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AegisGuardRadiation Shields
Tests & Shielding Performance


Introduction

Adverse health effects caused by electrical and wireless product radiation penetrating the body were first reported in the 1950's. These effects, and testing standards used worldwide to define exposure limits and safety, have resulted in ongoing global controversy and debates by scientists, engineers and medical professionals since the early 1990's.

Initially discovered during radio modem product development in 1988, it became apparent during initial the initial AegisGuard consumer product development effort in 1997 that SAR (Specific Absorption Rate) thermal heat measurement test procedures developed by the United States Air Force, and used by regulatory agencies worldwide as the criteria for establishing wireless product and network safety standards, was inadequate for determining wireless heath risks (see SAR Overview for additional information). In fact, to this day not one of the adverse heath effects risks are caused, or exacerbated, by heat.

  • SAR standards were not designed to measure cumulative effects upon the body, and there has never been a study stating, without caveats, wireless products meeting these standards are safe.
  • SAR test procedures do not measure frequencies or the fields they carry. Existing SAR standards were created by the United States Air Force after placing a healthy 28 year old male in a sunny, hot, humid environment for 61 minutes, measuring his temperature rectally, and calculating estimated safe thermal thresholds for his individual body organs. Decibel (dB) measurements are used for testing every other aspect of wireless communications and products, including older AegisGuard™ products. Newer technologies, and despite numerous studies confirming that wireless radiation far below the thermal level is harmful to human health, the SAR standard, and shielding effectiveness expressed in dB continues to be used by carriers, regulatory agencies and shielding product manufacturers.  It is important to recognize not one of the adverse health effects attributed to non-ionizing wireless radiation are thermally induced. 
  • SAR standards are theoretical human body radiation absorption rate simulations calculated for non-ionizing temperatures (thermal), rather than actual RF, which for other shielding products is measured in decibels (dB) using planar (flat surface) immovable fixed surfaces. dB is the global standard unit of measurement used to determine the absolute ratio, or comparison, of voltage, power, gain, loss, and frequency signal levels. It is not used to measure frequencies, or surfaces which are not rigid, such as clothing.
  • For wireless phones, SAR tests measure thermal emissions by positioning speaker against the ear of a plastic model head for a brief amount of time; typically less than 9 minutes. The outside of the model's ear has a rubber disc, the thickness of the which varies and affects the results. Wireless phone radiation is generated by multiple internal radio transmitters and receivers supporting multiple wireless generation technologies; i.e. 5G,  inside the phone, and antennas positioned around the perimeter.

Safety Standards
On June 25, 1956, the United States Department of Defense (DoD) approved the use of planar attenuation testing measurement standards and procedures designated as MIL-STD-285 for the electromagnetic shielding of building entrances, doors and large electronic equipment access panels. DoD formally discontinued using this standard on October 24, 1997 after the responsibility for developing and maintaining a new standard was transferred to IEEE. It still used by a few testing laboratories for low frequency testing.

It was apparent during the AegisGuard™ Life Series and XP Radiation Shields design phase ASTM D4935-99 and MIL-STD-285 planar flat surface tests were unreliable for testing shielding effectiveness above 2.6 GHz. because they were not designed to do so. The current IEEE-STD-299 planar testing standards are suitable for testing AegisGuard™ Life (L) Series and XP Radiation Shields up to actual 18 GHz. (2006) and estimated 40 GHz. (2019) frequencies are not approved for flat rigid surfaces larger than 2 meters (78 inches), including homes and offices, or flexible surfaces fabrics. Comparable planar standards, such as China's GJB 5792-2006 exist, however none of them measure or test actual RF, nor can they be used to test 4G-LTE, 5G or forthcoming 6G carrier networks.

Initial procedures for higher frequency testing were developed in-house to measure the shielding effectiveness of AegisGuard™ Life Series and XP Radiation Shields with the same type of test equipment used by electronic product manufacturers, including wireless phones manufacturers and carriers, and the same procedures were used to test AegisGuard™ L Series Radiation Shields. Initial test results using these procedures were also presented in dB, and upgraded to RF to comply with customer and testing laboratory objective.

AegisGuard™ Tests
Instead of using test equipment with calculated, estimated or simulated test procedures, and comparing the results against SAR safety standards, tests measured RF in multiple real-world environments with, and without, AegisGuard™ Radiation Shields. Results were initially presented in decibels (dB) for older AegisGuard™ products less than 30 GHz., and RF ranges with the fields they carry for newer models, including all AegisGuard L™ Series (LL, LP and LS) standard and custom products.

Globally accepted safety standards for 4G-LTE, 5G and future 6G operating frequencies above 96 GHz. do not exist. Shielding effectiveness results for frequencies above 96 GHz presented in specification pages on this website are derived from in-house generated frequencies, customer live device, network and sampling test data for custom products, and simulations. In all instances, shielding effectiveness exceeded available industry and regulatory published safety standards.

All models above 30 GHz. were initially developed under contract for specific customers, and tested by them and in-house prior to introduction as standard products. Unless otherwise noted, identical tests were conducted by three independent laboratories. The frequencies, power levels and shielding effectiveness presented on individual product specification pages appearing on this website were derived using test equipment comparable to our in-house test equipment.

The following table chronologically presents AegisGuard™ products tested using ASTM D4935-99, MIL-STD 285, IEEE-STD-299, and proposed IEEE 802.11ac, ad, ax - ETSI EN 302 567 procedures.

Chronological Testing, or  Skip to Test Equipment.


Year
AegisGuard Test
Reason For Test

Independent Laboratory and In-House Tests
1998
 

2005

AegisGuard™ Phone Radiation Shields.
New product announcement.

Discontinued - superseded by AegisGuard™ LS Radiation Shields.

Each product tested for 8 hours.
31 analog and digital cell phones.
2 cordless phones.
4 radio modems.
2001 AegisGuard™ Headset Radiation Shields.
New product announcement.
Each headset was tested for 8 hours
7 headsets used with 15 cell phones
2002 AegisGuard™ XP Radiation Shields.
New product announcement.
Each product was tested for:
8 hour
s

5 digital cell phones with and without headsets and/or other AegisGuard shields
4 radio modems
1 handheld communicator
1 portable computer
1 radar gun

24 hours
2 pilot helmets
6 law enforcement and military body worn communicators.

 

 

2004


2005
AegisGuard™ LS 30 GHz. Radiation Shields.
     3 month field test - 450 participants.
     No skin or allergic reactions reported.   
New product announcement.

 

2004 product tests for 8 hours; 2005 product tests for 24 hours.
Wireless Products
2 analog and 11 digital cell phones
4 cordless phones
1 satellite phone
2 handheld communicators
2 pagers
2 mobile radios
4 wireless headsets, including 2 Bluetooth
2 body wear communicators
2 GPS monitors
1 radio modem
1 automated toll collection transponder
2 Wi-Fi computer peripherals
Wired Products
1 office copy machine
1 commercial color copy machine
1 desktop computer
1 portable computer
3 hospital medical equipment
1 broadband router
1 data, fax and voice gateway
1
LAN, WAN, and MAN switch
Other
1 commercial & 1 military aircraft cockpit and cabin
1 welding apron
1 cap
1 hospital patient bed fabric curtain
NOTE: Superseded
using AegisGuard™ LL in 2006
1 - 8 x 10 ft
(2.44 x 3.05 m) room adjacent to power lines (4 walls, ceiling, door and window)
NOTE: Superseded
using AegisGuard™ LP in 2006
1 - 10 x 10 ft
(3.05 x 3.05 m) room adjacent to a cellular tower (4 walls, ceiling, door and 2 windows)
2005


2006
AegisGuard™ LL Radiation Shields.
     6 month field test - 100 participants.
     No skin or allergic reactions reported.
New product announcement.
Each washable garment was tested for 24 hours. Garments were 100% cotton, polyester, wool, linen, silk, nylon, or combinations thereof.
4 each: male, female, child and infant undergarments
4 each: shirts, blouses, pants, skirts and sweaters.
2 each: laboratory aprons and smocks
1 hospital patient bed fabric curtain
1 cap
2005

2006

 

AegisGuard™ LP Radiation Shields.
     12 month field test - 6 participants.
New product announcement
.
6 homes (all interior sides of exterior walls, doors and trim, and all ceilings) were tested for a continuous 1 year period from September, 2005 through August, 2006.
2 homes in Germany
2 homes in Japan
2 homes in United States
NOTE:
AegisGuard™ LS was used to shield windows.
2009 AegisGuard™ L (Life) Series Radiation Shields

100% increase of lower and upper frequency range shielding effectiveness at 40% greater power levels measured at point of contact.

End use product sampling tests to confirm shielding effectiveness.
2011 All AegisGuard™ L (Life) Series products.

Shielding compound shape changed from smooth to ridged, or jagged, for all models, providing diffused (scattered) reflection for all shielded surfaces and applications.

Lot sampling tests to confirm shielding effectiveness and scattering consistency.
2011 All AegisGuard™ L (Life) Series products.

Custom models up to 120 GHz.

Customer Enterprise LAN's.
2013 All AegisGuard™ L (Life) Series products.

Custom models up to 360 GHz.

Customer Enterprise LAN's and WAN's.
2015 All AegisGuard™ L (Life) Series products.

Custom models up to 1.1 THz.

Customer wireless and fiber optic local and remote networks and devices.
 

2019

2020

2021

All AegisGuard™ L (Life) Series products:

120 GHz., 360 GHz. & 1.1 THz. @ 25 Watts standard products.

120 GHz., 360 GHz. & 1.1 THz. @ 100 kilowatt custom products.

3.2 to 4.8 THz. @ 25 Watts custom product announcement.

Customer wireless and fiber optic local and remote networks and devices.


TEST EQUIPMENT
Electrical and 1G - 5G and forthcoming initial 6G EMF and RF 5 Hz. to 1.1 THz.

In-house test equipment is presented below. OEM, carrier, other similar technologically advanced customers, including three independent laboratories conducting AegisGuard
tests, use equipment with comparable specifications. Equipment is always calibrated and maintained according to the manufacturer's instructions prior to testing, and random sampling tests of  each production lot are tested prior to packaging.

RF and EMF test configurations vary according to frequencies, power levels, products, networks, and/or indoor and outdoor test surfaces.

 
Equipment Model Frequency Range
PSG Vector Signal Generator Agilent E8267D 250 kHz. to 500 GHz.
Network Analyzer With Millimeter-Wave Controller And Frequency Extenders Agilent N5251A
Agilent 5262A 4 Port Test Set
Virginia Diodes WR1.0-VNAX
10 MHz. to 1.1 THz.
Vector Network Analyzer Anritsu MS46524B 140 kHz. to 92 GHz.
Spectrum Analyzer Agilent 8565EC 30 MHz. to 50 GHz.
Power Meter Agilent E4419B 9 kHz. to 110 GHz.
Power Sensors Agilent 8460, 8480, 8487A 100 kHz. to 50 GHz.
Frequency Counter Agilent AGL 53150A/001 10 Hz. to 20 GHz.
Tektroniks DC250 1 Hz. to 175 MHz.
Analog And Digital
Communications Test Set
Acterna Stabilock 4032 Wireless operating
frequencies above 2.0 GHz.
Attenuators, Filters, Fixed Oscillators, Splitters And Mixers (various, as required for calibration)

Electrical and wireless planar 5 Hz. to 18 GHz. EMF and RF (extended to 40 GHz.).
Equipment configurations varied according to the product or generated signal and power level being tested. The most frequently used configuration is below.
 
AegisGuard XP test equipment
 

Consolidated test results are presented on AegisGuard™ LL, LP, LS, XP and Headset Features pages.
 

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