BS-5640-1-1978 IEC-60597-1-1977.pdf
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1、BRITISH STANDARD BS 5640-1: 1978 IEC 597-1: 1977 Aerials for the reception of sound and television broadcasting in the frequency range 30 MHz to 1 GHz Part 1: Specification for electrical and mechanical characteristics UDC 621.396.67 Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 13:08:54 GM
2、T+00:00 2006, Uncontrolled Copy, (c) BSI BS 5640-1:1978 This British Standard, having been prepared under the direction of the Electronic Components Standards Committee, was published under the authority of the Executive Board on 30 November 1978 BSI 04-2000 The following BSI references relate to th
3、e work on this standard: Committee reference EEL/25 Draft for comment 75/28776 DC ISBN 0 580 10433 8 Cooperating organizations The Electronic Equipment Standards Committee, under whose direction this British Standard was prepared, consists of representatives from the following Government department
4、and scientific and industrial organizations: British Broadcasting Corporation* British Electrical and Allied Manufacturers Association (BEAMA) British Radio Equipment Manufacturers Association Cable and Wireless Limited Electrical, Electronic, Telecommunications Plumbing Union Electricity Supply Ind
5、ustry in England and Wales Electronic, Components Industry Federation* Electronic Engineering Association* Institution of Electronic and Radio Engineers* Ministry of Defence Post Office* Scientific Instrument Manufacturers Association The organizations marked with an asterisk in the above list, toge
6、ther with the following, were directly represented on the committee entrusted with the preparation of this British Standard Aerial Manufacturers Association British Aerial Standards Council Confederation of Aerial Industries Home Office Independent Broadcasting Authority Amendments issued since publ
7、ication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 13:08:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5640-1:1978 BSI 04-2000i Contents Page Cooperating organizationsInside front cover National forewordii 1Scope1 2Object1 3Terminology1 4Specification of
8、essential properties of receiving aerials2 5IEC type designation3 6Type tests3 7Approval tests3 Publication referred toInside front cover Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 13:08:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5640-1:1978 ii BSI 04-2000 National foreword This Br
9、itish Standard has been prepared under the direction of the Electronic Equipment Standards Committee. It is identical with Publication 597-1 “Aerials for the reception of sound and television broadcasting in the frequency range 30 MHz to 1 GHz” Part 1 “Electrical and mechanical characteristics”, pub
10、lished by the International Electrotechnical Commission (IEC). Terminology and conventions. The text of the International Standard has been approved as suitable for publication, without deviation, as a British Standard. Some terminology and certain conventions are not identical with those used in Br
11、itish Standards; attention is especially drawn to the following. Wherever the words “publication” and “standard” appear, referring to this standard they should be interpreted as “British Standard”. Reference. The reference to the “International Electrotechnical Vocabulary (I.E.V.)” (IEC 50) in claus
12、e 3, for which there is no corresponding British Standard, constitutes informative matter only, and since no mandatory requirements are involved, the validity of this British Standard is not affected. Additional information. In addition to the IEC designation requirements of clause 5, products compl
13、ying with the requirements of this specification should be identified also with the number of this British Standard. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a
14、British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 4, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendme
15、nts incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 13:08:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5640-1:1978 BSI 04-20001 1 Scope This standard covers linearly polarized receiving aerials, for dom
16、estic use, in the frequency range 30 MHz to 1 GHz. 2 Object This standard defines and specifies the essential electrical and mechanical properties of aerials for the reception of sound and television broadcasting. 3 Terminology Terminology is in accordance with the International Electrotechnical Voc
17、abulary (I.E.V.), with the following additional definitions which do not appear therein. 3.1 Receiving aerial That part of a radio receiving system which effects conversion between intercepted electromagnetic waves and guided radio frequency currents or fields in an associated transmission line. NOT
18、EThis definition will normally include any impedance matching devices, baluns and integral active equipment. It includes also those parts of the transmission line, supporting structure and other components which influence aerial performance by virtue of proximity, where they form part of the assembl
19、y as supplied or as required for the installation. These can be excluded from the specification if agreed between purchaser and manufacturer. 3.1.1 active receiving aerial an aerial which incorporates an active device as an integral part essential for its proper functioning 3.2 aerial gain the ratio
20、, in decibels, of the power delivered to the resistive load, specified as indicated in Sub-clause 4.1, when the aerial is optimally orientated in the uniform field of a plane linearly polarized electromagnetic wave, to the power available from a correctly terminated half-wave dipole optimally orient
21、ated in the same wave field NOTEThe gain of an aerial can also be expressed as the gain relative to an isotropic aerial. The gain of a half-wave dipole compared with an isotropic aerial is theoretically 2.15 dB. unless otherwise specified, the figure expressing the gain of an aerial refers to the ga
22、in in the direction of the main lobe. When the aerial has been designed to receive from a direction other than that of the main lobe, the direction for which the gain is given shall always be stated the type of reference aerial, and whether the gain is expressed as a numerical ratio or in decibels,
23、shall be clearly indicated 3.3 directivity protection the ratio, in decibels, of maximum forward gain to the maximum minor lobe gain 3.4 cross-polarization protection the ratio, in decibels, of the power received from a wave linearly polarized in the designed plane of polarization, to the power rece
24、ived from an orthogonally polarized wave of the same amplitude 3.5 beamwidth angular width of the major lobe in both E and H planes respectively, between points at which the gain is 3 dB below its maximum value 3.6 Bandwidth The extent of a continuous range of frequencies over which an aerial charac
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