A Microstrip Patch Antenna Based on Photonic Crystal Structure

Abstract

The invention discloses a microstrip patch antenna based on a photonic crystal structure, which comprises a dielectric substrate, a metal grounding layer is arranged on the back of the dielectric substrate, and a radiation branch is arranged in the center of the front of the dielectric substrate, and the radiation branch is a mirror-symmetric four-helix structure , and it is surrounded by a photonic crystal band gap layer. The photonic crystal band gap layer is composed of several metal patches arranged periodically. The center of the metal patch is connected to the metal ground layer through a conductive via hole, and the metal ground layer is connected to the metal ground layer through the feed port. The radiation branch is connected, and the end of the feed port performs signal transmission with the outside world through the SMA connector. The present invention introduces a photonic crystal bandgap layer around the radiation branches, which effectively solves the disadvantages of low gain and narrow bandwidth of the microstrip antenna, and the two are separated by a certain distance to reduce the mutual coupling between them, effectively ensuring the working characteristics of the antenna; In addition, the structure of the radiation stub can effectively increase the current path and realize the miniaturization of the antenna.

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, the existence of excited surface waves and dielectric loss makes most of the antenna The energy of the microstrip antenna is consumed so that the gain of the microstrip antenna is low and the radiation efficiency is not high

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