CN115940991A - High-isolation L-band transmitting-receiving passive annular assembly and working method thereof - Google Patents
High-isolation L-band transmitting-receiving passive annular assembly and working method thereof Download PDFInfo
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- CN115940991A CN115940991A CN202310182916.2A CN202310182916A CN115940991A CN 115940991 A CN115940991 A CN 115940991A CN 202310182916 A CN202310182916 A CN 202310182916A CN 115940991 A CN115940991 A CN 115940991A
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Abstract
The invention provides a high-isolation L-band transceiving passive annular component and a working method thereof, wherein the high-isolation L-band transceiving passive annular component comprises a transmitting synthesis network, a receiving synthesis network and a transmitting leakage cancellation network, wherein the transmitting synthesis network, the receiving synthesis network and the transmitting leakage cancellation network are formed by a plurality of electric bridges, circulators and/or 180-degree phase shifters; wherein part of the bridges, circulators and/or 180 ° phase shifters are multiplexed in the transmit combining network, the receive combining network and the transmit leakage cancellation network. The invention can realize normal signal receiving while the L-band communication equipment transmits signals.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a high-isolation L-band transceiving passive ring component and a working method thereof.
Background
High power communication devices operating at L-band frequencies often communicate with each other using half-duplex (time division multiple access) operation. When a communication transmitter transmits signals, because the transmitting power is high (the signal power reaches more than 100W), a receiving channel is generally disconnected by adopting a transmitting-receiving isolating switch (more than 40 dB) in a receiver, so that the phenomenon that the transmitting signals leak to the receiving channel to cause signal saturation of the receiving channel and even burn the receiver is avoided. This requires that the communication device must operate in half duplex mode, i.e., transmit with the receiver turned off or off. The method is simple and easy to implement, but also causes that the communication equipment cannot normally receive signals when transmitting, thereby causing the waste of time resources; this waste of time is even more enormous and intolerable when multiple communication devices are networked.
Therefore, an L-band transceiving passive ring component of a communication device needs to be designed innovatively, isolation of transceiving channels is improved, and the purposes that when a communication transmitter transmits a high-power signal, a receiving channel is not closed, a transmitting signal leaked to the receiving channel is inhibited and attenuated by more than 40dB, and signal saturation of the receiving channel is not caused are achieved. At present, there is no relevant literature report and data about normal signal receiving of L-band high-power communication equipment at home and abroad when transmitting signals.
Disclosure of Invention
The invention aims to provide a high-isolation L-band transceiving passive ring component and a working method thereof, so that signals can be normally received while L-band communication equipment transmits the signals.
The invention provides a high-isolation L-band transceiving passive annular component, which comprises a transmitting synthesis network, a receiving synthesis network and a transmitting leakage cancellation network, wherein the transmitting synthesis network comprises a transmitting receiving end and a transmitting leakage cancellation end; the transmitting synthesis network, the receiving synthesis network and the transmitting leakage cancellation network all comprise a plurality of electric bridges, circulators and/or 180-degree phase shifters; wherein several bridges, circulators and/or 180 ° phase shifters are multiplexed in a transmit combining network, a receive combining network and a transmit leakage cancellation network.
Further, the transmitting synthesis network comprises a first bridge, a second bridge, a first circulator, a second circulator and a 180-degree phase shifter; a first port of the first bridge is a transmitting input end, a second port of the first bridge is grounded, a third port of the first bridge is connected with a first port of the first circulator, and a fourth port of the first bridge is connected with a first port of the second circulator; a port II of the circulator I is connected with a port I of the bridge II; a second port of the circulator II is connected with a second port of the bridge II through a 180-degree phase shifter; and the third port of the second bridge is connected with the antenna, and the fourth port of the second bridge is grounded.
Further, the receiving synthesis network comprises a second bridge, a third bridge, a first circulator, a second circulator and a 180-degree phase shifter; a port III of the circulator I is connected with a port II of the bridge III; a port III of the circulator II is connected with a port I of the bridge III; and a third port of the third bridge is grounded, and a fourth port of the third bridge is a receiving output end.
Further, the transmission leakage cancellation network comprises a first bridge, a third bridge, a first circulator and a second circulator.
Further, the working method of the high-isolation L-band transceiving passive ring component includes:
transmitting and synthesizing output through a transmitting and synthesizing network;
receiving the synthesized output through a receiving synthesis network;
and carrying out transmission leakage signal cancellation through the transmission leakage cancellation network.
Further, the process of transmitting the synthesized output through the transmission synthesis network includes:
the transmitting signal input by the transmitting input end is input to the first bridge from the first port of the first bridge;
the first bridge divides the transmitting signal into two paths, and the second path of transmitting signal output by the port four of the first bridge is compared with the first path of transmitting signal output by the port three, so that the amplitude is the same and the phase lags by 90 degrees;
the first path of emission signal reaches a first port of a second electric bridge after passing through a first circulator, the second path of emission signal sequentially passes through a second circulator and a 180-degree phase shifter and then reaches a second port of the second electric bridge, and the second path of emission signal has the same amplitude and is delayed by 270 degrees compared with the first path of emission signal;
the second bridge synthesizes the first path of emission signal and the second path of emission signal and outputs the signals through the third port of the second bridge, the phase difference is 360 degrees, the amplitudes are added exactly, and the emission energy loss can not be caused.
Further, the process of receiving the synthesized output through the receiving synthesis network includes:
the antenna inputs a receiving signal and inputs the signal into the second bridge from a third port of the second bridge;
the second bridge divides the received signal into two paths, and the second path of received signal output by the second port of the second bridge is compared with the first path of received signal output by the first port, so that the amplitude is the same and the phase lags by 90 degrees;
the first path of received signals reach a second port of the third electric bridge after passing through the first circulator, and the second path of received signals sequentially pass through the 180-degree phase shifter and the second circulator and then reach the first port of the third electric bridge; at the moment, the second receiving signal is compared with the first receiving signal, the amplitude is the same, and the phase lags by 270 degrees;
the third bridge synthesizes the first path of received signal and the second path of received signal and outputs the signals through the fourth port of the third bridge, the phase difference is 360 degrees, the amplitudes are just added, and the received energy loss can not be caused.
Further, the process of performing transmission leakage signal cancellation through the transmission leakage cancellation network includes:
after the first bridge divides the transmission signal into two paths, the first path of transmission leakage signal generated by the first circulator directly reaches the second port of the third bridge, the second path of transmission leakage signal generated by the second circulator directly reaches the first port of the third bridge, and the second path of transmission leakage signal is compared with the first path of transmission leakage signal, has the same amplitude and lags behind the phase by 90 degrees;
and the third bridge synthesizes the first path of emission leakage signal and the second path of emission leakage signal, and outputs the synthesized signals from the port four of the third bridge, the phase difference is 180 degrees, and the phase difference is just the amplitude difference, so that the emission leakage signal cancellation is realized.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the invention integrates the transmitting synthesis network, the receiving synthesis network and the transmitting leakage cancellation network into a passive annular component, and skillfully utilizes the leakage signals of two circulators and the phase shift characteristic of the four-port bridge to realize the transmitting signal synthesis cancellation leaked to a receiving channel, so that the L-band high-power communication equipment can normally receive signals transmitted by other communication equipment while transmitting signals, and the full duplex work of a transmitting and receiving link of the communication equipment is realized. The working mode avoids the defect that the L-band high-power communication equipment cannot normally receive signals when the signals are transmitted; especially when the multi-device networking works, the full utilization of time resources is facilitated.
2. The invention has the characteristics of simplicity and practicality, and the transmitting synthesis network, the receiving synthesis network and the transmitting leakage cancellation network in the passive annular component multiplex a plurality of components and parts to respectively realize respective functions.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic diagram of the composition of an L-band communication system.
Fig. 2 is a schematic diagram of a high isolation L-band transceiver passive ring assembly according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of the components of the transmit synthetic network in the embodiment of the present invention.
Fig. 4 is a schematic diagram illustrating the components of the receiving composite network according to the embodiment of the present invention.
Fig. 5 is a schematic diagram of the components of the transmission leakage cancellation network according to the embodiment of the present invention.
FIG. 6 is a schematic diagram of a circulator-based transceiver according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
As shown in fig. 1, the L-band communication system is composed of a plurality of communication apparatuses, and the communication apparatuses communicate with each other in a time division multiple access manner. When the transmitting extension set of the communication equipment works, the receiving channel needs to be disconnected due to the fact that the transmitting power is large (the signal power is not less than 100W), and it is guaranteed that components of the receiving channel are not blocked or burnt by the transmitting leakage signal. Actually, at this time, the receiving channel of the communication device is in an inoperative state, and cannot normally receive signals, which causes waste of time resources; this waste of time is even more enormous and intolerable when multiple communication devices are networked. Therefore, as shown in fig. 2, the present embodiment provides a high-isolation L-band transceiving passive ring component, which includes a transmit combining network, a receive combining network, and a transmit leakage cancellation network; the transmitting synthesis network, the receiving synthesis network and the transmitting leakage cancellation network all comprise a plurality of electric bridges, circulators and/or 180-degree phase shifters; wherein several bridges, circulators and/or 180 ° phase shifters are multiplexed in a transmit combining network, a receive combining network and a transmit leakage cancellation network. The working method of the high-isolation L-band transceiving passive ring component comprises the following steps:
transmitting and synthesizing output through a transmitting and synthesizing network;
receiving the synthesized output through a receiving synthesis network;
and carrying out transmission leakage signal cancellation through the transmission leakage cancellation network.
Specifically, the method comprises the following steps:
as shown in fig. 3, the transmit combining network includes bridge one, bridge two, circulator one, circulator two, and a 180 ° phase shifter; a first port of the first bridge is a transmitting input end, a second port of the first bridge is grounded, a third port of the first bridge is connected with a first port of the first circulator, and a fourth port of the first bridge is connected with a first port of the second circulator; a port II of the circulator I is connected with a port I of the bridge II; a second port of the circulator II is connected with a second port of the bridge II through a 180-degree phase shifter; and the third port of the second bridge is connected with the antenna, and the fourth port of the second bridge is grounded. Thus, the process of transmitting the composite output over the transmit composite network includes:
the transmitting signal input by the transmitting input end is input to the first bridge from the first port of the first bridge;
the first bridge divides the transmitting signal into two paths, and the second path of transmitting signal output by the port four of the first bridge is compared with the first path of transmitting signal output by the port three, so that the amplitude is the same and the phase lags by 90 degrees;
the first path of emission signal reaches a first port of a second electric bridge after passing through a first circulator, the second path of emission signal sequentially passes through a second circulator and a 180-degree phase shifter and then reaches a second port of the second electric bridge, and the second path of emission signal has the same amplitude and is delayed by 270 degrees compared with the first path of emission signal;
the second bridge synthesizes the first path of emission signal and the second path of emission signal and outputs the signals through the third port of the second bridge, the phase difference is 360 degrees, the amplitudes are added exactly, and the emission energy loss can not be caused.
As shown in fig. 4, the receiving combining network includes bridge two, bridge three, circulator one, circulator two, and a 180 ° phase shifter; a port III of the circulator I is connected with a port II of the bridge III; a port III of the circulator II is connected with a port I of the bridge III; and a third port of the third bridge is grounded, and a fourth port of the third bridge is a receiving output end. Thus, the process of receiving a composite output over a receive composite network comprises:
an antenna input receiving signal is input into the second electric bridge from a third port of the second electric bridge;
the second bridge divides the received signal into two paths, and the second path of received signal output by the second port of the second bridge is compared with the first path of received signal output by the first port, so that the amplitude is the same and the phase lags by 90 degrees;
the first path of received signals reach a second port of the third electric bridge after passing through the first circulator, and the second path of received signals sequentially pass through the 180-degree phase shifter and the second circulator and then reach the first port of the third electric bridge; at the moment, the second path of receiving signals are compared with the first receiving signals, the amplitudes are the same, and the phase lags by 270 degrees;
the third bridge synthesizes the first path of received signal and the second path of received signal, and outputs the synthesized signals through the port four of the third bridge, the phase difference is 360 degrees, the amplitudes are exactly added, and the received energy loss can not be caused.
As shown in fig. 5, the transmission leakage cancellation network includes a first bridge, a third bridge, a first circulator and a second circulator. Thus, the process of performing transmission leakage signal cancellation by the transmission leakage cancellation network comprises:
after the first bridge divides the transmission signal into two paths, the first path of transmission leakage signal generated by the first circulator directly reaches the second port of the third bridge, the second path of transmission leakage signal generated by the second circulator directly reaches the first port of the third bridge, and the second path of transmission leakage signal is compared with the first path of transmission leakage signal, has the same amplitude and lags behind the phase by 90 degrees;
and the third bridge synthesizes the first path of emission leakage signal and the second path of emission leakage signal, and outputs the synthesized signals from the port four of the third bridge, the phase difference is 180 degrees, and the phase difference is just the amplitude difference, so that the emission leakage signal cancellation is realized. The isolation of the L-band circulator is generally 20dB, is influenced by the phase and amplitude consistency of the bridge and the circulator, and can reach over 42dB from 960MHz to 1250MHz in practical test.
When the signal power of the transmission signal reaches 100W (50 dBmW), it is radiated from the antenna through the circulator as shown in fig. 6; since the circulator has an isolation of 20dB, a leakage of a transmit signal power to a receive output terminal of 30 dBmW will result in saturation or burnout of the low noise amplifier at the receive output terminal (the maximum input signal of the L-band low noise amplifier does not exceed 20 dBmW). And the transmitting signal radiates out from the antenna through the high-isolation L-band transmitting-receiving passive annular component as shown in fig. 2, because the isolation of the component reaches 42dB, the signal power of the transmitting signal leaked to the receiving output end is 8dBmW and does not exceed the maximum input signal power of the low-noise amplifier, the normal work of a receiving channel can be ensured, and the transmitting-receiving full-duplex work of the communication equipment is realized.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A high-isolation L-band transceiving passive ring component is characterized by comprising a transmitting synthesis network, a receiving synthesis network and a transmitting leakage cancellation network; the transmitting synthesis network, the receiving synthesis network and the transmitting leakage cancellation network all comprise a plurality of electric bridges, circulators and/or 180-degree phase shifters; wherein several bridges, circulators and/or 180 ° phase shifters are multiplexed in a transmit combining network, a receive combining network and a transmit leakage cancellation network.
2. The highly isolated L-band transceiver passive ring assembly of claim 1, wherein the transmit combining network comprises bridge one, bridge two, circulator one, circulator two, and a 180 ° phase shifter; a first port of the first bridge is a transmitting input end, a second port of the first bridge is grounded, a third port of the first bridge is connected with a first port of the first circulator, and a fourth port of the first bridge is connected with a first port of the second circulator; a port II of the circulator I is connected with a port I of the bridge II; a second port of the circulator II is connected with a second port of the bridge II through a 180-degree phase shifter; and a third port of the second bridge is connected with the antenna, and a fourth port of the second bridge is grounded.
3. The highly isolated L-band transceiver passive ring assembly of claim 2, wherein the receive combining network comprises bridge two, bridge three, circulator one, circulator two, and a 180 ° phase shifter; a port III of the circulator I is connected with a port II of the bridge III; a port III of the circulator II is connected with a port I of the bridge III; and a third port of the third bridge is grounded, and a fourth port of the third bridge is a receiving output end.
4. The highly isolated L-band transceiver passive ring assembly of claim 3, wherein the transmit leakage cancellation network comprises bridge one, bridge three, circulator one, and circulator two.
5. A method of operating a high isolation L-band transceiver passive ring assembly as claimed in any of claims 1-3, comprising:
transmitting and synthesizing output through a transmitting and synthesizing network;
receiving the synthesized output through a receiving synthesis network;
and carrying out transmission leakage signal cancellation through the transmission leakage cancellation network.
6. The method of claim 5, wherein said transmitting a composite output via a transmit composite network comprises:
a transmitting signal is input from a transmitting input end and is input into a first electric bridge from a first port of the first electric bridge;
the first electric bridge divides the transmission signal into two paths, and the second path of transmission signal output by the port four of the first electric bridge is compared with the first path of transmission signal output by the port three, so that the amplitudes are the same, and the phase lag is 90 degrees;
the first path of transmitting signal reaches a first port of a second electric bridge after passing through a first circulator, the second path of transmitting signal reaches a second port of the second electric bridge after sequentially passing through a second circulator and a 180-degree phase shifter, and the second path of transmitting signal has the same amplitude and is delayed by 270 degrees compared with the first path of transmitting signal;
the second bridge synthesizes the first path of emission signal and the second path of emission signal and outputs the signals through the third port of the second bridge, the phase difference is 360 degrees, the amplitudes are added exactly, and the emission energy loss can not be caused.
7. The method of claim 6, wherein said receiving a composite output over a receive composite network comprises:
the antenna inputs a receiving signal and inputs the signal into the second bridge from a third port of the second bridge;
the second electric bridge divides the received signals into two paths, and the second path of received signals output by the second port of the second electric bridge are compared with the first path of received signals output by the first port, so that the amplitudes are the same, and the phase lags by 90 degrees;
the first path of received signals reach a second port of the third electric bridge after passing through the first circulator, and the second path of received signals sequentially pass through the 180-degree phase shifter and the second circulator and then reach the first port of the third electric bridge; at the moment, the second path of receiving signals are compared with the first receiving signals, the amplitudes are the same, and the phase lags by 270 degrees;
the third bridge synthesizes the first path of received signal and the second path of received signal, and outputs the synthesized signals through the port four of the third bridge, the phase difference is 360 degrees, the amplitudes are exactly added, and the received energy loss can not be caused.
8. The method according to claim 7, wherein said cancellation of the transmission leakage signal via the transmission leakage cancellation network comprises:
after the first bridge divides the transmission signal into two paths, a first path of transmission leakage signal generated by the first circulator directly reaches a second port of the third bridge, a second path of transmission leakage signal generated by the second circulator directly reaches a first port of the third bridge, and the second path of transmission leakage signal is compared with the first path of transmission leakage signal, has the same amplitude and lags behind by 90 degrees in phase;
and the third bridge synthesizes the first path of emission leakage signal and the second path of emission leakage signal, and outputs the synthesized signals from the port four of the third bridge, the phase difference is 180 degrees, and the phase difference is just the amplitude difference, so that the emission leakage signal cancellation is realized.
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