KR100746257B1 - Broadband Antenna for Mobile Communication - Google Patents

Abstract

The present invention relates to a broadband antenna for mobile communication, and more particularly, to a broadband antenna for mobile communication that can implement a multi-band and broadband characteristics by improving the PCB antenna structure.

In accordance with another aspect of the present invention, a broadband antenna for mobile communication includes a feeder including a feeder for feeding transmission and reception power and a first radiator extending upwardly from an upper end of the feeder, and electrically connected to the feeder. And a PCB on which a second radiator is formed.

Broadband Antenna, Rod Metal, PCB, Conductor Pattern, High Frequency.

Description

Broadband Antenna for Mobile Communication

1 is a perspective view showing the internal structure of a conventional broadband broadband antenna for mobile communication;

2A and 2B are graphs showing a VSWR and a radiation pattern when a conventional broadband mobile communication antenna is applied to a mobile communication terminal;

3 is a perspective view showing the internal structure of a broadband antenna for mobile communication according to an embodiment of the present invention;

4 is an exploded perspective view of a power supply and a PCB shown in FIG. 3;

5 is an electrical equivalent circuit diagram of the antenna of FIG.

6 is a perspective view of a state in which the antenna of FIG. 3 is applied to a mobile communication terminal;

7A and 7B are graphs illustrating a VSWR and a radiation pattern when the antenna of FIG. 3 is applied to a mobile communication terminal.

<Description of the symbols for the main parts of the drawings>

30: feeder 32: first radiator

33a, 33b: projection 34: feeder

40: PCB 42: second radiator

44a, 44b: via hole 50: dielectric

100: antenna 200: mobile communication terminal

The present invention relates to a broadband antenna for mobile communication, and more particularly, to a broadband antenna for mobile communication that can implement a multi-band and broadband characteristics by improving the PCB antenna structure.

The modern digital society is rapidly changing around IT, and mobile communication terminal technology is also developing into an innovative technology-intensive structure.

Mobile terminal manufacturers have been developing multi-band mobile communication terminals that can apply a wide variety of communication methods from all over the world.

It is necessary to develop an antenna applicable to the multi-band mobile communication terminal by riding on the above trend.

1 is a perspective view showing the internal structure of a conventional broadband mobile broadband antenna.

As shown in FIG. 1, a conventional printed circuit board (PCB) fixed antenna includes a metal feeder 11 connecting the antenna 10 and a mobile communication terminal, the feeder 11 and the via hole 14. The PCB 12 is electrically connected through the conductive pattern 13, and the external dielectric 15 surrounding the upper end of the power feeder 11 and the PCB 12 as a whole.

In the antenna 10 configuration, the feeder 11 and the conductor pattern 13 of the PCB 12 contact each other to form a double resonance antenna.

That is, the feeder 11 and the conductor pattern 13 of the PCB 12 are electrically connected by contact to act as one electrical length value, thereby making the λ / 4 resonance in the low frequency band, and collecting the high frequency band. Λ / 4 resonates at to act as a double resonant antenna in the low and high frequency bands.

However, the conventional antenna described above cannot satisfy sufficient band characteristics and radiation performance, as shown in FIGS. 2A and 2B.

In addition, there is a problem that it is difficult to implement a multi-band because there is a limit in the length and width of the conductor pattern by the antenna size.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a broadband antenna for mobile communication, which can realize multi-band and broadband characteristics by a feeder including a second radiator and a first radiator of a PCB. .

Broadband antenna for mobile communication according to an embodiment of the present invention for achieving the above object is provided with a power supply unit for transmitting and receiving power and a first radiator which is formed so as to extend from the upper end of the power supply unit to the upper portion to operate in a high frequency band And a PCB formed with a second radiator electrically connected to the feeder and operating in a low frequency band by electrical coupling with the feeder.

Hereinafter, the configuration and operation of the present invention will be described with reference to the accompanying drawings.

3 is a perspective view showing the internal structure of a mobile broadband antenna according to an embodiment of the present invention, Figure 4 is an exploded perspective view of the power supply and the PCB shown in Figure 3, Figure 5 is an electrical equivalent to the antenna of Figure 3 It is a circuit diagram.

As shown, the antenna according to the embodiment of the present invention comprises a power supply 30 having a first radiator 32, a PCB 40 and a dielectric 50.

The power feeder 30 is a power supply unit 34 connecting the antenna 100 and the mobile communication terminal 200 according to an embodiment of the present invention, and the first protruding portion extending from the upper end of the feeder 34 It comprises a radiator 32 and consists of a metal component.

Protrusions 33a and 33b protruding laterally are formed on one side of the first radiator 32.

By adjusting the length, width and thickness of the first radiator 32, the broadband characteristics of the high frequency band (1.71 GHz to 3.00 GHz) are satisfied and the electrical length value is adjusted according to the frequency.

The PCB 40 has a second radiator 42 having a conductor pattern formed thereon, and via holes 44a and 44b formed at positions corresponding to the protrusions 33a and 33b.

One via hole 44a of the two via holes 44a and 44b is connected to the second radiator 42 to electrically connect the second radiator 42 to the feeder 30, and the other via hole 44b. ) Serves to support the PCB 40 to the feeder 30.

In the drawings, the upper via hole 44a is connected to the second radiator 42. However, the lower via hole 44b may be connected to the second radiator 42 by changing the vertical position.

In addition, although two projections and via holes are illustrated in the drawing, one or more protrusions and via holes, such as one or three, may be configured.

The second radiator 42 is electrically coupled to the feeder 30 including the first radiator 32 to serve as one electrical length value, thereby satisfying radiation characteristics in the low frequency band (800 to 900 MHz).

The electrical length value of the low frequency band is adjusted by changing the contact position of the second radiator 42 and the first radiator 32 of the PCB 40 or the length and shape of the conductor pattern of the second radiator 42.

The dielectric 50 surrounds and protects the power supply 30 and the PCB 40 as a whole.

In FIG. 5, the coil L1 is equivalent to the second radiator 42, and the coil L2 is equivalent to the first radiator 32.

By adjusting the intrinsic length value (λ / 4 in the high frequency band) of the first radiator 32 according to the above configuration, the high-efficiency radiation performance at high frequency can be improved, and the first radiator 32 and the second radiator 32 are improved. By adjusting the electrically coupled length value (λ / 4 in the low frequency band) of the radiator 42, the band characteristic and the radiation performance in the low frequency band can be satisfied.

As a result of measuring the characteristics by applying the antenna 100 according to an embodiment of the present invention as shown in Figure 6 to the mobile communication terminal 200, as shown in Figure 7a and 7b, the low frequency of the conventional dual band antenna It can be seen that and can maintain wider than the narrow bandwidth (FIGS. 2A and 2B) that can cover only one band characteristics, respectively.

Comparing the VSWR of FIG. 7A and FIG. 2A, at the mark 2 (960 MHz), 2.4368 (original invention): 3.1279 (prior art), the mark 3 (1.71 GHz), 2.3152: 4.0712, the mark 4 (1.99 GHz) At 1.4785: 1.9557, mark 5 (2.17 GHz), it can be seen that it is 1.5162: 2.4910, and accordingly, the present invention can be seen that there is little loss in the high frequency band.

Comparing the beam peak value for each frequency in the radiation pattern of Figure 7b and Figure 2b is shown in Table 1 below, as shown in Table 1 it can be seen that the characteristics of the radiation pattern is superior to the prior art.

After all, according to the present invention one antenna can cover the entire low frequency (800MHz ~ 900MHz), high frequency (1.71GHz ~ 3.00GHz) band unlike the conventional fixed antenna.

In particular, when developing a single mobile communication terminal in response to the requirements of the mobile communication terminal manufacturer, sufficient bandwidth characteristics can be applied to implement multi-band characteristics, and thus, existing GSM / DCS / PCS bands and WCDMA (IMT2000). It has not only single band characteristics, but also wide enough to cover all bands, ranging from terrestrial DMB / 2.6GHz satellite DMB.

Embodiments of the present invention are disclosed in the drawings and the detailed description, and the specific terms used above are used only for the purpose of describing the present invention, and are used to limit the scope of the present invention as defined in the meaning or claims. It is not.

Therefore, those skilled in the art can be various modifications and other equivalent embodiments from this, and the true technical protection scope of the present invention should be determined by the technical spirit of the claims.

As described above, according to the present invention, multiband and broadband characteristics may be realized by a feeder including a second radiator and a first radiator of a PCB.

Claims (5)

A feeder provided with a feeder for feeding transmission and receiving power, and a first radiator formed to extend from an upper end of the feeder to an upper portion and operating in a high frequency band; And a PCB electrically connected to the feeder and having a second radiator operating in a low frequency band by electrical coupling with the feeder. The method of claim 1, A first protrusion is formed in the feeder, and a first via hole is formed in the PCB, so that the feeder and the second radiator are electrically connected to each other by inserting the first protrusion into the first via hole. . The method of claim 2, A second protrusion is formed in the feeder, and a second via hole is formed in the PCB so that the PCB is supported by the feeder by inserting the second protrusion into the second via hole. delete delete

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