KR200322363Y1 - Small dielectric antenna - Google Patents

Abstract

The present invention relates to a small dielectric antenna, comprising: a ceramic dielectric (11) made of a ceramic material serving as a first dielectric; A first metal pattern 12 formed on a bottom surface of the ceramic dielectric 11; A PCB dielectric 14 in which a mounting portion 13 on which a ceramic dielectric 11 is mounted is protruded integrally at one corner thereof and utilizing a portion of the PCB 20 as a second dielectric; A second metal pattern 15 formed on an upper surface of the mounting portion 13 of the PCB dielectric 14 to be in contact with the first metal pattern 12; A third metal pattern 16 formed on the lower surface of the mounting portion 13 of the PCB dielectric 14; A connection metal pattern 17 for connecting through the second and third metal patterns 15 and 16 formed on upper and lower surfaces of the mounting portion 13 of the PCB dielectric 14; And a power feeding metal pattern 18 formed on the PCB 20 to be electrically connected to the second metal pattern 15. Therefore, the present invention, by forming a metal pattern only on the lower side of the ceramic dielectric, it is easy to form a metal pattern on the ceramic dielectric to simplify the manufacturing process, and the metal patterns are located on one side edge of the PCB dielectric to the various parts on the PCB Minimize the effects of the resonance to prevent the resonant frequency is changed, as well as enough space for mounting components with different functions on the PCB to effectively use the area of the PCB dielectric to help the overall system design It has the effect that can be used in a plurality of bands by having a plurality of radiation electrodes that cause resonance in two or more bands.

Description

Small dielectric antenna {SMALL DIELECTRIC ANTENNA}

The present invention relates to a small dielectric antenna, and more particularly, it is easy to form a metal pattern on the ceramic dielectric, and the manufacturing process is simple, minimizing the influence of various components on the PCB and efficiently reducing the PCB dielectric area. A small dielectric antenna that can be used.

In general, an antenna for a mobile communication service receives a radio wave from an antenna attached to a base station, a repeater, or a wireless communication device, or transmits an electric signal generated in the communication device to the outside.

A representative example of the antenna is a monopole antenna, which is a type of retractable antenna that can be pulled out of the antenna for a long time. The length of the monopole antenna is about 1/4 of the wavelength.

Nowadays, stubby antennas are used because they do not need to be pulled out or inserted into the antenna due to the inconvenience of monopole antennas, and stevie antennas include dielectric antennas such as helical antennas, whip antennas, or chip antennas. Can be mentioned.

Dielectric antennas are being reduced in size by using meander lines in accordance with the trend of miniaturization of antennas. In particular, dielectric antennas are being further miniaturized by using small rectangular parallelepiped dielectrics made of ceramics. PCS, IMT-2000, PCS and Bluetoooth To solve different bands in one module, they have broadband characteristics.

Referring to the small dielectric antenna of the conventional stubby antenna with the accompanying drawings as follows.

1 is an exploded perspective view showing a small dielectric antenna according to the prior art. As shown, the conventional small dielectric antenna has a ceramic dielectric material 1 of ceramic material acting as a first dielectric material and a first metal pattern 2 formed in a meander shape on the surface of the ceramic dielectric material 1. A first dielectric metal pattern 3 formed on one surface of a ceramic dielectric, a PCB dielectric 5 using a portion of a printed circuit board 4 on which the ceramic dielectric 1 is mounted, as a second dielectric, a PCB A second metal pattern 6 formed on the front and back sides of the dielectric 5, a connection metal pattern 7 connecting through the second metal pattern 6 formed on the front and back sides of the PCB dielectric 5, and And a second feeding metal pattern 8 formed on the PCB 4 to be electrically connected to the first feeding metal pattern 3.

The operation of a conventional small dielectric antenna having such a structure is performed as follows.

Using a connector or shorting the signal line (not shown) supplied directly from the RF module and the metal pattern (8) for the second power supply so that the current flows.

Currents transmitted through the metal pattern 8 for the second feed and the metal pattern 3 for the first feed are formed in a meander line shape formed on the upper and lower surfaces of the ceramic dielectric 1 and the PCB 4 of the antenna. It flows through the second metal patterns 2 and 6 and radiates the maximum electromagnetic energy into the atmosphere at an appropriate resonance frequency.

However, in the conventional small dielectric antenna, since the first metal pattern 2 has the shape of a meander line and exists on the surface or the inside of the ceramic dielectric 1, the manufacturing process is complicated, resulting in manufacturing difficulties. Since the positions of the first and second metal patterns 2 and 6 are located at the center of the PCB 4, they are affected by various components installed on the PCB 4, and the resonance frequency is changed as well as the PCB ( 4) It was difficult to secure a space for mounting components having different functions on the top, which caused a lot of restrictions on the overall system design.

The present invention is to solve the above-described problems, the object of the present invention is to form a metal pattern only on the lower side of the ceramic dielectric, it is easy to form a metal pattern on the ceramic dielectric, the manufacturing process is simplified, the metal patterns are PCB Positioned at one edge of the dielectric minimizes the influence of various components on the PCB to prevent the resonant frequency from changing and also secures enough space to mount components with different functions on the PCB. The present invention provides a small dielectric antenna that can be used in a plurality of bands by providing a large number of radiation electrodes that generate resonance in two or more bands because the area can be efficiently used.

The present invention for realizing the above object is a small dielectric antenna, comprising: a ceramic dielectric of ceramic material serving as a first dielectric; A first metal pattern formed on the bottom surface of the ceramic dielectric material; A PCB dielectric in which a ceramic dielectric is mounted on the upper side and integrally formed at one corner thereof, and using a part of the PCB as a second dielectric; A second metal pattern formed on an upper surface of the mounting portion of the PCB dielectric to contact the first metal pattern; A third metal pattern formed on a lower side of the mounting portion of the PCB dielectric; A connection metal pattern for connecting through the second and third metal patterns formed on the upper and lower surfaces of the mounting portion of the PCB dielectric; And a power feeding metal pattern formed on the PCB to be electrically connected to the second metal pattern.

1 is an exploded perspective view showing a small dielectric antenna according to the prior art,

2 is an exploded perspective view showing a small dielectric antenna according to an embodiment of the present invention,

3 is a development view illustrating a first metal pattern of a small dielectric antenna according to an embodiment of the present invention,

4 is a development view illustrating second and third metal patterns of a small dielectric antenna according to an embodiment of the present invention;

Figure 5 is a graph showing the actual measurement value for the return loss of the small dielectric antenna according to an embodiment of the present invention compared to the conventional,

6 is a development view showing a first metal pattern of a small dielectric antenna according to another embodiment of the present invention,

7 is an exploded view showing second and third metal patterns of a small dielectric antenna according to another embodiment of the present invention,

8 is a graph showing the calculated value of the return loss of the small dielectric antenna according to another embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

11 ceramic dielectric 12, 31 first metal pattern

13 mounting part 14 PCB dielectric

15, 32: second metal pattern 16, 33: third metal pattern

17, 34: metal pattern for connection 18: metal pattern for feed

Hereinafter, with reference to the accompanying drawings, the most preferred embodiment of the present invention will be described in more detail so that those skilled in the art can easily practice.

2 is an exploded perspective view showing a small dielectric antenna according to an embodiment of the present invention, Figure 3 is an exploded view showing a first metal pattern of a small dielectric antenna according to an embodiment of the present invention, Figure 4 2 and 3 are exploded views showing the second and third metal patterns of the small dielectric antenna according to an embodiment of the present invention, and FIG. 5 is a diagram illustrating actual measurement values of the return loss of the small dielectric antenna according to an embodiment of the present invention. 6 is an exploded view showing a first metal pattern of a small dielectric antenna according to another embodiment of the present invention, and FIG. 7 is a second and third metal of the small dielectric antenna according to another embodiment of the present invention. FIG. 8 is a development view showing a pattern, and FIG. 8 is a graph illustrating measured values of return loss of a small dielectric antenna according to another exemplary embodiment of the present invention.

As shown, in the small dielectric antenna 10 according to the embodiment of the present invention, the ceramic dielectric 11 serving as the first dielectric and the first metal pattern formed on the lower surface of the ceramic dielectric 11 ( 12 and the PCB dielectric 14 having the mounting portion 13 on which the ceramic dielectric 11 is mounted on one side, and the upper and lower surfaces of the mounting portion 13 of the PCB dielectric 14, respectively. The second and third metal patterns 15 and 16 to be formed, the connecting metal pattern 17 through which the second and third metal patterns 15 and 16 are connected to each other, and the second metal pattern 15 are electrically connected to each other. It includes a power supply metal pattern 18 connected to.

The ceramic dielectric material 11 is formed of a ceramic material serving as a first dielectric material, has a rectangular parallelepiped shape, and a first metal pattern 12 is formed on a lower surface thereof.

The first metal pattern 12 is formed on the lower surface of the ceramic dielectric 11 and is electrically connected to the second metal pattern 15.

The PCB dielectric 14 has a mounting portion 13 on which the ceramic dielectric 11 is mounted to protrude horizontally at one corner thereof, and uses a part of the PCB (Printed Circuit Board) 20 as the second dielectric.

The PCB 20 has upper and lower ground metal conductors 21 and 22 formed thereon, and the grounding metal conductors 21 and 22 are formed through a metal pattern 23 formed of via holes. It is electrically connected to each other and is not electrically shorted with the first to third metal patterns 12, 15, and 16.

The second metal pattern 15 is formed on the upper surface of the mounting portion 13 of the PCB dielectric 14 to be in contact with the first metal pattern 12 and in the via hole penetrating the mounting portion 13. The connection metal pattern 17 formed on the side surface is electrically connected to the third metal pattern 16 formed on the lower surface of the mounting portion 13 of the PCB dielectric 14.

The power feeding metal pattern 18 is formed on the PCB 20 to be electrically connected to the second metal pattern 15.

A small dielectric antenna according to another embodiment of the present invention has a structure that can be used in a plurality of bands, and for this purpose, a ceramic dielectric 11, a PCB dielectric 14 having a mounting portion 13, and The dedicated metal pattern 18 is the same as the above embodiment, but the third metal pattern 33 is fed from the power feeding metal pattern 18 through the second metal pattern 32 and the connecting metal pattern 34. And a plurality of radiation electrodes 33a and 33b to cause resonance in two or more bands.

As shown in Fig. 7, the third metal pattern 33 is composed of two radiation electrodes 33a and 33b in this embodiment.

6 and 7, the first and second metal patterns 31 and 32 are the same as those of the above embodiment, but have a shape corresponding to that of the third metal pattern 33. .

The operation of the small dielectric antenna having such a structure is performed as follows.

The small dielectric antenna according to the present invention has a feeding structure of CPW (Co-Planar Waveguide), which is formed on the PCB dielectric 14 to form the first to third metal patterns 12, 15, 16, 31, 32, and 33. Power is supplied by short-circuit with a short circuit, and a current is generated by short-circuiting the signal line and the power supply metal pattern 18 directly supplied from the connector or the RF module.

Currents transmitted to the metal pattern 18 for power supply are formed on the upper and lower surfaces of the ceramic dielectric 11 and the mounting portion 13 of the PCB dielectric 14. 32, 33) and radiates the maximum electromagnetic energy into the atmosphere at an appropriate resonant frequency.

In addition, in order to reduce the size of the conventional monopole antenna, a small dielectric using second and third metal patterns 15, 16, 32, and 33 formed of meander lines and a ceramic dielectric material 11 having a high relative dielectric constant. The input impedance of the antenna is adjusted by varying the distance, width, length, and properties of the ceramic dielectric 11 and the PCB dielectric 14 between the meander lines of the second and third metal patterns 15, 16, 32, and 33. Can be.

The first metal patterns 12 and 31 may be shorted with the second metal patterns 15 and 32 on the PCB dielectric 14 to fix the ceramic dielectric 11 as well as to increase the electrical length of the antenna.

The physical properties of the ceramic dielectric material 11 and the PCB dielectric material 14, in particular, the relative dielectric constant is different from each other to improve the broadband characteristics.

Since the first metal patterns 12 and 31 are formed only on the lower side of the ceramic dielectric 11, the first metal patterns 12 and 31 of the ceramic dielectric 11 can be easily formed, thereby simplifying the manufacturing process.

FIG. 5 is a graph illustrating actual measurements of return loss of a small dielectric antenna according to an embodiment of the present invention. As shown, even if the first metal pattern 12 is formed only on the lower surface of the ceramic dielectric 11, meander lines on the top, bottom, and side surfaces of the ceramic dielectric 1 (shown in FIG. 1) described in the related art. The first metal conductor 2 (shown in FIG. 1) may have similar reflection loss characteristics.

Since the positions of the first to third metal patterns 12, 15, 16, 31, 32, and 33 are mounted on the mounting part 13 formed by being biased at one edge of the PCB pattern 14, various types of components on the PCB 20 may be provided. Minimize the influence from components (not shown) to prevent the resonance frequency from being lowered, and to secure enough space to mount components having different functions on the PCB 20, thereby providing the area of the PCB dielectric 14 Can be used efficiently, which will greatly aid the overall system design.

Meanwhile, in another embodiment of the present invention, the beginning of the third metal conductor 33 is shorted with the first and second metal conductors 31 and 32, but the ends thereof are not shorted and the nine radiation electrodes 33a, 33b) causes resonance in two different bands.

8 is a graph showing the calculated value of the return loss of the small dielectric antenna according to another embodiment of the present invention. As shown, in the small dielectric antenna according to another embodiment of the present invention, the third metal pattern 33 is connected to the second metal pattern 32 and the second metal pattern 32 from one of the power supply metal patterns 18. As it is fed through, it can be seen that it can be used in the band 1 and the band 2 by the two radiation electrodes (33a, 33b).

As described above, the small dielectric antenna according to the present invention forms a metal pattern only on the lower side of the ceramic dielectric to facilitate the formation of a metal pattern on the ceramic dielectric, thereby simplifying the manufacturing process, and the metal patterns are biased at one edge of the PCB dielectric. Positioning minimizes the influence of various components on the PCB to prevent the resonant frequency from changing and also secures enough space to mount components with different functions on the PCB so that the area of the PCB dielectric can be used efficiently. Therefore, it helps a lot of system design, and it has an effect that can be used in a plurality of bands by providing a plurality of radiation electrodes which cause resonance in two or more bands.

As described above is just one embodiment for implementing a small dielectric antenna according to the present invention, the present invention is not limited to the above embodiment, as claimed in the utility model registration claims below Without departing from the gist, any person having ordinary knowledge in the field to which the present invention belongs will have a technical spirit of the present invention to the extent that various modifications can be made.

Claims (2)

In a small dielectric antenna, A ceramic dielectric of ceramic material serving as a first dielectric; A first metal pattern formed on a bottom surface of the ceramic dielectric material; A PCB dielectric in which the mounting portion on which the ceramic dielectric is mounted is protruded integrally at one corner thereof and utilizing a portion of the PCB as a second dielectric; A second metal pattern formed on an upper surface of a mounting portion of the PCB dielectric to contact the first metal pattern; A third metal pattern formed on a lower surface of a mounting portion of the PCB dielectric; A connection metal pattern for connecting the second and third metal patterns formed on upper and lower surfaces of the mounting portion of the PCB dielectric; And A power feeding metal pattern formed on the PCB to be electrically connected to the second metal pattern; Small dielectric antenna comprising a. The method of claim 1, wherein the third metal pattern is formed of a plurality of radiation electrodes to cause resonance in two or more bands when the power supply from the power supply metal pattern through the second metal pattern and the connecting metal pattern. Small dielectric antenna made.