SIST EN IEC 55016-1-4:2019/A1:2020

SLOVENSKI STANDARD
SIST EN IEC 55016-1-4:2019/A1:2020
01-november-2020
Specifikacija merilnih naprav in metod za merjenje radiofrekvenčnih motenj in
odpornosti - 1-4. del: Merilne naprave za merjenje radiofrekvenčnih motenj in
odpornosti - Antene in preskuševališča za meritve sevanih motenj - Dopolnilo A1
Specification for radio disturbance and immunity measuring apparatus and methods -
Part 1-4: Radio disturbance and immunity measuring apparatus - Antennas and test sites
for radiated disturbance measurements
Anforderungen an Geräte und Einrichtungen sowie Festlegung der Verfahren zur
Messung der hochfrequenten Störaussendung (Funkstörungen) und Störfestigkeit – Teil
1-4: Geräte und Einrichtungen zur Messung der hochfrequenten Störaussendung
(Funkstörungen) und Störfestigkeit – Antennen und Messplätze für Messungen der
gestrahlten Störaussendung
Spécifications des méthodes et des appareils de mesure des perturbations
radioélectriques et de l'immunité aux perturbations radioélectriques - Partie 1-4:
Appareils de mesure des perturbations radioélectriques et de l'immunité aux
perturbations radioélectriques - Antennes et emplacements d'essai pour les mesures
des perturbations rayonnées
Ta slovenski standard je istoveten z: EN IEC 55016-1-4:2019/A1:2020
ICS:
17.240 Merjenje sevanja Radiation measurements
33.100.20 Imunost Immunity
SIST EN IEC 55016-1-4:2019/A1:2020 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 55016-1-4:2019/A1:2020

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SIST EN IEC 55016-1-4:2019/A1:2020


EUROPEAN STANDARD EN IEC 55016-1-4:2019/A1

NORME EUROPÉENNE

EUROPÄISCHE NORM
August 2020
ICS 33.100.10; 33.100.20

English Version
Specification for radio disturbance and immunity measuring
apparatus and methods - Part 1-4: Radio disturbance and
immunity measuring apparatus - Antennas and test sites for
radiated disturbance measurements
(CISPR 16-1-4:2019/A1:2020)
Spécifications des méthodes et des appareils de mesure Anforderungen an Geräte und Einrichtungen sowie
des perturbations radioélectriques et de l'immunité aux Festlegung der Verfahren zur Messung der hochfrequenten
perturbations radioélectriques - Partie 1-4: Appareils de Störaussendung (Funkstörungen) und Störfestigkeit - Teil 1-
mesure des perturbations radioélectriques et de l'immunité 4: Geräte und Einrichtungen zur Messung der
aux perturbations radioélectriques - Antennes et hochfrequenten Störaussendung (Funkstörungen) und
emplacements d'essai pour les mesures des perturbations Störfestigkeit - Antennen und Messplätze für Messungen
rayonnées der gestrahlten Störaussendung
(CISPR 16-1-4:2019/A1:2020) (CISPR 16-1-4:2019/A1:2020)
This amendment A1 modifies the European Standard EN IEC 55016-1-4:2019; it was approved by CENELEC on 2020-07-20. CENELEC
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment the
status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation under the
responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as
the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.


European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN IEC 55016-1-4:2019/A1:2020 E

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SIST EN IEC 55016-1-4:2019/A1:2020
EN IEC 55016-1-4:2019/A1:2020 (E)
European foreword
The text of document CIS/A/1316/FDIS, future CISPR 16-1-4/A1, prepared by CISPR SC A "Radio-
interference measurements and statistical methods" of CISPR "International special committee on
radio interference" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
EN IEC 55016-1-4:2019/A1:2020.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2021-04-20
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2023-07-20
document have to be withdrawn

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard CISPR 16-1-4:2019/A1:2020 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
CISPR 11 NOTE Harmonized as EN 55011


2

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SIST EN IEC 55016-1-4:2019/A1:2020




CISPR 16-1-4

®


Edition 4.0 2020-06




INTERNATIONAL



STANDARD




NORME


INTERNATIONALE
colour

inside



INT ERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE

C OMITÉ INTERNATIONAL SPÉCIAL DES PERTURBATIONS RADIOÉLECTRIQUES



AMENDMENT 1

AMENDEMENT 1



Specification for radio disturbance and immunity measuring apparatus

and methods –

Part 1-4: Radio disturbance and immunity measuring apparatus – Antennas


and test sites for radiated disturbance measurements


Spécifications des méthodes et des appareils de mesure des perturbations

radioélectriques et de l'immunité aux perturbations radioélectriques –

Partie 1-4: Appareils de mesure des perturbations radioélectriques et de

l'immunité aux perturbations radioélectriques – Antennes et emplacements

d'essai pour les mesures des perturbations rayonnées







INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 33.100.10; 33.100.20 ISBN 978-2-8322-8450-6




Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN IEC 55016-1-4:2019/A1:2020
– 2 – CISPR 16-1-4:2019/AMD1:2020
© IEC 2020
FOREWORD
This amendment has been prepared by subcommittee CISPR A: Radio-interference
measurements and statistical methods, of IEC technical committee CISPR: International special
committee on radio interference.
The text of this amendment is based on the following documents:
FDIS Report on voting
CIS/A/1316/FDIS CIS/A/1320/RVD

Full information on the voting for the approval of this amendment can be found in the report on
voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the stability date indicated on the IEC website under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.

_____________

3.2 Abbreviated terms
Add the following new abbreviated terms to the existing list:
DRH double ridged horn
XP cross polarization
PDF probability density function

4.5.5 Cross-polar response of antenna
Delete, in the first sentence of the existing last paragraph, the cross-reference to [21].

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4.7 Special antenna arrangements – large-loop antenna system
Replace the first sentence of the third paragraph with the following new sentence:
The EUT shall be positioned in the centre of the LLAS on a non-conductive support table.

Replace the third sentence of the third paragraph with the following new sentence:
Guidelines for routing of EUT cables are given in C.3 and Figure C.6.

Add, after the existing third paragraph, the following new paragraph:
The LLAS may be placed in any environment. Placement inside a shielded room, SAC, FAR, or
weather-protected OATS is permitted. Placement in a shielded environment is recommended
to eliminate ambient signals allowing for better sensitivity to EUT emissions. A minimum
distance of 0,5 m between the LLAS and any metallic plane is recommended. The validation of
the LLAS shall be performed at the location where the LLAS measurements normally take place
to take into account the effect of the environment (see C.4).

Replace, in the NOTE, "Correction factors" with "Conversion factors".

C.3 Construction of a large-loop antenna (LLA)
Replace the existing third paragraph with the following paragraph:
The standard diameter of each LLA is defined as D = 2 m (i.e. the reference diameter). If
necessary, e.g. in the case of a large EUT, D may be increased. However, in the frequency
range up to 30 MHz, the maximum diameter allowed is 4 m. Further increase of the diameter
can result in non-reproducible resonances of the LLAS response at the high-frequency end of
the measuring range. The validation method specified in C.4 applies for LLAS loops with
diameters of 2 m, 3 m, or 4 m.

Replace the second sentence of the seventh paragraph "The insertion loss of the current probe
shall be sufficiently low (see NOTE 1)." with "The insertion impedance of the current probe
should be sufficiently low (see NOTE)."
Delete the existing NOTE 1 and NOTE 2.

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Add, between the seventh and eighth paragraphs, the following new NOTE:
NOTE To obtain a flat frequency response for each LLA at the lower end of the 9 kHz to 30 MHz frequency range,
the resistive part of the insertion impedance, R , of the current probe is designed to be much smaller than 2π f L at
c c
f = 9 kHz, where L represents the inductance of the current probe. In addition, R + R is to be less than or equal to
c c i
X /10 = (2π f L)/10 at 9 kHz, where R is the resistance of the inner conductor of the loop and L is the loop inductance.
i i
This inductance is about 1,5 µH/m along the circumference; thus, for each standard LLA whose diameter is 2 m,
X ≈ 0,5 Ω at f = 9 kHz.
i

Add, at the end of the existing text (before Figure C.1), the following new paragraph:
To avoid unwanted capacitive coupling between the EUT and the LLAS, the distance between
the EUT and components of the LLAS shall be at least 0,10 times the loop diameter. Particular
attention should be paid to the leads of an EUT. Cables shall be routed together and leave the
test volume in the same octant of the LLAS, no closer than 0,4 m to any of the LLAS loops (see
Figure C.6).

C.4 Validation of an LLA
Replace the existing title of this clause with the following new title:
C.4 Validation of the LLAS
Replace the first paragraph of this clause with the following three new paragraphs:
The validation of the LLAS shall be carried out by measuring the current induced in each of the
three LLAs by means of the LLAS verification dipole connected to a 50 Ω RF generator, as
described in C.5. The magnetic field emitted by the dipole allows verification of the magnetic
field sensitivity of the LLAS. The electric field emitted by the LLAS verification dipole is intended
to verify that the electric field sensitivity of the LLAS is sufficiently low.
The validation of an LLAS shall be performed at the site where the LLAS measurements
normally take place. This is to account for the effect of the floor, walls, and similar objects or
surfaces in the specific environment of the LLAS.
Validation measurements shall be performed at least at the following frequencies: 9 kHz,
100 kHz, 1 MHz, 2 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz, 20 MHz, 25 MHz, and 30 MHz.

Replace the existing second and third paragraphs with the following new paragraphs:
The induced current shall be measured as a function of frequency in the range of 9 kHz to
30 MHz at the eight positions of the LLAS verification dipole shown in Figure C.7. During this
measurement, the LLAS verification dipole shall be in the plane of the LLA under test.
In each of the eight positions, the measured validation factor, expressed in dB(Ω) as
20 lg(V /I ), where V is the open circuit voltage of the RF generator and I is the measured
go I go I
current, shall not deviate by more than ±3 dB from the applicable reference validation factor
given in Figure C.8 and Table C.1.

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© IEC 2020
Delete the existing fourth paragraph.

Add, before Figure C.7, three new paragraphs as follows:
The reference validation factors given in Figure C.8 and Table C.1 are valid for an LLAS with
circular loops having diameters of D = 2 m, 3 m, or 4 m.
Tabular values of the curves presented in Figure C.8 are given in Table C.1. These tabular
values shall be used for the LLAS validation.
Background material and the equations for calculating the reference validation factors are given
in CISPR TR 16-3:2020 [23].

Figure C.7 – The eight positions of the LLAS verification dipole during validation of an
LLA
Replace the existing figure with the following new figure:

Figure C.7 – The eight positions of the LLAS verification
dipole during validation of an LLA

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© IEC 2020
Figure C.8 – Validation factor for an LLA of 2 m diameter
Replace the existing figure, including its title, with the following new figure:

Figure C.8 – Reference validation factors for loops
of 2 m, 3 m, and 4 m diameters

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© IEC 2020
Add, after the new Figure C.8, the following new table:
Table C.1 – Reference validation factors of Figure C.8 for
loops of 2 m, 3 m, and 4 m diameters
Reference validation factor Reference validation factor
Frequency Frequency
2 m LLAS 3 m LLAS 4 m LLAS 2 m LLAS 3 m LLAS 4 m LLAS
MHz dB(Ω) MHz dB(Ω)
0,009 72,52 81,07 86,64 7 79,57 87,87 93,13
0,01 72,52 81,07 86,64 8 80,47 88,71 93,88
0,02 72,52 81,07 86,64 9 81,30 89,45 94,54
0,03 72,52 81,07 86,64 10 82,04 90,12 95,11
0,04 72,52 81,07 86,64 11 82,72 90,71 95,62
0,05 72,52 81,07 86,64 12 83,34 91,24 96,07
0,06 72,52 81,07 86,65 13 83,90 91,72 96,47
0,07 72,52 81,07 86,65 14 84,42 92,15 96,84
0,08 72,52 81,07 86,65 15 84,90 92,54 97,18
0,09 72,52 81,07 86,65 16 85,34 92,89 97,50
0,1 72,52 81,07 86,65 17 85,75 93,22 97,80
0,2 72,54 81,08 86,66 18 86,13 93,53 98,10
0,3 72,55 81,10 86,68 19 86,48 93,82 98,39
0,4 72,58 81,13 86,70 20 86,81 94,09 98,67
0,5 72,61 81,16 86,73 21 87,12 94,35 98,94
0,6 72,65 81,20 86,77 22 87,41 94,60 99,21
0,7 72,70 81,24 86,82 23 87,68 94,85 99,47
0,8 72,75 81,30 86,87 24 87,94 95,09 99,72
0,9 72,81 81,36 86,93 25 88,19 95,32 99,96
1 72,88 81,42 86,99 26 88,43 95,56 100,18
2 73,81 82,33 87,88 27 88,66 95,79 100,38
3 75,01 83,51 89,02 28 88,88 96,02 100,57
4 76,26 84,72 90,19 29 89,09 96,25 100,73
5 77,46 85,88 91,28 30 89,30 96,47 100,88
6 78,56 86,93 92,26 - - - -

C.5 Construction of the LLAS verification dipole antenna
Replace the first paragraph with the following paragraph:
The LLAS verification dipole, shown in Figure C.9, has been designed to emit simultaneously a
magnetic field, which should be measured by the LLAS, and an electric field, which should be
rejected by the LLAS.

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© IEC 2020
Replace the existing second and third paragraphs with the following two paragraphs:
The LLAS verification dipole antenna shall be constructed in accordance with Figure C.9, using
RG-223/U or similar type of coaxial cable. It shall have a width W = 150 cm and a spacing
s = 10 cm (cable centre to cable centre distances), as depicted in Figure C.9. A slit in the outer
conductor of the coaxial cable shall separate the dipole into two halves. One half of the dipole
(the right-hand half in Figure C.9) shall be short-circuited near the connector as well as near
the slit opposite from the connector. Short-circuited means that the inner and outer conductors
of the coaxial cable shall be electrically bonded together. This half shall be connected to the
reference-ground of the coaxial connector (BNC or similar type). The inner conductor of the
coaxial cable, forming the left-hand half of the dipole in Figure C.9, shall be connected to the
centre-pin of the coaxial connector, and its outer conductor connected to the reference ground
of that coaxial connector.
A small metal box shall be used to screen the connections near the coaxial connector. The
outer conductor of the two halves of the dipole coaxial cable and the reference ground of the
coaxial connector shall be bonded to this box.

Replace, in the existing fourth paragraph, "is used" with "may be used".

Figure C.9 – Construction of the LLAS verification dipole antenna
Replace the existing figure with the following new figure, without modifying its title:
Dimensions in millimetres

NOTE Distances indicated are cable centre to cable centre distances.

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© IEC 2020
C.6 Conversion factors
Replace the existing text this clause, including Figure C.10 and Figure C.11, by the following
new Clauses C.6 and C.7.
C.6 Conversion factors
C.6.1 General
This subclause deals with the factor that converts the current measured in an LLA with a non-
standard diameter to a current that would have been measured using an LLA with the standard
diameter of D = 2 m (see Figure C.10 and Table C.2). It also deals with the factor that converts
the current (I) induced in an LLA by an EUT into a magnetic field strength H at a specified
distance from the EUT (see Figure C.11 and Table C.3). Background material and the equations
for calculating these conversion factors are given in CISPR TR 16-3:2020 [23].
C.6.2 Current conversion factors for an LLAS with non-standard diameter
The difference S in decibels, between the current measured in an LLA with diameter D, in m,
D
and the current that would be measured using an LLA having the standard diameter D = 2 m,
expressed in logarithmic units (such as dB(µA)), is given in Figure C.10 (and Table C.2) for
several values of D, as determined using Equation (C.1):

S = I − I

(C.1)
D D m 2 m
where I and I are the values of the induced currents in an LLA with diameter D and the
D m 2 m
standard 2 m diameter LLA, respectively, both expressed in logarithmic units (such as dB(µA)).

Figure C.10 – Sensitivity S of an LLA with diameter D
D
relative to an LLA with 2 m diameter

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Table C.2 – Sensitivity S of an LLA with diameter D
D
relative to an LLA with 2 m diameter (Figure C.10)
LLAS diameter D LLAS diameter D
Frequency Frequency
1 m 1,5 m 3 m 4 m 1 m 1,5 m 3 m 4 m
MHz MHz
dB dB dB dB dB dB dB dB
0,009 12,88 5,34 -7,50 -12,80 7 12,72 5,24 -7,25 -12,24
0,01 12,88 5,34 -7,50 -12,80 8 12,67 5,22 -7,18 -12,08
0,02 12,88 5,34 -7,50 -12,80 9 12,62 5,19 -7,11 -11,92
0,03 12,88 5,34 -7,50 -12,80 10 12,56 5,16 -7,02 -11,75
0,04 12,88 5,34 -7,50 -12,80 11 12,50 5,12 -6,94 -11,58
0,05 12,88 5,34 -7,50 -12,80 12 12,43 5,08 -6,85 -11,41
0,06 12,88 5,34 -7,50 -12,80 13 12,36 5,04 -6,76 -11,25
0,07 12,88 5,34 -7,50 -12,80 14 12,29 5,00 -6,67 -11,09
0,08 12,88 5,34 -7,50 -12,80 15 12,21 4,96 -6,58 -10,96
0,09 12,88 5,34 -7,50 -12,80 16 12,12 4,91 -6,50 -10,84
0,1 12,88 5,34 -7,50 -12,80 17 12,04 4,87 -6,42 -10,73
0,2 12,88 5,33 -7,50 -12,80 18 11,95 4,82 -6,35 -10,65
0,3 12,88 5,33 -7,50 -12,80 19 11,86 4,77 -6,28 -10,58
0,4 12,88 5,33 -7,50 -12,80 20 11,77 4,73 -6,23 -10,53
0,5 12,88 5,33 -7,50 -12,80 21 11,68 4,68 -6,18 -10,50
0,6 12,88 5,33 -7,50 -12,80 22 11,60 4,64 -6,14 -10,48
0,7 12,88 5,33 -7,50 -12,80 23 11,51 4,60 -6,11 -10,46
0,8 12,88 5,33 -7,49 -12,80 24 11,42 4,55 -6,09 -10,45
0,9 12,88 5,33 -7,49 -12,79 25 11,33 4,52 -6,08 -10,44
1 12,87 5,33 -7,49 -12,79 26 11,25 4,48 -6,08 -10,43
2 12,86 5,33 -7,48 -12,75 27 11,17 4,45 -6,08 -10,40
3 12,85 5,32 -7,45 -12,69 28 11,09 4,41 -6,09 -10,37
4 12,83 5,30 -7,41 -12,61 29 11,02 4,39 -6,10 -10,32
5 12,80 5,29 -7,37 -12,50 30 10,95 4,36 -6,12 -10,25
6 12,76 5,27 -7,31 -12,38 - - - - -

C.6.3 Conversion of LLAS measured current to magnetic field strength
The conversion factor in Figure C.11 and Table C.3 represent the worst-case (highest) of all
three polarizations when considering a source of magnetic field positioned in the centre of an
LLA with its magnetic dipole moment perpendicular to the plane of that LLA, for all three loops
of an LLAS. As such, this conversion factor may be used to estimate the worst-case magnetic
field strength that would be measured with the loop antenna specified in 4.3, at a specific
measurement distance (3 m, 10 m, or 30 m) from the EUT periphery, with the loop antenna
centre at 1,3 m above the metallic ground plane of a test site, with the EUT’s lowest surface
positioned at 80 cm above the ground plane, and with the EUT rotated through all azimuth
angles, for all three loop antenna polarizations. This field strength estimation may be obtained
by adding the conversion factor of Figure C.11 and Table C.3 to the worst-case induced current
level measured from the EUT with the three loops of the LLAS, at the frequency of
measurement.
NOTE 1 Often, traditional magnetic field strength test methods (e.g. from CISPR 11 [24]) apply a loop antenna as
specified in 4.3 and positioned in a vertical plane only while the EUT is rotated only around its vertical axis. In that
case only the horizontal dipole moments, i.e. the dipole moments parallel to the ground plane, are measured.
Consequently, in case the EUT also generates vertical dipole moments, the LLAS conversion factor cannot be used
to compare the results of both measurement methods. However, the LLAS conversion factor can be used for
comparisons with the magnetic field strength measurement method results when the loop antenna of 4.3 is positioned
in a horizontal plane, in addition to the two vertical loop plane polarizations.

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If the actual position of a disturbance source within an EUT is at a distance less than 0,5 m
from the centre of the standard LLAS, the measurement results differ by less than 3 dB from
those with that source in the centre of the LLAS.
The relation between the magnetic field strength H in dB(µA/m) measured at a distance d and
the LLA current I in dB(µA) is per Equation (C.2):

H= I+ C (C.2)
dA
-1
where C is the current-to-field conversion factor in dB(m ) for a certain distance d when
dA
expressing H in dB(µA/m) (see also NOTE 2).
In general, the conversion factor is frequency-dependent; Figure C.11 (and Table C.3) present
C for standard measurement distances of 3 m, 10 m, and 30 m.
dA
If the current is measured in an LLAS with a non-standard diameter D, Equation (C.2) can be
written as Equation (C.3):
(C.3)
H= I− S + C
D dA

–1
where H is expressed in dB(µA/m), I in dB(µA), S in dB, and C in dB(m ).
D dA
NOTE 2 For disturbance level calculations, CISPR uses the magnetic field strength H in dB(µA/m) instead of electric
field strength E in dB(µV/m). In this context, the relation between H and E is given by Equation (C.4):

E= H+ 51,5 (C.4)
where E is expressed in dB(µV/m) and H in dB(µA/m). The constant 51,5, in dB(Ω) in Equation (C.4), is explained in
the NOTE in 4.3.2.

Figure C.11 – Conversion factor C [for conversion into dB(μA/m)]
dA
for three standard measurement distances d

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Table C.3 – Magnetic field strength conversion factor C
dA
for three measurement distances (Figure C.11)
2 m LLAS to 2 m LLAS to 2 m LLAS to 2 m LLAS to 2 m LLAS to 2 m LLAS to
Frequency
Frequency
3 m field 10 m field 30 m field 3 m field 10 m field 30 m field
MHz
dB(1/m) dB(1/m) dB(1/m) (MHz) dB(1/m) dB(1/m) dB(1/m)
0,009 -19,77 -47,18 -75,09 7 -18,97 -42,23 -55,72
0,01 -19,77 -47,18 -75,09 8 -18,76 -41,45 -53,41
0,02 -19,77 -47,18 -75,09 9 -18,56 -40,74 -51,4
0,03 -19,77 -47,18 -75,09 10 -18,35 -40,08 -49,63
0,04 -19,77 -47,18 -75,09 11 -18,14 -39,24 -48,04
0,05 -19,77 -47,18 -75,08 12 -17,93 -37,72 -46,61
0,06 -19,77 -47,18 -75,08 13 -17,73 -36,36 -45,31
0,07 -19,77 -47,18 -75,08 14 -17,54 -35,11 -44,12
0,08 -19,77 -47,18 -75,08 15 -17,35 -33,97 -43,03
0,09 -19,77 -47,18 -75,08 16 -17,18 -32,92 -42,02
0,1 -19,77 -47,18 -75,07 17 -17,02 -31,95 -41,08
0,2 -19,77 -47,17 -75,02 18 -16,87 -31,05 -40,21
0,3 -19,77 -47,16 -74,94 19 -16,73 -30,22 -39,40
0,4 -19,77 -47,15 -74,82 20 -16,60 -29,44 -38,63
0,5 -19,76 -47,13 -74,68 21 -16,48 -28,71 -37,92
0,6 -19,76 -47,11 -74,51 22 -16,37 -28,02 -37,25
0,7 -19,76 -47,09 -74,32 23 -16,27 -27,37 -36,61
0,8 -19,76 -47,06 -74,11 24 -16,18 -26,76 -36,01
0,9 -19,75 -47,02 -73,88 25 -16,10 -26,18 -35,43
1 -19,75 -46,99 -73,64 26 -16,03 -25,62 -34,89
2 -19,69 -46,46 -70,97 27 -15,96 -25,10 -34,37
3 -19,60 -45,70 -68,52 28 -15,90 -24,59 -33,87
4 -19,48 -44,83 -65,70 29 -15,52 -24,11 -33,39
5 -19,33 -43,93 -61,65 30 -15,04 -23,64 -32,93
6 -19,15 -43,06 -58,41 - - - -

C.7 Examples
The following examples explain use of Equation (C.1), Equation (C.2), Equation (C.3),
Figure C.8, Figure C.10, and Figure C.11.
a) Given: measuring frequency f = 100 kHz, LLA diameter D = 2 m, current in LLA I = X dB(µA).
Then using Equation (C.1) and Figure C.10, it follows that:
–1
at d = 3 m: H = [X/dB(µA) + C /dB(m )] dB(µA/m) = (X − 19,5) dB(µA/m)
3A
at d = 3 m: E = [X/dB(µA) + C /dB(Ω/m)] dB(µV/m) = [X + (51,5 − 19,5)] dB(µV/m)
3V
b) Given: measuring frequency f = 100 kHz, LLA diameter D = 2 m, current in LLA I = X dB(µA).
Then, using Equation (C.2) and Figure C.11 (Table C.3), it follows that:
–1
at d = 3 m: H [dB(µA/m)] = X [dB(µA)] + C [dB(m )] = (X – 19,77) dB(µA/m)
3A
c) Given: measuring frequency f = 100 kHz, LLA diameter D = 4 m, current in LLA I = X dB(µA).
Then, using Equation (C.1) and Figure C.10 (Table C.2), it follows that the same EUT
would induce a current:
I [dB(µA)] = X [dB(µA)] – S [dB] = X – (–12,80) = (X + 12,80) dB(µA)
4
in an LLA with the standard diameter D = 2 m.

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SIST EN IEC 55016-1-4:2019/A1:2020
CISPR 16-1-4:2019/AMD1:2020 – 13 –
© IEC 2020

Add, after the existing Annex G, the following new Annex H:
Annex H
(informative)

Definition of uncertainty in cross-polar response measurement
H.1 General
Subclause 4.5.5 of this document describes the method of cross-polar response (XPR)
measurement for antennas with LPDA type design. This annex defines and discusses the
sources of uncertainty involved in the measurement and provides example uncertainty
estimates.
The uncertainty estimates in this annex are based on an LPDA (or hybrid) antenna that is placed
in a FAR, with elements oriented along the vertical axis (i.e. in VP), for frequencies above
100 MHz. It is anticipated that a FAR would be most suitable for this measurement; however,
the uncertainty analysis may be adapted for other facilities such as OATS or SAC. The
uncertainty estimate applies when using either a dipole antenna (below 1 GHz), or linearly-
polarized horn antenna (above 1 GHz) as the receive antenna (Rx antenna, denoted by ‘R’).
For best results, the frequency should be swept from 30 % to 150 % of the dipole’s tuned
frequency. The analysis uses linear ratio terms because the final uncertainty will always be
asymmetric for low cross-polar signals.
The AUT (transmit antenna, denoted by ‘T’) generates a primary (vertically polarized) field (E ),
x
and a secondary cross-polar (horizontally polarized) field (E ). Here E is the fie
...