KR200234974Y1 - Mobile communication broadband antenna - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a small broadband antenna that can be used for mobile communication.

2. The technical problem the invention is trying to solve

The present invention aims to provide a small size and embeddable broadband antenna for mobile communication through a short end of an open end.

3. Summary of solution of design

The present invention comprises a first antenna line for processing the transmission and reception of a mobile communication signal is configured in the form of a closed loop short-circuited open end of the antenna connected from the feeder; And processing the transmission and reception of the mobile communication signal between the power supply unit and the first antenna line, and connecting the power supply unit and the first antenna line to enable the mobile communication signal transmission and reception process of the first antenna line. Includes 2 antenna lines.

4. Important uses of the devise

The present invention is used in mobile communication terminals.

Description

Mobile broadband antenna {MOBILE COMMUNICATION BROADBAND ANTENNA}

The present invention relates to a broadband antenna for mobile communication, and in particular, it is used for mobile communication such as cellular, personal communication system (PCS), personal digital assistant (PDA), IMT-2000 (IMT-2000), and the like. A broadband antenna in the form of a small closed loop is possible.

Mobile communication services such as CD Division (CDMA), Global System for Mobile Telecommunication (GSM) and IMT-2000 (IMT-2000) are steadily evolving and the number of users is increasing day by day. Doing. In addition, mobile communication services for data communication as well as mobile communication services evolved from the existing voice communication continue to emerge and popularize.

In the early days, mobile communication services were focused on voice communication, but based on the changes of the times and the development of technology, consumers' desire to receive more and more diverse services and to receive more various services without distinction between wired and wireless. Was done. In particular, it is hoped that a high-speed, high-capacity multimedia service will be provided through wireless, and various mobile communication services as described above have appeared and evolved as the needs of users.

A feature of generational mobile communication technology is that high-capacity information is delivered at high speed to satisfy various needs of users, and the frequency band used according to these needs is rising to a high frequency band of broadband.

Mobile phones used for mobile communication have continuously changed to reach users efficiently. Mobile phones are developing not only to improve service quality but also to miniaturize, and to meet the changing characteristics of high frequency broadband and to improve service quality, a small but high performance is required.

Currently, two types of antennas used in mobile phone terminals are representative antennas (retractable type antenna, whip antenna) and fixed antenna (fixed type antenna, stubbyantenna).

Although these linear antennas still form the mainstream of mobile communication antennas, they have been an obstacle to miniaturization of communication devices, and also have problems of being inconvenient and fragile due to protruding parts. Accordingly, some companies such as Nokia have recently released mobile phones with built-in antennas, and some companies, such as Murata, have developed and released chip antenna products in accordance with the trend of developing antenna built-in terminals.

In the case of the external whip antenna, a non-bandwidth of about 10 to 15% can be typically implemented. 2 to 5% of a chip antenna which is an internal antenna and 3 to 7 of a patch antenna Compared to%, you can achieve a fairly wide bandwidth. Here, the specific bandwidth means the ratio of the passband and the center frequency (tuning frequency) in the tuning circuit of the receiver.

However, according to the prediction of the technical trend in the future, since the internal antenna is expected to be mainstream from 2003 for the above reason, there is an absolute need for a technology capable of implementing a broadband antenna as an embeddable form.

However, in general, the empirical law of (gain x bandwidth vs. volume) is applied to an antenna, and as a result, when the antenna is miniaturized, its performance necessarily deteriorates.

General built-in antenna technologies such as chip antennas and patch antennas that have been developed so far have narrow bandwidths, such as when the bandwidth is wider than 300 MHz such as the IMT-2000 service. (Actual bandwidth used: 230 ㎒) or as in the United States should implement a wide band, such as when the 'North America-PCS + IMT-2000' service In this case, there was a problem that the application of the built-in antenna is impossible.

Therefore, there is a need for a small but wideband internal antenna that overcomes the narrow bandwidth of the chip antenna or the patch antenna as described above.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a mobile communication antenna of a small size and can be embedded through a short circuit of an open end.

That is, the present invention has a purpose to provide a mobile communication antenna that is small and wideband, can be embedded into the terminal, and surface mount technology (SMT) during production.

1 is a configuration diagram of an embodiment of a broadband antenna for mobile communication according to the present invention.

2a and 2b is another embodiment configuration of a broadband antenna for mobile communication according to the present invention.

Figure 3 is another embodiment configuration for a broadband antenna for mobile communication according to the present invention.

4A and 4B are diagrams illustrating an embodiment of a broadband antenna for mobile communication according to the present invention;

According to an aspect of the present invention, there is provided a mobile communication antenna comprising: a first antenna line configured to have a closed loop form in which an open end of an antenna connected from a power supply unit is short-circuited to process transmission and reception of a mobile communication signal; And processing the transmission and reception of the mobile communication signal between the power supply unit and the first antenna line, and connecting the power supply unit and the first antenna line to enable the mobile communication signal transmission and reception process of the first antenna line. It characterized in that it comprises two antenna lines.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The basic circuit of the broadband antenna for mobile communication according to the present invention is to close the open end of the antenna (short) as shown in Figure 1 to create a closed loop (closed loop) form.

In addition, the antenna according to the present invention is implemented as an antenna by forming a pattern of another type in a closed loop based on the basic circuit described above.

In addition, the antenna according to the present invention is implemented by stacking the above-described antenna in the x, y, z-axis direction.

In addition, the antenna according to the present invention is to implement the above antenna in an internal form and an external form.

1 is a configuration diagram of an embodiment of a broadband antenna for mobile communication according to the present invention.

1 shows a basic circuit of an antenna according to the present invention. This means that the flow of electromagnetic waves from the feeder does not end at the open end, but shorts the open end with one part of the element to form a closed loop.

In general, the linear antenna has a structure in which the end of the lead is opened when the alternating current having a frequency flows along the lead, so that radiation of electromagnetic waves occurs efficiently. It is made into a closed loop shape.

The antenna forms an antenna through a conductor pattern. In the conductor pattern forming the antenna, a broadband antenna is formed by forming a closed loop as described above.

In the present invention, a conductor pattern is formed on a plate-shaped dielectric (ceramic or printed circuit board (PCB)), and the conductor pattern may be formed in a meander line in a planar shape, and via holes. ), Through holes, or the like, may be formed to have a three-dimensional structure. In addition, the basic circuit may be implemented by stacking the basic circuit in the x, y, and z-axis directions according to the purpose and characteristics of the antenna.

Built-in antennas such as chip antennas, which are already on the market, are implemented using a stacked structure. In Fig. 1, the x, y and z axes are shown to show that the above basic circuits can be stacked in this direction. In this way, in the stacking of antennas, the feed points may be the same, and the loops of the antennas may be positioned differently on the same plane. For example, the P-type loop and the b-type loop may be implemented with the same feeding point, or the P-type loop may be stacked to the left. That is, the lamination may be unidirectional, but lamination may be performed with multidirectional characteristics. Of course, it can also be configured to increase the space efficiency while running the feed point.

The stacking type of the antenna may vary depending on the required antenna characteristics, the structure of the terminal, and given conditions.

The antenna according to the present invention shown in FIG. 1 basically forms a closed loop by shorting an open end. This seems to be similar to the existing loop antenna, but the loop antenna is connected to both ends of the element at the feed point, whereas the antenna according to the present invention has an open end such as a plate helical antenna, a chip antenna, and a patch antenna. The end of the antenna having the end is formed by shorting the element.

2A and 2B are diagrams illustrating another embodiment of a broadband antenna for mobile communication according to the present invention.

2A and 2B show a modification of the antenna according to the present invention. The antenna may be implemented in the form of a helical or coil, or may be formed in a spiral shape. In this case, there may be a predetermined difference in the characteristics of the antenna.

2A and 2B show that a suitable characteristic can be found by changing a closed loop of an antenna having a basic shape.

Pitch, width, line width, spacing, etc. can be varied according to the purpose of use and required characteristics of the antenna, and the helical part of FIGS. 2A and 2B may have different characteristics by changing the number of turns or rotations. .

That is, in FIG. 2A, a and b may be varied, and the number of turns, pitch, width, line width, spacing, and the like of C and D may be varied. In FIG. 2B, a 'and b' can be varied, and the number of turns, pitch, width, line width, spacing, etc. of C 'and D' can be varied as in FIG. 2A.

As such, if various variables are changed for the basic antenna, a bandwidth, frequency, etc. may be changed, and a wide band antenna of a desired frequency band may be realized, and a dual band or It can also be implemented with a multi-band antenna such as a triple band.

3 is a configuration diagram of another embodiment of a broadband antenna for mobile communication according to the present invention.

The antenna according to the present invention as shown in Figs. 1 and 2 can be modified as shown in Fig. 3. That is, one antenna that was planarly configured in FIGS. 1 and 2 is shown in FIG. 3 in a three-dimensional manner. Thus, three-dimensional implementation is possible.

In FIG. 3, when the antenna is formed in one plate in the form of a conductor line, the solid line is located at the top of the plate, and the dotted line is located at the bottom of the plate so that the connection between the via hole and the through hole ( through holes) such as through holes formed in the plate.

Also, based on the antenna of FIGS. 1 and 2, a pattern may be implemented inside the antenna, or another pattern may be added on the antenna pattern line. Such a pattern may be implemented in the form of a meander line as described above, and may be implemented in three dimensions by using a via hole, a through hole, or the like.

The modified antenna shown through FIGS. 2A to 3 will be described as follows.

-The shape of the closed loop can be modified. As shown in the loop antenna, various types of closed loops such as triangles, squares, and circles may be implemented.

-It is possible to vary the length of the antenna wire forming the closed loop. In the rectangular closed loop, the length of each side or the size of the square can be varied. The same applies to closed loops of polygons or circles such as triangles and squares.

The antenna line forming the closed loop may be modified as shown in FIG. 2A or 2B to implement all or part of the antenna line in a helical form. In this case, the deformation type may be implemented in various forms such as line width, turns, intervals, widths, gentle bends, and angle bends.

In order to realize a three-dimensional structure in a single antenna, a multi-layered single antenna that connects antenna lines through holes may be implemented.

Other patterns can be implemented or added inside or outside the closed loop.

Another pattern can be added on the antenna pattern line.

-Plate-type dielectrics used in broadband antennas for mobile communication may be PCB (Printed Circuit Board) substrates, ceramic layers, copper, gold-plated copper, Antenna lines, which are implemented as conductors such as silver, silver-palladium, and palladium, may be embodied on a flat surface, such as in the form of meander lines, or via holes. It may be implemented in three dimensions by using a through hole.

Antenna lines can appear in various forms, such as in chip antennas and patch antennas.

-The position of the mobile broadband antenna in the terminal may be based on the same substrate as the internal circuit of the terminal or may be formed on another plate.

In implementing the antenna according to the present invention, the above-described form may be implemented by stacking in the x, y and z axis directions (including both unidirectional and multidirectional).

All these modifications are possible in addition to the various modifications conventionally proposed for the basic circuit of the broadband antenna for mobile communication according to the present invention and various modifications that are commonly accessible, and the 'plate helical antenna' Application No. 10-2000-043460) and the like can be applied.

4A and 4B are diagrams illustrating exemplary embodiments of a broadband antenna for mobile communication according to the present invention.

In FIG. 4A, characteristics of the antenna of FIG. 2A are described.

For the antenna of the type as shown in Figure 2a was measured the reflection characteristics of the antenna according to the frequency from 500MHz to 2500MHz. Based on the case where the standing wave ratio (SWR) of the antenna is 2.5, the band having the standing wave ratio (SWR) of 2.5 or less is 1.055 ㎓ to 1.505 ㎓, which shows the characteristics of the broadband antenna having a specific bandwidth of about 35%. .

In FIG. 4B, characteristics of the antenna of the same type as in FIG. 2B are described.

As shown in FIG. 4A, the standing wave ratio (SWR) is 2.5, and broadband characteristics are shown. However, it can be seen that compared to the characteristic measurement results shown in Figure 4a, which is the characteristics of the antenna according to the antenna mounting position and ground (ground) in the terminal as in the conventional terminal antenna in the antenna according to the present invention This shows the difference. Antenna according to the present invention is a compact, wideband antenna can be configured as an external form as well as the internal form.

The frequency band of cellular communication currently used is 800 MHz to 900 MHz, and the frequency bandwidth of PCS is 1.7 to 1.8 GHz (actual bandwidth 60 MHz). The frequency band of IMT-2000 is 1.9 ~ 2.2GHz, and the actual use band is allocated 230MHz, but the band covered by the antenna is about 1885 ~ 2200MHz (Korea), 1850 ~ 2200MHz (USA: US-PCS included) It should operate in wide band of 300 ~ 400 ㎒. Comparing this with the characteristics of the antenna according to the present invention can be seen that the broadband characteristics of the antenna well, it can be seen that can be utilized in dual mode or triple mode. That is, it can be seen that the antenna according to the present invention can not only cover each area but also simultaneously cover a wireless service using different frequency bands through one antenna.

In addition to the broadband characteristics, the antenna can be used as a multi-band antenna such as a dual band or triple band according to the change of the pattern, and the antennas of the basic type can be modified and stacked so that various mobile communication using different frequency bands can be used. Can be used simultaneously for services.

In addition, since the antenna according to the present invention can be variously changed under a large feature of forming a closed loop by shorting an open end, an antenna having a suitable shape may be utilized according to the purpose of use. At this time, the deformation may appear in various ways as described above.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

The present invention as described above, in the small antenna for mobile communication by short-circuit the open end of the antenna element at any point of the element to form a closed loop to have a wideband characteristics, the effect of using broadband wireless communication There is.

In addition, the present invention, there is an effect that can adjust the antenna characteristics to suit the wireless communication field to be used by modifying the pattern of the antenna to form a closed loop.

In addition, the present invention, the antenna can be implemented in the external as well as the built-in has the effect of simplifying the configuration of the terminal used for mobile communication to the user to use conveniently.

In addition, the present invention, when implemented in a built-in type because it is easy to design as an SM-type (SMD-type: Surface Mount Device-type) has the effect that it is possible to mount the surface using automatic equipment when producing the terminal.

In addition, the present invention can be implemented by stacking the antennas according to the use of the terminal, there is an effect that can effectively match the characteristics required by each terminal.

In addition, the present invention, due to the broadband characteristics and the antenna can be stacked or positioned in a variety of forms by short-circuiting the open end to form a closed loop, depending on the type of communication to be used, such as dual band, triple band, etc. There is an effect that can be used in the band terminal.

Claims (11)

In the antenna for mobile communication, A first antenna line configured to have a closed loop in which an open end of an antenna connected from a feeder is short-circuited to process transmission and reception of a mobile communication signal; And A second process of transmitting and receiving the mobile communication signal between the feeder and the first antenna line and connecting the feeder and the first antenna line to enable the mobile communication signal transmission and reception process of the first antenna line; Antenna track Broadband antenna for mobile communication comprising a. The method of claim 1, The first antenna line and the second antenna line, A broadband antenna for mobile communication, characterized in that it is connected to the circuit of the terminal via the feeder to be used in a mobile communication terminal and formed in a conductor pattern. The method of claim 1, The first antenna line, Broadband antenna for mobile communication, characterized in that to form a closed loop in the form of a circle, polygon, etc. according to the conditions such as the frequency band and bandwidth to be used. The method of claim 1, The first antenna line and the second antenna line, Broadband antenna for mobile communication, characterized in that implemented by modifying the length of the line and the size of the closed loop formed according to the conditions such as the frequency band and bandwidth to be used. The method of claim 1, The first antenna line, Broadband antenna for mobile communication, characterized in that the pattern is implemented inside and outside according to the conditions such as the frequency band and bandwidth to be used. The method of claim 1, The first antenna line and the second antenna line, The broadband antenna for mobile communication, characterized in that by adding another pattern on at least one antenna pattern line in accordance with conditions such as the frequency band and bandwidth to be used. The method of claim 1, The first antenna line and the second antenna line, The broadband antenna for mobile communication, characterized in that the helical form by modifying at least one configuration line according to the conditions such as the frequency band and bandwidth to be used. The method of claim 1, The antenna, And selectively stacking the first antenna line and the second antenna line in x, y, and z-axis directions. The method according to any one of claims 1 to 8, The first antenna line and the second antenna line, Broadband antenna for mobile communication, characterized in that formed on the dielectric plate made of a dielectric, such as ceramic, PCB (Printed Circuit Board). The method of claim 9, The first antenna line and the second antenna line, In forming a pattern on the dielectric plate, a broadband antenna for mobile communication, characterized in that implemented in a planar shape such as a meander line (meander line). The method of claim 9, The first antenna line and the second antenna line, The broadband antenna for mobile communication, characterized in that the three-dimensional implementation by using a via hole (through hole) or through hole (through hole) in the dielectric plate.