friday, session 6 - paper 5 regulating and standardizing...

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Regulating and Standardizing Directive Antenna Patterns to Improve Coexistence

Dr. Haim Mazar

RF Spectrum Management and Engineering

h.mazar@atdi.com

IEEE MTT 2018 Texas Symposium on Wireless and Microwave Circuits and Systems

Baylor University, Waco, Texas

April 5-6, 2018

Friday, Session 6 - Paper 5

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Outline

• Regulation & standardization of ant. patterns is essential to optimize the RF spectrum re-usage

• ITU, ETSI and FCC provide the most useful reference envelopes around the world

• ETSI limits are more restrictive than FCC and the 2018 revision of ITU pattern is significant

• New theoretical evidence for the proposed revision of ITU Recommendation and amendments to restrict FCC and to loosen ETSI standards

• Future work: revision of other ITU antenna patterns such as F.758 and M.1336

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RxA ant sidelobe gets interference from TxB signal

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Mti-799001 (2’, 49.2 dBi, 71 GHz D/λ=154 θ3=0.50) with or without update

F. 10699- 0

0

Off-axis angle (degrees)

–80

Ant

enn

a g

ain

(dB

i)

20 40 60 80 100 120 140 160 180

–40

–20

0

20

40

60

Rec. ITU-R F.699 recommends 2.1.1 MT-799001

Rec. ITU-R F.699 recommends 2.1.2

–60

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F.699 patterns vs square and circular apertures; explaining 32- 25 log j for j < 120

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ETSI RPEs for class 4 antennas in 71– 86 GHz

when XPD angle > 150, no difference between parallel and XPD sidelobes

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Co-polar; 10.6 GHz; ITU, ETSI, FCC versus RFS-UXA4

RFS UXA4 is valid FCC category A and ETSI class 2, not ETSI class 4: sidelobes above 900 are higher than the class 4 limit

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CP; 72 GHz; ITU, ETSI, FCC, MT-799001

MT799001 is valid FCC category A and ETSI class 4

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XPD; 72 GHz; ETSI, FCC, measurement

MT799001 is valid FCC and ETSI class 4

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Summary

• Similar to the policy of ‘laissez faire laissez passer’ for Tx

spurious emissions, for antenna patterns Europe is more

restrictive than USA and Japan

• Europe having many borders among countries (relative to USA

& Japan) & Europe being more condensed than US in

population

• In USA real antenna patterns are more restrictive than FCC

masks; Americas may aim to category A limits

• The 2018 F.699 envelope, proposed by the author, offers

improved spectrum sharing (also for 5G backhaul networks),

while maintaining system performance and implementation

feasibility

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The IEEE text is found at https://ieeexplore.ieee.org/abstract/document/8400643/ & http://mazar.atwebpages.com/Downloads/AntennasPatterns_2018_IEEE_Texas_Mazar_8400643_2018-04-06.pdf