KR20090124044A - Pattern antenna supporting add-on service for mobile telephone and mobile telephone using the same - Google Patents

Abstract

PURPOSE: An internal pattern antenna for a mobile communication terminal and a mobile communication terminal using the same are provided to improve the design degree of freedom of a mobile communication terminal by supporting various additional services without a separate external antenna. CONSTITUTION: A first antenna pattern part(110) has a feeding terminal and a ground terminal. The feeding terminal is fed through a feeding line from a main board of a mobile communication terminal. The ground terminal is grounded to a ground part of the mobile communication terminal through a ground line. A second antenna pattern part(120) supports a frequency band different from a frequency band of the first antenna pattern part, and has a pattern antenna configuration of PIFA(Planar Inverted-F Antenna) type. The first antenna pattern part is fixed to a first surface of an antenna carrier part(130). The second antenna pattern part is fixed to a second surface of the antenna carrier part.

Description

Built-in pattern antenna for mobile communication terminal supporting additional service and mobile communication terminal using same {PATTERN ANTENNA SUPPORTING ADD-ON SERVICE FOR MOBILE TELEPHONE AND MOBILE TELEPHONE USING THE SAME}

The present invention relates to an internal antenna of a mobile communication terminal, and more particularly, to an internal antenna that can be mounted in an internal space of a narrow terminal, and to a frequency band of various additional services supported by the mobile communication terminal without a separate external antenna. The present invention relates to a built-in printed circuit board pattern antenna for a mobile communication terminal that can be supported by one built-in antenna.

The development of antenna technology may also be an important factor in the slimming and miniaturization of mobile communication terminals and portable digital TV (eg, DMB, DVB-H, MediaFlo) terminals, which are becoming more common.

For example, the conventional first generation mobile communication terminals are equipped with a stud type antenna, and have a protruding exterior at one side of the upper end of the mobile communication terminal, which is inconvenient to carry and has a high risk of damage. There was a problem that the degree of freedom of design which greatly affects the commerciality was limited. In recent years, however, an intena type has been generally adopted in which an antenna is mounted in a housing of a terminal and a protruding antenna is not exposed in appearance.

In addition, most recent terminals have to accommodate two or three or more bands. For example, in the case of a mobile communication terminal that complies with the Wide-band Code Division Multiple Access (WCDMA) technology of the 3GPP standard, which is widely used worldwide as a representative of the third generation mobile communication, in most cases, the GSM frequency band ( 860 to 960 MHz), Universal Mobile Telecommnunications System (UMTS) band (1,920 to 2,170 MHz), and additionally, Global Positioning System (DCS) band (1,710 to 1,880 MHz) and PCS (Personal Communication Service) band (1,880 to 1,990) MHz) shall be supported. In other words, even in the case of the built-in antenna, there is a need to have excellent radiation characteristics and wide bandwidth even in a small volume to meet the design trend of slim and miniaturized mobile communication terminals.

Moreover, recent terminals support various additional services. For example, it supports additional services such as GPS, Bluetooth, terrestrial or satellite digital multimedia broadcasting (DMB), and recently supports Radio Frequecny Identifiaction (RFID) functions such as Near Field Communication (NFC). Even the trend is becoming common.

On the other hand, since these various additional services overlap each other or use different frequency bands, there is a problem in that a separate antenna corresponding to a frequency band separate from the aforementioned internal antenna of the terminal exists. In order to solve this problem, there is a method using a wide band antenna, but it is difficult to obtain a wide band characteristic evenly covering all frequency bands with a single antenna, and the reception sensitivity is deteriorated in a frequency band corresponding to one additional service. Follow.

Therefore, as an alternative to this, a method of connecting an external antenna corresponding to each of the additional services to an external antenna RF connector of a terminal is used, but this also causes inconvenience of loss and loss of the external antenna. In addition, when a force is applied in a state in which an external antenna is attached to the terminal, there is a problem in that the service cost increases due to a high risk of damage.

In order to solve this problem, it is preferable to use an internal antenna that is mounted inside the terminal also for the antenna for additional service. However, in the case of the antenna mounted inside the terminal, not only the antenna space that can be mounted in the mobile communication terminal is gradually narrowing, but also there are components that may cause metal components and noise around the antenna. There are RF constraints that must not be present, which present a significant limitation in the design of the terminal.

An object of the present invention for solving the above problems is, as a built-in antenna that can be mounted in the internal space of a narrow terminal, a single built-in without a separate external antenna frequency band of various additional services supported by the mobile communication terminal It is to provide a built-in antenna for a mobile communication terminal that can be supported by the antenna.

Another object of the present invention for solving the above problems, a mobile communication terminal having a built-in antenna for supporting the frequency bands of various additional services supported by the mobile communication terminal without a separate external antenna with one built-in antenna To provide.

In order to achieve the above object, the present invention provides a built-in antenna for use in a mobile communication terminal, the power supply terminal being fed through a power supply line from a main board of the mobile communication terminal, and grounded through a ground line to the ground of the mobile communication terminal. A first antenna pattern portion having a ground terminal; A second antenna pattern unit having a feed terminal fed from a main board of the mobile communication terminal through a feed line, and supporting a different frequency band from that of the first antenna pattern unit; And an antenna carrier part to which the first antenna pattern part and the second antenna pattern part are fixed.

Here, the second antenna pattern portion is characterized by having a planar inverted-F antenna (PIFA) type pattern antenna configuration, the ground terminal which is grounded through the ground line to the ground of the mobile communication terminal It may be configured to further include.

Here, the first antenna pattern portion may be fixed to the first surface of the antenna carrier portion, and the second antenna pattern portion may be configured to be fixed to the second surface of the antenna carrier portion instead of the first surface.

Here, the first antenna pattern portion and the second antenna pattern portion may be fixed on the same surface of the antenna carrier portion, the second antenna pattern portion may be configured to be fixed to the side of the position where the first antenna pattern portion is fixed. .

Here, the first antenna pattern portion and the second antenna pattern portion may be formed of a conductive metal material or a printed circuit board pattern.

Here, one of the first antenna pattern portion and the second antenna pattern portion may be a global positioning system (GPS), digital multimedia broadcasting (DMB), Bluetooth, and radio frequency identification (RFID) frequency bands. It may be configured to support at least one frequency band.

The first antenna pattern part and the second antenna pattern part may be fixed to the antenna carrier part by a heat fusion method.

In accordance with another aspect of the present invention, there is provided a mobile communication terminal having a built-in antenna as described above, wherein an RF connector unit is connected to an external antenna separate from the internal antenna, and the external antenna is connected through the RF connector unit. And a switching unit for selectively switching the second antenna pattern unit of the built-in antenna and connecting the internal antenna to an internal circuit.

The switching unit may include a switch exposed to the outside of the mobile communication terminal, and the switch may be manipulated by a user to selectively select the external antenna and the second antenna pattern unit of the internal antenna connected through the RF connector. Switch to an internal circuit.

Here, the switching unit may be configured to selectively switch the antenna having a high reception sensitivity by connecting the second antenna pattern portion of the built-in antenna and the reception sensitivity of the external antenna to connect to the internal circuit.

Herein, the switching unit detects that the external antenna is connected to the RF connector, and when the external antenna is connected to the RF connector, connects the external antenna to an internal circuit, and the external antenna is connected to the RF connector. If not connected to the second antenna pattern portion of the built-in antenna may be configured to connect to the internal circuit.

When using a built-in antenna for a mobile communication terminal according to the present invention as described above, the additional service as a built-in antenna instead of having to carry a separate external service for the external antenna for the user carry and use it when necessary combined with the mobile communication terminal Since the frequency band corresponding to can be supported, inconvenience in carrying an external antenna can be eliminated.

In particular, it is possible to support various additional services without the use of an external antenna that protrudes outwards, thereby increasing the freedom of design of the mobile communication terminal, and reducing the manufacturing cost of the mobile communication terminal by employing a single internal antenna. It can bring the effect.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing the drawings, similar reference numerals are used for similar elements.

Terms such as first, second, A, and B may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. The term and / or includes a combination of a plurality of related items or any item of a plurality of related items.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a conceptual diagram illustrating a configuration example of a built-in antenna for a mobile communication terminal according to the present invention.

Referring to FIG. 1, an example 100 of a built-in antenna for a mobile communication terminal according to the present invention includes a first antenna pattern part 110, a second antenna pattern part 120, and a first and second antenna pattern part 110. , 120 may be configured to include an antenna carrier 130 is fixed.

The first antenna pattern unit 110 includes a feed terminal 111 that is fed from a main board of the mobile communication terminal through a feed line, and a ground terminal 112 that is grounded through a ground line in the ground of the mobile communication terminal. Can be configured.

The first antenna pattern unit 110 is generally composed of a wide band antenna covering two to three frequency bands, adopting a double resonance structure, GSM frequency band (860 ~ 960MHz), UMTS (Universal Mobile Telecommnunications System) band It can be configured as a broadband antenna covering (1,920 ~ 2,170MHz) and PCS (Personal Communication Service) band (1880 ~ 1990MHz). That is, the first antenna pattern portion may be a broadband antenna pattern portion for a communication service provided in a conventional built-in antenna for a mobile communication terminal. Typically, the first antenna pattern part has an antenna configuration of a planar inverted-F antenna (PIFA) type and includes a feed terminal 111 and a ground terminal 112.

Next, the second antenna pattern unit 120 includes a feed terminal 121 that feeds through a feed line from the main board of the mobile communication terminal, and supports a frequency band different from that of the first antenna pattern unit. Antenna pattern part.

The second antenna pattern portion 120 may be configured as a monopole type, and like the first antenna pattern portion 110, may have a PIFA type configuration, in which case the ground portion of the mobile communication terminal and It may further have a ground terminal to be connected. 1 illustrates a configuration in which the second antenna pattern unit 120 is configured in a monopole type and has a power supply terminal 121 without a ground terminal.

For example, the frequency band supported by the second antenna pattern unit 120 is at least one of GPS, Digital Multimedia Broadcasting (DMB), Bluetooth, and Radio Frequency Identification (RFID) frequency bands. It may be a frequency band for supplementary services, where support is increasing in communications terminals.

Lastly, the antenna carrier part 130 is a component to which the first antenna pattern part 110 and the second antenna pattern part 120 are fixed. Preferably, the antenna carrier 130 may be manufactured using a material having a high dielectric constant as much as possible to reduce the volume of the entire internal antenna. For example, the antenna carrier 130 may be formed of a synthetic resin material such as poly-carbonate (PC), such as by injection molding. That is, the antenna carrier unit 130 is installed to be spaced apart from the printed circuit board mounted inside the terminal with the first and second antenna pattern units 110 and 120 fixed to the first and second antenna patterns. Support the parts (110, 120).

On the other hand, the first antenna pattern portion 110 and the second antenna pattern portion 120 to facilitate the manufacture of the antenna pattern, to reduce the deviation between the antenna pattern by the mass production printed circuit board (PCB: Printed It is preferably composed of a pattern antenna printed on a circuit board.

However, the first antenna pattern portion 110 and the second antenna pattern portion 120 may be made of a conductive metal material. In this case, the first antenna pattern portion 110 and the second antenna pattern portion 120 may be formed. The antenna pattern parts 110 and 120 are fixed to the antenna carrier part 130 by a heat fusion method, or a plurality of fastening holes that may be coupled to the fastening protrusions and form a plurality of fastening protrusions on the antenna carry part 130. It can be formed in the fastening protrusion and the fastening hole by the coupling.

However, since the first antenna pattern portion and the second antenna pattern portion may not be thermally fused as the pattern antenna printed on the printed circuit board, the first and second antenna pattern portions may be formed of a metal material. It may have an advantage of reducing the occurrence of characteristic deviation that may be generated by the process. In addition, by forming a pattern by a printed circuit board process as described above may have the advantage that the deviation between the antenna pattern can be reduced.

A distinctive feature of the built-in antenna for a mobile communication terminal according to the present invention illustrated in FIG. 1 is that, compared to a conventional built-in antenna having one antenna pattern portion on the antenna carrier 130, the antenna carrier 130 ) Is provided with a separate antenna pattern portion 120 for additional services. That is, by additionally fixing the second antenna pattern part 120 for additional service separate from the first antenna pattern part 110 to the antenna carrier part 130, the additional service can be provided using only the internal antenna without using an external antenna. It can be supported.

At this time, instead of reducing the volume of the conventional antenna carrier portion, the antenna carrier portion 130 is formed of a material having a higher dielectric constant, and the first antenna pattern portion 110 is fixed to the upper surface of the antenna carrier portion, and the lower surface of the antenna carrier portion The internal antenna may be configured by fixing two antenna pattern parts to one antenna carrier part in such a manner as to fix the second antenna pattern part 120. Alternatively, on the contrary, the first antenna pattern part 110 may be fixed to the bottom surface of the antenna carrier part, and the second antenna pattern part 120 may be fixed to the top surface of the antenna carrier part.

For example, the volume may be reduced to 1/2 or less as compared with the conventional antenna carrier, and the second antenna pattern part may be fixed in the space to increase the space utilization of the entire internal antenna.

In addition, it may be possible to position the second antenna pattern portion in an area not occupied by the first antenna pattern portion on the same surface on the antenna carrier portion 130. That is, the first antenna pattern portion 110 and the second antenna pattern portion 120 are fixed on the same surface of the antenna carrier portion, the second to the left / right or up / down portion of the first antenna pattern portion 110 The antenna pattern unit 120 may be fixed.

1 illustrates a configuration of a built-in antenna for a mobile communication terminal in which a first antenna pattern portion and a second antenna pattern portion are positioned on the same surface of the antenna carrier 130, but various modifications are possible as described above. 2A and 2B illustrate various modifications of positions where the first and second antenna pattern portions are fixed on the antenna carrier portion.

2A is a conceptual diagram illustrating an embodiment of a built-in antenna for a mobile communication terminal according to the present invention.

Referring to FIG. 2A, as described above, the first antenna pattern portion 110 is fixed to the upper surface of the antenna carrier portion 130, and the second antenna pattern portion 120 is fixed to the lower surface of the antenna carrier portion 130. An embodiment of the form of fixing is illustrated.

2B is a conceptual diagram illustrating another embodiment of the internal antenna for a mobile communication terminal according to the present invention.

Referring to FIG. 2B, as described above, the first antenna pattern portion 110 is fixed to the bottom surface of the antenna carrier portion 130, and the second antenna pattern portion 120 is disposed on the top surface of the antenna carrier portion 130. An embodiment of the form of fixing is illustrated.

3 is a conceptual diagram illustrating a mounting form in a mobile communication terminal of an internal antenna for a mobile communication terminal according to the present invention.

In FIG. 3, a cross-sectional configuration of a sliding type mobile communication terminal is illustrated, and a structure in which a built-in antenna 310 for a mobile communication terminal according to the present invention is mounted in a slide type mobile communication terminal 300 is illustrated. Is illustrated.

The mobile communication terminal 300 includes a main body 310 and a sliding part 320 mounted with a display screen sliding up and down on one side of the main body, and the sliding part 320 is the main body 310. In the case of sliding upward in the upward direction (downward in FIG. 3), the keypad is exposed and operation such as a telephone call is possible, and the sliding part 320 is downward in the main body 310 ( In the case of sliding and closing in the upward direction of FIG. 3, the keypad is covered.

The main body 310 of the mobile communication terminal 300 is a main printed circuit board 311 of the mobile communication terminal, a keypad printed circuit board 313 composed of another printed circuit board, the main printed circuit board 311 and the keypad It consists of a bracket 312 of a metal material (typically magnesium-magnesium material is available) interposed between the printed circuit board 313, and a housing 314 constituting an external appearance of the mobile communication terminal.

At this time, the antenna 330 for the mobile communication terminal according to the present invention is positioned apart from the main printed circuit board 311, the feed terminal of the first antenna pattern portion and the second antenna pattern portion of the antenna 330 for the mobile communication terminal And a ground terminal connected to the main printed circuit board.

Mobile communication terminal using built-in antenna according to the present invention

4 is a block diagram showing an embodiment of a mobile communication terminal using a built-in antenna according to the present invention.

In the case of a mobile communication terminal, it is also possible to use only an internal antenna according to the present invention without connecting a separate external antenna, but using diversity or a separate external antenna or earphone antenna according to the present invention. As a concept of selective switching, a configuration using an antenna may be possible.

Referring to FIG. 4, the mobile communication terminal 400 having the built-in antenna 410 according to the present invention includes an RF connector 430 connected to the built-in antenna and an external antenna 420 separate from the built-in antenna. The switch 440 may be configured to selectively switch the external antenna 420 connected to the second antenna pattern part 412 and the RF connector part of the antenna 410 to an internal circuit.

In particular, as illustrated in FIG. 1, it is seen that the second antenna pattern portion 412 instead of the first antenna pattern portion 411 for a typical mobile communication service is integrated with an internal antenna by replacing a separate external antenna. Since the built-in antenna according to the present invention, when the additional additional service external antenna is connected to the mobile communication terminal, it may be preferable to selectively switch the second antenna pattern unit 412 and the external service external antenna 420.

In this case, the switching unit includes a switch exposed to the outside of the mobile communication terminal 400, and is connected to the second antenna pattern portion 412 of the built-in antenna 410 and the RF connector by a user's switch operation. The external antenna 420 may be selectively switched to be connected to an internal circuit (RF receiving circuit) 450.

Alternatively, the switching unit selectively selects the second antenna pattern unit 412 and the external antenna 420 of the internal antenna 410 according to a setting value that can be set in a predetermined menu structure of the mobile terminal user interface instead of the externally exposed switch. Can be used to

Alternatively, the switching unit may be configured to perform a diversity operation of selecting an appropriate antenna according to a situation according to reception sensitivity values of the two antennas 412 and 420. For example, the switching unit may be configured to compare the reception sensitivity of the internal antenna and the external antenna to selectively switch the antenna having a high reception sensitivity to connect to the internal circuit.

Finally, the switching unit detects that the external antenna 420 is connected to the RF connector unit 430, and when the external antenna 420 is connected to the RF connector unit 430, the external antenna 420 is connected to the internal circuit 450. If the external antenna 420 is not connected to the RF connector 430, the second antenna pattern portion 412 of the internal antenna 410 may be connected to the internal circuit 450. .

That is, when the user fastens the external antenna to the RF connector, the external antenna can be automatically used. This is because the reception sensitivity of the external antenna may be higher than that of the second antenna pattern portion 412 of the internal antenna 410.

The switching unit may be configured by using an RF switch controlled by a processor unit (eg, an MSM-Mobile Station Modem chip) provided in the mobile communication terminal. For example, when the MSM chip controls the switching unit 440, the MSM chip may be configured to control the switching unit 440 using a signal through a general purpose input / output (GPIO) pin.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

1 is a conceptual diagram illustrating a configuration example of a built-in antenna for a mobile communication terminal according to the present invention.

2A is a conceptual diagram illustrating an embodiment of a built-in antenna for a mobile communication terminal according to the present invention.

2B is a conceptual diagram illustrating another embodiment of the internal antenna for a mobile communication terminal according to the present invention.

3 is a conceptual diagram illustrating a mounting form in a mobile communication terminal of an internal antenna for a mobile communication terminal according to the present invention.

4 is a block diagram showing an embodiment of a mobile communication terminal using a built-in antenna according to the present invention.

<Description of the reference numerals for the main parts of the drawings>

110: first antenna pattern portion 120: second antenna pattern portion

111, 121: Feeding terminal 122: Grounding terminal

130: antenna carrier

Claims (12)

In the built-in antenna used in the mobile communication terminal, A first antenna pattern unit including a power supply terminal supplied from a main board of the mobile communication terminal through a power supply line, and a ground terminal grounded through a ground line to a ground portion of the mobile communication terminal; A second antenna pattern unit having a feed terminal fed from a main board of the mobile communication terminal through a feed line, and supporting a different frequency band from that of the first antenna pattern unit; And And a first antenna pattern portion and an antenna carrier portion to which the second antenna pattern portion is fixed. The method of claim 1, The second antenna pattern part has a planar inverted-F antenna (PIFA) type pattern antenna configuration, and adds a ground terminal grounded through a ground line to the ground of the mobile communication terminal. Built-in antenna for a mobile communication terminal, characterized in that provided with. The method of claim 1, The first antenna pattern portion is fixed to the first surface of the antenna carrier portion, and the second antenna pattern portion is fixed to a second surface of the antenna carrier portion, not the first surface, the built-in antenna for the mobile communication terminal . The method of claim 1, The first and second antenna pattern parts are fixed on the same surface of the antenna carrier part, and the second antenna pattern part is fixed to the side of the position where the first antenna pattern part is fixed. Built-in antenna for The method of claim 1, And the first antenna pattern portion and the second antenna pattern portion are made of a conductive metal material or a printed circuit board pattern. The method of claim 1, One of the first antenna pattern unit and the second antenna pattern unit supports at least one frequency band of GPS, Digital Multimedia Broadcasting (DMB), Bluetooth, and Radio Frequency Identification (RFID) frequency bands. Built-in antenna for a mobile communication terminal, characterized in that. The method of claim 1, And the first antenna pattern part and the second antenna pattern part are fixed to the antenna carrier part by a heat fusion method. A mobile communication terminal having a built-in antenna for a mobile communication terminal according to claim 1. The method of claim 8, An RF connector unit to which an external antenna separate from the internal antenna is connected; And a switching unit for selectively switching the external antenna connected through the RF connector unit and the second antenna pattern unit of the internal antenna to connect to an internal circuit. The method of claim 8, The switching unit includes a switch exposed to the outside of the mobile communication terminal, the switch is manipulated by a user to selectively switch the second antenna pattern portion of the external antenna and the internal antenna connected through the RF connector; A mobile communication terminal characterized in that connected to the internal circuit. The method of claim 8, The switching unit compares the reception sensitivity of the second antenna pattern portion of the internal antenna and the external antenna to selectively switch the antenna having a high reception sensitivity to connect to the internal circuit. The method of claim 8, The switching unit detects that the external antenna is connected to the RF connector, and when the external antenna is connected to the RF connector, connects the external antenna to an internal circuit, and the external antenna is not connected to the RF connector. Otherwise, the second antenna pattern part of the built-in antenna is connected to an internal circuit.

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