CN114421133A - Low-cost full-band high-precision positioning metal film antenna - Google Patents

Abstract

The embodiment of the invention discloses a low-cost full-band high-precision positioning metal film antenna which comprises an antenna bottom plate, a combiner circuit and a planar four-arm sine antenna, wherein the planar four-arm sine antenna consists of four completely symmetrical sine arms, the combiner circuit is integrated on the antenna bottom plate, the combiner circuit adopts four-point feeding, the antenna bottom plate is arranged at the central position of the planar four-arm sine antenna, the tail ends of the sine arms close to the central point are respectively connected with the combiner circuit on the antenna bottom plate, and the planar four-arm sine antenna is made of a transparent metal film material. The planar four-arm sine antenna adopted by the invention is a broadband antenna, supports the full frequency band of GNSS, has high phase precision and large gain, and can realize high-precision positioning by using a passive antenna; the invention adopts the plane four-arm sine antenna, can be easily pasted on the windshield, is convenient to install, can realize high-precision positioning of the automobile, has low cost, is easy to manufacture in batches and has wide application scenes.

Description

Low-cost full-band high-precision positioning metal film antenna

technical field

The invention relates to the technical field of satellite navigation, in particular to a low-cost full-frequency high-precision positioning metal film antenna.

Background technique

The global satellite navigation system refers to a space-based radio navigation and positioning system that can provide users with all-weather 3-dimensional coordinates, speed and time information at any location on the earth's surface or near-Earth space. The difference between the launch time of the satellite signal and the time it arrives at the receiver is called the pseudorange. In order to calculate the user's three-dimensional position and the receiver clock offset, the pseudorange measurement requires that signals from at least four satellites be received. With the development of global integration, satellite navigation systems are used in various fields such as aviation, car navigation, communication, surveying and mapping, and entertainment.

At present, there are four major satellite positioning systems in the world: the US Global Positioning System (GPS), the Soviet/Russian Global Navigation Satellite System (GLONASS), the European Space Agency's Galileo Satellite Positioning System and China's Beidou Navigation Satellite System.

The current mainstream full-band high-precision antennas have the following defects and deficiencies:

1. Ordinary full-band high-precision measurement antennas are bulky, expensive, and heavy. They need to be installed through a special base and cannot be pasted on the windshield of a car.

2. Although the quadrifilar helical antenna is small in size, it has the disadvantages of large profile, small gain and narrow bandwidth. Generally, it is not used in the whole frequency band, and the quadrifilar helical antenna cannot be pasted on the windshield of the car.

Since the working frequency bands of each navigation system are quite different, and in many cases, multiple navigation systems need to be used, it is necessary to invent a navigation antenna that supports all civil navigation systems (a circularly polarized antenna with a working frequency band of 1.175GHz to 1.607GHz) At the same time, the antenna is required to have high phase accuracy and low cost, and can be used in high-precision positioning scenarios.

In actual use, we need to design a full-band high-precision antenna that can be pasted on the surface of the windshield to achieve high-precision positioning of the car.

SUMMARY OF THE INVENTION

The technical problem to be solved by the embodiments of the present invention is to provide a low-cost full-band high-precision positioning metal film antenna, so that it can be pasted on the surface of the windshield to realize high-precision positioning of the vehicle.

In order to solve the above technical problems, an embodiment of the present invention proposes a low-cost, full-band, high-precision positioning metal thin film antenna, which includes an antenna base plate, a combining circuit, and a planar four-arm sinusoidal antenna. The planar four-arm sinusoidal antenna consists of four complete It is composed of symmetrical sinusoidal arms, and the combined circuit is integrated on the antenna base plate. The combined circuit adopts four-point feeding. The antenna base plate is set at the center of the planar four-arm sinusoidal antenna. The ends of each sinusoidal arm near the center point are respectively connected to the antenna. The combined circuit on the base plate, the planar four-arm sinusoidal antenna is made of transparent metal film material.

Further, the difference between the feeding points of the combined circuit is 90°, and three 90° broadband patch bridge components are used to realize the function of right-handed circular polarization.

Further, the planar four-arm sinusoidal antenna adopts a planar sinusoidal structure.

The beneficial effects of the present invention are as follows: the plane four-arm sinusoidal antenna adopted by the present invention is a broadband antenna and supports the full frequency band of GNSS; the four-point feeding plane four-arm sinusoidal antenna is a high-precision antenna, with high phase precision and large gain, and uses passive The antenna can realize high-precision positioning; the plane four-arm sinusoidal antenna made of transparent metal film material can be easily pasted on the windshield, and the installation is convenient, and high-precision positioning of the car can be realized, and the cost is low and easy to use. Batch manufacturing, wide range of application scenarios.

Description of drawings

FIG. 1 is a three-dimensional structural diagram of a low-cost, full-band, high-precision positioning metal thin film antenna according to an embodiment of the present invention.

FIG. 2 is a front view of a low-cost full-band high-precision positioning metal thin film antenna according to an embodiment of the present invention.

FIG. 3 is a side view of a low-cost full-band high-precision positioning metal thin film antenna according to an embodiment of the present invention.

Explanation of reference numerals

Antenna base plate 1, sinusoidal arm 2, feeding probe 3.

Detailed ways

It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other without conflict, and the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

If there are directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention, they are only used to explain the relative positions of various components under a certain posture (as shown in the accompanying drawings). relationship, movement situation, etc., if the specific posture changes, the directional indication changes accordingly.

In addition, in the present invention, descriptions involving "first", "second", etc. are only for description purposes, and should not be interpreted as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature.

Referring to FIG. 1 to FIG. 3 , the low-cost, full-band, high-precision positioning metal thin film antenna according to an embodiment of the present invention includes an antenna base plate, a combined circuit, and a planar four-arm sinusoidal antenna.

The planar four-arm sinusoidal antenna is composed of four completely symmetrical sinusoidal arms, and the ends of the sinusoidal arms near the center point are respectively connected to the combined circuit on the antenna base plate. The planar four-arm sinusoidal antenna is made of transparent metal film material. During the specific implementation, the four feeding probes can be welded on the antenna base plate for feeding, or the spring sheet installed on the antenna base plate can be used to crimp the power feeding.

The combiner circuit is integrated on the antenna base plate, and the combiner circuit adopts four-point feeding, and the antenna base plate is arranged at the center position of the planar four-arm sinusoidal antenna.

As an embodiment, the difference between the feeding points of the combined circuit is 90°, and three 90° broadband patch bridge components are used to realize the function of right-handed circular polarization.

As an implementation manner, the planar four-arm sinusoidal antenna adopts a planar sinusoidal structure. The diameter can be 130 mm.

As an embodiment, the low-cost full-band high-precision positioning metal film antenna further includes a PET film, and the antenna base plate and the planar four-arm sinusoidal antenna are arranged on the PET film. The invention can be directly pasted on the windshield through the PET film as a high-precision positioning and navigation antenna, which is convenient to use and does not affect the line of sight.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (3)

1. The utility model provides a low-cost full-band high accuracy location metal film antenna, includes antenna substrate and closes way circuit, its characterized in that still includes plane quadrifilar sinusoidal antenna, and plane quadrifilar sinusoidal antenna comprises four sinusoidal arms of complete symmetry, and close way circuit integration on the antenna substrate, close way circuit adoption four-point feed, the central point that the antenna substrate was established at plane quadrifilar sinusoidal antenna puts, and each sinusoidal arm is close to the terminal of central point and connects the way circuit on the antenna substrate respectively, plane quadrifilar sinusoidal antenna adopts transparent metal film material to make.

2. The low-cost full-band high-precision positioning metal thin-film antenna according to claim 1, wherein the difference between the feeding points of the combining circuit is 90 °, and 3 90 ° broadband patch bridge devices are used to realize the right-hand circular polarization function.

3. The low-cost full-band high-precision positioning metal film antenna according to claim 1, wherein the planar four-arm sine antenna adopts a planar sine structure.

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