共找到 208 条与 天线及其馈线 相关的标准,共 14 页
The methodology and guidelines introduced in § 2 have been used to model the radiation patterns for large antennas used in deep space research and radio astronomy. These methods are described in detail in Recommendation ITU-R SA.1345 – Methods for predicting radiation patterns of large antennas used for space research and radio astronomy. In predicting the radiation pattern of the NASA’s deep space network (DSN) antenna, the latest version of a commercially available software package (GRASP9) has been used. For the radiation pattern of the radio astronomy antenna, an old version (GRASPC) of the same software has been used. The results illustrate the effect of various parameters on the model's predictions and the significance of various mechanical and design features.
Examples of radiation patterns of large antennas used for space research and radio astronomy
Covers requirements for assembled insulated conductor bundles. Also covers bundles with or without a supporting core, an auxiliary core or an earth core, or any combination of these.
Aerial bundled conductor systems Part 2: Assembled insulated conductor bundles
Covers the requirements for cores consisting of stranded conductors that are insulated with cross-linked polyethylene (XLPE) and that are intended for use in aerial bundled conductor (ABC) systems for overhead single-phase and three-phase electricity dis
Aerial bundled conductor systems Part 1: Cores
This Report provides information on the determination of isolation for mobile radio antennas separated horizontally less than a few wavelengths in the 30 to 108 MHz bands. The study presents analytical and experimental isolation results for two antennas. The impact of isolation to the operation of radio systems and effect of the physical characteristics of the antenna platform are not studied.
Study of the isolation between VHF land mobile radio antennas in close proximity
Fixed Radio Systems; Characteristics and requirements for point-to-point equipment and antennas; Part 4-2: Antennas; Harmonized EN covering the essential requirements of article 3.2 of the R&TTE Directive V1.4.1
Fixed Radio Systems; Characteristics and requirements for point-to-point equipment and antennas; Part 4-1: System-dependent requirements for antennas V1.3.1
This standard defines test and measurement procedures for use by manufacturers of television receive antennas who wish to categorize their antennas in accordance with CEA-2028-A, Color Codes for Outdoor TV Receiving Antennas, for use with the CEA TV Antenna Selector Program www.AntennaWeb.org. Essential elements include procedures to determine antenna gain, front-to-back ratio, average gain to null ratio, directivity and distortion performance of active antennas with integrated amplifiers.
TV Receiving Antenna Performance Presentation and Measurement
This section defines: (i) the minimum acceptable analysis models and techniques, and (ii) the requirements to account for the dynamic effects of wind gusts.
Structural Standard for Antenna Supporting Structures
This standard defines test and measurement procedures for determining the performance of indoor TV receiving antennas.
Indoor TV Receiving Antenna Performance Standard
Steel radio towers and masts
Transmitting/receiving systems for transmitter RF output power up to 1 kW - Part 300: Safety requirements
Fixed Radio Systems - Multipoint Equipment and Antennas - Part 3: Harmonized EN covering the essential requirements of article 3.2 of the R&TTE Directive for Multipoint Radio Antennas (Endorsement of the English version EN 302326-3 V1.3.1 (2008-02) as Ger
Fixed Radio Systems; Multipoint Equipment and Antennas; Part 3: Harmonized EN covering the essential requirements of article 3.2 of the R&TTE Directive for Multipoint Radio Antennas (V1.3.1)
This European standard specifies requirements in the telecommunications sector.
Fixed Radio Systems - Multipoint Equipment and Antennas - Part 3: Harmonized EN covering the essential requirements of article 3.2 of the R&TTE Directive for Multipoint Radio Antennas (Endorsement of the English version EN 302326-3 V1.2.2 (2007-06) as Ger
This European standard specifies requirements in the telecommunications sector
Fixed Radio Systems - Multipoint Equipment and Antennas - Part 2: Harmonized EN covering the essential requirements of article 3.2 of the R&TTE Directive for Digital Multipoint Radio Equipment (Endorsement of the English version EN 302326-2 V1.2.2 (2007-0
This European standard specifies requirements in the telecommunications sector.
Fixed Radio Systems - Characteristics and requirements for point-to-point equipment and antennas - Part 1: Overview and system-independent common characteristics (Endorsement of the English version EN 302217-1 V1.2.1 (2007-06) as German standard)
Fixed Radio Systems - Multipoint Equipment and Antennas - Part 1: Overview and Requirements for Digital Multipoint Radio Systems (Endorsement of the English version EN 302326-1 V1.2.2 (2007-06) as German standard)
Fixed Radio Systems - Characteristics and requirements for point-to-point equipment and antennas - Part 2-1: System-dependent requirements for digital systems operating in frequency bands where frequency co-ordination is applied (Endorsement of the Englis
Fixed Radio Systems; Multipoint Equipment and Antennas; Part 3: Harmonized EN covering the essential requirements of article 3.2 of the R&TTE Directive for Multipoint Radio Antennas V1.2.2
This Report addresses technical and performance issues associated with the design of multiple-feed BSS receiving earth station antennas.
Multiple-feed BSS receiving antennas
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