Resistance loading monopole antenna

Abstract

The invention discloses a resistor loading monopole antenna, and belongs to the technical field of microwave and millimeter wave antennas. The antenna structurally comprises an antenna unit, a dielectric substrate, a metal floor printed on the back surface of the dielectric substrate and conduction bands on the two sides, which are sequentially stacked from bottom to top, the bottom conduction band is connected with the top patch unit through the via hole, and the antenna achieves the influence on an antenna radiation pattern through loading the patch resistor, improves the gain of the antenna, and obtains a monopole antenna with more excellent radiation performance. Compared with a traditional phase monopole antenna, by means of the structural design, the performance of the antenna is improved, the effect of size miniaturization of the metasurface antenna is achieved, and the metasurface antenna has the advantages of being low in cost, small in size, light in weight, high in efficiency and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of microwave and millimeter wave antennas, and in particular relates to a resistance-loaded monopole antenna. Background Art

[0002] With the rapid development of modern wireless technology, the requirements for communication equipment are becoming more and more miniaturized and broadband. In order to adapt to the development of modern communication technology, the design requirements for antennas are becoming higher and higher, among which the two most prominent points are broadband and miniaturization. Planar monopole antennas with simple structure, good radiation performance, and easy integration with wireless communication systems have also been increasingly widely used, and people have never stopped researching small broadband planar monopole antennas. With the development of antenna design technology, loading traditional antenna structures to improve antenna performance and achieve broadband and miniaturization has become a more common means. Therefore, it is of great practical significance to study the application of antenna loading technology in expanding the bandwidth of planar monopole antennas. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a resistance-loaded monopole antenna to achieve a monopole antenna with better radiation performance.

[0004] The technical solution adopted by the present invention to solve the technical problem is:

[0005] A resistance-loaded monopole antenna comprises a dielectric substrate 2, an antenna unit 1 and a metal floor 3, wherein the antenna unit 1 and the metal floor are respectively arranged on the upper and lower surfaces of the dielectric substrate;

[0006] The antenna unit 1 includes a main patch 1-1 and a rectangular branch 1-2; the rectangular branch is connected to one side of the main patch;

[0007] The lower surface of the dielectric substrate is also provided with an L-shaped conductive strip; the L-shaped conductive strip includes longitudinal branches and transverse branches which are perpendicular to each other and connected at adjacent ends; one end of the longitudinal branch is connected to the metal floor, and the other end is connected to the transverse branch through a chip resistor;

[0008] There are two L-shaped guide belts, and the two L-shaped guide belts are located on the same side of the metal floor; the two L-shaped guide belts are mirror-symmetrical, and the transverse branches of the two L-shaped guide belts are opposite;

[0009] On the main patch, two metal vias 1-3 are arranged on a side away from the rectangular branch 1-2; the metal vias penetrate the dielectric substrate and are connected to the ends of the corresponding horizontal branches.

[0010] Furthermore, the metal vias correspond to the transverse branches one by one.

[0011] Furthermore, one end of the transverse branch is connected to the chip resistor, and the top of the other end is connected to the metal via.

[0012] Furthermore, the metal floor is located directly below the rectangular branch.

[0013] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0014] The antenna is loaded with patch resistors to affect the antenna radiation pattern, improve the antenna gain, and obtain a monopole antenna with better radiation performance. Compared with the traditional monopole antenna, this structural design not only improves the performance of the antenna, but also achieves the effect of miniaturization of the metasurface antenna size, with the characteristics of low cost, small size, light weight, and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0016] Figure 1 is a front view schematic diagram of the resistance-loaded monopole antenna of the present invention;

[0017] Figure 2 is a schematic diagram of the back side of the resistor-loaded monopole antenna of the present invention;

[0018] Figure 3 It is the S parameter simulation diagram of the resistance-loaded monopole antenna of the present invention;

[0019] Figure 4 This is a current distribution diagram on the front surface of the resistance-loaded monopole antenna of the present invention. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure more clear, the embodiments of the present disclosure are further described in detail in combination with the embodiments and drawings. The schematic implementation methods of the embodiments of the present disclosure and their descriptions are only used to explain the embodiments of the present disclosure and are not intended to limit the embodiments of the present disclosure.

[0021] Reference Figure 1 to Figure 2 The present embodiment is a resistor-loaded monopole antenna, the structure of which includes an antenna unit, a dielectric substrate, a metal floor printed on the back of the dielectric substrate, and conductive strips on both sides, which are stacked in sequence from bottom to top; the antenna unit 1 is composed of a main patch printed on the front of the dielectric substrate, a rectangular branch, and a metal via passing through the dielectric substrate; the L-shaped conductive strip 4 is composed of two mutually perpendicular branches;

[0022] The main patch 1-1 has a long side of 15.5 mm, a short side of 1.8 mm, a height of 9 mm, and a transition height of 1.5 mm.

[0023] Rectangular branch 1-2 is a rectangular branch with a long side of 7.5 mm and a short side of 1.8 mm.

[0024] The diameter of the metal vias 1-3 is 0.3 mm.

[0025] The dielectric substrate 2 has a long side of 25 mm, a short side of 21 mm, and a thickness of 0.8 mm.

[0026] The dielectric substrate 2 is made of Rogers 4003C plate with a relative dielectric constant of 3.55.

[0027] The guide strip 4 is L-shaped, with a long side length of 8.5 mm, a short side length of 3.5 mm, and a width of 0.7 mm. The distance between the guide strip and both ends of the metal floor 3 is 2.5 mm.

[0028] The top of the long side of the conductive strip 4 is loaded with a chip resistor 5 .

[0029] The metal floor 3 is a rectangular structure with a long side of 25 mm and a short side of 7 mm.

[0030] The above resistor-loaded monopole antenna is simulated and tested. Figure 3 : is the S parameter simulation diagram of the present invention. It can be seen from the S parameters of the present invention that the S11 value of the resistance-loaded monopole antenna of the present invention in the 7-9.5 GHz frequency band is less than -10 Db, which indicates that the resistance-loaded monopole antenna of the present invention has a wide bandwidth; Figure 4 The surface current distribution diagram of the front side of the resistor-loaded monopole antenna of the present invention shows that the surface current of the rectangular radiation part of the antenna is mainly distributed on the edge of the lower part of the rectangle and the edges on both sides. At the same time, it is the surface current of these parts that determines the main radiation characteristics of the antenna.

[0031] The above is a preferred embodiment of the present application. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A resistor-loaded monopole antenna, comprising a dielectric substrate (2), an antenna unit (1) and a metal floor (3), characterized in that: The antenna unit (1) and the metal floor are respectively arranged on the upper and lower surfaces of the dielectric substrate; The antenna unit (1) comprises a main patch (1-1) and a rectangular branch (1-2); the rectangular branch is connected to one side of the main patch; The lower surface of the dielectric substrate is also provided with an L-shaped conductive strip; the L-shaped conductive strip includes longitudinal branches and transverse branches which are perpendicular to each other and connected at adjacent ends; one end of the longitudinal branch is connected to the metal floor, and the other end is connected to the transverse branch through a chip resistor; There are two L-shaped guide belts, and the two L-shaped guide belts are located on the same side of the metal floor; The two L-shaped conduction bands are mirror-symmetrical, and the transverse branches of the two L-shaped conduction bands are opposite; Two metal vias (1-3) are arranged on the main patch at a side away from the rectangular branch (1-2); the metal vias penetrate the dielectric substrate and are connected to the ends of the corresponding transverse branches.

2. A resistor-loaded monopole antenna according to claim 1, characterized in that: The metal vias correspond to the transverse branches one by one.

3. A resistor-loaded monopole antenna according to claim 1, characterized in that: One end of the transverse branch is connected to the chip resistor, and the top of the other end is connected to the metal via.

4. The resistor-loaded monopole antenna according to claim 1, characterized in that: The metal floor is located directly below the rectangular branch.

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