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L-waveband broadband circular polarization micro-strip antenna

A technology of microstrip antenna and circular polarization, applied in the field of L-band broadband circularly polarized microstrip antenna and antenna, can solve the problems of limited performance, impedance bandwidth and narrow circular polarization bandwidth, and achieve easy tuning and wide impedance Bandwidth and Circular Polarization Bandwidth, Effect of Improving Performance

Inactive Publication Date: 2014-01-01
DALIAN MARITIME UNIVERSITY
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Problems solved by technology

However, the inherent impedance bandwidth and circular polarization bandwidth of the microstrip antenna are narrow, and the typical frequency bandwidth is from a few tenths of a percent to a few percent, which greatly limits its performance. Therefore, the development of a broadband circularly polarized microstrip antenna of great significance

Method used

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  • L-waveband broadband circular polarization micro-strip antenna
  • L-waveband broadband circular polarization micro-strip antenna
  • L-waveband broadband circular polarization micro-strip antenna

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Embodiment Construction

[0030] Such as figure 1 , figure 2 , image 3 with Figure 4A kind of L-band broadband circularly polarized microstrip antenna shown is characterized in that it comprises an upper layer radiation antenna dielectric substrate 1 and a lower layer feed network dielectric substrate 2; the upper surface of the upper layer radiation antenna dielectric substrate 1 is printed with radiation stickers The radiation patch includes a main antenna radiation patch 11 placed in the center and four parasitic radiation patches 12 symmetrically distributed around the antenna main radiation patch 11; the lower surface of the upper radiation antenna dielectric substrate 1 Four coupling patches 13 are printed; the upper surface of the lower feed network dielectric substrate 2 is provided with a ground plate 21, and the lower surface of the lower feed network dielectric substrate 2 is printed with micro There is an air gap 4 between the upper layer radiation antenna dielectric substrate 1 and t...

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Abstract

The invention discloses an L-waveband broadband circular polarization micro-strip antenna which comprises an upper-layer radiating antenna dielectric substrate and a lower-layer feed network dielectric substrate; a radiation patch is printed on the upper surface of the upper-layer radiating antenna dielectric substrate; four coupling patches are printed on the lower surface of the upper-layer radiating antenna dielectric substrate; an earth plate is arranged on the upper surface of the lower-layer feed network dielectric substrate, and a micro-strip power dividing phase-shifting feed network with one input end and four output ends is printed on the lower surface of the lower-layer feed network dielectric substrate; an air gap is formed between the upper-layer radiating antenna dielectric substrate and the lower-layer feed network dielectric substrate; each coupling patch is connected with one output end of the micro-strip power dividing phase-shifting feed network through a metal probe. The L-waveband broadband circular polarization micro-strip antenna is simple in structure, low in cost, easy to tune, wide in impedance bandwidth and circular polarization bandwidth and suitable for application to a maritime satellite communication system and a satellite positioning navigation system terminal.

Description

technical field [0001] The invention relates to antenna technology in the field of wireless communication, in particular to an L-band broadband circularly polarized microstrip antenna. Background technique [0002] Broadband Global Area Network (BGAN) is the fourth-generation global mobile satellite communication system provided by the International Maritime Satellite Organization (INMARSAT). Demand, to become a revolutionary communication system that provides safe and reliable audio and video streaming media transmission, email, and network access services to users who move freely around the world. The system works in the L-band, and its receiving and sending frequencies correspond to 1525 ~1550MHz and 1626.5~1660.5MHz. In order to share one antenna for sending and receiving, the working frequency band of the antenna is designed to be 1525-660.5MHz, and the relative bandwidth is 8.5%. The loss is small. [0003] The predecessor of the Global Positioning System (GPS) is a...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q13/08H01Q21/30H01Q1/50
Inventor 傅世强孔庆功房少军王钟葆
Owner DALIAN MARITIME UNIVERSITY
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