KR100803348B1 - Assembly for portable rf receiver equipped with a built-in antenna - Google Patents

Abstract

An assembly for a portable RF(Radio Frequency) receiver having an embedded antenna is provided to block a propagation path of noise caused by propagation of electromagnetic waves between antennas and each PCB(Printed Circuit Board) by using an electro-magnetic shielding bracket, thereby suppressing generation of noise. An electro-magnetic shielding bracket(100) consists of the first surface(101), the second surface(102) opposing the first surface, and the third surface(103) for forming an electro-magnetic shielding film by being protruded from at least one edge of the first and second surfaces(101,102). A display panel(200) is mounted on the first surface. The first PCB(300) is mounted on the second surface. More than one antenna(400) is mounted on the third surface. A housing receives the bracket, the first PCB, and the antenna, and exposes a display of the display panel.

Description

Assembly for portable RF receiver equipped with a built-in antenna

1 is a block diagram schematically illustrating a portable RF receiver in which a digital broadcast receiver and a GPS receiver are combined into one.

2 is an exploded perspective view of a first time point A showing an assembly for a portable RF receiver according to an embodiment of the invention.

3 is an exploded perspective view of a second time point B showing the assembly for the portable RF receiver of FIG. 2.

4 is a perspective view illustrating the antenna 400 illustrated in FIGS. 2 and 3.

5A and 5B are photographs illustrating a front portion and a rear portion of a portable RF receiver having a built-in antenna according to an embodiment of the present invention, respectively.

Explanation of symbols on the main parts of the drawings

100: electromagnetic shielding bracket 200: display panel

202c and 300: printed circuit board 400: antenna

500: housing

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an assembly for a portable RF receiver, and more particularly, to digital multimedia / digital audio broadcasting (DMB, DAB) and global positioning system (GPS) signals of various frequency bands. An assembly for a portable RF receiving device capable of receiving.

Recently, due to the development of semiconductor integrated technology and communication technology, the multifunctionality of the portable RF receiver has been promoted. As a representative example, there is a commercially available product in which a digital broadcast receiver for viewing and listening to digital video broadcast and digital audio broadcast and a GPS receiver for calculating navigation information from a signal received from a satellite are implemented as a portable RF receiver. I can point out.

1 is a block diagram schematically illustrating a portable RF receiver in which a digital broadcast receiver and a GPS receiver are combined into one.

Referring to FIG. 1, the portable RF receiving apparatus 100 includes a control central information processing unit 10, a memory unit 20 for storing data, a bus 30 for signal input and output, and an output unit 40 as a liquid crystal display. The digital broadcasting receiver module 60 and the GPS receiver module 70 using the video output unit 41 and the audio output unit 42 as a common platform are included.

The digital broadcast receiver module 60 includes, for example, an antenna unit 61 and an antenna unit 61 for receiving signals in the 174 MHz to 204 MHz or 2.6 GHz band transmitted through a data communication network such as a local broadcast or satellite network. And a decoder 62 of a coded orthogonal frequency division multiflexing (COFDM) for extracting broadcast information based on information output from the < RTI ID = 0.0 > The GPS receiver module 70 includes an antenna unit 71 for receiving satellite signals in the 1.57 GHz band and a decoder unit 72 for extracting and calculating navigation information from position and time information received from the antenna unit 71. Is done.

These antenna units 61 and 71 not only provide noise to peripheral circuits constituting a common platform, but also can be supplied with noise from peripheral circuits and thus are adopted externally. In addition, according to the trend of miniaturization of products, an external antenna is preferred to secure a mounting area of a main printed circuit board. In particular, the antenna 71 of the GPS receiver module 70 is covered with a plastic injection molding and is arranged to protrude out of the housing of the portable RF receiver, and moves in a certain degree of freedom in consideration of the reception sensitivity according to the position and angle of the antenna unit 71. Is designed to be. However, the external antenna has a problem that the portability is reduced by increasing the volume, and the productivity is not only reduced due to the increase in assembly parts in manufacturing, but also the possibility of damage due to carelessness due to the protruding shape.

Therefore, the technical problem to be achieved by the present invention is to improve the noise problem of the built-in antenna to secure the reception sensitivity to increase the applicability of the built-in antenna, and to reduce the manufacturing cost compared to the external antenna, portable and durable portable It is to provide an assembly for a portable RF receiver that can provide an RF receiver.

An assembly for a portable RF receiver according to the present invention for achieving the above technical problem, protrudes from a first surface, a second surface facing the first surface and at least one edge of the first surface and the second surface And a bracket for electromagnetic shielding including a third surface forming an electromagnetic shielding film having a predetermined height, wherein a display panel is mounted on the first surface, and a first printed circuit board is mounted on the second surface. One or more antennas are mounted on the surface. The housing may accommodate the electromagnetic shielding bracket, the first printed circuit board, and the antenna, and provide a portable RF receiver having a built-in antenna by exposing the display unit of the display panel.

In the present invention, the electromagnetic wave shielding bracket may be coated with a conductive material on the first surface, the second surface and the third surface in order to provide a separation region in which electromagnetic waves are shielded. In addition, the conductive material may electrically connect the first surface, the second surface, and the third surface to provide a common ground portion for the display panel, the first printed circuit board, and the antenna. The antenna unit, a substrate; An antenna block for receiving digital broadcasting, an antenna block for receiving GPS, or a hybrid antenna block thereof disposed on one surface of the substrate; And a low noise amplifier (LNA) disposed on the other surface of the substrate to face the antenna block.

The portable RF receiver assembly of the present invention blocks the propagation path of electromagnetic waves existing between the printed circuit board and the antenna by the electromagnetic shielding bracket and provides a common grounding portion for the printed circuit board and the antenna. Since the reception sensitivity of the antenna can be improved by blocking transmission and suppressing the generation of noise, it is possible to apply the built-in antenna.

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

The embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art, and the following examples can be modified in various other forms, and the scope of the present invention is It is not limited to an Example. In the drawings, the thickness or size of each component is exaggerated for convenience and clarity of description, and the same reference numerals refer to the same elements in the drawings.

2 is an exploded perspective view of a first time point A showing an assembly 1000 for a portable RF receiver according to an embodiment of the present invention. 3 is an exploded perspective view of a second time point B illustrating the assembly 1000 for the portable RF receiver of FIG. 2. 2 and 3, the assembly 1000 for a portable RF receiver includes an electromagnetic shielding bracket 100, a display panel 200, a first printed circuit board 300, an antenna 400, and a housing accommodating them. (See 500 of Figs. 5A and 5B).

The electromagnetic shielding bracket 100 protrudes from the first surface 101, the edges of the second surface 102 and the first surface 101 and the second surface 102 opposite to the first surface 101. And a third surface 103 forming an electromagnetic shielding film of a predetermined height. FIGS. 2 and 3 show an electromagnetic shielding film protruding from an edge of both the first surface 101 and the second surface 102. However, in consideration of the electromagnetic wave generation source and the transmission path, the shielding film may be formed to protrude only to one of the first surface 101 and the second surface 102.

In the electromagnetic shielding bracket 100, an electromagnetic shielding function may be performed by coating a conductive material on the first surface 101, the second surface 102, and the third surface 103. Accordingly, the first surface 101, the second surface 102 and the third surface 103 of the electromagnetic shielding bracket 100 respectively block the propagation path of the electromagnetic wave to reduce noise, in particular induction noise. It is possible to provide an isolation region. If printed circuit boards 202 and 300 are mounted on these surfaces 101, 102 and 103 as a noise source or devices susceptible to noise, noise or signal interference problems may occur between printed circuit boards arranged on different surfaces. Can be eliminated.

In addition, the electromagnetic shielding bracket 100 may provide a common ground for the circuit of the portable RF receiver. Noise may also occur when the ground points of the electronic components mounted on the printed circuit boards 202 and 300 constituting the portable RF receiver are different. Electromagnetic shielding bracket 100 according to an embodiment of the present invention is a conductive material on the first surface 101, the second surface 102 and the third surface 103, for example, these surfaces (101, 102, Coated entirely on 103 may be electrically connected to provide a common ground portion. Accordingly, the first printed circuit board 300, the second printed circuit board 202, and the antenna 400, which will be described later, may act as a common ground point to block generation of noise due to a voltage difference between the ground points. Hereinafter, the noise blocking function of the electromagnetic shielding bracket 100 will be described in detail with respect to the relationship with other components mounted on the surfaces 101, 102, 103 of the electromagnetic shielding bracket 100.

On the first surface 101 of the electromagnetic shielding bracket 100, a display panel 200 including a display element 201 such as a liquid crystal element or an organic light emitting diode is disposed. In the display panel 200 according to the exemplary embodiment of the present invention, a state in which the second printed circuit board 202 on which the driving device 202b is mounted, such as the driver IC of the display device 201, is combined with the display device 201. The furnace is disposed on the first surface 101 of the electromagnetic shielding bracket 100. The second printed circuit board 202 equipped with the driver IC which is a high frequency device is a noise source for the devices mounted on the adjacent antenna 400 or the first printed circuit board 300, but the second printed circuit board ( The noise problem may be improved by blocking the propagation path of the electromagnetic waves emitted from the 202 by the first surface 101 and the third surface 103 of the electromagnetic shielding bracket 100.

The display panel 200 may further include a conductive frame 203 that receives an edge portion of the second printed circuit board 202 and is coupled to the electromagnetic shielding bracket 100. For example, when a ground electrode (not shown) is formed at an edge of the second printed circuit board 202, and the ground electrode and the conductive frame 203 are in contact with each other to maintain a conducting state, the electromagnetic shielding bracket 100 ) May provide a ground portion to the second printed circuit board 202 by contacting the conductive frame 203.

Alternatively, the first ground electrode pattern 202a is formed on the bottom surface of the second printed circuit board 202, and the first ground electrode pattern 202a is formed on the first surface 101 of the electromagnetic shielding bracket 100. The common ground portion may be provided to the second printed circuit board 202 by forming the second ground electrode pattern 101a that matches the second ground electrode pattern 101a. For example, the second ground electrode pattern 101a has the same shape as the first ground electrode pattern 202a protruding from the first surface 101 and formed on the second printed circuit board 202 as shown. As the second printed circuit board 202 and the electromagnetic shielding frame 100 are in close contact with each other, the first ground electrode pattern 202a and the second ground electrode pattern 101a may be electrically contacted with each other. In addition, a conductive path pad 150, for example, a conductive material coated sponge is disposed between the second printed circuit board 202 and the first surface 101 of the electromagnetic shielding bracket 100 to provide a ground path. At the same time, the ground area can be increased to increase the noise improvement effect.

The first printed circuit board 300 is disposed on the second surface 102 of the electromagnetic shielding bracket 100. As shown in FIG. 3, the first printed circuit board 300 may include a control central information processing unit, a memory unit for storing data, a bus for signal input and output, a speaker, and various video and audio signals on the front surface 302. A printed circuit board like the main board on which an output port is mounted. In addition, on the first printed circuit board 300, the antenna unit 61 of the broadcast receiving device module (60 of FIG. 1) such as the DMB and the DB and / or the antenna unit 71 of the GPS receiving device module 70 may be disposed. The remaining components except for the decoders 62 and 72 may be disposed. These elements disposed on the front surface 302 of the first printed circuit board 300 may also serve as a noise source. In this case, the second surface 102 and the third surface 103 of the electromagnetic shielding bracket 100 may block the propagation path of the electromagnetic wave emitted from the first printed circuit board 300 to improve the noise problem. .

In addition, a third ground electrode pattern 301a may be formed on the bottom 301 of the first printed circuit board 300. On the second surface 102 of the electromagnetic shielding bracket 100, a fourth ground electrode pattern 102a is formed to match the third ground electrode pattern 301a, so that the common ground portion is formed on the first printed circuit board 300. Can provide. For example, a third ground electrode pattern protruding from the second surface 102 on the second surface 102 of the electromagnetic shielding bracket and formed on the bottom surface 301 of the first printed circuit board 300 ( By forming the fourth ground electrode pattern 102a having the same shape as that of 301a, a common ground portion may be provided to the first printed circuit board 300.

In the portable RF receiver assembly 1000 of the present embodiment, the first surface of the electromagnetic shielding bracket 100 for transmitting signals and / or power between the first printed circuit board 300 and the second printed circuit board 202. An opening 104 is formed in the 101 and the second surface 102, and is coupled to the first printed circuit board 300 and the second printed circuit board 202 via the opening 104. Connection portions 202c and 300c may be disposed. Connections 202c and 300c may be mounted on, for example, printed circuit boards 202 and 300 and as is well known in the art, a socket 300c having a plurality of pin contacts aligned therein and these pin contacts Pin connector 202c that is electrically connected by contacting the. When the connection parts 202c and 300c are used to transmit signals and power between the first printed circuit board 300 and the second printed circuit board 202, noise is more likely to be generated than when connected using a long conductor. At the same time there is an advantage that can maintain the shielding effect of the electromagnetic shielding bracket 100 at the same time.

The antenna 400 is mounted on the third surface 103 of the electromagnetic shielding bracket 100. 4 is a perspective view illustrating the antenna 400 illustrated in FIGS. 2 and 3. As shown in FIG. 4, the antenna 400 is disposed on the lower surface of the substrate 403 to face the substrate 401, the antenna block 402 disposed on the upper surface of the substrate 401, and the antenna block 402. The low noise amplifier 403 may be disposed. In this case, the antenna block 402 may be an antenna block for receiving digital broadcasts such as a DMB and a DB, a GPS receiving antenna block, or a hybrid antenna block thereof. The antenna 400 may further include a conductive line 405 for transmitting an output signal of the low noise amplifier 403. It is preferable that the conducting wire 405 is a coaxial cable provided with an electromagnetic wave shield.

The antenna 400 is the most vulnerable to noise, and when external noise is transmitted to the antenna 400, the low noise amplifier 403 may amplify the noise to reduce reception quality. Accordingly, the antenna 400 according to the embodiment of the present invention may further include an electromagnetic shielding shield 404 that accommodates the entire low noise amplifier 403 and is fixed to the lower surface of the substrate 401.

Referring again to FIGS. 2 and 3, in order to mount such an antenna 400, a fourth surface (on the third surface 103 of the electromagnetic shielding bracket 100 in the assembly for portable RF receiver 1000) An antenna mounting unit 110 for shielding electromagnetic waves having a 111 may be provided. The fourth surface 111 may be inclined at a predetermined angle with respect to the third surface 103, which angle may be determined in consideration of the general mounting angle of the portable RF receiver.

In addition, the fourth surface 111 may be coated with a conductive material such as metal so as to block a propagation path of noise caused by electromagnetic waves, and the electromagnetic shielding antenna mounting unit 110 is integrated with the electromagnetic shielding bracket 100. It may be formed as. In addition, the fourth surface 111 may be formed to be biased toward the surface of any one of the first surface 101 and the second surface 102 of the electromagnetic shielding bracket 100 in consideration of the propagation path of the electromagnetic waves. have.

The low noise amplifier 403 or the electromagnetic shielding shield 404 may be coupled to each other with the fourth surface 111 by bonding means 450 such as conductive paste or conductive film. When the electromagnetic shielding shield 403 is made of a conductive material such as metal, the fourth surface 111 can provide a common ground for the antenna 400. The conductive film increases the efficiency of the assembly process by facilitating the coupling of the antenna 400 and the electromagnetic shielding bracket as compared with the conductive paste.

5A and 5B are photographs illustrating a front portion and a rear portion of a portable RF receiver having a built-in antenna according to an embodiment of the present invention, respectively.

5A and 5B, the housing 500 accommodates the electromagnetic shielding bracket 100, the display panel 201, the first printed circuit board 300, and the antenna 400 shown in FIGS. 2 and 3. In addition, the display unit of the display panel 201 is exposed to implement a portable RF receiver having a built-in antenna 500b. On the outer surface of the housing 500, various function keys 601 such as a power key, a channel key, a sound output unit 602, and an external signal input / output port unit 603 may be formed. The housing 500 may include a support 550 capable of supporting a portable RF receiver on the rear surface, and the support 550 may be designed to be detachable. A portion of the support 550 in contact with the ground may be provided with a rubber pad 550a for preventing slipping.

In an assembly for a portable RF receiver according to an embodiment of the present invention, one of a digital broadcasting reception antenna such as DM and DA and an antenna block for GPS reception are mounted as a built-in on the third surface of the electromagnetic shielding bracket. It is apparent that the other one can be manufactured separately externally. In addition, in an assembly for a portable RF receiver according to an embodiment of the present invention, one or more other printed circuit boards, together with a first printed circuit board and a second printed circuit board, are formed on the first surface and the second surface of the electromagnetic shielding bracket. It is also obvious that it can be arranged.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and alterations are possible within the scope without departing from the technical spirit of the present invention, which are common in the art. It will be apparent to those who have knowledge.

The portable RF receiver assembly of the present invention can block the propagation path of noise due to the propagation of electromagnetic waves between each printed circuit board and the antenna by the electromagnetic shielding bracket, and provide a common grounding portion for the printed circuit board and the antenna. It is possible to suppress the occurrence of noise by removing the voltage difference due to the difference of. This improves the reception sensitivity of the antenna, thereby enabling application of the built-in antenna.

In addition, the assembly for the portable RF receiver of the present invention can be assembled by bonding the antenna on the third surface or the fourth surface of the electromagnetic shielding bracket, thereby providing a portable RF receiver with improved productivity compared to a conventional external antenna. The built-in antenna can further enhance the durability and portability of the portable RF receiver as compared to the external antenna.

Claims (21)

Electromagnetic shielding bracket comprising a first surface, a second surface facing the first surface and a third surface protruding from an edge of at least one of the first and second surfaces to form an electromagnetic shielding film of a predetermined height. ; A display panel mounted on the first surface; A first printed circuit board mounted on the second surface; One or more antennas mounted on the third surface; And And a housing configured to receive the electromagnetic shielding bracket, the first printed circuit board, and the antenna, and to expose a display unit of the display panel. The method of claim 1, And said first surface, said second surface and said third surface are coated with a conductive material. The method of claim 2, wherein the conductive material And electrically connecting the first surface, the second surface, and the third surface to provide a common ground for the display panel, the first printed circuit board, and the antenna. The display panel of claim 1, wherein the display panel comprises: An assembly for a portable RF receiver in which a display element and a second printed circuit board on which the drive element of the display element is mounted are combined. The display panel of claim 4, wherein the display panel comprises: And a conductive frame receiving the edge portion of the second printed circuit board and coupled to the electromagnetic shielding bracket. The method of claim 4, wherein The first ground electrode pattern is formed on the bottom surface of the second printed circuit board, the portable RF receiver for forming a second ground electrode pattern matching the first ground electrode pattern on the first surface of the electromagnetic shielding bracket assembly. The method of claim 4, wherein And a conductive buffer pad (150) is inserted between the second printed circuit board and the first surface of the electromagnetic shielding bracket. The method of claim 1, An assembly for a portable RF receiver in which any one or both of a module of a digital broadcast receiver and a GPS receiver module for receiving a signal from the antenna on the first printed circuit board is mounted. The method of claim 1, The third ground electrode pattern is formed on the bottom surface of the first printed circuit board, the portable RF receiver for forming a fourth ground electrode pattern to match the third ground electrode pattern on the second surface of the electromagnetic shielding bracket assembly. The method of claim 4, wherein Connections for any one or both of signals and power transmission are formed on the first printed circuit board and the second printed circuit board, and the connection portions are the first surface and the second surface of the electromagnetic shielding bracket. An assembly for portable RF receivers connected via an opening therethrough. The method of claim 1, And an electromagnetic shielding antenna mount disposed on the third surface and providing a fourth surface for mounting the antenna. 12. The method of claim 11, wherein the fourth surface is An assembly for a portable RF receiver inclined at an angle with respect to the third surface. The method of claim 11, And a surface of the antenna mount including the fourth surface is coated with a conductive material. The method of claim 11, wherein the electromagnetic shielding antenna mounting portion, Portable RF receiver assembly formed integrally with the electromagnetic shielding bracket. 12. The method of claim 11, wherein the fourth surface is An assembly for a portable RF receiver further biased toward either surface of the first surface and the second surface. The method of claim 11, wherein the antenna unit, Board; An antenna block disposed on one surface of the substrate; And And a low noise amplifier (LNA) disposed on the other surface of the substrate to face the antenna block. The method of claim 16, The antenna block is an assembly for a portable RF receiver, the antenna block for receiving digital broadcast, the GPS receiving antenna block or a hybrid antenna block thereof. The method of claim 16, wherein the antenna unit, And an electromagnetic shielding shield receiving the low noise amplifier and fixed to the other surface of the substrate. The method of claim 18, wherein the electromagnetic shielding shield, An assembly for portable RF reception coupled by a conductive adhesive film on the third surface or the fourth surface. The method of claim 18, wherein the electromagnetic shielding shield, Portable RF receiving assembly made of conductive material. The method of claim 1, wherein the antenna unit, Board; An antenna block disposed on one surface of the substrate; And And a low noise amplifier disposed on the other surface of the substrate so as to face the antenna block.

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