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Test Information


The Electromagnetic Radiation (EMR), Electromagnetic Fields (EMF) and Radio Frequencies (RF) data available from multiple sources was thoroughly analyzed while developing and before testing the first commercially available AegisGuard™ products, AegisGuard™ Phone Radiation Shields in 1998 (superseded by AegisGuard™ LS Radiation Shields in 2005).

It has always been known radiation emitted by wireless products penetrate the body of the user when the products are in use. In recent years, it has also been confirmed that radiation penetration occurs when using wired products, and concerns expressed about the health effects at very low wireless product frequencies have been confirmed. The effects of the radiation and standards used to measure its effects upon the human body are still being debated by scientists, engineers and those in the medical profession.

It became evident early in the product development phase that the SAR (Specific Absorption Rate) test procedures developed by the United States Air Force, and used by regulatory agencies worldwide to determine the safety criteria for wireless product and network safety, is an inadequate standard for determining wireless heath risks (see SAR Overview for additional information).

  • 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.
  • Actual frequencies, along with the fields they carry are not measured. 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 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 none of the health effects attributed to non-ionizing radiation are thermally induced.
  • SAR standards are theoretical human body radiation absorption rate simulations calculated for non-ionizing temperatures (thermal), rather than actual near field radiation frequencies, which for most 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 for measuring frequencies, nor can it be used for non-rigid surfaces, such as clothing..
  • For wireless phones, SAR tests measure thermal emissions when placed 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 so that a phone can be positioned against it and the thickness of the disc varies, which affects the test results. Almost all of a wireless phone's radiation is generated by the radio system (transmitter and receiver), which in newer phone models is located away from the earpiece near the display or keypad. This affects SAR test results, particularly for full flip-style phones where the entire radio system is located in the lower half of the phone.

Rather than presenting calculated, estimated or simulated results and comparing them against globally disputed SAR thermal specifications, all AegisGuard™ Radiation Shield tests were conducted by three independent laboratories measuring RF before, and after, using AegisGuard™ Radiation Shields in multiple real-world environments. Test results were presented in decibels (dB) for older AegisGuard™ models, and actual frequency ranges with the fields they carry for newer models, including all AegisGuard L™ Series (LL, LP and LS) products.

In 1998, globally accepted test procedures developed by the American Society of Test and Measurement (ASTM D4935-99) were used, and custom shields were also made for radio modems to test the shielding effectiveness frequencies up to 2.6 GHz, which was higher than any wireless phone available at the time. The same procedures were used to test AegisGuard™ Wired Headset, (Life) Series and XP Radiation Shields at frequencies up to 2.6 GHz.

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 given to the IEEE. It still used by a few testing laboratories.

During the design phase of AegisGuard™ Life Series and XP Radiation Shields, it was understood that ASTM D4935-99 procedures could not be used for testing shielding effectiveness above 2.6 GHz. because they were not designed to do so. MIL-STD-285 was procedure that might have been used, but it was obsolete.

Although the frequency range of the new standard, designated IEEE-STD-299, is suitable for testing AegisGuard™ L Series and XP Radiation Shields, it too is for planar applications and not designed for testing products where the minimum dimension of any side of an enclosure is less than 2 meters (78 inches). Similar planar standards for secure, immovable flat surface testing are available, such as discontinued MIL-STD (USA) and 285 GJB 5792-2006 (China), do not measure frequencies or support 5G 300 and or 600 GHz. technologies applications and were not used.

Initial procedures for higher frequencies 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 in-house to RF to comply with our customers and testing laboratory objectives.

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 listed near the bottom of this page.

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. All models above 30 GHz. were initially developed under contract for specific customers, and tested by them and ourselves in-house prior to introduction as standard 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 all available industry and regulatory published safety standards.

Unless otherwise noted, the following table chronologically presents AegisGuard™ products tested in-house, by each independent laboratory and/or at customer facilities prior to product announcements.

AegisGuard Test
Reason For Test

Independent Laboratory and In-House Tests


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

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.




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
LAN, WAN, and MAN switch
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)

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



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
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 All AegisGuard™ L (Life) Series products:

120 GHz., 360 GHz. & 1.1 THz. @ 25 Watts standard products.
Customer wireless and fiber optic local and remote networks and devices.
2020 All AegisGuard™ L (Life) Series products:

120 GHz. & 360 GHz. @ 100 kilowatt custom products.

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


All AegisGuard™ L (Life) Series products:
3.2 THz. & 4.8 THz. @ 25 Watts custom product announcement.
Customer wireless and fiber optic local and remote networks and devices.

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
Vector Signal Generator With mmWave, MIMO, Beamforming, NR & V- / W- band Satellite Frequency Extender Keysight Technologies M9484C VXG 9 kHz. to 110 GHz.
PSG Vector Signal Generator Agilent E8267D 250 kHz. to 500 GHz.
Network Analyzer With mmWave 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 (fixed, flat surface test bed) 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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