CN110658562A - Millimeter wave transceiving switch array and control method thereof - Google Patents
Millimeter wave transceiving switch array and control method thereof Download PDFInfo
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- CN110658562A CN110658562A CN201911013070.XA CN201911013070A CN110658562A CN 110658562 A CN110658562 A CN 110658562A CN 201911013070 A CN201911013070 A CN 201911013070A CN 110658562 A CN110658562 A CN 110658562A
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Abstract
The invention discloses a millimeter wave receiving and transmitting switch array, which comprises a transmitting switch array and a receiving switch array, wherein the receiving switch array at least comprises a primary receiving switch chip, a secondary receiving switch chip and a low noise amplifier; the low noise amplifiers connected with the corresponding input lines between the first-stage receiving switch chips are connected with a control power supply through the same control line, and at least one control line is connected with at least two low noise amplifiers. In the use process, the time of dozens of microseconds is usually needed for controlling the stability of the power chip of the low-noise amplifier, and the control power supply in the invention controls the power supply to pre-start a plurality of low-noise amplifiers through the same control line, so that the time for stabilizing the power chip is saved, the quick response of the millimeter wave receiving and transmitting switch array is realized, and the scanning time of the millimeter security inspection system is further reduced. The invention also provides a control method, which also has the beneficial effects.
Description
Technical Field
The invention relates to the technical field of millimeter waves, in particular to a millimeter wave receiving and dispatching switch array and a control method of the millimeter wave receiving and dispatching switch array.
Background
The millimeter wave is called as millimeter wave, the wavelength of which is from 10 mm to 1 mm, and the frequency of which is from 30GHz to 300GHz, and the millimeter wave is permeable to clothes, so that the millimeter wave human body security check instrument is an efficient and convenient way for future human body security check. Whether the human body carries forbidden articles such as a ceramic knife, a plastic knife and the like can be conveniently and quickly detected through the millimeter wave human body security check instrument.
In the prior art, two-dimensional scanning of a human body is usually realized by adopting a one-dimensional mechanical scanning and a one-dimensional switch linear array electrical scanning mode. However, the response speed of the conventional switch array chip is low, so that the scanning time of the millimeter wave human body security inspection system is too long. Therefore, how to improve the response speed of the millimeter wave transceiving switch array is an urgent problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a millimeter wave transceiving switch array which has higher response speed; another object of the present invention is to provide a method for controlling a millimeter wave transceiver switch array, which can effectively increase the response speed of the millimeter wave transceiver switch array.
In order to solve the above technical problem, the present invention provides a millimeter wave transceiver switch array, which includes a transmitting switch array and a receiving switch array;
the receiving switch array at least comprises a primary receiving switch chip, a secondary receiving switch chip and a low-noise amplifier, wherein the secondary receiving switch chip comprises at least two input lines; the input circuits of the first-stage receiving switch chips and the second-stage receiving switch chips are in one-to-one correspondence, and any input circuit of the second-stage receiving switch chips is connected with one corresponding first-stage receiving switch chip; the low-noise amplifiers are in one-to-one correspondence with the input lines of all the secondary receiving switch chips, and any input line of the primary receiving switch chip is connected with one corresponding low-noise amplifier;
the low noise amplifiers connected with the corresponding input lines between the primary receiving switch chips are connected with a control power supply through the same control line, and at least one control line is connected with at least two low noise amplifiers;
the transmitting switch array comprises output circuits with preset paths; and the output lines of the transmitting switch array correspond to the input lines of all the low-noise amplifiers one to one.
Optionally, the first-stage receiving switch chip includes at least two input lines.
Optionally, the low noise amplifiers connected to the input lines with the same identification information between the first-stage receiving switch chips are connected to the control power supply by the same control line; any input line in the same primary receiving switch chip has the unique identification information.
Optionally, the receiving switch array further includes a third-stage receiving switch chip, where the third-stage receiving switch chip includes at least two input lines; the secondary receiving switch chips are in one-to-one correspondence with input lines of the tertiary receiving switch chips, and any input line of the tertiary receiving switch chip is connected with one corresponding secondary receiving switch chip.
Optionally, the transmission switch array at least includes a first-stage transmission switch chip and a second-stage transmission switch chip, and the second-stage transmission switch chip includes at least two output lines; the primary emission switch chip is in one-to-one correspondence with the output lines of the secondary emission switch chip, and any output line of the secondary emission switch chip is connected with a corresponding primary emission switch chip.
Optionally, the first-stage launch switch chip includes at least two output lines, the launch switch array further includes a plurality of one-to-one switch chips, one-to-one switch chip corresponds to all the output lines of the first-stage launch switch chip one-to-one, and any output line of the first-stage launch switch chip is connected with a corresponding one-to-one switch chip.
Optionally, the transmission switch array further includes a three-stage transmission switch chip, where the three-stage transmission switch chip includes at least two output lines; the output lines of the second-level transmitting switch chips correspond to the output lines of the third-level transmitting switch chips one by one, and any output line of the third-level transmitting switch chips is connected with one corresponding second-level transmitting switch chip.
Optionally, the first-stage receiving switch chip and the second-stage receiving switch chip are both connected to a TTL control power supply.
The invention also provides a control method of the millimeter wave transceiving switch array, which comprises the following steps:
sequentially sending control signals along a control line through a control power supply so as to start a low-noise amplifier connected with the control line; the millimeter wave receiving and transmitting switch array comprises a transmitting switch array and a receiving switch array; the receiving switch array at least comprises a primary receiving switch chip, a secondary receiving switch chip and a low-noise amplifier, wherein the secondary receiving switch chip comprises at least two input lines; the input circuits of the first-stage receiving switch chips and the second-stage receiving switch chips are in one-to-one correspondence, and any input circuit of the second-stage receiving switch chips is connected with one corresponding first-stage receiving switch chip; the low-noise amplifiers are in one-to-one correspondence with the input lines of all the secondary receiving switch chips, and any input line of the primary receiving switch chip is connected with one corresponding low-noise amplifier; the low noise amplifiers connected with the corresponding input lines between the primary receiving switch chips are connected with a control power supply through the same control line, and at least one control line is connected with at least two low noise amplifiers;
controlling a transmitting switch array to transmit a millimeter wave signal; the transmitting switch array comprises output circuits with preset paths; the output lines of the transmitting switch array correspond to the input lines of all the low-noise amplifiers one to one;
and after the control power supply signal is stable, controlling a primary receiving switch chip to be communicated with the started low-noise amplifier, and sequentially changing the communicated input lines through a secondary receiving switch chip so as to sequentially receive the millimeter wave signals sent by the transmitting switch array.
Optionally, the sending the control signal along the control line in sequence by controlling the power supply to turn on the low noise amplifier connected to the control line includes:
s1: sending a control signal along a target control line by a control power supply to turn on a low noise amplifier connected with the target control line;
s2: when the control power supply signal is stable, judging whether the target control line is a final control line; if not, taking a control line which does not send the control signal as a target control line according to a preset sequence, and executing the step S1; if yes, all the low noise amplifiers are closed when the receiving switch array finishes receiving all the millimeter wave signals sent by the transmitting switch array.
The invention provides a millimeter wave receiving and transmitting switch array, which comprises a transmitting switch array and a receiving switch array, wherein the receiving switch array at least comprises a primary receiving switch chip, a secondary receiving switch chip and a low-noise amplifier, and the secondary receiving switch chip comprises at least two input lines; the input circuits of the first-stage receiving switch chips and the second-stage receiving switch chips are in one-to-one correspondence, and any input circuit of the second-stage receiving switch chips is connected with one corresponding first-stage receiving switch chip; the low noise amplifiers are in one-to-one correspondence with the input lines of all the secondary receiving switch chips, and any input line of the primary receiving switch chip is connected with one corresponding low noise amplifier; the low noise amplifiers connected with the corresponding input lines between the first-stage receiving switch chips are connected with a control power supply through the same control line, and at least one control line is connected with at least two low noise amplifiers. In the use process, the time of dozens of microseconds is usually needed for controlling the stability of the power chip of the low-noise amplifier, but the control power supply can pre-start a plurality of low-noise amplifiers through only one control line, so that the time for stabilizing the power chip is saved, the quick response of the millimeter wave transceiver switch array is realized, and the scanning time of the millimeter security inspection system is further reduced.
The invention also provides a control method of the millimeter wave transceiving switch array, which has the beneficial effects and is not repeated herein.
Drawings
In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the description of the embodiments or the prior art 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 that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a millimeter wave transceiver switch array according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a specific receiving switch array according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a specific transmit switch array 1 according to an embodiment of the present invention;
fig. 4 is a flowchart of a method for controlling a millimeter wave transceiver switch array according to an embodiment of the present invention;
fig. 5 is a flowchart of a specific millimeter wave transceiving switch array control method according to an embodiment of the present invention.
In the figure: 1. the device comprises a transmitting switch array, 2 receiving switch arrays, 3 primary receiving switch chips, 4 secondary receiving switch chips, 5 low noise amplifiers, 6 control lines, 7 tertiary receiving switch chips, 8 primary transmitting switch chips, 9 secondary transmitting switch chips, 10 tertiary transmitting switch chips and 11 one-to-one switch chips.
Detailed Description
The core of the invention is to provide a millimeter wave transceiving switch array. In the prior art, when switching signal channels between millimeter wave transceiving switch arrays, the time used for switching the signal channels is usually the sum of the time for controlling the switch chips to switch the signal channels and the time for stabilizing the low-noise discharge source chip, and since the time for stabilizing the low-noise discharge source chip usually needs tens of microseconds, the time for controlling the switch chips to switch the signal channels is usually within 100 ns. Compared with the time for controlling the switching of the signal channel by the switch chip, the time for stabilizing the low-noise discharge source chip is longer, and the requirement of a millimeter wave security inspection system cannot be met.
The millimeter wave receiving and transmitting switch array comprises a transmitting switch array and a receiving switch array, wherein the receiving switch array at least comprises a primary receiving switch chip, a secondary receiving switch chip and a low-noise amplifier, and the secondary receiving switch chip comprises at least two input lines; the input circuits of the first-stage receiving switch chips and the second-stage receiving switch chips are in one-to-one correspondence, and any input circuit of the second-stage receiving switch chips is connected with one corresponding first-stage receiving switch chip; the low noise amplifiers are in one-to-one correspondence with the input lines of all the secondary receiving switch chips, and any input line of the primary receiving switch chip is connected with one corresponding low noise amplifier; the low noise amplifiers connected with the corresponding input lines between the first-stage receiving switch chips are connected with a control power supply through the same control line, and at least one control line is connected with at least two low noise amplifiers. In the use process, the time of dozens of microseconds is usually needed for controlling the stability of the power chip of the low-noise amplifier, but the control power supply can pre-start a plurality of low-noise amplifiers through only one control line, so that the time for stabilizing the power chip is saved, the quick response of the millimeter wave transceiver switch array is realized, and the scanning time of the millimeter security inspection system is further reduced.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope 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.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a millimeter wave transceiver switch array according to an embodiment of the present invention.
Referring to fig. 1, in the embodiment of the present invention, the millimeter wave transceiving switch array includes a transmitting switch array 1 and a receiving switch array 2; the receiving switch array 2 at least comprises a primary receiving switch chip 3, a secondary receiving switch chip 4 and a low noise amplifier 5, wherein the secondary receiving switch chip 4 comprises at least two input lines; the primary receiving switch chips 3 correspond to the input lines of the secondary receiving switch chips 4 one by one, and any input line of the secondary receiving switch chip 4 is connected with one corresponding primary receiving switch chip 3; the low noise amplifiers 5 correspond to all the input lines of the secondary receiving switch chips 4 one by one, and any input line of the primary receiving switch chip 3 is connected with one corresponding low noise amplifier 5; the low noise amplifiers 5 connected with the corresponding input lines between the primary receiving switch chips 3 are connected with a control power supply by the same control line 6, and at least one control line 6 is connected with at least two low noise amplifiers 5; the transmitting switch array 1 comprises output lines with preset paths; the output lines of the transmitting switch array 1 correspond to the input lines of all the low noise amplifiers 5 one by one.
The millimeter wave transceiving switch array comprises a transmitting switch array 1 and a receiving switch array 2, the generating switch array can transmit millimeter wave signals, and the corresponding receiving switch array 2 can receive the millimeter wave signals. The receiving switch array 2 at least comprises a primary receiving switch chip 3, a secondary receiving switch chip 4 and a low noise amplifier 5. Because the second-level receiving switch chip 4 comprises at least two input lines, the first-level receiving switch chip 3 corresponds to the input lines of the second-level receiving switch chip 4 one by one, and any input line of the second-level receiving switch chip 4 is connected with the corresponding first-level receiving switch chip 3, a signal receiving channel similar to a tree structure can be formed by the second-level receiving switch chip 4 and the plurality of first-level receiving switch chips 3. The low noise amplifiers 5 correspond to the input lines of all the secondary receiving switch chips 4 one by one, and any input line of the primary receiving switch chip 3 is connected with one corresponding low noise amplifier 5, so that the millimeter wave signals are firstly amplified by the low noise amplifiers 5 and then received along the signal receiving channel of the tree structure.
Specifically, the low noise amplifiers 5 connected to the corresponding input lines between the primary receiving switch chips 3 are connected to a control power supply through the same control line 6, and at least one control line 6 is connected to at least two of the low noise amplifiers 5. That is, in the embodiment of the present invention, the low noise amplifier 5 needs to be controlled to be turned on during use by a control power supply, which is usually a power supply chip, and when the low noise amplifier is turned on, the control power supply, i.e., the power supply chip needs a certain time to be stable, which is usually about tens of microseconds. Of course, each of the low noise amplifiers 5 described above needs to be connected to a control power supply through a control line 6.
In the present embodiment, the control power supply turns on the connected low noise amplifiers 5 through the control lines 6, while in the present embodiment at least one control line 6 connects at least two low noise amplifiers 5, i.e. at least two low noise amplifiers 5 are connected to the control power supply through the same control line 6. The low noise amplifiers 5 connected to the same connection line, that is, the low noise amplifiers 5 connected to the corresponding input lines between the plurality of primary reception switch chips 3, may be configured such that the plurality of primary reception switch chips 3 have only one input line and only one low noise amplifier 5 is connected thereto. At this time, among the plurality of primary reception switch chips 3, the low noise amplifier 5 to which at least two of the primary reception switch chips 3 are connected is connected to the control power supply through the same control line 6.
In general, the primary receiving switch chips 3 are also one-to-N switch chips, that is, the primary receiving switch chips 3 each generally include at least two input lines, each of the primary receiving switch chips 3 has a plurality of input lines, and the input line of each of the primary receiving switch chips 3 is connected to a low noise amplifier 5. At this time, the input lines of each of the first-stage receiving switch chips 3 have a label, i.e., identification information, and the low noise amplifiers 5 connected to the input lines of the same identification information are connected to the control power supply through the same control line 6, i.e., the low noise amplifiers 5 connected to the input lines of the same identification information between the first-stage receiving switch chips 3 are connected to the control power supply through the same control line 6. In general, in the embodiment of the present invention, any one of the input lines in the same one-stage receiving switch chip 3 has unique identification information, that is, the low noise amplifier 5 connected to the same one-stage receiving switch chip 3 is not connected to the same control line 6. Of course, in the embodiment of the present invention, the low noise amplifier 5 connected to the same stage of receiving switch chip 3 may be connected to the same control line 6, and at this time, the response speed of the millimeter wave transceiving switch array is still increased, but at the same time, the isolation between the signal input channels in the receiving switch array is reduced. Preferably, any input line in the same-stage receiving switch chip 3 has unique identification information, that is, the low-noise amplifier 5 connected with the same-stage receiving switch chip 3 is not connected with the same control line 6, so that the isolation between signal input channels in the receiving switch array is not reduced.
It should be noted that, in the embodiment of the present invention, each signal receiving channel in the receiving switch array 2 needs to be turned on by at least two stages of switches, that is, the first stage receiving switch chip 3 and the second stage receiving switch chip 4, so that the isolation between the signal receiving channels can be effectively increased by using the structure, and thus, the requirement of the system on the isolation between the channels is easily met.
The transmitting switch array 1 comprises output circuits with preset paths; the output lines of the transmit switch array 1 correspond to the input lines of all the low noise amplifiers 5 one to one, that is, the output lines of the transmit switch array 1 and the input lines of the receive switch array 2 generally need to correspond to one to ensure the reception of signals. It should be noted that the primary receiving switch chip 3 and the secondary receiving switch chip 4 are also generally required to be connected to a control power supply, so as to control the on/off of the input lines in the primary receiving switch chip 3 and the secondary receiving switch chip 4 by the control power supply; meanwhile, the transmitting switch array 1 also needs to be connected with a control power supply so as to control the opening of the output line in the transmitting switch array 1 through the control power supply.
Specifically, in the embodiment of the present invention, the primary receiving switch chip 3 and the secondary receiving switch chip 4 are both connected to a TTL control power supply. The TTL control power supply can send TTL control signals, and in the embodiment of the invention, the primary receiving switch chip 3 and the secondary receiving switch chip 4 can switch input lines through the TTL control signals.
The millimeter wave transceiving switch array provided by the embodiment of the invention comprises a transmitting switch array 1 and a receiving switch array 2, wherein the receiving switch array 2 at least comprises a primary receiving switch chip 3, a secondary receiving switch chip 4 and a low-noise amplifier 5, and the secondary receiving switch chip 4 comprises at least two input lines; the primary receiving switch chips 3 correspond to the input lines of the secondary receiving switch chips 4 one by one, and any input line of the secondary receiving switch chip 4 is connected with one corresponding primary receiving switch chip 3; the low-noise amplifiers 5 correspond to the input lines of all the secondary receiving switch chips 4 one by one, and any input line of the primary receiving switch chip 3 is connected with one corresponding low-noise amplifier 5; the low noise amplifiers 5 connected with the corresponding input lines between the primary receiving switch chips 3 are connected with a control power supply by the same control line 6, and at least one control line 6 is connected with at least two low noise amplifiers 5. In the use process, the time of dozens of microseconds is usually needed for controlling the stability of the power supply chip of the low-noise amplifier 5, but the control power supply can pre-start a plurality of low-noise amplifiers 5 only through one control line 6, so that the time for stabilizing the power supply chip is saved, the quick response of the millimeter wave receiving and transmitting switch array is realized, and the scanning time of the millimeter security inspection system is further reduced.
The specific structure of the millimeter wave transceiver switch array provided by the present invention will be described in detail in the following embodiments of the present invention.
Referring to fig. 2 and fig. 3, fig. 2 is a schematic structural diagram of a specific receiving switch array according to an embodiment of the present invention; fig. 3 is a schematic structural diagram of a specific transmit switch array 1 according to an embodiment of the present invention.
The present invention is different from the above-described embodiments, and the present invention further specifically limits the structure of the millimeter wave transceiving switch array on the basis of the above-described embodiments. The rest of the contents are already described in detail in the above embodiments of the present invention, and are not described herein again.
Referring to fig. 2 and fig. 3, in the embodiment of the present invention, the receiving switch array 2 further includes a three-stage receiving switch chip 7, where the three-stage receiving switch chip 7 includes at least two input lines; the secondary receiving switch chips 4 correspond to the input lines of the tertiary receiving switch chips 7 one by one, and any input line of the tertiary receiving switch chip 7 is connected with one corresponding secondary receiving switch chip 4.
That is, in the receiving switch array 2 provided in the embodiment of the present invention, three-level switches are included in total, and the three-level switches are respectively the first-level receiving switch chip 3, the second-level receiving switch chip 4, and the third-level receiving switch chip 7, because the third-level receiving switch chip 7 includes at least two input lines, the second-level receiving switch chip 4 corresponds to the input lines of the third-level receiving switch chip 7 one by one, and any input line of the third-level receiving switch chip 7 is connected to a corresponding second-level receiving switch chip 4, so that the first-level receiving switch chip 3, the second-level receiving switch chip 4, and the third-level receiving switch chip 7 together form a signal receiving channel with a tree structure, and any signal receiving channel in the receiving switch array 2 needs to pass through the first-level receiving switch chip 3, the second-level receiving switch chip 4.
In the embodiment of the present invention, the isolation between the signal receiving channels in the receiving switch array 2 can be further improved by providing the three-stage receiving switch chip 7. At present, the isolation degree of the channel can be increased by 25dB by arranging the primary switch, and at present, the isolation degree of about 50dB is generally required by the millimeter wave transceiving system. For the receiving switch array 2 provided by the embodiment of the invention, when the low noise amplifier 5 is powered off, the isolation degree of the receiving switch array is usually over 40dB, so that the requirement of a system can be met; when the preset low noise amplifier 5 works, for the signal receiving channels which are simultaneously opened, signals still need to pass through the input lines of different secondary receiving switch chips 4 and the input lines of different primary receiving switch chips 3 before the signals are converged by the tertiary receiving switch chip 7, so that the isolation of the signal receiving channels is about 50dB, and the system requirements are met; and between the signal receiving channels which are not opened simultaneously, signals need to pass through the three-stage switch in sequence, so that the isolation degree of the signal receiving channels is about 75dB, and the system requirements are met.
In the embodiment of the present invention, the transmission switch array 1 at least includes a first-stage transmission switch chip 8 and a second-stage transmission switch chip 9, and the second-stage transmission switch chip 9 includes at least two output lines; the primary emission switch chips 8 correspond to the output lines of the secondary emission switch chips 9 one by one, and any output line of the secondary emission switch chip 9 is connected with one corresponding primary emission switch chip 8.
Similar to the receiving switch array 2 described in the above embodiment of the invention, since the secondary transmitting switch chip 9 includes at least two output lines, the primary transmitting switch chips 8 correspond to the output lines of the secondary transmitting switch chips 9 one by one, and any output line of the secondary transmitting switch chip 9 is connected to a corresponding primary transmitting switch chip 8, the primary transmitting switch chip 8 and the secondary transmitting switch chip 9 can also form a signal transmitting channel with a similar tree structure. The signal transmitting channels of the tree structure have high isolation, and the isolation between the signal transmitting channels in the transmitting switch array 1 can be effectively increased through the primary transmitting switch chip 8 and the secondary transmitting switch chip 9.
Specifically, in the embodiment of the present invention, the transmission switch array 1 further includes a three-stage transmission switch chip 10, where the three-stage transmission switch chip 10 includes at least two output lines; the secondary emission switch chips 9 correspond to the output lines of the tertiary emission switch chips 10 one by one, and any output line of the tertiary emission switch chip 10 is connected with one corresponding secondary emission switch chip 9.
Similar to the receiving switch array 2 in the embodiment of the present invention, since the stage transmitting switch chip includes at least two output lines, the second stage transmitting switch chips 9 correspond to the output lines of the third stage transmitting switch chips 10 one by one, and any output line of the third stage transmitting switch chip 10 is connected to a corresponding second stage transmitting switch chip 9, a signal transmitting channel with a similar tree structure of a third stage switch can be formed by the first stage transmitting switch chip 8, the second stage transmitting switch chips 9 and the third stage transmitting switch chips 10, thereby further increasing the isolation between the signal transmitting channels in the transmitting switch array 1.
Specifically, in the embodiment of the present invention, the primary emission switch chip 8 includes at least two output lines, the emission switch array 1 further includes a plurality of one-to-one switch chips 11, the one-to-one switch chip 11 corresponds to all the output lines of the primary emission switch chip 8 one by one, and any output line of the primary emission switch chip 8 is connected to a corresponding one-to-one switch chip 11.
The primary transmitting switch chip 8 is a one-to-N switch chip, and generally includes at least two output lines, and the end of each output line is connected to one-to-one switch chip 11. In the using process, when any output line of the primary emission switch chip 8 is turned off, the corresponding one-to-one switch chip 11 also needs to be turned off. Compared with the case that the one-to-one switch chip 11 is not arranged, the one-to-one switch chip 11 can effectively reduce signal leakage and reduce the radiation of signals from the output line, thereby effectively increasing the isolation of signal transmitting channels.
According to the millimeter wave transceiving switch array provided by the embodiment of the invention, the isolation degree between signal receiving channels in the receiving switch array 2 can be effectively increased by arranging the three-stage receiving switch chip 7; by arranging the first-stage emission switch chip 8, the second-stage emission switch chip 9 and the third-stage emission switch chip 10 and arranging the one-to-one switch chip 11 at the tail end of the signal emission channel, the signal emission channels in the emission switch array 1 can have high isolation.
The following describes a control method of the millimeter wave transceiving switch array provided by the present invention, and the control method described below and the structure of the millimeter wave transceiving switch array described above may be referred to correspondingly.
Referring to fig. 4, fig. 4 is a flowchart of a method for controlling a millimeter wave transceiver switch array according to an embodiment of the present invention.
Referring to fig. 4, in the embodiment of the present invention, a method for controlling a millimeter wave transceiving switch array includes:
s101: and sequentially sending control signals along the control line by controlling the power supply so as to start the low-noise amplifier connected with the control line.
In the embodiment of the invention, the millimeter wave transceiving switch array comprises a transmitting switch array and a receiving switch array; the receiving switch array at least comprises a primary receiving switch chip, a secondary receiving switch chip and a low-noise amplifier, wherein the secondary receiving switch chip comprises at least two input lines; the input circuits of the first-stage receiving switch chips and the second-stage receiving switch chips are in one-to-one correspondence, and any input circuit of the second-stage receiving switch chips is connected with one corresponding first-stage receiving switch chip; the low-noise amplifiers are in one-to-one correspondence with the input lines of all the secondary receiving switch chips, and any input line of the primary receiving switch chip is connected with one corresponding low-noise amplifier; the low noise amplifiers connected with the corresponding input lines between the primary receiving switch chips are connected with a control power supply through the same control line, and at least one control line is connected with at least two low noise amplifiers. The specific structure of the receiving switch array has been described in detail in the above embodiments, and will not be described herein again.
Since at least one control line is connected with at least two low noise amplifiers, at least two low noise amplifiers can be simultaneously started through one control line in the step, and therefore the time for stabilizing the power supply chip is shortened. And the signal receiving channel where the turned-on low noise amplifier is located may be used to receive millimeter wave signals.
S102: and controlling the transmitting switch array to transmit the millimeter wave signal.
In the embodiment of the invention, the transmitting switch array comprises output lines with preset paths; and the output lines of the transmitting switch array correspond to the input lines of all the low-noise amplifiers one to one. The specific structure of the transmitting switch array has been described in detail in the above embodiments of the invention, and will not be described herein again.
In this step, the transmitting switch array is controlled to transmit the millimeter wave signal. Because the output lines of the transmitting switch array correspond to the input lines of the receiving switch array one by one, and the corresponding output lines and the corresponding input lines form a signal channel. And in S101, turning on the low noise amplifier means that the turned-on signal channel is already turned on, and in this step, the millimeter wave signals are sequentially transmitted in a preset order, usually in the turned-on signal channel.
S103: and after the control power supply signal is stable, controlling the primary receiving switch chip to be communicated with the started low-noise amplifier, and sequentially changing the communicated input lines through the secondary receiving switch chip so as to sequentially receive the millimeter wave signals sent by the transmitting switch array.
In this step, it is first necessary to wait for the control power supply signal to stabilize. After the control power supply signal is stable, the state of the low noise amplifier 5 is stable, at this time, the connection between the first-stage receiving switch chip and the turned-on low noise amplifier needs to be maintained, and then the connected input lines are sequentially changed through the second-stage receiving switch chip to complete the switching of the signal channels and sequentially receive the millimeter wave signals sent by the transmitting switch array. In the step, the circuits for communicating and inputting are sequentially changed through the first-stage receiving switch chip and the different second-stage receiving switch chips so as to sequentially receive the millimeter wave signals sent by the transmitting switch array. And after the receiving channels of all the opened low-noise amplifiers finish signal receiving, closing the control signals, and closing the corresponding low-noise amplifiers at the moment.
According to the control method of the millimeter wave transceiving switch array provided by the embodiment of the invention, the plurality of low-noise amplifiers can be turned on in advance through one control line, so that the time for stabilizing the power supply chip is saved, the quick response of the millimeter wave transceiving switch array is realized, and the scanning time of a millimeter security inspection system is further reduced.
The details of the millimeter wave transceiver switch array control method provided by the present invention will be described in detail in the following embodiments of the present invention.
Referring to fig. 5, fig. 5 is a flowchart illustrating a specific millimeter wave transceiver switch array control method according to an embodiment of the present invention.
Referring to fig. 5, in the embodiment of the present invention, a method for controlling a millimeter wave transceiving switch array includes:
s1: a control signal is sent along a target control line by a control power supply to turn on a low noise amplifier connected to the target control line.
In an embodiment of the present invention, an initial target control line is first determined. In this step, a control signal is sent along the target control line by the control power supply to turn on the low noise amplifier connected to the target control line. The rest of the steps are substantially similar to S101 in the above embodiment of the present invention, and the details have been described in detail in the above embodiment of the present invention, and are not described again here. In this step, the low noise amplifier connected to the target control line is turned on only by sending a control signal along the target control line.
S2: and when the control power supply signal is stable, judging whether the target control line is the final control line.
In this step, after the control power signal is stabilized, that is, after the low noise amplifier is stabilized, it is determined whether the current target control line is the final control line. The final control line, i.e. the last control line in the preset sequence, turns on all the signal receiving channels after the low noise amplifier is turned on through the final control line.
In this step, if the determination result is negative, which means that the corresponding low noise amplifier needs to be continuously turned on through a new control line according to the preset sequence, S203 needs to be executed; if the determination result is yes, which means that all the low noise amplifiers are turned on, S204 needs to be performed.
S203: and taking a control line which does not send the control signal as a target control line according to a preset sequence.
When this step is performed, it means that it is also necessary to continue to turn on the corresponding low noise amplifiers through the new control lines in the preset order. In this step, a control line not transmitting the control signal is used as a target control line in a predetermined sequence, and S1 is executed to perform a loop, thereby turning on the next part of the low noise amplifiers through a new target control line.
S204: and when the receiving switch array receives all the millimeter wave signals sent by the transmitting switch array, all the low-noise amplifiers are closed.
When the step is executed, it means that all the low noise amplifiers are already turned on, and when the receiving switch array has received all the millimeter wave signals sent by the transmitting switch array, all the low noise amplifiers are turned off to disconnect all the signal channels.
S205: and controlling the transmitting switch array to transmit the millimeter wave signal.
This step generally needs to be performed after S1, but in the embodiment of the present invention, this step generally needs to be performed in parallel with S2, and this step generally needs to control the transmitting switch array to transmit the millimeter wave signal after the control power signal is stabilized. The rest of the content of this step is substantially the same as S102 in the above embodiment of the present invention, and for the detailed content, reference is made to the above embodiment of the present invention, which is not described herein again.
S206: and after the control power supply signal is stable, controlling the primary receiving switch chip to be communicated with the started low-noise amplifier, and sequentially changing the communicated input lines through the secondary receiving switch chip so as to sequentially receive the millimeter wave signals sent by the transmitting switch array.
It should be noted that since this step is the same as the trigger condition of S2, the corresponding step is executed in parallel with S2. The time for controlling the power supply signal to be stable at the present stage is usually about tens of microseconds, while the time for controlling the switching of the switch chip is actually in the nanosecond level, which is far shorter than the time for controlling the power supply signal to be stable. Therefore, in the embodiment of the present invention, after the low noise amplifier connected to a certain control line is turned on and the control power signal is stabilized, the low noise amplifier connected to the next control line may be turned on, and when the control power signal connected to the low noise amplifier connected to the next control line is stabilized, the switching of different input lines in the secondary receiving switch chip is completed, that is, the receiving and sending of the millimeter wave signal are completed. Of course, after completing the transceiving of a group of millimeter wave signals, it is necessary to turn off the low noise amplifier in the signal path that has been used.
According to the control method of the millimeter wave transceiving switch array provided by the embodiment of the invention, the millimeter wave signal is transmitted and received when the control power supply signal connected with the low noise amplifier connected with the next control line is stable, so that the response time of the millimeter wave transceiving switch array can be further reduced.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The millimeter wave transceiving switch array and the control method of the millimeter wave transceiving switch array provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. A millimeter wave receiving and dispatching switch array is characterized by comprising a transmitting switch array and a receiving switch array;
the receiving switch array at least comprises a primary receiving switch chip, a secondary receiving switch chip and a low-noise amplifier, wherein the secondary receiving switch chip comprises at least two input lines; the input circuits of the first-stage receiving switch chips and the second-stage receiving switch chips are in one-to-one correspondence, and any input circuit of the second-stage receiving switch chips is connected with one corresponding first-stage receiving switch chip; the low-noise amplifiers are in one-to-one correspondence with the input lines of all the secondary receiving switch chips, and any input line of the primary receiving switch chip is connected with one corresponding low-noise amplifier;
the low noise amplifiers connected with the corresponding input lines between the primary receiving switch chips are connected with a control power supply through the same control line, and at least one control line is connected with at least two low noise amplifiers;
the transmitting switch array comprises output circuits with preset paths; and the output lines of the transmitting switch array correspond to the input lines of all the low-noise amplifiers one to one.
2. The millimeter wave transceiving switch array of claim 1, wherein the primary receive switch chip comprises at least two input lines.
3. The millimeter wave transceiving switch array of claim 2, wherein the low noise amplifiers connected to the input lines having the same identification information between the primary receiving switch chips are connected to a control power supply by the same control line; any input line in the same primary receiving switch chip has the unique identification information.
4. The millimeter wave transceiving switch array of claim 3, wherein the receive switch array further comprises a tertiary receive switch chip, the tertiary receive switch chip comprising at least two input lines; the secondary receiving switch chips are in one-to-one correspondence with input lines of the tertiary receiving switch chips, and any input line of the tertiary receiving switch chip is connected with one corresponding secondary receiving switch chip.
5. The millimeter wave transceiving switch array of claim 1, wherein the transmit switch array comprises at least a primary transmit switch chip and a secondary transmit switch chip, the secondary transmit switch chip comprising at least two output lines; the primary emission switch chip is in one-to-one correspondence with the output lines of the secondary emission switch chip, and any output line of the secondary emission switch chip is connected with a corresponding primary emission switch chip.
6. The millimeter wave transceiving switch array of claim 5, wherein the primary transmit switch chip comprises at least two output lines, the transmit switch array further comprises a plurality of one-to-one switch chips, the one-to-one switch chips correspond to all the output lines of the primary transmit switch chip one to one, and any output line of the primary transmit switch chip is connected to a corresponding one-to-one switch chip.
7. The millimeter wave transceiving switch array of claim 5, wherein the transmit switch array further comprises a tertiary transmit switch chip, the tertiary transmit switch chip comprising at least two output lines; the output lines of the second-level transmitting switch chips correspond to the output lines of the third-level transmitting switch chips one by one, and any output line of the third-level transmitting switch chips is connected with one corresponding second-level transmitting switch chip.
8. The millimeter wave transceiving switch array of claim 1, wherein the primary receive switch chip and the secondary receive switch chip are both connected to a TTL control power supply.
9. A control method of a millimeter wave transceiving switch array is characterized by comprising the following steps:
sequentially sending control signals along a control line through a control power supply so as to start a low-noise amplifier connected with the control line; the millimeter wave receiving and transmitting switch array comprises a transmitting switch array and a receiving switch array; the receiving switch array at least comprises a primary receiving switch chip, a secondary receiving switch chip and a low-noise amplifier, wherein the secondary receiving switch chip comprises at least two input lines; the input circuits of the first-stage receiving switch chips and the second-stage receiving switch chips are in one-to-one correspondence, and any input circuit of the second-stage receiving switch chips is connected with one corresponding first-stage receiving switch chip; the low-noise amplifiers are in one-to-one correspondence with the input lines of all the secondary receiving switch chips, and any input line of the primary receiving switch chip is connected with one corresponding low-noise amplifier; the low noise amplifiers connected with the corresponding input lines between the primary receiving switch chips are connected with a control power supply through the same control line, and at least one control line is connected with at least two low noise amplifiers;
controlling a transmitting switch array to transmit a millimeter wave signal; the transmitting switch array comprises output circuits with preset paths; the output lines of the transmitting switch array correspond to the input lines of all the low-noise amplifiers one to one;
and after the control power supply signal is stable, controlling a primary receiving switch chip to be communicated with the started low-noise amplifier, and sequentially changing the communicated input lines through a secondary receiving switch chip so as to sequentially receive the millimeter wave signals sent by the transmitting switch array.
10. The method of claim 9, wherein the sending control signals along a control line in sequence by controlling a power supply to turn on a low noise amplifier connected to the control line comprises:
s1: sending a control signal along a target control line by a control power supply to turn on a low noise amplifier connected with the target control line;
s2: when the control power supply signal is stable, judging whether the target control line is a final control line; if not, taking a control line which does not send the control signal as a target control line according to a preset sequence, and executing the step S1; if yes, all the low noise amplifiers are closed when the receiving switch array finishes receiving all the millimeter wave signals sent by the transmitting switch array.
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