Mission Description

0587-EX-CN-2017 Text Documents

Raytheon IDS

2017-07-14ELS_195168

Raytheon Request for FCC Experimental license
File Number: 0587-EX-CN-2017

Date: 7/14/2017

Purpose of Operation:
Frequency authorization is being requested for the period of April 28, 2017 – October 20, 2017 in X-band
at frequencies between 9.55 – 9.65 GHz, in order to test prototype radar arrays in a relevant
environment. Outdoor testing, across multiple frequencies as noted above is required to assess
hardware compliance with requirements and to continue research and development. Up to two units
will be tested over this range simultaneously.

Technical Synopsis:

 Spectrum needed: 9.55 – 9.65 GHz

 ower levels requested: 160 W output power, 953.4 kW ER (peak)

 ocation of use: Devens, A

 Each antenna has a /- 45 degree scan angle

 Stop buzzer contacts: Nate iller (507-421-9830), Geoff Verbeke (508-490-1307), Karen Dyberg (508-
450-9236)

Operation Explanation:
The purpose of this request for Special Temporary Authorization is to test array compliance to RF
performance requirements in a relevant environment. Testing must begin as soon as possible to meet
scheduled deadlines.

Test Summary:

The system will transmit pulsed Frequency odulated (Chirp) waveforms. For all waveform types, the
maximum pulse duration is 55μs and the maximum duty factor is 22%. It is expected that the radars will
be operated periodically during the STA period, < 8 hours a day, up to 7 days a week, for the duration of
the STA.

RF Hazard Calculations and Site Safety easures:

Initial calculations show that general public exposure limits will be reached at a 2.25 meters distance
and occupational exposure limits at 1.0 meter, using formula (7) from FCC OET Bulletin 65 “Evaluating
Compliance with FCC Guidelines for Human Exposure to Radiofrequency Electromagnetic Fields”, dated
August 1997. These calculations take into account the highest duty factor of 22% and the raster scan
pattern utilized by the radar.

Raytheon’s RF safety group is involved in all testing that requires free space radiation to ensure that no
personnel are subjected to RF power density levels exceeding the aximum ermissible Exposure (E)
limits of the art 1.1310 of the FCC Rules and the guidelines in FCC’s OET Bulletin Number 65. An RF

Safety Control lan will be in place for the tests. The lan will define the procedures and controls
required to prevent personnel exposure to levels which exceed the E. To verify the safety of
personnel, an RF survey will be performed at the initial turn-on of the system. All measured levels,
where personnel have access, must be below the E limits before testing can proceed.

Raytheon Technical oint of Contact:

Nathan iller

System Engineering I&T ead

hone: 508-490-2980 (office), 507-421-9830 (cell)

Email: Nathan..iller@raytheon.com

Raytheon Spectrum anager filing application:

Karen Dyberg

Spectrum anagement/RF Safety

hone: 508-490-2723 (office), 508-450-9236 (cell)

Email: Karen.Dyberg@raytheon.com

eriod of Use:

Start date: April 28, 2017

End date: October 20, 2017

Equipment Information:

Indicate all equipment that will be involved in this operation.

Transmitter info:

anufacturer: Raytheon

odel: R3

Number of units: up to 6

Experimental (Y/N): Y

For each frequency band:

RF output at the transmitter terminals:

160 Watts peak

Effective radiated power from the antenna (if pulsed emission, specify peak power):

The effective radiated power from the antenna, including antenna transmit gain and front-end losses, is
953.4 kW (peak power).

EIR = ower * gain, ower = 160 W, gain = 39.9 dBi, EIR = 160 * 9772.37 = 1,563,597 W

ER = EIR/1.64 = 953402 W or 953.4 kW

Frequency Tolerance:

ess than 0.001 %

ist each type of emission separately for each frequency (basically list the emission designators)

The R3 can tune at 1 Hz intervals within the band(s) authorized.

For each tunable frequency authorized, the R3 has the following emission designators:

47Q3N - 55μsec F-ulsed () with a 2 Hz F chirp, centered at Ftune – 3 Hz

71Q3N - 6μsec F-ulsed (S) with a 2.5 Hz NF chirp, centered at Ftune  3 Hz

The transmit waveform chain-pulse sequence transmits a ong ulse () then a Short ulse (S) for
each pulse repetition interval (RI). The RI for a pulse sequence is 256 usec (RF = 3906.25 Hz). The
ong ulse () is 55 usec pulse length using a 2 Hz linear F chirp at a 22% duty factor. The Short
ulse (S) is a 6 usec pulse length using a 2.5 Hz non-linear F chirp at a 2.3% duty factor.

IORTANT: The pulse sequence requires 11.9 Hz ( necessary bandwidth/2  S necessary
bandwidth/2  6.0 Hz = 4.7/2 Hz  7.1/2 Hz  6.0 Hz = 11.9 Hz)

ist as appropriate for the type of modulation:

: inear Frequency-odulated ulsed (Chirp)

S: Non-inear Frequency-odulated ulsed (Chirp)

Necessary bandwidth. Explain how determined.

The necessary bandwidth was calculated using the equations in Annex J of the NTIA anual.

ocations:

The radars will be located on a trailer on the ground in Devens A, within 0.4 km of the following
coordinates: 42º 34’ 8.50” North, 071º 36’ 10.68” West.

Is a directional antenna (other than radar used)?No.

If yes, give the following info: (Although not necessary for this application, additional antenna detail is
provided below)

Width of beam in degrees at the half-power point:

1.98° Azimuth, 2.1° Elevation at boresight

Orientation in horizontal plane:

/- 45° Electronically Scanned

Orientation in vertical plane:

0° to 30°, relative to ground horizontal, electronically scanned

Will the antenna extend more than 6 meters above ground, or if mounted on an existing building, will it
extend more than 6 meters above the building, or will the proposed antenna be mounted on an existing
structure other than a building? No.

Overall height above ground to tip of antenna in meters:

No more 3 meters above ground level when installed on a trailer.

Document Created: 2017-07-14 10:37:44
Document Modified: 2017-07-14 10:37:44

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