KR102320427B1 - Circuit board - Google Patents

Abstract

The present invention relates to a circuit board, and more particularly, to a circuit board on which a plurality of antennas are disposed. To this end, according to the present invention, the circuit board includes: a plurality of power supply circuit units disposed on a circuit board; and an insulating unit formed along an edge of the circuit board and formed outside the plurality of power supply circuit units, to remove interference between the antennas of each of the plurality of power supply circuit units.

Description

circuit board {CIRCUIT BOARD}

The present invention relates to a circuit board, and more particularly, to a circuit board on which a plurality of antennas are disposed.

In general, as the demand for high-capacity and high-quality multimedia services in wireless mobile communication technology increases, the improvement of communication speed, reliability, and increase of data communication capacity are accelerating. As described above, in order to increase the reliability of the transmitted and received data signal and to overcome the limitation of the data transmission amount due to the expansion of data communication, a communication device employs a technology using multiple antennas.

However, when multiple antennas are embedded in a limited space of a communication device (e.g., router, mobile phone, etc.), electromagnetic mutual coupling or insufficient isolation between multiple antennas occurs due to spatial restrictions. can be After all, due to these characteristics, there is a problem in that important performances of the antenna are greatly deteriorated.

Accordingly, in order to improve communication speed, reliability, and data communication capacity, there is a need to remove interference between multiple antennas disposed on a circuit board of a communication device.

To this end, the present invention provides a circuit board including a plurality of antennas.

It is also an object of the present invention to dispose an insulating part on the circuit board so as to eliminate interference between the antennas of each of the power feeding circuit parts disposed on the circuit board.

Another object of the present invention is to arrange an insulating part along the edge of the circuit board so that a central part of the circuit board and a part in which each of the plurality of power supply circuit parts are located are physically separated.

Another object of the present invention is to form an insulating part on the circuit board to be connected to the transmission line part of each of the plurality of power supply circuit parts.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention not mentioned may be understood by the following description, and will be more clearly understood by the examples of the present invention. Moreover, it will be readily apparent that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

In order to achieve this object, the present invention provides a circuit board, a plurality of power supply circuit units disposed on the circuit board, and an rim of the circuit board to eliminate interference between the antennas of each of the plurality of power supply circuit units, and , may include an insulating part formed outside the plurality of power supply circuit parts.

By disposing the insulating part on the circuit board according to the present invention, interference between antennas can be eliminated.

In addition, according to the present invention, the interference between the antennas of each of the plurality of power supply circuit units can be eliminated by disposing the insulating unit along the edge of the circuit board on the circuit board.

In addition to the above-described effects, the specific effects of the present invention will be described together while describing specific details for carrying out the invention below.

1A is an exemplary view illustrating a front surface of a circuit board according to an embodiment of the present invention.
1B is an exemplary view illustrating a rear surface of a circuit board according to an embodiment of the present invention.
2A is an exemplary diagram schematically illustrating an antenna pattern of a circuit board according to an embodiment of the present invention.
2B is an exemplary diagram illustrating an antenna pattern of a circuit board according to an embodiment of the present invention.
3A is an exemplary diagram illustrating a return loss in a first antenna according to an embodiment of the present invention.
3B is an exemplary diagram in which a return loss in the first antenna is expressed as a standing wave ratio according to an embodiment of the present invention.
4A is an exemplary diagram illustrating a return loss in a second antenna according to an embodiment of the present invention.
4B is an exemplary diagram in which a return loss in a second antenna is expressed as a standing wave ratio according to an embodiment of the present invention.
5A is an exemplary diagram illustrating a return loss in a third antenna according to an embodiment of the present invention.
5B is an exemplary diagram in which a return loss in a third antenna is expressed as a standing wave ratio according to an embodiment of the present invention.
6A is an exemplary diagram illustrating a return loss in a fourth antenna according to an embodiment of the present invention.
6B is an exemplary diagram in which a return loss in a fourth antenna is expressed as a standing wave ratio according to an embodiment of the present invention.
7A is an exemplary diagram illustrating a return loss in a fifth antenna according to an embodiment of the present invention.
7B is an exemplary diagram in which a return loss in the fifth antenna is expressed as a standing wave ratio according to an embodiment of the present invention.
8A is an exemplary diagram illustrating insulation between a first antenna and a second antenna according to an embodiment of the present invention.
8B is an exemplary diagram illustrating insulation between a first antenna and a third antenna according to an embodiment of the present invention.
8C is an exemplary diagram illustrating insulation between a first antenna and a fourth antenna according to an embodiment of the present invention.
8D is an exemplary diagram illustrating insulation between a first antenna and a fifth antenna according to an embodiment of the present invention.
8E is an exemplary diagram illustrating insulation between a second antenna and a third antenna according to an embodiment of the present invention.
8F is an exemplary diagram illustrating insulation between a second antenna and a fourth antenna according to an embodiment of the present invention.
8G is an exemplary diagram illustrating insulation between a second antenna and a fifth antenna according to an embodiment of the present invention.
8H is an exemplary diagram illustrating insulation between a third antenna and a fourth antenna according to an embodiment of the present invention.
8I is an exemplary diagram illustrating insulation between a third antenna and a fifth antenna according to an embodiment of the present invention.
8J is an exemplary diagram illustrating insulation between a fourth antenna and a fifth antenna according to an embodiment of the present invention.

The above-described objects, features and advantages will be described below in detail with reference to the accompanying drawings, and accordingly, those of ordinary skill in the art to which the present invention pertains will be able to easily implement the technical idea of the present invention. In describing the present invention, if it is determined that a detailed description of a known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

Although the first, second, etc. are used to describe various elements, these elements are not limited by these terms, of course. These terms are only used to distinguish one component from other components, and unless otherwise stated, the first component may be the second component, of course.

In the following, that an arbitrary component is disposed on the "upper (or lower)" of a component or "upper (or below)" of a component means that any component is disposed in contact with the upper surface (or lower surface) of the component. Furthermore, it may mean that other components may be interposed between the component and any component disposed on (or under) the component.

Also, when it is described that a component is "connected", "coupled" or "connected" to another component, the components may be directly connected or connected to each other, but other components are "interposed" between each component. It is to be understood that “or, each component may be “connected,” “coupled,” or “connected” through another component.

Throughout the specification, unless otherwise stated, each element may be singular or plural.

As used herein, the singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as "consisting of" or "comprising" should not be construed as necessarily including all of the various components or various steps described in the specification, some of which components or some steps are It should be construed that it may not include, or may further include additional components or steps.

Throughout the specification, when “A and/or B” is used, it means A, B or A and B, unless specifically stated to the contrary, and when “C to D” is used, it means that there is no specific contrary description. Unless otherwise specified, it means that it is greater than or equal to C and less than or equal to D.

Hereinafter, circuit boards according to some embodiments of the present invention will be described.

1A is an exemplary view illustrating a front surface of a circuit board according to an embodiment of the present invention. 1B is an exemplary view illustrating a rear surface of a circuit board according to an embodiment of the present invention.

1A and 1B , a plurality of power supply circuit units 110 , 120 , 130 , 140 , and 150 may be disposed on the circuit board 100 of the present invention. Each of the plurality of power supply circuit units 110 , 120 , 130 , 140 , and 150 may be disposed at positions spaced apart from each other on the circuit board 100 . Each of the plurality of power supply circuit units 110 , 120 , 130 , 140 , and 150 may be formed outside the circuit board 100 . Each of the plurality of power supply circuit units 110 , 120 , 130 , 140 , and 150 may include an antenna corresponding to a frequency of a different band.

According to an embodiment, the circuit board 100 may include an insulating unit 160 for removing interference between antennas of each of the plurality of power supply circuit units 110 , 120 , 130 , 140 , and 150 . The insulating part 160 may be formed along the edge of the circuit board 100 . In addition, the insulating part 160 may be disposed on the circuit board 100 to be formed outside each of the plurality of power supply circuit parts 110 , 120 , 130 , 140 , 150 .

According to an embodiment, the antenna included in each of the plurality of power supply circuit units 110, 120, 130, 140, 150 transmits a signal using a frequency of a different band or receives a signal transmitted through the corresponding frequency. can receive When transmission or reception of a signal occurs through an antenna included in at least one of the plurality of power supply circuit units 110 , 120 , 130 , 140 , 150 , the frequency used for transmitting or receiving the signal is transmitted to another adjacent antenna. It can be caused by interference. In order to prevent (eg, remove or reduce) such interference, an insulating part may be formed on the circuit board 100 on the outside of each of the plurality of power supply circuit parts 110 , 120 , 130 , 140 , and 150 . In addition, an insulating part formed outside each of the plurality of power supply circuit parts 110 , 120 , 130 , 140 , 150 may be connected to one insulating part 160 . In addition, the insulating part 160 may be formed along the edge of the circuit board 100 in another part where each of the plurality of power supply circuit parts 110 , 120 , 130 , 140 , 150 is not located. In addition, the insulating part 160 may be formed in a line type having a predetermined interval (eg, 1 m).

According to an embodiment, the insulating part 160 may be configured to physically separate a central portion of the circuit board 100 and a portion in which each of the plurality of power supply circuit units 110 , 120 , 130 , 140 and 150 is located. It may be formed along the edge of the circuit board 100 .

According to an embodiment, the insulating part 160 may be formed on the circuit board to be connected to the transmission line part of the antenna included in each of the plurality of power supply circuit parts 110 , 120 , 130 , 140 , 150 . have. To transmit or receive a signal via an antenna, the frequency may be caused by interference to other adjacent antennas. In order to prevent (eg, remove or reduce) such interference, an insulating part may be formed on the circuit board 100 on the outside of each of the plurality of power supply circuit parts 110 , 120 , 130 , 140 , and 150 .

According to an embodiment, in the insulating part 160 , one end of the insulating part 160 (eg, a starting point of the insulating part 160 ) is connected to a plurality of power supply circuit parts 110 , 120 , 130 , 140 , 150 . ) of the third power supply circuit unit 130 is connected to the transmission line unit 131 , and the other end of the insulating unit 160 (eg, the end point of the insulating unit 160 ) is connected to the plurality of power supply circuit units 110 . , 120 , 130 , 140 , 150 may be formed to be connected to the transmission line unit 141 of the fourth power supply circuit unit 140 . The third power supply circuit unit 130 and the fourth power supply circuit unit 140 may be disposed on the circuit board 100 at the farthest distance (eg, left and right ends of the circuit board 100 ).

According to an embodiment, the insulating part 160 connecting the transmission line part 131 of the third power supply circuit part 130 and the transmission line part 141 of the fourth power supply circuit part 140 is the Among the plurality of power supply circuit units 110 , 120 , 130 , 140 , 150 , the first power supply circuit unit 110 and the second power supply circuit unit are disposed between the third power supply circuit unit 130 and the fourth power supply circuit unit 140 . 120 and the fifth power supply circuit unit 150 may be formed to be connected to the respective transmission line units 111 , 121 , and 151 .

According to an embodiment, one end of the insulating part 160 may be formed along the edge of the circuit board 100 starting from a point connected to the transmission line part 131 of the third power feeding circuit part 130 . . In addition, the insulating part 160 formed along the edge of the circuit board 100 is located in the vicinity of each of the first power supply circuit part 110 , the second power supply circuit part 120 , and the fifth power supply circuit part 150 . It may be formed inside the circuit board 100 (eg, formed to have an angle of 90 degrees). In addition, the insulating part 160 may be formed along the edge again in parts other than the vicinity of each of the first power feeding circuit part 110 , the second power feeding circuit part 120 , and the fifth power feeding circuit part 150 . can The transmission line parts 111 , 121 , and 151 of each of the first power supply circuit part 110 , the second power supply circuit part 120 , and the fifth power supply circuit part 150 are a middle portion of the insulating part 160 . can be connected in

According to an embodiment, the insulating part 160 may be formed in a line type having a predetermined interval (eg, 1 mm). The region of the insulating part 160 may be a non-ground (Non-GND) region.

According to an embodiment, one end of each of the transmission line units 111 , 121 , 131 , 141 , 151 formed in each of the plurality of power supply circuit units 110 , 120 , 130 , 140 , 150 may include a corresponding power supply circuit unit. It may be connected to any one of the ports 212 , 222 , 232 , 242 , and 252 that can receive a signal corresponding to a frequency band. Each of the ports 212 , 222 , 232 , 242 , and 252 may be connected to a corresponding communication module (eg, an LTE module, a 5G (NR) module, a GPS module, etc.). For example, one end of the transmission line unit 111 formed in the first power supply circuit unit 110 is connected to the first port 212 , and one end of the transmission line unit 121 formed in the second power supply circuit unit 120 is connected to the first port 212 . The end may be connected to the second port 222 . In addition, one end of the transmission line unit 131 formed in the third power feeding circuit unit 130 is connected to the third port 232 , and one end of the transmission line unit 141 formed in the fourth power feeding circuit unit 140 is One end of the transmission line unit 151 connected to the fourth port 242 and formed in the fifth power supply circuit unit 150 may be connected to the fifth port 252 . A signal is input through each port.

According to an embodiment, the other end of each of the transmission line units 111 , 121 , 131 , 141 and 151 formed in each of the plurality of power supply circuit units 110 , 120 , 130 , 140 , 150 is in the corresponding power supply circuit unit. It may be connected to a signal feeder. For example, the other end of the transmission line unit 111 formed in the first power feeding circuit unit 110 is connected to the first signal feeding unit 112 in the first power feeding circuit unit 110 , and the second power feeding circuit unit 120 . ), the other end of the transmission line unit 121 may be connected to the second signal feeding unit 122 in the second power feeding circuit unit 120 . Similarly, the other end of the transmission line unit 131 formed in the third power feeding circuit unit 130 is connected to the third signal feeding unit 132 in the third power feeding circuit unit 130 , and to the fourth power feeding circuit unit 140 . The other end of the formed transmission line unit 141 is connected to the fourth signal feeding unit 142 in the fourth power feeding circuit unit 140 , and the other end of the transmission line unit 151 formed in the fifth power feeding circuit unit 150 . may be connected to a fifth signal feeding unit 152 in the fifth power feeding circuit unit 150 . A signal may be radiated to the outside through a pattern antenna connected to each signal feeding unit.

According to an embodiment, each of the plurality of power supply circuit units 110 , 120 , 130 , 140 , and 150 may include a signal unit, a signal power supply unit, and a ground region. The signal unit may ground the electrical signal. The signal unit and the signal feeding unit may be disposed at positions spaced apart from each other based on a predetermined distance. For example, the first power feeding circuit unit 110 may be formed to include a first signal feeding unit 112 , a first signal unit 113 , and a first ground region 114 . The second power feeding circuit unit 120 may be formed to include a second signal feeding unit 122 , a first signal unit 123 , and a first ground region 124 . The third power supply circuit unit 130 may be formed to include a third signal power supply unit 132 , a third signal unit 133 , and a third ground region 134 . The fourth power supply circuit unit 140 may be formed to include a fourth signal power supply unit 142 , a fourth signal unit 143 , and a fourth ground region 144 . The fifth power supply circuit unit 150 may be formed to include a fifth signal power supply unit 152 , a fifth signal unit 153 , and a fifth ground region 154 . Each of the signal feeding units 112 , 122 , 132 , 142 , and 152 , and each of the signal units 113 , 123 , 133 , 143 , 153 may be made of metal (eg, copper, etc.) and plated with gold. can be

According to an embodiment, between the transmission line parts 111 , 121 , 131 , 141 , 151 of each of the plurality of power supply circuit parts 110 , 120 , 130 , 140 , 150 and the circuit board 100 are non- A non-ground region may be formed.

According to an embodiment, the first feed circuit unit 110 among the plurality of feed circuit units 110, 120, 130, 140, 150 is an antenna having a frequency of Long Term Evolution (LTE) Bands 1, 5, and 7; may include. Among the plurality of power supply circuit units 110 , 120 , 130 , 140 , and 150 , the second power supply circuit unit 120 may include an antenna having a frequency of n78 of LTE Bands 1, 7, and NR (New Radio). . The third power supply circuit unit 130 among the plurality of power supply circuit units 110 , 120 , 130 , 140 , 150 may include an antenna having a frequency of n78 of NR. The fourth power supply circuit unit 140 among the plurality of power supply circuit units 110 , 120 , 130 , 140 , and 150 may include an antenna having a frequency of n78 of LTE Bands 1 and 7 and NR. In addition, the fifth power supply circuit unit 150 among the plurality of power supply circuit units 110, 120, 130, 140 and 150 includes an antenna having a frequency of LTE Bands 1, 5, 7, n78 of NR, and GPS L1. can do. A position of each power supply circuit unit on the circuit board 100 may be variably changed. In addition, each of the plurality of power supply circuit units 110 , 120 , 130 , 140 , 150 has the length of the pattern antenna even if it has a different frequency as well as the frequency of LTE Band 1, 5, 7, n78 of NR, or GPS L1. It can be used variably by adjusting the

2A is an exemplary diagram schematically illustrating an antenna pattern of a circuit board according to an embodiment of the present invention. 2B is an exemplary diagram illustrating an antenna pattern of a circuit board according to an embodiment of the present invention.

2A and 2B , each of the signal units 112 and 122 of the plurality of power supply circuit units 110 , 120 , 130 , 140 , 150 is disposed on the circuit board 100 according to an embodiment of the present invention. , 132 , 142 , and 152 may include respective antenna patterns 211 , 221 , 231 , 241 , and 251 . For example, the first signal unit 112 may include a first antenna pattern 211 , and the second signal unit 122 may include a second antenna pattern 221 . In addition, the third signal unit 132 includes a third antenna pattern 231 , the fourth signal unit 142 includes a fourth antenna pattern 241 , and the fifth signal unit 152 includes a fifth An antenna pattern 251 may be included. An injection-molded product 260 may be disposed on the circuit board 100 . In addition, each of the antenna patterns 211 , 221 , 231 , 241 , and 251 may be disposed on the injection-molded product 260 . Each of the antenna patterns 211 , 221 , 231 , 241 , and 251 may be formed of a metal material using an In Molding Antenna (IMA) manufacturing method and Laser Direct Structuring (LDS).

According to an embodiment, the length of each of the antenna patterns 211 , 221 , 231 , 241 , and 251 may be variably adjusted based on the frequency. For example, as the frequency increases, the length of the antenna pattern may be shortened to correspond to the frequency.

3A is an exemplary diagram illustrating a return loss in a first antenna according to an embodiment of the present invention. 3B is an exemplary diagram in which a return loss in the first antenna is expressed as a standing wave ratio according to an embodiment of the present invention.

According to an embodiment, each of the plurality of antennas disposed on the circuit board 100 may operate based on different frequencies.

For example, the first to fifth antennas of the present invention may transmit or receive signals based on the frequencies shown in Table 1 below.

first antenna (Primary) LTE B5 Tx(MHz) 839-849 Rx (MHz) 884-894 LTE B1 Tx(MHz) 1920-1940 Rx (MHz) 2110~2130 LTE B7 Tx(MHz) 2520-2540 Rx (MHz) 2640-2660 Second antenna (Diversity) LTE B1 Rx (MHz) 2110~2130 LTE B7 Rx (MHz) 2640-2660 NR n78 TRx (MHz) 3420~3500 third antenna NR n78 TRx (MHz) 3420~3500 4th antenna (Diversity) LTE B1 Rx (MHz) 2110~2130 LTE B7 Rx (MHz) 2640-2660 NR n78 TRx (MHz) 3420~3500 5th antenna (Diversity) LTE B5 Rx (MHz) 884-894 GPS L1 Rx (MHz) 1575 LTE B1 Rx (MHz) 2110~2130 LTE B7 Rx(MHz) 2640-2660 NR n78 TRx (MHz) 3420~3500

Referring to FIG. 3A , a horizontal axis (eg, X-axis) indicates a frequency band used by the first antenna, and a vertical axis (eg, Y-axis) indicates a return loss in the first antenna (S (1, 1)). The magnitude 310 of (return loss, RL) is expressed in dB. According to an embodiment, the first antenna may transmit/receive signals through frequencies 311a, 311b, 312, 313a, and 313b of Long Term Evolution (LTE) Bands 1, 5, and 7.

For example, the transmission frequency 311a in Band 1 is about 1.92 GHz to 1.99 GHz, and the reception frequency 311b in Band 1 is about 2.09 GHz to 2.14 GHz. And, the transmit frequency and the receive frequency 312 in Band 5 are about 0.81 GHz to 0.9 GHz. In addition, the transmission frequency 313a in Band 7 is about 2.50 GHz to 2.57 GHz, and the reception frequency 313b in Band 7 is about 2.63 GHz to 2.7 GHz. The return loss at frequencies of LTE Bands 1, 5, and 7 using the first antenna has a waveform 310 as shown in FIG. 3A.

The return loss may be converted into a standing wave radio (SWR) using Equation 1 below.

Referring to FIG. 3B, when the return loss in LTE Bands 1, 5, and 7 of the first antenna S (1, 1) is converted into SWR, the SWR in LTE Bands 1, 5, and 7 is It is possible to obtain a waveform 320 according to

And, average gain and efficiency in LTE Bands 1, 5, and 7 are generally shown in [Table 2] below.

first antenna Band 5 Band 1 Band 7 Tx Rx Tx Rx Tx Rx efficiency 57.4% 41.7% 28.5% 36.8% 72.9% 76.4% average gain -2.4dBi -3.9dBi -5.5dBi -4.4dBi -1.4dBi -1.7dBi

4A is an exemplary diagram illustrating a return loss in a second antenna according to an embodiment of the present invention. 4B is an exemplary diagram in which a return loss in a second antenna is expressed as a standing wave ratio according to an embodiment of the present invention.

Referring to FIG. 4A , the horizontal axis (eg, the X-axis) represents a frequency band used by the second antenna, and the vertical axis (eg, the Y-axis) is the return loss in the second antenna (S (2, 2)). The magnitude 410 of (return loss, RL) is expressed in dB. According to an embodiment, the second antenna may transmit/receive signals through frequencies 411, 412, and 413 of LTE Bands 1, 7, and NR n78.

Referring to FIG. 4B, when the return loss in LTE Bands 1, 5, and NR n78 of the second antenna S (2, 2) is converted to SWR, in LTE Bands 1, 7, and NR n78 A corresponding waveform 420 with SWR can be obtained.

And, the average gain and efficiency in LTE Bands 1, 7, and NR n78 are generally shown in [Table 3] below.

second antenna Band 1 Band 7 n78 Tx Rx Tx Rx efficiency - 37.1% - 91.9% 38.7% average gain - -2.6dBi - -0.4dBi -4.1dBi

5A is an exemplary diagram illustrating a return loss in a third antenna according to an embodiment of the present invention. 5B is an exemplary diagram in which a return loss in a third antenna is expressed as a standing wave ratio according to an embodiment of the present invention.

Referring to FIG. 5A , the horizontal axis (eg, the X-axis) represents a frequency band used by the third antenna, and the vertical axis (eg, the Y-axis) is the return loss in the third antenna (S (3, 3)). The magnitude 510 of (return loss, RL) is expressed in dB. According to an embodiment, the third antenna may transmit/receive a signal through a frequency 511 of NR n78.

Referring to FIG. 5B , when the return loss at NR n78 of the third antenna S (2, 2) is converted to SWR, a waveform 520 having an SWR at NR n78 may be obtained.

And, average gain and efficiency at NR n78 are generally shown in [Table 4] below.

third antenna n78 efficiency 59.9% average gain -2.2dBi

6A is an exemplary diagram illustrating a return loss in a fourth antenna according to an embodiment of the present invention. 6B is an exemplary diagram in which a return loss in a fourth antenna is expressed as a standing wave ratio according to an embodiment of the present invention.

Referring to FIG. 6A , the horizontal axis (eg, the X-axis) represents a frequency band used by the fourth antenna, and the vertical axis (eg, the Y-axis) is the return loss in the fourth antenna (S (4, 4)). The magnitude 610 of (return loss, RL) is expressed in dB. According to an embodiment, the fourth antenna may transmit/receive signals through LTE Bands 1, 7, and frequencies 611, 612, and 613 of NR n78.

Referring to FIG. 6b, when the return loss in LTE Bands 1, 7, and NR n78 of the fourth antenna S (4, 4) is converted to SWR, in LTE Bands 1, 7, and NR n78 A corresponding waveform 620 with SWR can be obtained.

And, the average gain and efficiency in LTE Bands 1, 7, and NR n78 are generally shown in [Table 5] below.

4th antenna Band 1 Band 7 n78 Tx Rx Tx Rx efficiency - 39.2% - 84.9% 50.9% average gain - -4.1dBi - -0.7dBi -2.9dBi

7A is an exemplary diagram illustrating a return loss in a fifth antenna according to an embodiment of the present invention. 7B is an exemplary diagram in which a return loss in the fifth antenna is expressed as a standing wave ratio according to an embodiment of the present invention.

Referring to FIG. 7A , a horizontal axis (eg, X-axis) indicates a frequency band used by the fifth antenna, and a vertical axis (eg, Y-axis) indicates a return loss in the fifth antenna (S (5, 5)). The magnitude 710 of (return loss, RL) is expressed in dB. According to an embodiment, the fifth antenna may transmit/receive signals through LTE Bands 1, 5, 7, GPS, and frequencies (711, 712, 713, 714, 715) of NR n78.

Referring to FIG. 7b, when the return loss in LTE Bands 1, 5, 7, GPS and NR n78 of the fifth antenna (S (5, 5)) is converted into SWR, LTE Bands 1, 5, 7, A waveform 720 can be obtained with GPS and SWR at NR n78.

And, the average gain and efficiency in LTE Bands 1, 5, 7, GPS and NR n78 are generally shown in [Table 6] below.

5th antenna Band 5 GPS Band 1 Band 7 n78 Tx Rx Tx Rx Tx Rx efficiency - 70.3% 41.6% - 54.4% - 99.7% 35.1% average gain - - 1.5 dBi -3.6 dBi - -2.6 dBi - -0.13 dBi -4.6 dBi

8A is an exemplary diagram illustrating insulation between a first antenna and a second antenna according to an embodiment of the present invention. 8B is an exemplary diagram illustrating insulation between a first antenna and a third antenna according to an embodiment of the present invention. 8C is an exemplary diagram illustrating insulation between a first antenna and a fourth antenna according to an embodiment of the present invention. 8D is an exemplary diagram illustrating insulation between a first antenna and a fifth antenna according to an embodiment of the present invention. 8E is an exemplary diagram illustrating insulation between a second antenna and a third antenna according to an embodiment of the present invention. 8F is an exemplary diagram illustrating insulation between a second antenna and a fourth antenna according to an embodiment of the present invention. 8G is an exemplary diagram illustrating insulation between a second antenna and a fifth antenna according to an embodiment of the present invention. 8H is an exemplary diagram illustrating insulation between a third antenna and a fourth antenna according to an embodiment of the present invention. 8I is an exemplary diagram illustrating insulation between a third antenna and a fifth antenna according to an embodiment of the present invention. 8J is an exemplary diagram illustrating insulation between a fourth antenna and a fifth antenna according to an embodiment of the present invention.

Referring to FIGS. 8A to 8J , it can be confirmed that the isolation between the respective antennas according to an embodiment of the present invention has a value (eg, -15 dB) below a certain level. As described above, it can be seen that by disposing the insulating part 160 on the circuit board 100 according to an embodiment of the present invention, interference between the respective antennas is alleviated. [Table 7] below is a table schematically showing the performance of the conventional circuit board and the circuit board according to the present invention.

LB (Low-Band)
0-1GHz MB (Mid-Band)
1-2GHz HB (High-Band)
2-3GHz Ultra-High-Band (UHB)
3-6GHz Conventional PCB -9dB~-11dB -10dB~-12dB -10dB~-15dB -10dB~-15dB PCB of the present invention -15dB~-20dB -16dB~-25dB -16dB~-25dB -16dB~-25dB

By disposing the insulating part 160 on the circuit board 100 according to an embodiment of the present invention, it can be confirmed that the average gain in LB, MB, HB, and UHB has a performance of -15 dB or less. have.

9 is an exemplary diagram illustrating a degree of insulation between antennas according to an embodiment of the present invention.

Referring to FIG. 9 , when signals are transmitted/received through a plurality of antennas based on various frequency bands 910 , 911 , 912 , 913 and 914 on the circuit board 100 according to an embodiment of the present invention, adjacent By removing or reducing the interference or isolation generated by at least one antenna, it can be seen that the return loss between the plurality of antennas is -15 dB or less.

For example, the maximum value of the return loss 921 between the fifth antenna and the first antenna is about -20 dB, and the maximum value of the return loss 922 between the fifth antenna and the second antenna is -17 dB. As such, it can be seen that the return loss between the antennas has a value of -15 dB or less.

Each step in each of the above-described flowcharts may be operated regardless of the illustrated order, or may be performed simultaneously. In addition, at least one component of the present invention and at least one operation performed by the at least one component may be implemented in hardware and/or software.

As described above, the present invention has been described with reference to the illustrated drawings, but the present invention is not limited by the embodiments and drawings disclosed in the present specification. It is obvious that variations can be made. In addition, although the effects according to the configuration of the present invention are not explicitly described and described while describing the embodiments of the present invention, it is natural that the effects predictable by the configuration should also be recognized.

100: circuit board 110: first power supply circuit unit
120: second power supply circuit unit 130: third power supply circuit unit
140: fourth power supply circuit unit 150: fifth power supply circuit unit
160: insulation

Claims (10)

In the circuit board,
a plurality of power supply circuit units disposed on the circuit board; and
and an insulating part formed along the edge of the circuit board to remove interference between the antennas of each of the plurality of power supply circuit parts and formed outside the plurality of power supply circuit parts,
the insulator,
One end of the insulating part is connected to the transmission line part of the first power feeding circuit part of the plurality of power feeding circuit parts, and the other end of the insulating part is connected to the transmission line part of the second feeding circuit part of the plurality of power feeding circuit parts. being a circuit board.
According to claim 1,
the insulator,
It is formed along the edge so that the central portion of the circuit board and the portion in which each of the plurality of power supply circuit units are located are physically separated,
Each of the plurality of power supply circuit units is a circuit board disposed outside the circuit board.
According to claim 1,
the insulator,
A circuit board formed on the circuit board to be connected to a transmission line part of each of the plurality of power supply circuit parts.
According to claim 1,
The first power supply circuit unit and the second power supply circuit unit are disposed on the circuit board at a position furthest away from each other.
5. The method of claim 4,
The insulating part connecting the transmission line part of the first power supply circuit part and the transmission line part of the second power supply circuit part may include a second power supply circuit part disposed between the first power supply circuit part and the second power supply circuit part among the plurality of power supply circuit parts. A circuit board formed to be connected to a transmission line portion of each of the third power supply circuit unit, the fourth power supply circuit unit, and the fifth power supply circuit unit.
According to claim 1,
The insulating portion is a circuit board formed in a line type having a predetermined interval.
According to claim 1,
One side of each transmission line formed in each of the plurality of power supply circuit parts,
A circuit board connected to a port for receiving a signal corresponding to a frequency band of the corresponding power supply circuit unit.
According to claim 1,
Each of the plurality of power supply circuit units includes a signal unit, a signal power supply unit, and a ground region,
The signal unit and the signal feeding unit are disposed at positions spaced apart based on a predetermined distance.
According to claim 1,
Each of the plurality of power supply circuits includes an antenna pattern to correspond to the length of the antenna,
The antenna pattern is a circuit board disposed on the injection-molded product on the circuit board.
According to claim 1,
Among the plurality of power feeding circuits, a first feeding circuit includes an antenna having a frequency of LTE (Long Term Evolution) Bands 1, 5, and 7,
Among the plurality of power feeding circuits, the second feeding circuit includes an antenna having a frequency of n78 of LTE Bands 1, 7, and NR (New Radio),
A third power feeding circuit part of the plurality of feeding circuit parts includes an antenna having a frequency of n78 of NR,
Among the plurality of power feeding circuits, a fourth feeding circuit includes an antenna having a frequency of n78 of LTE Bands 1, 7, and NR,
A circuit board comprising an antenna having a frequency of LTE Bands 1, 5, 7, n78 of LTE Bands 1, 5, 7, NR, and a GPS L1 of a fifth feeding circuit among the plurality of power feeding circuits.

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