KR100620691B1 - Antenna appratus of mobile communication unit - Google Patents

Abstract

The present invention relates to an antenna device of a mobile communication terminal, and relates to an antenna device of a mobile communication terminal provided with a helical antenna and a whip antenna.

The present invention relates to an antenna device of a mobile communication terminal, comprising: a helical antenna, a first feed point part connected to a conductive part of the helical antenna, a whip antenna, and a conductive part of the whip antenna when the whip antenna is pulled out; It characterized in that it comprises a second feed point portion that is.

Mobile Terminal, Whip Antenna, Helical Antenna, Impedance Matching, Antenna Diversity

Description

ANTENNA APPRATUS OF MOBILE COMMUNICATION UNIT}

1 is a partial cross-sectional view showing the antenna device in the whip antenna is inserted in accordance with an embodiment of the present invention.

Figure 2 is a partial cross-sectional view showing the antenna device with the whip antenna pulled out in accordance with an embodiment of the present invention.

3 is a view showing a mobile communication terminal receiving apparatus according to an embodiment of the present invention.

4 is a diagram illustrating a mobile communication terminal receiving apparatus according to another embodiment of the present invention.

The present invention relates to an antenna device of a mobile communication terminal, and relates to an antenna device of a mobile communication terminal provided with a helical antenna and a whip antenna.

BACKGROUND OF THE INVENTION A mobile communication terminal having a helical antenna and a whip antenna has been released. Whip antennas are adopted by many portable terminals because of their shape, which allows them to be inserted into or taken out of the main body of a mobile communication terminal.

As a combination structure of a helical antenna and a whip antenna, various techniques are shown. Introducing the most widely used technique, the helical antenna is embedded in a housing in which the through-hole is formed in the longitudinal direction and disposed at a predetermined position of the main body. Then, the whip antenna penetrates along the through hole and is led into or taken out of the main body of the mobile communication terminal.

On the other hand, in the mobile communication terminal provided with a helical antenna and whip antenna as described above, an example of the configuration of a conventional antenna device is as follows. There is only one feed point portion, and the antenna signal received even when the whip antenna is inserted into the terminal body is output to the (single) feed point portion. And, even when the whip antenna is drawn out of the terminal body, the received antenna signal is also output to the (single) feed point portion.

When looking at the problems caused by the configuration of the conventional antenna device, first, a single impedance matching unit is connected to the aforementioned feed point unit. That is, according to the conventional antenna device configuration, two antennas are connected to the main body circuit through a single matching unit through the same feed point unit. Therefore, the antenna characteristics vary according to the entry / exit states of the whip antenna. Since it is impossible to design an optimized matching unit for each state, the matching unit having an intermediate characteristic is considered in consideration of some trade-off. It had to be designed.

For reference, SAR values are generally better at the whip antenna pull-out, and VSWR (voltage standing wave ratio) values are generally better at the whip antenna pull-in.

Meanwhile, in a mobile communication terminal, two antennas are designed, two paths for processing received signals from two different antennas are designed, and a diversity algorithm is implemented in the baseband unit to implement diversity. Implementing diversity has the effect of improving the radio characteristics of the mobile communication terminal.

However, having two antennas is disadvantageous in terms of design and also involves a problem of reduced space utilization for additional antennas. These limitations have been pointed out as obstacles to the implementation of diversity in mobile communication terminals, as opposed to the development trend of miniaturized and advanced mobile communication terminals. In this situation, there is a need to develop an antenna device suitable for implementing diversity in a mobile communication terminal.

The present invention has been made in such a situation, and in a mobile communication terminal provided with a helical antenna and a whip antenna, it is proposed to propose a new antenna device having a variety of application possibilities with the feed points of the helical antenna and the whip antenna separately. There is that purpose.

Furthermore, another object of the present invention is to propose an antenna device that supports optimal impedance matching according to the in / out state of a whip antenna.                         

Furthermore, another object of the present invention is to propose an antenna device suitable for implementing diversity in a mobile communication terminal.

Furthermore, another object of the present invention is to propose a method for implementing diversity while minimizing changes in the arrangement of the conventional helical antenna and whip antenna.

The present invention for achieving the above object, in the antenna device of the mobile communication terminal, when the helical antenna, the first feed point portion connected to the conductive portion of the helical antenna, the whip antenna and the whip antenna, the whip And a second feed point portion connected to the conductive portion of the antenna.

As a result, contact areas for electrical conduction vary according to the pull-in state or pull-out state of the whip antenna.

Furthermore, according to an additional aspect of the present invention, a helical antenna matching unit connected to the first feed point unit to match the impedance of the helical antenna signal, and a whip antenna connected to the second feed point unit to match the impedance of the whip antenna signal Characterized in that it further comprises a dragon matching unit.

As a result, since the feed point contact point is changed according to the entry / exit state of the whip antenna, it is possible to design an optimal matching unit according to each state. Regardless of the trade-offs considered in the conventional design, it is possible to improve the use efficiency of the antenna for each state and obtain better performance in measuring air sensitivity or SAR.

Furthermore, according to an additional aspect of the present invention, it characterized in that it further comprises a switching unit for selectively transmitting the antenna signal output from the matching portion for the helical antenna or the matching portion for the whip antenna to the receiving path of the mobile communication terminal. It is done.

Accordingly, a signal can be selectively received for each antenna. At this time, the signal for each antenna is in a state where the impedance matching is optimized.

Furthermore, according to a further aspect of the present invention, a helical antenna matching unit is connected to an input terminal of a first receiving path unit for receiving and processing the helical antenna signal, and a whip antenna matching unit is connected to an input terminal of a second receiving path unit for receiving and processing a whip antenna signal. The baseband processing unit of the mobile communication terminal receives the signals processed by the first receiving path unit and the second receiving path unit, and performs known diversity processing.

Accordingly, an antenna device suitable for implementing diversity in a mobile communication terminal can be proposed. While minimizing the change of the arrangement of the conventional helical antenna and whip antenna, it is possible to propose a method for realizing the diversity of the mobile communication terminal.

The foregoing and further aspects of the present invention will become more apparent through the following embodiments. Hereinafter, the present invention will be described in detail with reference to the preferred embodiments described with reference to the accompanying drawings so that those skilled in the art can easily understand and reproduce.

1 is a partial cross-sectional view showing an antenna device in a whip antenna is pulled in accordance with an embodiment of the present invention, Figure 2 is a partial cross-sectional view showing an antenna device in a whip antenna is pulled out in accordance with an embodiment of the present invention 3 is a diagram illustrating a mobile communication terminal receiving apparatus according to an embodiment of the present invention. Hereinafter, a description will be given with reference to the drawings.

As shown in the drawings, according to a preferred embodiment of the present invention, in the antenna device of the mobile communication terminal, the helical antenna 103, the conductive portion 105 of the helical antenna 103 And a first feed point portion 303 connected thereto, a whip antenna 111, and a second feed point portion 311 connected to the conductive portion 115 of the whip antenna when the whip antenna 111 is drawn out. Characterized in that the configuration.

As described above, a mobile communication terminal in which a helical antenna 103 and a whip antenna 111 are provided has been released. The whip antenna 111 is adopted by many portable terminals because of its shape characteristic, which can be pulled into or taken out of the main body of the mobile communication terminal. Therefore, the descriptions of the helical antenna 103 and the whip antenna 111 itself are known before the present invention is filed, and will be apparent to those skilled in the art, and thus the detailed description thereof will be omitted.

The helical antenna 103 is disposed at a predetermined position of the main body of the mobile communication terminal, for example. Reference numeral 109 denotes a mobile communication terminal body housing. In the embodiment of FIG. 1, the lower portion of the helical antenna 103 is a fixing portion 105, which is coupled with a corresponding fixing portion 107 inside the housing 109, whereby the helical antenna 103 and the main body housing 109. ) Is combined. In the embodiment of Figure 1, the contact surface of the fixing portion 105, 107 may be formed of a male / male spiral coupling. Reference numeral 117 denotes a printed circuit board, wherein a feed point unit 303, 311, 403, 411, a matching unit 305, 313, 405, 413, a reception path unit 315, 407, 415, Various internal circuits of the mobile communication terminal such as the switching unit 307, the baseband processing unit 417, and the like are disposed.

In an exemplary embodiment, the fixing part 105 of the helical antenna 103 may be formed of, for example, a conductive metal material to perform a function of the conductive part. Of course, the fixing part 107 formed in the main body housing 109 also performs the function of the conductive part. Reference numeral 119 denotes a hook for connecting the conductive portion 105 of the helical antenna 103 with the feed point portion 303 for the helical antenna 103.

Typically, the whip antenna 111 is provided with a conductive portion 115, and in a state where the whip antenna is drawn out, the whip antenna 111 is connected to a feed point portion provided on the circuit board 117 of the main body. In this embodiment, the conductive portion 115 is connected to the feed point portion 311 dedicated to the whip antenna. Reference numeral 121 is a hook for connecting the conductive portion 115 of the whip antenna 111 and the feed point portion 311 for the whip antenna 111.

As in the above-described embodiment, according to the present invention, there is proposed a new antenna device in which a contact portion for electrical conduction is changed according to the entry state or the exit state of the whip antenna.

According to a further aspect of the present invention, a helical antenna matching unit 305 connected to the first feed point unit 303 to match the impedance of the helical antenna signal, and connected to the second feed point unit 311 and whip. It is characterized in that it further comprises a whip antenna matching unit 313 for matching the impedance of the antenna signal.

The technique of designing a dedicated matching circuit for the helical antenna 103 or a dedicated matching circuit for the whip antenna 111 is known in the field of manufacture of mobile communication terminals before the present invention is filed. Detailed description of the technology itself will be omitted.

In this embodiment, since the feed point contact point is changed according to the entry / exit state of the whip antenna, it is possible to design the optimum matching units 305 and 313 according to each state. Regardless of the trade-offs considered in the conventional design, it is possible to improve the use efficiency of the antenna for each state and obtain better performance in measuring air sensitivity or SAR.

According to the auxiliary aspect of the present invention, the helical antenna 103 is embedded in the housing 103 in which the through hole is formed in the longitudinal direction, and the whip antenna 111 penetrates along the through hole, thereby causing a main body of the mobile communication terminal. It is characterized by being drawn in or withdrawn at 109.

The present invention can be applied to any type of antenna device if the mobile communication terminal using the helical antenna and whip antenna. In particular, as described above, it is also applicable to the helical / whip antenna structure that is commonly used.

According to the auxiliary aspect of the present invention, the conductive portion 115 of the whip antenna is formed in the lower portion of the whip antenna 111, the longitudinal direction is lower than the stopper portion 113 that maintains the state in which the whip antenna 111 is drawn out It is characterized in that the location.

This embodiment presents a specific implementation of the whip antenna 111. A predetermined portion of the body of the whip antenna 111 having a thin rod shape should be formed of a conductive portion 115. In the structure of the whip antenna 111 of the type to be pulled in / out through the through-hole formed in the helical antenna 103 in the longitudinal direction, the conductive portion 115 is extended to the portion extending downward in the longitudinal direction from the existing stopper portion 113. Forming a may be an example of minimizing the shape change of the existing whip antenna 111.

In one embodiment, the stopper portion 113 is divided into a portion having a diameter substantially the same as the diameter of the through hole of the helical antenna housing 103 and a portion larger than the diameter of the through hole. In the process of drawing out the whip antenna 111, the stopper part 113 may be fixed inside the helical antenna housing 103 so that the drawing state may be completed, or in some cases, the stopper part 113 may have a helical antenna housing ( In the embodiment of FIG. 1 at the inlet of 103, the drawing part may be fixed at the conductive part 105 to be completed.

According to an additional aspect of the present invention, a signal received from the helical antenna matching unit 305 and the antenna signal output from the whip antenna matching unit 313, any one of the signal receiving path unit 315 of the mobile communication terminal It is characterized in that it further comprises a switching unit 307 to selectively transfer to).

In the present invention, the reception path unit 135 performs reception processing such as low noise amplification, band pass filtering, frequency down-conversion, etc., for the analog antenna reception signal, and transmits the same to a conventional base band processing unit. Means a conventional circuit. The switching unit 307 selectively transmits one of two antenna signals of two input paths to the reception path unit 315, and it is obvious to those skilled in the art to implement such a switching unit 307.

4 is a diagram illustrating a mobile communication terminal receiving apparatus according to another embodiment of the present invention. Hereinafter, a description will be given with reference to the drawings.

As shown in FIG. 4, according to a further aspect of the present invention, a helical antenna matching unit 405 is connected to an input of a first receiving path unit 407 for receiving and processing a helical antenna signal, and whip antenna matching The unit 413 is connected to an input terminal of the second receiving path unit 415 for receiving and processing the whip antenna signal, and the baseband processing unit 417 of the mobile communication terminal is connected to the first receiving path unit 407 and the second receiving path. The receiving unit 415 receives the received signals, and performs known diversity processing.

Similar to the embodiment of FIG. 3, the helical antenna matching unit 405 is connected to the helical antenna feed point unit 403 to match the impedance of the helical antenna received signal 401. In addition, like the embodiment of FIG. 3, the whip antenna matching unit 413 is connected to the whip antenna feed point unit 411 to match the impedance of the whip antenna received signal 409.

Similar to the embodiment of FIG. 3, a technique for designing a dedicated matching circuit for the helical antenna 103 or a design for a dedicated matching circuit for the whip antenna 111 may be performed before the present invention is applied. Since it is known in the manufacturing field, detailed descriptions of the technology itself of the helical antenna matching unit 405 and the whip antenna matching unit 413 will be omitted.

In addition, as described above, the first receiving path unit 407 and the second receiving path unit 415 respectively receive processing such as low noise amplification, band pass filtering, frequency downconversion, etc. with respect to the analog received signal. And it means a conventional circuit that performs the role of delivering this to the conventional base band processing unit.

In addition, in one embodiment, the baseband processing unit 417 performs a demodulation operation in a manner that is preset for the mobile communication of the signal input from the reception path unit (407, 415). For example, the baseband processor 417 may perform CDMA modulation / demodulation operations such as channel decoding and quadrature decoding. In the present invention, the method of mobile communication is interpreted to cover not only various versions of CDMA, but also existing methods such as cellular, GSM, and W-CDMA, as well as mobile communication that will emerge in the future. In addition, according to the present invention, the baseband processor 417 receives signals from two reception paths 407 and 415, respectively, and performs a known diversity process.

In addition, as described above, in the mobile communication terminal, two antennas are designed, two paths for processing the received signals from two different antennas are respectively designed, and a diversity algorithm is performed in the baseband unit. Techniques for implementing the technology itself are known.

In an embodiment of the present invention, an antenna device suitable for implementing diversity in a mobile communication terminal can be proposed. While minimizing the change of the arrangement of the conventional helical antenna and whip antenna, it is possible to propose a method for realizing the diversity of the mobile communication terminal.

According to a further aspect of the present invention, the system control unit (not shown in FIG. 4) of the mobile communication terminal, in response to the user's operation signal, the first receiving path unit 407 or the second receiving path unit 415 It is characterized by selectively controlling the activation of.

The system controller controls the entire system according to an operation signal or an operation state input from an operation unit (not shown) of the mobile communication terminal. The system controller supports a convenient application environment such as a virtual machine, and can process various controls according to a characteristic aspect of the present invention by a program.

For example, in the state where the whip antenna 111 is retracted, reception processing is performed using the signal of the helical antenna 103. As in the state where the user moves to the shaded area, the system controller performs diversity processing only when necessary to prevent unnecessary current consumption. In an exemplary embodiment, the system controller performs diversity in response to a user's operation signal, such as a setting in a menu.

In another embodiment, a sensor may be separately provided to automatically recognize a state in which the whip antenna 111 is drawn, and diversity processing may be performed. In the current antenna application technology, even the whip antenna 111 is automatically developed to be automatically drawn in / out by a motor. The technology itself, such that the system control unit of the mobile communication terminal recognizes whether the whip antenna 111 is drawn out or drawn out, is obvious to those skilled in the art.

In another embodiment, only one antenna is normally used, and diversity may be performed when the received signal sensitivity is less than or equal to a threshold. Checking the sensitivity of the received signal can be implemented, for example, by checking the bit error rate of the decoder.

As described above, according to an embodiment of the present invention, in a mobile communication terminal provided with a helical antenna and a whip antenna, a new antenna device having a variety of application possibilities is proposed by separately separating feed points of the helical antenna and the whip antenna. do.

In addition, the present invention proposes an antenna device that supports optimal impedance matching according to the in / out state of a whip antenna. In addition, an antenna device suitable for implementing diversity in a mobile communication terminal is proposed. In addition, we propose a scheme that can implement diversity while minimizing changes in the arrangement of the conventional helical antenna and whip antenna.

Although the present invention has been described with reference to the accompanying drawings, it should not be construed as being limited thereto, but should be construed to cover many modifications that are obvious from this.

Claims (7)

delete A helical antenna; With a whip antenna; A first feed point part connected to the conductive part of the helical antenna; A second feed point portion connected to the conductive portion of the whip antenna when the whip antenna is drawn out; A matching unit for a helical antenna connected to the first feed point unit and matching an impedance of a signal received through the helical antenna; A matching unit for a whip antenna connected to the second feed point unit to match an impedance of a signal received through the whip antenna; Antenna device of a mobile communication terminal comprising a. 3. The helical antenna of claim 2, wherein the helical antenna is: It is embedded in the housing in which the through-hole is formed in the longitudinal direction; The whip antenna is: The antenna device of the mobile communication terminal, characterized in that the penetrating through the through-hole to the main body of the mobile communication terminal. 4. The whip antenna of claim 3, wherein the conductive portion of the whip antenna is: The antenna device of the mobile communication terminal is formed in the lower portion of the whip antenna, the whip antenna is located below the stopper to maintain the drawn state. The method of claim 2, A switching unit for selectively transferring any signal among the signal output from the helical antenna matching unit and the antenna signal output from the whip antenna matching unit to a receiving path unit of the mobile communication terminal; Antenna device of a mobile communication terminal further comprising. The matching part of claim 2, wherein the matching part for the helical antenna comprises: It is connected to the input terminal of the first receiving path unit for receiving and processing the helical antenna signal, Matching unit for the whip antenna: It is connected to the input terminal of the second receiving path portion for receiving and processing the whip antenna signal, The baseband processor of the mobile communication terminal: The antenna device of the mobile communication terminal, characterized in that for receiving a signal received from the first receiving path unit and the second receiving path unit, respectively, and performs a known diversity process. The method of claim 6, wherein the system control unit of the mobile communication terminal, And an antenna device for selectively controlling the activation of the first path unit or the second path unit.

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