Antennas for Wireless M2M Applications
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Product Specification DS-SRCW004 -1.1 revised 5 November 2015
Weii 2.4 GHz Ceramic Antenna
Part no: SRCW004 ceriiANT® Product Specification
2. Description
For use in all 2.4GHz applications. Compact design with simple integration and
implementation. Effective on varying GND plane sizes. Coexists well in multiple
antenna systems. Resistant to de-tuning effects means devices can work well in
different environments. Ideal antenna choice for small wearable devices.
3. Applications:
Small wearable devices
Headsets
Medical devices
PNDs
Dongles
Sensors
4. Quick Specs:
Part Number
SRCW004
Frequency
2.4 – 2.5GHz
Operating Temp
-40°C to125°C
Antenna Dimensions
1.0 x 0.5 x 0.5
Antenna Clearance Area
9mm x 4.5mm
Average Efficiency
70%
1. Features:
2.4GHz applications
Bluetooth, WiFi, Zigbee, ISM.
Ultra small ceramic chip solution.
High Efficiency.
SMD mounted.
Resistant to de-tuning.
Omni-directional
RoHS compliant
Antennas for Wireless M2M Applications
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Product Specification DS-SRCW004 -1.1 revised 5 November 2015
5. Mechanical Specifications
Product Name
Weii 2.4GHz Chip Antenna
Part Number
SRCW004
Frequency Range
2.4 - 2.5 GHz
Polarization
Linear
Operating Temperature
-40 ºC to +120 ºC
Weight
<0.015 g
Impedance with matching
50 Ω
Antenna Type
SMD
Dimensions
1.0 x 0.5 x 0.5 (mm)
Footprint Size
9.0 x 4.5 (mm)
6. RF Specifications
Typical Performance
Peak Gain
2.5 dBi
Average Average Gain
-1.5 dBi
Average Efficiency
70%
Maximum Return Loss
<-10 dB
Maximum VSWR
1.6:1
Data measured on Antenovas reference PCB.
Data given for the 2.402 – 2.480 GHz frequency range
Antennas for Wireless M2M Applications
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Product Specification DS-SRCW004 -1.1 revised 5 November 2015
7. RF Performance
7-1 Return Loss
7-2 VSWR
Data measured on Antenovas reference PCB.
Data given for the 2.402 – 2.480 GHz frequency range
2300 2400 2500 2600
-25
-20
-15
-10
-5
0
5
[MHz]
[dB] Atyune
1
2
MARKERS: MHz dB
TRAC E23.S1P - S11
1: 2402
2: 2480
-15.81
-12.90
2300 2400 2500 2600
1
2
3
4
5
6
7
8
9
10
[MHz]
[] Atyune
12
MARKERS: MHz
TRACE23.S1P - S11
1: 2402
2: 2480
1.39
1.59
Antennas for Wireless M2M Applications
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Product Specification DS-SRCW004 -1.1 revised 5 November 2015
7-3 Radiation Pattern
3D pattern at 2.45GHz
Drag to rotate pattern by using Adobe Reader
Data measured on Antenovas reference PCB.
Data given for the 2.402 – 2.480 GHz frequency range
dBi
Antennas for Wireless M2M Applications
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Product Specification DS-SRCW004 -1.1 revised 5 November 2015
8. Antenna Dimensions
9. Antenna footprint
* CAD files of the antenna footprint are available at
www.antenova-m2m.com.
L
W
H
Length
Width
Height
1.0
±
0.1
0.5
±
0.15
0.5
±
0.1
L
W
P
Length
Width
Pitch
0.6
±
0.1
0.5
±
0.15
1.0
±
0.1
L
All dimensions in mm
P
W
All dimensions in mm
PCB copper pads
Antennas for Wireless M2M Applications
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Product Specification DS-SRCW004 -1.1 revised 5 November 2015
9-1 Schematic
The circuit required for the antenna is shown here. The RF feed connection and GND
connections are critical to the function of the antenna, and must be followed as shown.
This circuit can be used for the circuit capture of the host PCB.
A1
Antenna
R1
Tuning Component (Default = 0R Resistor)
Port
A1
R1
Pi Network
To RF front end
Antennas for Wireless M2M Applications
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Product Specification DS-SRCW004 -1.1 revised 5 November 2015
9-2 Antenna host PCB Layout
The copper tracks etched on the PCB form an integral part of the antenna, and any
deviation from the advised layout shown below will result in a loss in the antenna
performance. It is best that the copper track layout is imported from CAD files which are
available from Antenova M2M on request. Please contact info@antenova-m2m.com for
further details.
7-3
Antenna
patterns
PCB layout without shown without solder mask for illustration purpose.
only.
Antennas for Wireless M2M Applications
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Product Specification DS-SRCW004 -1.1 revised 5 November 2015
10 Electrical interface
10-1 Transmission Line
All transmission lines should be designed to have a characteristic impedance of
50
Ω
• 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 track so the
characteristic impedance of the coplanar transmission line is 50
Ω
.
Antennas for Wireless M2M Applications
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Product Specification DS-SRCW004 -1.1 revised 5 November 2015
10-2 Matching circuit
The antenna requires a matching circuit that must be optimized for each product.
The matching circuit will require up to three components (0402 size), and an
additional tuning element is also required (0402 size) the following pad layout
should be designed into the device so the correct circuit can be installed.
Note: The tuning component by default is a 0402 zero ohm resistor.
In addition to the matching circuit, a separate DC blocking capacitor will also be
required between the radio and the antenna matching circuit.
Note: The component values for the matching circuit will vary depending
on the size of the PCB and surrounding components. The impedance of
the antenna should be measured before selecting suitable matching
components. Antenova M2M offers this service on request. Contact
techsupport@antenova-m2m.com or further information.
Port
A1
R1
A1
R1
Antennas for Wireless M2M Applications
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Product Specification DS-SRCW004 -1.1 revised 5 November 2015
10-3 Host PCB integration guidelines
Placement
The antenna should be placed in the best suited position to effectively radiate.
Whichever the PCB size used, the most ideal position is along the longest edge of the
PCB at the centre of that edge.
Antenna PCB
Layout
5
Where the centre is not a viable option the antenna can be placed offset on the PCB to
within the limits shown below.
Antenna placed equal distance from either side
≥ 7mm
≥ 7mm
Antennas for Wireless M2M Applications
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Product Specification DS-SRCW004 -1.1 revised 5 November 2015
Minimum recommended host PCB size
The recommended minimum PCB size for the antenna is defined by the PCB edge the
antenna is to be placed. For good performance to be maintained this minimum size is
recommended to be no less than 30mm in length. Below shows the change in performance
when the ground plane size is reduced.
60mm
40mm
30mm
30 x 30mm
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Product Specification DS-SRCW004 -1.1 revised 5 November 2015
MIMO Applications example
This ceramic antenna is ideal for applications requiring multiple antennas for MIMO
systems. In this example two antennas are shown mounted on Antenova evaluation PCB
and represents a good example when applying this antenna within a MIMO system.
Two antennas placed perpendicular to each other at a distance of 28mm from antenna
clearance edges. Both antennas were optimised and matched to the same frequency.
Antenna 1
Antenna 2
30mm
0300 600 900 1200 1500 1800 2100 2400 2700 3000
-80
-70
-60
-50
-40
-30
-20
-10
0
10
[MHz]
[dB] Atyune
12
MARKERS: MHz dB
Ant1 to Ant2_Isolation.S2P - S11
1: 2400
2: 2500
-17.96
-18.18
15.7mm
m
Antennas for Wireless M2M Applications
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Product Specification DS-SRCW004 -1.1 revised 5 November 2015
MIMO Applications example
The radiation patterns for the MIMO configuration.
3D patterns at 2.45GHz
Drag to rotate pattern by using Adobe Reader
Antenna 1
Antenna 2
Antenna 1
Antenna 2
Antennas for Wireless M2M Applications
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Product Specification DS-SRCW004 -1.1 revised 5 November 2015
Wearable device example
Wearable devices require the use of small PCB’s with limited clearance due to components
and close proximity to the human body. Some guidelines to follow when designing small
devices are illustrated in the example below.
1. Antenna clearance must be maintained above and below, with exception of the human
body making contact with the external case.
2. Components such as LCD or Battery to keep clear of antenna section.
3. Place antenna on longest PCB edge, in this case close to edge of the circular PCB.
4. Height from human body should be greater than 4mm to minimise losses (>4mm)
5. Outer case should not contain metal close to the antenna where possible. Certain
metalized coatings are possible where they do not conduct effectively.
2
LCD
Wrist strap
Plastic case
SRCW004
1
Wrist mounted wearable example for Bluetooth application
Antennas for Wireless M2M Applications
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Product Specification DS-SRCW004 -1.1 revised 5 November 2015
11. Evaluation PCB
The reference board has been designed for evaluation purposes of SRCW004 2.4 GHz
and it includes a SMA female connector.
SRCW004 Evaluation Board
To order a reference board contact sales@antenova-m2m.com.
60mm
37mm
Antennas for Wireless M2M Applications
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Product Specification DS-SRCW004 -1.1 revised 5 November 2015
12. Soldering
This antenna is suitable for lead free soldering.
The reflow profile should be adjusted to suit the device, oven and solder paste, while
observing the following conditions:
- The maximum temperature should not exceed 240 ºC
- However for lead free soldering, a maximum temperature of 255 ºC for no more than
20 seconds is permitted.
- The antenna should not be exposed to temperatures exceeding 120 ºC more than 3
times during the soldering process.
13. 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.
14. Packaging
14-1 Optimal storage conditions for packaged reels
Temperature
-10ºC to 40ºC
Humidity
Less than 75% RH
Shelf Life
24 Months
Storage place
Away from corrosive gas and direct sunlight
Reels should be stored in unopened sealed
manufacturer’s plastic packaging.
Packaging
Note: Storage of open reels of antennas is not recommended due to possible oxidization of pads
on antennas. If short term storage is necessary, then it is highly recommended that the bag
containing the antenna reel is re-sealed and stored in like storage conditions as in above table.
The shelf life of the antenna is two years, providing the factory seal on the package has not been
broken.
Antennas for Wireless M2M Applications
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Product Specification DS-SRCW004 -1.1 revised 5 November 2015
14-2 Tape Dimensions
All dimensions in mm
Do
E1
E2
F
G
Po
1.50±0.1
1.75±0.1
6.25±0.1
3.50±0.05
0.75 min
4.00±0.1
P1
P2
T
T1
W
Ao & Bo
4.00±0.1
2.00±0.05
1.10 max
0.1 max
8.00±0.3
See note 1
Notes:
The cavity defined by Ao, Bo, and T shall be configured to provide sufficient clearance
surrounding the antenna so that:
a) The component does not protrude beyond either surface of the carrier tape.
b) The component can be removed from the cavity in a vertical direction without
mechanical restriction after the top cover tape has been removed.
c) Rotation of the component is limited to 20° maximum.
d) Lateral movement of the component is restricted to 0.5mm maximum.
Antennas for Wireless M2M Applications
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Product Specification DS-SRCW004 -1.1 revised 5 November 2015
14-3 Reel dimensions
All dimensions in mm
A
B
C
D
W1
W2
330 (max)
1.5 (min)
13.0±0.5
20.2 (min)
8.40 +1.5
14.4 (max)
Quantity
Leading Space
Trailing Space
10000 pcs / reel
16 blank antenna
holders
24 blank antenna
holders
Antennas for Wireless M2M Applications
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Product Specification DS-SRCW004 -1.1 revised 5 November 2015
Width
W
Breadth
B
Thickness
H
340 mm
350 mm
47 mm
14-4 Box dimensions
14-5 Bag properties
Reels are supplied in protective plastic packaging.
14-6 Reel label information
60.00 mm
90.00 mm
Antenova Limited
Antenova Asia Ltd
4F, No 324, Sec 1 Nei-Hu Road
Nei-Hu District, Taipei 11493, Taiwan ROC
info@antenova.com / www.antenova-m2m.com
Description: Weii
Part number: SRCW004
Quantity: 10,000 pieces
Date Code:
Manufacturer’s code number:
ceriiANT®
Antennas for Wireless M2M Applications
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Product Specification DS-SRCW004 -1.1 revised 5 November 2015
Release Date 20 May 2015
www.antenova-m2m.com
Corporate Headquarters
Antenova Ltd.
North America Headquarters
Antenova Ltd.
Asia Headquarters
Antenova Asia Ltd.
2nd Floor, Titan House
3 Bishop Square
Hatfield
AL10 9NA
100 Brush Creek Road, Suite 103
Santa Rosa
California, 95404
USA
4F, No. 324, Sec. 1, Nei-Hu Road
Nei-Hu District
Taipei 11493
Taiwan, ROC
Tel: +44 1223 810600
Email: sales@antenova-m2m.com
Tel: +1 707 890 5202
Email: sales@antenova-m2m.com
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®, 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 print. Antenova does
not
warrant the accuracy or completeness of the information, text, graphics or other items contained
within
these
information. Antenova further assumes no responsibility for the use of this information, and all
such
information shall be entirely at the user’s
risk.