KR101792415B1 - Ant communication apparatus with improved isolation between antennas - Google Patents

Abstract

An antenna communication apparatus according to an embodiment of the present invention includes: a substrate having a front surface having a first ground region and a first non-conductor region, and a rear surface opposite to the front surface; A first antenna disposed in a first non-conductor region of the substrate; A second antenna disposed in a first non-conductor area of the substrate, the second antenna being spaced apart from the first antenna by a first distance; A third antenna disposed at a first non-conductor area of the substrate, the third antenna being spaced apart from the first antenna by a second spacing distance, the third antenna being spaced apart from the second antenna by a third spacing distance; And an isolation pattern for performing isolation between the first antenna and the second antenna, and between the first antenna and the third antenna; .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an antenna communication apparatus,

The present invention relates to an antenna communication apparatus that can be applied to an electronic device such as a television set and can improve the isolation between a plurality of antennas.

Generally, in order to use wireless LAN (e.g., WiFi) communication and BT (Bluetooth, trademark) communication in one electronic device, the electronic device may include at least one antenna for WLAN and an antenna for BT. For example, to improve the performance of wireless LAN communication, two wireless LAN antennas may be included.

Further, in the case of performing wireless communication for 2.4GHz and BT communication for 2.4GHz at the same time in one electronic device, interference due to the same frequency can be generated, and a method for ensuring proper isolation should be provided.

Conventional antenna communication devices that may be applied to televisions may include a high frequency communication module and a BT antenna.

The high frequency communication module may include two wireless LAN (WiFi) antennas and a communication circuit disposed on a single PCB (PCB). The BT antenna is not included in the high frequency communication module but may be separately manufactured and connected to the high frequency communication module through a cable (approximately 165 mm). The BT antenna may include two wireless LAN antennas, a BT antenna, In order to secure the isolation of the capacitor.

For example, when a BT antenna and a wireless LAN (WiFi) antenna are included on one PCB, it is difficult to realize the isolation between the BT antenna and the WiFi antenna at about -20 dB or less.

In addition, the conventional antenna communication device may include one holder for coupling the high frequency communication module and the BT antenna, respectively. In this case, the high-frequency communication module and the BT antenna may be connected to each other by a cable (approximately 165 mm).

In the conventional communication device using the holder, the high frequency communication module and the BT antenna can maintain a certain distance from each other, and the cable can be fixed, so that some degree of isolation can be secured.

As described above, the antenna communication device including the holder in which the high frequency communication module and the BT antenna are combined can be mounted on an electronic device such as a television.

However, the communication apparatus using the holder has the following problems and problems.

- When there are two antennas and one BT antenna installed on one board, characteristic deviation occurs according to the shape of antenna cable.

- Workability at the time of mass production is bad, and it is disadvantageous in terms of volume when moving the logistics.

- Increase in size and cost due to holder configuration to fix the antenna.

- Increased cost of antenna manufacturing.

- Connector cost for antenna connection and failure due to dropout.

- Reduced component size requires set flexibility.

- A Method for Obtaining Isolation between BT Antenna and WiFi Antenna.

- Correlation Design Considering Antenna Efficiency and Isolation.

- Minimization of characteristic deterioration by cable position change.

- Distance between cable and antenna and separation of radio waves.

An embodiment of the present invention provides an antenna communication apparatus capable of improving isolation between a plurality of antennas mounted on a single substrate.

According to an embodiment of the present invention, there is provided a semiconductor device comprising: a substrate having a front surface having a first ground region and a first non-conductor region, and a rear surface opposite to the front surface; A first antenna disposed in a first non-conductor region of the substrate; A second antenna disposed in a first non-conductor area of the substrate, the second antenna being spaced apart from the first antenna by a first distance; A third antenna disposed at a first non-conductor area of the substrate, the third antenna being spaced apart from the first antenna by a second spacing distance, the third antenna being spaced apart from the second antenna by a third spacing distance; And an isolation pattern for performing isolation between the first antenna and the second antenna, and between the first antenna and the third antenna; Is proposed.

In the solution of this task, one of several concepts described in the following detailed description is provided. The subject matter of the present invention is not intended to identify the core or essential technology of the claimed subject matter, but merely one of the claimed subject matter is described, each of which is specifically set forth in the following detailed description.

According to an exemplary embodiment of the present invention, at least one BT antenna and at least one WLAN antenna can be manufactured in a smaller size than the conventional one, and the isolation between the BT antenna and the WLAN antenna can be improved , The efficiency of each antenna can be improved.

1 is a front view of an antenna communication apparatus including an antenna according to an embodiment of the present invention.
FIG. 2 is an explanatory view of the size of each of the gap and isolation pattern between the first antenna, the second antenna and the third antenna of FIG. 1;
3 is a rear configuration diagram of an antenna communication apparatus including an antenna according to an embodiment of the present invention.
4 is an enlarged view showing the size of the radiation control pattern of FIG.
5 is an explanatory diagram of an isolation pattern ISP1 disposed on the front surface of an antenna communication apparatus according to an embodiment of the present invention.
6 is an explanatory diagram of a radiation control pattern RAP1 disposed on the rear surface of an antenna communication apparatus according to an embodiment of the present invention.
7 is a view illustrating a state in which a data cable is connected to an antenna communication apparatus including an antenna according to an embodiment of the present invention.
8 is a graph showing isolation characteristics according to the length of the isolation pattern ISP1 according to the embodiment of the present invention.
9 is a graph showing isolation characteristics according to the line width of the radiation control pattern RAP1 according to the embodiment of the present invention.
10 is a graph showing an isolation change according to a dielectric constant of a substrate according to an embodiment of the present invention.

It should be understood that the present invention is not limited to the embodiments described and that various changes may be made without departing from the spirit and scope of the present invention.

In addition, in each embodiment of the present invention, the structure, shape, and numerical values described as an example are merely examples for helping understanding of the technical matters of the present invention, so that the spirit and scope of the present invention are not limited thereto. It should be understood that various changes may be made without departing from the spirit of the invention. The embodiments of the present invention may be combined with one another to form various new embodiments.

In the drawings referred to in the present invention, components having substantially the same configuration and function as those of the present invention will be denoted by the same reference numerals.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention.

FIG. 1 is a front view of an antenna communication apparatus including an antenna according to an embodiment of the present invention. FIG. 2 is a diagram illustrating a gap between the first antenna, the second antenna, to be.

1 and 2, an antenna communication apparatus 100 including an antenna according to an embodiment of the present invention includes a substrate 101, a first antenna ANT1, a second antenna ANT2, a third antenna ANT3 and a conductive isolation pattern ISP1.

The antenna communication apparatus 100 may further include a cable connector 120 and a high frequency communication circuit 130.

For example, each of the first antenna ANT1, the second antenna ANT2 and the third antenna ANT3 may be a pattern-type antenna, a chip-type antenna, have. As long as the first antenna ANT1, the second antenna ANT2 and the third antenna ANT3 can transmit and receive the frequency of the set communication band, the form and the type need not be specified.

For example, each of the first antenna ANT1, the second antenna ANT2, and the third antenna ANT3 may be an inverse F antenna of a conductor having a three-dimensional shape.

FIG. 3 is a rear view of an antenna communication apparatus including an antenna according to an embodiment of the present invention, and FIG. 4 is an enlarged view showing a size of the radiation control pattern of FIG.

Referring to FIGS. 3 and 4, the antenna communication apparatus may further include a conductive radiation adjustment pattern RAP1.

1 to 4, a substrate 101 includes a front surface having a first ground region GND1 and a first non-conductive region NGA1, and a rear surface opposite to the front surface, 2 ground region GND2 and a second non-conductor region NGA2.

For example, the first ground region GND1 and the second ground region GND2 may be formed of a conductive material, and the first non-conductor region NGA1 and the second non-conductor region NGA2 may be formed of a conductive material Which may be a non-region.

In this case, first, second and third antennas ANT 1, ANT 2 and ANT 3 and an isolation pattern ISP 1 may be arranged in the first non-conductor region NGA 1 (see FIG. 1) A radiation adjustment pattern RAP1 may be disposed in the conductor region NGA2 (see FIG. 3). No antennas are disposed in the first ground region GND1 and the second ground region GND2.

The first antenna ANT1 may be disposed in the first non-conductor region NGA1 of the substrate 101. [

The second antenna ANT2 may be disposed in the first non-conductor region NGA1 of the substrate 101 and may be spaced apart from the first antenna ANT1 by a first distance d1 ). The third antenna ANT3 is disposed in a first non-conductor area NGA1 of the substrate 101 and is spaced apart from the first antenna ANT1 by a second distance d2, ANT2) and the third separation distance d3 (see Fig. 2).

For example, in each embodiment of the present invention, the first antenna ANT1 may be an antenna of a first communication standard such as 2.4 GHz Bluetooth (trademark) communication, and the second antenna ANT2 and the third The antenna ANT3 may be an antenna using different frequencies (e.g., 2.4 GHz and 5 GHz) in a WLAN standard different from the first communication standard, but is not limited thereto.

In this case, the first antenna ANT1 needs to be isolated from an antenna using the same frequency among the second antenna ANT2 and the third antenna ANT3, and in order to ensure such isolation, Each of the separation distance d1 and the second separation distance d2 may be longer than the third separation distance d3.

The isolation pattern ISP1 may perform isolation between the first antenna ANT1 and the second antenna ANT2 and between the first antenna ANT1 and the third antenna ANT3.

For example, the isolation pattern ISP1 may be disposed between the second antenna ANT2 (or the third antenna ANT3) and the first antenna ANT1 in the front surface of the substrate 101, And may be connected to the grounding region GND1.

1 and 2, the cable connector 120 can perform connection with an external device.

The high frequency communication circuit 130 may be connected to the cable connector 120, the first antenna ANT1, the second antenna ANT2, and the third antenna ANT3 to perform wireless communication. For example, the high frequency communication circuit 130 may include various circuits, parts, and wiring patterns for performing wireless communication using the first antenna ANT1, the second antenna ANT2, and the third antenna ANT3. have.

3 and 4, the radiation control pattern RAP1 is disposed in a second non-conductor area NGA2 on the rear surface corresponding to the first non-conductor area NGA1 in which the first antenna ANT1 is disposed And can control the radiation efficiency of the first antenna ANT1.

For example, the first antenna ANT1 may be disposed on one side of both ends of the substrate 101 in the longitudinal direction of the substrate 100, and the second and third antennas ANT2 and ANT3 may be disposed on one side And may be disposed adjacent to the other side of both side ends of the substrate 101 in the longitudinal direction of the substrate 101.

For example, as long as the first antenna and the second antenna can be spaced apart from each other, and so long as the first antenna and the third antenna can be spaced apart from each other, they need not be specified in a specific position or arrangement.

Accordingly, as shown in FIG. 2, the first antenna ANT1 may be spaced apart from the second and third antennas ANT2 and ANT3, for example, ANT1 is spaced apart from the second antenna ANT2 by a first spacing d1 and the first antenna ANT1 is spaced apart from the third antenna ANT3 by the second spacing d2, This distance arrangement can contribute to securing isolation between the first antenna ANT1 and the second and third antennas ANT2 and ANT3.

Also, the second and third antennas ANT2 and ANT3 may be spaced apart by a third distance d3.

When the high frequency communication circuit 130 is disposed between the second and third antennas ANT2 and ANT3 and the cable connector 120, the second and third antennas ANT2 and ANT3 and the cable connector 120 120 can be performed.

For example, the high-frequency communication circuit 130 may include a shield can surrounding the outer surface of the high-frequency communication circuit 130 to prevent radiation of its own high-frequency signal and signal input from the outside, have.

5 is an explanatory diagram of an isolation pattern ISP1 disposed on the front surface of an antenna communication apparatus according to an embodiment of the present invention.

Referring to FIG. 5, the isolation pattern ISP1 includes a first isolation pattern P11 and a second isolation pattern P12.

In addition, the isolation pattern ISP1 may further include a third isolation pattern P13.

The first isolation pattern P11 may be connected to the first grounding region GND1 to electrically connect the first grounding region GND1 and the second isolation pattern P12.

The second isolation pattern P12 may be formed on at least one of the second and third antennas ANT2 and ANT3 and the first antenna ANT1 through the first isolation pattern P11. Conductor region (NGA1) between the first non-conductor region (NGA1) and the second non-conductor region (NGA1).

The third isolation pattern P13 may be connected to the second isolation pattern P12 and extend to a corner nearest to the first antenna ANT1 of the corner of the substrate 101. [

For example, the third isolation pattern P13 may be smaller than the length and width of the second isolation pattern P12, but is not limited thereto.

The isolation pattern ISP1 may be formed, for example, as shown in FIGS. 1 and 5, and may include at least one of the second antenna ANT2 and the third antenna ANT3, ANT1) is not limited to a specific shape.

The isolation pattern ISP1 absorbs a signal by the first antenna ANT1 and a signal by the second and third antennas ANT2 and ANT3 and transfers the signal to the first ground region GND1, ANT3 and at least one of the second and third antennas ANT2 and ANT3 and the first antenna ANT1 and the second antenna ANT2, ANT1) can be improved.

For example, the radiation characteristics of the first antenna ANT1 may be adjusted according to the shape of the isolation pattern ISP1. For example, the radiation pattern can be adjusted by adjusting the pattern width of the isolation pattern ISP1, and the isolation pattern ISP1 can be implemented so that a proper efficiency value required when the radiation pattern ISP1 is used can be obtained.

1 to 5, the size of the isolation pattern ISP1 and the spacing between the isolation pattern ISP1 and the respective antennas will be described.

For example, when the length of the antenna communication apparatus according to an embodiment of the present invention is 80-90 mm and the width is 25-35 mm, the length of the isolation pattern ISP1 is 16 mm to 17 mm and the width ) May be 2.0 mm to 3.0 mm.

The first spacing distance d1 between the first and second antennas may be 30-40 mm and the second spacing distance d2 between the first and third antennas may be 56-66 mm, The third separation distance d3 between the three antennas ANT2 and ANT3 may be 9.5 mm to 10.5 mm, and this is only one example, so it is not limited thereto.

6 is an explanatory diagram of a radiation control pattern RAP1 disposed on the rear surface of an antenna communication apparatus according to an embodiment of the present invention.

1 to 6, the radiation control pattern RAP1 is disposed in a second non-conductor area NGA2 on the rear surface corresponding to the first non-conductor area NGA1 in which the first antenna ANT1 is disposed So that the radiation efficiency of the first antenna ANT1 can be controlled.

Referring to FIG. 6, the radiation control pattern RAP1 may include a first radiation control pattern P21 and a second radiation control pattern P22.

For example, the first radiation adjustment pattern P21 may be disposed on the second non-conductor region NGA2 of the rear surface of the substrate 101 and connected to the second grounding region GND2, And the second radiation control pattern P22 can be electrically connected to each other.

The second radiation adjustment pattern P22 is electrically connected to the second grounding region GND2 through the first radiation adjustment pattern P21 and is electrically connected to the first non- (NGA2) corresponding to the first non-conductor region (NGA1).

The second radiation adjustment pattern P22 is disposed in the same direction as the arrangement direction of the first antenna ANT1 from the opposite surface opposite to the surface of the substrate 101 on which the first antenna ANT1 is mounted. .

For example, the second radiation adjustment pattern P22 may be disposed on one side edge of the rear surface of the substrate 101 in the longitudinal direction. The second radiation adjustment pattern P22 may be disposed in a longitudinal direction of the rear surface of the first antenna ANT1 opposite to the mounting surface of the first antenna ANT1.

For example, the radiation efficiency of the first antenna ANT1 may be adjusted by changing the line width of the second radiation control pattern P22.

For example, the radiation control pattern RAP1 may be formed in a shape as shown in FIGS. 3 and 6, absorbing a part of the energy propagated from the first antenna ANT1 to form a second ground region GND2 So long as the first antenna ANT1 and the antennas ANT2 and ANT3 for wireless LAN can smoothly perform their respective antenna functions.

At this time, the radiation control pattern RAP1 absorbs a certain portion of the energy propagated from the first antenna ANT1 to adjust radiation intensity, and the first antenna ANT1, the second antenna ANT2, The antenna efficiency of the first antenna can be adjusted so that each antenna ANT3 can smoothly perform its antenna function.

On the other hand, in a communication device having an antenna, radiation efficiency and isolation are important factors that determine characteristics of an electronic device, and are considered in designing an antenna. In order to maximize the isolation, the first antenna ANT1 needs to be implemented so that the radiation efficiency can be controlled.

Referring to FIG. 3, when the antenna communication apparatus according to an embodiment of the present invention has a length of 80-90 mm and a width of 25-35 mm, the radiation control for controlling the radiation efficiency of the first antenna ANT1 The length L2 of the pattern RAP1 may be 33-43 mm, and the width W2 thereof may be 0.6 mm to 1.6 mm, but is not limited thereto.

7 is a view illustrating a state in which a data cable is connected to an antenna communication apparatus including an antenna according to an embodiment of the present invention.

Referring to FIG. 7, a data cable may be connected to the cable connector 120 of the antenna communication device 100.

The cable connector 120 of the antenna communication apparatus 100 is connected to the second and third antennas ANT2 and ANT3 by the high frequency communication circuit 130 so as to reduce electromagnetic interference with the second and third antennas ANT2 and ANT3. (ANT2, ANT3).

Accordingly, as described above, the isolation characteristics between the second and third antennas ANT2 and ANT3 and the cable connector 120 can be improved.

Further, a shield can surrounding the outer surface of the high-frequency communication circuit 130 may be employed. In this case, the influence of the change of the propagation flow by the cable on the two wireless antennas ANT2 and ANT3 can be further reduced have.

FIG. 8 is a graph showing the isolation characteristics according to the length of the isolation pattern ISP1 according to the embodiment of the present invention. FIG. 9 is a graph showing the linewidth W2 (FIG. 4) of the radiation pattern RAP1 according to the embodiment of the present invention. And FIG. 10 is a graph showing changes in isolation depending on the dielectric constant of the substrate according to the embodiment of the present invention.

The graph shown in FIG. 8 shows that the isolation characteristics can be adjusted according to the length of the isolation pattern ISP1. The graph shown in FIG. 9 shows that the isolation characteristic can be adjusted according to the line width of the radiation control pattern RAP1. The graph shown in FIG. 10 shows that the isolation characteristics can be adjusted according to the dielectric constant of the substrate.

Referring to FIGS. 8 to 10, the isolation pattern ISP1 absorbs and adjusts the energy of a specific frequency according to the pattern length (which can be replaced with a chip inductor) and the dielectric constant Epsilon of the substrate, thereby improving the isolation performance .

Here, the dielectric constant of the substrate 101 (e.g., PCB) can be fixed according to a substrate stack (PCB stack) specific to the product based on the dielectric constant 4.3 of the FR4 (substrate) material.

In addition, the isolation pattern ISP1 is implemented on the basis of the fixed dielectric constant value, and one end of the pattern is connected to the first grounding region GND1 through the first pattern and the second and third patterns P12 , P13) may be arranged at the edge of the substrate without being connected to any metal surface.

For example, the second and third patterns P12 and P13 may be defined as a pattern having an equivalent length of? / 4 in consideration of the capacitances and inductances of the passive elements and the like, The pattern length and permittivity of the patterns P12 and P13 may have an inversely proportional relationship with the isolation operating frequency (see Figs. 8 to 10).

On the other hand, the measurement values of the isolation between the BT antenna and the WLAN antenna according to the embodiment of the present invention can be as shown in Table 1 below.

The measured values of the isolation shown in Table 1 show the measured values of isolation between the first antenna ANT1 and the second and third antennas ANT2 and ANT3.

In Table 1, the minimum value was -30.7 (dB), the maximum value was -31.3 (dB), and the average value was -31.17 (dB) as measured from 10 samples (SPL # .

The isolation between the first antenna ANT1 and the first wireless LAN antenna ANT2 can be kept at -30 dB or less and the isolation between the first antenna ANT1 and the second antenna ANT2 can be ensured. ) Is less than -30 dB.

100: Antenna communication device
101: substrate
120: Cable connector
130: High frequency communication circuit

Claims (14)

A substrate having a front side having a first ground region and a first non-conductor region and a rear side opposite to the front side;
A first antenna disposed in a first non-conductor region of the substrate;
A second antenna disposed in a first non-conductor area of the substrate, the second antenna being spaced apart from the first antenna by a first distance;
A third antenna disposed at a first non-conductor area of the substrate, the third antenna being spaced apart from the first antenna by a second spacing distance, the third antenna being spaced apart from the second antenna by a third spacing distance; And
An isolation pattern for performing isolation between the first antenna and the second antenna, and an isolation between the first antenna and the third antenna; Lt; / RTI >
The isolation pattern
A first isolation pattern connected to the first ground region; And
A second isolation pattern disposed on an edge of a front surface of the substrate and extending to a first non-conductor region between at least one of the second and third antennas and the first antenna among the front surface of the substrate through the first isolation pattern, ;
≪ / RTI >
The semiconductor device according to claim 1,
Wherein at least one of the second antenna and the third antenna is disposed between the first antenna and the ground, and the second antenna and the third antenna are connected to the ground region.
2. The apparatus of claim 1, wherein the first antenna is an antenna of a first communication standard,
Wherein the second antenna and the third antenna are antennas using different frequencies within a WLAN standard different from the first communication standard,
Wherein each of the first spacing distance and the second spacing distance is longer than the third spacing distance.
delete 2. The method of claim 1,
And a third isolation pattern connected to the second isolation pattern and extending to a corner closest to the first antenna among the corners of the substrate.
The antenna of claim 1, further comprising: a radiation control pattern disposed in a second non-conductor area on the rear surface corresponding to the first non-conductor area in which the first antenna is disposed, the radiation control pattern controlling the radiation efficiency of the first antenna;
Further comprising:
[7] The method of claim 6,
A first radiation control pattern disposed in a second non-conductor region of the rear surface of the substrate and connected to a second ground region; And
A second radiation control pattern connected to the second grounded region through the first radiation control pattern and disposed in the second non-conductive region corresponding to the first non-conductive region in which the first antenna is disposed;
≪ / RTI >
8. The method of claim 7, wherein the second radiation control pattern
Wherein the first antenna is disposed in the same direction as the arrangement direction of the first antenna, of the rear surface opposite to the mounting surface of the first antenna.
A substrate having a front side having a first ground region and a first non-conductor region and a rear side opposite to the front side;
A first antenna disposed in a first non-conductor region of the substrate;
A second antenna disposed in a first non-conductor area of the substrate, the second antenna being spaced apart from the first antenna by a first distance;
A third antenna disposed at a first non-conductor area of the substrate, the third antenna being spaced apart from the first antenna by a second spacing distance, the third antenna being spaced apart from the second antenna by a third spacing distance;
An isolation pattern for performing isolation between the first antenna and the second antenna, and an isolation between the first antenna and the third antenna;
A cable connector for connecting to an external device;
A high frequency communication circuit connected to the cable connector, the first antenna, the second antenna and the third antenna to perform wireless communication; And
A radiation control pattern disposed in a second non-conductor area on the rear surface corresponding to the first non-conductor area in which the first antenna is disposed, the radiation control pattern controlling the radiation efficiency of the first antenna; Lt; / RTI >
The isolation pattern
A first isolation pattern connected to the first ground region;
A second isolation pattern disposed on an edge of a front surface of the substrate and extending to a first non-conductor region between at least one of the second and third antennas and the first antenna among the front surface of the substrate through the first isolation pattern, ; And
A third isolation pattern connected to the second isolation pattern and extending to a corner closest to the first antenna among the corners of the substrate;
≪ / RTI >
10. The semiconductor device according to claim 9,
Wherein at least one of the second antenna and the third antenna is disposed between the first antenna and the ground, and the second antenna and the third antenna are connected to the ground region.
delete [10] The method of claim 9,
A first radiation control pattern disposed in a second non-conductor region of the rear surface of the substrate and connected to a second ground region; And
And connected to the second grounding region through the first radiation control pattern
A second radiation control pattern disposed in the second non-conductor area corresponding to a first non-conductor area in which the first antenna is disposed;
≪ / RTI >
10. The apparatus of claim 9, wherein the high frequency communication circuit
Wherein the first and second antennas are disposed between the second and third antennas and the cable connector, and perform the isolation between the second and third antennas and the cable connector.
10. The apparatus of claim 9, wherein the high frequency communication circuit
And a shield can enclosing the outer surface of the high frequency communication circuit so as to block the radiation of the high frequency signal and the inflow of signals from the outside and to improve the isolation.

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