KR200385313Y1 - Cubic microstrip antenna - Google Patents

Abstract

A cubic microstrip antenna comprising a connecting section for connecting an antenna circuit of a set of communication equipment and a signal receiving and transmitting antenna section, the antenna section comprising a hollow column having a set length, the hollow column having a specific length. An axially extending slit is provided and a transversely extending slit is provided near the bottom end of the column that extends from the outer periphery towards the center of the hollow column to communicate with the axially extending slit. Thus, a long section having a length equal to a set length and a short section having a shorter length are formed on the hollow column, and the long section is used as a high frequency receiving and transmitting region, while It is used as a low frequency reception and transmission area. Cubic microstrip antennas can increase manufacturing excellence and improve reception and transmission quality.

Description

Cubic microstrip antenna

The present invention relates to a microstrip antenna, and more particularly to a cubic microstrip antenna that can increase the superiority of the fabrication of the microstrip circuit structure and make the reception and transmission quality more stable and reliable.

Spiral coils formed by winding metal wires are a major component of antennas for signal reception and transmission, and such a spiral antenna structure may affect the function of the entire antenna. For example, one spiral antenna is known from British Patent No. 2,206,243 made of wire of copper plated steel, the diameter of the wire, the core diameter of the spiral, the pitch and the total length of the spiral, all of which are appropriate for the whole antenna and Affects the set function.

As a general mechanism using such a spiral antenna, for example a mobile phone, the spiral coil is placed in the inner hole of the insulated outer sleeve, so that the spiral coil is elastically axially compressed inside the outer sleeve. It is assembled in the hole. Due to the nature of the helical coil, this assembled structure may have an unexpected effect on the pitch and overall length of the spiral, ie the pitch of the helical coil may change after assembly and the total length after assembly may be There will be no fear. Mass production of helical coils having structures assembled in a conventional manner can easily lead to different phenomena, in particular the quality of the antenna.

Moreover, some cell phones used so far have dual frequencies, including more than one kind of frequency, for example 900 MHZ and 1800 MHZ. There are many ways to reliably produce two frequency antennas of various structures, for example the dual frequency spiral antenna known from British Patent No. 2,206,243 is formed of an elongated coil and a linear conductor extending into the coil. In recent spiral designs, however, even single coils with different densities can be used to form two frequencies. These spirals have a tighter winding section (shorter section) and a looser winding section (larger section), so that the two frequencies required can be obtained. Therefore, while maintaining different pitches of spirals is very important, assembled structures of conventional spiral antennas tend to break the set pitch and length by elastically compressing the spirals, adversely affecting proper functioning.

 Spiral antennas, which are widely used today, are generally classified into two main types, including extended and stationary, and whatever type is used, the spiral antenna has a certain length of protrusion that protrudes from the main body of the mobile phone under normal circumstances. As such, a variety of antennas have been developed, which use microstrip antennas that are planar, concealed and conserve space. Although the microstrip antenna has the advantage of hiding and saving space, the protruding helix in the form of a cubic column has a stable and reliable quality of reception and transmission.

 The main purpose of the present invention is to provide a cubic microstrip antenna that can increase manufacturing excellence, reduce work time and cost, and improve reception and transmission quality.

In order to achieve the above object, the present invention includes a connection section and a signal receiving and transmitting antenna section for connecting the antenna circuit of a set of communication equipment. The antenna section includes a hollow column having a set length, the hollow column being provided with an axially extending slit having a specific length and extending toward the center of the hollow column from an outer periphery near the bottom end of the column to extend the axially. A transversely extending slit is provided that is in communication with the slit. Thus, a long section having a length equal to a set length and a short section having a shorter length are formed on the hollow column, and the long section is used as a high frequency receiving and transmitting region, while It is used as a low frequency reception and transmission area.

When reading the detailed description of the preferred embodiment with reference to the accompanying drawings, it will be apparent that the novelty and other features of the present invention.

1 to 4, a preferred embodiment is shown, in which the entire antenna is connected to a connection section 10 for connecting an antenna circuit of a set of communication equipment (such as a mobile phone) to a floor and a signal receiving and transmitting top antenna. Section 20, both of which are made of copper.

In the preferred embodiment, the bottom connection section 10 is an insert connection section 11, but is not limited thereto, and any of a variety of connection structures can be used. 5 shows another preferred embodiment of the present invention, where the connection section may be a threaded connection section 12.

The present invention mainly makes the antenna section 20 into a cubic structure, and the antenna section 20 includes a hollow column 21 having a set length L, and the hollow column 21 has a specific length (FIG. 1). And axially extending slits 22, 23, as shown in FIG. 4, extending near the bottom end of the column from the outer periphery towards the center of the hollow column, the axially extending slits 22, 23. A transversely extending slit 24 is provided which is in communication with. Thus, the long section 25 having the same length as the set length L and the short section 26 having the shorter length l are formed on the hollow column 21 (as shown in FIG. 3). ).

In the above-described structure, the present invention may have a long section 25 having a set length "L" as the high frequency section 1800MHZ and a long section 25 and a short section 25 as the low frequency receiving and originating area 900MHZ. ) May have an overall length "L + l".

On the other hand, in the illustrated embodiment, the hollow column 21 has a central hole 27 of a set size, assuming two central columns 21, the same in terms of their size, but the central hole 27 is They have different sizes, which can achieve different wall thicknesses T. That is, if one hollow column 21 is drilled to have a larger center hole 27, the thickness T becomes thinner. In contrast, if one hollow column 21 is drilled to have a smaller central hole 27, the thickness T becomes thicker. As such, such antennas are suitable for various bands.

As shown in FIG. 6, the antenna section 20 of the present invention may have an insulating skin layer 30 formed by injection molding (such as plastic) in order to be assembled on a set of communication equipment.

When the present invention is tested with the above-described antenna structure, a waveform as shown in FIG. 7 can be seen, wherein the standing wave ratio (VSWR) is 1.653 at 880MHZ, 1.591 at 960MHZ, 1.819 at 1710MHZ, and 1.045 at 1990 MHZ, These standing waves are all less than two, so they are ideal.

 8 and 9 are diagrams of the radiation field of 960MHZ and diagram of the radiation field of 1800MHZ, respectively, where FIG. 8A shows the E plane, FIG. 8B shows the H plane, and FIGS. 8A and 9A It is the E plane (yz plane) and shows Fig. 8B and 9B H plane (xy plane).

As shown in FIGS. 8A and 8B, it can be seen that the E plane of 960MHZ has a maximum gain of 3.17dBi, while the H plane has a maximum gain of 2.15dBi. These are very excellent.

9A and 9B, it can be seen that the E plane of 1800MHZ has a maximum gain of 3.33dBi, while the H plane has a maximum gain of 3.04dBi. These are very excellent.

 For one reason that cubic materials can be processed at the factory, the present invention allows the factory to make a very good cubic multi-frequency microstrip antenna, which reduces work time and costs, and improves reception and transmission quality.

Preferred embodiments of the present invention described above are only for describing the present invention. It will be apparent to those skilled in the art that various improvements or modifications may be made in each component of the present invention without departing from the spirit of the present invention. For example, the hollow column may extend straight into the planar form. Accordingly, all such modifications and variations are also to be considered as forming part of the present invention within the scope of the appended claims.

1 is a perspective view of a preferred embodiment of the present invention.

2 is a front view of FIG. 1;

3 is a side view of FIG. 2;

4 is a cross-sectional view taken along the line 4-4 of FIG.

5 is a perspective view of another preferred embodiment of the present invention.

6 is a schematic view showing an embodiment of the present invention as shown in FIG. 1 with an outer skin layer.

FIG. 7 is a standing wave ratio test graph of FIG. 1. FIG.

FIG. 8 is a diagram of a radiation field of 960MHZ of the embodiment of FIG. 1;

8A illustrates the E plane,

8B shows an H plane.

FIG. 9 is a diagram of a radiation field of 1800MHZ of the embodiment of FIG. 1;

9A illustrates the E plane,

9B shows an H plane.

 Explanation of symbols on main parts of drawing

10 connection section 11 insertion section

20 antenna section 21 hollow column

22, 23: axially extending slit 27: center hole

Claims (6)

 A cubic microstrip antenna comprising a connecting section and a signal receiving and transmitting antenna section for connecting an antenna circuit of a set of communication equipment, The antenna section comprises a hollow column having a set length, The hollow column is provided with an axially extending slit with a specific length and near the bottom end of the column is provided with a transversely extending slit extending from the outer periphery towards the center of the hollow column and in communication with the axially extending slit. A cubic microstrip antenna having a long section having a length equal to the set length and a short section having a shorter length are formed on the hollow column. 2. The hollow column of claim 1, wherein the hollow column is drilled to have a larger center hole to have a thinner wall thickness, or drilled to have a smaller center hole to have a thicker wall thickness to accommodate various zones. Cubic microstrip antenna.  The cubic microstrip antenna of claim 1 wherein the antenna section has an insulating sheath layer formed by injection molding.  The cubic microstrip antenna of claim 1, wherein the connection section is an insert connection section.  The cubic microstrip antenna of claim 1, wherein the connection section is a threaded connection section.  The cubic microstrip antenna of claim 1, wherein the hollow column extends in a planar shape.