Hollow polygonal double-frequency single-layer micro-strip antenna

Abstract

A hollow polygonal double-frequency single-layer micro-strip antenna put forward by the invention adopts a hollow polygonal micro-strip radiation mode. Compared with an ordinary micro-strip antenna, the micro-strip antenna can work at two frequencies at the same time and the low-elevation gain thereof is improved significantly under the premise of not increasing the thickness of the antenna. The micro-strip antenna comprises a metal radiation plate, a dielectric substrate and a metal reflection base plate, wherein the metal radiation plate and the metal reflection base plate are respectively arranged on the upper and lower surfaces of the dielectric substrate. The metal radiation plate is a hollow metal radiation plate with the center area being removed, and the geometric shape of the hollow area is a polygon, so that the surface current flows along the edge of the hollow area, and radiation or reception of electromagnetic wave signals of two working frequencies (a high frequency point and a low frequency point) is realized by changing the current path. Coaxial feed points are arranged on the metal radiation plate to connect a feeder and feed in electromagnetic wave signals.

Description

technical field [0001] The invention belongs to the technical field of satellite navigation, in particular to a hollow polygonal double-frequency single-layer microstrip antenna. It is used in the Beidou satellite navigation system, and is also applicable to various navigation satellite systems including the GPS system of the United States, the Galileo system of Europe, and the GLONASS system of Russia. Background technique [0002] The Beidou satellite navigation system is the third mature satellite navigation system after the GPS system of the United States and the GLONASS system of Russia. Affected by the orbit of Beidou navigation satellites, satellite navigation receivers are used on land in China, and most satellites of the Beidou system are distributed at elevation angles between 15 degrees and 75 degrees. Therefore, an ideal receiving antenna has the strongest gain at an elevation angle of 15° to 75°. However, the current microstrip antennas have the strongest gain...

AI Technical Summary

Problems solved by technology

The current dual-frequency point microstrip antenna mostly adopts the form of stacking two dielectric plates, so the dual-frequency point microstrip antenna is often thick and cannot adapt to applications with strict size requirements.

Images