IEC 61114-1:1999 pdf download

IEC 61114-1:1999 pdf download

IEC 61114-1:1999 pdf download.Receiving antennas for satellite broadcast transmissions in the 11/12 GHz band – Part 1: Electrical measurement
1 Scope
This part of IEC 61 1 1 4 applies to individual and collective receiving antennas for satellite
broadcast transmissions in the 1 1 /1 2 GHz band.
This standard mainly applies to paraboloidal reflector antennas, which include offset
paraboloidal reflector antennas, Cassegrain reflector antennas and other equivalent types. It
also applies to planar array antennas. However, the supporting mast and the radome are not
included in this standard.
This standard applies to the following six types of antennas.
a) Antenna of a single antenna system to receive signals from a single satellite
1 ) linearly polarized single-beam antenna;
2) circularly polarized single-beam antenna.
b) Antenna of a single antenna system to receive signals from two or more than two satellites
1 ) linearly polarized multiple beam antenna;
2) circularly polarized multiple beam antenna.
c) Antenna of a multiple antenna system to receive signals from two or more than two satellites
1 ) linearly polarized system of single-beam antenna;
2) circularly polarized system of single-beam antenna.
Typical configurations of these six types are illustrated in figure 1 .
The object of this part of IEC 61 1 1 4 is to define the conditions and methods of measurement to
be applied. This standard does not specify performance requirements.
It is assumed that for some measurements the SHF converter will be removed from the
antenna, leaving access to an r.f. port.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 61 1 14. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and the parties to agreement based on this part of IEC 61 1 1 4 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of ISO and IEC maintain registers of currently valid International Standards.
IEC 60050(712):1 992, International Electrotechnical Vocabulary (IEV) – Chapter 71 2: Antennas
IEC 61 079-1 :1 992, Methods of measurement on receivers for satellite broadcast transmissions
in the 1 2 GHz band – Part 1 : Radio-frequency measurements on outdoor units
3 Terms and definitions
For the purpose of this part of IEC 61 1 1 4, the following general definitions apply.
3.1 receiving antenna
SHF antenna intended for use in individual and collective reception of satellite broadcast signals
A polarization switching device is included in an antenna, if the antenna is able to receive two orthogonal polarized waves.
3.2 paraboloidal reflector antenna
antenna usually comprising main reflector, a primary (and sometimes a secondary) radiator
with or without a feedome, an SHF converter, supporting structures for a primary radiator or
subreflector and pointing structures
3.3 planar array antenna
antenna usually comprising radiating elements, a feed network, an SHF converter, supporting
structures, pointing structures and a radome
3.4 standard antenna
antenna which is used as a gain reference for receiving antennas under test
3.5 source antenna
antenna which is used as a transmitting antenna for measurements
3.6 polarization switcher
device which can select one type of polarization
4 General notes on measurements
4.1 General conditions
4.1.1 Introduction
Measurements should be carried out in accordance with the following conditions to ensure
repeatable results.
4.1.2 Testing site
Measurements shall be carried out at a facility where external radio interference and reflections
from the ground and from surrounding structures have been minimized and their residual
effects have been measured.
The testing site for G/T measurement is provided in 4.3.3.
4.1.3 Power supply
If an SHF converter is used as an integral part of the antenna, a power supply equivalent to the
rated voltage of the converter shall be used. The fluctuation of the power supply voltage during
tests shall not exceed ±2 %.
4.1.4 Accuracy of measuring instruments
Requirements for the accuracy of measurements are not included in this part of IEC 61 1 1 4,
because they depend only on the purpose for which the measurements are required. The
accuracy of the measuring instruments used, if known, shall either be stated as a percentage
or in decibels, as appropriate. Alternatively, the precision class may be quoted as stated in
relevant publications (under consideration).

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