Wide band network feed medium load circular polarization four-arm spiral antenna

A medium-loaded, broadband network technology, applied in the direction of antenna, electrical components, radiation element structure, etc., can solve the problems of difficult adjustment, high processing precision requirements, narrow bandwidth of circularly polarized four-armed helical antenna, etc., to avoid imbalance The effect of feeding

Inactive Publication Date: 2012-10-31
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of the existing medium-loaded circularly polarized four-arm helical antenna with narrow bandwidth, high processing accuracy requirements and difficult adjustment, and provide a broadband network feed medium-loaded circularly polarized four-arm helical antenna

Method used

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  • Wide band network feed medium load circular polarization four-arm spiral antenna
  • Wide band network feed medium load circular polarization four-arm spiral antenna
  • Wide band network feed medium load circular polarization four-arm spiral antenna

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Embodiment

[0027] The antenna structure of the present invention is as figure 1 , Figure 2a , Figure 2b , Figure 2c , Figure 3a with Figure 3b As shown, the antenna consists of a feed network and a radiating body. The feeding network is composed of microstrip dielectric plates (3) and (4) stacked up and down with the same shape, and the contacting side of the microstrip dielectric plates (3) and (4) forms a common floor (5) in the middle; the microstrip dielectric plate ( 3) Wilkinson power splitters (7) and (8) are printed on the side facing the radiating body and the side of the microstrip dielectric plate (4) facing away from the radiating body, respectively, and the setting positions of the power splitters (7) and (8) Symmetrical to the center of circle of the microstrip dielectric plate (3) or (4); power dividers (7) and (8) are respectively printed with feed lines (1) and (2) as feed ports, feed lines ( 1) and (2) are both 25Ω transmission lines, so that they can be conn...

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Abstract

The invention relates to a wide band network feed medium load circular polarization four-arm spiral antenna. The wide band feed network carries out uniform amplitude and 90 degree phase difference feed on the four-wire spiral, overcomes the problems of narrow wide band, inconvenient adjustment and correction, and high processing requirement caused by 90 degree phase difference generated by self phase shift of traditional circular polarization four-arm spiral antennae, and meanwhile avoids required designing of balun due to unbalanced feed. The antenna is compact in structure and simple in design, has excellent wide band circular polarization feature, and is very suitable for portable mobile terminals.

Description

technical field [0001] The invention relates to a medium-loaded helical antenna, in particular to a medium-loaded four-arm helical antenna structure that adopts broadband network feed, can work in a wide frequency band, has small volume, and is suitable for hand-held terminals. Background technique [0002] In recent years, the service of satellite communication network has been paid more and more attention. With the increasing popularity of GPS and Beidou applications, there is an urgent need for a portable mobile terminal that can communicate with satellites anytime and anywhere. As the "eyes and ears" of the receiver, the performance of the antenna directly affects the quality of the receiver signal. [0003] The circularly polarized quadrifilar helical antenna was first proposed by C.C.Kilgus in 1968. The structure is composed of four metal helical wires, the four metal wires are fed through the coaxial line, and the phase shift is introduced at the feeding end, so tha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/38H01Q13/00H01Q13/08
Inventor 褚庆昕杜述刘沙
Owner SOUTH CHINA UNIV OF TECH
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