Transmitter, receiver, radio frequency transceiving system and interference signal suppression method

Abstract

The invention provides a radio frequency transceiver system and an interference signal suppression method thereof, and the transmitter system comprises a first power divider which divides a local oscillator signal into a first local oscillator signal and a second local oscillator signal; the first bridge divides an intermediate-frequency input signal into an intermediate-frequency I + signal and an intermediate-frequency Q + signal. The first filter divides the first local oscillator signal into a local oscillator I + signal and a local oscillator Q-signal; the first frequency mixer mixes the intermediate frequency I + signal and the local oscillator I + signal to obtain a first frequency mixing signal; the second frequency mixer mixes the intermediate frequency Q + signal and the local oscillator Q-signal to obtain a second frequency mixing signal; the second power divider synthesizes the first frequency mixing signal and the second frequency mixing signal to obtain a first signal to be coupled; the first phase shift amplification module performs phase shift and amplification on the second local oscillator signal to obtain a second to-be-coupled signal; the first coupler couples the first to-be-coupled signal and the second to-be-coupled signal and outputs a radio frequency signal. According to the technical scheme of the embodiment, the design complexity can be reduced, and the performance of the radio frequency transceiving system is improved.

Description

Technical Field

[0001] The present invention relates to the field of radio frequency transceiver technology, and in particular to a transmitter, a receiver, a radio frequency transceiver system and an interference signal suppression method. Background Art

[0002] In the prior art, the frequency of the local oscillator signal of the frequency conversion of the transmitter and receiver of the phased array radar is very close to the frequency of the RF signal. The filter has high difficulty in suppressing the local oscillator signal and the image signal, is large in size, and has a small bandwidth of the transceiver front-end system. For broadband applications, the local oscillator signal falls directly within the RF operating band, making it impossible to use the filter, resulting in poor performance of the RF transceiver system. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a transmitter, a receiver, a radio frequency transceiver system and an interference signal suppression method, which can improve the performance of the radio frequency transceiver system without installing an additional filter group.

[0004] In a first aspect, an embodiment of the present invention provides a transmitter system, including:

[0005] A first power divider, used for dividing the local oscillator signal into a first local oscillator signal and a second local oscillator signal;

[0006] A first bridge, used for dividing an intermediate frequency input signal into an intermediate frequency I+ signal and an intermediate frequency Q+ signal;

[0007] A first filter, used for dividing the first local oscillator signal into a local oscillator I+ signal and a local oscillator Q- signal;

[0008] A first mixer, used for mixing the intermediate frequency I+ signal and the local oscillator I+ signal to obtain a first mixed signal;

[0009] A second mixer, used for mixing the intermediate frequency Q+ signal and the local oscillator Q- signal to obtain a second mixed signal;

[0010] A second power divider, used for synthesizing the first mixing signal and the second mixing signal to obtain a first signal to be coupled;

[0011] A first phase-shifting and amplifying module, used for performing phase shifting and amplifying on the second local oscillator signal to obtain a second signal to be coupled;

[0012] The first coupler is used to couple the first signal to be coupled and the second signal to be coupled to output a radio frequency signal.

[0013] In some embodiments of the present invention, the first phase-shift amplification module includes:

[0014] A first phase shifter, configured to shift the phase of the second local oscillator signal;

[0015] The first amplifier is used to amplify the gain of the second local oscillator signal after the phase shift.

[0016] In a second aspect, an embodiment of the present invention provides a receiver system, characterized in that it includes:

[0017] A third power divider, used for dividing the local oscillator signal into a first local oscillator signal and a second local oscillator signal;

[0018] A second bridge, used for dividing the RF input signal into a RF I+ signal and a RF Q+ signal;

[0019] A second filter, used for dividing the first local oscillator signal into a local oscillator I+ signal and a local oscillator Q+ signal;

[0020] A third mixer, used for mixing the radio frequency I+ signal and the local oscillator I+ signal to obtain a third mixed signal;

[0021] a fourth mixer, configured to mix the radio frequency Q+ signal and the local oscillator Q+ signal to obtain a fourth mixed signal;

[0022] a fourth power divider, configured to synthesize the third mixing signal and the fourth mixing signal to obtain a third signal to be coupled;

[0023] A second phase-shifting and amplifying module, used for performing phase shifting and amplifying on the second local oscillator signal to obtain a fourth signal to be coupled;

[0024] The second coupler is used to couple the third signal to be coupled and the fourth signal to be coupled, and output an intermediate frequency signal.

[0025] In some embodiments of the present invention, the second phase-shift amplification module includes:

[0026] A second phase shifter, used for shifting the phase of the second local oscillator signal;

[0027] The second amplifier is used to amplify the gain of the second local oscillator signal after the phase shift.

[0028] In a third aspect, an embodiment of the present invention provides a radio frequency transceiver system, comprising the transmitter system and the receiver system as described in the first aspect and the second aspect, wherein the transmitter system is communicatively connected to the receiver system.

[0029] In a fourth aspect, an embodiment of the present invention provides an interference signal suppression method, which is applied to the transmitter system described in the first aspect, and is characterized by comprising:

[0030] Acquire a local oscillator signal, and divide the local oscillator signal into a first local oscillator signal and a second local oscillator signal;

[0031] Acquire an intermediate frequency input signal, and divide the intermediate frequency input signal into an intermediate frequency I+ signal and an intermediate frequency Q+ signal;

[0032] dividing the first local oscillator signal into a local oscillator I+ signal and a local oscillator Q- signal;

[0033] Mixing the intermediate frequency I+ signal and the local oscillator I+ signal to obtain a first mixed signal;

[0034] Mixing the intermediate frequency Q+ signal and the local oscillator Q- signal to obtain a second mixed signal;

[0035] synthesizing the first mixing signal and the second mixing signal to obtain a first signal to be coupled;

[0036] Phase shifting and amplifying the second local oscillator signal to obtain a second signal to be coupled;

[0037] The first signal to be coupled and the second signal to be coupled are coupled to output a radio frequency signal.

[0038] In some embodiments of the present invention, the step of phase shifting and amplifying the second local oscillator signal to obtain a second signal to be coupled includes:

[0039] The first phase shifter performs phase shifting on the second local oscillator signal;

[0040] The first amplifier amplifies the second local oscillator signal after the phase shift to obtain a second signal to be coupled.

[0041] In a fifth aspect, an embodiment of the present invention provides an interference signal suppression method, which is applied to the receiver system according to the second aspect, and is characterized by comprising:

[0042] dividing the local oscillator signal into a first local oscillator signal and a second local oscillator signal;

[0043] The RF input signal is divided into a RF I+ signal and a RF Q+ signal;

[0044] Splitting the first local oscillator signal into a local oscillator I+ signal and a local oscillator Q+ signal;

[0045] Mixing the radio frequency I+ signal and the local oscillator I+ signal to obtain a third mixed signal;

[0046] Mixing the radio frequency Q+ signal and the local oscillator Q+ signal to obtain a fourth mixed signal;

[0047] synthesizing the third mixing signal and the fourth mixing signal to obtain a third signal to be coupled;

[0048] performing phase shifting and amplification on the second local oscillator signal to obtain a fourth signal to be coupled;

[0049] The third signal to be coupled and the fourth signal to be coupled are coupled to output an intermediate frequency signal.

[0050] In some embodiments of the present invention, the phase shifting and amplifying the second local oscillator signal to obtain a fourth signal to be coupled includes:

[0051] The second phase shifter performs phase shifting on the second local oscillator signal;

[0052] The second amplifier amplifies the second local oscillator signal after the phase shift to obtain a fourth signal to be coupled.

[0053] In a sixth aspect, an embodiment of the present invention provides an interference signal suppression method, which is applied to the radio frequency transceiver system of the third aspect.

[0054] The system is characterized by comprising:

[0055] Executing the interference signal suppression method according to the fourth aspect through the transmitter system;

[0056] The interference signal suppression method as described in the fifth aspect is performed by the receiver system.

[0057] The transmitter system according to the embodiment of the present invention has at least the following beneficial effects:

[0058] According to the technical solution of this embodiment, by performing IQ mixing image suppression and local oscillator leakage suppression at the RF transceiver front end, the transmitter RF band filter group, the receiver RF band filter group and the intermediate frequency band local oscillator leakage suppressor are used to meet broadband applications without using filters, reduce design complexity and improve the performance of the RF transceiver system. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 is a schematic diagram of the overall structure of a transmitter system provided by an embodiment of the present invention;

[0060] Figure 2 is a schematic diagram of the overall structure of a receiver system provided by an embodiment of the present invention;

[0061] Figure 3 is a flow chart of interference signal suppression performed by a transmitter system provided by an embodiment of the present invention;

[0062] Figure 4 A flowchart of performing phase shifting and amplification on a second local oscillator signal to obtain a second signal to be coupled is provided by an embodiment of the present invention;

[0063] Figure 5 is a flow chart of interference signal suppression performed by a receiver system provided by an embodiment of the present invention;

[0064] Figure 6 It is a flow chart of performing phase shifting and amplification on a second local oscillator signal to obtain a fourth signal to be coupled, provided by an embodiment of the present invention.

[0065] Reference numerals:

[0066] The first power divider 1, the first bridge 2, the first filter 3, the first mixer 4, the second mixer 5, the second power divider 6, the first phase-shift amplifier module 7, the first phase shifter 71, the first amplifier 72, the first coupler 8, the third power divider 10, the second bridge 20, the second filter 30, the third mixer 40, the fourth mixer 50, the fourth power divider 60, the second phase-shift amplifier module 70, the second coupler 80, the second phase shifter 701, the second amplifier 702, the local oscillator signal LO, the first local oscillator signal LO1, the second local oscillator signal L02, the intermediate frequency signal IF, and the radio frequency signal RF. DETAILED DESCRIPTION

[0067] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0068] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0069] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0070] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0071] First, refer to Figure 1 The embodiment of the present invention provides a transmitter system, including a first power divider 1, used for dividing a local oscillator signal L0 into a first local oscillator signal L01 and a second local oscillator signal L02; a first bridge 2, used for dividing an intermediate frequency input signal into an intermediate frequency I+ signal and an intermediate frequency Q+ signal; a first filter 3, used for dividing the first local oscillator signal L01 into a local oscillator I+ signal and a local oscillator Q- signal; a first mixer 4, used for mixing the intermediate frequency I+ signal and the local oscillator I+ signal to obtain a first mixed signal; a second mixer 5, used for mixing the intermediate frequency Q+ signal and the local oscillator Q- signal to obtain a second mixed signal; a second power divider 6, used for synthesizing the first mixed signal and the second mixed signal to obtain a first signal to be coupled; a first phase-shifting amplifier module 7, used for phase-shifting and amplifying the second local oscillator signal L02 to obtain a second signal to be coupled; a first coupler 8, used for coupling the first signal to be coupled and the second signal to be coupled, and the output port of the first coupler 8 outputs a radio frequency signal RF.

[0072] It should be noted that, for the transmitter system, the intermediate frequency input signal is divided into intermediate frequency I+ and intermediate frequency Q+ signals through the first bridge 2, the input local oscillator signal L0 is divided into a first local oscillator signal L01 and a second local oscillator signal L02 through the first power divider 1, the first local oscillator signal L01 is divided into a local oscillator I+ signal and a Q- signal through the first filter 3, the intermediate frequency I+ signal and the local oscillator I+ signal are mixed by the first mixer 4 to obtain a first mixed signal, and the intermediate frequency Q+ signal and the local oscillator Q- signal are mixed by the second mixer 5 to obtain a second mixed signal. The first mixing signal and the second mixing signal are input into the second power divider 6 for synthesis to obtain the first signal to be coupled, the first signal to be coupled is input into the first input end of the first coupler 8, the second local oscillator signal L02 is phase-shifted and amplified by the first phase-shift amplifier module 7 to obtain the second signal to be coupled, the second signal to be coupled is input into the second input end of the first coupler 8, the first coupler 8 couples the first signal to be coupled and the second signal to be coupled, and outputs the radio frequency signal RF. Specifically, the first mixer 4 and the second mixer 5 can obtain new signals of the sum and difference of two different frequencies by multiplying two signals of different frequencies.

[0073] Furthermore, the transmitter system realizes image suppression through the first mixer 4 and the second mixer 5, and realizes suppression of the local oscillator signal L0 by inputting the second local oscillator signal L02 into the first coupler 8 for cancellation. By changing the frequency of the local oscillator signal L0, the transmitter system can realize broadband RF signal RF output without adding a filter group on the RF signal RF output side. In addition, for the transmitter system, broadband RF signal RF output can be realized by adjusting the frequency range of the local oscillator signal L0, without worrying about the RF signal RF being within the frequency band of the local oscillator signal L0, and meeting the broadband circuit application.

[0074] It can be understood by those skilled in the art that, for image suppression, the transmitter system adopts an orthogonal mixer structure to achieve it, and the intermediate frequency I+ signal output by the first bridge 2 and the local oscillator I+ signal output by the first filter 3 are mixed by the first mixer 4, and the intermediate frequency Q+ signal output by the first bridge 2 and the local oscillator Q- signal output by the first filter 3 are mixed by the second mixer 5, so that the first mixer 4 and the second mixer 5 respectively calculate the orthogonal component and the conjugate component of the intermediate frequency signal IF and the local oscillator signal L0, thereby effectively suppressing the mixing image suppression of the transmitter system. In addition, the two new signals I and Q are obtained under the action of the first power divider 1. The new signals of the frequency sum and the frequency difference are canceled to achieve image suppression.

[0075] The first phase-shift amplification module 7 includes: a first phase shifter 71 for performing phase shift on the second local oscillation signal L02; and a first amplifier 72 for performing gain amplification on the second local oscillation signal L02 after the phase shift.

[0076] It should be noted that, in the process of suppressing the local oscillator signal L0, the local oscillator signal L0 enters the second input end of the first coupler 8 through the first phase shifter 71 and the first amplifier 72, and the phase of the local oscillator signal L0 is adjusted by the first phase shifter 71, so that there is a phase difference between the local oscillator signal L0 and the image frequency after being processed by the first phase shifter 71, so that the local oscillator signal L0 and the image frequency are initially reduced. When the local oscillator signal L0 is amplified by the first amplifier 72, the amplitude of the local oscillator signal L0 is increased, so that the first coupler 8 generates an interference effect with the image frequency after receiving the local oscillator signal L0, thereby realizing the suppression of the local oscillator signal L0. The suppression of the local oscillator signal is achieved by adjusting the first phase shifter 71 and the first amplifier 72 to cancel the local oscillator signal L0 leaked from the first power divider 1 side with equal amplitude and inverse phase when the signal enters the coupler.

[0077] Optionally, the first amplifier 72 is a variable gain amplifier, and the first filter 3 is a passive multi-phase filter.

[0078] Second, refer to Figure 2The embodiment of the present invention provides a receiver system, including a third power divider 10, used for dividing a local oscillator signal L0 into a first local oscillator signal L01 and a second local oscillator signal L02; a second bridge 20, used for dividing a radio frequency input signal RF into a radio frequency I+ signal and a radio frequency Q+ signal; a second filter 30, used for dividing the first local oscillator signal L01 into a local oscillator I+ signal and a local oscillator Q+ signal; a third mixer 40, used for mixing the radio frequency I+ signal and the local oscillator I+ signal to obtain a third mixed signal; a fourth mixer 50, used for mixing the radio frequency Q+ signal and the local oscillator Q+ signal to obtain a fourth mixed signal; a fourth power divider 60, used for synthesizing the third mixed signal and the fourth mixed signal to obtain a third signal to be coupled; a second phase-shift amplifier module 70, used for phase-shifting and amplifying the second local oscillator signal L02 to obtain a fourth signal to be coupled; a second coupler 80, used for coupling the third signal to be coupled and the fourth signal to be coupled to output an intermediate frequency signal IF.

[0079] It should be noted that, for the receiver system, the radio frequency input signal RF is divided into a radio frequency I+ signal and a radio frequency Q+ signal through the second bridge 20, the local oscillator signal L0 is divided into a first local oscillator signal L01 and a second local oscillator signal L02 through the third power divider 10, the first local oscillator signal L01 is divided into a local oscillator I+ signal and a local oscillator Q+ signal through the second filter 30, the radio frequency I+ signal and the local oscillator I+ signal are mixed by the third mixer 40 to obtain a third mixed signal, and the radio frequency Q+ signal and the local oscillator Q+ signal are mixed by the fourth mixer 50 to obtain a fourth The third mixed signal and the third mixed signal are input to the fourth power divider 60 for synthesis to obtain the third signal to be coupled, the third signal to be coupled is input to the first input end of the second coupler 80, the second local oscillator signal L02 is phase-shifted and amplified by the second phase-shift amplifier module 70 to obtain the fourth signal to be coupled, the fourth signal to be coupled is input to the second input end of the second coupler 80, the second coupler 80 couples the third signal to be coupled and the fourth signal to be coupled, and the output port of the second coupler 80 outputs the intermediate frequency signal IF. In addition, for the receiver system, the broadband intermediate frequency signal IF output can be achieved by adjusting the frequency range of the local oscillator signal L0, without worrying that the local oscillator signal L0 is within the intermediate frequency signal IF band, which can meet the broadband circuit application.

[0080] The second phase-shift amplification module 70 comprises a second phase shifter 701 for performing phase shift on the second local oscillation signal L02 ; and a second amplifier 702 for performing gain amplification on the second local oscillation signal L02 after the phase shift.

[0081] Optionally, the second amplifier 702 is a variable gain amplifier, and the second filter 30 is a passive multi-phase filter.

[0082] It should be noted that, in the process of suppressing the local oscillator signal L0, the local oscillator signal L0 enters the second input end of the coupler through the second phase shifter 701 and the second amplifier 702, and the phase of the local oscillator signal L0 is adjusted by the second phase shifter 701, so that there is a phase difference between the local oscillator signal L0 and the image frequency after being processed by the second phase shifter 701, so that the local oscillator signal L0 and the image frequency are initially reduced. When the local oscillator signal L0 is amplified by the second amplifier 702, the amplitude of the local oscillator signal L0 is increased, so that the second coupler 80 generates an interference effect with the image frequency after receiving the local oscillator signal L0, thereby realizing the suppression of the local oscillator signal L0.

[0083] In a third aspect, this embodiment provides a radio frequency transceiver system, comprising the transmitter system of the first aspect and the receiver system of the second aspect, wherein the transmitter system is communicatively connected to the receiver system.

[0084] It should be noted that in the RF transceiver system, the first filter 3 of the transmitter system and the second filter 30 of the receiver system can both realize four output signals of I+, I-, Q+, and Q-. When the RF transceiver system needs to transmit the RF signal RF, the transmitter system receives the local oscillator signal L0 and the intermediate frequency signal IF, uses the I+ and Q- signals, and the I- and Q+ signals to match the load, and finally outputs the RF signal RF through the first coupler 8; the receiver system receives the RF signal RF and the local oscillator signal L0 output by the transmitter system, and uses the I+ and Q+, I- and Q- signals to match the load, thereby realizing that the RF transceiver system does not use filters to meet broadband applications, thereby reducing the design complexity and cost of the RF transceiver system.

[0085] Fourthly, refer to Figure 3 , Figure 3 A flowchart of an interference signal suppression method provided by an embodiment of the present invention, the interference signal suppression method includes but is not limited to the following steps:

[0086] Step S11, obtaining a local oscillator signal L0, and dividing the local oscillator signal L0 into a first local oscillator signal L01 and a second local oscillator signal L02;

[0087] Step S12, obtaining an intermediate frequency input signal, and dividing the intermediate frequency input signal into an intermediate frequency I+ signal and an intermediate frequency Q+ signal;

[0088] Step S13, dividing the first local oscillator signal L01 into a local oscillator I+ signal and a local oscillator Q- signal;

[0089] Step S14, mixing the intermediate frequency I+ signal and the local oscillator I+ signal to obtain a first mixed signal;

[0090] Step S15, mixing the intermediate frequency Q+ signal and the local oscillator Q- signal to obtain a second mixed signal;

[0091] Step S16, synthesizing the first mixing signal and the second mixing signal to obtain a first signal to be coupled;

[0092] Step S17, performing phase shifting and amplification on the second local oscillation signal L02 to obtain a second signal to be coupled;

[0093] Step S18: couple the first signal to be coupled and the second signal to be coupled, and output a radio frequency signal RF.

[0094] It should be noted that the intermediate frequency input signal is divided into intermediate frequency I+ and intermediate frequency Q+ signals through the first bridge 2, the input local oscillator signal L0 is divided into a first local oscillator signal L01 and a second local oscillator signal L02 through the first power divider 1, the first local oscillator signal L01 is divided into a local oscillator I+ signal and a Q- signal through the first filter 3, the intermediate frequency I+ signal and the local oscillator I+ signal are mixed by the first mixer 4 to obtain a first mixed signal, and the intermediate frequency Q+ signal and the local oscillator Q- signal are mixed by the second mixer 5 to obtain a second mixed signal. The first mixed signal and the second mixed signal are jointly fed into the second power divider 6 for synthesis to obtain a first signal to be coupled, the first signal to be coupled is input to the first input end of the first coupler 8, the second local oscillator signal L02 is phase-shifted and amplified by the first phase-shift amplifier module 7 to obtain a second signal to be coupled, the second signal to be coupled is input to the second input end of the first coupler 8, the first coupler 8 couples the first signal to be coupled with the second signal to be coupled, and outputs a radio frequency signal RF.

[0095] In addition, in one embodiment, referring to Figure 4 ,exist Figure 3 Step S17 of the illustrated embodiment also includes but is not limited to the following steps:

[0096] Step S21, the first phase shifter 71 performs phase shift on the second local oscillation signal L02;

[0097] In step S22 , the first amplifier 72 amplifies the second local oscillation signal L02 after the phase shift to obtain a second signal to be coupled.

[0098] It should be noted that, in the process of suppressing the local oscillator signal L0, the local oscillator signal L0 enters the second input end of the coupler through the first phase shifter 71 and the first amplifier 72, and the phase of the local oscillator signal L0 is adjusted by the first phase shifter 71, so that there is a phase difference between the local oscillator signal L0 and the image frequency after being processed by the first phase shifter 71, so that the local oscillator signal L0 and the image frequency are initially reduced. When the local oscillator signal L0 is amplified by the first amplifier 72, the amplitude of the local oscillator signal L0 is increased, so that the first coupler 8 generates an interference effect with the image frequency after receiving the local oscillator signal, thereby realizing the suppression of the local oscillator signal L0.

[0099] Fifth, refer to Figure 5 , Figure 5 A flowchart of an interference signal suppression method provided by an embodiment of the present invention, the interference signal suppression method includes but is not limited to the following steps:

[0100] Step S31, dividing the local oscillation signal L0 into a first local oscillation signal L01 and a second local oscillation signal L02;

[0101] Step S32, dividing the radio frequency input signal RF into a radio frequency I+ signal and a radio frequency Q+ signal;

[0102] Step S33, dividing the first local oscillator signal L01 into a local oscillator I+ signal and a local oscillator Q+ signal;

[0103] Step S34, mixing the radio frequency I+ signal and the local oscillator I+ signal to obtain a third mixed signal;

[0104] Step S35, mixing the radio frequency Q+ signal and the local oscillator Q+ signal to obtain a fourth mixed signal;

[0105] Step S36, synthesizing the third mixing signal and the fourth mixing signal to obtain a third signal to be coupled;

[0106] Step S37, performing phase shifting and amplification on the second local oscillation signal L02 to obtain a fourth signal to be coupled;

[0107] Step S38, coupling the third signal to be coupled and the fourth signal to be coupled, and outputting an intermediate frequency signal IF.

[0108] It should be noted that, for the receiver system, the radio frequency input signal RF is divided into a radio frequency I+ signal and a radio frequency Q+ signal through the second bridge 20, the local oscillator signal L0 is divided into a first local oscillator signal L01 and a second local oscillator signal L02 through the third power divider 10, the first local oscillator signal L01 is divided into a local oscillator I+ signal and a local oscillator Q+ signal through the second filter 30, the radio frequency I+ signal and the local oscillator I+ signal are mixed by the third mixer 40 to obtain a third mixed signal, and the radio frequency Q+ signal and the local oscillator Q+ signal are mixed by the fourth mixer 50 to obtain a fourth The third mixing signal and the third mixing signal are input into the fourth power divider 60 for synthesis to obtain a third signal to be coupled, the third signal to be coupled is input into the first input end of the second coupler 80, the second local oscillator signal L02 is phase-shifted and amplified by the second phase-shift amplifier module 70 to obtain a fourth signal to be coupled, the fourth signal to be coupled is input into the second input end of the second coupler 80, the second coupler 80 couples the third signal to be coupled and the fourth signal to be coupled, and the output port of the second coupler 80 outputs the intermediate frequency signal IF.

[0109] In addition, in one embodiment, referring to Figure 6 ,exist Figure 5 Step S37 of the illustrated embodiment also includes but is not limited to the following steps:

[0110] Step S41, the second phase shifter 701 performs phase shift on the second local oscillation signal L02;

[0111] In step S42, the second amplifier 702 amplifies the phase-shifted second local oscillator signal L02 to obtain a fourth signal to be coupled.

[0112] It should be noted that, in the process of suppressing the local oscillator signal L0, the local oscillator signal L0 enters the second input end of the coupler through the second phase shifter 701 and the second amplifier 702, and the phase of the local oscillator signal is adjusted by the second phase shifter 701, so that there is a phase difference between the local oscillator signal L0 and the image frequency after being processed by the second phase shifter 701, so that the local oscillator signal L0 and the image frequency are initially reduced. When the local oscillator signal L0 is amplified by the second amplifier 702, the amplitude of the local oscillator signal L0 is increased, so that the second coupler 80 generates an interference effect with the image frequency after receiving the local oscillator signal L0, thereby realizing the suppression of the local oscillator signal L0.

[0113] In the sixth aspect, an embodiment of the present invention also provides an interference signal suppression method, which is applied to the radio frequency transceiver system of the third aspect above, specifically including executing the interference signal suppression method as described in the fourth aspect through a transmitter system; and, executing the interference signal suppression method as described in the fifth aspect through a receiver system.

[0114] It should be noted that, in the RF transceiver system, the first filter 3 of the transmitter system and the second filter 30 of the receiver system can both realize four output signals of I+, I-, Q+, and Q-. When the RF transceiver system needs to transmit the RF signal RF, the transmitter system receives the local oscillator signal L0 and the intermediate frequency signal IF, uses the I+ and Q- signals, and the I- and Q+ signals are connected to the load for matching, and finally outputs the RF signal RF through the first coupler 8; the receiver system receives the RF signal RF and the local oscillator signal L0 output by the transmitter system, uses the I+ and Q+, and the I- and Q- signals to connect the matching load, thereby realizing that the RF transceiver system does not use filters to meet broadband applications, thereby reducing the design complexity and cost of the RF transceiver system.

[0115] The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the above-mentioned implementation mode. Technical personnel familiar with the field can also make various equivalent deformations or substitutions under the shared conditions without violating the spirit of the present invention. These equivalent deformations or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. A transmitter system, characterized in that: include: A first power divider, used for dividing the local oscillator signal into a first local oscillator signal and a second local oscillator signal; A first bridge, used for dividing an intermediate frequency input signal into an intermediate frequency I+ signal and an intermediate frequency Q+ signal; A first filter, used for dividing the first local oscillator signal into a local oscillator I+ signal and a local oscillator Q- signal; A first mixer, used for mixing the intermediate frequency I+ signal and the local oscillator I+ signal to obtain a first mixed signal; A second mixer, used for mixing the intermediate frequency Q+ signal and the local oscillator Q- signal to obtain a second mixed signal; A second power divider, used for synthesizing the first mixing signal and the second mixing signal to obtain a first signal to be coupled; A first phase-shifting and amplifying module, used for performing phase shifting and amplifying on the second local oscillator signal to obtain a second signal to be coupled; The first coupler is used to couple the first signal to be coupled and the second signal to be coupled to output a radio frequency signal.

2. The transmitter system according to claim 1, characterized in that The first phase-shifting amplification module comprises: A first phase shifter, configured to shift the phase of the second local oscillator signal; The first amplifier is used to amplify the gain of the second local oscillator signal after the phase shift.

3. A receiver system, characterized in that: include: A third power divider, used for dividing the local oscillator signal into a first local oscillator signal and a second local oscillator signal; A second bridge, used for dividing the RF input signal into a RF I+ signal and a RF Q+ signal; A second filter, used for dividing the first local oscillator signal into a local oscillator I+ signal and a local oscillator Q+ signal; A third mixer, used for mixing the radio frequency I+ signal and the local oscillator I+ signal to obtain a third mixed signal; a fourth mixer, configured to mix the radio frequency Q+ signal and the local oscillator Q+ signal to obtain a fourth mixed signal; a fourth power divider, configured to synthesize the third mixing signal and the fourth mixing signal to obtain a third signal to be coupled; A second phase-shifting and amplifying module, used for performing phase shifting and amplifying on the second local oscillator signal to obtain a fourth signal to be coupled; The second coupler is used to couple the third signal to be coupled and the fourth signal to be coupled, and output an intermediate frequency signal.

4. The receiver system according to claim 3, characterized in that The second phase-shift amplification module comprises: A second phase shifter, used for shifting the phase of the second local oscillator signal; The second amplifier is used to amplify the gain of the second local oscillator signal after the phase shift.

5. A radio frequency transceiver system, characterized in that: Comprising the transmitter system as claimed in claim 1 or 2, and the receiver system as claimed in claim 3 or 4: The transmitter system is communicatively connected to the receiver system.

6. A method for suppressing interference signals, applied to the transmitter system according to claim 1 or 2, characterized in that: include: Acquire a local oscillator signal, and divide the local oscillator signal into a first local oscillator signal and a second local oscillator signal; Acquire an intermediate frequency input signal, and divide the intermediate frequency input signal into an intermediate frequency I+ signal and an intermediate frequency Q+ signal; dividing the first local oscillator signal into a local oscillator I+ signal and a local oscillator Q- signal; Mixing the intermediate frequency I+ signal and the local oscillator I+ signal to obtain a first mixed signal; Mixing the intermediate frequency Q+ signal and the local oscillator Q- signal to obtain a second mixed signal; synthesizing the first mixing signal and the second mixing signal to obtain a first signal to be coupled; Phase shifting and amplifying the second local oscillator signal to obtain a second signal to be coupled; The first signal to be coupled and the second signal to be coupled are coupled to output a radio frequency signal.

7. The interference signal suppression method according to claim 6, characterized in that: The phase shifting and amplifying the second local oscillator signal to obtain a second signal to be coupled includes: The first phase shifter performs phase shifting on the second local oscillator signal; The first amplifier amplifies the second local oscillator signal after the phase shift to obtain a second signal to be coupled.

8. An interference signal suppression method, applied to the receiver system according to claim 3 or 4, characterized in that: include: dividing the local oscillator signal into a first local oscillator signal and a second local oscillator signal; The RF input signal is divided into a RF I+ signal and a RF Q+ signal; Splitting the first local oscillator signal into a local oscillator I+ signal and a local oscillator Q+ signal; Mixing the radio frequency I+ signal and the local oscillator I+ signal to obtain a third mixed signal; Mixing the radio frequency Q+ signal and the local oscillator Q+ signal to obtain a fourth mixed signal; synthesizing the third mixing signal and the fourth mixing signal to obtain a third signal to be coupled; performing phase shifting and amplification on the second local oscillator signal to obtain a fourth signal to be coupled; The third signal to be coupled and the fourth signal to be coupled are coupled to output an intermediate frequency signal.

9. The interference signal suppression method according to claim 8, characterized in that: The phase shifting and amplifying the second local oscillator signal to obtain a fourth signal to be coupled includes: The second phase shifter performs phase shifting on the second local oscillator signal; The second amplifier amplifies the second local oscillator signal after the phase shift to obtain a fourth signal to be coupled.

10. An interference signal suppression method, applied to the radio frequency transceiver system according to claim 5, characterized in that: include: Executing the interference signal suppression method according to claims 6 to 7 by the transmitter system; The interference signal suppression method according to claims 8 to 9 is performed by the receiver system.

Images