SAR report appendix C

FCC ID: Q2GIX104-140

RF Exposure Info

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FCCID_579884

SAR Test Report No: SAR_958_2005_FCC_2450_5000_WLAN_BT_140 Date of Report: 8/29/2005 Page 1 of 11 Appendix C Miscellaneous Tissue Parameters 2450MHz Head liquid: Recipe: 53.74% distilled water 22.59% DGBE 22.59% triton X-100 0.98% salt 0.1% bactericide Di-electric constants measured on 06/17/2005. SAR measurements were made within 24 hours of the measurement of liquid parameters. Freq. Rel. Condy (MHz) Perm. (S/m) 2450 38.51 1.738 2450MHz Body Liquid: Recipe: 73.3% distilled water 12.88% DGBE 12.88% triton X-100 0.84% salt 0.1% bactericide Di-electric constants measured on 06/17/2005. SAR measurements were made within 24 hours of the measurement of liquid parameters. Freq. Rel. Condy (MHz) Perm. (S/m) 2412 51.35 1.947 2437 51.70 1.959 2462 51.309 1.957 1

SAR Test Report No: SAR_958_2005_FCC_2450_5000_WLAN_BT_140 Date of Report: 8/29/2005 Page 2 of 11 Appendix C Miscellaneous 5 GHZ SAR Liquid: The recipes for the SAR liquids are not included in this report. The development of these liquids required significant time and expense from Cetecom Inc. We have experimented with some recipes that are being published and find that these are not valid recipes. Other companies are marketing 5 GHz SAR liquids, but will not divulge the recipes, even to their paying customers. Based on the competitiveness in this area we would prefer to keep our 5 GHz SAR liquid recipes confidential. 5200 MHz Head liquid: Di-electric constants measured on 6/24/2005. SAR measurements were made within 24 hours of the measurement of liquid parameters. Freq. Rel. Condy (MHz) Perm. (S/m) 5250 36.32 5.09 5200 MHz Body liquid: Di-electric constants measured on 6/24/2005. SAR measurements were made within 24 hours of the measurement of liquid parameters. Freq. Rel. Condy (MHz) Perm. (S/m) 5180 47.99 5.401 5260 47.72 5.459 5320 47.66 5.491 Dielectric measurement equipment verification Prior to measuring the dielectric parameters of the SAR liquids, reference liquids were measured. The conductivity and permitivity of Propanol and De-ionized water was measured and compared to published data. All of these measurements were within ± 1.5% of the published values. Environment: 06/17/2005 & 6/24/2005: Temperature: 20.1 °C – 23.9°C Humidity: 45% _ 55 % 2

SAR Test Report No: SAR_958_2005_FCC_2450_5000_WLAN_BT_140 Date of Report: 8/29/2005 Page 3 of 11 Appendix C Miscellaneous Test Equipment Test Equipment Model Serial Instrument Supplier / Model Serial No. Calibration Calibration description Manufacturer (date) Due (date) Mitsubishi supplied Bench top Robot RV-E2 EA1030108 N/A N/A by IndexSAR Upright shell phantom made by Antennessa SAM Phantom SAM 03FT26 04/03 N/A digitized and mounted by IndexSAR Flat Phantom IndexSAR HeadBox_Spout N/A N/A N/A Software IndexSAR SARA2 v0.420 N/A N/A N/A 2450 MHz Head Cetecom Inc. 2450 Head N/A 6/17/2005 N/A Tissue Simulant 2450 MHz body Cetecom Inc. 2450 Body N/A 6/17/2005 N/A Tissue Simulant 2450 MHz IndexSAR – IEEE IXD-245 0016 07/20/2004 07/20/2005 Dipole 1528 design 5200 MHz Head Cetecom Inc. 5200 Head N/A 6/24/2005 N/A Tissue Simulant 5200 MHz Body Cetecom Inc. 5200 Body N/A 6/24/2005 N/A Tissue Simulant 5250 MHz Cetecom Inc 5250 dipole N/A 3/7/2005 3/7/2006 Dipole Directional Werlatone C6529 11249 N/A N/A coupler RF Amplifier Vectawave VTL5400 N/A N/A N/A SAR Probe IndexSAR IXP-050 S/N 0123 10/07/2004 10/07/2005 Probe amplifier IndexSAR IXA-010 S/N 043 N/A N/A Thermometer Control Company 4039 20410549 11/20/2001 11/20/2005 Dielectric IndexSAR Di-Line N/A N/A N/A Measurement Kit 3

SAR Test Report No: SAR_958_2005_FCC_2450_5000_WLAN_BT_140 Date of Report: 8/29/2005 Page 4 of 11 Appendix C Miscellaneous Equipment Calibration/Performance Documents: Validation Dipoles Performance Measurements: Pages 5 to 11 Please Note: (The following pages of Appendix C show calibration documents. These calibration documents are inserted into this appendix. The header information with page numbering scheme is a part of this report and is included on all pages of the report and appendixes. This header is used to track all of the contents of this report.) 4

SAR Test Report No: SAR_958_2005_FCC_2450_5000_WLAN_BT_140 Date of Report: 8/29/2005 Page 5 of 11 Appendix C Miscellaneous Report No. SN0016_090-180-190-245 st July 1 2002 Revised 7/20/2004 INDEXSAR Validation Dipoles Type IXD-090, IXD-180, IXD-190 & IXD-245 Performance measurements S/N: 090-0016 S/N: 180-0016 S/N: 245-0016 S/N: 190-0016 MI Manning Indexsar, Oakfield House, Cudworth Lane, Newdigate, Surrey RH5 5DR. UK. Tel: +44 (0) 1306 631233 Fax: +44 (0) 1306 631834 e-mail: enquiries@indexsar.com 5

SAR Test Report No: SAR_958_2005_FCC_2450_5000_WLAN_BT_140 Date of Report: 8/29/2005 Page 6 of 11 Appendix C Miscellaneous 1. Measurement Conditions Measurements were performed using a box-shaped phantom made of PMMA with dimensions designed to meet the accuracy criteria for reasonably-sized phantoms that do not have liquid capacities substantially in excess of the volume of liquid required to fill the Indexsar upright SAM phantoms used for SAR testing of handsets against the ear. An HP 8753B vector network analyser was used for the return loss measurements. The dipole was placed in a special holder made of low-permittivity, low-loss materials. This holder enables the dipole to be positioned accurately in the centre of the base of the Indexsar box-phantom used for flat-surface testing and validation checks. The validation dipoles are supplied with special spacers made form a low-permittivity, low-loss foam material. These spacers are fitted to the dipole arms to ensure that, when the dipole is offered up to the phantom surface, the spacing between the dipole and the liquid surface is accurately aligned according to the guidance in the relevant standards documentation. The spacers are rectangular with a central hole equal to the dipole arm diameter and dimensioned so that the longer side can be used to ensure a spacing of 15mm from the liquid in the phantom (for tests at 900MHz and below) and the shorter side can be used for tests at 1800MHz and above to ensure a spacing of 10mm from the liquid in the phantom. The spacers are made on a CNC milling machine with an accuracy of 1/40th mm but they may suffer wear and tear and need to be replaced periodically. The material used is Rohacell, which has a relative permittivity of approx. 1.05 and a negligible loss tangent. The apparatus supplied by Indexsar for dipole validation tests thus includes: Balanced dipoles for each frequency required are dimensioned according to the guidelines given in IEEE 1528 [1]. The dipoles are made from semi-rigid 50 ohm co-ax, which is joined by soldering and is gold-plated subsequently. The constructed dipoles are easily deformed, if mis-handled, and periodic checks need to be made of their symmetry. Rohacell foam spacers designed for presenting the dipoles to 2mm thick PMMA box phantoms. These components also suffer wear and tear and should be replaced when the central hole is a loose-fit on the dipole arms or if the edges are too worn to ensure accurate alignment. The standard spacers are dimensioned for use with 2mm wall thickness (additional spacers are available for 4mm wall thickness). 6

SAR Test Report No: SAR_958_2005_FCC_2450_5000_WLAN_BT_140 Date of Report: 8/29/2005 Page 7 of 11 Appendix C Miscellaneous 2. SAR Measurement SAR validation checks using the dipoles can be performed with the box-phantom located on the SARA2 phantom support base on the SARA2 robot system. Tests may be conducted at a feed power level of 0.25W. However, the actual power level should be recorded and used to normalise the results obtained to the standard input power conditions of 1W (forward power). The results can then be compared with Table 8.1 in [1]. Brain liquids should be used so that measurement results can be compared with the (computed) reference values tabulated in IEEE 1528. 3. Dipole handling The dipoles are made from standard, copper-sheathed coaxial cable. In assembly, the sections are joined using ordinary soft-soldering. This is necessary to avoid excessive heat input in manufacture, which would destroy the polythene dielectric used for the cable. The consequence of the construction material and the assembly technique is that the dipoles are fragile and can be deformed by rough handling. Conversely, they can be straightened quite easily as described below: If a dipole is suspected of being deformed, a normal workshop lathe can be used as an alignment jig to restore the symmetry. To do this, the dipole is first placed in the headstock of the lathe (centred on the plastic or brass spacers) and the headstock is rotated by hand (do NOT use the motor). A marker (lathe tool or similar) is brought up close to the end of one dipole arm and then the headstock is rotated by 0.5 rev. to check the opposing arm. If they are not balanced, judicious deformation of the arms can be used to restore the symmetry. If a dipole has a failed solder joint, the dipole can be fixed down in such a way that the arms are co-linear and the joint re-soldered with a reasonably-powerful electrical soldering iron. Do not use gas soldering irons. After such a repair, electrical tests must be performed as described below. Please note that, because of their construction, the dipoles are short-circuited for DC signals. 4. Performance Measurement The dipoles are individually tested at their nominal frequency to ensure that they exhibit a return loss of less than -20dB when used with brain or body liquids. 7

SAR Test Report No: SAR_958_2005_FCC_2450_5000_WLAN_BT_140 Date of Report: 8/29/2005 Page 8 of 11 Appendix C Miscellaneous The dipoles are designed to have low return loss ONLY when presented against a lossy- phantom at the specified distance. If the user has a Vector Network Analyser (VNA) it is best to perform a return loss measurement on a specific dipole when it is in a measurement-location against a box phantom. If this is not the case, the return loss should be measured with the dipole positioned at the specified distance from a suitable container of lossy liquid. The distances specified in the standards are 15mm from the lossy liquid (900MHz and below) and 10mm from the liquid (1500MHz and above). The Indexsar foam spacers (described above) should be used to ensure this condition during measurement. S11 plots for the dipoles with nominal frequencies of 900MHz, 1800MHz and 2450MHz are shown below. Please note: plots below were recorded on 7/20/2004. IXD-090 8

SAR Test Report No: SAR_958_2005_FCC_2450_5000_WLAN_BT_140 Date of Report: 8/29/2005 Page 9 of 11 Appendix C Miscellaneous IXD-180 IXD-245 9

SAR Test Report No: SAR_958_2005_FCC_2450_5000_WLAN_BT_140 Date of Report: 8/29/2005 Page 10 of 11 Appendix C Miscellaneous IXD-190 5. Tuning the dipole The dipole dimensions are based on calculations that assumed specific liquid dielectric properties. If the liquid dielectric properties are somewhat different, the dipole tuning will also vary. A pragmatic way of accounting for variations in liquid properties is to ‘tune’ the dipole (by applying minor variations to its effective length). For this purpose, Indexsar can supply short brass tube lengths to extend the length of the dipole and thus ‘tune’ the dipole. It cannot be made shorter without removing a bit from the arm. An alternative way to tune the dipole is to use copper shielding tape to extend the effective length of the dipole. Do both arms equally. It should be possible to tune a dipole as described, whilst in place in the measurement position as long as the user has access to a VNA for determining the return loss. 6. Reference [1] Draft recommended practice for determining the peak spatial-average specific absorption rate (SAR) in the human body due to wireless communications devices: Experimental Techniques. 10

SAR Test Report No: SAR_958_2005_FCC_2450_5000_WLAN_BT_140 Date of Report: 8/29/2005 Page 11 of 11 Appendix C Miscellaneous 5 GHz Dipole Antennas Reference dipole antennas return loss measurements shown below. Measurements were made with the antennas 8 mm from the side of a flat phantom filled with SAR liquid for the frequency of the dipole. 5250 MHz Dipole S11 return loss: 11


Document Created: 2005-09-01 13:50:12
Document Modified: 2005-09-01 13:50:12
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