bag 10 units per second bag (Labelled)
13.1 Optimal Storage Conditions
Temperature
-10ºC to 40ºC
Humidity
Less than 75% RH
Shelf life
18 Months
Storage place
Away from corrosive gas and direct sunlight
Packaging
Antennas should be stored in unopened sealed
manufacturer’s plastic packaging.
The shelf life of the antenna is 18 months provided the bag of 10 pieces remains
factory-sealed.
Montana
Part No. SRF2I019
Antennas for Wireless M2M Applications
Product Specification SRF2I019-PS-1.2 Page 13
13.2 Label Information
50.00mm
Antenova Limited
Antenova Asia Ltd
4F, No 324, Sec 1, Nei-Hu Road
Nei-Hu District, Taipei 11493, Taiwan, ROC
info@antenova-m2m.com / www.antenova-m2m.com
Description: Montana
Part number: SRF2I019
Quantity: 10
Date Code: YYWW
Manufacturer’s code number: flexiiANT®
60.00m
m
Montana
Part No. SRF2I019
Antennas for Wireless M2M Applications
Product Specification SRF2I019-PS-1.2 Released November 2015, revised June 2016 Page 14
www.antenova-m2m.com
Corporate Headquarters
Antenova Limited
2nd Floor Titan Court
3 Bishop Square
Hatfield
AL10 9NA
UK
Tel: +44 1223 810600
Email: sales@antenova-m2m.com
North America Headquarters
Antenova Limited
100 Brush Creek Road, Suite 103
Santa Rosa
California 95404
USA
Tel: +1 707 890 5202
Email: sales@antenova-m2m.com
Asia Headquarters
Antenova Asia Limited
4F, No. 324, Sec. 1, Nei-Hu Road
Nei-Hu District
Taipei 11493
Taiwan, ROC
Tel: +886 (0) 2 8797 8630
Fax: +886 (0) 2 8797 6890
Email: sales@antenova-m2m.com
Copyright® Antenova Ltd. All Rights Reserved. Antenova ®, Antenova M2M ®, gigaNOVA ® the Antenova
product family names and the Antenova and Antenova M2M logos are trademarks and/or registered trademarks
of Antenova Ltd. Any other names and/or trademarks belong to their respective companies.
The materials provided herein are believed to be reliable and correct at the time of printing. Antenova does not
warrant the accuracy or completeness of the information, text, graphics or other items contained within this
information. Antenova further assumes no responsibility for the use of this information, and all such information
shall be entirely at the user’s risk.
