Four-frequency plane microstrip antenna with miniaturized microwave absorption structure

Abstract

The invention discloses a four-frequency plane microstrip antenna with a miniaturized microwave absorption structure. The four-frequency plane microstrip antenna with the miniaturized microwave absorption structure solves the problems that a microstrip antenna is large in size, poor in gathering collection effect and not suitable for multiple frequency bands in the prior art. The antenna comprises a dielectric substrate, a feeder wire, a four-branch radiating unit and grounding plates, wherein the feeder wire is arranged on the upper surface of the dielectric substrate and is used for receiving electromagnetic waves, the four-branch radiating element is connected with the feeder wire and is used for radiating electromagnetic waves, and the grounding plates are arranged on the upper surface of the dielectric substrate and are symmetrical about the feeder wire in a left-right mode. The feeder wire and the four-branch radiating unit are arranged in an outline formed by the inner edges of the grounding plates, the inner edges of the grounding plates at the left side and the right side of the four-branch radiating unit are of a symmetrical trapezoidal structure, the inner edges of the grounding plates at the lower side of the four-branch radiating unit are of the structure of two trapezoids which are symmetrical about the feeder wire, the inner edges of the grounding plates at the upper side of the four-branch radiating unit are of the structure of a plurality of continuous triangles, and the inner edges of the grounding plates at the left side and the right side of the feeder wire are of the structure of parallel straight lines. The miniaturized microwave absorption four-frequency microstrip antenna is small in size, concentrated in energy and capable of achieving omnidirectional radiation to four frequency bands.

Description

Technical field [0001] The invention relates to the technical field of wireless communication, in particular to a miniaturized quad-frequency planar microstrip antenna with a wave-absorbing structure. Background technique [0002] A microstrip antenna is on a thin dielectric substrate, one side is attached with a thin metal layer as a grounding plate, and the other side is made into a metal patch with a certain shape by photolithography etching method, using microstrip line or coaxial probe An antenna formed by feeding the patch. Microstrip antennas have the advantages of miniaturization, easy integration, and good directivity, and have been widely used in wireless communication technology. [0003] Commonly used communication frequency bands for wireless communication systems are RFID system (2.4GHz, 5.8GHz), IEEE802.11b / g (2.4GHz), IEEE802.11a (5.2GHz), WIMAX (3.3-3.7GHz) and WLAN (2.45GHz, 5.15- 5.85GHz). [0004] The earliest microstrip antenna is only suitable for one communi...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problems in the prior art that the microstrip antenna has a large volume, poor gathering and collection effect, limited radiation efficiency for electromagnetic waves in a specific frequency band, and is not suitable for multiple frequency bands, the present invention provides a four-frequency planar microstrip with a miniaturized wave-absorbing structure antenna

Images