4G radio frequency circuit supporting CA function

Abstract

The utility model relates to a 4G radio frequency circuit supporting a CA function. The 4G radio frequency circuit comprises a transmitting part, a receiving part, a diversity receiving part and a logic controller. According to the 4G radio frequency circuit supporting the CA function, by improving the circuit design, under the condition that original functions and performance are reduced, the area of a PCB used by the radio frequency circuit is reduced, the cost is reduced by 50%, various small or miniature wireless products can be conveniently and flexibly designed, and the competitiveness of the products can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of 4G radio frequency circuits, and in particular to a 4G radio frequency circuit supporting a CA function. Background Art

[0002] Currently, the communication motherboards on the market are generally manufactured according to the chip application design solutions provided by chip manufacturers. The circuits are relatively complex and expensive, resulting in high costs. They occupy a large space on the PCB board, which brings great difficulties to the design of small products and limits the competitiveness of the products. Utility Model Content

[0003] In view of this, it is necessary to provide a 4G radio frequency circuit supporting the CA function which has a simple structure, is easy to operate, and ensures connection reliability.

[0004] A 4G radio frequency circuit supporting CA function, characterized in that it includes a main antenna, a power coupler F1, a main antenna switch, a multi-band duplexer and filter, a radio frequency transceiver chip, a radio frequency power amplifier, a diversity antenna, a diversity antenna switch, a diversity reception filter, and a logic control chip; the main antenna is connected to the antenna interface of the power coupler F1, the line interface of the power coupler F1 is connected to the output end of the main antenna switch, the input port of the main antenna switch is respectively connected to the TX output end of the multi-band duplexer and filter, the output port of the main antenna switch is respectively connected to the RX input end of the multi-band duplexer and filter, the TX input end of the multi-band duplexer and filter is connected to the output port of the radio frequency power amplifier, and the input interface of the radio frequency power amplifier is connected to the TX of the radio frequency transceiver chip. The output interface, the RX output interface of the multi-band duplexer and the filter is connected to the RX input interface of the RF transceiver chip, the power detection output signal of the power coupler is connected to the power detection input interface of the RF transceiver chip, the logic control chip is connected to the main antenna switch through the GPIO interface to control the main antenna switch, the logic control chip is connected to the RF power amplifier through the MIPI interface, and the logic control chip is connected to the RF transceiver chip through the GPIO interface; the diversity antenna is connected to the antenna end of the diversity antenna switch, the output end of the diversity antenna switch is connected to the RX input interface of the diversity reception filter, the RX output interface of the diversity reception filter is connected to the diversity reception RX input interface of the RF transceiver, and the logic control chip is connected to the diversity antenna switch through the GPIO interface to control the diversity antenna switch.

[0005] Furthermore, the power coupler F1 is responsible for the transmission of the antenna RF transmission signal and the reception signal, realizes the best matching between the main antenna and the RF power amplifier within the working frequency band, and detects the power level of the transmitted and received RF signals at the same time, and the obtained power level signal is sent to the power detection input end of the RF transceiver; the main antenna switch selects to control the reception or transmission of RF signals, multiple frequency band duplexers and filters are used to isolate the transmission signals and reception signals of multiple frequency bands, filter the transmission signals and reception signals of each working frequency band, and filter out interference signals and useless signals. The RF power amplifier amplifies the 4G RF signal and amplifies the RF signal to be transmitted to the required power level to meet the transmission needs of the main antenna. The RF transceiver selects to control the transmission or reception of the 4G RF signal, the diversity antenna switch selects to control the reception of the diversity RF signal, and the diversity reception filter filters the received signal.

[0006] Furthermore, the functional unit of the 4G RF line comprises a main transmitting and receiving part, a diversity receiving part, a RF transceiver U0600, and a logic control part. The main transmitting and receiving part comprises a main antenna, a power coupler F1, a main antenna switch, a duplexer and a filter U0710, a duplexer and a filter U0712, a duplexer and a filter U0713, a duplexer and a filter U0714, and a RF power amplifier U2. The diversity receiving part comprises a diversity antenna, a diversity receiving switch, and a filter. The main antenna is connected to the ANT-MAIN terminal of the power coupler F1, and the power detection output terminal of the power coupler F1 is connected to the power detection input terminal P of the RF transceiver U0600. DET, the ANTO terminal of the power coupler F1 is connected to the antenna terminal ANTO of the main antenna switch, the transmitting input terminal of the main antenna switch is respectively connected to the filter output terminals of the bandpass filter U0706, the bandpass filter U0708, and the bandpass filter U0719, the filter input terminals of the bandpass filter U0706, the bandpass filter U0708, and the bandpass filter U0719 are respectively connected to the output terminal of the power amplifier according to the frequency band, and the transmit signal output by the power amplifier is filtered, the transmit signal input terminal of the power amplifier is connected to the transmit signal output port TX of the RF transceiver U0600, and the receiving output terminal of the main antenna switch is respectively connected to the duplexer and filter U0710, the duplexer and filter U0712, and the duplexer The input ends of the diplexer and filter U0713 and the duplexer and filter U0714 are connected to the PRX port of the RF transceiver U0600 respectively, the diversity antenna is connected to the antenna end ANT-DRX of the diversity reception switch, the receiving output port of the diversity reception switch is connected to the input ends of the filter U0801, the filter U0803, the filter U0804, the filter U0808, the filter U0809 and the filter U0810 respectively, the filter U0801, the filter U0803, the filter U0804, the filter U0808 The output ends of the filter U0809 and the filter U0810 are respectively connected to the diversity receiving port DRX of the RF transceiver U0600 according to the frequency band. The RF transceiver U0600 controls the conversion of the RF circuit between the receiving state and the transmitting state. The logic control part controls the working state of the entire 4G RF line. In the transmitting state, the logic control part controls the RF transceiver U0600 to output the RF signal to the RF power amplifier for amplification and frequency band allocation switching. The output RF signal of the RF power amplifier is transmitted to the duplexer and the filter for filtering. The RF signal output by the duplexer and the filter is sent to the main antenna switch. The logic control part controls the main antenna switch to output the RF signal to the power coupler F1.The RF signal is output to the main antenna through the power coupler and the main antenna radiates the 4G RF signal into the air. The power coupler detects the power of the sent and received RF signals, detects the power level of the RF signal and sends it to the RF transceiver U0600 for monitoring; in the receiving state, the main antenna receives the 4G signal in the air and sends it to the main antenna switch through the power coupler F1. Under the control of the logic control part, the main antenna switch transmits the received 4G RF signal to the multi-band duplexer and filter and switches the channel allocation. The received 4G RF signal is filtered and processed. Then it is sent to the RF transceiver U0600. At the same time, the diversity antenna receives the 4G signal in the air and directly sends it to the diversity antenna switch. Under the control of the logic control part, the diversity antenna switch sends the received 4G RF signal to the filter and switches the channel allocation. The 4G RF signal received by the diversity antenna is filtered and sent to the RF transceiver U0600 after filtering. The transmission and reception process of the entire RF circuit and the working timing of all chips are controlled by the logic control chip. All working frequency bands and working states need to be preset and configured through the logic file of the logic control chip.

[0007] The CA function is realized and Cat7 is supported through the preset configuration of the logic file of the logic control chip.

[0008] Specifically, the model of the RF transceiver is SR3595D, the model of the RF power amplifier is OM8440-11, the model of the logic control chip is UIS7863, and the model of the main antenna switch and the diversity antenna switch is RSW5108T.

[0009] Furthermore, the logic control chip is responsible for the control signal function of the 4G sending and receiving chips. The RF transceiver is responsible for the conversion of 4G RF signal sending and receiving signals. The RF power amplifier is mainly responsible for further amplifying the RF transmission signal output by the RF transceiver to achieve the power required for transmission, and then sending the RF transmission signal to the duplexer and filter for filtering according to the corresponding frequency band.

[0010] The above-mentioned 4G RF circuit supporting CA function, by improving the circuit design, ensures that the original functions and performance are not reduced. The PCB board area used by the RF circuit is reduced to facilitate the design of smaller ID appearance products, which can meet the needs of demanding customers, increase selling points, increase profits, facilitate the company's material preparation, save preparation time and cost, and improve product production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a principle block diagram of a 4G radio frequency circuit supporting the CA function according to an embodiment of the utility model.

[0012] Figure 2It is a schematic diagram of the PMU simulation part of the 4G radio frequency circuit supporting the CA function according to an embodiment of the utility model.

[0013] Figure 3 This is a circuit diagram of one of the eMMC storage parts of the 4G radio frequency circuit supporting the CA function in an embodiment of the utility model.

[0014] Figure 4 This is a second circuit diagram of the eMMC storage part of the 4G radio frequency circuit supporting the CA function according to an embodiment of the utility model.

[0015] Figure 5 It is a circuit diagram of the logic control chip UIS7863 of the 4G radio frequency circuit supporting the CA function according to an embodiment of the utility model.

[0016] Figure 6 This is a circuit diagram of the RF power amplifier OM8440-11 of the 4G RF circuit supporting the CA function according to an embodiment of the utility model.

[0017] Figure 7 It is a circuit diagram of a power coupler of a 4G radio frequency circuit supporting a CA function according to an embodiment of the utility model.

[0018] Figure 8 This is a circuit diagram of the main antenna switch RSW5108T of the 4G radio frequency circuit supporting the CA function in an embodiment of the utility model.

[0019] Fig. 9 It is a circuit diagram of the band B5 and band B8 duplexers and filters of a 4G radio frequency circuit supporting the CA function according to an embodiment of the utility model.

[0020] Fig.10 It is a bandpass filter circuit diagram of the transmission band B34, band B39, band B40, and band B41 of the 4G radio frequency circuit supporting the CA function in the embodiment of the utility model.

[0021] Fig.11 It is a circuit diagram of a diversity antenna switch RSW5108T of a 4G radio frequency circuit supporting a CA function according to an embodiment of the utility model.

[0022] Fig.12 It is a filter circuit diagram of diversity reception bands B1, B3, B5 and B8 of a 4G radio frequency circuit supporting CA function according to an embodiment of the utility model.

[0023] Fig.13 It is a filter circuit diagram of diversity reception band B34, band B39, band B40, band B41N (B38) of a 4G radio frequency circuit supporting CA function according to an embodiment of the utility model.

[0024] Fig.14It is a circuit diagram of a duplexer and filter for band B1 and band B3 of a 4G radio frequency circuit supporting a CA function according to an embodiment of the utility model.

[0025] Fig.15 It is a partial circuit diagram of the radio frequency transceiver transmission port TX, reception port PRX and diversity reception port DRX of a 4G radio frequency circuit supporting CA function in an embodiment of the utility model. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below with reference to specific embodiments and accompanying drawings.

[0027] See also Figure 1-Figure 15 , showing a 4G RF circuit supporting CA function provided by an embodiment of the utility model, including a main antenna, a power coupler F1, a main antenna switch, multiple frequency band duplexers and filters, a RF transceiver chip, a RF power amplifier, a diversity antenna, a diversity antenna switch, a diversity reception filter, and a logic control chip; the main antenna is connected to the antenna interface of the power coupler F1, the line interface of the power coupler F1 is connected to the output end of the main antenna switch, the input end of the main antenna switch is respectively connected to the TX output interfaces of the multiple frequency band duplexers and filters, the output port of the main antenna switch is connected to the RX input interfaces of the multiple frequency band duplexers and filters, the TX input interfaces of the multiple frequency band duplexers and filters, the output interface of the RF power amplifier, and the input interface of the RF power amplifier is connected to the RF The TX output interface of the frequency transceiver, the RX output interface of multiple frequency band duplexers and filters is connected to the PRX input port of the RF transceiver, the power detection output signal end of the power coupler F1 is connected to the power detection input end of the RF transceiver, the logic control chip is connected to the main antenna switch through the GPIO interface, the logic control chip is connected to the RF power amplifier through the MIPI interface, and the logic control chip is connected to the RF transceiver through the GPIO interface; the diversity antenna is connected to the antenna end of the diversity antenna switch, the output port of the diversity antenna switch is connected to the DRX input interface of the diversity reception filter, the RX output interface of the diversity reception filter is connected to the diversity reception DRX input port of the RF transceiver, and the logic control chip is connected to the diversity antenna switch through the GPIO interface.

[0028] The functional unit structure of the 4G radio frequency line includes a main transmitting and receiving part, a diversity receiving part, a radio frequency transceiver U0600, and a logic control part. The main transmitting and receiving part includes a main antenna, a power coupler F1, a main antenna switch, a duplexer and a filter U0710, a duplexer and a filter U0712, a duplexer and a filter U0713, a duplexer and a filter U0714, and a radio frequency power amplifier U2. The diversity receiving part includes a diversity antenna, a diversity receiving switch, and a filter. The main antenna is connected to the ANT-MAIN end of the power coupler F1, the power detection output end of the power coupler F1 is connected to the power detection input end PDET of the radio frequency transceiver U0600, and the ANTO end of the power coupler F1 is connected to the main antenna switch. Antenna terminal ANTO, the transmitting input terminal of the main antenna switch is respectively connected to the filtering output terminals of the bandpass filter U0706, the bandpass filter U0708, and the bandpass filter U0719, the filtering input terminals of the bandpass filter U0706, the bandpass filter U0708, and the bandpass filter U0719 are connected to the output of the power amplifier according to the frequency band, and the transmitting signal output by the power amplifier is filtered, the transmitting signal input terminal of the power amplifier is connected to the transmitting signal output port TX of the RF transceiver, and the receiving output terminal of the main antenna switch is respectively connected to the input terminals of the duplexer and filter U0710, the duplexer and filter U0712, the duplexer and filter U0713, and the duplexer and filter U0714, The output ends of the multiplexer and filter U0710, the duplexer and filter U0712, the duplexer and filter U0713, and the duplexer and filter U0714 are respectively connected to the PRX port of the RF transceiver, the diversity antenna is connected to the antenna end ANT-DRX of the diversity reception switch, the reception output end of the diversity reception switch is respectively connected to the input ends of the filter U0801, the filter U0803, the filter U0804, the filter U0808, the filter U0809, and the filter U0810, and the output ends of the filter U0801, the filter U0803, the filter U0804, the filter U0808, the filter U0809, and the filter U0810 are respectively connected to the diversity reception port of the RF transceiver U0600 according to the band. DRX, the RF transceiver U0600 controls the conversion of the RF circuit between the receiving state and the transmitting state. The logic control part controls the working state of the RF line. In the transmitting state, the logic control part controls the RF transceiver to output the RF signal to the RF power amplifier for amplification and frequency band allocation switching. The output RF signal of the RF power amplifier is sent to the duplexer and filter for filtering. The RF signal output by the duplexer and filter is sent to the main antenna switch. The logic control part controls the main antenna switch to output the RF signal to the power coupler F1. The RF signal is output to the main antenna through the power coupler F1 and the main antenna radiates the 4G RF signal into the air. The power coupler F1 performs power detection on the power of the sent and received RF signals.Detect the power level of the RF signal and send it to the RF power detection input terminal PDET of the RF transceiver for monitoring; in the receiving state, the main antenna receives the 4G signal in the air and sends it to the main antenna switch through the power coupler. Under the control of the logic control part, the main antenna switch transmits the received 4G RF signal to the duplexer and filter and switches the channel allocation. The received 4G RF signal is filtered and processed, and then sent to the RF transceiver chip after filtering. At the same time, the diversity antenna receives the 4G signal in the air and directly sends it to the diversity antenna switch. Under the control of the logic control part, the diversity antenna switch transmits the received 4G RF signal to the filter and switches the channel allocation. The 4G RF signal received by the diversity antenna is filtered and processed, and then sent to the RF transceiver chip after filtering. The entire RF circuit transmission and reception process, all chip working timing, are controlled by the logic control chip, and all working frequency bands and working states need to be preset and configured through the logic file of the logic control chip. ,

[0029] The logic control chip sets the transmission and reception parameters of band1, band3, band5, band8, band34 / 39, band40, band38 / 41 frequency bands and the reception logic parameters of the diversity reception frequency band as required.

[0030] The CA function is realized and Cat7 is supported through the preset configuration of the logic file of the logic control chip.

[0031] The model of the RF transceiver chip is SR3595D, the model of the RF power amplifier is OM8440-11, the model of the logic control chip is UIS7863, and the model of the main antenna switch and the diversity antenna switch is RSW5108T.

[0032] The 4G radio frequency circuit supporting the CA function reduces the PCB board area used by the radio frequency circuit by improving the circuit design, while ensuring that the original function and performance are not reduced, and reduces the cost by 50%, which is convenient for flexible design of various small or micro wireless products and helps to improve the competitiveness of products. The circuit structure of the utility model is simple, easy to produce, low cost, and easy to promote.

[0033] It should be noted that the present invention is not limited to the above-mentioned embodiments. According to the creative spirit of the present invention, those skilled in the art may also make other changes. These changes made according to the creative spirit of the present invention should be included in the scope of protection required by the present invention.

Claims

1. A 4G radio frequency circuit supporting CA function, characterized in that: The invention comprises a main antenna, a power coupler F1, a main antenna switch, a multi-band duplexer and filter, a radio frequency transceiver, a radio frequency power amplifier, a diversity antenna, a diversity antenna switch, a diversity receiving filter, and a logic control chip; the main antenna is connected to the antenna interface of the power coupler F1, the line interface of the power coupler F1 is connected to the output end of the main antenna switch, the input end of the main antenna switch is connected to the TX output interface of the multi-band duplexer and filter, the output end of the main antenna switch is connected to the RX input interface of the multi-band duplexer and filter, the TX input interface of the multi-band duplexer and filter is connected to the output interface of the radio frequency power amplifier, the input interface of the radio frequency power amplifier is connected to the TX output interface of the radio frequency transceiver, and the R The X output interface is connected to the RX input interface of the RF transceiver, the power detection output signal of the power coupler F1 is connected to the power detection input interface of the RF transceiver, the logic control chip is connected to the main antenna switch through the GPIO interface to control the main antenna switch, the logic control chip is connected to the RF power amplifier through the MIPI interface, and the logic control chip is connected to the RF transceiver through the GPIO interface; the diversity antenna is connected to the input end of the diversity antenna switch, the output end of the diversity antenna switch is connected to the RX input interface of the diversity reception filter, the RX output interface of the diversity reception filter is connected to the diversity reception RX input interface of the RF transceiver, and the logic control chip is connected to the diversity antenna switch through the GPIO interface to control the diversity antenna switch.

2. The 4G radio frequency circuit supporting CA function as claimed in claim 1, characterized in that: The 4G RF circuit functional unit comprises a main transmitting and receiving part, a diversity receiving part, a RF transceiver U0600, and a logic control part. The main transmitting and receiving part comprises a main antenna, a power coupler F1, a main antenna switch, a duplexer and a filter U0710, a duplexer and a filter U0712, a duplexer and a filter U0713, a duplexer and a filter U0714, and a RF power amplifier U2. The diversity receiving part comprises a diversity antenna, a diversity receiving switch, and a filter. The main antenna is connected to the ANT-MAIN end of the power coupler F1, and the power detection output end of the power coupler F1 is connected to the radio frequency detection output terminal. The power detection input terminal PDET of the frequency transceiver U0600, the ANTO terminal of the power coupler F1 is connected to the antenna terminal ANTO of the main antenna switch, the transmission input port of the main antenna switch is respectively connected to the filter output terminals of the bandpass filter U0706, the bandpass filter U0708, and the bandpass filter U0719, the filter input terminals of the bandpass filter U0706, the bandpass filter U0708, and the bandpass filter U0719 are respectively connected to the output port of the power amplifier according to the frequency band, and the transmission signal output by the power amplifier is filtered. The transmission signal input terminal of the power amplifier The receiving port is connected to the transmitting signal output port TX of the RF transceiver, the receiving output end of the main antenna switch is respectively connected to the input end of the duplexer and filter U0710, the duplexer and filter U0712, the duplexer and filter U0713, and the duplexer and filter U0714, the output ends of the duplexer and filter U0710, the duplexer and filter U0712, the duplexer and filter U0713, and the duplexer and filter U0714 are respectively connected to the PRX port of the RF transceiver, the diversity antenna is connected to the antenna end ANT-DRX of the diversity receiving switch, and the receiving output port of the diversity receiving switch is respectively connected to the filter The input ends of the filter U0801, the filter U0803, the filter U0804, the filter U0808, the filter U0809, and the filter U0810, and the output ends of the filters U0801, the filter U0803, the filter U0804, the filter U0808, the filter U0809, and the filter U0810 are respectively connected to the diversity receiving port DRX of the RF transceiver U0600 according to the band. The RF transceiver U0600 controls the conversion of the 4G RF circuit between the receiving state and the transmitting state, and the logic control part is used to control the working state of the entire 4G RF line.

3. The 4G radio frequency circuit supporting CA function as claimed in claim 1, characterized in that: The logic control chip cooperates with the RF transceiver U0600 to implement the CA function and support Cat7.

4. The 4G radio frequency circuit supporting CA function as claimed in claim 2, characterized in that: The model of the radio frequency transceiver is SR3595D, the model of the radio frequency power amplifier is OM8440-11, the model of the logic control chip is UIS7863, and the model of the main antenna switch and the diversity antenna switch is RSW5108T.

Images