Dual-band omnidirectional coupling branch loaded spiral antenna and manufacturing method thereof

Abstract

The invention relates to a dual-band omnidirectional coupling branch loaded spiral antenna and a manufacturing method thereof. The spiral antenna comprises a flexible dielectric substrate, wherein theflexible dielectric substrate is provided with a spiral antenna main body and a short circuit strip, the flexible dielectric substrate is connected with a grounding plate, the short circuit strip isperpendicular to the grounding plate, and the short circuit strip and the grounding plate are provided with a feed port therebetween; the spiral antenna main body comprises a main body radiation spiral arm I, a coupling branch spiral arm I, a main body radiation spiral arm II and a coupling branch spiral arm II which are sequentially arranged at equal intervals along an extension direction of theshort circuit strip, the starting points of the main body radiation spiral arm I and the main body radiation spiral arm II are located on the short circuit strip, and the starting points of the coupling branch spiral arm I and the coupling branch spiral arm II are close to the short circuit strip. The dual-band omnidirectional coupling branch loaded spiral antenna not only can obtain an omnidirectional antenna operating at dual bands, but also adopts a four-arm single-feed technology, is novel in structure and improves the consistency and the product reliability.

Description

technical field [0001] The invention relates to the field of antennas, in particular to a dual-frequency omnidirectional coupling branch-loaded helical antenna. Background technique [0002] The helical antenna is an antenna with circular polarization and wide beam characteristics, and has the advantages of compact structure and strong environmental adaptability. It is widely used in radio technology fields such as satellite communications and global positioning systems. However, as a resonant antenna, the helical antenna has a narrow bandwidth and cannot meet the requirements of multiple systems and multiple frequency bands. [0003] The authorized announcement number is CN205646139U patent "an omnidirectional four-arm helical antenna device", which provides a solution. The main body of the antenna is composed of four helical radiating arms on a flexible dielectric circuit board. The four helical radiating arms pass through a The matching line is connected, and its input t...

AI Technical Summary

Problems solved by technology

However, although the above-mentioned dual-frequency quadrifilar helical antenna overcomes the problem of single-frequency point operation, its bandwidth is relatively narrow, and the range of available frequency bands is limited.

[0005] In addition, traditional four-arm helical antennas mostly use technologies such as four-arm four-feed and eight-arm four-feed to directly feed the received satellite signal to the circuit for processing, and there are problems with consistency and product reliability.

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