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Tuneable PCB Antenna (850/1900MHz)
WA_ENG_GEN_APN_012-002
Author: Sierra Wireless Date: March 31, 2010
APN Content Level BASIC INTERMEDIATE ADVANCED Confidentiality Public Private
Software
Compatibility* FW:
5.x 6.x
7.x
Software
Suite: N/A
Plug-
Ins:
TCP/IP N/A Security N/A Compiler Used:
N/A
Reference Hardware
No
Internet N/A LUA N/A Reference Software
No C-GPS N/A RTE : N/A
* refer to software compatibility matrix section for more detail
Hardware
Compatibility
AirPrime Q Series : Q2686 Q2687 Q26Extreme Q26Elite
AirPrime WMP Series : WMP50 WMP100 WMP120 WMP150
AirPrime WS Series : WISMO218 WISMO228
AirPrime AR Series AR3550 AR5550 AR8550
AirLink FXT Series : Fastrack Xtend GPRS Fastrack Xtend EDGE Fastrack Xtend HSPA Fastrack Xtend CDMA
Legacy products (GSM): Q24Classic Q24Plus Q24Extended Q24Auto
Fastrack Supreme Q52Omni Q64
Legacy products (CDMA): Q2438F Q2438R
WA_ENG_GEN_APN_012 Rev 002 March 31, 2010 1
1 Version
www.sierrawireless.com
2 Introduction
3 Application Note Description
4 Features Supported
5 Application Environment
6 Geometry
Tuneable PCB Antenna (850/1900MHz)
WA_ENG_GEN_APN_012-002
WA_ENG_GEN_APN_012 Rev 002 March 31, 2010 2
7 Test Result
Directivity
Orientation
Max. Antenna Gain (dBi)
GSM850, channel 190 PCS, channel 661
in azimuth -0.7 0.5
in elevation front 0.6 0.6
in elevation side -0.3 1.9
Caution
Tuneable PCB Antenna (850/1900MHz)
WA_ENG_GEN_APN_012-002
WA_ENG_GEN_APN_012 Rev 002 March 31, 2010 3
Performance on Return Loss, S11
Note: The measurement above is based on the original PCB antenna without any tuning.
Tuning
Tuneable PCB Antenna (850/1900MHz)
WA_ENG_GEN_APN_012-002
WA_ENG_GEN_APN_012 Rev 002 March 31, 2010 4
8 Environmental Impact
Tuneable PCB Antenna (850/1900MHz)
WA_ENG_GEN_APN_012-002
WA_ENG_GEN_APN_012 Rev 002 March 31, 2010 5
Note: The environment provided by the customer application to the “Tuneable PCB Antenna” (mainly items “a” to “d” described at the beginning of this section) may introduce very unpredictable effects to the “Tuneable PCB Antenna” in a way that Sierra Wireless cannot guarantee the radiated performance of a new product using this application note. In particular, following parameters may be impacted: Frequency bandwidth, Impedance, Radiation pattern, Transmitter harmonics and SAR (Special Absorption Rate)
Environmental Change
Effect
GSM 850 PCS
Limit when Effect Insignificant Operating
Band Return Loss
Operating Band
Return Loss
PCB Substrate
Thickness --
Metallic Plate Distance
Upper 8 mm for Aluminium
12 mm for Copper
Left
15 mm for Aluminium
20 mm for Copper
Bottom
20 mm for Aluminium
30 mm for Copper
Plastic Distance
Upper -- 0 mm
Left -- 0 mm
Bottom Slightly 3 mm
Top Slightly Slightly 2 mm
Grounding Width
Right No conclusion
--
Left degraded --
Shielding Distance
C* 7.0 mm
B* Slightly 8.0 mm
Right 7.0mm +
Lower 8.0 mm --
Just out of restricted area of internal antenna
Legend:
:Increase/Better
:Decrease/Worse
Tuneable PCB Antenna (850/1900MHz)
WA_ENG_GEN_APN_012-002
WA_ENG_GEN_APN_012 Rev 002 March 31, 2010 6
:Shift left
:Shift Right
:Insignificant change
*B, C:Distance refers to figure shown in section 7 Test Result.
9 Antenna Placement
10 Comparison of European and US GSM Band Antenna Application
11 Reference Hardware
12 Package Deliverables
Filename Description
WA_ENG_GEN_APN_012-002.zip Tuneable PCB Antenna (850/1900MHz)
Documentation
Tuneable PCB Antenna (850/1900MHz)
WA_ENG_GEN_APN_012-002
WA_ENG_GEN_APN_012 Rev 002 March 31, 2010 7
Filename Description
Tuneable_PCB_Antenna_850_and_1900MHz-Rev002.pdf Tuneable PCB Antenna (850/1900MHz)
13 Support
14 Document History
Version Date History
001 November 23, 2005 Creation
002 March 31, 2010 Reformatted to the rebranded SWI template.
15 Legal Notice Important Notice
Safety and Hazards
Note: Some airlines may permit the use of cellular phones while the aircraft is on the ground and the door is open. Sierra Wireless modems may be used at this time.
’s control
Limitations of Liability
“as is”. Sierra Wireless makes no warranties of any kind, either expressed or implied, including any implied warranties of
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