KR100579698B1 - Antenna and mobile terminal equipment to which the antenna can be applied - Google Patents

Abstract

The present invention relates to an antenna that can be easily assembled with a mobile terminal.

The antenna includes a first helical antenna connected to the conductive inner core; At least one second helical antenna; A link member connecting one side of each of the second helical antennas; A dielectric cylinder into which the conductive inner core is inserted; A core into which the dielectric cylinder is inserted; It is formed on one side of the core and has a coupler member that can be coupled to the link member.

Description

ANTENNA AND MOBILE TERMINAL EQUIPMENT TO WHICH THE ANTENNA CAN BE APPLIED}             

1 is a diagram illustrating a typical mobile terminal.

Figure 2a is a view showing a state in which the whip antenna is taken out of the terminal body.

Figure 2b is a view showing a state in which the whip antenna is inserted into the terminal body.

3 is a view showing a vertical radiation pattern of the antenna shown in FIG.

4 is a side view showing a state in which the antenna is assembled according to an embodiment of the present invention.

5 is an exploded perspective view of the antenna showing the structure of the antenna according to an embodiment of the present invention in detail.

6 is a perspective view of the antenna showing a state in which the antenna is assembled according to an embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

1: conductive core 2: upper helical antenna

3: conductive inner core 4, 5: lower helical antenna

7 conductive link 8 dielectric cylinder

9 conductive coupler 10 integrated lower helical antenna

11: terminal body 12: antenna

13: high frequency signal source 14: antenna housing

15: whip antenna 16: helical antenna

The present invention relates to an antenna that can be easily assembled with a mobile terminal. The present invention also relates to a mobile terminal assembled with the antenna.

In a wireless communication network such as a mobile communication network or a wireless local loop (WLL), a base station is installed between an exchange station and a subscriber's mobile terminal, and radio signals are exchanged between the base station and the subscriber's mobile terminal. The mobile terminal and the base station are provided with an antenna for transmitting and receiving radio signals.

The antenna of the mobile terminal is generally configured in such a way that a high frequency signal source 13 is connected between the monopole antenna 12 and the grounded terminal body 11 as shown in FIG. The monopole antenna 12 applied to the mobile terminal is classified into a whip antenna and a helical antenna.

As shown in FIGS. 2A and 2B, the whip antenna 15 is designed to have a length of λ / 4 when the wavelength of the frequency is λ in order to maximize transmission / reception efficiency, and the helical antenna 16 has a length for propagation. Is λ / 4 and is designed to be twisted in a spiral to reduce the length. The whip antenna 15 has a higher gain than the helical antenna 16, but is designed to be liftable due to aesthetic problems due to its length, and is designed to be used in combination with the helical antenna 16. The whip antenna 15 is inserted into the housing 14 installed on one side of the upper end of the terminal body 11. When the whip antenna 15 is taken out of the terminal body 11, the high frequency signal source 13 is connected to the whip antenna 15 as shown in FIG. 2A, while the whip antenna 15 is inside the terminal body 11. When inserted into the high frequency signal source 13 is connected to the helical antenna 16 as shown in FIG.

When the monopole antenna 12 is an ideal ground plane, an image is formed in a direction opposite to the ground plane. As such, the antenna of the mobile terminal operates as if it is a dipole. However, in general, the ground plane of the mobile terminal is not ideal, so the ground plane affects the antenna performance of the mobile terminal.

In the mobile terminal, the effect of the ground plane on the antenna mainly depends on the length of the mobile terminal. The antenna of the mobile terminal operates in optimum performance when the length L1 of the monopole antenna 12 is λ / 4 and the length L2 of the terminal body 11 is λ / 4 in FIG. 1.

The body length L2 of the mobile terminal is generally designed to be λ / 4 of the propagation wavelength used in the cellular system. Therefore, the antenna of the mobile terminal operates with the best transmission / reception efficiency when operating on the cellular basis because the length of the mobile terminal body 11 is optimized to λ / 4 based on the cellular scheme. However, when such a mobile terminal is used in a PCS (Personal Communication Service) method, the length of the mobile terminal body 11 is about 1.5 times as large as that of the cellular method in the PCS where the frequency of use is approximately twice as high as that of the cellular method. Becomes lambda / 2. For this reason, the current flowing in the mobile terminal body 11 becomes relatively larger than the current flowing in the monopole antenna 12. As a result, as shown in FIG. 3, the antenna radiation pattern 20 in the PCS mobile terminal is lower, that is, the terminal. It is inclined toward the body 11. Therefore, when the mobile terminal designed based on the cellular method is applied to the PCS frequency, the antenna radiation pattern 20 is reduced in the −90 ° to + 90 ° direction as shown in FIG. 3. This phenomenon generally acts as a cause of reducing the transmission / reception efficiency of the mobile terminal considering that the base station antenna is located above the terminal.

In order to solve this problem, the applicant has proposed a separate ground antenna through the Republic of Korea Patent Application No. 10-2004-0011584. By the proposed ground antenna, the mobile terminal can prevent distortion of the antenna radiation pattern in any use frequency environment regardless of the terminal body 11 and can increase the transmission / reception efficiency. However, in order to assemble the proposed ground antenna to the mobile terminal, it is necessary to improve the connection structure between the ground antenna and the mobile terminal in consideration of assembly convenience.

Accordingly, an object of the present invention is to provide an antenna that is easy to assemble with a mobile terminal.

Another object of the present invention is to provide a mobile terminal assembled with the antenna.

In order to achieve the above object, an antenna according to an embodiment of the present invention comprises a first helical antenna connected to the conductive inner core; At least one second helical antenna; A link member connecting one side of each of the second helical antennas; A dielectric cylinder into which the conductive inner core is inserted; A core into which the dielectric cylinder is inserted; It is formed on one side of the core and has a coupler member that can be coupled to the link member.

The link member has a bent elastic portion.

The coupler member has a groove into which the elastic portion of the link member can be inserted.

The first helical antenna is supplied with a high frequency signal power via the conductive inner core.

The length of each of the second helical antennas is λ / 4 with respect to the propagation wavelength λ.

Each of the second helical antennas receives a base voltage via the link member and the coupler member.

Each of the second helical antennas is separated from the link member at an angle of approximately 10 ° to 60 ° with respect to the link member.

An antenna according to an embodiment of the present invention includes a first helical antenna; At least one second helical antenna; A signal transmission member connected to the first helical antenna to supply high frequency signal power to the first helical antenna; A link member connecting one side of each of the second helical antennas; A base voltage transfer member for supplying a base voltage to the link member; And a dielectric disposed between the signal transmission member and the base voltage transmission member.

The signal transmission member has a conductive inner core connected to one side of the first helical antenna and inserted into the dielectric and to which the high frequency signal power is applied.

The ground voltage transmitting member includes a conductive core into which the dielectric is inserted and to which the ground voltage is applied; It is formed on one side of the conductive core and has a coupler member that can be coupled to the link member.

A mobile terminal according to an embodiment of the present invention includes a first helical antenna connected to a conductive inner core, at least one or more second helical antennas, a link member connecting one side of each of the second helical antennas, and a dielectric cylinder into which the conductive inner core is inserted. An antenna including a core into which the dielectric cylinder is inserted, and a coupler member formed at one side of the core and coupled to the link member; The antenna has a terminal body that can be assembled.

A mobile terminal according to an embodiment of the present invention is a signal transmission member connected to a first helical antenna, at least one or more second helical antennas, and the first helical antenna to supply high frequency signal power to the first helical antenna, the first An antenna having a link member connecting one side of each of the two helical antennas, a base voltage transmitting member supplying a base voltage to the link member, and a dielectric provided between the signal transmitting member and the base voltage transmitting member; The antenna has a terminal body that can be assembled.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 4 to 6.

4 to 6, an antenna according to an embodiment of the present invention includes an upper helical antenna 2 receiving high frequency signal power, at least one lower helical antenna 4 and 5 each of which is grounded at one side thereof; And a conductive link 7 for integrally connecting the lower helical antennas 4, 5.

The antenna further includes a conductive inner core 3 connected to one end of the upper helical antenna 2, a dielectric cylinder 8 through which the conductive inner core 3 passes, a conductive core 1 surrounding the dielectric cylinder 8, A conductive coupler 9 formed at one end of the conductive core 1 is further provided.

The upper helical antenna 2 acts as a monopole antenna with the entire length of the twisted conductor as λ / 4 with respect to the propagation wavelength λ. The upper helical antenna 2 is supplied with high frequency signal power from a high frequency signal source in a mobile terminal (not shown) via the conductive inner core 3. This upper helical antenna 2 is assembled perpendicular to the conductive link 7.

The lower helical antennas 4, 5 are each λ / 4 with respect to the propagation wavelength λ and are integrally connected by the conductive link 7, respectively, with the total length of the twisted conductors. The lower helical antennas 4 and 5 are applied with a ground voltage GND via a conductive core 1, a conductive coupler 9 and a conductive link 7.

In the center of the dielectric cylinder 8, an insertion hole into which the conductive inner core 3 can be inserted is formed. The dielectric cylinder 8 serves to electrically insulate between the conductive core 1 and the conductive inner core 3 by the conductive inner core 3 penetrating the center thereof and being covered with the conductive core 1.

The conductive link 7 is connected to one side of each of the lower helical antennas 4 and 5 and has a base voltage GND applied via the conductive core 1 and the conductive coupler 9 to each of the lower helical antennas ( 4, 5) serves as a signaling medium to deliver. The conductive link 7 also serves to secure the lower helical antennas 4, 5 to the conductive coupler 9. For this purpose, the conductive link 7 comprises an elastic portion 7a which is bent concave. The elastic portion 7a of the conductive link 7 is pressed against the conductive coupler 9 while being opened by a light pressing force.

5, 6 denotes an integral lower helical antenna including lower helical antennas 4 and 5 and conductive link 7.

The conductive coupler 9 is formed on one side of the conductive core 1 in a stepped manner. The conductive core 1 is connected to the high frequency signal source in the mobile terminal and is coupled to the conductive link 7 via the conductive coupler 9 to transfer the ground voltage GND to the lower helical antennas 4 and 5. .

A strip-shaped groove 9a is formed at a constant depth on the outer circumferential surface of the conductive coupler 9. The elastic portion 7a of the conductive link 7 is pressed into the groove 9a of the conductive coupler 9.

The average gain and the transmission / reception rate of the mobile terminal may be adjusted according to the length and the open angle θ of each of the lower helical antennas 4 and 5. Here, the angle of the lower helical antennas 4 and 5 is 10 ° to 60 °, preferably 20, so that the antenna radiation pattern is optimal and the change is small according to the change in the length of the lower helical antennas 4 and 5. It should be 45 ° to 45 °.

In the assembly of such an antenna, first, the conductive inner core 3 connected to the upper helical antenna 2 is inserted into the dielectric cylinder 8 such that one end of the conductive inner core 3 is exposed. The dielectric cylinder 8 is inserted into the conductive core 1. After the upper helical antenna 2, the conductive inner core 3, and the dielectric cylinder 8 are assembled in this way, the assembler or assembling automation device moves the elastic portion 7a of the conductive link 7 to the groove of the conductive coupler 9. After assembling to 9a, the elastic portion 7a is pressed to couple the conductive link 7 to the conductive coupler 9, thereby completing the assembly of the antenna. The antenna assembled as shown in FIG. 6 is assembled with the antenna terminal.

The antenna can increase the transmit / receive sensitivity of the antenna with respect to the full azimuth in any use frequency environment by the lower helical coils 4 and 5 serving as grounding means, regardless of the length of the mobile terminal body.

As described above, an antenna according to the present invention and a mobile terminal to which the antenna is applicable may be used regardless of the length of the mobile terminal using at least one lower helical antenna having a length of λ / 4 with respect to a propagation wavelength λ. It is possible to prevent distortion of the antenna radiation pattern in the environment and to improve transmission / reception efficiency. Furthermore, the lower helical antennas are integrally formed and the assembly structure of the bent elastic portion and the groove makes the assembly of the antenna easier and the antenna And the assembly of the mobile terminal becomes easy.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (14)

A first helical antenna connected to the conductive inner core; At least one second helical antenna; A link member connecting one side of each of the second helical antennas; A dielectric cylinder into which the conductive inner core is inserted; A core into which the dielectric cylinder is inserted; And a coupler member formed at one side of the core and coupled to the link member. The method of claim 1, The link member, An antenna comprising a bent elastic portion. The method of claim 2, The coupler member, And an groove into which the elastic part of the link member is inserted. The method of claim 1, And the first helical antenna is supplied with a high frequency signal power via the conductive inner core. The method of claim 1, And the length of each of the second helical antennas is λ / 4 with respect to a propagation wavelength λ. The method of claim 1, And each of the second helical antennas is supplied with a base voltage via the link member and the coupler member. The method of claim 1, Each of the second helical antennas, And an antenna extending from the link member at an angle of 10 degrees to 60 degrees with respect to the link member. A first helical antenna; At least one second helical antenna; A signal transmission member connected to the first helical antenna to supply high frequency signal power to the first helical antenna; A link member connecting one side of each of the second helical antennas; A base voltage transfer member for supplying a base voltage to the link member; And a dielectric provided between the signal transmission member and the base voltage transmission member. The method of claim 8, The signal transmission member, And a conductive inner core connected to one side of the first helical antenna and inserted into the dielectric and to which the high frequency signal power is applied. The method of claim 9, The base voltage transmission member, A conductive core into which the dielectric is inserted and to which the base voltage is applied; And a coupler member formed at one side of the conductive core and coupled to the link member. The method of claim 10, The link member, An antenna comprising a bent elastic portion. The method of claim 11, The coupler member, And an groove into which the elastic part of the link member is inserted. A first helical antenna connected to the conductive inner core, at least one or more second helical antennas, a link member connecting one side of each of the second helical antennas, a dielectric cylinder into which the conductive inner core is inserted, a core into which the dielectric cylinder is inserted, and An antenna formed on one side of the core and including a coupler member coupled to the link member; A mobile terminal, characterized in that the antenna has a terminal body assembling. A first helical antenna, at least one or more second helical antennas, a signal transmission member connected to the first helical antenna to supply high frequency signal power to the first helical antenna, and a link connecting one side of each of the second helical antennas An antenna having a member, a base voltage transfer member for supplying a base voltage to the link member, and a dielectric provided between the signal transmission member and the base voltage transfer member; A mobile terminal, characterized in that the antenna has a terminal body assembling.

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