Antenna apparatus of BGAN system portable terminal

A portable terminal and antenna device technology, applied in the directions of antennas, antenna arrays, radiating element structures, etc., can solve the problems of antenna directivity, easy generation of radiation nulls, increase in antenna cost, etc., achieve good matching, avoid radiation nulls, The effect of good main lobe directionality

Inactive Publication Date: 2008-01-23
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the use of microwave material substrates, the cost of the antenna is increased; due to the equal power feeding of each unit antenna, it is easy to generate radiation zero points, and the

Method used

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  • Antenna apparatus of BGAN system portable terminal
  • Antenna apparatus of BGAN system portable terminal
  • Antenna apparatus of BGAN system portable terminal

Examples

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Embodiment Construction

[0022] An antenna device for a BGAN system portable terminal as shown in Figures 1-6, in which the unit antenna body adopts a double-layer microstrip structure, the lower layer of the double-layer conductor patch is the excitation unit, and the upper layer conductor patch is the parasitic unit. Both the upper and lower layers of patches use squares as radiation units. This unit is simple, easy to manufacture, and has good orthogonally polarized radiation characteristics. The two layers of patches are placed concentrically, the high-frequency antenna patch is placed on the upper layer, and the low-frequency antenna patch is placed on the lower layer. The patch of the receiving antenna is larger than the patch of the transmitting antenna and can be used as the ground of the transmitting antenna. These two conductor patches form two resonant circuits with two resonant frequencies. By selecting the appropriate dielectric substrate, feeding position, patch size and patch spacing,...

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Abstract

The present invention discloses an antenna device for a portable broadband global area network system terminal, which comprises an antenna array, a closed structure and a feed network. Wherein, the antenna array is composed of a unit antenna. Supply networks of varied power distributions feed each unit antenna to get better main lobe directivity and avoid radiation zero arising from equal power feeding. In addition, a closed structure for strip-line feeding and power division network restricts impact due to spurious radiation of the power division network on the antenna directivity. Besides, an L-shaped bar feeding structure integrated with the feeding and power division network avoids structure discontinuity and processing complexity due to traditional coaxial feeding. Two points realize orthogonal feeding and right-hand circular polarization thus reducing processing deviation. A multipoint grounding structure is adopted to realize excellent impedance matching of the feeding and power division network. The antenna has the advantages of lower cost, light weight, simple processing and superior performance.

Description

technical field [0001] The invention relates to an antenna array or system, and belongs to a new type of antenna device for a portable terminal of a maritime satellite. Background technique [0002] BGAN is the English abbreviation of Broadband Global Area Network, and it is the fourth-generation global mobile satellite communication system provided by Inmarsat, the International Maritime Satellite Organization. It absorbs and is compatible with the communication advantages of 3G, combines the needs of portable mobile, broadband and network communication in satellite communication, and becomes a safe and reliable audio and video streaming media transmission, e-mail, network access for users who move freely around the world. A revolutionary communication system for accessing services. The system works in the L-band, and its receiving and sending frequencies correspond to 1525-1550MHz and 1626.5MHz-1660.5MHz respectively. In order to share one antenna for sending and receivi...

Claims

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Application Information

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IPC IPC(8): H01Q21/00H01Q13/08H01Q1/38
Inventor 房少军付世强
Owner DALIAN MARITIME UNIVERSITY
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