2.
4/5GHz OnBoard WLAN SMD - Antenna
PRO-OB-536 Request Samples Check Inventory
14.20 x 6.60 x 2.50 mm
RoHS/RoHS II Compliant
MSL Level = 1
Features Applications
• Compact • 2.4/5 GHz
• Profile of 2.5 mm o Wi-Fi/BT/BLE/ZigBee/ISM
• Mixed Linear Polarization • IoT, M2M
• Peak Gain of 2.7 dBi • Telemetry
• Efficiency > 44% • Wireless Remote Control
• Surface Mount • Personal Area Networks (PAN)
• Durable-Shelf life of up to 10 years • Industrial/Commercial Equipment
Product Image
5101 Hidden Creek Ln Spicewood TX 78669 ABRACON IS
Phone: 512-371-6159 | Fax: 512-351-8858 REVISED: ISO9001-2015
For terms and conditions of sales, please visit:
CERTIFIED
www.abracon.com
2.4/5GHz OnBoard WLAN SMD - Antenna
PRO-OB-536 Request Samples Check Inventory
14.20 x 6.60 x 2.50 mm
RoHS/RoHS II Compliant
MSL Level = 1
Electrical Specification
Parameter Specification Unit
Operating Frequency 2400 - 2500 5150 - 5850
MHz
Center Frequency 2450 5500
Return Loss ˂ -6.2 ˂ -3.2 dB
Polarization Mixed Linear -
Peak Gain 1.7 2.7 dBi
Efficiency > 51 > 44 %
Impedance 50 Ω
Note: All measurements were conducted on the evaluation board in free space. Performance will vary depending on
the ground plane, application, and environment.
Mechanical Specification
Parameter Specification
Antenna Dimension 14.20 x 6.60 x 2.50 mm
Evaluation board Dimension 47 x 17 mm
Mounting Type Surface Mount
Environmental Specification
Parameter Specification
Operating Temperature
-40°C to +125°C
Storage Temperature
Maximum Temperature 400°C
Yes
RoHS Compliance
Compliant with EU directive 2011/65/EU and 2015/863
Shelf life 10 years
MSL Level 1, unlimited
Immunity to vibrations IEC/EN 60068-2-6, Fc test
Mechanical resistance
Immunity to shock IEC/EN 60068-2-27, Ea test
Note: •The product has been tested according to the standard IEC 60721-3-5 – Class 5M3 (road vehicles in areas
without well-developed road systems, light-weighted vehicles, tracked vehicles and self-propelled machines).
5101 Hidden Creek Ln Spicewood TX 78669 ABRACON IS
Phone: 512-371-6159 | Fax: 512-351-8858 REVISED: ISO9001-2015
For terms and conditions of sales, please visit:
CERTIFIED
www.abracon.com
2.4/5GHz OnBoard WLAN SMD - Antenna
PRO-OB-536 Request Samples Check Inventory
14.20 x 6.60 x 2.50 mm
RoHS/RoHS II Compliant
MSL Level = 1
Product Dimensions
Unit : mm
Antenna pins and keep-out block
Unit : mm
5101 Hidden Creek Ln Spicewood TX 78669 ABRACON IS
Phone: 512-371-6159 | Fax: 512-351-8858 REVISED: ISO9001-2015
For terms and conditions of sales, please visit:
CERTIFIED
www.abracon.com
2.4/5GHz OnBoard WLAN SMD - Antenna
PRO-OB-536 Request Samples Check Inventory
14.20 x 6.60 x 2.50 mm
RoHS/RoHS II Compliant
MSL Level = 1
PCB layout and antenna pin numbering
The antenna uses PIFA technology and should thus be mounted on a ground plane. If there are several layers in the
PCB, there is an advantage to add vias for smooth interconnection of the ground areas to avoid splits in the ground
plane. It is also important that there is a ground clearance around the NC pads and the RF feed pad, through all layers
of the PCB. It is recommended to implement a matching network to optimize the antenna impedance in your
application. The components can be positioned under the antenna. See recommendations in the figures below.
Pin configuration PCB Layout (from evaluation board)
Distance between pads Pad dimensions, size of Clearance through all layers.
pads 2, 3 & 5 are identical Size of pads 2, 3 & 5 are identical
Unit: mm
5101 Hidden Creek Ln Spicewood TX 78669 ABRACON IS
Phone: 512-371-6159 | Fax: 512-351-8858 REVISED: ISO9001-2015
For terms and conditions of sales, please visit:
CERTIFIED
www.abracon.com
2.4/5GHz OnBoard WLAN SMD - Antenna
PRO-OB-536 Request Samples Check Inventory
14.20 x 6.60 x 2.50 mm
RoHS/RoHS II Compliant
MSL Level = 1
Measurement Setup
The antenna measurements were all done in free space with the OnBoard WLAN SMD evaluation board (PRO-EB-
550) that has a PCB size of 47 x 17 mm.
5101 Hidden Creek Ln Spicewood TX 78669 ABRACON IS
Phone: 512-371-6159 | Fax: 512-351-8858 REVISED: ISO9001-2015
For terms and conditions of sales, please visit:
CERTIFIED
www.abracon.com
2.4/5GHz OnBoard WLAN SMD - Antenna
PRO-OB-536 Request Samples Check Inventory
14.20 x 6.60 x 2.50 mm
RoHS/RoHS II Compliant
MSL Level = 1
Reflection Characteristics – Return Loss
Total Radiation Efficiency Maximum Radiation Gain
5101 Hidden Creek Ln Spicewood TX 78669 ABRACON IS
Phone: 512-371-6159 | Fax: 512-351-8858 REVISED: ISO9001-2015
For terms and conditions of sales, please visit:
CERTIFIED
www.abracon.com
2.4/5GHz OnBoard WLAN SMD - Antenna
PRO-OB-536 Request Samples Check Inventory
14.20 x 6.60 x 2.50 mm
RoHS/RoHS II Compliant
MSL Level = 1
Radiation Characteristics – 2D Pattern (2450 MHz)
VP: Vertical Polarization
HP: Horisontal Polarization Unit: dBi
5101 Hidden Creek Ln Spicewood TX 78669 ABRACON IS
Phone: 512-371-6159 | Fax: 512-351-8858 REVISED: ISO9001-2015
For terms and conditions of sales, please visit:
CERTIFIED
www.abracon.com
2.4/5GHz OnBoard WLAN SMD - Antenna
PRO-OB-536 Request Samples Check Inventory
14.20 x 6.60 x 2.50 mm
RoHS/RoHS II Compliant
MSL Level = 1
Radiation Characteristics – 2D Pattern (5150 MHz)
VP: Vertical Polarization
HP: Horisontal Polarization Unit: dBi
5101 Hidden Creek Ln Spicewood TX 78669 ABRACON IS
Phone: 512-371-6159 | Fax: 512-351-8858 REVISED: ISO9001-2015
For terms and conditions of sales, please visit:
CERTIFIED
www.abracon.com
2.4/5GHz OnBoard WLAN SMD - Antenna
PRO-OB-536 Request Samples Check Inventory
14.20 x 6.60 x 2.50 mm
RoHS/RoHS II Compliant
MSL Level = 1
Radiation Characteristics – 2D Pattern (5850 MHz)
VP: Vertical Polarization
HP: Horisontal Polarization Unit: dBi
5101 Hidden Creek Ln Spicewood TX 78669 ABRACON IS
Phone: 512-371-6159 | Fax: 512-351-8858 REVISED: ISO9001-2015
For terms and conditions of sales, please visit:
CERTIFIED
www.abracon.com
2.4/5GHz OnBoard WLAN SMD - Antenna
PRO-OB-536 Request Samples Check Inventory
14.20 x 6.60 x 2.50 mm
RoHS/RoHS II Compliant
MSL Level = 1
Evaluation Board Outline & Matching Circuit
The evaluation board (PRO-EB-550) is developed to simplify antenna testing and evaluation. It has an arbitrary size
of 47 x 17 mm and includes an SMA connector. The purpose is to give a reference design for an optimal antenna
implementation. The evaluation board can also be used to test other implementations by cutting and soldering the PCB
into any device.
Evaluation board outline
The evaluation board has a matching circuit implemented next to the antenna. This is aimed to enable optimization
possibilities for the user. The component positions are sized for 0402 (1005 metric) SMD components.
Antenna feed
C2 C4
Transmission line C1C2
C1 C3
C3
C4
Matching circuit Layout on evaluation board
The antenna needs a matching circuit to adjust the resonant frequency balance. When delivered, the evaluation board
is tuned for optimum balance at the WLAN frequency bands using the following (can be replaced by equivalent):
C1 = 0.3 pF (Murata GJM1555C1HR30WB01D) C3 = 0.4 pF (Murata GJM1555C1HR40WB01D)
C2 = 2.2 nH (Murata LQW15AN2N2C10D) C4 = 1.5 pF (Murata GJM1555C1H1R5WB01D)
However, it is common that the resonant frequency will shift during implementation in an arbitrary device. Therefore,
this matching may be changed with other values/components/brands for compensation of such effects. This is further
described in the General Implementation Guidelines section below.
5101 Hidden Creek Ln Spicewood TX 78669 ABRACON IS
Phone: 512-371-6159 | Fax: 512-351-8858 REVISED: ISO9001-2015
For terms and conditions of sales, please visit:
CERTIFIED
www.abracon.com
2.4/5GHz OnBoard WLAN SMD - Antenna
PRO-OB-536 Request Samples Check Inventory
14.20 x 6.60 x 2.50 mm
RoHS/RoHS II Compliant
MSL Level = 1
General Implementation Guidelines
The antenna can be positioned in different ways, although there are some positions which are more beneficial. Below
picture shows a typical PCB with examples on different antenna positions. The optimal position is option 1 or 4.
1 4
Optimal 1&4
3
2 5 6
2&5
3 6
= GND pin(s)
The antenna should be aligned with the PCB edge if possible, preferably with the GND pin(s) close to a corner.
The antenna enables that small electrical components are mounted inside the antenna keep-out block. This is a space-
efficient solution which has very little influence on the performance. It may have an impact on the antenna tuning, but
is fully possible if there is limited space on the PCB.
Another general aspect on surface mounted antennas is regarding the PCB population. If other electrical components
are positioned in the surrounding area of the antenna, some impact on the antenna tuning and radiated performance
may be expected. It is recommended that such components are distributed below a topographical slope that starts on
PCB level at the antenna keep-out block, and slowly increases the height.
It shall also be highlighted that plastic and metal parts in the near proximity of antennas may influence the antenna
tuning and/or performance. This aspect should be noted as a general guideline for all antennas. The effects are difficult
to estimate without detailed information, but it is common that a plastic housing above the antenna shifts the resonant
frequency down. It is recommended to measure the antenna in the actual device after implementation.
5101 Hidden Creek Ln Spicewood TX 78669 ABRACON IS
Phone: 512-371-6159 | Fax: 512-351-8858 REVISED: ISO9001-2015
For terms and conditions of sales, please visit:
CERTIFIED
www.abracon.com
2.4/5GHz OnBoard WLAN SMD - Antenna
PRO-OB-536 Request Samples Check Inventory
14.20 x 6.60 x 2.50 mm
RoHS/RoHS II Compliant
MSL Level = 1
Packaging
The antenna is delivered on tape and reel according to following specifications. The quantity per 13” reel is 1000 pcs.
Unit: mm (unless otherwise noted)
5101 Hidden Creek Ln Spicewood TX 78669 ABRACON IS
Phone: 512-371-6159 | Fax: 512-351-8858 REVISED: ISO9001-2015
For terms and conditions of sales, please visit:
CERTIFIED
www.abracon.com
2.4/5GHz OnBoard WLAN SMD - Antenna
PRO-OB-536 Request Samples Check Inventory
14.20 x 6.60 x 2.50 mm
RoHS/RoHS II Compliant
MSL Level = 1
Part Marking
The top marking of the antenna is arranged according to the following illustration.
There will be a transition period for the part marking until production batches after 2222 (YYWW). Produced batches
before 2222 are marked according to the below illustration.
Ordering Information
Part number Part name Details
PRO-OB-536 OnBoard SMD WLAN Antenna for WLAN/WiFi.
PRO-EB-550 Evaluation board SMD WLAN Evaluation board with PRO-OB-536 for WLAN/WiFi
ATTENTION: Abracon LLC’s products are COTS – Commercial-Off-The-Shelf products; suitable for Commercial, Industrial and, where designated, Automotive Applications. Abracon’s
products are not specifically designed for Military, Aviation, Aerospace, Life-dependent Medical applications or any application requiring high reliability where component failure could
result in loss of life and/or property. For applications requiring high reliability and/or presenting an extreme operating environment, written consent and authorization from Abracon LLC
is required. Please contact Abracon LLC for more information.
5101 Hidden Creek Ln Spicewood TX 78669 ABRACON IS
Phone: 512-371-6159 | Fax: 512-351-8858 REVISED: ISO9001-2015
For terms and conditions of sales, please visit:
CERTIFIED
www.abracon.com
