CN106876874B - Circuit board structure and terminal - Google Patents

Abstract

The invention provides a circuit board structure which comprises a first end, a second end, a first circuit board, a second circuit board, a baseband chip, a diversity module and a diversity antenna feed point, wherein the first end and the second end are opposite, the first circuit board is arranged along the first end, the second circuit board is provided with a radio frequency transceiver, a main set module and a main set antenna feed point, the baseband chip is electrically connected with the radio frequency transceiver, the radio frequency transceiver is electrically connected with the diversity module and the main set module, the diversity module is electrically connected with the diversity antenna feed point and is used for providing feed current for the diversity antenna feed point, and the main set module is electrically connected with the main set antenna feed point and is used for providing feed current for the main set antenna feed point. In addition, the invention also provides a terminal. The circuit board structure and the terminal can reduce transmission loss and improve antenna performance by shortening the distance from the transmission of radio frequency signals from the main set module to the feeding of the main set antenna.

Description

Circuit board structure and terminals

Technical field

The present invention relates to the field of communication technology, and in particular, to a circuit board structure and a terminal.

Background technique

At present, in the layout scheme of radio frequency modules in terminals such as mobile phones and tablet computers, one is to place the main module and the baseband chip on the circuit board at the top of the terminal, and then the radio frequency signal is output from the main module through the radio frequency cable. Transmitted to the antenna feed point located at the bottom of the terminal, as shown in Figure 1; the other is to make the top circuit board into an L shape, and place the main collector module on the side of the L-shaped circuit board facing the bottom of the terminal, and the main collector module outputs The RF signal still needs to be transmitted through the RF cable to the antenna feed point located at the bottom of the terminal, as shown in Figure 2. In the above two solutions, when the radio frequency signal is transmitted from the main module to the antenna feed point, it needs to be realized through a long radio frequency cable. The use of radio frequency cable will undoubtedly bring a certain insertion loss and affect the terminal antenna. RF transceiver performance, and at the same time, it will also increase the production cost of the terminal.

Contents of the invention

In view of the above problems existing in the prior art, embodiments of the present invention provide a circuit board structure and a terminal to reduce the distance between the main set module and the main set antenna feed point in the circuit board structure, thereby reducing the radio frequency signal from the main set. The loss between the module and the main antenna feed point improves the terminal’s radio frequency transceiver performance.

A first aspect of an embodiment of the present invention provides a circuit board structure, including an opposite first end and a second end, a first circuit board disposed along the first end, and a second circuit board disposed along the second end. , the first circuit board is provided with a baseband chip, a diversity module and a diversity antenna feed point, the second circuit board is provided with a radio frequency transceiver, a main module and a main antenna feed point, the baseband chip is connected to the The radio frequency transceiver is electrically connected, the radio frequency transceiver is electrically connected to the diversity module and the main module, the diversity module is electrically connected to the diversity antenna feed point, and is used to provide the diversity antenna feed point with Feed current, the main collector module is electrically connected to the main collector antenna feed point, and is used to provide feed current to the main collector antenna feed point.

In one embodiment, the circuit board structure further includes a third circuit board, the first circuit board is connected to the second circuit board through the third circuit board, and the radio frequency transceiver is arranged on the The radio frequency signal line on the third circuit board is electrically connected to the diversity module, and is electrically connected to the baseband chip through a signal bus.

In one embodiment, the third circuit board is connected to the same side of the first circuit board and the second circuit board, and together with the first circuit board and the second circuit board, forms a half Frame circuit board structure.

A second aspect of the embodiment of the present invention provides a terminal, including a first circuit board and a second circuit board. The first circuit board is disposed along the top end of the terminal, and the second circuit board is disposed along the bottom end of the terminal. The first circuit board is provided with a baseband chip, a diversity module and a diversity antenna feed point. The second circuit board is provided with a radio frequency transceiver, a main module and a main antenna feed point. The baseband chip is connected to the main antenna feed point. The radio frequency transceiver is electrically connected to the diversity module and the main module, and the diversity module is electrically connected to the diversity antenna feed point for feeding the diversity antenna. To provide a feed current, the main collector module is electrically connected to the main collector antenna feed point, and is used to provide feed current to the main collector antenna feed point.

In one embodiment, the terminal further includes a third circuit board, the first circuit board is connected to the second circuit board through the third circuit board, and the radio frequency transceiver is arranged on the third circuit board. The radio frequency signal lines on the three circuit boards are electrically connected to the diversity module, and are electrically connected to the baseband chip through the signal bus.

In one embodiment, the third circuit board is connected to the same side of the first circuit board and the second circuit board, and together with the first circuit board and the second circuit board, forms a half Frame-shaped circuit board structure, the semi-frame circuit board structure encloses a half enclosed space for accommodating the battery of the terminal.

In one implementation, the third circuit board is a flexible circuit board.

In one embodiment, the terminal further includes a main antenna and a diversity antenna. The main antenna is arranged along the bottom end of the terminal and is electrically connected to the main antenna feed point for transmitting and receiving. The diversity antenna is arranged along the top of the terminal and is electrically connected to the diversity antenna feed point for receiving the diversity signal.

In one implementation, the first circuit board is further provided with a GPS module and a Wi-Fi module. The GPS module electrically communicates with the radio frequency transceiver through a radio frequency signal line arranged on the third circuit board. connection, the Wi-Fi module is electrically connected to the baseband chip.

In one implementation, the terminal further includes a GPS antenna and a Wi-Fi antenna. The GPS antenna is provided along the top of the terminal and is electrically connected to the GPS module for receiving GPS positioning signals. The Wi-Fi antenna is arranged along the top of the terminal and is electrically connected to the Wi-Fi module for sending and receiving Wi-Fi signals.

The circuit board structure can effectively reduce the transmission of radio frequency signals output by the main module to the main module by arranging the radio frequency transceiver and the main module on the second circuit board located at the bottom of the terminal. The distance between the feed point of the collector antenna can be reduced, thereby reducing the loss of radio frequency signals from the main collector module to the feed point of the main collector antenna, improving the transmission efficiency of radio frequency signals and improving the radio frequency transceiver performance of the terminal.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic diagram of a first layout scheme of a radio frequency module of a terminal in the prior art;

Figure 2 is a schematic diagram of the second layout scheme of the radio frequency module of the terminal in the prior art;

Figure 3 is a schematic structural diagram of a circuit board structure provided by an embodiment of the present invention;

Figure 4 is a first structural schematic diagram of a terminal provided by an embodiment of the present invention;

Figure 5 is a second structural schematic diagram of a terminal provided by an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

For ease of description, spatially relative terms such as “under,” “below,” “lower,” “above,” “upper,” etc. may be used herein to describe an element as shown in the figures. or the relationship of a feature to another element(s) or features. It will be understood that when an element or layer is referred to as being "on," "connected to" or "coupled to" another element or layer, it can be directly on, directly on, or directly on the other element or layer. is connected or coupled to another element or layer or intervening elements or layers may be present.

It will be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. Further, when used in this specification, the terms "comprises" and/or "comprises" indicate the presence of stated features, integers, steps, elements and/or components but do not exclude one or more other features, integers, The presence or addition of steps, elements, components and/or combinations thereof.

Please refer to Figure 3. In one embodiment of the present invention, a circuit board structure 100 is provided, including an opposite first end 101 and a second end 103, a first circuit board 110 disposed along the first end 101, and a first circuit board 110 disposed along the first end 101. The second end 103 is provided with a second circuit board 130 . The first circuit board 110 is provided with a baseband chip 111, a diversity module 113 and a diversity antenna feed point 115, and the second circuit board 130 is provided with a radio frequency transceiver 131, a main module 133 and a main antenna feed point 135. . The baseband chip 111 is electrically connected to the radio frequency transceiver 131 , and the radio frequency transceiver 131 is electrically connected to the diversity module 113 and the main module 133 . The diversity module 113 is electrically connected to the diversity antenna feed point 115 and is used to provide feed current to the diversity antenna feed point 115 . The main collector module 133 is electrically connected to the main collector antenna feed point 135 and is used to provide feed current to the main collector antenna feed point 135 . It can be understood that the number of the diversity antenna feed point 115 and the main antenna feed point 135 may be one or more.

In this embodiment, the circuit board structure 100 can be applied to terminals such as mobile phones and tablet computers. The first circuit board 110 may be disposed along the top end of the terminal, and the second circuit board 130 may be disposed along the bottom end of the terminal. The first circuit board 110 and the second circuit board 130 are spaced apart from each other, and the battery of the terminal may be disposed between the first circuit board 110 and the second circuit board 130 . It can be understood that the top end of the terminal is the end where the earpiece is disposed, and the bottom end of the terminal is the end where the main conversation microphone is disposed.

In one embodiment, the circuit board structure 100 further includes a third circuit board 150. The first circuit board 110 is connected to the second circuit board 130 through the third circuit board 150. The radio frequency transceiver The device 131 is electrically connected to the diversity module 113 through a radio frequency signal line arranged on the third circuit board 150, and is electrically connected to the baseband chip 111 through a signal bus 151. The signal bus 151 may be arranged on the third circuit board 150 or may be arranged separately on a flexible circuit board.

In one embodiment, the third circuit board 150 is connected to the same side of the first circuit board 110 and the second circuit board 130, and is connected to the first circuit board 110 and the second circuit board 130. Together, the boards 130 form a half-frame circuit board structure. The battery of the terminal can be accommodated in a semi-enclosed space surrounded by the semi-frame circuit board structure. In this embodiment, the width of the third circuit board 150 ranges from approximately 3.5 mm to 4 mm.

In one embodiment, the diversity antenna feed point 115 may be disposed on a side of the first circuit board 110 facing the top of the terminal, that is, along the first end 101 of the circuit board structure 100. A diversity antenna is connected to receive a diversity signal through the diversity antenna. The main antenna feed point 135 may be provided on the side of the second circuit board 130 facing the bottom end of the terminal, that is, along the second end 103 of the circuit board structure 100, for connecting the main antenna, to transmit and receive main set signals through the main set antenna.

It can be understood that by disposing the radio frequency transceiver 131 and the main set module 133 on the second circuit board 130 close to the bottom end of the terminal, the distance between the output of the main set module 133 and the main set antenna feed point can be effectively shortened. 135, the radio frequency signal output end of the main set module 133 can be directly connected to the main set antenna through the antenna shrapnel, so that there is no need to set up a radio frequency cable between the main set module 133 and the main set antenna feed point 135, which can avoid The insertion loss caused by the use of RF cables improves the over-the-air (OTA) test performance of the antenna.

At the same time, the radio frequency transceiver 131 and the diversity module 113 are connected through the radio frequency signal line on the third circuit board 150. Since the diversity antenna connected to the diversity module 113 is only used to receive diversity signals, the low noise amplifier ( Low Noise Amplifier (LNA) is placed close to the diversity antenna, and the insertion loss caused by the signal wiring between the LNA and the radio frequency transceiver 131 is offset by the LNA, thereby basically not affecting the reception performance of the diversity antenna. In this embodiment, by arranging the radio frequency transceiver 131 and the main set module 133 on the second circuit board 130 adjacent to the main set antenna, the radio frequency performance of the main set antenna of the terminal can be improved by about 1 dB.

In one embodiment, the first circuit board 110 is also provided with a GPS module 117 and a Wi-Fi module 119. The GPS module 117 communicates with all the radio frequency signal lines arranged on the third circuit board 150. The radio frequency transceiver 131 is electrically connected, and the Wi-Fi module 119 is electrically connected to the baseband chip 111 . The GPS module 117 is used to connect a GPS antenna to receive GPS positioning signals through the GPS antenna. The Wi-Fi module 119 is used to connect a Wi-Fi antenna to send and receive Wi-Fi signals through the Wi-Fi antenna.

Please refer to Figure 4. In one embodiment of the present invention, a terminal 200 is provided, including a first circuit board 210 and a second circuit board 230. The first circuit board 210 is disposed along the top of the terminal, and the third circuit board 210 is disposed along the top of the terminal. Two circuit boards 230 are provided along the bottom end of the terminal. The first circuit board 210 is provided with a baseband chip 211, a diversity module 213 and a diversity antenna feed point 215. The second circuit board 230 is provided with a radio frequency transceiver. 231. Main set module 233 and main set antenna feed point 235. The baseband chip 211 is electrically connected to the radio frequency transceiver 231. The radio frequency transceiver 231 is electrically connected to the diversity module 213 and the main set module 233. , the diversity module 213 is electrically connected to the diversity antenna feed point 215, and is used to provide feed current for the diversity antenna feed point 215, and the main module 233 is electrically connected to the main antenna feed point 235, It is used to provide feed current for the main antenna feed point 135 .

Wherein, the terminal can be a mobile phone, a tablet computer, etc. The first circuit board 210 and the second circuit board 230 may be two independent circuit boards, or they may be two areas on the same circuit board respectively close to the top and bottom of the terminal. The first circuit board 210 and the second circuit board 230 are spaced apart from each other, and they can be electrically connected through a high-speed signal bus.

In one embodiment, the terminal 200 further includes a third circuit board 250 , the first circuit board 210 is connected to the second circuit board 230 through the third circuit board 250 , and the radio frequency transceiver 231 The diversity module 213 is electrically connected through a radio frequency signal line arranged on the third circuit board 250 , and the baseband chip 211 is electrically connected through a signal bus 251 . Wherein, the signal bus 251 can be laid on the third circuit board 250, or can be laid separately on a flexible circuit board. In this embodiment, the width of the third circuit board 250 ranges from approximately 3.5 mm to 4 mm.

In one embodiment, the third circuit board 250 is connected to the same side of the first circuit board 210 and the second circuit board 230, and is connected to the first circuit board 210 and the second circuit board 230. The boards 230 together form a half-frame circuit board structure that encloses a half closed space for accommodating the battery of the terminal 200 (not shown). In one implementation, the third circuit board 250 may be a flexible circuit board.

In one embodiment, the terminal 200 further includes a main antenna 220 and a diversity antenna 240. The main antenna 220 is provided along the bottom end of the terminal and is electrically connected to the main antenna feed point 235. For transmitting and receiving main set signals, the diversity antenna 240 is arranged along the top of the terminal and is electrically connected to the diversity antenna feed point 215 for receiving diversity signals.

It can be understood that the diversity module 113 may include a diversity antenna filter (not shown) and a diversity antenna amplifier (not shown). The diversity antenna filter is used to filter out clutter in the diversity signal received by the diversity antenna. The diversity antenna amplifier is coupled between the diversity antenna filter and the radio frequency transceiver 131 for amplifying the filtered diversity signal, and transmitting the amplified diversity signal to the third circuit board 150 The radio frequency signal line is transmitted to the radio frequency transceiver 131.

The main set module 133 may include a main set antenna filter (not shown) and a main set antenna amplifier (not shown). The main set antenna filter is used to filter out the main set signal received by the main set antenna. Clutter, the main set antenna amplifier is coupled between the main set antenna filter and the radio frequency transceiver 131, used to amplify the filtered main set signal, and the amplified main set signal is The radio frequency signal lines on the third circuit board 150 are transmitted to the radio frequency transceiver 131 .

It can be understood that the embodiment of the present invention does not limit the specific structural forms of the main antenna 220 and the diversity antenna 240. For example, both the main antenna 220 and the diversity antenna 240 may include multiple radiators, and the radiators may be antenna radiators independently provided inside the terminal or antenna radiation formed by multiplexing the metal frame of the terminal. body. The main antenna 220 and the diversity antenna 240 may be, but are not limited to, monopole antennas, loop antennas, inverted F-shaped antennas (IFA), planar inverted F-shaped antennas (Planar Inverted F-shaped). Antenna, PIFA) and other antenna forms.

In this embodiment, since the main antenna 220 is disposed on a side close to the bottom of the terminal 200, the distance between the main antenna 220 and the user's head can be increased when the terminal is in a call state, thereby increasing the distance between the main antenna 220 and the user's head. Reduce the radiation to the user's head, and at the same time reduce the impact of the head and hand holding on the antenna radiation performance during the call, improving the call signal quality of the terminal.

In one implementation, the first circuit board 210 is also provided with a GPS module 217 and a Wi-Fi module 219. The GPS module 217 communicates with all the other devices through radio frequency signal lines arranged on the third circuit board 250. The radio frequency transceiver 231 is electrically connected, and the Wi-Fi module 219 is electrically connected to the baseband chip 211. The terminal also includes a GPS antenna 260 and a Wi-Fi antenna 270. The GPS antenna 260 is provided along the top of the terminal and is electrically connected to the GPS module 217 for receiving GPS positioning signals. The Wi-Fi The antenna 270 is disposed along the top of the terminal and is electrically connected to the Wi-Fi module 219 for sending and receiving Wi-Fi signals. It can be understood that since both Bluetooth and Wi-Fi can work in the 2.4GHz frequency band, the Wi-Fi module 219 can also be reused as a Bluetooth module. Correspondingly, the Wi-Fi antenna 270 can also be reused as a Bluetooth antenna. .

In this embodiment, the top end of the terminal 200 is the end where the earpiece is disposed, and the bottom end of the terminal is the end where the main call microphone is disposed, that is, the end where the home button is disposed. As shown in Figure 5, 200 is the terminal, 201 is the earpiece, 202 is the top of the terminal, 203 is the main key, 204 is the bottom of the terminal, and 205 is the battery of the terminal. The positions of the first circuit board 210 , the second circuit board 230 and the third circuit board 250 relative to the top and bottom ends of the terminal 200 are shown in the dotted box in FIG. 5 . It can be understood that since the first circuit board 210, the second circuit board 230, the third circuit board 250 and the battery 205 are actually enclosed in the housing of the terminal 200, only the dotted lines are used in Figure 5. Indicate their relative position. For the positional relationship of the components on the first circuit board 210 , the second circuit board 230 and the third circuit board 250 and the positional relationship of the antennas of the terminal 200 , please refer to the relevant description in the embodiment shown in FIG. 4 , which will not be described again here.

By disposing the radio frequency transceiver 231 and the main module 233 on the second circuit board 230 located at the bottom of the terminal, the terminal 200 can effectively reduce the transmission of radio frequency signals output by the main module 233 to The distance of the main antenna feed point 235 reduces the loss of radio frequency signals from the main antenna module 233 to the main antenna feed point 235, which is beneficial to improving the transmission efficiency of radio frequency signals and improving the radio frequency transceiver performance of the terminal.

It can be understood that the above disclosures are only preferred embodiments of the present invention, and of course cannot be used to limit the scope of rights of the present invention. Those of ordinary skill in the art can understand all or part of the processes for implementing the above embodiments and implement them according to this disclosure. Equivalent changes made to the claims of an invention still fall within the scope of the invention.

Claims (6)

1. A circuit board structure, characterized in that it includes an opposite first end and a second end, a first circuit board arranged along the first end, and a second circuit board arranged along the second end, so The first circuit board is provided with a baseband chip, a diversity module and a diversity antenna feed point. The second circuit board is provided with a radio frequency transceiver, a main module and a main antenna feed point. The baseband chip and the radio frequency The transceiver is electrically connected, the radio frequency transceiver is electrically connected to the diversity module and the main module, the diversity module is electrically connected to the diversity antenna feed point, and is used to provide feed for the diversity antenna feed point current, the main collector module is electrically connected to the main collector antenna feed point, and is used to provide feed current to the main collector antenna feed point to reduce the distance between the main collector module and the main collector antenna in the circuit board structure. The distance between the antenna feed points; Wherein, the circuit board structure further includes a third circuit board, the first circuit board is connected to the second circuit board through the third circuit board, and the radio frequency transceiver is arranged on the third circuit board. The radio frequency signal line is electrically connected to the diversity module and electrically connected to the baseband chip through a signal bus; The radio frequency transceiver and the main set module are arranged on the second circuit board adjacent to the main set antenna, and the radio frequency signal output end of the main set module is directly connected to the main set antenna through an antenna spring; The radio frequency transceiver and the diversity module are connected through a radio frequency signal line on the third circuit board; the low noise amplifier in the diversity module is placed adjacent to the diversity antenna; Wherein, the third circuit board is connected to the same side of the first circuit board and the second circuit board, and together with the first circuit board and the second circuit board, forms a half frame circuit board structure ; The semi-frame circuit board structure encloses half of a closed space for accommodating batteries. 2. A terminal, characterized in that it includes a first circuit board and a second circuit board, the first circuit board is arranged along the top end of the terminal, and the second circuit board is arranged along the bottom end of the terminal, A baseband chip, a diversity module and a diversity antenna feed point are provided on the first circuit board. A radio frequency transceiver, a main set module and a main set antenna feed point are provided on the second circuit board. The baseband chip is connected to the main set antenna feed point. A radio frequency transceiver is electrically connected to the diversity module and the main module. The diversity module is electrically connected to the diversity antenna feed point and is used to provide feed for the diversity antenna feed point. Electric current, the main collector module is electrically connected to the main collector antenna feed point, and is used to provide feed current to the main collector antenna feed point to reduce the distance between the main collector module and the main collector in the circuit board structure. The distance between antenna feed points; Wherein, the terminal further includes a third circuit board, the first circuit board is connected to the second circuit board through the third circuit board, and the radio frequency transceiver is arranged on the third circuit board through The radio frequency signal line is electrically connected to the diversity module and electrically connected to the baseband chip through a signal bus; The radio frequency transceiver and the main set module are arranged on the second circuit board adjacent to the main set antenna, and the radio frequency signal output end of the main set module is directly connected to the main set antenna through an antenna spring; The radio frequency transceiver and the diversity module are connected through a radio frequency signal line on the third circuit board; the low noise amplifier in the diversity module is placed adjacent to the diversity antenna; Wherein, the third circuit board is connected to the same side of the first circuit board and the second circuit board, and together with the first circuit board and the second circuit board, forms a half frame circuit board structure , the semi-frame circuit board structure encloses a half enclosed space for accommodating the battery of the terminal. 3. The terminal according to claim 2, wherein the third circuit board is a flexible circuit board. 4. The terminal according to claim 2 or 3, characterized in that the main antenna is arranged along the bottom end of the terminal and is electrically connected to the feed point of the main antenna for transmitting and receiving the main antenna. The diversity antenna is arranged along the top of the terminal and is electrically connected to the diversity antenna feed point for receiving diversity signals. 5. The terminal according to claim 4, wherein a GPS module and a Wi-Fi module are further provided on the first circuit board, and the GPS module passes a radio frequency signal arranged on the third circuit board. The wire is electrically connected to the radio frequency transceiver, and the Wi-Fi module is electrically connected to the baseband chip. 6. The terminal according to claim 5, wherein the terminal further includes a GPS antenna and a Wi-Fi antenna, the GPS antenna is arranged along the top of the terminal and is electrically connected to the GPS module. For receiving GPS positioning signals, the Wi-Fi antenna is disposed along the top of the terminal and is electrically connected to the Wi-Fi module for sending and receiving Wi-Fi signals.