RF E xposur e Pr oc e dur e s Pr e se nte r : Jake Novic ky - - PowerPoint PPT Presentation

RF E xposur e Pr

• c e dur

e s

Pr e se nte r : Jake Novic ky T CB Wor kshop Nove mbe r 2019

F e de ra l Co mmunic a tio ns Co mmissio n Offic e o f E ng ine e ring a nd T e c hno lo g y L a b o ra to ry Divisio n

(E d ito ria l c ha ng e s – ma rke d in re d - ma d e a fte r the pre se nta tio n to fix e rro rs)

Ove r vie w

SPL SR Ho tspo t Co mb ina tio n Do ng le s with E xte rna l Swive l Ante nna s Ha ll E ffe c t/ G-Se nso rs fo r la pto ps/ ta b le ts Po rta b le WPT Applic a tio ns mmWa ve Sc a n Re q uire me nts

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SPL SR Hotspot Combination

Mo de rn de vic e s with sma ll fo rm fa c to rs ha ve a n inc re a sing numb e r o f tra nsmitte rs in c lo se pro ximity

– Ma ny de vic e s ha ve 10+ tra nsmitte rs

SPL SR pro c e dure o utline d in F CC K DB Pub lic a tio n 447498 D01 is re q uire d to b e use d ve ry o fte n SPL SR pro c e dure is inhe re ntly c o nse rva tive

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SPL SR Hotspot Combination

F

• r de vic e s who se simulta ne o us SAR is >

1.6 W/ kg a nd who do no t me e t the SPL SR c rite ria , e nla rg e d zo o m sc a n/ vo lume sc a n pro c e dure is a va ila b le T his pro c e dure c a n b e q uite time c o nsuming , e spe c ia lly fo r de vic e s whe re a nte nna s a re spa tia lly se pa ra te d Ofte n ne e de d o nly b e c a use o ne c o - lo c a te d a nte nna pa ir do e s no t me e t SPL SR

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SPL SR Hotspot Combination

Hyb rid SPL SR a nd e nla rg e d zo o m sc a n/ vo lume sc a n a ppro a c h no w b e ing c o nside re d Will re q uire a L a b K DB I nq uiry a nd a PAG Ca n o nly b e a pplie d whe n simulta ne o us tra nsmissio n SAR is > 1.6 W/ kg , it do e s no t me e t SPL SR c rite ria , a nd a nte nna pa ir is c o - lo c a te d T e st Pro c e dure

– Pe rfo rm e nla rg e d zo o m sc a n/ vo lume sc a n o n the c o -lo c a te d a nte nna pa ir to de te rmine 1g / 10g a g g re g a te SAR – Apply SPL SR pro c e dure fo r the spa tia lly se pa ra te d a nte nna a nd a g g re g a te SAR distrib utio n o f the c o - lo c a te d a nte nna pa ir

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SPL SR Hotspot Combination

Wha t is me a nt b y a nte nna c o - lo c a tio n?

– Ante nna s a re no t sig nific a ntly spa tia lly se pa ra te d – De pe nds o n de vic e fo rm fa c to r a nd a nte nna imple me nta tio n – SAR distrib utio ns o ve rla p

• E

xa c t pa ra me te rs fo r o ve rla p a re no t ye t de fine d

– Will b e a sse sse d o n a c a se b y c a se b a sis

T his is pre limina ry g uida nc e , sub je c t to c ha ng e

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SPL SR Hotspot Combination

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Dongle with E xte r nal Swive l Ante nnas

Ge ne ra l g uida nc e fo r do ng le s c a n b e fo und in F CC K DB Pub lic a tio n 447498 D02 F

• r Do ng le s with a sing le e xte rna l Swive l a nte nna the

fo llo wing g uida nc e sho uld b e a pplie d:

– T e st the Ho rizo nta l Up a nd Ho rizo nta l Do wn po sitio ns o f the d o ng le with the a nte nna c o nne c te d in stra ig ht mo d e a t a 5mm d ista nc e to the SAR pha nto m. – T he te sting o f the a nte nna tip is no t ne c e ssa ry. – If the two me a sure d SAR le ve ls a re simila r, the n a d d itio na lly te st the Ho rizo nta l Up po sitio n with the a nte nna c o nne c te d a t 90 d e g re e s, pe rpe nd ic ula r to the pha nto m (a nte nna po inting d o wn a nd a wa y fro m the pha nto m). – A 5mm se pa ra tio n d ista nc e to the pha nto m wo uld a g a in a pply. With the se 3 te st po sitio ns, SAR te sting c o nd itio ns fo r this d o ng le will b e sa tisfie d unle ss the fo llo wing o c c urs: – If the SAR le ve ls fo r the Ho rizo nta l Up a nd Ho rizo nta l Do wn po sitio ns

• f the d o ng le in a nte nna stra ig ht mo d e a re no t simila r, the n the

d ipo le a nte nna is no t symme tric a l a nd the Ve rtic a l F ro nt a nd Ve rtic a l Ba c k po sitio ns in a nte nna stra ig ht mo d e a lso ne e d to b e te ste d a t a 5mm d ista nc e to the SAR pha nto m.

I f the do ng le ha s multiple , inde pe nde nt swive l a nte nna s, the g uida nc e a b o ve sho uld b e a pplie d to e a c h a nte nna

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Hall E ffe c t and Gr avity Se nsor Guidanc e

F CC K DB Pub lic a tio n 616217 D04 pro vide s de ta ile d g uida nc e o n c a pa c itive pro ximity se nso rs No t muc h g uida nc e pro vide d fo r o the r type s o f se nso rs inc luding infra re d, mo tio n, o r g ra vity se nso rs in K DB pub lic a tio ns Ha ll E ffe c t a nd g ra vity se nso rs a re b e c o ming inc re a sing ly pre va le nt in la pto ps a nd ta b le ts, e spe c ia lly fo r c o nve rtib le la pto ps/ ta b le ts tha t switc h mo de s (la pto p , to sta nd mo de , to te nt mo de , to ta b le t mo de ) T he se se nso rs a re o fte n use d to trig g e r po we r re duc tio n b a se d o n the pa rtic ula r use mo de T his po we r re duc tio n o c c urs whe n the lid a ng le re a c he s a c e rta in va lue

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Hall E ffe c t and Gr avity Se nsor Guidanc e

T he fo llo wing g uid a nc e sho uld b e a pplie d to la pto ps/ ta b le ts tha t use Ha ll E ffe c t o r g ra vity se nso rs to de te c t lid a ng le fo r the purpo se o f po we r re duc tio n

– With the lid is in c lo se d mo de (0 de g re e s), o pe n the sc re e n in 10 de g re e ste ps until la pto p mo de is o b ta ine d – L

• we r the sc re e n 5 de g re e s. Clo se d mo de sho uld b e re o b ta ine d. I

f no t ke e p lo we ring in 5 de g re e ste ps. – Ope n the sc re e n in 1 de g re e ste ps until la pto p mo de is re o b ta ine d – Co ntinue o pe ning the sc re e n in 1 de g re e ste ps until a t le a st 5 de g re e s pa st whe re la pto p mo de wa s o b ta ine d – T he n c o ntinue o pe ning the sc re e n in 10 de g re e ste ps until ta b le t mo de is o b ta ine d – Po we r me a sure me nts sho uld b e ta ke n a t e a c h ste p – Re ve rse this pro c e dure g o ing fro m ta b le t mo de b a c k do wn to c lo se d mo de

De pe nding o n trig g e ring me c ha nism the de g re e ste ps ma y ne e d to b e va rie d to c o nfirm me c ha nism o pe ra tio n Ha ll E ffe c t a nd G -Se nso rs will still re q uire a PAG

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Por table WPT Applic ations

Se e ing a n inc re a se d numb e r o f no n- mo b ile WPT a pplic a tio ns Prima rily sma ll size , in-ve hic le a pplic a tio ns insta lle d in a rmre st, c e nte r c o nso le , o r a tta c he d to a ir c o nditio ning ve nt

– I nsta lla tio n c o nditio ns c a n ha ve a sig nific a nt impa c t o n po te ntia l RF E xpo sure

T ypic a lly simila r in size , sha pe , po we r (< 15 W) a nd func tio n to de skto p WPT de vic e s

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Por table WPT Applic ations

Due to lo w tra nsmissio n fre q ue nc y SAR me a sure me nt no t a pplic a b le Me a sure me nts diffic ult due to va rying pro b e size s, sha pe s a nd pro b e pe rturb a tio n o f me a sure me nt a t sho rt me a sure me nt dista nc e s Nume ric a l mo de ling a nd/ o r simula tio n is a via b le o ptio n b ut c a n b e b urde nso me a nd time -c o nsuming – Va rying insta lla tio n c o nditio ns ma ke nume ric a l mo de ling e xtre me ly c o mple x L

• w po we r (<15 W) ma ke po te ntia l fo r RF

E xpo sure lo w

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Por table WPT Applic ations

F

• r po rta b le de vic e s tha t do no t physic a lly

a tta c h to pho ne , de skto p WPT te sting g uida nc e fro m F CC K DB 680106 D01 (se e Oc to b e r 2018 T CB Wo rksho p slide s) F

• r lo w-po we r (<15W), in-ve hic le a pplic a tio ns

pe rfo rm H-fie ld me a sure me nts fo r e a c h e dg e / to p surfa c e o f the ho st/ c lie nt pa ir a t e ve ry 2 c m, sta rting fro m a s c lo se a s po ssib le

• ut to 10 c m

– Ma y no t b e po ssib le if pro b e ha s ve ry la rg e me a sure me nt he a d

I f me a sure me nts a re < 10% re spe c tive limit, no a dditio na l te sting is ne c e ssa ry. I f no t, sub mit a K DB I nq uiry Pre limina ry g uida nc e , sub je c t to c ha ng e

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mmWave Sc an Re quir e me nts

I nitia l mmWa ve me a sure me nt g uida nc e g ive n a t April 2019 T CB Wo rksho p Guida nc e a llo we d fo r te st re duc tio n b a se d o n se ve ra l fa c to rs inc luding ma ximum me a sure d PD, mo dula tio n, b a ndwidth, e tc . T ime -Ave ra g e d PD ma y a llo w fo r e ve n mo re sig nific a nt te st re duc tio n b e yo nd April 2019 T CB wo rksho p g uida nc e

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mmWave Sc an Re quir e me nts

mmWa ve me a sure me nts still ta ke a sig nific a nt a mo unt o f time April 2019 T CB wo rksho p slide s me ntio ne d fie lds a t the me a sure me nt re g io n b o unda ry sho uld b e ~20-30 dB b e lo w the pe a ks F urthe r studie s ha ve re ve a le d this ma y b e

• ve rly c o nse rva tive , inc re a sing the

re q uire d sc a n size a nd te st time Sma lle r a re a sc a n size s, with lo we r fie ld diffe re nc e b e twe e n the b o unda ry a nd pe a k will b e c o nside re d o n a c a se -b y- c a se b a sis

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Que stions? T hank You!

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