Radio Frequency – Electromagnetic Energy (RF-EME)
Compliance Report
Prepared for:
Motorola Solutions
c/o Pyramid Network Solutions
6519 Towpath Road
East Syracuse, NY 13057
Site No. BWCC21
Turquoise
Turquoise Drive
Hercules, California 94547
Contra Costa County
37.99353; -122.27025
EBI Project No. 62120999
April 10, 2013
RF-EME Compliance Report
EBI Project No. 62120999
Site No. BWCC21
Turquoise Drive, Hercules, California
TABLE OF CONTENTS
EXECUTIVE SUMMARY..................................................................................................................... 2
1.0
SITE DESCRIPTION ................................................................................................................ 3
2.0
FEDERAL COMMUNICATIONS COMMISSION (FCC) REQUIREMENTS ................................... 3
3.0
WORST-CASE PREDICTIVE MODELING RESULTS ................................................................. 6
4.0
SUMMARY AND CONCLUSIONS ............................................................................................. 6
5.0
LIMITATIONS ......................................................................................................................... 7
APPENDICES
Appendix A
Appendix B
Appendix C
Appendix D
Appendix E
Certifications
Antenna Inventory
RoofView® Export File
RoofView® Graphic
Microwave Modeling
21 B Street Burlington, MA 01803 1.800.786.2346
1
RF-EME Compliance Report
EBI Project No. 62120999
Site No. BWCC21
Turquoise Drive, Hercules, California
EXECUTIVE SUMMARY
Purpose of Report
EnviroBusiness Inc. (dba EBI Consulting) has been contracted by Motorola Solutions, to conduct radio
frequency electromagnetic (RF-EME) modeling for Motorola Site BWCC21 located at Turquoise Drive
in Hercules, California to determine RF-EME exposure levels from existing Motorola wireless
communications equipment at this site. As described in greater detail in Section 2.0 of this report, the
Federal Communications Commission (FCC) has developed Maximum Permissible Exposure (MPE)
Limits for general population exposures and occupational exposures. This report summarizes the
results of RF-EME modeling in relation to relevant FCC RF-EME compliance standards for limiting
human exposure to RF-EME fields.
. This report contains a detailed summary of the RF EME analysis for the site, including the following:
Antenna Inventory for existing antenna installations
Graphical representation of theoretical MPE fields based on modeling
This document addresses the compliance of Motorola’s transmitting facilities independently and in
relation to all collocated facilities at the site.
Statement of Compliance
A site is considered out of compliance with FCC regulations if there are areas that exceed the FCC
exposure limits and there are no RF hazard mitigation measures in place. Any carrier which has an
installation that contributes more than 5% of the applicable MPE must participate in mitigating these RF
hazards.
As presented in the sections below, based on worst-case predictive modeling, there are no modeled
areas on any accessible ground-level walking/working surface related to the existing antennas that
exceed the FCC’s occupational or general population exposure limits at this site. However, there are
areas where workers elevated above the ground may be exposed to power densities greater than the
general population and occupational limits. Workers and the general public should be informed about
the presence and locations of antennas and their associated fields.
21 B Street Burlington, MA 01803 1.800.786.2346
2
RF-EME Compliance Report
EBI Project No. 62120999
1.0
Site No. BWCC21
Turquoise Drive, Hercules, California
SITE DESCRIPTION
This project involves the proposed installation of three (3) Motorola panel antennas and two (2)
microwave antennas on a tower in Hercules, California. The microwave antennas will be oriented 58°
and 223.5˚ from true north, transmitting within the 18000 and 23000 MHz. frequency ranges. The panel
antennas will be transmitting at a frequency of 700 MHz. For modeling purposes, it was assumed that
one transmitter will operate for each sector. The Sector A antenna will be oriented 0˚ from true north.
The Sector B antenna will be oriented 120˚from true north. The Sector C antenna will be oriented 240˚
from true north. The bottoms of the panel antennas will be 31.8 feet above the ground. The bottom of
the first microwave antenna will be 25 feet above the ground. The bottom of the other microwave
antenna will be 40 feet above the ground.
Appendix B presents an antenna inventory for the site.
Access to this site is accomplished by elevating workers to antenna level. In addition, the lattice tower
is surrounded by a gated fence. As such, the general public is not able to access the antennas.
2.0
FEDERAL COMMUNICATIONS COMMISSION (FCC) REQUIREMENTS
The FCC has established Maximum Permissible Exposure (MPE) limits for human exposure to
Radiofrequency Electromagnetic (RF-EME) energy fields, based on exposure limits recommended by the
National Council on Radiation Protection and Measurements (NCRP) and, over a wide range of
frequencies, the exposure limits developed by the Institute of Electrical and Electronics Engineers, Inc.
(IEEE) and adopted by the American National Standards Institute (ANSI) to replace the 1982 ANSI
guidelines. Limits for localized absorption are based on recommendations of both ANSI/IEEE and
NCRP.
Radio frequency waves are electromagnetic waves from the portion of the electromagnetic spectrum at
frequencies lower than visible light and microwaves. The wavelengths of radio waves range from
thousands of meters to around 30 centimeters. These wavelengths correspond to frequencies as low as
3 cycles per second (or hertz [Hz]) to as high as one gigahertz (one billion cycles per second).
The FCC guidelines incorporate two separate tiers of exposure limits that are based upon
occupational/controlled exposure limits (for workers) and general population/uncontrolled exposure
limits for members of the general public. Access to this site is considered uncontrolled. Additional
information regarding controlled and uncontrolled exposure limits is provided below.
Occupational/controlled exposure limits apply to situations in which persons are exposed as a
consequence of their employment and in which those persons who are exposed have been made fully
aware of the potential for exposure and can exercise control over their exposure. Occupational/
controlled exposure limits also apply where exposure is of a transient nature as a result of incidental
passage through a location where exposure levels may be above general population/uncontrolled limits
(see below), as long as the exposed person has been made fully aware of the potential for exposure and
can exercise control over his or her exposure by leaving the area or by some other appropriate means.
General population/uncontrolled exposure limits apply to situations in which the general public may
be exposed or in which persons who are exposed as a consequence of their employment may not be
made fully aware of the potential for exposure or cannot exercise control over their exposure.
Therefore, members of the general public would always be considered under this category when
exposure is not employment-related, for example, in the case of a telecommunications tower that
exposes persons in a nearby residential area.
21 B Street Burlington, MA 01803 1.800.786.2346
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RF-EME Compliance Report
EBI Project No. 62120999
Site No. BWCC21
Turquoise Drive, Hercules, California
Table 1 and Figure 1 (below), which are included within the FCC’s OET Bulletin 65, summarize the MPE
limits for RF emissions. These limits are designed to provide a substantial margin of safety. They vary
by frequency to take into account the different types of equipment that may be in operation at a
particular facility and are “time-averaged” limits to reflect different durations resulting from controlled
and uncontrolled exposures.
The FCC’s MPEs are measured in terms of power (mW) over a unit surface area (cm2). Known as the
power density, the FCC has established an occupational MPE of 5 milliwatts per square centimeter
(mW/cm2) and an uncontrolled MPE of 1 mW/cm2 for equipment operating above the 1500 MHz
frequency range. For the Motorola equipment operating at 700 MHz, the FCC’s occupational MPE is
2.83 mW/cm2 and an uncontrolled MPE of 0.57 mW/cm2. These limits are considered protective of
these populations.
Table 1. FCC OET 65 Non-Occupational Radiofrequency Exposure Limits for the General Public
Maximum Allowed
Frequency Range
Mean Squared Electric Field
2
Strength (V/m)
W ave Mean Squared Magnetic
2
Field Strength (A/m)
Equivalent Plane Free Space
2
Power Density (mW/cm )
300kHz - 1.34MHz
1.34MHz-30MHz
30MHz-300MHz
300MHz-1500MHz
1500MHz-100GHz
376,996
2
678,976/f
756
-
2.657
2
4.976/f
0.005
-
100.0
2
180/f
0.2
f/1500
1.0
Equivalent Plane Free Space
2
Power Density (mW/cm )
100.0
2
900/f
1.0
f/300
5.0
Power Density (mW/cm2)
Table 2. FCC OET 65 Occupational Radiofrequency Exposure Limits for Employees
Maximum Allowed
Mean Squared Electric Field
Wave Mean Squared Magnetic
Frequency Range
2
2
Strength (V/m)
Field Strength (A/m)
0.3MHz - 3MHz
376,996
2.657
2
2
3392964/f
23.911/f
3MHz-30MHz
30MHz-300MHz
3,770
0.027
300MHz-1500MHz
1500MHz-100GHz
-
Based on the above, the most restrictive thresholds for exposures of unlimited duration to RF energy
for several personal wireless services are summarized below:
21 B Street Burlington, MA 01803 1.800.786.2346
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RF-EME Compliance Report
EBI Project No. 62120999
Personal Wireless Service
Broadband Radio (BRS) /
Educational Broadband (EBS)
Personal Communication (PCS)
Cellular Telephone
Specialized Mobile Radio
Most Restrictive Freq, Range
Site No. BWCC21
Turquoise Drive, Hercules, California
Approximate
Frequency
Occupational
MPE
Public MPE
2600 MHz
5.00 mW/cm2
1.00 mW/cm2
1,950 MHz
870 MHz
855 MHz
30-300 MHz
5.00 mW/cm2
2.90 mW/cm2
2.85 mW/cm2
1.00 mW/cm2
1.00 mW/cm2
0.58 mW/cm2
0.57 mW/cm2
0.20 mW/cm2
MPE limits do not represent levels where a health risk exists, since they are designed to provide a
substantial margin of safety. These limits apply for continuous exposures and are intended to provide a
prudent margin of safety for all persons, regardless of age, gender, size, or health.
Wireless facilities used by Motorola in this area operate within a frequency range of 700 MHz as well as
18000 GHz and 18000 GHz. Facilities typically consist of: 1) electronic transceivers (the radios or
cabinets) connected to wired telephone lines; and 2) antennas that send the wireless signals created by
the transceivers to be received by individual subscriber units. Transceivers are typically connected to
antennas by coaxial cables.
Because of the short wavelength of wireless services, the antennas require line-of-site paths for good
propagation, and are typically installed above ground level. Antennas are constructed to concentrate
energy towards the horizon, with as little energy as possible scattered towards the ground or the sky.
This design, combined with the low power of Motorola’s wireless antennas, generally results in no
possibility for exposure to approach Maximum Permissible Exposure (MPE) levels, with the exception of
areas directly in front of the antennas.
21 B Street Burlington, MA 01803 1.800.786.2346
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RF-EME Compliance Report
EBI Project No. 62120999
3.0
Site No. BWCC21
Turquoise Drive, Hercules, California
WORST-CASE PREDICTIVE MODELING RESULTS
EBI performed theoretical modeling using RoofView® software to estimate the worst-case power
density at the site ground-level resulting from operation of the proposed antennas. RoofView® is a
widely-used predictive modeling program that has been developed by Richard Tell Associates to predict
both near field and far field RF power density values for roof-top and tower telecommunications sites
produced by vertical collinear antennas that are typically used in the BRS, cellular, PCS, paging and other
communications services. The models utilize several operational specifications for different types of
antennas to produce a plot of spatially-averaged power densities that can be expressed as a percentage
of the applicable exposure limit.
There were six (6) omni directional whip antennas as well as three (3) microwave antennas by unknown
carriers on the lattice tower. These antennas were included in the modeling analysis using generic worst
case specifications.
For this report, EBI utilized antenna and power data provided by Motorola, and compared the resultant
worst-case MPE levels to the FCC’s exposure limits outlined in OET Bulletin 65 . The assumptions used
in the modeling are based upon information provided by Motorola and information gathered from other
sources. The parameters used for modeling Motorola antennas are summarized in the modeling export
file presented in Appendix C. There are no other wireless carriers with equipment installed at this site.
Based on worst-case predictive modeling, there are no modeled areas on any accessible ground-level
walking/working surface related to the existing Motorola antennas that exceed the FCC’s occupational
or general population exposure limits at this site. All exposures above the FCC’s safe limits require that
individuals be elevated above the ground. In order to alert any such elevated workers, signage is
recommended for installation at the base of the tower to warn workers and the general public of the
presence of RF-emitting equipment and of any associated hazards.
The inputs used in the modeling are summarized in the RoofView® export file presented in Appendix C.
A graphical representation of the RoofView® modeling results is presented in Appendix D.
Microwave dish antennas are designed for point-to-point operations at the elevations of the installed
equipment rather than ground level coverage. RoofView® is not suitable for modeling them. However,
formulas for OET Bulletin 65 were used to calculate a worst-case prediction of the maximum power
density (MPE) at ground level and nearest walking surfaces for the Motorola microwave dishes. Power
density estimates used for the microwave dishes proposed for installation at this site are included in
Appendix E, and are included in the following MPE levels when appropriate.
At ground level, the maximum power density generated by the proposed Motorola microwave and
panel antennas as well as the unknown carrier antennas is approximately 9.1 percent of the FCC’s
general population limit (1.82 percent of the FCC’s occupational limit).
4.0
SUMMARY AND CONCLUSIONS
EBI has prepared this Radiofrequency Emissions Compliance Report for the existing Motorola
telecommunications equipment at the site located at Turquoise Drive in Hercules, California.
EBI has conducted theoretical modeling to estimate the worst-case power density from Motorola
antennas to document potential MPE levels at this location and ensure that site control measures are
adequate to meet FCC and OSHA requirements. As presented in the preceding sections, based on
worst-case predictive modeling, there are no modeled exposures on any accessible ground-level
21 B Street Burlington, MA 01803 1.800.786.2346
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RF-EME Compliance Report
EBI Project No. 62120999
Site No. BWCC21
Turquoise Drive, Hercules, California
walking/working surface related to existing equipment in the area that exceed the FCC’s occupational
and general population exposure limits at this site. As such, the existing Motorola project is in
compliance with FCC rules and regulations.
RF-EME Signage is recommended for installation in accordance with Motorola’s signage policy to alert
workers and the general public of the presence of RF-emitting equipment at this site and of the potential
hazards associated with accessing the equipment. Signage is required by the FCC for all RF-transmitting
facilities.
5.0
LIMITATIONS
This report was prepared for the use of Motorola Solutions. It was performed in accordance with
generally accepted practices of other consultants undertaking similar studies at the same time and in the
same locale under like circumstances. The conclusions provided by EBI are based solely on the
information provided by the client. The observations in this report are valid on the date of the
investigation. Any additional information that becomes available concerning the site should be provided
to EBI so that our conclusions may be revised and modified, if necessary. This report has been prepared
in accordance with Standard Conditions for Engagement and authorized proposal, both of which are
integral parts of this report. No other warranty, expressed or implied, is made.
21 B Street Burlington, MA 01803 1.800.786.2346
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RF-EME Compliance Report
EBI Project No. 62120999
Site No. BWCC21
Turquoise Drive, Hercules, California
Appendix A
Certifications
21 B Street Burlington, MA 01803 1.800.786.2346
RF-EME Compliance Report
EBI Project No. 62120999
Site No. BWCC21
Turquoise Drive, Hercules, California
Preparer Certification
I, Glenn Gould, state that:
I am an employee of Envirobusiness Inc. (d/b/a EBI Consulting), which provides RF-EME safety
and compliance services to the wireless communications industry.
I have successfully completed RF-EME safety training, and I am aware of the potential hazards
from RF-EME and would be classified “occupational” under the FCC regulations.
I am familiar with the FCC and OSHA rules and regulations both in general and as they apply to
RF-EME exposure.
I have been trained in on RF-EME modeling using RoofView® modeling software.
I have reviewed the data collected during the site survey and provided by the client and
incorporated it into this Site Compliance Report such that the information contained in this
report is true and accurate to the best of my knowledge.
21 B Street Burlington, MA 01803 1.800.786.2346
RF-EME Compliance Report
EBI Project No. 62120999
Site No. BWCC21
Turquoise Drive, Hercules, California
Appendix A
Antenna Inventory
21 B Street Burlington, MA 01803 1.800.786.2346
RF-EME Compliance Report
EBI Project No. 62120999
Site No. BWCC21
Turquoise Drive, Hercules, California
Antenna
Number
Operator
TX Freq
(MHz)
Gain
(dBd)
Azimuth
(deg.)
Length
(ft)
Horizontal
Beamwidth
(Deg.)
MOT A1
Motorola
700
13.35
0
6.34
67
X
Y
Antenna
Base Height
Above
Nearest
Walking
Surface (z)
MPE
Occupational
Exceedance
(feet)
MPE
General
Population
Exceedance
(feet)
4
2
2
31.83
0
0
31.83
0
0
31.83
0
0
MOT B1
Motorola
700
13.35
120
6.34
67
MOT C1
Motorola
Microwave 1
Motorola
Microwave 2
Unknown
Carrier
Microwave 1
Motorola
700
13.35
240
6.34
67
3
4
2
Motorola
18000
39.1
58
2
N/A
3
4
25
0
0
Motorola
23000
36.2
223.5
1
N/A
4
2
40
0
0
Unknown
Carrier
80000
49.85
Unknown
2
N/A
2
2
20
0
0
Unknown
Carrier
Microwave 2
Unknown
Carrier
Unknown
Carrier
80000
49.85
Unknown
2
N/A
20
0
0
Unknown
Carrier
Microwave 3
Unknown
Carrier
80000
49.85
Unknown
2
N/A
44
0
0
Bay Web 1
Bay Web
850
12
0
8
360
55
0
0
Bay Web 2
Bay Web
850
12
0
8
360
55
0
0
Bay Web 3
Bay Web
850
12
0
8
360
55
0
0
Bay Web 4
Bay Web
850
12
0
8
360
55
0
0
Bay Web 5
Bay Web
850
12
0
8
360
47
0
0
Bay Web 6
Bay Web
850
12
0
8
360
47
0
0
21 B Street Burlington, MA 01803 1.800.786.2346
3
4
4
3
5
3
1
3
3
2
4
2
1
2
4
1
RF-EME Compliance Report
EBI Project No. 62120999
Site No. BWCC21
Turquoise Drive, Hercules, California
Appendix C
Roofview® Export File
21 B Street Burlington, MA 01803 1.800.786.2346
Map, Settings, Antenna, and Symbol Data Table .. Exported from workbook -> Roof View RF Template_Moto Composite.xls
Done on 5/7/2012 at 11:21:50 AM.
Use this format to prepare other data sets for the RoofView workbook file.
You may use as many rows in this TOP header as you wish.
The critical point are the cells in COLUMN ONE that read 'Start...' (eg. StartMapDefinition)
If used, these (4) headers are required to be spelled exactly, as one word (eg. StartMapDefinition)
The very next row will be considered the start of that data block.
The first row of the data block can be a header (as shown below), but this is optional.
When building a text file for import, Add the Map info first, then the Antenna data, followed by the symbol data.
All rows above the first marker line 'Start...' will be ignored, no matter how many there are.
This area is for you use for documentation.
End of help comments.
You can place as much text here as you wish as long as you don't place it below
the Start Map Definition row below the blue line.
You may insert more rows using the Insert menu.
Should you need additional lines to document your project, simply insert additional rows
by highlighting the row number adjacent to the blue line below and then clicking on the Insert menu
and selecting rows.
StartMapDefinition
Roof Max Y
Roof Max X Map Max YMap Max X Y Offset X Offset
Number of Areas
envelope
50
50
60
90
10
10
1 $U$161:$BR$210
$U$161:$BR$210
StartSettingsData
Standard
Method
Uptime Scale Factor Low Thr Low Color Mid Thr Mid Color Hi Thr
Hi Color Over Color Ap Ht Mult Ap Ht Method
4
2
1
1
100
1
500
4
5000
2
3
1.5
1
StartAntennaData
It is advisable to provide an ID (ant 1) for all antennas
(MHz)
Trans
Trans
Coax
Coax
Other
Input
Calc
(ft)
(ft)
ID
Name
Freq
Power
Count
Len
Type
Loss
Power
Power
Mfg
Model
X
Y
MOT A1
Motorola
700
65.59
1
Kathrein
80010735 2.945205 3.60274
MOT B1
Motorola
700
65.59
1
Kathrein
80010735 3.835616 2.027397
MOT C1
Motorola
700
65.59
1
Kathrein
80010735 2.027397 2.027397
BAYWB1
Bay Web 1
850
100
1
Other
Whip
3.013699 4.287671
BAYWB2
Bay Web 1
850
100
1
Other
Whip
5.164384 2.410959
BAYWB3
Bay Web 1
850
100
1
Other
Whip
3.09589 0.767123
BAYWB4
Bay Web 1
850
100
1
Other
Whip
0.863014 2.356164
BAYWB5
Bay Web 1
850
100
1
Other
Whip
3.013699 4.287671
BAYWB6
Bay Web 1
850
100
1
Other
Whip
3.09589 0.767123
StartSymbolData
Sym
Map Marker
Roof X
Roof YDescription
Map Label( notes for this table only )
Sym
5
35
AC UnitSample symbols
Sym
14
5
Roof Access
Sym
45
5
AC Unit
Sym
45
20
Ladder
List Of Areas
$U$161:$BR$210
(ft)
Z
31.83
31.83
31.83
55
55
55
55
45
45
Type
VC
VC
VC
VC
VC
VC
VC
VC
VC
(ft)
Aper
6.34
6.34
6.34
8
8
8
8
8
8
dBd
Gain
14
14
14
12
12
12
12
12
12
BWdth
Pt Dir
67;0
67;120
67;240
0;360
0;360
0;360
0;360
0;360
0;360
Uptime
Profile
ON
flag
ON•
ON•
ON•
ON•
ON•
ON•
ON•
ON•
ON•
RF-EME Compliance Report
EBI Project No. 62120999
Site No. BWCC21
Turquoise Drive, Hercules, California
Appendix D
Roofview ® Graphic
21 B Street Burlington, MA 01803 1.800.786.2346
Lattice Tower
*For Clarity, Other
Carrier Antennas
are Not Shown.
Motorola Antennas
Power density is less than the FCC’s uncontrolled MPE. Individuals may work freely within the blue exposure control
areas.
Distance [feet] in front of the antennas and direction of areas where power density is greater than the FCC’s
uncontrolled MPE, but less than the FCC’s occupational MPE. Occupational exposure in these areas should be limited to
less than 30 minutes unless proper personal protective equipment is utilized by qualified individuals with proper safety
training. Access by the general public should not be allowed.
Distance [feet] in front of the antennas and direction of areas where power density is greater than the FCC’s
occupational MPE. Occupational exposure in these areas should be limited to brief incursions by qualified individuals with
proper safety training. Generally, other individuals should be restricted from entering this area until they have contacted
Clearwire who will turn off their transmitter using OSHA-approved lockout/tagout procedures.
Roofview: Composite Exposure Levels
Facility Operator: Motorola Solutions
Site Name: Turquoise
Site Number: BWCC21
Report Date: 04-10-13
RF-EME Compliance Report
EBI Project No. 62120999
Site No. BWCC21
Turquoise Drive, Hercules, California
Appendix E
Microwave Modeling
21 B Street Burlington, MA 01803 1.800.786.2346
5
Motorola Microwave 1
Motorola Microwave 2
Unknown Carrier Microwave 1
Unknown Carrier Microwave 2
Unknown Carrier Microwave 3
Model/Description
Tower
Ground
Total Number of
Frequency
(MHz)
18000
23000
80000
80000
80000
AGL/ARL
(ft)
25
40
20
20
44
ERP
(Watts)
298.6456216
160.3821946
50
50
50
Microwave Dishes
Are the antennas installed on a roof or a tower?
Nearest Walking Surface
Estimation of Power Density from Microwave Dishes
Site Number:
BWCC21
Gain
(dBd)
39.1
36.2
49.85
49.85
49.85
Diameter
(ft)
2
1
2
2
3
Gen Pop Limit
(mW/cm2)
1.000000
1.000000
1.000000
1.000000
1.000000
Occ Limit
(mW/cm2)
5.000000
5.000000
5.000000
5.000000
5.000000
0.01* 4 * P
A
0.43132%
Uncontrolled
Outside
Column
(% MPE)
0.08258%
0.34589%
0.00116%
0.00116%
0.00052%
0.09%
Controlled
Outside
Column
(% MPE)
0.017%
0.069%
0.000%
0.000%
0.000%
outside of transmitting column, power is ~ 1% of that inside column
0.00431316
Power Density
Ground
(mW/cm2)
0.000826
0.003459
0.000012
0.000012
0.000005
" Summary of Nearfield Power Density Calculations for EBI Consulting", July 21, 2006
TOTAL
Power Density
Inside Column
(mW/cm2)
0.082581
0.345892
0.001163
0.001163
0.000517
Min Dist from
Atenna
(ft)
2
2
2
2
2
2