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Leakage feeder device

A cable device and leakage technology, applied in the field of leaky feeders, can solve the problems of radiation power attenuation, low radiation efficiency and the like

Active Publication Date: 2016-10-26
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

close to conductive objects such as Figure 4 Improper orientation of the cables (shown by the upper black square) may result in lower radiation efficiency because the slot is essentially covered by conductive objects
Similarly, close to lossy objects such as Figure 4 Improper orientation of the cables to the wall shown below) may result in more attenuation of the radiated power

Method used

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Embodiment Construction

[0028] In the figures, the same reference numerals are used to denote similar or corresponding elements.

[0029] It is an object of the present disclosure to improve the radiation efficiency and characteristics of leaky cables by ensuring that the slots of the cables are optimally aligned with the desired coverage area when installing the leaky cables into service areas. The above objects are achieved by a novel cable design in which the radiation slots can be created or activated and deactivated after cable manufacture or possibly after installation.

[0030] The basic idea of ​​the present disclosure is a novel leaky cable design comprising a large number of activated or inactive radiating slots. After installation (for example in a building), the radiating slots are activated or deactivated at desired locations along the cable by simple operations as described in the embodiments. Cables can therefore be installed with less regard for wireless coverage requirements; instea...

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Abstract

A leakage feeder device comprises a coaxial cable (10); a plurality of radiation slots (11) arranged on the coaxial cable; and an activation device (12) configured on a preset area of the cable so as to selectively activate or to activate at least one of the plurality of radiation slots (11). A leakage coaxial cable device (1) is provided.

Description

[0001] This application is a divisional application of the Chinese patent application No. 201280071992.6 filed on April 2, 2012, with the title of invention "Leaky Feeder Device". technical field [0002] The present disclosure relates generally to leaky feeders, and more particularly to adjustable leaky feeders and providing such feeders. Background technique [0003] Leaky cables (eg, radiating cables, leaky feeders) are used in cellular systems to provide improved coverage, especially in tunnels or along railway lines, and in indoor deployment situations. The leaky cable acts as a very long antenna and can help to achieve a more even coverage level than a single (small) antenna whose radiated power drops off rapidly with distance, figure 1 The two were compared. The system has limited range, and due to its use of high frequencies, the transmission cannot penetrate solid rock, which generally limits the system to line-of-sight applications. [0004] Leaky feeders are typ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/00H01Q13/20
CPCH01Q1/007H01Q13/203
Inventor 亨瑞克·阿斯普朗德简-埃瑞克·博格乔纳斯·麦德宝
Owner TELEFON AB LM ERICSSON (PUBL)