CN212727022U

CN212727022U - Frequency band compatible circuit and terminal

Info

Publication number: CN212727022U
Application number: CN202022086160.6U
Authority: CN
Inventors: 彭利中; 马媛
Original assignee: Shanghai Wingtech Electronic Technology Co Ltd
Current assignee: Shanghai Wingtech Electronic Technology Co Ltd
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2021-03-16
Anticipated expiration: 2030-09-21

Abstract

The utility model provides a frequency channel compatible circuit and terminal, this frequency channel compatible circuit includes: the antenna comprises a transceiver, a compatible connector and a duplexer, wherein the transceiver further comprises a first receiving port and a first transmitting port; the first receiving port is used for receiving signals with frequencies in a first frequency band; the first transmitting port is used for transmitting signals with the frequency in the second frequency band; the compatible connector is used for transmitting the signals, which are transmitted by the duplexer and have the frequency within the first frequency band, to the transceiver when the compatible connector is connected with the first receiving port; when the first transmitting port is connected, the signals with the frequency in the second frequency band transmitted by the transceiver are sent to the duplexer. The utility model provides a frequency channel compatible circuit can realize the connection of transceiver and a duplexer through a compatible connector, when realizing that the frequency channel is compatible, has reduced manufacturing cost, reduces device layout area.

Description

Frequency band compatible circuit and terminal

Technical Field

The utility model relates to the field of electronic technology, particularly, relate to a frequency channel compatible circuit and terminal.

Background

With the rapid development of modern communication technology, more and more frequency bands are supported by communication equipment, and frequency band compatibility becomes necessary, but the number of receiving ports of a transceiver is limited, and the area of a PCB (printed circuit board) is short, so that the realization of frequency band compatibility on the premise of saving cost is difficult.

At present, the common pad design of the surface acoustic wave filter and the duplexer is usually utilized to realize the receiving and transmitting of signals in different frequency bands, but the mode increases the adjusting space of the layout of a PCB (printed circuit board) ornament, and a plurality of wire change-over switch ports are needed, so that the design cost is increased.

Therefore, how to promote the adjustment space of the layout of the ornament, reduce the ports of the antenna switch, save the cost, and is a technical problem to be solved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a frequency channel compatible circuit and terminal can promote the accommodation space of goods of furniture for display rather than for use overall arrangement, reduces the antenna change over switch port, saves the cost.

The utility model provides a technical scheme as follows:

the embodiment of the application provides a frequency band compatible circuit, including: a transceiver, a duplexer, and a compatible connector; the transceiver comprises a first receive port and a first transmit port; the first receiving port is used for receiving signals with frequencies within a first frequency band; the first transmitting port is used for transmitting signals with frequencies in a second frequency band; the second frequency band comprises the first frequency band; the compatible connector is used for transmitting the signal of the frequency transmitted by the duplexer within the first frequency band to the transceiver when being connected with the first receiving port; and when the first transmitting port is connected, the signal of the frequency transmitted by the transceiver in the second frequency band is sent to the duplexer.

In one embodiment, the band compatible circuit further comprises a controller; the compatible connector is a change-over switch; the controller is connected with the selector switch; the change-over switch comprises a public end, a first selection end and a second selection end which are connected; the common terminal is connected with the duplexer; the first selection end and the first receiving port; the second selection end is connected with the first transmission port; the controller is used for outputting a control signal to the selector switch; the switch is configured to switch between a transmission path and a reception path according to the control signal, where the transmission path is a path between the first transmission port and the second selection terminal, and the reception path is a path between the first reception port and the first selection terminal.

In one embodiment, the control signal comprises a first control signal and a second control signal; the controller is used for outputting a first control signal to the change-over switch when the signal of the transmission frequency of the duplexer in the first frequency band is determined; when the transceiver is determined to transmit a signal with the frequency within the second frequency band, outputting a first control signal to the switch; the switch is used for switching to the receiving path when receiving the first control signal; and when the second control signal is received, switching to the transmitting path.

In one embodiment, the compatible connector of the frequency band compatible circuit is a resistor.

In one embodiment, the band compatible circuit further comprises a signal amplifier; one end of the signal amplifier is connected with the transmitting port, and the other end of the signal amplifier is connected with the compatible connector; the signal amplifier is used for carrying out power amplification on the signals of the transceiver with the transmitting frequency in the second frequency band.

In one embodiment, the band compatible circuit further comprises an antenna switch; the antenna switch comprises at least one antenna switching port, and the antenna switching port is connected with the duplexer; the antenna switch is configured to receive, through the antenna switching port, a signal having a frequency in the first frequency band when the compatible connector is connected to the first receiving port; and when the compatible connector is connected with the first transmitting port, transmitting the signal with the second frequency band through the antenna switching port.

In one embodiment, the antenna switch is connected to an antenna of the terminal.

In one embodiment, the transceiver further comprises a second receive port; the duplexer is connected with the second receiving port; and the second receiving port is used for receiving the signal which is transmitted by the duplexer and has the frequency in the third frequency band.

In one embodiment, the number of the duplexers is one.

The embodiment of the application provides a terminal, which comprises an antenna, wherein the terminal comprises a frequency band compatible circuit in any one of the embodiments of the application; the frequency band compatible circuit is connected with the antenna.

The utility model provides a beneficial effect at frequency channel compatible circuit and terminal is: can realize the connection of transceiver and a duplexer through a compatible connector, promote the accommodation space of overall arrangement goods of furniture for display rather than for use when realizing that the frequency channel is compatible, reduce antenna change over switch port, reduce manufacturing cost.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic diagram of a conventional design of a frequency band compatible circuit;

fig. 2 is a schematic structural diagram of a frequency band compatible circuit provided in an embodiment of the present invention;

FIG. 3 is a schematic diagram of a band-compatible circuit according to another embodiment;

FIG. 4 is a schematic diagram of a band-compatible circuit according to another embodiment;

FIG. 5 is a schematic diagram of a band-compatible circuit according to another embodiment;

FIG. 6 is a block diagram of a band-compatible circuit according to another embodiment;

FIG. 7 is a block diagram of a band-compatible circuit according to another embodiment;

fig. 8 is a schematic structural diagram of a terminal according to an embodiment of the present invention.

Icon: 101-a transceiver; 1011-a first receiving port; 1012-first transmit port; 1013-a second receiving port; 102-a compatible connector; 102 a-a diverter switch; 102 a-1-a first selection terminal; 102 a-2-a second selection terminal; 102 a-3-common; 102 b-resistance; 103-a duplexer; 104-a controller; 105-a signal amplifier; 106-antenna switch; 1061-antenna switching port; 20-a terminal; 10-band compatible circuits; 21-antenna.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that the products of the present invention are conventionally placed in, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are merely for convenience of description of the present invention and to simplify the description, but do not indicate or imply that the equipment or components that are referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

With the rapid development of mobile communication technology, more and more frequency bands need to be supported by communication equipment, and in order to make each frequency Band distinguish transmission and reception by different frequencies, a duplexer needs to be adopted in a mobile communication terminal to realize the compatibility of duplex communication frequency bands. If one mobile communication terminal needs to support a plurality of frequency bands, a plurality of sets of transceiver circuits need to be arranged on the circuit for support, and even if a product required by a certain market is only a single frequency band in some cases, a design scheme of the plurality of frequency bands needs to be reserved in the mobile communication terminal so as to meet possible requirements of other markets.

In order to support the transceiving requirements of signals in multiple frequency bands, as shown in fig. 1, fig. 1 is a schematic diagram of a conventional design of a frequency band compatible circuit, and a circuit compatible with two frequency bands is taken as an example for description. In fig. 1, the two frequency bands are denoted by band28A and band29, respectively.

band29 only receives downlink signals from base stations to terminals and no uplink signals. band28A has both uplink and downlink transmit signals. The downstream receiving frequency range of band29 is 717MHZ-728 MHZ. The frequency range of the band28A is 703MHZ-788MHZ, wherein the frequency range of the downlink receiving signal is 758MHZ-788MHZ, the frequency range of the uplink transmitting signal of the band28A is 703MHZ-733MHZ, and the frequency range includes B29. The Receive RX (Receive) path of the band29 can multiplex the Transmit TX (Transmit) path of the band28A from the operating frequency perspective.

For the signal with the frequency band of 28 band28A, when the signal needs to be transmitted, the transmitting port (B28A _ TX) of the band28A of the transceiver outputs the transmitting signal with the frequency within 703MHZ-733MHZ, and the transmitting signal is sent to the radio frequency amplifier for amplifying the transmitting signal; then, the transmission signal output by the power amplifier PA1 is transmitted to the band28A transceiver port (B28A _ TRX) of the antenna switch module through the duplexer, and then is sent to the antenna through the antenna switch module, and finally is transmitted to the outside through the antenna. When a receiving signal transmitted through the mobile communication network needs to be received, the signal with the frequency of 703MHZ-788MHZ is received through the antenna, then the signal is transmitted to the duplexer through the band28A transceiving port (B28A _ TRX) of the antenna switch module, and the receiving signal with the frequency range of 758MHZ-788MHZ is obtained after being filtered by the duplexer and is transmitted to the transceiver for processing.

For signals with a band29, when receiving signals transmitted through a mobile communication network, the signals with a frequency in a 717MHZ-728MHZ band are received through an antenna, transmitted to a Surface Acoustic Wave (SAW) through a band29 receiving port (B29_ RX) of an antenna switch module, and transmitted to a band29 main receiving port (PRX _ B29) of a transceiver through the SAW.

The circuit shown in fig. 1 utilizes the design of the common bonding pad of the surface acoustic wave filter and the duplexer to realize the receiving and transmitting of signals of different frequency bands, and the receiving and transmitting circuit layout space which is doubled in the circuit needs to be reserved by the design mode, so that the miniaturization design of the mobile terminal is not facilitated, the adjusting space of the layout of the PCB ornament is increased, a plurality of wire change-over switch ports are needed, and the design cost is increased.

In order to solve the technical problem, the utility model provides a frequency channel compatible circuit, its core lies in: connect transceiver and a duplexer through a compatible connector, realize that frequency band28A is compatible with band29, can promote the accommodation space of overall arrangement goods of furniture for display rather than for use, reduce antenna change over switch port, save the cost.

In an embodiment, please refer to fig. 2 for easy understanding, fig. 2 is a schematic structural diagram of a frequency band compatible circuit according to the present invention, and the frequency band compatible circuit 10 includes: a transceiver 101, a compatible connector 102, and a duplexer 103. The transceiver 101 further comprises a first receiving port 1011 and a first transmitting port 1012; the first receiving port 1011 is configured to receive signals with frequencies in a first frequency band; the first transmission port 1012 is used for transmitting signals with frequencies in a second frequency band; the second frequency band includes a first frequency band, for example: the first frequency band is the frequency band 717MHZ-728MHZ of the received signal of the band29, and the second frequency band is the frequency band 703MHZ-733MHZ of the transmitted signal of the band 28A.

The compatible connector 102 is configured to, when connected to the first receiving port 1011, send a signal transmitted by the duplexer and having a frequency within the first frequency band to the transceiver 101; when connected to the first transmission port 1012, signals transmitted by the transceiver 101 in the second frequency band are transmitted to the duplexer 103.

It can be understood that, taking band29 and band28A as examples, assuming that the terminal needs to support band29 and band28A simultaneously, but band29 and band28A do not operate simultaneously, by adding the compatible connector 102 in the transmit path of band28A and the receive path of band29, when band28A operates, the duplexer 103 is connected to the first transmit port 1012 of the transceiver 101 through the compatible connector 102, and can implement transmitting signals with a frequency in the second frequency band; when the band29 operates, the duplexer 103 is connected to the first receiving port 1011 of the transceiver 101 through the compatible connector 102, so as to implement receiving signals with frequencies in the first frequency band.

Optionally, the number of the above-mentioned duplexer 103 is 1, compare in the circuit structure shown in fig. 1, the utility model discloses a compatibility of band29 and band28A frequency channel just can be realized to a duplexer, has reduced circuit design cost, has saved the overall arrangement space of goods of furniture for display rather than for use in the circuit board.

Alternatively, if the first frequency band and the second frequency band are both supported by the terminal but do not operate simultaneously, the compatible connector 102 in the above scheme may be a switch, for example, a Single-pole double-throw (Single-pole double-throw) switch SPDT (SPDT for short). Next, on the basis of fig. 1, a possible implementation is given, referring to fig. 3, fig. 3 is a schematic structural diagram of a frequency band compatible circuit in another embodiment, and in order to implement a function of completing frequency band compatibility by switching, the frequency band compatible circuit may further include a controller 104; the controller 104 is connected to the changeover switch 102 a.

The switch 102a comprises a first selection terminal 102a-1, a second selection terminal 102a-2 and a common terminal 102 a-3; the common terminal 102a-3 is connected to the duplexer 103; the first selection terminal 102a-1 is connected to the first receiving port 1011; the second selection terminal 102a-2 is connected to the first transmission port 1012.

And a controller 104 for outputting a control signal to the changeover switch 102 a.

A switch 102a for switching between a transmission path and a reception path under the action of a control signal, wherein the transmission path is a path between the first transmission port 1012 and the second selection terminal 102 a-2; the receive path is the path between the first receive port 1011 and the first select terminal 102 a-1.

To facilitate understanding of the operation principle between the controller 104 and the switch 102a, an implementation is given below, and the control signal includes a first control signal and a second control signal.

The controller 104 is configured to output a first control signal to the switch 102a when determining that the duplexer 103 transmits a signal having a frequency within the first frequency band; when it is determined that the transceiver 101 transmits a signal having a frequency within the second frequency band, a second control signal is output to the changeover switch 102 a.

The switch 102a is used for switching to a receiving path when receiving a first control signal; and when receiving the second control signal, switching to a transmitting path.

Alternatively, considering that the mobile communication terminal product has determined the selling direction when being produced, namely, which country the batch of products is to be sold to, the design requirement of one circuit board compatible with multi-band signal transceiving can be met. The compatible connector 102 may be a resistor 102b (e.g., a chip resistor), and a possible implementation is given below on the basis of fig. 2, referring to fig. 4, where fig. 4 is a schematic structural diagram of a frequency band compatible circuit in another embodiment.

The circuit board designed based on the scheme shown in fig. 4 can meet the requirements of different frequency bands in different regions by only adding the chip resistors on the circuit board without reserving a doubled layout space according to the number of the compatible frequency bands of the circuit board, for example, taking band29 and band28A as examples, band29 is used in north america and band28A is used in european regions, so that if a product including the circuit exits north america, the product can have a function of receiving signals with frequencies within the band29 frequency band through the chip resistor 102b connected between the first receiving port 1011 of the transceiver 101 and the duplexer 103; if the product including the circuit is exported from europe, the chip resistor 102b connected between the first transmitting port 1012 of the transceiver 101 and the duplexer 103 can provide a function of receiving a signal with a frequency in the band28A frequency band, so that the size of the product can be greatly reduced, and the miniaturization design of the product is facilitated.

Optionally, in order to ensure the transmission quality of the signal with the transceiver transmission frequency in the second frequency band, the frequency band compatible circuit may further include a signal amplifier, and a possible implementation manner is given below on the basis of fig. 1, referring to fig. 5, fig. 5 is a schematic structural diagram of the frequency band compatible circuit in another embodiment, where one end of the signal amplifier 105 is connected to the first transmission port 1012, and the other end is connected to the compatible connector 102.

And a signal amplifier 105 for power amplifying the signal transmitted by the transceiver 101 with the frequency in the second frequency band.

It is understood that the transmission signal output by the signal amplifier 105 is transmitted to the antenna through the duplexer, and is finally transmitted to the outside through the antenna.

Optionally, in order to ensure transceiving of signals in each frequency band, the frequency band compatible circuit may further include an antenna switch 106, and a possible implementation manner is provided below on the basis of fig. 5, referring to fig. 6, fig. 6 is a schematic structural diagram of the frequency band compatible circuit in another embodiment, where the antenna switch 106 includes at least one antenna switching port 1061; the antenna switching port 1061 is connected to the duplexer 103.

The antenna switch 106 is configured to receive a signal with a frequency in a first frequency band through the antenna switching port 1061 when the compatible connector 102 is connected to the first receiving port 1011; when the compatible connector 102 is connected to the first transmission port 1012, a signal having a frequency in the second frequency band is transmitted through the antenna switching port.

It is understood that the antenna switch 106 may be connected to an antenna of the terminal for receiving signals transmitted by the antenna or transmitting signals to the antenna; the antenna switch 106 may also include a plurality of receive ports.

For example, with continued reference to fig. 1, the circuit structure shown in fig. 1 includes at least two antenna ports, i.e., B28A _ TRX and B29_ RX, where the B28A _ TRX port is used for transceiving signals in the band28 _ 28A frequency band, and the B29_ RX port is used for receiving signals in the band29 frequency band, it can be seen that the prior art needs two antenna switching ports to implement transceiving signals in the band29 and the band28A frequency bands, which undoubtedly increases the circuit design cost. The utility model discloses a reduce circuit design cost, on the basis of the circuit structure shown in fig. 1, not only can realize using an antenna to switch the port and accomplish different frequency channels compatibly, can also save an antenna change over switch port, practice thrift goods of furniture for display rather than for use overall arrangement space.

Optionally, referring to fig. 7, fig. 7 is a schematic structural diagram of a frequency band compatible circuit in another embodiment, where the transceiver 101 further includes a second receiving port 1013; the duplexer 103 is connected to the second reception port 1013.

And a second receiving port 1013 for receiving the signal with the frequency in the third frequency band transmitted by the duplexer 103.

It will be appreciated that the third frequency band is referred to as having a frequency range of 758MHZ-788 MHZ.

To sum up, the utility model provides a frequency channel compatible circuit includes: a transceiver, a compatible connector, and a duplexer. The transceiver further comprises a first receive port and a first transmit port; the first receiving port is used for receiving signals with frequencies in a first frequency band; the first transmitting port is used for transmitting signals with the rate within a second frequency band; the compatible connector is used for sending the signals of the frequency in the first frequency band transmitted by the duplexer to the transceiver when the compatible connector is connected with the first receiving port; when the first transmitting port is connected, the signals with the frequency in the second frequency band transmitted by the transceiver are sent to the duplexer. The utility model provides a frequency channel compatible circuit can realize the connection of transceiver and a duplexer through a compatible connector, realize that the frequency channel is compatible with, reduced manufacturing cost, reduction device layout area.

It should be noted that, for the specific construction mode of the line gating unit, the embodiment is not limited to the above example, and other components with gating function may also be used to implement the construction.

In an embodiment, the embodiment of the present invention further provides a terminal, refer to fig. 8, and fig. 8 is a schematic structural diagram of a terminal provided in the embodiment of the present invention, where the terminal 20 includes the frequency band compatible circuit 10 and the antenna 21 provided in each of the above embodiments, and the terminal 20 may be but not limited to various mobile communication terminal products such as various personal computers, notebook computers, smart phones, tablet computers, and portable wearable devices, so as to meet the compatibility design requirements of the products facing different markets.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A frequency band compatible circuit, comprising: a transceiver, a duplexer, and a compatible connector; the transceiver comprises a first receive port and a first transmit port; the first receiving port is used for receiving signals with frequencies within a first frequency band; the first transmitting port is used for transmitting signals with frequencies in a second frequency band; the second frequency band comprises the first frequency band;

the compatible connector is used for transmitting the signal of the frequency transmitted by the duplexer within the first frequency band to the transceiver when being connected with the first receiving port; and when the first transmitting port is connected, the signal of the transceiver transmitting frequency in the second frequency band is sent to the duplexer.

2. The band compatible circuit of claim 1, further comprising a controller; the compatible connector is a change-over switch; the controller is connected with the selector switch; the change-over switch comprises a public end, a first selection end and a second selection end; the common terminal is connected with the duplexer; the first selection end is connected with the first receiving port; the second selection end is connected with the first transmission port;

the controller is used for outputting a control signal to the selector switch;

the change-over switch is used for realizing the switching between a transmitting path and a receiving path according to the received control signal;

wherein the transmitting path is a path between the first transmitting port and the second selecting terminal, and the receiving path is a path between the first receiving port and the first selecting terminal.

3. The band compatible circuit of claim 2 wherein the control signal comprises a first control signal and a second control signal;

the controller is used for outputting a first control signal to the change-over switch when the signal of the transmission frequency of the duplexer in the first frequency band is determined; when the transceiver is determined to transmit a signal with the frequency within the second frequency band, outputting a second control signal to the switch;

the switch is used for switching to the receiving path when receiving the first control signal; and when the second control signal is received, switching to the transmitting path.

4. The band-compatible circuit of claim 1, wherein the compatible connector is a resistor.

5. The band compatible circuit of claim 1, further comprising a signal amplifier; one end of the signal amplifier is connected with the transmitting port, and the other end of the signal amplifier is connected with the compatible connector;

the signal amplifier is used for carrying out power amplification on the signals, transmitted by the transceiver, of which the frequency is within the second frequency band.

6. The band compatible circuit of claim 5 further comprising an antenna switch; the antenna switch comprises at least one antenna switching port, and the antenna switching port is connected with the duplexer;

the antenna switch is configured to receive, through the antenna switching port, a signal having a frequency in the first frequency band when the compatible connector is connected to the first receiving port; and when the compatible connector is connected with the first transmitting port, transmitting the signal with the frequency in the second frequency band through the antenna switching port.

7. The band-compatible circuit of claim 6, wherein the antenna switch is connected to an antenna of the terminal.

8. The band compatible circuit of any of claims 1-7, wherein the transceiver further comprises a second receive port; the duplexer is connected with the second receiving port;

and the second receiving port is used for receiving the signal which is sent by the duplexer and has the frequency in the third frequency band.

9. The band-compatible circuit according to claim 8, wherein the number of duplexers is one.

10. A terminal comprising an antenna, characterized in that the terminal comprises a band-compatible circuit according to any of claims 1-9; the frequency band compatible circuit is connected with the antenna.