Novel ultra wide band planar spiral antenna integrated with Balun structure

Abstract

The invention discloses a novel ultra wide band planar spiral antenna integrated with a Balun structure. The ultra wide band planar spiral antenna comprises a planar spiral antenna, a feeding Balun, a microstrip line and a dielectric substrate, wherein the planar spiral antenna comprises a first antenna arm and a second antenna arm, the first antenna arm and the second antenna are respectively printed on the front side and the back side of the dielectric substrate, the second antenna arm is obtained by rotating the first antenna arm around an original point for 180 degrees, the first antenna arm comprises a first boundary and a second boundary, the second boundary is obtained by rotating the first boundary around the original point for 180 degrees, the second antenna arm is connected with a floor of the feeding Balun to jointly form a ground plane of the antenna, and the first antenna arm is connected with a central conductor of the feeding Balun via the microstrip line. The antenna disclosed by the invention has the characteristics of wide arm width and short antenna arms, and co-planar feeding can be easily achieved.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a novel ultra-wideband planar helical antenna integrating a balun structure. Background technique [0002] With the rapid development of modern wireless communication technology, communication systems have higher and higher requirements for antennas. On the one hand, a wide frequency band is required, and it is hoped that an antenna can support wireless communication in multiple frequency bands at the same time. On the other hand, miniaturization is required. With the rapid development of high-speed integrated circuits, system equipment is moving towards integration, miniaturization, and integration. As the terminal of wireless electronic equipment, modern electronic equipment proposes a miniaturized and easy-to-integrate antenna. Require. [0003] Planar helical antenna is a commonly used broadband circularly polarized antenna. There are two main types of traditional pl...

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Problems solved by technology

[0005] Two kinds of planar helical antennas with classical design, the form is fixed, which restricts the research of the feeding method of helical antenna

Under the condition of the same size, the circular polarization bandwidth of the Archimedes antenna is wider than that of the Archimedes antenna. However, the arm width of the Archimedes antenna is very narrow, and the arm length is long, so it is not easy to feed in the same plane

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