Circularly polarized antenna device

Abstract

The invention provides a circularly polarized antenna device. The device comprises a conductive ground plane, a dielectric substrate arranged on the conductive ground plane, and a number of radiatingpatches arranged on the surface of the dielectric substrate. Each radiating patch is a metal conductor used for receiving or transmitting signals. Each radiating patch comprises a number of symmetrically distributed inverted F-type radiating patch groups. Each inverted F-type radiating patch group comprises an A-type inverted F-type radiating patch and a B-type inverted F-type radiating patch. TheA-type inverted F-type radiating patches and the B-type inverted F-type radiating patches are symmetrically arranged. Each A-type inverted F-type radiating patch and each B-type inverted F-type radiating patch comprise a horizontally arranged upper part and a vertically arranged lower part respectively. According to the invention, a number of symmetrical inverted F-type radiating patch groups realize independent output of left-handed and right-handed circularly polarized signals; and the device has the advantages of simple processing, small size and light weight, and satisfies the applicationrequirement of dual circularly polarized signal receiving or transmitting, and is especially suitable for terminal devices of accurate measurement and guidance position systems.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to a circularly polarized antenna device. Background technique [0002] As a component used to transmit or receive radio waves, circularly polarized antennas play a vital role in wireless communication systems, especially in satellite communications and aircraft measurement and control equipment. [0003] The current satellite navigation and positioning equipment is widely used in fields such as positioning, measurement, timing, high-precision agriculture and intelligent transportation. In order to obtain high-precision positioning requirements above the decimeter level, navigation equipment generally adopts RTK (real-time dynamic differential method) technology. And axle ratio bandwidth), and more compact size, while processing and manufacturing should be simple. Due to the advantages of small shape, low cost, easy conformality, easy processing and easy realization o...

AI Technical Summary

Problems solved by technology

[0009] 1. Ordinary microstrip antennas generally implement a single-layer medium to achieve a working frequency band. This kind of working bandwidth is relatively narrow, and the working bandwidth is only about 5%. It cannot be well applied in ultra-wideband (spread spectrum) communication systems.

If the bandwidth is increased, it is often necessary to use a medium with a low dielectric constant as the antenna substrate material, and the antenna size will increase at this time

[0010] 2. Conventional helical antennas have good frequency bandwidth, beam width, symmetric pattern, and wide-angle circular polarization. The disadvantage is that only one polarization mode can be realized.

In the case where dual circular polarization is required, the application cannot be satisfied

[0011] 3. Array antenna (or element deformation), frequency bandwidth, symmetric pattern, wide-angle circular polarization performance is good, the disadvantage is that the beam is not wide enough, the structure is more complicated, and the size is larger

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