[Federal Register Volume 76, Number 116 (Thursday, June 16, 2011)]
[Proposed Rules]
[Pages 35176-35181]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2011-14744]
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FEDERAL COMMUNICATIONS COMMISSION
47 CFR Part 15
[ET Docket Nos. 11-90 and 10-28; FCC 11-79]
Operation of Radar Systems in the 76-77 GHz Band
AGENCY: Federal Communications Commission.
ACTION: Proposed rule.
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SUMMARY: In this document the Commission proposes to amend rules to
enable enhanced vehicular radar technologies in the 76-77 GHz band to
improve collision avoidance and driver safety. Vehicular radars can
determine the exact distance and relative speed of objects in front of,
beside, or behind a car to improve the driver's ability to perceive
objects under bad visibility conditions or objects that are in blind
spots. These modifications to the rules will provide more efficient use
of spectrum, and enable the automotive and fixed radar application
industries to develop enhanced safety measures for drivers and the
general public. The Commission takes this action in
[[Page 35177]]
response to petitions for rulemaking filed by Toyota Motor Corporation
(``TMC'') and Era Systems Corporation (``Era'')
DATES: Comments must be filed on or before July 18, 2011, and reply
comments must be filed on or before August 1, 2011.
FOR FURTHER INFORMATION CONTACT: Aamer Zain, Office of Engineering and
Technology, (202) 418-2437, e-mail: Aamer.Zain@fcc.gov, TTY (202) 418-
2989.
ADDRESSES: You may submit comments, identified by ET Docket Nos. 11-90
and 10-28, by any of the following methods:
Federal Communications Commission's Web Site: http://fjallfoss.fcc.gov/ecfs2/. Follow the instructions for submitting
comments.
Mail: Aamer Zain, Electronics Engineer, Office of
Engineering and Technology, 445 12th Street, SW., Room 7-A110,
Washington, 20554
People with Disabilities: Contact the FCC to request
reasonable accommodations (accessible format documents, sign language
interpreters, CART, etc.) by e-mail: FCC504@fcc.gov or phone: 202-418-
0530 or TTY: 202-418-0432.
For detailed instructions for submitting comments and additional
information on the rulemaking process, see the SUPPLEMENTARY
INFORMATION of this document.
SUPPLEMENTARY INFORMATION: This is a summary of the Commission's Notice
of Proposed Rule Making, ET Docket No. 11-90, FCC 11-79, adopted May
24, 2011 and released May 25, 2011. The full text of this document is
available for inspection and copying during normal business hours in
the FCC Reference Center (Room CY-A257), 445 12th Street, SW.,
Washington, DC 20554. The complete text of this document also may be
purchased from the Commission's copy contractor, Best Copy and
Printing, Inc., 445 12th Street, SW., Room, CY-B402, Washington, DC
20554. The full text may also be downloaded at: http://www.fcc.gov.
Comment Period and Procedures
Pursuant to Sec. Sec. 1.415 and 1.419 of the Commission's rules,
47 CFR 1.415, 1.419, interested parties may file comments and reply
comments on or before the dates indicated on the first page of this
document. Comments may be filed using: (1) The Commission's Electronic
Comment Filing System (ECFS), (2) the Federal Government's eRulemaking
Portal, or (3) by filing paper copies. See Electronic Filing of
Documents in Rulemaking Proceedings, 63 FR 24121 (1998).
Electronic Filers: Comments may be filed electronically
using the Internet by accessing the ECFS: http://fjallfoss.fcc.gov/ecfs2/.
Paper Filers: Parties who choose to file by paper must
file an original and one copy of each filing. If more than one docket
or rulemaking number appears in the caption of this proceeding, filers
must submit two additional copies for each additional docket or
rulemaking number.
Filings can be sent by hand or messenger delivery, by commercial
overnight courier, or by first-class or overnight U.S. Postal Service
mail. All filings must be addressed to the Commission's Secretary,
Office of the Secretary, Federal Communications Commission.
All hand-delivered or messenger-delivered paper filings
for the Commission's Secretary must be delivered to FCC Headquarters at
445 12th St., SW., Room TW-A325, Washington, DC 20554. The filing hours
are 8 a.m. to 7 p.m. All hand deliveries must be held together with
rubber bands or fasteners. Any envelopes and boxes must be disposed of
before entering the building.
Commercial overnight mail (other than U.S. Postal Service
Express Mail and Priority Mail) must be sent to 9300 East Hampton
Drive, Capitol Heights, MD 20743.
U.S. Postal Service first-class, Express, and Priority
mail must be addressed to 445 12th Street, SW., Washington DC 20554.
People with Disabilities: To request materials in accessible
formats for people with disabilities (braille, large print, electronic
files, audio format), send an e-mail to fcc504@fcc.gov or call the
Consumer & Governmental Affairs Bureau at 202-418-0530 (voice), 202-
418-0432 (tty).
Summary of Notice of Proposed Rulemaking
1. In the Notice of Proposed Rule Making (NPRM), the Commission
proposes to modify Sec. Sec. 15.35 and 15.253 of its rules to enable
enhanced vehicular radar technologies in the 76-77 GHz band to improve
collision avoidance and driver safety. Vehicular radars can determine
the exact distance and relative speed of objects in front of, beside,
or behind a car to improve the driver's ability to perceive objects
under bad visibility conditions or objects that are in blind spots. The
Commission proposes to eliminate the existing requirement that
vehicular radars decrease power when the vehicle on which the radar is
mounted is stopped, or not in motion, and to expand the authorization
for unlicensed 76-77 GHz band radars to allow their use in fixed
infrastructure systems. These modifications to the rules will provide
more efficient use of spectrum, and enable the automotive and fixed
radar application industries to develop enhanced safety measures for
drivers and the general public. This action is taken in response to
petitions for rulemaking filed by Toyota Motor Corporation (TMC) and
Era Systems Corporation (Era).
2. The 76-77 GHz band offers advantages for vehicular and fixed
radar systems, such as precise real-time monitoring of the position and
speed of vehicles. The Commission's proposals are intended to foster
the development of improved radar systems that offer significant safety
benefits to the general public. The Commission also foresees economic
benefits such as economies of scale and broader marketplace demand that
may be attained if both the U.S. and other markets use the 76-77 GHz
band for fixed and vehicular radar systems. Furthermore, the Commission
believes that the changes in power levels and use suggested by TMC and
Era will not result in any increased potential of interference to
licensed services.
3. TMC filed a petition for rulemaking requesting that the emission
limits be modified for vehicular radar systems operating within the 76-
77 GHz band. Specifically, TMC requested that the Commission eliminate
the ``in-motion'' and ``not-in-motion'' distinctions in the emission
limits for vehicular radar systems and establish a single emission
limit that applies in all directions from a vehicle.
4. The Commission believes there is merit to TMC's request to
modify the emissions limits for vehicular radar systems, and to
eliminate the ``in-motion'' and ``not-in-motion'' distinction in limits
for millimeter wave vehicular radar systems. Therefore, the Commission
proposes to modify its rules for vehicular radar systems operating in
the 76-77 GHz band as TMC requests. The Commission proposes to modify
Sec. 15.253 of its rules to increase the average power density limit
to 50 dBm (88 [mu]W/cm\2\ at 3 m) and decrease the peak power density
limit to 55 dBm (279 [mu]W/cm\2\ at 3m) for vehicular radar systems
regardless of the illumination direction of the vehicular radar system
as reflected in the proposed rules set forth in Appendix A. The
Commission seeks comments on this proposal. The proposed emission
limits would extend to vehicular radar systems illuminating in any of
the mentioned directions (forward, rear or side). This action would
make the rules
[[Page 35178]]
governing the vehicular radar emission limit in United States to be
more comparable to those set forth outside the United States and
therefore benefit the automotive industry in terms of new product
development and cost reduction.
5. The existing separate in-motion and not-in-motion emission
limits were adopted to prevent unnecessary and prolonged harmful human
exposure to RF radiation. The motion status of the vehicle was given
special consideration due the fact that vehicles that are not in motion
could result in human exposure to radiation for longer time durations
than a moving vehicle. However, because the proposed emission limit of
88 [mu]W/cm\2\ is below the current average threshold limit of 1 mW/
cm\2\ adopted for human exposure to RF radiation, the in-motion and
not-in-motion criteria become unnecessary for safety purposes. The
Commission therefore proposes emission limits independent of the motion
status of the vehicle. The Commission seeks comments on these
proposals.
6. In proposing the new emission limit, the Commission recognizes
NRAO's concerns about possible interference, but note that the peak
limit recommended by Toyota is lower than the current peak limit. This
reduced limit will increase the level of interference protection
afforded to RAS systems and other authorized users of the 76-77 GHz
band. The Commission agrees with TMC's assessment that there is very
little likelihood that vehicular radar systems operating at either the
current or proposed limits would cause harmful interference to radio
astronomy equipment. Accordingly, the Commission believes that there is
no need to restrict vehicular radar systems based on coordination zones
or to impose requirements for a GPS-aware automatic cut-off switch as
proposed by NRAO. The Commission invites comment on this analysis.
7. The Commission also seeks comment on TMC's request to modify
Sec. 15.253 of its rules to specify a limit on peak EIRP instead of
average power density as an alternative to, or in addition to, the
limits currently specified in the rules. Furthermore, it proposes to
modify Sec. 15.35(b) of the Commission's rules to reflect the fact
that the proposed peak emission limit is not 20 dB above the average
emission limit.
8. In its petition, Era requests that the Commission amend Sec.
15.253 of its rules to permit the use of 76-77 GHz unlicensed fixed
radars at airports for monitoring terrestrial vehicle movements. Era
contends that when the rules limiting operation to vehicle-mounted
radars were adopted, there was no practical experience with vehicular
radars in the 76-77 GHz band, and the rules were made very conservative
to assure that such radars would not receive interference from other
users of the band. Era contends that subsequent experience in other
countries has shown that the requirement that radars operate only on
moving vehicles is overly restrictive. It requests that the Commission
relax this requirement and suggests several alternative approaches for
modifying the rules to allow fixed radar use, primarily at airports.
The suggested approaches are: (1) Limit fixed radars to airports and
other applications that do not illuminate public roads; (2) require
either compliance with the ETSI standard or strict compatibility
testing for any system that illuminates public roads; or (3) mandate
compliance with the ETSI standard for all 76 GHz radar systems. Era
does not express a preference for which of these approaches it believes
the Commission should adopt.
9. The Commission agrees with Era that the current rules should be
relaxed to allow the operation of fixed radars in the 76-77 GHz band on
an unlicensed basis. It therefore proposes to permit fixed radars to
operate in the 76-77 GHz band in addition to vehicular radar systems,
and to require that such fixed radar systems meet the proposed limits
for vehicular radar systems as well as the maximum permissible RF
exposure levels set forth in the rules. The Commission believes that,
based on Era's representations, use of the fixed radar devices in this
band will enhance public safety by enabling applications such as
monitoring vehicles on the ground at airports. However, the Commission
is not proposing to limit operation to monitoring vehicles or to
specific locations such as airports or other place's where fixed radars
would not illuminate public roads. The Commission believes that Era's
suggested alternative approaches and proposals may be overly
restrictive and could cause unnecessary burdens for the public if
implemented. Implementation of certain elements of these approaches
could require licensing and/or coordination that would be burdensome
for both users of the devices and the Commission with no corresponding
benefits in terms of reduction of interference potential to licensed
services or improved co-existence between unlicensed devices. The
Commission's proposal to permit fixed radar applications is less
restrictive and could be more beneficial to public than the proposals
requested by Era. The Commission believes that fixed radars operating
at the same maximum power levels as vehicle-mounted radars will be less
likely to interfere with the RAS and Radiolocation services than
vehicle-mounted radars because the location where they are used would
not change. The Commission also believes that fixed radars should be
able to co-exist with vehicular radars because they would both operate
with the same power level and because both would use antennas with
narrow beamwidths, thus reducing the chances that the signal from one
radar would be within the main lobe of the receive antenna of the
other. In a worst case scenario where two radars are aimed directly at
each other, fixed radar should have no more impact on a vehicular radar
system than another vehicular system would.
10. The Commission seeks comment on whether it should allow
unlicensed fixed radar applications to operate within the 76-77 GHz
band, and on the appropriateness of the proposed power levels. The
Commission also seeks comment on whether there is a need to limit fixed
radar applications to specific locations such as airports and/or
locations where they are not aimed at publicly accessible roads as
suggested by Era, or if some alternative criteria would be more
appropriate. Commenters recommended operational restrictions such as
these should also address how they could be practically enforced for
unlicensed devices. In addition, the Commission seeks comment on
whether specific technical requirements are necessary to allow co-
existence of fixed and vehicular radars in the 76-77 GHz band (e.g.,
antenna height, operational frequency or power limits), and whether it
should require fixed or vehicular radars to comply with a standard such
as the ETSI EN 301 91 standard referenced by Era.
Initial Regulatory Flexibility Analysis
11. As required by the Regulatory Flexibility Act of 1980, as
amended (RFA),\1\ the Commission has prepared this present Initial
Regulatory Flexibility Analysis (IRFA) of the possible significant
economic impact on small entities by the policies and rules proposed in
this Notice of Proposed Rule Making (NPRM). Written public comments are
requested on this IRFA. Comments must be identified as responses to the
IRFA and must be filed by the deadlines specified in the NPRM
[[Page 35179]]
for comments. The Commission will send a copy of this NPRM, including
this IRFA, to the Chief Counsel for Advocacy of the Small Business
Administration (SBA).\2\ In addition, the NPRM and IRFA (or summaries
thereof) will be published in the Federal Register.\3\
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\1\ See 5 U.S.C. 603. The RFA, see 5 U.S.C. 601-612, has been
amended by the Small Business Regulatory Enforcement Fairness Act of
1996, (SBREFA) Public Law 104-121, Title II, 110 Stat. 857 (1996).
\2\ See 5 U.S.C. 603(a).
\3\ See 5 U.S.C. 603(a).
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A. Need for, and Objectives of, the Proposed Rules
12. This NPRM responds to petitions for rulemaking filed by Toyota
Motor Corporation (``TMC'') and Era Systems Corporation (``Era'')
requesting modifications to Sec. 15.253 of the Commission's rules for
vehicular radar systems operating in the 76-77 GHz band. Vehicular
radars can determine the exact distance and relative speed of objects
in front of, beside, or behind a car to improve the driver's ability to
perceive objects under bad visibility conditions or objects that are in
blind spots. Some examples of vehicular radar systems include collision
warning and mitigation systems, blind spot detection systems, lane
change assist and parking aid systems. The NPRM proposes to eliminate
the requirement that vehicular radars decrease power when the vehicle
on which the radar is mounted is stopped, or not in motion, and to
expand the use of unlicensed 76-77 GHz band radars to fixed
infrastructure systems. These modifications to the rules will provide
more efficient use of spectrum, and enable the automotive and fixed
radar application industries to develop enhanced safety measures for
drivers and the general public.
B. Legal Basis
13. This action is authorized under sections 1, 4(i), 302, 303(f)
and (r), 332, and 337 of the Communications Act of 1934, as amended, 47
U.S.C. 1, 4(i), 154(i), 302, 303(f) and (r), 332, 337.
C. Description and Estimate of the Number of Small Entities to Which
the Proposed Rule Will Apply
14. The RFA directs agencies to provide a description of, and,
where feasible, an estimate of, the number of small entities that may
be affected by the rules adopted herein.\4\ The RFA generally defines
the term ``small entity'' as having the same meaning as the terms
``small business,'' ``small organization,'' and ``small governmental
jurisdiction.'' \5\ In addition, the term ``small business'' has the
same meaning as the term ``small business concern'' under the Small
Business Act.\6\ A ``small business concern'' is one which: (1) Is
independently owned and operated; (2) is not dominant in its field of
operation; and (3) satisfies any additional criteria established by the
Small Business Administration (SBA).\7\
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\4\ 5 U.S.C. 604(a)(3).
\5\ 5 U.S.C. 601(6).
\6\ 5 U.S.C. 601(3) (incorporating by reference the definition
of ``small-business concern'' in the Small Business Act, 15 U.S.C.
632). Pursuant to 5 U.S.C. 601(3), the statutory definition of a
small business applies ``unless an agency, after consultation with
the Office of Advocacy of the Small Business Administration and
after opportunity for public comment, establishes one or more
definitions of such term which are appropriate to the activities of
the agency and publishes such definition(s) in the Federal
Register.''
\7\ 15 U.S.C. 632.
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15. Radio and Television Broadcasting and Wireless Communications
Equipment Manufacturing. The Census Bureau defines this category as
follows: ``This industry comprises establishments primarily engaged in
manufacturing radio and television broadcast and wireless
communications equipment. Examples of products made by these
establishments are: transmitting and receiving antennas, cable
television equipment, GPS equipment, pagers, cellular phones, mobile
communications equipment, and radio and television studio and
broadcasting equipment.'' \8\ The SBA has developed a small business
size standard for Radio and Television Broadcasting and Wireless
Communications Equipment Manufacturing, which is: all such firms having
750 or fewer employees.\9\ According to Census Bureau data for 2002,
there were a total of 1,041 establishments in this category that
operated for the entire year.\10\ Of this total, 1,010 had employment
of under 500, and an additional 13 had employment of 500 to 999.\11\
Thus, under this size standard, the majority of firms can be considered
small.
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\8\ U.S. Census Bureau, 2002 NAICS Definitions, ``334220 Radio
and Television Broadcasting and Wireless Communications Equipment
Manufacturing''; http://www.census.gov/epcd/naics02/def/NDEF334.HTM#N3342.
\9\ 13 CFR 121.201, NAICS code 334220.
\10\ U.S. Census Bureau, American FactFinder, 2002 Economic
Census, Industry Series, Industry Statistics by Employment Size,
NAICS code 334220 (released May 26, 2005); http://factfinder.census.gov. The number of ``establishments'' is a less
helpful indicator of small business prevalence in this context than
would be the number of ``firms'' or ``companies,'' because the
latter take into account the concept of common ownership or control.
Any single physical location for an entity is an establishment, even
though that location may be owned by a different establishment.
Thus, the numbers given may reflect inflated numbers of businesses
in this category, including the numbers of small businesses. In this
category, the Census breaks-out data for firms or companies only to
give the total number of such entities for 2002, which was 929.
\11\ Id. An additional 18 establishments had employment of 1,000
or more.
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D. Description of Projected Reporting, Recordkeeping, and Other
Compliance Requirements
16. Radars operating in the 76-77 GHz band are required to be
authorized under the Commission's certification procedure as a
prerequisite to marketing and importation, and the NPRM proposes no
change to that requirement. However, it proposes to eliminate the
requirement that a radar must reduce power when a vehicle is not in
motion and to establish a single emission limit that applies in all
directions from a vehicle. The NPRM also proposes to permit fixed
radars to operate in the 76-77 GHz band under the same limits proposed
for vehicular radar systems.
E. Steps Taken To Minimize Significant Economic Impact on Small
Entities, and Significant Alternatives Considered
17. The RFA requires an agency to describe any significant
alternatives that it has considered in reaching its proposed approach,
which may include the following four alternatives (among others): (1)
The establishment of differing compliance or reporting requirements or
timetables that take into account the resources available to small
entities; (2) the clarification, consolidation, or simplification of
compliance or reporting requirements under the rule for small entities;
(3) the use of performance, rather than design, standards; and (4) an
exemption from coverage of the rule, or any part thereof, for small
entities.\12\
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\12\ See 5 U.S.C. 603(c).
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18. The proposals contained in this NPRM are deregulatory in
nature, which we expect will simplify compliance requirements for all
parties, particularly small entities, and permit the development of
improved radar systems. Elimination of requirement for radars to reduce
power when a vehicle is not in motion will simplify equipment design,
and establishment of a single emission limit that applies in all
directions from a vehicle would allow the development of omni-
directional monitoring systems. Permitting fixed radar devices in the
76-77 GHz band would enable the development of applications such as
monitoring the movement of vehicles on the ground at airports.
F. Federal Rules That May Duplicate, Overlap, or Conflict With the
Proposed Rule
19. None.
[[Page 35180]]
Ordering Clauses
20. Pursuant to Sec. Sec. 1, 4, 301, 302(a), and 303(b), (c) and
(f) of the Communications Act of 1934, as amended, 47 U.S.C. 151, 154,
301, 302a(a), and 303(b), (c) and (f), the notice of proposed
rulemaking is hereby adopted.
21. The Commission's Consumer and Governmental Affairs Bureau,
Reference Information Center, shall send a copy of the notice of
proposed rulemaking, including the Initial Regulatory Flexibility
Certification, to the Chief Counsel for Advocacy of the Small Business
Administration.
22. Pursuant to sections 1, 2, 4(i), 301, 302, and 303(f) of the
Communications Act of 1934, 47 U.S.C. 151, 152, 154(i), 301, 301, and
303(f), that this Notice of Proposed Rulemaking is hereby adopted.
23. The Commission's Consumer and Governmental Affairs Bureau,
Reference Information Center, shall send a copy of this Notice of
Proposed Rulemaking, including the Initial Regulatory Flexibility
Analysis, to the Chief Counsel for Advocacy of the Small Business
Administration.
List of Subjects in 47 CFR Part 15
Communications equipment, Radio.
Federal Communications Commission.
Marlene H. Dortch,
Secretary.
For the reasons set forth in the preamble, the Federal
Communications Commission proposes to amend 47 CFR part 15 as follows:
PART 15--RADIO FREQUENCY DEVICES
1. The authority citation for part 15 continues to read as follows:
Authority: 47 U.S.C. 154, 302a, 303, 304, 307, 336 and 544a.
2. Section 15.35 is amended by revising paragraph (b) to read as
follows:
Sec. 15.35 Measurement detector functions and bandwidths.
* * * * *
(b) Unless otherwise specified, on any frequency or frequencies
above 1000 MHz, the radiated emission limits are based on the use of
measurement instrumentation employing an average detector function.
Unless otherwise specified, measurements above 1000 MHz shall be
performed using a minimum resolution bandwidth of 1 MHz. When average
radiated emission measurements are specified in this part, including
average emission measurements below 1000 MHz, there also is a limit on
the peak level of the radio frequency emissions. Unless otherwise
specified, e.g., see Sec. Sec. 15.250, 15.252, 15.253(b), 15.255, and
15.509 through 15.519, the limit on peak radio frequency emissions is
20 dB above the maximum permitted average emission limit applicable to
the equipment under test. This peak limit applies to the total peak
emission level radiated by the device, e.g., the total peak power
level. Note that the use of a pulse desensitization correction factor
may be needed to determine the total peak emission level. The
instruction manual or application note for the measurement instrument
should be consulted for determining pulse desensitization factors, as
necessary.
* * * * *
3. Section 15.253 is revised to read as follows:
Sec. 15.253 Operation within the bands 46.7-46.9 GHz and 76.0-77.0
GHz.
(a) Operation within the band 46.7-46.9 GHz is restricted to
vehicle-mounted field disturbance sensors used as vehicle radar
systems. The transmission of additional information, such as data, is
permitted provided the primary mode of operation is as a vehicle-
mounted field disturbance sensor. Operation under the provisions of
this section is not permitted on aircraft or satellites.
(1) The radiated emission limits within the bands 46.7-46.9 GHz are
as follows:
(i) If the vehicle is not in motion, the power density of any
emission within the bands specified in this section shall not exceed
200 nW/cm\2\ at a distance of 3 meters from the exterior surface of the
radiating structure.
(ii) For forward-looking vehicle mounted field disturbance sensors,
if the vehicle is in motion the power density of any emission within
the bands specified in this section shall not exceed 60 [mu]W/cm\2\ at
a distance of 3 meters from the exterior surface of the radiating
structure.
(iii) For side-looking or rear-looking vehicle-mounted field
disturbance sensors, if the vehicle is in motion the power density of
any emission within the bands specified in this section shall not
exceed 30 [mu]W/cm\2\ at a distance of 3 meters from the exterior
surface of the radiating structure.
(iv) The provisions in Sec. 15.35 limiting peak emissions apply.
(2) [Reserved]
(b) Operation within the band 76.0-77.0 GHz is restricted to
vehicle-mounted field disturbance sensors used as vehicle radar systems
and to fixed radar systems. The transmission of additional information,
such as data, is permitted provided the primary mode of operation is as
a vehicle-mounted field disturbance sensor or as a fixed field
disturbance sensor. Operation under the provisions of this section is
not permitted on aircraft or satellites.
(1) The radiated emission limits within the bands 76.0-77.0 GHz are
as follows:
(i) The average power density of any emission within the bands
specified in this section shall not exceed 88 [micro]W/cm\2\ at a
distance of 3 meters from the exterior surface of the radiating
structure.
(ii) The peak power density of any emission within the bands
specified in this section shall not exceed 279 [micro]W/cm\2\ at a
distance of 3 meters from the exterior surface of the radiating
structure.
(2) [Reserved]
(c) The power density of any emissions outside the operating band
shall consist solely of spurious emissions and shall not exceed the
following:
(1) Radiated emissions below 40 GHz shall not exceed the general
limits in Sec. 15.209.
(2) Radiated emissions outside the operating band and between 40
GHz and 200 GHz shall not exceed the following:
(i) For field disturbance sensors operating in the band 46.7-46.9
GHz:
2 pW/cm\2\ at a distance of 3 meters from the exterior surface of
the radiating structure.
(ii) For field disturbance sensors operating in the band 76-77 GHz:
600 pW/cm\2\ at a distance of 3 meters from the exterior surface of
the radiating structure.
(3) For radiated emissions above 200 GHz from field disturbance
sensors operating in the 76-77 GHz band: The power density of any
emission shall not exceed 1000 pW/cm\2\ at a distance of 3 meters from
the exterior surface of the radiating structure.
(4) For field disturbance sensors operating in the 76-77 GHz band,
the spectrum shall be investigated up to 231 GHz.
(d) Fundamental emissions must be contained within the frequency
bands specified in this section during all conditions of operation.
Equipment is presumed to operate over the temperature range -20 to +50
degrees Celsius with an input voltage variation of 85% to 115% of rated
input voltage, unless justification is presented to demonstrate
otherwise.
(e) Regardless of the power density levels permitted under this
section, devices operating under the provisions of this section are
subject to the radiofrequency radiation exposure
[[Page 35181]]
requirements specified in Sec. Sec. 1.1307(b), 2.1091 and 2.1093 of
this chapter, as appropriate. Applications for equipment authorization
of devices operating under this section must contain a statement
confirming compliance with these requirements for both fundamental
emissions and unwanted emissions. Technical information showing the
basis for this statement must be submitted to the Commission upon
request.
[FR Doc. 2011-14744 Filed 6-15-11; 8:45 am]
BILLING CODE 6712-01-P