CN115173878B

CN115173878B - Radio frequency front-end device and electronic equipment

Info

Publication number: CN115173878B
Application number: CN202210758577.3A
Authority: CN
Inventors: 陈锋; 仝林
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2024-12-03
Anticipated expiration: 2042-06-29
Also published as: CN115173878A

Abstract

The application discloses a radio frequency front-end device and electronic equipment, wherein the radio frequency front-end device integrates LBPA, MB PA, HB PA, a filter, LNA and a switch, so that the support of low, medium and high frequency bands (LMHband) is realized, the M+H double-transmitting function is supported, the occupied area of a PCB (printed circuit board) is better saved, and the cost of the electronic equipment is reduced.

Description

Radio frequency front-end device and electronic equipment

Technical Field

The present application relates to, but not limited to, electronic technology, and in particular, to a radio frequency front end device and an electronic device.

Background

With the development and progress of technology, 5G mobile communication technology is gradually beginning to be applied to electronic devices. With the increase of communication network systems, the terminal equipment must support the communication requirements of 2G, 3G, 4G and 5G network systems, and the space of the main board PCB is not greatly increased due to the increase of the requirements due to the restriction of the terminal equipment on the size, which leads to the very tension of the space layout and wiring of the main board PCB.

Along with the continuous evolution of electronic equipment such as mobile phone ID and functions, such as a double-loudspeaker (speaker), a large battery, a multi-camera module and the like, the available space of a mobile phone PCB is greatly compressed, and therefore, higher requirements are put forward on a radio frequency scheme.

Disclosure of Invention

The application provides a radio frequency front-end device and electronic equipment, which can better save the occupied area of a PCB and reduce the cost.

The embodiment of the application provides a radio frequency front-end device, which is provided with a high-frequency transmitting port, an intermediate-frequency transmitting port, a low-frequency transmitting port, at least five receiving ports, a low-frequency antenna port, a medium-high frequency antenna port, a high-frequency antenna port, at least one low-frequency auxiliary transmitting port, at least one low-frequency auxiliary receiving port and at least one low-frequency auxiliary receiving port, wherein the low-frequency auxiliary transmitting port, the medium-high frequency antenna port, the high-frequency antenna port, the at least one low-frequency auxiliary transmitting port, the at least one low-frequency auxiliary receiving port and the at least one low-frequency auxiliary receiving port are used for external low-frequency band expansion, the low-frequency auxiliary transmitting port and the low-frequency auxiliary receiving port are used for external medium-high-frequency band expansion, the low-frequency auxiliary transmitting port and the low-frequency auxiliary receiving port are in one-to-one correspondence through a first external circuit, and the radio frequency front-end device comprises:

the transmitting circuit is connected with the high-frequency transmitting port, the intermediate-frequency transmitting port, the low-frequency transmitting port and the low-frequency auxiliary transmitting port and is used for amplifying power of a high-frequency band signal from the high-frequency transmitting port, an intermediate-frequency band signal from the intermediate-frequency transmitting port and a low-frequency band signal from the low-frequency transmitting port and outputting the amplified signals to the filter circuit;

the filtering circuit is used for filtering the light emitted by the light source, the switching circuit is used for filtering the received high-frequency band signals, the received intermediate-frequency band signals and the received low-frequency band signals and outputting the signals;

The switch circuit is used for selectively conducting the radio frequency channels between the filter circuit and the high-frequency antenna port, the middle-high-frequency antenna port and the low-frequency antenna port, and is connected with the low-frequency auxiliary receiving and transmitting port and used for selectively conducting the radio frequency channels between the first external circuit and the low-frequency antenna port;

The receiving circuit is connected with the receiving port, the low-frequency auxiliary receiving port, the middle-high frequency auxiliary receiving port and the filtering circuit, and is used for carrying out low-noise amplification processing on the received MIMO signals from the low-frequency auxiliary receiving port and the middle-high frequency auxiliary receiving port and outputting the MIMO signals to one receiving port, and carrying out amplification processing on the radio frequency signals from the filtering circuit and outputting the signals to one receiving port.

The radio frequency front-end device provided by the embodiment of the application integrates the LB PA, the MB PA, the HB PA, the filter, the LNA and the switch, realizes the support of low-medium-high frequency band (LMH band) at the same time, supports the M+H double-transmission function, better saves the occupied area of a PCB and reduces the cost.

The embodiment of the application also provides electronic equipment, which comprises the radio frequency front-end device.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate and do not limit the application.

Fig. 1 is a schematic structural diagram of a first embodiment of a radio frequency front-end device according to an embodiment of the present application;

Fig. 2 is a schematic structural diagram of a second embodiment of a rf front-end device according to an embodiment of the present application;

Fig. 3 is a schematic diagram illustrating the composition and structure of an embodiment of an L-PA Mid device according to an embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail hereinafter with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be arbitrarily combined with each other.

In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings. Embodiments of the application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

It is to be understood that the terms "first," "second," and the like, as used herein, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

It is to be understood that in the following embodiments, "connected" is understood to mean "electrically connected", "communicatively connected", etc., if the connected circuits, modules, units, etc., have electrical or data transfer between them.

As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," and/or the like, specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof. Also, the term "and/or" as used in this specification includes any and all combinations of the associated listed items.

Generally, electronic devices such as mobile phones with compact space available on a PCB often employ a radio frequency front-end device such as a radio frequency L-PA Mid integrated module scheme in a radio frequency scheme, wherein the L-PA Mid device may be understood as a power amplifier module (L-PA Mid Power Amplifier Modules including Duplexers With LNA) with a built-in low-noise amplifier, which occupies a smaller space than a discrete scheme. For the existing scheme of the 5G mobile phone supporting NSA, an L-PA Mid device supporting a low frequency band (LB), an L-PA Mid device supporting a middle and high frequency band (MHB) and an ENDC Power Amplifier (PA) supporting at least a middle frequency band (MB) or a high frequency band (HB) are needed to be matched. Although highly integrated devices such as L-PA Mid devices have been used in the related art, the area required is not small due to the large number of devices. Meanwhile, the ENDC PA matched for realizing M+ H, M +H also brings about an increase in cost. Wherein ENDC is an abbreviation for EUTRA NR Dual-Connectivity, E represents E-UTRA, the air interface belonging to 3GPP LTE is the eighth release of 3GPP, N represents N radio 5G, and D represents LTE and 5G Dual Connectivity. ENDC can be understood as the mutual compatibility of 4G and 5G dual connectivity.

In order to better save the occupied area of a PCB, the embodiment of the application provides a radio frequency front-end device which simultaneously supports a medium-high frequency band (LMH band).

Fig. 1 is a schematic structural diagram of an rf front-end device according to an embodiment of the present application, as shown IN fig. 1, the rf front-end device is at least provided with a high-frequency transmit port hb_in, an intermediate-frequency transmit port mb_in, a low-frequency transmit port lb_in, at least five receive ports lna_out (such as the receive ports lna_out1, lna_out2, lna_out3, lna_out4, lna_out5 shown IN fig. 1), a low-frequency antenna port lb_ant, a middle-high-frequency antenna port mhb_ant, a high-frequency antenna port hb_ant, and, at least one low-frequency auxiliary transmitting port lb_tx (low-frequency auxiliary transmitting port lb_tx1 as shown IN fig. 1), at least one low-frequency auxiliary transceiving port lb_trx (low-frequency auxiliary transceiving port lb_trx1 as shown IN fig. 1) and at least one low-frequency auxiliary receiving port lb_aux (low-frequency auxiliary receiving port lb_aux1 as shown IN fig. 1) for external low-frequency band extension, at least one mid-high-frequency auxiliary receiving port mhb_aux (mid-high-frequency auxiliary receiving port mhb_aux1 and/or mid-high-frequency auxiliary receiving port mhb_aux2 and/or mid-high-frequency auxiliary receiving port mhb_aux3) for external mid-high-frequency band extension; the low-frequency auxiliary transmitting port lb_tx and the low-frequency auxiliary receiving and transmitting port lb_trx are connected IN one-to-one correspondence through a first external circuit, and the radio-frequency front-end device shown IN fig. 1 at least comprises:

A transmitting circuit 10 connected to the high-frequency transmitting port HB_IN, the intermediate-frequency transmitting port MB_IN, the low-frequency transmitting port LB_IN, and the low-frequency auxiliary transmitting port LB_TX, for amplifying power of the high-frequency band signal from the high-frequency transmitting port HB_IN, the intermediate-frequency band signal from the intermediate-frequency transmitting port MB_IN, and the low-frequency band signal from the low-frequency transmitting port LB_IN, and outputting the amplified signals to the filter circuit 140;

The filtering circuit 140 is configured to provide a filtered signal, the switching circuit 20 is used for filtering the received high-frequency band signal, the received intermediate-frequency band signal and the received low-frequency band signal and outputting the signals;

A switch circuit 20 for selectively conducting the radio frequency path between the filter circuit 140 and the high frequency antenna port HB_ANT, the middle and high frequency antenna port MHB_ANT, and the low frequency antenna port LB_ANT, and the switch circuit 20 is connected with the low frequency auxiliary receiving and transmitting port LB_TRX for selectively conducting the radio frequency path between the first external circuit and the low frequency antenna port LB_ANT;

The receiving circuit 150 is connected to the receiving port lna_outl, the low-frequency auxiliary receiving port lb_aux1, the middle-high frequency auxiliary receiving port mhb_aux and the filtering circuit 140, and is configured to amplify the received MIMO signals from the low-frequency auxiliary receiving port lb_aux and the middle-high frequency auxiliary receiving port mhb_aux connected to the external circuit, and output the amplified signals to a receiving port LNA OUT, and amplify the rf signals from the filtering circuit 140 and output the amplified signals to a receiving port LNA OUT.

In one illustrative example, the transmit circuit 10 may include a high frequency power amplifier (HB PA) 110, an intermediate frequency power amplifier (MB PA) 120, a low frequency power amplifier (LB PA) 130, a first switching circuit 160, a second switching circuit 170, wherein,

A high-frequency power amplifier (HB PA) 110 connected to the high-frequency transmission port hb_in for power amplifying the high-frequency band signal from the high-frequency transmission port hb_in and outputting a first switching circuit 160;

an intermediate frequency power amplifier (MB PA) 120 connected to the intermediate frequency transmitting port mb_in, for amplifying the power of the intermediate frequency signal from the intermediate frequency transmitting port mb_in and outputting a first switching circuit 160;

A low frequency power amplifier (LB PA) 130 connected to the low frequency transmission port lb_in for power amplifying the low frequency band signal from the low frequency transmission port lb_in and outputting a second switching circuit 170;

The first switch circuit 160, a plurality of second ports of the first switch circuit 160 are respectively connected with the filter circuit 140, a first port of the first switch circuit 160 is connected with an output end of the high-frequency power amplifier 110 for selecting and conducting a radio frequency channel between the high-frequency power amplifier 110 and the filter circuit 140, another first port of the first switch circuit 160 is connected with an output end of the intermediate-frequency power amplifier 120 for selecting and conducting a radio frequency channel between the intermediate-frequency power amplifier 120 and the filter circuit 140, the remaining first ports of the first switch circuit 160 are connected with the receiving circuit 150 for selecting and conducting a radio frequency channel of a preset frequency channel between the filter circuit 140 and the receiving circuit 150, and in one embodiment, the preset frequency channel is a frequency channel of ENDC, and in one embodiment, the preset frequency channel comprises a B3 frequency channel, a B39 frequency channel and an N41 frequency channel.

The second switch circuit 170, a plurality of second ports of the second switch circuit 170 are respectively connected with the filter circuit 140, a first port of the second switch circuit 170 is connected with the output end of the low-frequency power amplifier 130 for selecting and conducting the radio-frequency path between the low-frequency power amplifier 130 and the filter circuit 140, a second port of the second switch circuit 170 is connected with the low-frequency auxiliary transmitting port LB_TX for selecting and conducting the radio-frequency path between the low-frequency power amplifier 130 and the first external circuit;

in one illustrative example, the switching circuit 20 may include a third switching circuit 180, a fourth switching circuit 190, wherein,

The filter circuit 140 is configured to filter the received high-frequency band signal and the received intermediate-frequency band signal, and output the signals to the third switch circuit 180, and filter the received low-frequency band signal and output the signals to the fourth switch circuit 190;

The third switch circuit 180, a plurality of second ports of the third switch circuit 180 are respectively connected with the filter circuit 140, a first port of the third switch circuit 180 is connected with the high-frequency antenna port HB_ANT for selecting and conducting a radio-frequency path between the filter circuit 140 and the high-frequency antenna port HB_ANT, and another first port of the third switch circuit 180 is connected with the middle-high-frequency antenna port MHB_ANT for selecting and conducting a radio-frequency path between the filter circuit 140 and the middle-high-frequency antenna port MHB_ANT;

A plurality of second ports of the fourth switch circuit 190 are respectively connected with the filter circuit 140, a first port of the fourth switch circuit 190 is connected with the low-frequency antenna port LB_ANT for selecting and conducting a radio-frequency channel between the filter circuit 140 and the low-frequency antenna port LB_ANT;

The radio frequency front-end device provided by the embodiment of the application shown in the figure 1 integrates LB PA, MB PA, HB PA, a filter, LNA and a switch, realizes the support of low, medium and high frequency bands (LMH band) simultaneously, supports the M+H double-transmitting function, better saves the occupied area of a PCB and reduces the cost. In one embodiment, the radio frequency front-end device provided by the embodiment of the application at least supports WCDMA B1/B5/B8 frequency bands, LTE B1/B3/B5/B8/B28/B34/B39/B40/B41 frequency bands, and N1/N3/N5/N8/N28/N41 frequency bands. In one embodiment, the radio frequency front-end device provided by the embodiment of the application at least supports two paths of simultaneous transmission of LTE and NR under the combination of B3+N41 ENDC and B39+N41 ENDC. In one embodiment, the radio frequency front end device provided by the embodiments of the present application supports at least the following Carrier (CA) combinations 1-3,3-41,39-41, LB (5, 8,28A, 28B) +M/H (1,3,39,40,41), etc.

In an exemplary embodiment, in order to meet the requirement that the two ENDC power supplies need to be separated independently, in the radio frequency front end device provided by the embodiment of the present application, the HB PA 110 and the MB PA 120 use independent power supply, that is, VCC power supply of the HB PA 110 and the MB PA 120 is physically independent.

In an exemplary embodiment, the radio frequency front end device provided by the embodiment of the application supports 3 antenna ports (ANT ports), namely a low frequency antenna port lb_ant, a middle and high frequency antenna port mhb_ant and a high frequency antenna port hb_ant, and respectively supports the receiving and transmitting of LB, MHB and HB frequency band radio frequency signals. In one embodiment, the high frequency antenna port HB_ANT may be used for M+H ENDC dual-transmit high band transmission (HB Tx), such as for B3/39+N41 ENDC combinations, N41 Tx. In one embodiment, to reduce the switching loss, the high frequency antenna port hb_ant may support only the B40 and B41 bands of conduction, as shown in fig. 3.

In an illustrative example, the radio frequency front end device shown in fig. 1 is further provided with at least one high frequency auxiliary receiving port hb_aux (high frequency auxiliary receiving port hb_aux1 as shown in fig. 1) for external high frequency band extension. Correspondingly, the receiving circuit 150 is further connected to the high-frequency auxiliary receiving port hb_aux, and is further configured to perform low noise amplification processing on the received radio frequency signal from the high-frequency auxiliary receiving port hb_aux connected to the external circuit, and output the signal to a receiving port LNA OUT.

In an illustrative example, as shown in fig. 1, the mid-high frequency auxiliary reception port mhb_aux includes three of a mid-high frequency auxiliary reception port mhb_aux1, a mid-high frequency auxiliary reception port mhb_aux2, and a mid-high frequency auxiliary reception port mhb_aux3.

In an illustrative example, the radio frequency front end device shown in fig. 1 is further provided with at least one intermediate frequency auxiliary transmitting port mb_tx (e.g., intermediate frequency auxiliary transmitting port mb_tx1 in fig. 1), one high frequency auxiliary transmitting port hb_tx (e.g., high frequency auxiliary transmitting port hb_tx1 in fig. 1), at least two intermediate and high frequency auxiliary transceiving ports mhb_trx (e.g., intermediate and high frequency auxiliary transceiving ports mhb_trx1, intermediate and high frequency auxiliary transceiving ports mhb_trx2 in fig. 1) for external intermediate frequency band and high frequency band extension. The intermediate frequency auxiliary transmitting port MB_TX and the high frequency auxiliary transmitting port HB_TX are respectively connected with the intermediate frequency auxiliary receiving and transmitting port MHB_TRX in a one-to-one correspondence manner through an external circuit. In one embodiment, the intermediate frequency auxiliary transmitting port MB_Tx1 is correspondingly connected with one intermediate and high frequency auxiliary receiving and transmitting port MHB_TRX1 through a second external circuit, and the high frequency auxiliary transmitting port HB_Tx1 is correspondingly connected with the other intermediate and high frequency auxiliary receiving and transmitting port MHB_TRX2 through the external circuit. In one embodiment, the radio frequency front-end device provided by the embodiment of the application realizes the support of B2 and B7 frequency bands through the second external circuits such as a B2 duplexer and a B7 duplexer externally hung on the ports of the intermediate frequency auxiliary transmitting port MB TX1 and the high frequency auxiliary transmitting port HB TX 1.

In an illustrative example, the radio frequency front end device shown in fig. 1 is further provided with a 2G high frequency transmission port 2g_hb_in, and the radio frequency front end device shown in fig. 1 further comprises a 2G high frequency power amplifier (2G HB PA) 200,2G high frequency power amplifier 200 connected to the 2G high frequency transmission port 2g_hb_in for power amplifying the 2G high frequency band signal from the 2G high frequency transmission port 2g_hb_in and outputting the power amplified signal to the filter circuit 140. The filter circuit 140 is further configured to perform a filtering process on the received 2G high-band signal and output the filtered signal to the third switch circuit 180. In an exemplary embodiment, the radio frequency front-end device shown in fig. 1 is further provided with a 2G low frequency transmitting port 2g_lb_in, and the radio frequency front-end device shown in fig. 1 further comprises a 2G low frequency power amplifier (2G LB PA) 210,2G, wherein the low frequency power amplifier 210 is connected to the 2G low frequency transmitting port 2g_lb_in, and is configured to power amplify a 2G low frequency band signal from the 2G low frequency transmitting port 2g_lb_in and output the signal to the filter circuit 140. The filter circuit 140 is further configured to filter the received 2G low-band signal and output the filtered signal to the fourth switch circuit 190. In one embodiment, the radio frequency front-end device provided by the embodiment of the application realizes the support of the GSM850/900/1800/1900 frequency band.

In an exemplary embodiment, as shown in fig. 2, a power coupling circuit 220 is disposed between the fourth switching circuit 190 and the low frequency antenna port lb_ant for collecting information about the transmit power, and SPDT switches on the power feedback path are used to cascade power feedback circuits of other PA devices. In one embodiment, as shown in the embodiment of fig. 2, the first power coupling circuit 220 is disposed in the rf path between the fourth switch circuit 190 and the low-frequency antenna port lb_ant, and is configured to couple the low-frequency band signal in the rf path to output the coupled signal through the first coupling output port CPLOUT. Wherein the coupled signal can be used to measure the forward and reverse coupled power of the mid-band signal. The first coupling input port CPLIN may be used for connecting with other external rf front-end devices having coupling output ports, for receiving the coupling signals output by other external rf front-end devices, and outputting the received coupling signals through the first coupling output port CPLOUT1 of the rf front-end device to which the first coupling input port CPLIN1 belongs, so as to implement transmission of other external coupling signals.

In an exemplary embodiment, as shown in fig. 2, a power coupling circuit 230 is disposed between the third switch circuit 180 and the mhb_ant, which is used to collect information about the transmit power, and the SPDT switch on the power feedback path is used to cascade the power feedback circuits of other PA devices. In one embodiment, as shown in the embodiment of fig. 2, the second power coupling circuit 230 is disposed in the rf path between the third switch circuit 180 and the mid-high frequency antenna port mhb_ant, and is used to couple the mid-high frequency band signals in the rf path to output the coupled signals through the second coupling output port CPLOUT. Wherein the coupling signal can be used to measure the forward coupling power and the reverse coupling power of the mid-high band signal. The second coupling input port CPLIN may be used for connecting with other external rf front-end devices having coupling output ports, for receiving the coupling signals output by other external rf front-end devices, and outputting the received coupling signals through the second coupling output port CPLOUT2 of the rf front-end device to which the second coupling input port CPLIN2 belongs, so as to implement transmission of other external coupling signals.

In an exemplary embodiment, as shown in fig. 2, a power coupling circuit 240 is disposed between the third switching circuit 180 and the high frequency antenna port hb_ant, for collecting the transmit power related information, and the SPDT switch on the power feedback path is used to cascade the power feedback circuits of the other PA devices. In one embodiment, as shown in the embodiment of fig. 2, the third power coupling circuit 240 is disposed in the rf path between the third switching circuit 180 and the high-frequency antenna port hb_ant, and is configured to couple the high-frequency band signal in the rf path to output the coupled signal through the third coupling output port CPLOUT. Wherein the coupled signal can be used to measure the forward and reverse coupled power of the mid-band signal. The third coupling input port CPLIN may be used for connecting with other external rf front-end devices having coupling output ports, for receiving the coupling signals output by other external rf front-end devices, and outputting the received coupling signals through the third coupling output port CPLOUT of the rf front-end device to which the third coupling input port CPLIN3 belongs, so as to implement transmission of other external coupling signals.

In an illustrative example, the radio frequency front end device provided by embodiments of the present application may further include three sets of mobile industry processor interface (MIPI, mobile Industry Processor Interface) control signals (not shown in fig. 1) for controlling HB Tx-related circuits such as PA and switches, respectively, LB and MB Tx-related circuits such as PA and switches, respectively, and receive-related circuits such as switch and LNA, respectively.

In an exemplary embodiment, the radio frequency front-end device provided by the embodiment of the application is an L-PA Mid device. The rf front-end device shown IN fig. 1 may be understood as a package structure, as shown IN fig. 3, IN one embodiment, the L-PA Mid device is provided with a high-frequency transmit port hb_in, an intermediate-frequency transmit port mb_in, a low-frequency transmit port lb_in, and at least five receive ports lna_outn (e.g., receive ports lna_out1, lna_out2, lna_out3, lna_out4, and lna_out5 shown IN fig. 1) for connecting an rf transceiver, a low-frequency antenna port lb_ant, a medium-high-frequency antenna port mhb_ant, and a high-frequency antenna port hb_ant for connecting an antenna, and at least one low-frequency auxiliary transmit port lb_tx (e.g., low-frequency auxiliary transmit port lb_tx1 shown IN fig. 1), at least one low-frequency auxiliary transmit port lb_trx (e.g., low-frequency auxiliary transmit port lb_trx1 shown IN fig. 1), and at least one low-frequency auxiliary receive port lb_aux (e.g., low-frequency auxiliary transmit port lb_aux1 shown IN fig. 1) for connecting an external low-frequency band extension, and at least one low-frequency auxiliary transmit port lb_aux_aux 1 (e.g., low-frequency auxiliary transmit port b_aux 1) for external low-frequency band extension or at least one medium-frequency auxiliary transmit port b_b_1) for high-frequency band extension (e.g., mhb_b_1). The receiving port LNA OUT, the high-frequency transmitting port hb_in, the intermediate-frequency transmitting port mb_in, the low-frequency transmitting port lb_in, the low-frequency antenna port lb_ant, the middle-high frequency antenna port mhb_ant and the high-frequency antenna port hb_ant, the low-frequency auxiliary transmitting port lb_tx, the low-frequency auxiliary receiving port lb_trx, the low-frequency auxiliary receiving port lb_aux and the middle-high frequency auxiliary receiving port mhb_aux may be understood as radio-frequency pin terminals of the L-PA Mid device for connection with various external devices. In one embodiment, the low-frequency auxiliary transmitting port lb_tx, the low-frequency auxiliary receiving port lb_trx, the low-frequency auxiliary receiving port lb_aux and the middle-high-frequency auxiliary receiving port mhb_aux are all connected with an external circuit to realize the transmission and the reception of the radio frequency signals in the corresponding frequency bands.

In one illustrative example, the external circuit may be a transmit and receive band diplexer.

As shown in connection with fig. 1 and 3, in one illustrative example, the filtering circuit 140 may include a first filtering circuit, such as a duplexer or multiplexer, and a second filtering circuit, such as a filter, for Frequency Division Duplex (FDD) mode signals, filtering with a corresponding band of diplexers 1411, and for Time Division Duplex (TDD) mode signals, filtering with a corresponding band of filters 1412. In one embodiment, as shown in fig. 3, the B3 band signal is an FDD mode signal, the B3 band signal is filtered by using a B3 duplexer 1411, a second port of the first switch circuit 160 is connected to the Tx port of the B3 duplexer 1411, and the common port of the B3 duplexer 1411 is connected to the middle-high frequency antenna port mhb_ant through the third switch circuit 180. In one embodiment, as shown in fig. 3, the N41/B41 band signal is a TDD mode signal, the N41/B41 band signal is filtered by using an N41/B41 filter 1412, a second port of the first switch circuit 160 is connected to an input terminal of the N41/B41 filter 1412, and an output terminal of the N41/B41 filter 1412 is connected to the high frequency antenna port hb_ant through a third switch circuit 180.

In an exemplary embodiment, as shown in fig. 3, a filter dedicated for receiving signals in the B41/N41 frequency band is further provided for the B41/N41 frequency band, and as shown in B41 RX SAW in fig. 3, one end of the B41/N41 frequency band signal receiving filter is connected to the receiving circuit 150, and the other end is connected to the third switch circuit 180, so that the middle-high frequency antenna port mhb_ant or the high-frequency antenna port hb_ant can be conducted, that is, the L-PA Mid device provided by the embodiment of the present application can support the reception of two paths of signals in the B41/N41 frequency band. In one embodiment, the third switching circuit 180 may further be implemented in a multi-on manner to simultaneously turn on the N41 receive path and the B3 or B39 path, implementing the ENDC combination of B3/39+n41.

IN an exemplary example, as shown IN fig. 3, an input terminal of the HB PA 110 is connected to the high-frequency transmission port hb_in, an output terminal of the HB PA 110 is connected to a first port of the first switching circuit 160, and the HB PA 110 is configured to power amplify a high-frequency band signal from the high-frequency transmission port hb_in and output the first switching circuit 160. In one embodiment, the high-band signal may include at least B40/N40, B41/N41, etc.

IN an exemplary embodiment, as shown IN fig. 3, an input terminal of the MB PA 120 is connected to the intermediate frequency transmitting port mb_in, an output terminal of the MB PA 120 is connected to a first port of the first switch circuit 160, and the MB PA 120 is configured to power amplify the intermediate frequency band signal from the intermediate frequency transmitting port mb_in and output the first switch circuit 160. In one embodiment, the mid-band signal may include at least B34, B39, B3, B1, etc.

In one illustrative example, as shown in fig. 3, the VCC supplies of HB PA 110 and MB PA 120 are physically independent. In one embodiment, HB PA 110 is powered by HB Vcc1, HB Vcc2, MB PA 120 and LB PA 130 are powered by L/M Vcc1, L/M Vcc 2.

IN an exemplary embodiment, as shown IN fig. 3, an input terminal of the LB PA 130 is connected to the low frequency transmitting port lb_in, an output terminal of the LB PA 130 is connected to a first port of the second switching circuit 170, and the LB PA 130 is configured to power amplify a low frequency band signal from the low frequency transmitting port lb_in and output the second switching circuit 170. In one embodiment, the low-band signal may include at least B5, B8, B28A, B B, etc.

In an illustrative example, as shown in fig. 3, an input terminal of the 2G HB PA 200 is connected to the 2G high frequency transmission port 2g_hb_in, and an output terminal of the 2G HB PA 200 is connected to the GSM HB filter in the filter circuit 140, for power amplifying the 2G high frequency band signal from the 2G high frequency transmission port 2g_hb_in and outputting the filter circuit 140. In an illustrative example, as shown in fig. 3, an input terminal of the 2G LB PA 210 is connected to the 2G low frequency transmission port 2g_lb_in, and an output terminal of the 2G LB PA 210 is connected to the GSM LB filter in the filter circuit 140, for power amplifying the 2G low frequency band signal from the 2G low frequency transmission port 2g_lb_in and outputting the filter circuit 140. In one embodiment, the 2G signal may comprise a signal such as the GSM850/900/1800/1900 band.

In one illustrative example, as shown in fig. 3, the first switching circuit 160 may be a 5P7T switch. It should be noted that the specific switch types mentioned in the embodiments of the present application are not intended to limit the protection scope of the present application, but are merely examples. As shown in fig. 3, the five first ports of the first switch circuit 160 are respectively connected to the output terminal of the HB PA 110, the output terminal of the MB PA 120, and the input ports of the receiving circuit 150 corresponding to the three preset frequency bands. In one embodiment, the preset frequency band may include, for example, a B3 frequency band, a B39 frequency band, and an N41 frequency band. Five second ports of the first switch circuit 160 are respectively connected with the filter circuit 140, in one embodiment, the first switch circuit 160 may be respectively connected with a B41/N41 filter, a B40 filter, a B34/B39 filter, a TX end of a B1 duplexer, and a TX end of a B3 duplexer in the filter circuit 140, and the other two second ports of the first switch circuit 160 are respectively connected with the high-frequency auxiliary transmitting port hb_tx1 and the intermediate-frequency auxiliary transmitting port mb_tx1, and the intermediate-frequency auxiliary transmitting port mb_tx1 and the intermediate-high-frequency auxiliary transmitting port hb_tx1 are respectively connected with the intermediate-frequency auxiliary receiving port mhb_trx in a one-to-one correspondence through an external circuit. In one embodiment, the L-PA Mid device provided by the embodiment of the application realizes the support of B2 and B7 frequency bands through external circuits such as a B2 duplexer and a B7 duplexer externally hung on the ports of the intermediate-frequency auxiliary transmitting port MB TX1 and the high-frequency auxiliary transmitting port HB TX 1.

In one embodiment, the L-PA Mid device provided by the embodiment of the present application supports 3 ANT ports, i.e., a low frequency antenna port lb_ant, a middle and high frequency antenna port mhb_ant, and a high frequency antenna port hb_ant, and respectively supports the receiving and transmitting of LB, MHB, and HB frequency band radio frequency signals. In one embodiment, the high frequency antenna port hb_ant may be used for m+h ENDC dual-transmit high band transmission (HB Tx), as shown in fig. 3, such as for B3/39+n41 ENDC combinations, and N41 Tx, in one embodiment, the high frequency antenna port hb_ant may support only the on B40 and B41 bands in order to reduce switching insertion loss.

In one illustrative example, as shown in fig. 3, the second switching circuit 170 may be an SP5T switch. As shown in fig. 3, a first port of the second switching circuit 170 is connected to an output terminal of the LB PA 130, and four second ports of the second switching circuit 170 are respectively connected to the filter circuit 140, and in an embodiment, may be respectively connected to a TX terminal of a B5 duplexer, a TX terminal of a B8 duplexer, a TX terminal of a B28A duplexer, and a TX terminal of a B28B duplexer in the filter circuit 140. The other second port of the first switch circuit 160 is connected to a low-frequency auxiliary transmitting port lb_tx1, the low-frequency auxiliary transmitting port lb_tx1 is correspondingly connected to a low-frequency auxiliary receiving/transmitting port lb_trx1 through an external circuit, and the low-frequency auxiliary transmitting port lb_tx1 is used for selectively conducting a radio frequency path between the LB PA 130 and the external circuit. In one embodiment, the low band signal transmitted through the low frequency auxiliary transmission port lb_tx1 may include, for example, a B12 band signal.

In one illustrative example, as shown in fig. 3, the third switching circuit 180 may be a 2P9T switch. As shown in fig. 3, two first ports of the third switching circuit 180 are connected to the high-frequency antenna port hb_ant and the middle-high-frequency antenna port mhb_ant, respectively. Seven of the nine second ports of the third switch circuit 180 are respectively connected to the filter circuit 140, and in one embodiment, may be respectively connected to a B41/N41 filter, a B40 filter, a B34/B39 filter, a B41/N41 band signal receiving filter, a common terminal of a B1 duplexer, a common terminal of a B3 duplexer, and a GSM HB filter in the filter circuit 140. The other two second ports of the third switch circuit 180 are connected to the intermediate-high frequency auxiliary transmission/reception port mhb_trx1 and the intermediate-high frequency auxiliary transmission/reception port mhb_trx2, respectively. The middle-high frequency auxiliary transceiving port MHB_TRX1 and the middle-high frequency auxiliary transceiving port MHB_TRX2 are respectively connected with the middle-frequency auxiliary transmitting port MB_TX and the high-frequency auxiliary transmitting port HB_TX in a one-to-one correspondence manner through external circuits.

In one illustrative example, as shown in fig. 3, the fourth switch circuit 190 may be a 2P5T switch. As shown in fig. 3, the two first ports of the fourth switch circuit 190 are connected to the low frequency antenna port lb_ant and the low frequency auxiliary transmission/reception port lb_trx1, respectively. The five second ports of the fourth circuit 190 are respectively connected to the filter circuit 140, and in one embodiment may be respectively connected to the common terminal of the B5 diplexer, the common terminal of the B8 diplexer, the common terminal of the B28A diplexer, the common terminal of the B28B diplexer, and the GSM LB filter in the filter circuit 140. The low-frequency auxiliary transceiving port LB_TRX1 and the low-frequency auxiliary transmitting port LB_TX1 are correspondingly connected through an external circuit and are used for selectively conducting a radio frequency path between the LB PA 130 and the external circuit. In one embodiment, the low band signal transmitted through the low frequency auxiliary transmit-receive port lb_trx1 may include, for example, a B12 band signal.

In one illustrative example, the receive circuit 150 may include at least four low noise amplifiers 1514, at least two first switch units 1511, a second switch unit 1512, a third switch unit 1513, and a fourth switch unit 1515, where,

The low noise amplifier 1514 included in the receiving circuit 150 includes at least one HB LNA, such as LNA1 in the embodiment shown in fig. 3, the input end of the LNA1 is connected to a first port of a third switch unit 1513 (such as a third switch unit SP2T in the embodiment shown in fig. 3), a second port of the third switch unit SP2T is connected to the high-frequency auxiliary receiving port hb_aux1, another second port of the third switch unit SP2T is connected to a first port (such as a B40/41RX port in the embodiment shown in fig. 3) of the first switch circuit 160, the output end of the LNA1 is connected to a second port of a fourth switch unit 1515, and the low noise amplifier LNA1 is configured to amplify the received high-frequency band signal and output the amplified signal to a receiving port LNA OUT (such as any one of the receiving ports LNA OUT1 to LNA OUT4 in the embodiment shown in fig. 3) through the fourth switch unit 1515.

The low noise amplifier 1514 included in the receive circuit 150 includes at least two MHB LNAs. Such as LNA2 and LNA3 in the embodiment shown in fig. 3. Wherein,

The input end of the LNA2 is connected to a first port of a first switch unit 1511 (e.g., a first switch unit SP5t#1 in the embodiment shown in fig. 3), two second ports of the first switch unit SP5t#1 are respectively connected to a middle-high frequency auxiliary port mhb_aux1 and a middle-high frequency auxiliary port mhb_aux2, the other three second ports of the first switch unit SP5t#1 are respectively connected to a first port of the first switch circuit 160 (e.g., a B34 RX port in the embodiment shown in fig. 3), and the output end of the LNA2 is connected to a second port of the fourth switch unit 1515, and the LNA2 is used for amplifying the received middle-high frequency signal and outputting the amplified signal to a receiving port OUT (e.g., any receiving port LNA 1 to OUT4 in the embodiment shown in fig. 3) through the fourth switch unit 1515;

The input end of the LNA3 is connected to a first port of a second switch unit 1512 (e.g., a second switch unit SP3T in the embodiment shown in fig. 3), one second port of the second switch unit SP3T is connected to a middle-high frequency auxiliary port mhb_aux3, the other two second ports of the second switch unit SP3T are respectively connected to a first port (e.g., a B39 RX port in the embodiment shown in fig. 3) of the first switch circuit 160, the RX end of the B3 duplexer in the filter circuit 140 is connected, the output end of the LNA3 is connected to a second port of a fourth switch unit 1515, and the LNA2 is configured to amplify the received middle-high frequency band signal and output the amplified signal to a receiving port LNA OUT (e.g., any receiving port OUT1 to LNA OUT4 in the embodiment shown in fig. 3) through the fourth switch unit 1515.

The L-PA Mid device provided by the embodiment of the present application at least supports one intermediate frequency auxiliary transmitting port MB TX, one high frequency auxiliary transmitting port HB TX, two middle and high frequency auxiliary receiving ports MHB TRX ports, and 3 high frequency auxiliary receiving ports HB AUX1, middle and high frequency auxiliary receiving ports MHB AUX2 and middle and high frequency auxiliary receiving ports MHB AUX3 connected to the LNA, and the duplexer of the external corresponding frequency band of these auxiliary transmitting/receiving ports is used to realize the receiving/transmitting of the signal of the frequency band, such as the B2 frequency band signal, the B7 frequency band signal, and the MIMO receiving path of the corresponding frequency band, such as the B1 frequency band signal, the B3 frequency band signal.

The low noise amplifier 1514 included in the receiving circuit 150 includes at least one LNA, such as LNA4 in the embodiment shown in fig. 3, the input end of the LNA4 is connected to a first port of a first switch unit 1511 (such as the first switch unit SP5t#2 in the embodiment shown in fig. 3), a second port of the first switch unit SP5t#2 is connected to the low frequency auxiliary receiving port lb_aux1, and the other four second ports of the first switch unit SP5t#2 are respectively connected to the RX end of the B5 duplexer, the RX end of the B8 duplexer, the RX end of the B28A duplexer, and the RX end of the B28B duplexer in the filter circuit 140, and the output end of the LNA4 is connected to a receiving port LNA OUT (such as the receiving port LNA OUT4 in the embodiment shown in fig. 3), where the LNA4 is used for amplifying the received low frequency band signal and outputting to the receiving port OUT (such as the receiving port OUT5 in the embodiment shown in fig. 3).

The L-PA Mid device provided by the embodiment of the present application supports at least one low-frequency auxiliary transmitting port LB TX, one low-frequency auxiliary receiving/transmitting port LB TRX, and one low-frequency auxiliary receiving port LB AUX1 port connected to an LB LNA (e.g., LNA4 in fig. 3), where the low-frequency auxiliary transmitting port LB TX1, the low-frequency auxiliary receiving/transmitting port LB TRX1, and the low-frequency auxiliary receiving port LB AUX1 shown in fig. 3 may be used to implement the receiving/transmitting of signals supporting the frequency band through a duplexer that is externally connected to the corresponding frequency band.

In an exemplary embodiment, the fourth switch unit 1515 may be a full-function multi-P multi-T switch, and may be turned on as required, as shown in fig. 3, and the fourth switch unit 1515 is a fourth switch unit 3P4T full-function switch. Three first ports of the fourth switch unit 3P4T are respectively connected with the output ends of the LNA1, the LNA2 and the LNA3, and four second ports of the fourth switch unit 3P4T are respectively connected with the receiving ports LNA OUT1, the receiving ports LNA OUT2, the receiving ports LNA OUT3 and the receiving ports LNA OUT 4.

In one illustrative example, two received signals of the same frequency band require the use of different LNAs and different receive ports LNA OUT. In one embodiment, the L-PA Mid device provided by the embodiments of the present application supports at least the CA combination of 1-3,3-41,39-41, LB (5, 8,28A, 28B) +M/H (1,3,39,40,41), and the like. It should be noted that, when the CA combines several paths of received signals, different LNAs and different receiving ports LNA OUT are also required, as shown in fig. 3, only one exemplary allocation is performed on the frequency bands connected to each LNA to satisfy the CA combination and MIMO frequency bands that need to be supported, but the example shown in fig. 3 is not intended to limit the protection scope of the present application.

The L-PA Mid device supporting the LMH band simultaneously integrates the LBPA, the MB PA, the HB PA, the filter, the LNA and the switch, realizes the support of low-medium-high frequency bands (LMH band) simultaneously, supports the M+H double-shot function, better saves the occupied area of a PCB board and reduces the cost. Compared with the 5G version scheme in the related art, the L-PA Mid device provided by the embodiment of the application saves about 100 square millimeters (mm ²) in area, reduces about dollar 1 in cost because one ENDC PA is saved, and simultaneously reduces the complexity of a circuit supporting the B3/39+N41 ENDC combination.

The signal workflow of the L-PA Mid device provided by the embodiment of the present application is described below by way of example with the combination of rf signals, the external filter path, and ENDC in the L-PA Mid device provided by the embodiment of the present application.

Taking the GSM900 band as an example, a GSM900 band signal transmitted from a radio frequency transceiver (transceiver) (not shown in the figure) enters the L-PA Mid device through a 2g_lb_in port, then the GSM900 radio frequency signal is amplified by the 2g LB PA 210, and the amplified GSM900 signal enters a GSM LB filter in the filter circuit 140 to be filtered, and then enters the fourth switch circuit 190 to be selectively conducted to the low frequency antenna port LB ANT to connect with an external antenna.

Taking the B1 frequency band as an example, the transmitting process of the B1 frequency band signal includes that the B1 frequency band signal transmitted from the transceiver enters the L-PA Mid device through the intermediate frequency transmitting port mb_in port, then the B1 frequency band signal is amplified through the MB PA 120, then the B1 frequency band signal is conducted to the TX end of the B1 duplexer for filtering through the frequency band selecting switch such as the first switch circuit 160 IN fig. 3, and finally the common end of the B1 duplexer is connected to the third switch circuit 180 to select the MHB ANT conducted to the middle-high frequency antenna port for connecting with the external antenna to transmit the B1 frequency band signal. In this embodiment, as shown in fig. 3, before the B1 band signal reaches the MHB ANT, the B1 band signal is collected by the power coupler 230 and connected to the transceiver through the CPLOUT port. The receiving process of the B1 band main set received signal includes that after the B1 band main set signal enters from the middle high frequency antenna port MHB ANT, the B1 band main set signal enters the B1 duplexer from the common end of the B1 duplexer through the third switch circuit 180 to perform filtering processing, and then is connected to the receiving circuit 150 through the RX end of the B1 duplexer to perform signal amplification, as shown in fig. 3, in this embodiment, the RX end of the B1 duplexer is connected to a second port of the first switch unit SP5t#1, the filtered B1 band main set signal is output to the LNA2 through the first end of the first switch unit SP5t#1, and after the amplifying processing, the filtered B1 band main set signal is output to the receiving port of the transducer from a certain receiving port of the receiving ports LNA OUT1 to LNA OUT4 through the fourth switch unit 1515. The B1 band MIMO signal coming to the external receiving path, such as the external circuit B1 duplexer, may be connected to the L-PA Mid device through a certain port of the middle-high frequency auxiliary receiving ports MHB AUX1 to MHB AUX3, as shown in fig. 3, in this embodiment, the B1 band MIMO signal is connected to the receiving circuit 150 of the L-PA Mid device through the middle-high frequency auxiliary receiving port MHB AUX3, as shown in fig. 3, in this embodiment, the middle-high frequency auxiliary receiving port MHB AUX3 is connected to a second port of the second switch unit SP3T through an internal wiring, the B1 band MIMO signal is output to the LNA3 through a first end of the second switch unit SP3T, and is output to the receiving port of the transducer from a certain receiving port of the receiving ports LNA OUT1 to LNA OUT4 through the fourth switch unit 1515 after being amplified.

Taking the external B12 band as an example, the transmitting process of the B12 band signal includes that the B12 band signal transmitted from the transceiver enters the L-PA Mid device through the low frequency transmitting port lb_in, then the B12 band signal is amplified through the LB PA 130, then conducted to the low frequency auxiliary transmitting port lb_tx1 through the band selecting switch such as the second switch circuit 170 IN fig. 3 to be connected to the external filter such as the B12 duplexer (not shown IN fig. 3) for filtering, and finally connected to the fourth switch circuit 190 through the common end of the external B12 duplexer for selecting the low frequency antenna port LB ANT for connecting the external antenna to transmit the B12 band signal. The receiving process of the B12 band main set receiving signal includes that after the B12 band main set signal enters from the low frequency antenna port LB ANT, the B12 band main set signal is output from the low frequency auxiliary receiving and transmitting port LB TRX1 to the public end of the external B12 duplexer through the fourth switch 190, filtered by the B12 duplexer, and then connected from the RX end of the B12 duplexer to the low frequency auxiliary receiving port LB MUX1 to enter the receiving circuit 150, as shown in fig. 3, in this embodiment, the RX end of the B12 duplexer is connected to a second port of the first switch unit SP5t#2, the filtered B12 band main set signal is output to the LNA4 through the first end of the first switch unit SP5t#2, amplified and then output to the receiving port of the transceiver through the LNA OUT 15.

Taking the combination of b3+n41 as an example, the transmitting process of the B3 frequency band signal and the receiving process of the B3 main set received signal are the same as those of the B1 frequency band signal, and will not be described herein again. The transmitting process of the N41 band signal may include that the N41 band signal transmitted from the transceiver enters the L-PA Mid device through the high frequency transmitting port hb_in, then the N41 radio frequency signal is amplified through the HB PA 110, then the N41 band signal is conducted through the band selecting switch such as the first switch circuit 160 IN fig. 3, and enters the B41/N41 filter for filtering, and then the filtered N41 band signal is selectively conducted to the high frequency antenna port HB ANT through the third switch circuit 180 to connect with the external antenna for transmitting the N41 band signal. In this embodiment, as shown in fig. 3, before the N41 band signal reaches the high-frequency antenna port HB ANT, the N41 band signal is collected by the power coupler 240, and is connected to the transceiver through the CPLOUT port. The receiving process of the N41-band main set receiving signal may include that after the N41-band main set signal enters from the high-frequency antenna port HB ANT, the N41-band main set signal enters the N41 filter through the third switch circuit 180 to be filtered, is connected to a second end of the first switch circuit 160 through the N41-receiving filter, and is conducted to a first end, namely, a B49/41RX end through selection of the first switch circuit 160, as shown in fig. 3, in this embodiment, the filtered N41-band main set signal is connected to a second end of the third switch unit SP2T of the receiving circuit 150, the filtered N41-band main set signal is output to the LNA1 through the first end of the third switch unit SP2T, and is output to a receiving port of the transducer through a certain receiving port of the receiving ports LNA OUT 1-LNA OUT4 after being amplified. The receiving process of the N41 band MIMO signal includes that the N41 band MIMO signal enters from the intermediate high frequency antenna port MHB ANT and is selectively connected to the N41 receiving filter through the third switch circuit 180 to be filtered, in this embodiment, because the N41 receiving filter is turned on while the B3 band signal channel is kept on in a multi-on manner, and is connected to the receiving circuit 150 through the B41 MRX end of the N41 receiving filter, as shown in fig. 3, the B41 MRX end of the N41 receiving filter is connected to a second end of the first switch unit SP5t#1, the filtered N41 band main set signal is output to the LNA2 through a first end of the first switch unit SP5t#1, and is output to a receiving port of the transceiver through a certain receiving port of the receiving ports LNA OUT1 to LNA OUT4 after being amplified.

It should be noted that, in this embodiment, if MIMO reception is to be supported by the B3 band signal under the b3+n41 ENDC combination, the implementation of the LNA in the L-PA Mid device provided by the embodiment of the present application cannot be achieved, because in this case, two LNAs in the receiving circuit 150 need to be used for the N41 band signal, and one LNA is needed for the B3 band main set reception, that is, one LNA1 in the high band and two LNAs 2 and 3 in the middle and high bands are occupied.

IN the case of N41 band pure independent networking (SA only, standalone only) operation, the transmission path of the N41 radio frequency signal may have two modes, that is, the first mode is the same as the mode of receiving and transmitting the N41 band signal under the above-mentioned b3+n41 combination, and is not described here again, and IN the second mode, the transmitting process of the N41 band signal may include that the N41 band signal enters the L-PA Mid device through the high frequency transmitting port hb_in, then the HB PA 110 amplifies the N41 band signal, then the first switching circuit 160 performs band selection conduction to enter the B41/N41 filter for filtering, and finally the third switching circuit 180 selects conduction to connect to the middle-high frequency antenna port MHB ANT for connecting to the external antenna. In this embodiment, as shown in fig. 3, before the N41 band signal reaches the MHB ANT, the N41 band signal is collected by the power coupler 230 and connected to the transceiver through the CPLOUT port. The receiving process of the N41-band main set signal may include that the N41-band main set signal enters the N41 filter through the selection of the third switch circuit 180 after entering from the middle high frequency antenna port MHB ANT, then is connected to the LNA1 through the frequency band selection of the first switch circuit 160 and the third switch unit SP2T in the receiving circuit 150 for signal amplification, and finally is output and connected to the transceiver receiving port through a certain port of the receiving ports LNA OUT1 to LNA OUT 4. The receiving process of the N41 band MIMO signal may include that after the N41 band MIMO signal enters from the high frequency antenna port HB ANT, the N41 band MIMO signal is selectively turned on to the N41 receiving filter for filtering by the third switch circuit 180, and then is connected to the LNA2 through the first switch unit SP5t#1 in the receiving circuit 150 for signal amplification, and finally is output and connected to the receiver receiving port through a certain port of the receiving ports LNA OUT1 to LNA OUT 4.

It should be noted that, in the present application, the frequency band described in the form of Bx also refers to a 5G NR frequency band, such as the described B41 frequency band, and also refers to an N41 frequency band, and further refers to a B41 frequency band receiving filter as described, and also refers to an N41 frequency band receiving filter.

The embodiment of the application also provides electronic equipment, which is provided with the radio frequency front-end device according to any one of the embodiments, and the occupation area of the PCB is better saved and the cost is reduced by arranging the radio frequency front-end device on the electronic equipment. In one embodiment, the electronic device provided by the embodiment of the application at least supports WCDMA B1/B5/B8 frequency band, LTE B1/B3/B5/B8/B28/B34/B39/B40/B41 frequency band, N1/N3/N5/N8/N28/N41 frequency band. In one embodiment, the electronic device provided by the embodiment of the application at least supports two paths of simultaneous transmission of LTE and NR under the combination of B3+N41 ENDC and B39+N41 ENDC. In one embodiment, the electronic device provided by the embodiment of the application supports at least the following Carrier (CA) combinations of 1-3,3-41,39-41, LB (5, 8,28A, 28B) +M/H (1,3,39,40,41), and the like. In an exemplary embodiment, the electronic device provided by the embodiment of the application is various electronic devices with wireless communication functions, including, but not limited to, a mobile phone, a tablet computer, a wearable device, a vehicle-mounted device, an augmented Reality (AR, augmented Reality)/Virtual Reality (VR) device, a notebook computer, an Ultra-mobile Personal computer (UMPC, ultra-Mobile Personal Computer), a netbook, a Personal digital assistant (PDA, personal DIGITAL ASSISTANT), and the like, and the embodiment of the application does not limit the specific type of the electronic device.

Although the embodiments of the present application are described above, the embodiments are only used for facilitating understanding of the present application, and are not intended to limit the present application. Any person skilled in the art can make any modification and variation in form and detail without departing from the spirit and scope of the present disclosure, but the scope of the present disclosure is to be determined by the appended claims.

Claims

1. The radio frequency front end device is characterized by comprising a high-frequency transmitting port, an intermediate-frequency transmitting port, a low-frequency transmitting port, at least five receiving ports, a low-frequency antenna port, a medium-high frequency antenna port, a high-frequency antenna port, at least one low-frequency auxiliary transmitting port, at least one low-frequency auxiliary receiving port and at least one low-frequency auxiliary receiving port, wherein the low-frequency auxiliary transmitting port, the medium-high frequency antenna port, the high-frequency antenna port, the at least one low-frequency auxiliary transmitting port, the at least one low-frequency auxiliary receiving port and the at least one low-frequency auxiliary receiving port are used for external low-frequency band expansion, the low-frequency auxiliary transmitting port and the low-frequency auxiliary receiving port are used for external medium-high-frequency band expansion, the low-frequency auxiliary transmitting port and the low-frequency auxiliary receiving port are in one-to-one correspondence through a first external circuit, and the radio frequency front end device comprises:

The receiving circuit is connected with the receiving port, the low-frequency auxiliary receiving port, the middle-high frequency auxiliary receiving port and the filtering circuit, and is used for carrying out low-noise amplification processing on received MIMO signals from the low-frequency auxiliary receiving port and the middle-high frequency auxiliary receiving port and outputting the MIMO signals to one receiving port, and carrying out amplification processing on radio frequency signals from the filtering circuit and outputting the signals to one receiving port;

The transmitting circuit comprises a high-frequency power amplifier, an intermediate-frequency power amplifier, a low-frequency power amplifier, a first switch circuit and a second switch circuit, wherein,

The high-frequency power amplifier is connected with the high-frequency emission port and is used for amplifying the power of the high-frequency band signal from the high-frequency emission port and outputting the high-frequency band signal to the first switch circuit;

the intermediate frequency power amplifier is connected with the intermediate frequency transmitting port and is used for amplifying the power of an intermediate frequency signal from the intermediate frequency transmitting port and outputting the intermediate frequency signal to the first switching circuit;

the low-frequency power amplifier is connected with the low-frequency emission port and is used for amplifying the power of the low-frequency band signal from the low-frequency emission port and outputting the second switch circuit;

The first switch circuit is characterized in that a plurality of second ports of the first switch circuit are respectively connected with the filter circuit, a first port of the first switch circuit is connected with the output end of the high-frequency power amplifier and is used for selecting and conducting a radio-frequency channel between the high-frequency power amplifier and the filter circuit, the other first port of the first switch circuit is connected with the output end of the intermediate-frequency power amplifier and is used for selecting and conducting the radio-frequency channel between the intermediate-frequency power amplifier and the filter circuit, the rest first ports of the first switch circuit are connected with the receiving circuit and are used for selecting and conducting the radio-frequency channel of a preset frequency band between the filter circuit and the receiving circuit;

The second switch circuit is characterized in that a plurality of second ports of the second switch circuit are respectively connected with the filter circuit, a first port of the second switch circuit is connected with the output end of the low-frequency power amplifier and used for selecting and conducting a radio-frequency channel between the low-frequency power amplifier and the filter circuit, and a second port of the second switch circuit is connected with the low-frequency auxiliary transmitting port and used for selecting and conducting a radio-frequency channel between the low-frequency power amplifier and the first external circuit.

2. The radio frequency front end device of claim 1, wherein the switching circuit comprises a third switching circuit, a fourth switching circuit;

the filter circuit is used for performing filter processing on the received high-frequency band signals and the received intermediate-frequency band signals and outputting the signals to the third switch circuit, and performing filter processing on the received low-frequency band signals and outputting the signals to the fourth switch circuit;

The third switch circuit is characterized in that a plurality of second ports of the third switch circuit are respectively connected with the filter circuit, a first port of the third switch circuit is connected with the high-frequency antenna port and used for selectively conducting a radio-frequency channel between the filter circuit and the high-frequency antenna port, and the other first port of the third switch circuit is connected with the medium-high-frequency antenna port and used for selectively conducting the radio-frequency channel between the filter circuit and the medium-high-frequency antenna port;

The second ports of the fourth switch circuit are respectively connected with the filter circuit, a first port of the fourth switch circuit is connected with the low-frequency antenna port and used for selectively conducting a radio-frequency channel between the filter circuit and the low-frequency antenna port, and a second port of the fourth switch circuit is connected with the low-frequency auxiliary receiving-transmitting port and used for selectively conducting a radio-frequency channel between the first external circuit and the low-frequency antenna port.

3. The radio frequency front end device of claim 1, wherein the high frequency power amplifier and the intermediate frequency power amplifier are each independently powered.

4. The RF front-end device according to claim 2, further provided with at least one high-frequency auxiliary receiving port for external high-frequency band extension;

The receiving circuit is also connected with the high-frequency auxiliary receiving port, and is also used for carrying out low-noise amplification processing on the received radio-frequency signals from the high-frequency auxiliary receiving port and outputting the signals to one receiving port.

5. The RF front-end device of claim 2, further comprising at least one IF auxiliary transmitting port, one HF auxiliary transmitting port, at least two IF auxiliary receiving and transmitting ports for external IF and HF expansion;

The intermediate frequency auxiliary transmitting port and the high frequency auxiliary transmitting port are respectively connected with the intermediate frequency auxiliary receiving and transmitting port in a one-to-one correspondence manner through a second external circuit.

6. The radio frequency front end device of claim 5, wherein the second external circuit comprises a B2 diplexer and/or a B7 diplexer.

7. The radio frequency front end device of claim 2, further provided with a 2G high frequency transmit port;

the radio frequency front-end device further comprises a 2G high-frequency power amplifier, wherein the 2G high-frequency power amplifier is connected with the 2G high-frequency transmitting port and is used for amplifying the power of a 2G high-frequency band signal from the 2G high-frequency transmitting port and outputting the signal to the filter circuit;

the filter circuit is also used for carrying out filter processing on the received 2G high-frequency band signal and outputting the signal to the third switch circuit;

And/or the number of the groups of groups,

The radio frequency front-end device is also provided with a 2G low-frequency emission port;

The radio frequency front-end device further comprises a 2G low-frequency power amplifier, wherein the 2G low-frequency power amplifier is connected with the 2G low-frequency transmitting port and is used for amplifying the power of a 2G low-frequency band signal from the 2G low-frequency transmitting port and outputting the signal to the filter circuit;

The filter circuit is also used for performing filter processing on the received 2G low-frequency band signal and outputting the signal to the fourth switch circuit.

8. The RF front-end device of claim 2, further comprising a first coupling output port, wherein the RF front-end device further comprises a first power coupling circuit disposed in an RF path between the fourth switching circuit and the low frequency antenna port for coupling a low frequency band signal in the RF path to output a coupled signal via the first coupling output port;

The radio frequency front-end device further comprises a second power coupling circuit, a second power coupling circuit and a second power coupling circuit, wherein the second power coupling circuit is arranged in a radio frequency path between the third switch circuit and the middle-high frequency antenna port and is used for coupling a middle-high frequency band signal in the radio frequency path so as to output a coupling signal through the second coupling output port;

And/or the radio frequency front-end device is also provided with a third coupling output port, and the radio frequency front-end device further comprises a third power coupling circuit which is arranged in a radio frequency path between the third switching circuit and the high-frequency antenna port and is used for coupling a high-frequency band signal in the radio frequency path so as to output a coupling signal through the third coupling output port.

9. The radio frequency front-end device of any of claims 1-8, wherein the radio frequency front-end device is an L-PA Mid device.

10. The radio frequency front end device of claim 9, wherein the filter circuit comprises a diplexer and/or multiplexer, and a filter.

11. The radio frequency front-end device of claim 10, wherein the filter comprises an N41/B41 filter and a B41/N41 band signal receiving filter, both for filtering the N41/B41 band signal;

The input end of the N41/B41 filter is connected with a second port of the first switch circuit, and the output end of the N41/B41 filter is connected with the high-frequency antenna port through the third switch circuit;

and one end of the B41/N41 frequency band signal receiving filter is connected with the receiving circuit, and the other end of the B41/N41 frequency band signal receiving filter is connected with the third switching circuit and is used for conducting the medium-high frequency antenna port or the high-frequency antenna port.

12. The radio frequency front-end device of claim 9, wherein the high-band signal comprises one or any combination of B40/N40, B41/N41 bands;

The intermediate frequency signal comprises one or any combination of the following frequency bands B34, B39, B3 and B1;

The low frequency band signal comprises one or any combination of B5, B8, B28A, B and B frequency band.

13. The rf front-end device of claim 9, wherein the first switching circuit is a 5P7T switch;

Five first ports of the first switch circuit are respectively connected with the output end of the high-frequency power amplifier, the output end of the intermediate-frequency power amplifier and the input ports of the receiving circuit, which correspond to three preset frequency bands;

Five of the seven second ports of the first switch circuit are respectively connected with the filter circuit, the other two second ports are respectively connected with the high-frequency auxiliary transmitting port of the radio-frequency front-end device and the intermediate-frequency auxiliary transmitting port of the radio-frequency front-end device, and the intermediate-frequency auxiliary transmitting ports and the high-frequency auxiliary transmitting ports are respectively connected with the intermediate-frequency and high-frequency auxiliary receiving and transmitting ports in a one-to-one correspondence manner through an external circuit.

14. The radio frequency front-end device of claim 13, wherein the preset frequency band comprises a B3 frequency band, a B39 frequency band, an N41 frequency band;

the five second ports are respectively connected with a B41/N41 filter, a B40 filter, a B34/B39 filter, a TX end of a B1 duplexer and a TX end of a B3 duplexer in the filter circuit.

15. The radio frequency front end device of claim 9, wherein the second switching circuit is an SP5T switch;

The first port of the second switching circuit is connected with the output end of the low-frequency power amplifier, four second ports of the second switching circuit are respectively connected with the filter circuit, and the other second port is connected with the low-frequency auxiliary emission port.

16. The radio frequency front end device of claim 15, wherein the four second ports are respectively connected to a TX end of a B5 diplexer, a TX end of a B8 diplexer, a TX end of a B28A diplexer, and a TX end of a B28B diplexer in the filter circuit;

The low-frequency band signal transmitted by the low-frequency auxiliary transmitting port comprises a B12 band signal.

17. The radio frequency front end device according to claim 9, wherein two first ports of the third switch circuit are respectively connected with the high frequency antenna port and the medium and high frequency antenna port, seven second ports of the third switch circuit are respectively connected with the filter circuit, the other two second ports are respectively connected with two medium and high frequency auxiliary receiving and transmitting ports of the radio frequency front end device, and the two medium and high frequency auxiliary receiving and transmitting ports are respectively connected with an intermediate frequency auxiliary transmitting port and a high frequency auxiliary transmitting port of the radio frequency front end device in a one-to-one correspondence through an external circuit.

18. The radio frequency front end device of claim 17, wherein the seven second ports are respectively connected with a B41/N41 filter, a B40 filter, a B34/B39 filter, a B41/N41 band signal receiving filter, a common terminal of a B1 duplexer, a common terminal of a B3 duplexer, a GSM HB filter in the filter circuit.

19. The radio frequency front end device according to claim 9, wherein two first ports of the fourth switching circuit are respectively connected with the low frequency antenna port and the low frequency auxiliary receiving and transmitting port, and five second ports of the fourth switching circuit are respectively connected with the filter circuit.

20. The radio frequency front end device of claim 19, wherein the five second ports are respectively connected to a common terminal of a B5 diplexer, a common terminal of a B8 diplexer, a common terminal of a B28A diplexer and a common terminal of a B28B diplexer, a GSM LB filter in the filter circuit.

21. The radio frequency front end device of claim 9, wherein the receive circuit comprises at least four low noise amplifiers, at least two first switching units, a second switching unit, a third switching unit, and a fourth switching unit, wherein,

The low-noise amplifier comprises at least one high-frequency band low-noise amplifier and is used for amplifying a received high-frequency band signal and outputting the high-frequency band signal to a receiving port through the fourth switch unit; the input end of the high-frequency band low-noise amplifier is connected with the first port of the third switch unit, a second port of the third switch unit is connected with the high-frequency auxiliary receiving port, the other second port of the third switch unit is connected with the first port of the first switch circuit, and the output end of the high-frequency band low-noise amplifier is connected with the second port of the fourth switch unit;

the low noise amplifier comprises at least two middle-high frequency band low noise amplifiers,

The input end of the middle-high frequency band low noise amplifier is connected with a first port of a first switch unit, two second ports of the first switch unit are respectively connected with two middle-high frequency auxiliary ports, the other three second ports of the first switch unit are respectively connected with a first port of a first switch circuit, and the output end of the B41/N41 frequency band signal receiving filter and the RX end of a B1 duplexer in the filter circuit, wherein the output end of the middle-high frequency band low noise amplifier is connected with a second port of the fourth switch unit;

The input end of the other middle-high frequency band low noise amplifier is connected with the first port of the second switch unit, one second port of the second switch unit is connected with one high frequency auxiliary port, the other two second ports of the second switch unit are respectively connected with one first port of the first switch circuit and the RX end of the B3 duplexer in the filter circuit, and the output end of the other middle-high frequency band low noise amplifier is connected with one second port of the fourth switch unit;

The low-noise amplifier comprises at least one low-frequency-band low-noise amplifier, wherein the low-noise amplifier is used for amplifying a received low-frequency-band signal and outputting the amplified low-frequency-band signal to one receiving port, the input end of the low-frequency-band low-noise amplifier is connected with a first port of another first switch unit, a second port of the other first switch unit is connected with the low-frequency auxiliary receiving port, and the other four second ports of the other first switch unit are respectively connected with an RX end of a B5 duplexer, an RX end of a B8 duplexer, an RX end of a B28A duplexer and an RX end of a B28B duplexer in the filter circuit, and the output end of the low-frequency-band low-noise amplifier is connected with one receiving port.

22. The radio frequency front-end device of claim 21, wherein three first ports of the fourth switching unit are respectively connected to the output ends of the high-band low noise amplifier and the two middle-high band low noise amplifiers, and four second ports of the fourth switching unit are respectively connected to four receiving ports.

23. An electronic device comprising the radio frequency front end device of any one of claims 1-22.