Product Specification Rufa A5839H / A5887H PS-1.0 Page 1
Antennas for Wireless Applications
1. Features
Designed for 2.4GHz applications: BT / BLE, Wi-Fi® (802.11a/b/g/n), ZigBee®,
etc.
Easy to integrate
Low profile design
High efficiency
Intended for SMD mounting
Supplied in tape and reel
2. Description
Rufa is intended for use with all 2.4 GHz applications. The antenna uses a ground plane
in order to radiate efficiently, but this ground plane must not extend underneath the
antenna itself.
The antenna is available in two versions with the feed locations on the right or left hand
side of the antenna.
3. Applications
Wearables
Notebooks
PC-cards
Sensors
Rufa 2.4GHz SMD Antenna
Part No. A5839H / A5887H gigaNOVA ® Product Specification
Rufa
Part No. A5839H / A5887H
Antennas for Wireless Applications
Product Specification Rufa A5839H / A5887H PS-1.0 Page 2
4. Part Number
Rufa Left: A5839H Rufa Right: A5887H
5. General Data
6. RF Characteristics
Product name
Rufa
Part Number
A5839 (Left) A5887 (Right)
Frequency
2.4 – 2.5GHz
Polarization
Linear
Operating temperature
-40°C to140°C
Environmental condition test
ISO 16750-4.5.1.1.1/5.1.2.1/5.3.2
Impedance with matching
50 Ω
Weight
0.1 g
Antenna type
SMD
Dimensions
12.8 x 3.9 x 1.1 (mm)
Peak gain
Average gain (Linear)
Average efficiency
Maximum return loss
Maximum VSWR
All data measured on Antenova’s evaluation PCB
Part No. A5839H-EVB-1 and A5887H-EVB-1
Rufa
Part No. A5839H / A5887H
Antennas for Wireless Applications
Product Specification Rufa A5839H / A5887H PS-1.0 Page 3
7. RF Performance
7.1 Return Loss
7.2 VSWR
Rufa
Part No. A5839H / A5887H
Antennas for Wireless Applications
Product Specification Rufa A5839H / A5887H PS-1.0 Page 4
7.3 Antenna pattern
7.3.1 2400 MHz – 2500 MHz
3D pattern at 2450 MHz
Drag to rotate pattern and PCB by using Adobe Reader
(Click to Activate)
Rufa
Part No. A5839H / A5887H
Antennas for Wireless Applications
Product Specification Rufa A5839H / A5887H PS-1.0 Page 5
8. Antenna Dimensions
Rufa: A5839H / A5887H
All Dimensions in (mm)
5 solder pads (2.0 x 1.0 mm)
Top side
Bottom Side
Rufa
Part No. A5839H / A5887H
Antennas for Wireless Applications
Product Specification Rufa A5839H / A5887H PS-1.0 Page 6
9. Schematic symbol and Pin definition
The circuit symbol for the antenna is shown below. The antenna has 5 pins with only
two as functional. All other pins are for mechanical strength.
10. Antenna footprint
The recommended host PCB footprint is below.
Pin
Description
2
Feed
3
GND
1,4,5
Not used
(Mechanical only)
Rufa
Part No. A5839H / A5887H
Antennas for Wireless Applications
Product Specification Rufa A5839H / A5887H PS-1.0 Page 7
11. Electrical Interface
11.1 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 track, so the characteristic
impedance of the co-planar transmission is 50 Ω.
11.2 Matching Circuit
The antenna requires a matching circuit that must be optimized for each product. The
matching circuit will require up to three components and the following circuit should be
designed into the host PCB. Not all components may be required but should be included
as a precaution. The matching network must be placed close to the antenna feed to
ensure it is more effective in tuning the antenna.
Rufa
Part No. A5839H / A5887H
Antennas for Wireless Applications
Product Specification Rufa A5839H / A5887H PS-1.0 Page 8
12. Antenna Integration Guide
12.1 Antenna Placement
Antenova M2M strongly recommends placing the antenna at the edge of the board.
Maximum antenna performance is achieved by placing the antenna towards one of the
corners of the PCB and with the feed point of the antenna as close to same corner of the
PCB as possible.
Additional ground and components near the antenna should be at a distance of at least
2mm. Where possible the antenna should be clear of ground from both sides, although the
antenna can work well with a minimum clearance of D ≥ 2 mm as shown in the drawing
above.
Rufa
Part No. A5839H / A5887H
Antennas for Wireless Applications
Product Specification Rufa A5839H / A5887H PS-1.0 Page 9
13. Reference Board
The reference board has been designed for evaluating A5839H / A5887H and includes a
SMA female connector.
A5389H / A5887H Evaluation Board
To order a reference board please see www.antenova.com
Rufa
Part No. A5839H / A5887H
Antennas for Wireless Applications
Product Specification Rufa A5839H / A5887H PS-1.0 Page 10
13.1 Reference Board Matching Circuit
Designator
Type
Value
Description
L1
Inductor
15nH
Murata LQG15HN series
C1
Capacitor
2.2pF
Murata GJM15 series
C2
Capacitor
Not fitted
Not fitted
Rufa
Part No. A5839H / A5887H
Antennas for Wireless Applications
Product Specification Rufa A5839H / A5887H PS-1.0 Page 11
14. Comparison S11
The A5839H/A5887H is a direct replacement for the A5839/A5887 original parts. The below
is a comparison between each on the same evaluation PCB.
14.1 Return Loss
14.2 VSWR
A5839
A5839H
A5839
A5839H
Rufa
Part No. A5839H / A5887H
Antennas for Wireless Applications
Product Specification Rufa A5839H / A5887H PS-1.0 Page 12
14.3 Pattern Comparison
The A5839H/A5887H is a direct replacement for the A5839/A5887 original parts. The below
is a comparison between each on the same evaluation PCB shown in a polar format.
A5839H
A5839
Rufa
Part No. A5839H / A5887H
Antennas for Wireless Applications
Product Specification Rufa A5839H / A5887H PS-1.0 Page 13
15. 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.
16. Hazardous Material Regulation Conformance
The antenna has been tested to conform to RoHS requirements. A certificate of
conformance is available from Antenova’s website.
17. Packaging
17.1 Optimal Storage Conditions
Temperature
-10ºC to 40ºC
Humidity
Less than 75% RH
Shelf life
24 Months
Storage place
Away from corrosive gas and direct sunlight
Packaging
Reels should be stored in unopened sealed
manufacturer’s plastic 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.
Rufa
Part No. A5839H / A5887H
Antennas for Wireless Applications
Product Specification Rufa A5839H / A5887H PS-1.0 Page 14
17.2 Tape Characteristics
Rufa Left
[Part Number: A5839H]
1000/5000 pcs/reel
Rufa
Part No. A5839H / A5887H
Antennas for Wireless Applications
Product Specification Rufa A5839H / A5887H PS-1.0 Page 15
Rufa Right
[Part Number: A5887H]
Rufa
Part No. A5839H / A5887H
Antennas for Wireless Applications
Product Specification Rufa A5839H / A5887H PS-1.0 Page 16
17.3 Reel Dimensions
17.4 Box Dimensions
17.5 Bag Properties
Reels are supplied in protective plastic packaging.
1000pc Reel
W
D
H
C
24 mm
180 mm
60 mm
13mm
5000pc Reel
W
D
H
C
24 mm
330 mm
80 mm
13mm
Rufa
Part No. A5839H / A5887H
Antennas for Wireless Applications
Product Specification Rufa A5839H / A5887H PS-1.0 Page 17
17.6 Reel Label Information
Product Specification Rufa A5839H / A5887H PS-1.0 released February 2019 Page 18
Antennas for Wireless Applications
Quality statements
Antenova’s products conform to REACH and RoHS legislation. For our statements
regarding these and other quality standards, please see www.antenova.com.
Antenna design, integration and test resources
Product designers – the details contained in this datasheet will help you to complete
your embedded antenna design. Please follow our technical advice carefully to
obtain optimum antenna performance.
It is our goal that every customer will create a high performing wireless product using
Antenova’s antennas. You will find a wealth of design resources, calculators and
case studies to aid your design at our website.
Antenova’s design laboratories are equipped with the latest antenna design tools
and test chambers. We provide antenna design, test and technical integration
services to help you complete your design and obtain certifications.
If you cannot find the antenna you require in our product range, please contact us to
discuss creating a bespoke antenna to meet your requirement exactly.
Contacts
Join our online antenna design community: ask.antenova.com
Order antenna samples and evaluation boards at: www.antenova.com
Request a quotation for antennas by volume: sales@antenova.com
Global Headquarters:
Antenova Ltd, 2nd Floor Titan Court, 3 Bishop Square,
Hatfield, AL10 9NA +44 (0) 1223 810600
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family names and the Antenova 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
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