Prestta
Prestta Antenna Application Note CONFIDENTIAL AND PROPRIETARY Release 3/10/2010
Antenna Application Note
PresttaTM Standard WLAN
Embedded Antennas
Applications:
Access Points/Gateways/Routers
Healthcare
Industrial Devices
WiFi enabled Televisions & Monitors
WLAN
9605 Scranton Road, Suite 300
San Diego, CA 92121 USA
Ph: +(1) 858.550.3820
Fx: +(1) 858.550.3821
Email: [email protected]
PROPRIETARY INFORMATION
Release March 10, 2010
Product specifications subject to change without notice.
Ethertronics, Inc.
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Prestta Antenna Application Note CONFIDENTIAL AND PROPRIETARY Release 3/10/2010
Table of Contents
1
PURPOSE
4
2
OVERVIEW
4
3
DESIGN GUIDELINES
6
3.1 Introduction
6
3.2 Antenna Placement Guidelines
6
3.3 Tuning Guidelines Introduction
6
3.4 Antenna Pad Layout
7
3.5 PCB Land Pattern
7
3.6 Typical Performance
8
3.7 Tuning Guidelines
10
3.8 Shield Can Tuning Guidelines
12
4
MATERIAL SPECIFICATIONS
20
5
PRODUCT TESTING
20
6
MANUFACTURING AND ASSEMBLY GUIDELINES
22
7
GLOSSARY OF TERMS
24
8
APPENDIX 1
25
Ethertronics, Inc.
1000146 Prestta WLAN Antenna
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Prestta Antenna Application Note CONFIDENTIAL AND PROPRIETARY Release 3/10/2010
Antenna Application Note
RESTRICTED PROPRIETARY INFORMATION
The information disclosed herein is the exclusive property of Ethertronics Inc. and is not to be disclosed without the written consent
of Ethertronics Inc. No part of this publication may be reproduced or transmitted in any form or by any means including electronic
storage, reproduction, execution or transmission without the prior written consent of Ethertronics Inc. The recipient of this document by its retention and use agrees to respect the security status of the information contained herein.
Ethertronics may make changes to specifications and product descriptions at any time, without notice.
Ethertronics, Inc. assumes no responsibility or liability for any errors or inaccuracies that may appear in this document.
Copies of documents that are referenced in this document or other Ethertronics literature may be obtained by calling
(858) 550-3820, email at [email protected] or the website www.ethertronics.com .
Contact your local sales office or manufacturers’ representative to obtain the latest specifications.
© 2010 Ethertronics. All rights reserved. The Ethertronics logo; shaping antenna technology, Isolated Magnetic Dipole, and Savvi
are trademarks of Ethertronics. All other trademarks are the property of their respective owners.
Product specifications subject to change without notice.
Ethertronics, Inc.
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Prestta Antenna Application Note CONFIDENTIAL AND PROPRIETARY Release 3/10/2010
Antenna Application Note
1. Purpose
This document provides information for incorporating Ethertronics’ Prestta™ standard embedded antennas into wireless products. Specifications, design recommendations, board layout, packaging
and manufacturing recommendations are included.
This document is divided into two parts: a main section and appendices. The main section addresses
points and issues common to all products. The appendices provide product-specific information.
2. Overview
The Prestta Product Line
The Prestta series of standard WLAN embedded antennas represents a new category of standard, internal antennas. Ethertronics’ antennas utilize proprietary and patented Isolated Magnetic Dipole (IMD)
technology to meet the needs of device designers for higher functionality and performance in smaller/
thinner designs.
IMD Technology Advantages
Real-World Performance and Implementation
Ethertronics continues to set the standard for antenna performance with its award-winning IMD technology, which uses patented design configurations to confine the current flow to the antenna element rather
than exciting the main circuit board. Other antennas may contain simple PiFA or monopole designs that
interact with their surroundings, complicating layout or changing performance with user position. Ethertronics’ antennas utilize patented IMD technology to deliver a unique size and performance combination.
IMD technology offers important real-world advantages over other approaches. Please see our white
paper and Website www.ethertronics.com for a full explanation.
Product specifications subject to change without notice.
Ethertronics, Inc.
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Prestta Antenna Application Note CONFIDENTIAL AND PROPRIETARY Release 3/10/2010
Antenna Application Note
MD Features, Advantages and Benefits Summary
Feature
Advantage
Benefits
High performance
High efficiency
Meet and exceed design performance
specs. Lower design risks. Enhance enduser satisfaction.
Less interaction with surrounding components. Smallest effective antenna size
when component keep-out areas are included. Resists de-tuning due to orientation on circuit board. Lowers design risk
and time to market. One antenna part
number can serve multiple designs. Simplifies design and ordering.
Eliminates need for additional band-pass
filters and other circuitry. Saves cost and
space.
Better performance. Higher end-user satisfaction.
High isolation
High selectivity
Superior RF Field
Containment
Virtually eliminates detuning
Prestta Features and Benefits Summary
Features
Benefits
Stamped Metal Antennas with SMD
capability
• Flexibility in antenna placement with direct placement on
customer PCB
• Ease of manufacturing
Embedded Solutions for WLAN
• Eliminates external antennas
• More desirable form factors
• Can be used in Access Points, Routers, Gateways, Wireless
Displays/TVs, and other consumer electronic devices
High Performance
• Better performance than external dipole in diversity antenna
situation
Ground Cleared Solution
• Enables flexibility in antenna placement within end device
• Can be used within Access Points, Routers, Handhelds, Displays
Extensive Design Collateral and Apps
Support
• Speeds development time
Standard “Off the Shelf” Product
• Speeds development time and reduces costs by reducing
NRE and custom development time
Ethertronics, Inc.
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Prestta Antenna Application Note CONFIDENTIAL AND PROPRIETARY Release 3/10/2010
Antenna Application Note
Product Selector Guide
Antenna PN
Application
Type
Typical Deliverable
Size (Antenna with PCB)
1000146
WLAN
•
•
•
•
• Antenna element only
• SMT
• 17.9 x 6.9 x 4.3 mm (Antenna
only)
2.4, 4.9 GHz
5.2, 5.8 GHz
Ground Cleared
2.4 & 5 GHz
Flexible antenna placement
Antenna element from
1000418
Additional antennas are under development, please see Ethertronics’ Website, or ask your Ethertronics
salesperson about additional products to meet your needs.
3. Design Guidelines
3.1 Introduction
The Prestta standard WLAN embedded antenna can be designed into many wireless product types. The
following sections explain Ethertronics’ recommended layouts to help the designer integrate the
1000146 antenna element into a device with optimum performance.
3.2 Antenna Placement Guidelines
Figure 1 at the right shows the optimal
placement of the 1000146 antenna, with
its pad layout, on a PCB:
•
•
Placement on bottom side of board
Placement on top side
of board (dimensions
include layout)
Top edge of board
Antenna should always be placed
along the edge of the board unless
there are special conditions preventing this
The antenna can be placed on either
the top or bottom side of the PCB.
The recommended antenna location,
when you are looking at the board,
lies at the corner where its upper
and right edges align with the two
board edges.
3.3 Tuning Guideline Introduction
Figure 1
The 1000146 is the metal element of the 1000418 assembly with PCB, RF cable and connector. The
1000146 metal antenna can be mounted onto any PCB using Ethertronics’ recommended ground layout.
For the purposes of the Design Guidelines section, the 1000146 has been mounted on a PCB demo
board to approximate a standard sized PCB in an end device (e.g. router, access point).
Ethertronics, Inc.
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Prestta Antenna Application Note CONFIDENTIAL AND PROPRIETARY Release 3/10/2010
Antenna Application Note
3.4 Antenna Pad Layout
Figure 2 at the right shows the Prestta Standard 100146 Antenna pad layout (bottom view)
•
•
Support leg,
no ground
connection
Ground leg
Feed leg
Maximum Dimensions: 17.9 x 6.9 x 4.3 mm
RF Mounting: antenna is SMD attached to the main PCB
Cross hatch areas = solder area on antenna
Figure 2
3.5 PCB Land Pattern
Figure 3 below shows the typical PCB land Pattern (top view).
Ground Solder Mask Area
Ground Clearance Area
8.6mm
45mm
Feeding Point
Ground
Figure 3
Ethertronics, Inc.
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Prestta Antenna Application Note CONFIDENTIAL AND PROPRIETARY Release 3/10/2010
3.6 Typical Performance
Typical performance figures were done by placing the 1000146 antenna on a PCB (topside) as shown in
Figure 1. Figure 4 below shows the typical VSWR performance (bg band)
Figure 4
Figure 5 below shows typical VSWR performance (a band)
Figure 5
Ethertronics, Inc.
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Prestta Antenna Application Note CONFIDENTIAL AND PROPRIETARY Release 3/10/2010
Figure 6 below shows the typical Efficiency performance (bg band)
Figure 6
Figure 7 below shows typical Efficiency performance (a band)
Figure 7
Ethertronics, Inc.
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Prestta Antenna Application Note CONFIDENTIAL AND PROPRIETARY Release 3/10/2010
3.7 Tuning Guidelines
In a real application environment, variation of the antenna resonating frequency may be caused by the
following effects
• Different antenna locations
• PCB board variations
• Components and shield cans located close to the antenna
• Outside Cover
The following methods can be applied to solve the above effects
• bg band: pad tuning
• a band: slot tuning
bg Band Tuning: Varying the Pad
Size
•
•
bg center frequency can be
tuned by changing the pad
length (Figure 8 at right)
For frequency tuning, the right
edge remains unchanged,
whereas the left edge moves
to different positions.
Pad Length = Tuned
8.6mm
45mm
Figure 8
See Figure 9 at right and Figure 10
below for a and bg band tuning demonstrations
•
The longer the pad is, the lower
the bg band center frequency
shifts
Figure 9
•
a band is not affected by varying the pad size
Figure 10
Ethertronics, Inc.
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Prestta Antenna Application Note CONFIDENTIAL AND PROPRIETARY Release 3/10/2010
a Band Tuning: Inserting a Slot
•
•
•
a band center frequency can be
tuned by inserting a slot at the
antenna ground plane (Figure 11
at right)
The distance of the slot and the
left edge of the ground determines the frequency shift
Recommended slot dimension =
11mm x 1mm
Slot Distance = Tuned
L=11mm
11.5mm
45mm
Figure 11
See Figure 12 and Figure 13 below for a and bg tuning demonstrations
•
The farther the slot is, the
lower a band center frequency shifts
Figure 12
•
bg band is not affected by
inserting a slot
Figure 13
Ethertronics, Inc.
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Prestta Antenna Application Note CONFIDENTIAL AND PROPRIETARY Release 3/10/2010
Recommended Ground Layout for Tuning
Figure 14 below shows the recommended ground layout for tuning.
bg band tuning
a band tuning
L=11mm
11.5mm
45mm
50 Ω input
Figure 14
3.8 Shield Can Tuning Guidelines
Figure 15
Figure 15 above provides examples of a shield can demonstration. A 60x45x5 mm shield can is placed
close to the antenna to show its effect. The shield can causes frequency shifting of the antenna but
the peak efficiency is not affected. Therefore, when a shield can is placed close to the antenna, the
de-tuning effect can be compensated by frequency tuning through methods mentioned earlier.
Ethertronics, Inc.
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Prestta Antenna Application Note CONFIDENTIAL AND PROPRIETARY Release 3/10/2010
Figures 16 and 17 below show the shield can effect on VSWR for a and bg bands
•
•
The shield can causes the
bg band center frequency
to shift lower.
The closer the shield can
is, the more the frequency
shift.
Figure 16
•
Shield can effect on a
band matching is relatively
small
Figure 17
Ethertronics, Inc.
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Prestta Antenna Application Note CONFIDENTIAL AND PROPRIETARY Release 3/10/2010
Figures 18 and 19 below show the shield can effect on Efficiency for a and bg bands
bg bands
• The frequency at which
the peak efficiency appears to shift is due to the
shield can effect, however,
the same peak value is
always achieved.
Figure 18
•
Shield can effect on a
band matching is relatively
small
Figure 19
Ethertronics, Inc.
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Prestta Antenna Application Note CONFIDENTIAL AND PROPRIETARY Release 3/10/2010
Space Saving Configuration—PCB Land Pattern
With the Space Saving Configuration, less ground clearance area needs to be kept underneath the antenna. Figure 20 below shows the PCB Land Pattern Ground Solder Mask Area
Ground
Clearance Area
8.6mm
36mm
Ground
Feeding Point
Figure 20
Figures 21 and 22 below show the Space Saving Configuration effect on VSWR for a and bg bands.
•
Maximum VSWR in BG
band will increase from
1.7:1 to 2:1
Figure 21
Figure 22
Ethertronics, Inc.
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Prestta Antenna Application Note CONFIDENTIAL AND PROPRIETARY Release 3/10/2010
Figures 23 and 24 below show the Space Saving Configuration effect on Efficiency for a and bg bands.
•
Average efficiency in bg
band will decrease from
81% to 69%
Figure 23
Figure 24
Ethertronics, Inc.
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Prestta Antenna Application Note CONFIDENTIAL AND PROPRIETARY Release 3/10/2010
Space Saving Configuration—Recommended Layout for Tuning
Figure 25 below shows the recommended layout for tuning.
bg band tuning
a band tuning
11.5mm
L=11mm
36mm
50 Ω input
Figure 25
MIMO Application Guidelines
Figure 26 at right shows the
recommended layout for MIMO
applications.
• Place two antennas on two
perpendicular edges of a
board.
• The recommended antenna edge-to-edge distance is 85mm or larger for
in-band isolation of 20dB
or greater. (Note, this will
depend on the environment in which the two antennas are located).
• To improve isolation in
limited space, Ethertronics has developed a special isolator approach. As
an example, minimum
30dB isolation can be
achieved with an antenna
edge-to-edge distance of
45mm.
antenna
edge-to-edge
distance
antenna
edge-to-edge
distance
Please contact Ethertronics
Figure 26
Ethertronics, Inc.
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Prestta Antenna Application Note CONFIDENTIAL AND PROPRIETARY Release 3/10/2010
Figure 27 below shows the recommended guidelines when two antennas must be placed on the same
edge of a PCB.
•
antenna
edge-to-edge
distance
The edge-to-edge distance
should be 80mm or greater
for in-band isolation of
20dB or greater.
Figure 27
Figure 28 below shows the recommended guidelines when two antennas must be placed on opposite
edges of a PCB.
•
The edge-to-edge distance should be 100mm
or greater.
antenna
edge-to-edge
distance
Figure 28
Ethertronics, Inc.
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Prestta Antenna Application Note CONFIDENTIAL AND PROPRIETARY Release 3/10/2010
MIMO Application Example
Figure 29 below shows a typical MIMO configuration where two 1000146 antennas and a shield can are
placed close together in the corner of a PCB.
Isolator
22mm
ANT2
20mm
8.6mm
22mm
60mm
ANT1
60x45x5mm
Shield Can
14mm
8.6mm
Ground
ANT1 & ANT2:
Metal antenna with ground pattern
Figure 29
•
•
Both antennas have typical VSWR and efficiency performances described above.
In-band isolation is less than –30dB as shown in Figure 30 below.
0
-10
Isolation (dB)
-20
-30
-40
-50
-60
2000
2500
3000
3500
4000
4500
5000
5500
6000
Frequency (MHz)
Figure 30
Ethertronics, Inc.
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Prestta Antenna Application Note CONFIDENTIAL AND PROPRIETARY Release 3/10/2010
Antenna Application Note
4. Material Specifications
Item
Material
Metal Element
C5210
Contact Finish
Ni and selective Au standard
5. Product Testing
NO
Test
Type
Items
Test condition
1
High 85°C±3°C
Temp . 120hr ±2hr
2
Low -40°C±3°C
Temp. 120hr ±2hr
4
5
Environment test
3
Test method
Step 1: Test VSWR (by jig for antenna only elements/no PCB).
Step 2: Put it in the chamber.
Step 3: Test it like this picture
which explains temp. cycle.
Step 4: Test VSWR after 1hr in
normal Temp. & normal Humidity
Step 1: Test VSWR (by jig for antenna only elements/no PCB).
Step 2: Put it in the chamber.
Step 3: Test it like this picture
which explains temp. cycle.
Step 4: Test VSWR after 1hr in
normal Temp. & normal Humidity
Step 1: Test VSWR (by jig for antenna only elements/no PCB).
Step 2: Put it in the chamber.
Step 3: Test it like this picture
which explains temp. cycle.
Step 4: Test VSWR after 1hr in
normal Temp. & normal Humidity
High
85°C±3°C
Temp. &
RH=85%
High
120hr ±2hr
Humidity
Nacl 5%,
Salt Spray 35°C,
48hr
Step 1: Test VSWR (by jig for antenna only elements/no PCB).
Step 2: Put it in the chamber.
Step 3: Start test.
Step 4: Wash the samples.
Step 5: Test VSWR after 1hr in normal Temp. & normal Humidity
-40°C±3°C/30min,
Thermal
85°C±3°C/30min,
shock
32cycle
Step 1: Test VSWR (by jig for antenna only elements/no PCB).
Step 2: Put it in the chamber.
Step 3: Test it like this picture
which explains temp. cycle.
Step 4: Test VSWR after 1hr in
normal Temp. & normal Humidity
Product specifications subject to change without notice.
Ethertronics, Inc.
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Prestta Antenna Application Note CONFIDENTIAL AND PROPRIETARY Release 3/10/2010
Antenna Application Note
NO
Reflow test
6
Test
Items
Type
Test condition
Pre Heating
200°C±5°C 30~60sec
Reflow
Peak Heating
test
260°C±5°C
30sec Max
Test method
Step 1: Put it in REFLOW
Step 2: Test it like this picture
which explains temp. Cycle
by EV board
Product specifications subject to change without notice.
Ethertronics, Inc.
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Prestta Antenna Application Note CONFIDENTIAL AND PROPRIETARY Release 3/10/2010
Antenna Application Note
6. Manufacturing and Assembly Guidelines
Ethertronics’ Prestta Standard WLAN antennas are designed for high volume board assembly. Because
different product designs use different numbers and types of devices, solder paste, and circuit boards,
no single manufacturing process is best for all PCBs. The following recommendations have been determined by Ethertronics, based on successful manufacturing processes.
The metal antenna only and metal antenna with carrier solutions are designed for automated pick and
place surface mounting. However, as with any SMT device, Ethertronics antennas can be damaged by
the use of excessive force during the handling or mounting operation.
Component Handling Recommendations
The following are some recommendations for component handling and automated mounting:
•
For manual mounting and handling, vacuum pens should be used to pick-up, transfer and
mount the antennas.
•
Take care not to deform the metal antenna
Metal Component Handling Recommendations
Ethertronics’ metal antennas are not moisture sensitive and the antennas meet the requirements for a
Level 1 classification of J-STD-020A (moisture/reflow sensitivity classification for non-hermetic solid
state surface mount devices from the Institute for Interconnecting and Packaging Electronic Circuits).
Nevertheless, as a precaution to maintain the highest level of solder ability, Ethertronics antennas are
dry-packed.
(NOTE: Normal oxidation may result in a slight discoloration of the gold nickel surface. This has no effect on the performance of the antenna.)
Paste Stencil Recommendation
Ethertronics recommends application of paste stencil to a thickness of 0.1mm, applied to within 0.05 mm
of the solder mask surrounding each exposed metal pad on the PCB. PCB layouts for each antenna are
provided below.
Soldering Recommendations
The recommended method for soldering the antenna to the board is forced convection reflow soldering.
The following suggestions provide information on how to optimize the reflow process for the ceramic
antenna:
•
Adjust the reflow duration to create good solder joints without raising the antenna temperature beyond the allowed maximum of
260° C.
Product specifications subject to change without notice.
Ethertronics, Inc.
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Prestta Antenna Application Note CONFIDENTIAL AND PROPRIETARY Release 3/10/2010
Antenna Application Note
Cleaning Recommendations
After the soldering process, a simple wash with de-ionized water sufficiently removes most residues
from the PCB. Most board assembly manufacturers use either water-soluble fluxes with water wash, or
“no clean” fluxes that do not require cleaning after reflow.
Acceptable cleaning solvents are CFC alternatives, Isopropyl Alcohol (IPA), and water. If the application
uses other types of solvents, please consult with Ethertronics.
Cleaning processes that should be avoided are ultrasonic cleaning and any abrasive techniques, such
as scrubbing with an abrasive material.
Rework & Removal Recommendations
There may be a need to rework or remove the antenna from the PCB. Although Ethertronics’ antennas
are designed for ease-of-use, use care when separating them from the PCBs. Careless heating or
removal of the antenna can cause thermal, mechanical or lead damage. These degradations may render
the antenna useless, impeding any failure analysis and preventing the reuse of the device. Therefore it
is recommended to observe the following precautions:
•
The component can be reworked and soldered by hand using a soldering iron. However
care should be used so the temperature does not exceed 260°. The soldering iron should
not touch the composite material while soldering the leads of the antenna.
•
The component can be reworked and soldered using a hot air rework station. However, care
should be taken to ensure that the temperature does not exceed 260° C.
•
Once the solder on the PCB is sufficiently heated, use a vacuum pen to lift the antenna
straight up off the PCB. Avoid twisting or rotating the device while removing it.
Packaging Specifications
Tape & Reel
PN
1000146
Box Dims
Tape & Reel Dims
# Reels/Box
# Parts/Reel
# Parts/Box
350x370x290 mm
Φ330*32.4(H)
6
1,200
7,200
Product specifications subject to change without notice.
Ethertronics, Inc.
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Prestta Antenna Application Note CONFIDENTIAL AND PROPRIETARY Release 3/10/2010
Antenna Application Note
7. Glossary of Terms
For a complete list of terms, please visit the Ethertronics Web site at www.ethertronics.com/resources/
glossary/, or enter http://files.ctia.org/pdf/Telecom_Glossary_of_Terms.pdf into your browser.
Ethertronics, Inc.
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Prestta Antenna Application Note CONFIDENTIAL AND PROPRIETARY Release 3/10/2010
Antenna Application Note
Appendix 1
Summary of Prestta™ Antenna
Part No. 1000146
WLAN a/b/g/n + Japan
Antenna (GHz)
Electrical Specifications
Typical Characteristics
2.390-2.490
b, g
4.900-5.100
Japan
5.150-5.350
a
5.70-5.900
a
1.5-2.5 dBi
1.5-3.5 dBi
2-3.5 dBi
2-3.5 dBi
81%
70%
75%
Peak Gain
Average Efficiency
VSWR Match
Feed Point Impedance
Mechanical Specifications
<1.6:1
Dimensions
.33 g
Efficiencies
3
<1.3:1
17.9 x 6.9 x 4.3 mm
Weight
VSWR
72%
<1.8:1
<1.5:1
50 Ω unbalanced (other if required)
100%
90%
70%
2
Efficiency
WLAN b,g
VSWR (:1)
WLAN b,g
80%
60%
50%
40%
30%
20%
1
2370
2390
2410
2430
2450
Freq in MHz
2470
2490
10%
0%
2380
2510
3
2400
2420
5000
5200
2440
Freq in MHz
2460
2480
2500
5400
5600
5800
6000
100%
90%
WLAN a
70%
2
1
4800
Efficiency
VSWR (:1)
WLAN a
80%
60%
50%
40%
30%
20%
5000
5200
5400
5600
5800
6000
10%
0%
4800
Freq in MHz
Freq in MHz
Freq (MHz)
Freq (MHz)
Typical Performance
Ethertronics’ Test Board
PCB: 120 x 180 mm
Phi
Theta
2.390-2.490 GHz Band
Phi = 0o Plane
Antenna Radiation
Patterns
330o
0o5 dBi
0
Phi = 90o Plane
30o
330o
-5
300o
-25
-25
-25
-5
0
0
0
5 dBi
210o
150o
4.900-5.900 GHz Band
0o5 dBi
0
5 dBi
210o
150o
330o
0o5 dBi
0
5 dBi
30o
330o
0o5 dBi
0
-5
-5
-5
-10
-10
-10
60o
300o
60o
-15
-20
-20
-25
-25
-30
300o
-25
-20
-20
-15
120o
-10
-30
90o270o
-20
120o
-10
-15
240o
-5
-5
0
0
0
150o
210o
5 dBi
180o
Product specifications subject to change without notice.
150o
120o
-10
-5
5 dBi
90o
-30
-25
-15
240o
60o
-15
-25
-30
-25
30o
-20
-30
90o 270o
-30
150o
180o
180o
30o
120o
-10
-5
180o
Ethertronics, Inc.
-15
240o
120o
-10
-5
-15
210o
-20
-15
180o
240o
-25
-20
240o
120o
-10
90o
-30
-25
-15
270o
2 o
90o 270
-30
-20
300o
-30
-30
270o
60o
-15
-20
90o
30o
-10
300o
60o
-15
-25
330o
0
-5
-20
-30
210o
0o5 dBi
-20
-30
240o
330o
30o
0
-10
60o
-15
270o
Theta = 90o Plane
-5
-10
300o
0o5 dBi
210o
5 dBi
150o
180o
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Prestta Antenna Application Note CONFIDENTIAL AND PROPRIETARY Release 3/10/2010
Antenna Application Note
To optimize designs using Ethertronics’ Prestta™ WLAN antenna, the PCB should use the recommended land pattern shown in the Figures below.
Antenna Pad Layout
Pin
Description
1
Feed
2
Ground
3
Dummy Pad
PCB Layout
Ethertronics provides antenna layout files in .DXF format. This is a universal file format and should be converted into
your specific file format
Ethertronics, Inc.
Product specifications subject to change without notice.
26
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