Ultra wide band four-tape circularly polarized antenna

Abstract

The invention discloses an ultra wide band four-tape circularly polarized antenna which comprises a metal floor (1), a dielectric substrate (2), a radiation patch (3), a feed branch node (4), a matching branch node (5) and a micro strip line feed source (6), wherein the radiation patch (3), the feed branch node (4) and the matching branch node (5) are printed on the positive surface of the dielectric substrate (2) and are electrically connected with the micro strip line feed source (6) as well as are of a shaft symmetric shaft; a T type groove (7) is etched on the metal floor (1) which is used as a radiation reflection plate of the radiation patch (3); the center of the radiation patch (3) is etched with a polarized hole (8), the edge of the polarized hole (8) is provided with two mutually orthorhombic gaps (9) and (10), an intersection point of the two gaps is coincident with the center point of the polarized hole (8); and the micro strip line feed source (6) is placed on the edge of the dielectric substrate (2). The invention can realize that wide band four-tape circularly polarization characteristic with a wide polarization band, and can be applied to satellite communication.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to an ultra-wideband four-band circularly polarized antenna, which can be used for global microwave interconnection access to Wimax, wireless local area network WLAN, UHF X radar band and UHF Ku radar band for communication. Background technique [0002] With its simple structure, low profile, one-dimensional miniaturization, and easy integration, microstrip antennas meet the development trend and requirements of modern wireless communication systems and are used more and more widely. The quality of a wireless communication system depends on the antenna, transmitter power, receiver sensitivity and signal processing, and the antenna plays a key role. Compared with the previous single-standard communication standards, current marketers hope that different technical standards can be applied to the same antenna, and different communication coding methods are used for comple...

AI Technical Summary

Problems solved by technology

In the research, the monopole antenna structure is mostly used to realize the ultra-wideband characteristics of the antenna. The method is simple and easy to implement, but the polarization mode of this antenna is generally linear polarization, and it is difficult to realize the multi-band circular polarization function of the antenna.

Some researchers use multiple orthogonal feed sources or multi-layer dielectric substrates in the antenna to achieve multi-band circular polarization characteristics. Although this structure has good circular polarization performance, it is difficult for the antenna to achieve ultra-wideband characteristics, and its own Increased antenna complexity and coupling between different frequency bands and polarizations, resulting in increased antenna cost and debugging difficulty

There are also some studies that use multi-band circularly polarized antennas composed of curved microstrip lines. This kind of structure is irregular, and its feeding position cannot be determined by numerical methods. It is not common in practice, and the structure is relatively complicated, mainly relying on Practical engineering experience to achieve its purpose, subject to certain restrictions in practical application

Due to the shortcomings of the above methods, their application in the field of mobile terminals and satellite communications is limited.

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