CN210780780U - Balanced radio frequency front end receiving and transmitting circuit and system - Google Patents
Balanced radio frequency front end receiving and transmitting circuit and system Download PDFInfo
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- CN210780780U CN210780780U CN202020383101.2U CN202020383101U CN210780780U CN 210780780 U CN210780780 U CN 210780780U CN 202020383101 U CN202020383101 U CN 202020383101U CN 210780780 U CN210780780 U CN 210780780U
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Abstract
The embodiment of the utility model discloses balanced type radio frequency front end transceiver circuitry and system belongs to microwave radio frequency technical field. The input end of a signal transmitting circuit and the output end of a signal receiving circuit in the circuit are connected with a first coupler, and the output end of the signal transmitting circuit and the input end of the signal receiving circuit are connected with a second coupler; or the input end of the signal transmitting circuit and the output end of the signal receiving circuit are connected with the third coupler, the output end of the signal transmitting circuit is connected with the fourth coupler, and the input end of the signal receiving circuit is connected with the fifth coupler; or the input end of the signal transmitting circuit is connected with the sixth coupler, the output end of the signal receiving circuit is connected with the seventh coupler, and the output end of the signal transmitting circuit and the input end of the signal receiving circuit are connected with the eighth coupler. The embodiment of the utility model provides a can be under the prerequisite that does not reduce the transceiving performance, simplify the circuit complexity, reduce circuit area occupation and realization cost.
Description
Technical Field
The embodiment of the utility model provides a relate to microwave radio frequency technical field, in particular to balanced type radio frequency front end transceiver circuitry and system.
Background
The rapid development of phased array assemblies has placed increasing demands on the miniaturization of transceiver assemblies. The integration of rf front-end transceiver circuitry in transceiver components is one of the most challenging designs. Generally, the rf front-end transceiver circuit not only requires performance indexes such as a wide band, low insertion loss, and high isolation, but also requires a small size to achieve high integration.
The existing radio frequency front end receiving and transmitting circuit adopting a balanced structure mainly comprises a balanced power amplifier, a limiter, a low noise amplifier, a switching network and a coupler, and the circuit structure of the circuit is shown in fig. 1. Wherein, the signal emission circuit is: the radio frequency signal is converted into two signals through the coupler1 through the radio frequency port 1, the two signals are respectively amplified by two Power amplifiers (Power amplifiers) PA1 and PA2 and then output to two ends of the coupler2, the two signals are combined into a single signal through the coupler2, and the single signal is connected to an antenna end through a switching network and radiated. The signal receiving circuit is: the signal received from the antenna end is converted into two signals through the coupler3 by the switching network, the two signals are respectively output to two ends of the coupler4 through a two-way limiter and a Low Noise Amplifier (Low Noise Amplifier) LNA1 and LNA2, and are combined into a single signal through the coupler4 and then are output to the radio frequency port 2. Wherein, the isolation port of coupler1 is connected with the load network 1, the isolation port of coupler2 is connected with the load network 2, the isolation port of coupler3 is connected with the load network 3, and the isolation port of coupler4 is connected with the load network 4.
In the existing balanced radio frequency front end receiving and transmitting circuit, a signal transmitting circuit and a signal receiving circuit both use two couplers, so that the design complexity is increased, the occupied area of the circuit is also increased, and the cost of a phased array component is also sharply increased along with the increase of the array scale.
Disclosure of Invention
The embodiment of the utility model provides a balanced type radio frequency front end receiving and sending out circuit and system for the design of solving current balanced type radio frequency front end receiving and sending out circuit is complicated, and circuit area occupied is big, problem with high costs. The technical scheme is as follows:
in a first aspect, a balanced radio frequency front end transceiver circuit is provided, where the balanced radio frequency front end transceiver circuit includes: the system comprises a coupler, a switching network, a load network, a balanced signal transmitting circuit, a balanced signal receiving circuit and an antenna;
the coupler comprising a first coupler and a second coupler, the switching network comprising a first switching network and a second switching network, the load network comprises a first load network and a second load network, the input end of the balanced signal transmitting circuit and the output end of the balanced signal receiving circuit are connected with the first coupler through the first switching network, the isolation port of the first coupler is connected with the first load network, the output end of the balanced signal transmitting circuit and the input end of the balanced signal receiving circuit are connected with the second coupler through the second switching network, the isolation port of the second coupler is connected with the second load network, the input and output ends of the second coupler are connected with the antenna, the input and output end of the first coupler is the radio frequency input and output end of the balanced radio frequency front end receiving and transmitting circuit; alternatively, the first and second electrodes may be,
the coupler comprises a third coupler, a fourth coupler and a fifth coupler, the switching network comprises a third switching network and a fourth switching network, the load network comprises a third load network, a fourth load network and a fifth load network, the input end of the balanced signal transmitting circuit and the output end of the balanced signal receiving circuit are connected with the third coupler through the third switching network, the isolation port of the third coupler is connected with the third load network, the output end of the balanced signal transmitting circuit is connected with the fourth coupler, the isolation port of the fourth coupler is connected with the fourth load network, the input end of the balanced signal receiving circuit is connected with the fifth coupler, the isolation port of the fifth coupler is connected with the fifth load network, and the output end of the fourth coupler and the input end of the fifth coupler are connected with the fourth switching network through the fourth switching network The input and output ends of the third coupler are the radio frequency input and output ends of the balanced radio frequency front end receiving and transmitting circuit; alternatively, the first and second electrodes may be,
the coupler comprises a sixth coupler, a seventh coupler and an eighth coupler, the switching network comprises a fifth switching network, the load network comprises a sixth load network, a seventh load network and an eighth load network, the input end of the balanced signal transmitting circuit is connected with the sixth coupler, the isolation port of the sixth coupler is connected with the sixth load network, the output end of the balanced signal receiving circuit is connected with the seventh coupler, the isolation port of the seventh coupler is connected with the seventh load network, the output end of the balanced signal transmitting circuit and the input end of the balanced signal receiving circuit are connected with the eighth coupler through the fifth switching network, the isolation port of the eighth coupler is connected with the eighth load network, and the input and output ends of the eighth coupler are connected with the antenna, the input end of the sixth coupler is the radio frequency input end of the balanced radio frequency front end receiving and transmitting circuit, and the output end of the seventh coupler is the radio frequency output end of the balanced radio frequency front end receiving and transmitting circuit.
In an alternative embodiment, the balanced signal transmitting circuit comprises a first signal transmitting circuit and a second signal transmitting circuit; the first signal transmitting circuit comprises a first power amplifier, and the second signal transmitting circuit comprises a second power amplifier; the input ends of the first power amplifier and the second power amplifier are the input ends of the balanced signal transmitting circuit, and the output ends of the first power amplifier and the second power amplifier are the output ends of the balanced signal transmitting circuit;
the balanced signal receiving circuit comprises a first signal receiving circuit and a second signal receiving circuit; the first signal receiving circuit comprises a first amplitude limiter and a first low noise amplifier which are connected in series, and the second signal receiving circuit comprises a second amplitude limiter and a second low noise amplifier which are connected in series; the input ends of the first amplitude limiter and the second amplitude limiter are the input ends of the balanced signal receiving circuit, and the output ends of the first low-noise amplifier and the second low-noise amplifier are the output ends of the balanced signal receiving circuit.
In an alternative embodiment, the coupler comprises a first coupler and a second coupler, the switching network comprises a first switching network and a second switching network, and the load network comprises a first load network and a second load network, then the first switching network comprises a first switching element and a second switching element, the second switching network comprises a third switching element and a fourth switching element;
a through port of the first coupler is connected with a common port of the first switching element, and two radio frequency ports of the first switching element are respectively connected with an output end of the first low noise amplifier and an input end of the first power amplifier; a coupling port of the first coupler is connected with a common port of the second switching element, and two radio frequency ports of the second switching element are respectively connected with an output end of the second low noise amplifier and an input end of the second power amplifier;
a coupling port of the second coupler is connected with a common port of the third switching element, and two radio frequency ports of the third switching element are respectively connected with an input end of the first amplitude limiter and an output end of the first power amplifier; and a through port of the second coupler is connected with a common port of the fourth switching element, and two radio frequency ports of the fourth switching element are respectively connected with an input end of the second amplitude limiter and an output end of the second power amplifier.
In an alternative embodiment, the coupler comprises a third coupler, a fourth coupler and a fifth coupler, the switching network comprises a third switching network and a fourth switching network, and the load network comprises a third load network, a fourth load network and a fifth load network, then the third switching network comprises a fifth switching element and a sixth switching element, and the fourth switching network comprises a seventh switching element;
a coupling port of the third coupler is connected with a common port of the fifth switching element, and two radio frequency ports of the fifth switching element are respectively connected with an output end of the first low noise amplifier and an input end of the first power amplifier; a through port of the third coupler is connected with a common port of the sixth switching element, and two radio frequency ports of the sixth switching element are respectively connected with an output end of the second low noise amplifier and an input end of the second power amplifier;
an output end of the first power amplifier is connected with a through port of the fourth coupler, an output end of the second power amplifier is connected with a coupling port of the fourth coupler, and an output end of the fourth coupler is connected with one radio frequency port of the seventh switching element;
the input end of the first amplitude limiter is connected with the coupling port of the fifth coupler, the input end of the second amplitude limiter is connected with the through port of the fifth coupler, and the input end of the fifth coupler is connected with the other radio frequency port of the seventh switching element;
the common port of the seventh switching element is connected to the antenna.
In an alternative embodiment, the coupler comprises a sixth coupler, a seventh coupler and an eighth coupler, the switching network comprises a fifth switching network, and the load network comprises a sixth load network, a seventh load network and an eighth load network, then the fifth switching network comprises an eighth switching element and a ninth switching element;
a through port of the sixth coupler is connected with the input end of the first power amplifier, and a coupling port of the sixth coupler is connected with the input end of the second power amplifier;
a through port of the seventh coupler is connected with the output end of the first low noise amplifier, and a coupling port of the seventh coupler is connected with the output end of the second low noise amplifier;
a through port of the eighth coupler is connected to a common port of the eighth switching element, and two rf ports of the eighth switching element are respectively connected to an input terminal of the first limiter and an output terminal of the second power amplifier; and a coupling port of the eighth coupler is connected with a common port of the ninth switching element, and two radio frequency ports of the ninth switching element are respectively connected with an input end of the second amplitude limiter and an output end of the first power amplifier.
In an alternative embodiment, each load network is comprised of at least one of a resistor, an inductor, and a capacitor.
In a second aspect, a radar system is provided, the radar system comprising a balanced radio frequency front end transceiver circuit according to the first aspect.
In a third aspect, a communication system is provided, where the communication system includes the balanced radio frequency front end transceiver circuit according to the first aspect.
The embodiment of the utility model provides a technical scheme's beneficial effect includes at least:
because the input end of the balanced signal transmitting circuit and the output end of the balanced signal receiving circuit in the balanced radio frequency front end receiving and transmitting circuit are connected with the first coupler, and the output end of the balanced signal transmitting circuit and the input end of the balanced signal receiving circuit are connected with the second coupler, the balanced radio frequency front end receiving and transmitting circuit comprises the two couplers, the circuit complexity can be simplified, the circuit occupation area is reduced, and the realization cost is reduced on the premise of not reducing the receiving and transmitting performance.
Because the input end of the balanced signal transmitting circuit and the output end of the balanced signal receiving circuit in the balanced radio frequency front end receiving and transmitting circuit are connected with the third coupler, the output end of the balanced signal transmitting circuit is connected with the fourth coupler, and the input end of the balanced signal receiving circuit is connected with the fifth coupler, the balanced radio frequency front end receiving and transmitting circuit comprises the three couplers, the circuit complexity can be simplified, the circuit occupation area is reduced, and the realization cost is reduced on the premise that the receiving and transmitting performance is not reduced.
Because the input end of the balanced signal transmitting circuit in the balanced radio frequency front-end receiving and transmitting circuit is connected with the sixth coupler, the output end of the balanced signal receiving circuit is connected with the seventh coupler, and the output end of the balanced signal transmitting circuit and the input end of the balanced signal receiving circuit are connected with the eighth coupler, the balanced radio frequency front-end receiving and transmitting circuit comprises three couplers, the circuit complexity can be simplified, the circuit occupation area is reduced, and the realization cost is reduced on the premise of not reducing the receiving and transmitting performance.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic diagram of a balanced rf front-end transceiver circuit in the prior art;
fig. 2 is a schematic diagram of four ports of a coupler in an embodiment of the invention;
fig. 3 is a schematic diagram of a balanced rf front end transceiver circuit according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a balanced rf front end transceiver circuit according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a balanced rf front end transceiver circuit according to an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
The embodiment of the utility model provides an in balanced type radio frequency front end receiving and dispatching way include: the device comprises a coupler, a switching network, a load network, a balanced signal transmitting circuit, a balanced signal receiving circuit and an antenna. The following describes the components in the balanced rf front-end transceiver.
The coupler generally includes four ports, i.e., a radio frequency input/output port, a pass-through port, a coupled port, and an isolated port, and the phase relationship between the four ports is shown in fig. 2. The coupler in this embodiment may be a lange coupler, a parallel line coupler, or the like, and this embodiment is not limited.
It should be noted that the balanced rf front-end transceiver circuit may include two or three couplers, and these couplers may be the same or different.
The switching network is an element for controlling the switching of the circuit. The circuit in the embodiment comprises a balanced signal transmitting circuit and a balanced signal receiving circuit, so that the switching network can control the balanced signal transmitting circuit and the balanced signal receiving circuit to be disconnected at the same time; or, the switching network can control the open circuit of the balanced signal transmitting circuit and the open circuit of the balanced signal receiving circuit at the same time.
It should be noted that, the balanced rf front-end transceiver circuit may include a plurality of switching networks, and each switching network may include at least one switching element, and these switching elements may be the same or different. In a specific embodiment, the switching element may be a switching element. Of course, the switching element may be another element capable of controlling the on/off of the circuit, and this embodiment is not limited.
The balanced radio frequency front end transceiver circuit may include two or three load networks, and these load networks may be the same or different.
The balanced signal transmitting circuit is a signal transmitting circuit with a balanced structure, and the circuit structure is described in detail in the following, which is not described herein again.
The balanced signal receiving circuit is a signal receiving circuit with a balanced structure, and the circuit structure is described in detail in the following, which is not described herein again.
In this embodiment, the balanced rf front-end transceiver circuit has three connection relationships among the components, and the three balanced rf front-end transceiver circuits are described below.
1) In the first balanced radio frequency front end receiving and sending circuit, the coupler comprises a first coupler and a second coupler, the switching network comprises a first switching network and a second switching network, the load network comprises a first load network and a second load network, the input end of the balanced signal transmitting circuit and the output end of the balanced signal receiving circuit are connected with the first coupler through the first switching network, the isolation port of the first coupler is connected with the first load network, the output end of the balanced signal transmitting circuit and the input end of the balanced signal receiving circuit are connected with the second coupler through the second switching network, the isolation port of the second coupler is connected with the second load network, the input end and the output end of the second coupler are connected with the antenna, and the input end and the output end of the first coupler are the radio frequency input end and the radio frequency output end of the balanced radio frequency front end receiving and sending circuit.
The working principle of the first balanced rf front-end transceiver circuit is described below.
In the transmitting state, the first switching network and the second switching network are both in the first state, and the first coupler, the balanced signal transmitting circuit and the second coupler are connected. Namely, the radio frequency signal reaches the antenna through the first coupler, the balanced signal transmitting circuit and the second coupler, and is transmitted through the antenna. In this case, the first coupler, the balanced signal receiving circuit, and the second coupler are disconnected.
In the receiving state, the first switching network and the second switching network are both in the second state, and the first coupler, the balanced signal receiving circuit and the second coupler are connected. Namely, the signal received by the antenna passes through the second coupler, the balanced signal receiving circuit and the first coupler to be output. In this case, the first coupler, the balanced signal transmission circuit and the second coupler are disconnected. Wherein the first state and the second state are different.
Because the input end of the balanced signal transmitting circuit and the output end of the balanced signal receiving circuit share the first coupler through the first switching network, and the output end of the balanced signal transmitting circuit and the input end of the balanced signal receiving circuit share the second coupler through the second switching network, the balanced radio frequency front end receiving and transmitting circuit comprises two couplers.
2) In the second balanced radio frequency front end receiving and sending circuit, the coupler comprises a third coupler, a fourth coupler and a fifth coupler, the switching network comprises a third switching network and a fourth switching network, the load network comprises a third load network, a fourth load network and a fifth load network, the input end of the balanced signal transmitting circuit and the output end of the balanced signal receiving circuit are connected with the third coupler through the third switching network, the isolation port of the third coupler is connected with the third load network, the output end of the balanced signal transmitting circuit is connected with the fourth coupler, the isolation port of the fourth coupler is connected with the fourth load network, the input end of the balanced signal receiving circuit is connected with the fifth coupler, the isolation port of the fifth coupler is connected with the fifth load network, the output end of the fourth coupler and the input end of the fifth coupler are connected with the antenna through the fourth switching network, and the input and output end of the third coupler is the radio frequency input and output end of the balanced radio frequency front end receiving and transmitting circuit.
The working principle of the second balanced rf front-end transceiver circuit is described below.
In the transmitting state, the third switching network and the fourth switching network are both in the first state, and the third coupler, the balanced signal transmitting circuit and the fourth coupler are connected. Namely, the radio frequency signal reaches the antenna through the third coupler, the balanced signal transmitting circuit and the fourth coupler, and is transmitted through the antenna. In this case, the third coupler, the balanced signal receiving circuit, and the fifth coupler are disconnected.
In a receiving state, the third switching network and the fourth switching network are both in a second state, and the third coupler, the balanced signal receiving circuit and the fifth coupler are connected. Namely, the signal received by the antenna passes through the fifth coupler, the balanced signal receiving circuit and the third coupler to be output. In this case, the third coupler, the balanced signal transmission circuit and the fourth coupler are disconnected. Wherein the first state and the second state are different.
Because the input end of the balanced signal transmitting circuit and the output end of the balanced signal receiving circuit share the third coupler through the third switching network, the output end of the balanced signal transmitting circuit is connected with the fourth coupler, and the input end of the balanced signal receiving circuit is connected with the fifth coupler, therefore, the balanced radio frequency front end receiving and transmitting circuit comprises three couplers.
3) In the third balanced radio frequency front end receiving and transmitting circuit, the coupler comprises a sixth coupler, a seventh coupler and an eighth coupler, the switching network comprises a fifth switching network, the load network comprises a sixth load network, a seventh load network and an eighth load network, the input end of the balanced signal transmitting circuit is connected with the sixth coupler, the isolation port of the sixth coupler is connected with the sixth load network, the output end of the balanced signal receiving circuit is connected with the seventh coupler, the isolation port of the seventh coupler is connected with the seventh load network, the output end of the balanced signal transmitting circuit and the input end of the balanced signal receiving circuit are connected with the eighth coupler through the fifth switching network, the isolation port of the eighth coupler is connected with the eighth load network, the input end and the output end of the eighth coupler are connected with the antenna, the input end of the sixth coupler is the radio frequency input end of the balanced radio frequency front end receiving and transmitting circuit, the output end of the seventh coupler is the radio frequency output end of the balanced radio frequency front end receiving and transmitting circuit.
The working principle of the third balanced rf front-end transceiver circuit is described below.
In the transmitting state, the fifth switching network is in the first state, and the sixth coupler, the balanced signal transmitting circuit and the eighth coupler are connected. That is, the radio frequency signal reaches the antenna through the sixth coupler, the balanced signal transmitting circuit and the eighth coupler, and is transmitted through the antenna. In this case, the eighth coupler, the balanced signal receiving circuit, and the seventh coupler are disconnected.
In the receiving state, the fifth switching network is in the second state, and the seventh coupler, the balanced signal receiving circuit and the eighth coupler are connected. Namely, the signal received by the antenna passes through the eighth coupler, the balanced signal receiving circuit and the seventh coupler to be output. In this case, the eighth coupler, the balanced signal transmission circuit and the sixth coupler are disconnected. Wherein the first state and the second state are different.
Because the output end of the balanced signal transmitting circuit and the input end of the balanced signal receiving circuit share the eighth coupler through the fifth switching network, the input end of the balanced signal transmitting circuit is connected with the sixth coupler, and the output end of the balanced signal receiving circuit is connected with the seventh coupler, the balanced radio frequency front end receiving and transmitting circuit comprises three couplers.
The balanced signal transmitting circuit in the embodiment comprises a first signal transmitting circuit and a second signal transmitting circuit; the first signal transmitting circuit comprises a first power amplifier, and the second signal transmitting circuit comprises a second power amplifier; the input ends of the first power amplifier and the second power amplifier are the input ends of the balanced signal transmitting circuit, and the output ends of the first power amplifier and the second power amplifier are the output ends of the balanced signal transmitting circuit; the balanced signal receiving circuit comprises a first signal receiving circuit and a second signal receiving circuit; the first signal receiving circuit comprises a first amplitude limiter and a first low-noise amplifier which are connected in series, and the second signal receiving circuit comprises a second amplitude limiter and a second low-noise amplifier which are connected in series; the input ends of the first amplitude limiter and the second amplitude limiter are the input ends of the balanced signal receiving circuit, and the output ends of the first low-noise amplifier and the second low-noise amplifier are the output ends of the balanced signal receiving circuit.
The appropriate power amplifier, limiter and low noise power amplifier can be selected according to the application scene of the balanced radio frequency front end receiving and transmitting circuit.
For the balanced signal transmitting circuit and the balanced signal receiving circuit, the following describes specific structures of three balanced rf front-end receiving and transmitting circuits.
In the first balanced radio frequency front end transceiver circuit, the coupler comprises a first coupler and a second coupler, the switching network comprises a first switching network and a second switching network, and the load network comprises a first load network and a second load network, so that the first switching network comprises a first switching element and a second switching element, and the second switching network comprises a third switching element and a fourth switching element;
a through port of the first coupler is connected with a common port of the first switching element, and two radio frequency ports of the first switching element are respectively connected with an output end of the first low noise amplifier and an input end of the first power amplifier; the coupling port of the first coupler is connected with the common port of the second switching element, and the two radio frequency ports of the second switching element are respectively connected with the output end of the second low noise amplifier and the input end of the second power amplifier;
a coupling port of the second coupler is connected with a common port of a third switching element, and two radio frequency ports of the third switching element are respectively connected with an input end of the first amplitude limiter and an output end of the first power amplifier; and a through port of the second coupler is connected with a common port of a fourth switching element, and two radio frequency ports of the fourth switching element are respectively connected with an input end of the second amplitude limiter and an output end of the second power amplifier.
The isolation port of the first coupler is connected with the first load network, the isolation port of the second coupler is connected with the second load network, and the first load network and the second load network can be the same or different.
Each load network in this embodiment may be comprised of at least one of a resistor, an inductor, and a capacitor. For example, the load network may be composed of a resistor, an inductor, a capacitor, a resistor and a capacitor, an inductor and a capacitor, and so on. The appropriate load network can be selected according to the application scene of the balanced radio frequency front end receiving and transmitting circuit.
If the first Coupler is represented as Coupler1, the second Coupler is represented as Coupler2, the first to fourth switching elements are represented as switching elements 1-4, the first power amplifier is represented as PA1, the second power amplifier is represented as PA2, the first Limiter is represented as Limiter1, the second Limiter is represented as Limiter2, the first LNA is represented as LNA1, the second LNA is represented as LNA2, the ① of the Coupler is represented as an input/output terminal, the ② is represented as a pass-through port, the ③ is represented as a coupling port, the ④ is represented as an isolation port, the first load network is represented as load network 1, and the second load network is represented as load network 2, please refer to the first balanced rf front-end transceiver circuit shown in fig. 3.
In a transmitting state, a radio frequency signal is converted into two paths of signals after passing through a radio frequency input/output port of the Coupler1, wherein one path of signal is input to the PA1 through the switching element 1, and the signal is amplified through the PA1 and then input to a coupling port of the Coupler2 through the switching element 3; the other path of signal is input to the PA2 through the switching element 2, the signal is amplified through the PA2, and then input to the through port of the Coupler2 through the switching element 4, and the two paths of signal are combined into a single path of signal through the Coupler2, and then radiated out through the antenna.
In a receiving state, a signal received by the antenna is converted into two paths of signals through the Coupler2, wherein one path of signal is input to the Limiter1 through the coupling port of the Coupler2 and the switching element 3, the signal is input to the switching element 1 after being subjected to amplitude limiting of the Limiter1 and amplification of the LNA1, and the signal is input to the through port of the Coupler1 through the switching element 1; the other path of signal is input to the Limiter2 through the through port of the Coupler2 and the switching element 4, the signal is input to the switching element 2 after being limited by the Limiter2 and amplified by the LNA2, the signal is input to the coupling port of the Coupler1 through the switching element 2, and the two paths of signals are combined into a single path of signal through the Coupler1 and then output to the radio frequency signal input/output port.
The coupler comprises a third coupler, a fourth coupler and a fifth coupler, the switching network comprises a third switching network and a fourth switching network, the load network comprises a third load network, a fourth load network and a fifth load network, the third switching network comprises a fifth switching element and a sixth switching element, and the fourth switching network comprises a seventh switching element;
a coupling port of the third coupler is connected with a common port of a fifth switching element, and two radio frequency ports of the fifth switching element are respectively connected with an output end of the first low noise amplifier and an input end of the first power amplifier; a through port of the third coupler is connected with a common port of a sixth switching element, and two radio frequency ports of the sixth switching element are respectively connected with an output end of the second low noise amplifier and an input end of the second power amplifier;
the output end of the first power amplifier is connected with the through port of the fourth coupler, the output end of the second power amplifier is connected with the coupling port of the fourth coupler, and the output end of the fourth coupler is connected with one radio frequency port of the seventh switching element;
the input end of the first amplitude limiter is connected with the coupling port of the fifth coupler, the input end of the second amplitude limiter is connected with the through port of the fifth coupler, and the input end of the fifth coupler is connected with the other radio frequency port of the seventh switching element;
the common port of the seventh switching element is connected to the antenna.
The isolation port of the third coupler is connected to the third load network, the isolation port of the fourth coupler is connected to the fourth load network, the isolation port of the fifth coupler is connected to the fifth load network, and the structure of each load network is described in detail in the first balanced radio frequency front end transceiver circuit.
If the third to fifth couplers are designated as Coupler3-5, the fifth to seventh switching elements are designated as switching elements 5-7, the first power amplifier is designated as PA1, the second power amplifier is designated as PA2, the first Limiter is designated as Limiter1, the second Limiter is designated as Limiter2, the first LNA1, the second LNA2, the Coupler ① is designated as input/output, ② is designated as pass-through port, ③ is designated as coupling port, ④ is designated as isolation port, and the third to fifth load networks are designated as load networks 3-5, please refer to the second balanced rf front-end transceiver shown in fig. 4.
In a transmitting state, a radio frequency signal is converted into two paths of signals after passing through a radio frequency input/output port of the Coupler3, wherein one path of signal is input into the PA1 through the switching element 5, and the signal is amplified through the PA1 and then input into a through port of the Coupler 4; the other signal is input to the PA2 through the switching element 6, the signal is input to the coupling port of the Coupler4 after being amplified by the PA2, the two signals are combined into a single signal through the Coupler4, and the single signal output by the output port of the Coupler4 is input to the antenna through the switching element 7 and then radiated out through the antenna.
In a receiving state, a signal received by an antenna is input to an input end of the Coupler5 through the switching element 7, and is converted into two paths of signals through the Coupler5, wherein one path of signal is input to the Limiter1 through a coupling port of the Coupler5, the signal is input to the switching element 5 after being limited by the Limiter1 and amplified by the LNA1, and is input to a coupling port of the Coupler3 through the switching element 5; the other path of signal is input to the Limiter2 through the through port of the Coupler5, the signal is input to the switching element 6 after being subjected to amplitude limiting of the Limiter2 and amplification of the LNA2, the signal is input to the through port of the Coupler3 through the switching element 6, and the two paths of signals are combined into a single path of signal through the Coupler3 and then output to the radio frequency signal input/output port.
The coupler comprises a sixth coupler, a seventh coupler and an eighth coupler, the switching network comprises a fifth switching network, the load network comprises a sixth load network, a seventh load network and an eighth load network, and the fifth switching network comprises an eighth switching element and a ninth switching element;
a through port of the sixth coupler is connected with the input end of the first power amplifier, and a coupling port of the sixth coupler is connected with the input end of the second power amplifier;
a through port of the seventh coupler is connected with the output end of the first low noise amplifier, and a coupling port of the seventh coupler is connected with the output end of the second low noise amplifier;
a through port of the eighth coupler is connected with a common port of the eighth switching element, and two radio frequency ports of the eighth switching element are respectively connected with the input end of the first amplitude limiter and the output end of the second power amplifier; and a coupling port of the eighth coupler is connected with a common port of the ninth switching element, and two radio frequency ports of the ninth switching element are respectively connected with an input end of the second amplitude limiter and an output end of the first power amplifier.
The isolation port of the sixth coupler is connected to the sixth load network, the isolation port of the seventh coupler is connected to the seventh load network, the isolation port of the eighth coupler is connected to the eighth load network, and the structure of each load network is described in detail in the first balanced rf front-end transceiver circuit.
If the sixth to eighth couplers are designated as Coupler6-8, the eighth to ninth switching elements are designated as switching elements 8-9, the first power amplifier is designated as PA1, the second power amplifier is designated as PA2, the first Limiter is designated as Limiter1, the second Limiter is designated as Limiter2, the first LNA1, the second LNA2, the Coupler ① is designated as input/output, ② is designated as pass-through port, ③ is designated as coupling port, ④ is designated as isolation port, and the sixth to eighth load networks are designated as load networks 6-8, please refer to the third balanced rf front-end transceiver circuit shown in fig. 5.
In a transmitting state, a radio frequency signal is converted into two paths of signals after passing through an input port of the Coupler6, wherein one path of signal is input into the PA1 through a through port of the Coupler6, and the signal is amplified by the PA1 and then input into a coupling port of the Coupler8 through the switching element 9; the other path of signal is input to the PA2 through the coupling port of the Coupler6, the signal is amplified by the PA2 and then output to the through port of the Coupler8 through the switching element 8, the two paths of signals are combined into a single path of signal through the Coupler8, and then the single path of signal is radiated by the antenna.
In a receiving state, a signal received by the antenna is converted into two paths of signals through the Coupler8, wherein one path of signal is input to the Limiter1 through the through port of the Coupler8 and the switching element 8, and the signal is input to the through port of the Coupler7 after being limited by the Limiter1 and amplified by the LNA 1; the other path of signal is input to the Limiter2 through the coupling port of the Coupler8 and the switching element 9, the signal is input to the coupling port of the Coupler7 after being limited by the Limiter2 and amplified by the LNA2, and the two paths of signal are combined into a single path of signal through the Coupler7 and then output to the output port of the Coupler 7.
It should be noted that the three balanced radio frequency front end transceiver circuits can be implemented by an on-chip integration process or by a discrete component process. When an on-chip integration process is used, the process may be implemented by gallium arsenide (GaAs) or a Complementary Metal Oxide Semiconductor (CMOS) process. When a discrete component process is adopted, each component in the balanced radio frequency front end receiving and transmitting circuit can be regarded as a chip and integrated into a subsystem or a module in a block diagram in a micro-assembly mode.
In one embodiment, the present embodiment further provides a radar system including a balanced rf front-end transceiver circuit as shown in any one of fig. 3 to 5.
The radar system may include a phased array assembly, and the phased array assembly includes a balanced rf front-end transceiver circuit as shown in any one of fig. 3 to 5.
In one embodiment, the present embodiment further provides a communication system, which includes a balanced rf front-end transceiver circuit as shown in any one of fig. 3 to 5.
The communication system may include a phased array component, and the phased array component includes a balanced rf front end transceiver circuit as shown in any one of fig. 3 to 5.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The above description should not be taken as limiting the embodiments of the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the embodiments of the present invention should be included in the scope of the embodiments of the present invention.
Claims (8)
1. A balanced radio frequency front end transceiver circuit, characterized in that, balanced radio frequency front end transceiver circuit includes: the system comprises a coupler, a switching network, a load network, a balanced signal transmitting circuit, a balanced signal receiving circuit and an antenna;
the coupler comprising a first coupler and a second coupler, the switching network comprising a first switching network and a second switching network, the load network comprises a first load network and a second load network, the input end of the balanced signal transmitting circuit and the output end of the balanced signal receiving circuit are connected with the first coupler through the first switching network, the isolation port of the first coupler is connected with the first load network, the output end of the balanced signal transmitting circuit and the input end of the balanced signal receiving circuit are connected with the second coupler through the second switching network, the isolation port of the second coupler is connected with the second load network, the input and output ends of the second coupler are connected with the antenna, the input and output end of the first coupler is the radio frequency input and output end of the balanced radio frequency front end receiving and transmitting circuit; alternatively, the first and second electrodes may be,
the coupler comprises a third coupler, a fourth coupler and a fifth coupler, the switching network comprises a third switching network and a fourth switching network, the load network comprises a third load network, a fourth load network and a fifth load network, the input end of the balanced signal transmitting circuit and the output end of the balanced signal receiving circuit are connected with the third coupler through the third switching network, the isolation port of the third coupler is connected with the third load network, the output end of the balanced signal transmitting circuit is connected with the fourth coupler, the isolation port of the fourth coupler is connected with the fourth load network, the input end of the balanced signal receiving circuit is connected with the fifth coupler, the isolation port of the fifth coupler is connected with the fifth load network, and the output end of the fourth coupler and the input end of the fifth coupler are connected with the fourth switching network through the fourth switching network The input and output ends of the third coupler are the radio frequency input and output ends of the balanced radio frequency front end receiving and transmitting circuit; alternatively, the first and second electrodes may be,
the coupler comprises a sixth coupler, a seventh coupler and an eighth coupler, the switching network comprises a fifth switching network, the load network comprises a sixth load network, a seventh load network and an eighth load network, the input end of the balanced signal transmitting circuit is connected with the sixth coupler, the isolation port of the sixth coupler is connected with the sixth load network, the output end of the balanced signal receiving circuit is connected with the seventh coupler, the isolation port of the seventh coupler is connected with the seventh load network, the output end of the balanced signal transmitting circuit and the input end of the balanced signal receiving circuit are connected with the eighth coupler through the fifth switching network, the isolation port of the eighth coupler is connected with the eighth load network, and the input and output ends of the eighth coupler are connected with the antenna, the input end of the sixth coupler is the radio frequency input end of the balanced radio frequency front end receiving and transmitting circuit, and the output end of the seventh coupler is the radio frequency output end of the balanced radio frequency front end receiving and transmitting circuit.
2. The balanced radio frequency front end transceiver circuit of claim 1,
the balanced signal transmitting circuit comprises a first signal transmitting circuit and a second signal transmitting circuit; the first signal transmitting circuit comprises a first power amplifier, and the second signal transmitting circuit comprises a second power amplifier; the input ends of the first power amplifier and the second power amplifier are the input ends of the balanced signal transmitting circuit, and the output ends of the first power amplifier and the second power amplifier are the output ends of the balanced signal transmitting circuit;
the balanced signal receiving circuit comprises a first signal receiving circuit and a second signal receiving circuit; the first signal receiving circuit comprises a first amplitude limiter and a first low noise amplifier which are connected in series, and the second signal receiving circuit comprises a second amplitude limiter and a second low noise amplifier which are connected in series; the input ends of the first amplitude limiter and the second amplitude limiter are the input ends of the balanced signal receiving circuit, and the output ends of the first low-noise amplifier and the second low-noise amplifier are the output ends of the balanced signal receiving circuit.
3. The balanced radio frequency front end transceiver circuit of claim 2, wherein the coupler comprises a first coupler and a second coupler, the switching network comprises a first switching network and a second switching network, and the load network comprises a first load network and a second load network, then the first switching network comprises a first switching element and a second switching element, and the second switching network comprises a third switching element and a fourth switching element;
a through port of the first coupler is connected with a common port of the first switching element, and two radio frequency ports of the first switching element are respectively connected with an output end of the first low noise amplifier and an input end of the first power amplifier; a coupling port of the first coupler is connected with a common port of the second switching element, and two radio frequency ports of the second switching element are respectively connected with an output end of the second low noise amplifier and an input end of the second power amplifier;
a coupling port of the second coupler is connected with a common port of the third switching element, and two radio frequency ports of the third switching element are respectively connected with an input end of the first amplitude limiter and an output end of the first power amplifier; and a through port of the second coupler is connected with a common port of the fourth switching element, and two radio frequency ports of the fourth switching element are respectively connected with an input end of the second amplitude limiter and an output end of the second power amplifier.
4. The balanced radio frequency front end transceiver circuit of claim 2, wherein the coupler comprises a third coupler, a fourth coupler, and a fifth coupler, the switching network comprises a third switching network and a fourth switching network, and the load network comprises a third load network, a fourth load network, and a fifth load network, then the third switching network comprises a fifth switching element and a sixth switching element, and the fourth switching network comprises a seventh switching element;
a coupling port of the third coupler is connected with a common port of the fifth switching element, and two radio frequency ports of the fifth switching element are respectively connected with an output end of the first low noise amplifier and an input end of the first power amplifier; a through port of the third coupler is connected with a common port of the sixth switching element, and two radio frequency ports of the sixth switching element are respectively connected with an output end of the second low noise amplifier and an input end of the second power amplifier;
an output end of the first power amplifier is connected with a through port of the fourth coupler, an output end of the second power amplifier is connected with a coupling port of the fourth coupler, and an output end of the fourth coupler is connected with one radio frequency port of the seventh switching element;
the input end of the first amplitude limiter is connected with the coupling port of the fifth coupler, the input end of the second amplitude limiter is connected with the through port of the fifth coupler, and the input end of the fifth coupler is connected with the other radio frequency port of the seventh switching element;
the common port of the seventh switching element is connected to the antenna.
5. The balanced radio frequency front end transceiver circuit of claim 2, wherein the coupler comprises a sixth coupler, a seventh coupler, and an eighth coupler, the switching network comprises a fifth switching network, and the load network comprises a sixth load network, a seventh load network, and an eighth load network, the fifth switching network comprises an eighth switching element and a ninth switching element;
a through port of the sixth coupler is connected with the input end of the first power amplifier, and a coupling port of the sixth coupler is connected with the input end of the second power amplifier;
a through port of the seventh coupler is connected with the output end of the first low noise amplifier, and a coupling port of the seventh coupler is connected with the output end of the second low noise amplifier;
a through port of the eighth coupler is connected to a common port of the eighth switching element, and two rf ports of the eighth switching element are respectively connected to an input terminal of the first limiter and an output terminal of the second power amplifier; and a coupling port of the eighth coupler is connected with a common port of the ninth switching element, and two radio frequency ports of the ninth switching element are respectively connected with an input end of the second amplitude limiter and an output end of the first power amplifier.
6. The balanced radio frequency front end transceiver circuit according to any one of claims 1 to 5, wherein each load network is comprised of at least one of a resistor, an inductor and a capacitor.
7. A radar system comprising a balanced radio frequency front end transceiver circuit as claimed in any one of claims 1 to 6.
8. A communication system, characterized in that the communication system comprises a balanced radio frequency front end transceiver circuit according to any of claims 1 to 6.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111211805A (en) * | 2020-03-24 | 2020-05-29 | 上海安其威微电子科技有限公司 | Balanced radio frequency front end receiving and transmitting circuit, system and control method thereof |
| CN112202443A (en) * | 2020-09-25 | 2021-01-08 | 武汉中科医疗科技工业技术研究院有限公司 | Radio frequency switch device and radio frequency switch system |
| CN112311465A (en) * | 2020-10-30 | 2021-02-02 | 南京国博电子有限公司 | Microwave transceiving front-end circuit |
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- 2020-03-24 CN CN202020383101.2U patent/CN210780780U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111211805A (en) * | 2020-03-24 | 2020-05-29 | 上海安其威微电子科技有限公司 | Balanced radio frequency front end receiving and transmitting circuit, system and control method thereof |
| CN112202443A (en) * | 2020-09-25 | 2021-01-08 | 武汉中科医疗科技工业技术研究院有限公司 | Radio frequency switch device and radio frequency switch system |
| CN112311465A (en) * | 2020-10-30 | 2021-02-02 | 南京国博电子有限公司 | Microwave transceiving front-end circuit |
| CN112311465B (en) * | 2020-10-30 | 2024-06-11 | 南京国博电子股份有限公司 | Microwave receiving and transmitting front-end circuit |
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