Microstrip patch antenna based on photonic crystal structure

Abstract

The invention discloses a microstrip patch antenna based on a photonic crystal structure. The microstrip patch antenna comprises a dielectric substrate, wherein a metal grounding layer is arranged on the back side of the dielectric substrate; radiation branch nodes are arranged in the center of the front side of the dielectric substrate; the radiation branch nodes are of a four-helical structure in mirror symmetry; a photonic crystal forbidden band layer surrounds the radiation branch nodes; the photonic crystal forbidden band layer consists of a plurality of metal patches which are arranged in a periodic manner; the centers of the metal patches are connected with the metal grounding layer through conductive through holes; the metal grounding layer is connected with the radiation branch nodes through feed ports; signal transmission between the end parts of the feed ports and the outside can be achieved through SMA connectors. As the photonic crystal forbidden band layer is introduced around the radiation branch nodes, the defects that a microstrip patch antenna is low in gain and narrow in bandwidth are effectively solved, and moreover as the photonic crystal forbidden band layer is in certain distance from the radiation branch nodes, the mutual coupling is reduced, and the working property of the antenna is effectively ensured; in addition, due to the structure of the radiation branch nodes, current paths can be effectively increased, and the antenna can be minimized.

Description

technical field [0001] The invention belongs to the technical field of microstrip antennas, in particular to a microstrip patch antenna based on a photonic crystal structure. Background technique [0002] The concept of photonic crystals was proposed in the 1980s. Its biggest characteristic is that it has a forbidden band characteristic, that is, within the forbidden band range, it can suppress the surface waves propagating on its surface, or it does not support a certain frequency band. propagation of surface waves. Because of its small size, light weight, low profile, low cost, suitable for circuit integration and many other advantages, the microstrip antenna has been widely used in wireless communication systems, and plays its role in many fields such as mobile communication, satellite communication and aerospace. important role. But at the same time, some shortcomings of the microstrip antenna itself also limit its greater performance. Since the microstrip antenna is a...

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Problems solved by technology

But at the same time, some shortcomings of the microstrip antenna itself also limit its greater performance. Since the microstrip antenna is a resonant antenna, its operating frequency band is relatively narrow; in addition,

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