CN215813026U - Broadband instantaneous frequency measuring device - Google Patents
Broadband instantaneous frequency measuring device Download PDFInfo
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- CN215813026U CN215813026U CN202121951232.7U CN202121951232U CN215813026U CN 215813026 U CN215813026 U CN 215813026U CN 202121951232 U CN202121951232 U CN 202121951232U CN 215813026 U CN215813026 U CN 215813026U
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Abstract
The utility model discloses a broadband instantaneous frequency measurement device, which belongs to the technical field of signal detection, and comprises a front-end amplification module, a coupling circuit module, a detection circuit module, a control circuit module and a switch circuit module; the control circuit module comprises a direct current signal-to-frequency measurement signal submodule and a frequency measurement signal-to-control signal submodule; the broadband instantaneous frequency measurement device solves the problems that signal detection response time is slow and input signal information needs to be known in advance, has response speed within hundred ns magnitude, can realize automatic detection of signals and automatically turn on and turn off a switch, and can also obtain required pulse modulation signals through an external pulse control switch to realize automatic detection of the signals and automatically turn on and turn off the switch.
Description
Technical Field
The utility model belongs to the technical field of signal detection, and particularly relates to a broadband instantaneous frequency measurement device.
Background
With the continuous development of electromagnetic countermeasure and radar technology, radar signals are gradually developed to complex waveforms such as broadband linear frequency modulation signals, frequency agile signals, frequency hopping signals and the like from the traditional continuous wave and single pulse forms; in this context, the detection and processing time of the signal is particularly important. Most of the traditional signal detection technologies realize the signal on-off and detection functions by switching a channel switch through a single chip microcomputer, and the method has the defects of slow response time, need to know input signal information in advance and the like, which is particularly disadvantageous in the current radar technology.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the broadband instantaneous frequency measurement device provided by the utility model solves the problems that the signal detection response time is slow and the input signal information needs to be known in advance.
In order to achieve the purpose of the utility model, the utility model adopts the technical scheme that:
the scheme provides a broadband instantaneous frequency measurement device which comprises a front-end amplification module, a coupling circuit module, a detection circuit module, a control circuit module and a switch circuit module; the control circuit module comprises a direct current signal-to-frequency measurement signal submodule and a frequency measurement signal-to-control signal submodule;
the signal input end of the front-end amplification module is used as the radio-frequency signal input end of the broadband instantaneous frequency measurement device; the amplified signal output end of the front-end amplification module is connected with the amplified signal input end of the coupling circuit module; the first coupling signal output end and the second coupling signal output end of the coupling circuit module are respectively connected with the coupling signal input end of the switch circuit module and the coupling signal input end of the detection circuit module in a one-to-one correspondence manner; the direct-current signal output end of the detection circuit module is connected with the direct-current signal input end of the direct-current signal to frequency measurement signal submodule; the frequency measurement signal output end of the direct current signal-to-frequency measurement signal submodule is connected with the frequency measurement signal input end of the frequency measurement signal-to-control signal submodule; the control signal output end of the frequency measurement signal-to-control signal sub-module is connected with the control signal input end of the switch circuit module; the frequency measurement signal input end of the frequency measurement signal-to-control signal sub-module is used as an external control signal input end when being connected with expandable external pulses; and the output end of the switch circuit module is used as a frequency measurement signal output end of the broadband instantaneous frequency measurement device.
The utility model has the beneficial effects that: the broadband instantaneous frequency measurement device has ns-magnitude response speed, can realize automatic detection of signals and automatically turn on and turn off the switch through the broadband instantaneous frequency measurement device provided by the scheme, and can also obtain required pulse modulation signals through an external pulse control switch to realize automatic detection of the signals and automatically turn on and turn off the switch; the front-end amplification module realizes the receiving and amplification of large dynamic signals, the coupling circuit module has the characteristics of good directivity, small in-band fluctuation, low direct-connection loss and high coupling degree, the detection circuit module has the characteristics of large working bandwidth, good detection flatness and high rising edge speed, the control circuit module realizes that the switch is in a closed state when useless signals are input, and the switch circuit module has the characteristics of small loss, high isolation degree and high switching time, so that the switch can be used as a modulator to generate pulse signals.
Further, the front-end amplification module comprises a pad CT1, a capacitor C3, a filter chip F1, a capacitor C4, a radio frequency amplification chip U1, an inductor L1, a ground capacitor C2, a ground capacitor C1, a resistor R1, an application pad S1, a capacitor C5 and a pad CT 2;
one end of the pad CT1 is a signal input end of the front-end amplification module and is also used as a radio-frequency signal input end of the broadband instantaneous frequency measurement device; the other end of the pad CT1 is connected with one end of a capacitor C3; the other end of the capacitor C3 is connected with the 1 st pin of the filter chip F1; the No. 2 pin and the No. 3 pin of the filter chip F1 are connected and grounded; the 4 th pin of the filter chip F1 is connected with one end of a capacitor C4; the other end of the capacitor C4 is connected with the 1 st pin of the radio frequency amplification chip U1; the No. 2 pin and the No. 3 pin of the radio frequency amplification chip are respectively grounded; the 4 th pin of the radio frequency amplification chip is respectively connected with one end of an inductor L1 and one end of a capacitor C5; the other end of the inductor L1 is respectively connected with one end of a grounding capacitor C2, a grounding capacitor C1 and a resistor R1; the other end of the resistor R1 is connected with an application bonding pad S1; the other end of the capacitor C5 is connected with one end of a pad CT 2; the other end of the pad CT2 is used as an amplified signal output end of the front-end amplification module and is connected with the coupling circuit module.
The beneficial effect of adopting the further scheme is as follows: the front-end amplification module carries out filtering amplification processing on the received signals, has the characteristics of low noise and good linearity, and can realize receiving amplification on large dynamic signals.
Furthermore, the coupling circuit module comprises a dielectric slab body, a front side strip line arranged on the front side of the dielectric slab body, a back side strip line arranged on the back side of the dielectric slab body, a grounding resistor R12 and six screw fixing reserved holes arranged on the dielectric slab body;
the front stripline is positioned at one end of the left side of the front of the dielectric slab body, is an amplified signal input end of the coupling circuit module and is connected with the other end of the pad CT 2; one end of the front stripline, which is positioned on the right side of the front of the dielectric slab body, is a first coupling signal output end of the coupling circuit module and is connected with the switch circuit module; the front side strip line and the back side strip line are connected through radiation; one end of the back strip line, which is positioned at the left lower side of the back of the dielectric slab body, is a second coupling signal output end and is connected with the detection circuit module; and one end of the back stripline, which is positioned at the right lower side of the back of the dielectric slab body, is a load end of the coupling circuit module and is connected with a grounding resistor R12.
The beneficial effect of adopting the further scheme is as follows: the coupling circuit module couples and outputs the signals subjected to front-end amplification, and in order to ensure that the power of the coupled signals is large enough, the design of a coupling part is realized by adopting a strip line mode, so that the coupling circuit module has the characteristics of good directivity, small in-band fluctuation, low through loss and high coupling degree.
Further, the detection circuit module comprises a bonding pad S2, a grounding resistor R2, a capacitor C6, a chip U2 with the model number AD8317, a capacitor C7, a resistor R3, a bonding pad S3, a grounding resistor R4, a grounding capacitor C9, a grounding capacitor C10, a bonding pad S4 and a grounding capacitor C8;
the 0 th pin of the chip U2 is grounded; the 1 st pin of the chip U2 is connected with one end of a capacitor C6; the other end of the capacitor C6 is respectively connected with one end of a grounding resistor R2 and one end of a bonding pad S2; the other end of the bonding pad S2 is used as a second coupling signal input end of the detection circuit and is connected with one end of the back strip line positioned at the left lower side of the back of the dielectric slab body; the 2 nd pin of the chip U2 is connected with one end of a capacitor C7 and is grounded; the 3 rd pin of the chip U2 is connected with the other end of the capacitor C7; the 4 th pin of the chip U2 is connected with one end of a resistor R3; the 5 th pin of the chip U2 is respectively connected with the other end of the resistor R3 and one end of the bonding pad S3; the other end of the bonding pad S3 is used as a direct current signal output end of the detection circuit module and is connected with the direct current signal to frequency measurement signal sub-module; the 6 th pin of the chip U2 is connected with a grounding resistor R4; the 7 th pin of the chip U2 is respectively connected with a grounding capacitor C9, a grounding capacitor C10 and a bonding pad S4, and the bonding pad S4 is externally connected with a +5V power supply; the 8 th pin of the chip U2 is connected with a grounding capacitor C8.
The beneficial effect of adopting the further scheme is as follows: the detection circuit module has the characteristics of large working bandwidth, good detection flatness and fast rising edge, so that when a pulse signal is input, the instantaneous frequency measurement device provided by the scheme has fast response time.
Further, the direct current signal to frequency measurement signal sub-module comprises a pad K1, a resistor R5, a chip U3, a grounding capacitor C11, a resistor R6, a grounding resistor R7, a resistor R8 and a pad D1;
one end of the bonding pad K1 is used as a direct-current signal input end of the direct-current signal to frequency measurement signal sub-module, and the other end of the bonding pad S3 is connected; the other end of the bonding pad K1 is connected with one end of a resistor R5; the other end of the resistor R5 is connected with the 3 rd pin of the chip U3; the 1 st pin of the chip U3 is respectively connected with one end of a resistor R6 and a grounding capacitor C11 and is externally connected with a power supply VCC; the other end of the resistor R6 is respectively connected with the No. 2 pin of the chip U3 and a grounding resistor R7; the 4 th pin of the chip U3 is grounded; the 5 th pin of the chip U3 is connected with the 6 th pin thereof and is grounded; the 7 th pin of the chip U3 is connected with one end of a resistor R8; the other end of the resistor R8 is connected with one end of a bonding pad D1; the other end of the bonding pad D1 is used as a frequency measurement signal output end of the direct current signal-to-frequency measurement signal submodule and is connected with the frequency measurement signal-to-control signal submodule.
The beneficial effect of adopting the further scheme is as follows: and the direct current signal to frequency measurement signal conversion submodule amplifies a direct current signal obtained by the detection circuit to obtain a frequency measurement signal, and inputs the frequency measurement signal into the frequency measurement signal to control signal conversion submodule.
Further, the frequency measurement signal-to-control signal submodule comprises a pad CT3, a resistor R9, a chip U4, a grounded capacitor C13, a grounded capacitor C12, a pad CT5, a grounded capacitor C14, a grounded capacitor C15, a grounded capacitor C16, a resistor R10, a grounded capacitor C17, a pad CT4 and a pad CT 6;
one end of the bonding pad CT3 is used as a frequency measurement signal input end of the frequency measurement signal-to-control signal submodule and is connected with the other end of the bonding pad D1; the other end of the pad CT3 is connected with one end of a resistor R9; the other end of the resistor R9 is connected with the No. 2 pin of the chip U4; the 1 st pin of the chip U4 is grounded; the 3 rd pin of the chip U4 is respectively connected with a grounding capacitor C13, a grounding capacitor C12 and a bonding pad CT 5; the pad CT5 is externally connected with a-5V power supply; the 6 th pin of the chip U4 is respectively connected with a grounding capacitor C15, a grounding capacitor C16 and a bonding pad CT 6; the pad CT6 is externally connected with a +5V power supply; the 7 th pin of the chip U4 is connected with one end of a resistor R10; the other end of the resistor R10 is respectively connected with one end of a bonding pad CT4 and a grounding capacitor C17; the other end of the pad CT4 is used as a control signal output end of a frequency measurement signal-to-control signal conversion submodule and is connected with the switch circuit module; and the 8 th pin of the chip U4 is connected with a grounding capacitor C14 and is externally connected with a power supply VCC.
The beneficial effect of adopting the further scheme is as follows: the frequency measurement signal-to-control signal submodule obtains a group of control levels from a frequency measurement signal through a comparator, and then the control levels, namely control signals, are fed back to the control signal input end of the switch circuit, so that the switch is in a closed state when useless signals are input, when the broadband instantaneous frequency measurement device provided by the scheme works, after the out-of-band useless signals enter the switch circuit module, the switch circuit module is in the closed state, and because the useless signals are small, the power entering the coupling circuit module and the direct-current voltage detected by the detection circuit module are small, the control voltage of the control circuit cannot be driven to overturn, and therefore the switch is always in the closed state.
Further, the switch circuit module comprises a pad CT7, a capacitor C18, an inductor L2, a ground resistor R11, a Pin switch chip U5, a diode D1, a diode D2, an inductor L3, a ground capacitor C20, a capacitor C19 and a pad CT 8;
one end of the pad CT7 is used as a first coupling signal input end of the switch circuit module and is connected with one end of the front strip line positioned on the right side of the front of the dielectric slab body; the other end of the pad CT7 is connected with one end of a capacitor C18; the other end of the capacitor C18 is respectively connected with the inductor L2 and the 1 st Pin of the Pin switch chip U5; the other end of the inductor L2 is connected with a grounding resistor R11; the 2 nd Pin of the Pin switch chip U5 is respectively connected with the anode of the diode D1, the anode of the diode D2, one end of the inductor L3 and one end of the capacitor C19; the cathodes of the diode D1 and the diode D2 are both grounded; the other end of the inductor L3 is connected with a grounding capacitor C20 and is connected with the other end of the pad CT4 as a control signal input end of the switch circuit module; the other end of the capacitor C19 is connected with one end of a pad CT 8; the other end of the pad CT8 is used as the output end of the switch circuit module and is also used as the frequency measurement signal output end of the broadband instantaneous frequency measurement device.
The beneficial effect of adopting the further scheme is as follows: the switch circuit module realizes the on-off function of signals and has the characteristics of small loss, high isolation and quick switching time, so that the switch can be used as a modulator to generate pulse signals.
Drawings
Fig. 1 is a block diagram of a wideband instantaneous frequency measurement device according to an embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of a front-end amplifier module according to an embodiment of the present invention.
Fig. 3 is a circuit simulation diagram of a coupling circuit module according to an embodiment of the present invention.
Fig. 4 is a schematic circuit diagram of a sword wave circuit module according to an embodiment of the present invention.
Fig. 5 is a schematic circuit diagram of a dc signal to frequency measurement signal submodule according to an embodiment of the present invention.
Fig. 6 is a schematic circuit diagram of a frequency measurement signal to control signal submodule according to an embodiment of the present invention.
Fig. 7 is a schematic circuit diagram of a switching circuit module according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the utility model as defined and defined in the appended claims, and all matters produced by the utility model using the inventive concept are protected.
As shown in fig. 1, in an embodiment of the present invention, the present solution provides a wideband instantaneous frequency measurement device, which includes a front-end amplification module, a coupling circuit module, a detection circuit module, a control circuit module, and a switch circuit module; the control circuit module comprises a direct current signal-to-frequency measurement signal submodule and a frequency measurement signal-to-control signal submodule;
the signal input end of the front-end amplification module is used as the radio-frequency signal input end of the broadband instantaneous frequency measurement device; the amplified signal output end of the front-end amplification module is connected with the amplified signal input end of the coupling circuit module; the first coupling signal output end and the second coupling signal output end of the coupling circuit module are respectively connected with the coupling signal input end of the switch circuit module and the coupling signal input end of the detection circuit module in a one-to-one correspondence manner; the direct-current signal output end of the detection circuit module is connected with the direct-current signal input end of the direct-current signal to frequency measurement signal submodule; the frequency measurement signal output end of the direct current signal-to-frequency measurement signal submodule is connected with the frequency measurement signal input end of the frequency measurement signal-to-control signal submodule; the control signal output end of the frequency measurement signal-to-control signal sub-module is connected with the control signal input end of the switch circuit module; the frequency measurement signal input end of the frequency measurement signal-to-control signal sub-module is used as an external control signal input end when being connected with expandable external pulses; and the output end of the switch circuit module is used as a frequency measurement signal output end of the broadband instantaneous frequency measurement device.
As shown in fig. 2, the front-end amplification module includes a pad CT1, a capacitor C3, a filter chip F1, a capacitor C4, a radio frequency amplification chip U1, an inductor L1, a ground capacitor C2, a ground capacitor C1, a resistor R1, an application pad S1, a capacitor C5, and a pad CT 2;
one end of the pad CT1 is a signal input end of the front-end amplification module and is also used as a radio-frequency signal input end of the broadband instantaneous frequency measurement device; the other end of the pad CT1 is connected with one end of a capacitor C3; the other end of the capacitor C3 is connected with the 1 st pin of the filter chip F1; the No. 2 pin and the No. 3 pin of the filter chip F1 are connected and grounded; the 4 th pin of the filter chip F1 is connected with one end of a capacitor C4; the other end of the capacitor C4 is connected with the 1 st pin of the radio frequency amplification chip U1; the No. 2 pin and the No. 3 pin of the radio frequency amplification chip are respectively grounded; the 4 th pin of the radio frequency amplification chip is respectively connected with one end of an inductor L1 and one end of a capacitor C5; the other end of the inductor L1 is respectively connected with one end of a grounding capacitor C2, a grounding capacitor C1 and a resistor R1; the other end of the resistor R1 is connected with an application bonding pad S1; the other end of the capacitor C5 is connected with one end of a pad CT 2; the other end of the pad CT2 is used as an amplified signal output end of the front-end amplification module and is connected with the coupling circuit module.
As shown in fig. 3, the coupling circuit module includes a dielectric board body, a front stripline disposed on the front side of the dielectric board body, a back stripline disposed on the back side of the dielectric board body, a ground resistor R12, and six screw fixing reserved holes disposed on the dielectric board body;
the front stripline is positioned at one end of the left side of the front of the dielectric slab body, is an amplified signal input end of the coupling circuit module and is connected with the other end of the pad CT 2; one end of the front stripline, which is positioned on the right side of the front of the dielectric slab body, is a first coupling signal output end of the coupling circuit module and is connected with the switch circuit module; the front side strip line and the back side strip line are connected through radiation; one end of the back strip line, which is positioned at the left lower side of the back of the dielectric slab body, is a second coupling signal output end and is connected with the detection circuit module; and one end of the back stripline, which is positioned at the right lower side of the back of the dielectric slab body, is a load end of the coupling circuit module and is connected with a grounding resistor R12.
As shown in fig. 4, the detector circuit module includes a pad S2, a ground resistor R2, a capacitor C6, a chip U2 with a model AD8317, a capacitor C7, a resistor R3, a pad S3, a ground resistor R4, a ground capacitor C9, a ground capacitor C10, a pad S4, and a ground capacitor C8;
the 0 th pin of the chip U2 is grounded; the 1 st pin of the chip U2 is connected with one end of a capacitor C6; the other end of the capacitor C6 is respectively connected with one end of a grounding resistor R2 and one end of a bonding pad S2; the other end of the bonding pad S2 is used as a second coupling signal input end of the detection circuit and is connected with one end of the back strip line positioned at the left lower side of the back of the dielectric slab body; the 2 nd pin of the chip U2 is connected with one end of a capacitor C7 and is grounded; the 3 rd pin of the chip U2 is connected with the other end of the capacitor C7; the 4 th pin of the chip U2 is connected with one end of a resistor R3; the 5 th pin of the chip U2 is respectively connected with the other end of the resistor R3 and one end of the bonding pad S3; the other end of the bonding pad S3 is used as a direct current signal output end of the detection circuit module and is connected with the direct current signal to frequency measurement signal sub-module; the 6 th pin of the chip U2 is connected with a grounding resistor R4; the 7 th pin of the chip U2 is respectively connected with a grounding capacitor C9, a grounding capacitor C10 and a bonding pad S4, and the bonding pad S4 is externally connected with a +5V power supply; the 8 th pin of the chip U2 is connected with a grounding capacitor C8.
As shown in fig. 5, the dc signal to frequency measurement signal sub-module includes a pad K1, a resistor R5, a chip U3, a ground capacitor C11, a resistor R6, a ground resistor R7, a resistor R8, and a pad D1;
one end of the bonding pad K1 is used as a direct-current signal input end of the direct-current signal to frequency measurement signal sub-module, and the other end of the bonding pad S3 is connected; the other end of the bonding pad K1 is connected with one end of a resistor R5; the other end of the resistor R5 is connected with the 3 rd pin of the chip U3; the 1 st pin of the chip U3 is respectively connected with one end of a resistor R6 and a grounding capacitor C11 and is externally connected with a power supply VCC; the other end of the resistor R6 is respectively connected with the No. 2 pin of the chip U3 and a grounding resistor R7; the 4 th pin of the chip U3 is grounded; the 5 th pin of the chip U3 is connected with the 6 th pin thereof and is grounded; the 7 th pin of the chip U3 is connected with one end of a resistor R8; the other end of the resistor R8 is connected with one end of a bonding pad D1; the other end of the bonding pad D1 is used as a frequency measurement signal output end of the direct current signal-to-frequency measurement signal submodule and is connected with the frequency measurement signal-to-control signal submodule.
As shown in fig. 6, the frequency measurement signal-to-control signal submodule includes a pad CT3, a resistor R9, a chip U4, a ground capacitor C13, a ground capacitor C12, a pad CT5, a ground capacitor C14, a ground capacitor C15, a ground capacitor C16, a resistor R10, a ground capacitor C17, a pad CT4, and a pad CT 6;
one end of the bonding pad CT3 is used as a frequency measurement signal input end of the frequency measurement signal-to-control signal submodule and is connected with the other end of the bonding pad D1; the other end of the pad CT3 is connected with one end of a resistor R9; the other end of the resistor R9 is connected with the No. 2 pin of the chip U4; the 1 st pin of the chip U4 is grounded; the 3 rd pin of the chip U4 is respectively connected with a grounding capacitor C13, a grounding capacitor C12 and a bonding pad CT 5; the pad CT5 is externally connected with a-5V power supply; the 6 th pin of the chip U4 is respectively connected with a grounding capacitor C15, a grounding capacitor C16 and a bonding pad CT 6; the pad CT6 is externally connected with a +5V power supply; the 7 th pin of the chip U4 is connected with one end of a resistor R10; the other end of the resistor R10 is respectively connected with one end of a bonding pad CT4 and a grounding capacitor C17; the other end of the pad CT4 is used as a control signal output end of a frequency measurement signal-to-control signal conversion submodule and is connected with the switch circuit module; and the 8 th pin of the chip U4 is connected with a grounding capacitor C14 and is externally connected with a power supply VCC.
As shown in fig. 7, the switch circuit module includes a pad CT7, a capacitor C18, an inductor L2, a ground resistor R11, a Pin switch chip U5, a diode D1, a diode D2, an inductor L3, a ground capacitor C20, a capacitor C19 and a pad CT 8;
one end of the pad CT7 is used as a first coupling signal input end of the switch circuit module and is connected with one end of the front strip line positioned on the right side of the front of the dielectric slab body; the other end of the pad CT7 is connected with one end of a capacitor C18; the other end of the capacitor C18 is respectively connected with the inductor L2 and the 1 st Pin of the Pin switch chip U5; the other end of the inductor L2 is connected with a grounding resistor R11; the 2 nd Pin of the Pin switch chip U5 is respectively connected with the anode of the diode D1, the anode of the diode D2, one end of the inductor L3 and one end of the capacitor C19; the cathodes of the diode D1 and the diode D2 are both grounded; the other end of the inductor L3 is connected with a grounding capacitor C20 and is connected with the other end of the pad CT4 as a control signal input end of the switch circuit module; the other end of the capacitor C19 is connected with one end of a pad CT 8; the other end of the pad CT8 is used as the output end of the switch circuit module and is also used as the frequency measurement signal output end of the broadband instantaneous frequency measurement device.
The working principle of the utility model is as follows: the front-end amplification module receives the radio-frequency signal, performs filtering amplification processing on the radio-frequency signal and inputs the amplified signal to the coupling circuit module; the coupling circuit module couples the signals processed by the front-end amplification module and then outputs a first coupling signal and a second coupling signal to the switch circuit module and the detection circuit module respectively; the detection circuit module carries out detection processing on the second coupling signal to obtain a direct current signal and outputs the direct current signal to the control circuit module; the control circuit module comprises a direct current signal to frequency measurement signal submodule and a frequency measurement signal to control signal submodule, the direct current signal to frequency measurement signal submodule amplifies a direct current signal output by the detection circuit module to obtain a frequency measurement signal, and the frequency measurement signal is output to the frequency measurement signal to control signal submodule; the frequency measurement signal-to-control signal submodule obtains a group of control levels, namely control signals, from the frequency measurement signals through a comparator, and then feeds the control signals back to the control signal input end of the switch circuit module; the switching circuit receives the first coupling signal and the control signal to realize the on-off of the signal, can be used as a modulator and generates a pulse signal; when the broadband instantaneous frequency measurement device provided by the scheme enters the switch after the out-of-band useless signals enter the switch, the switch is in a closed state, and the power entering the coupling circuit module and the direct-current voltage detected by the detection circuit module are small due to the small useless signals, so that the control voltage of the control circuit module cannot be driven to turn over, and the switch is always in the closed state; when a useful continuous wave signal is input, the amplified signal is coupled by the coupling circuit module and then enters the detection circuit to obtain a comparison voltage which can drive the control voltage of the control circuit to overturn, so that the switch is in a starting state to complete the continuous wave signal detection function, the response time of the whole process is controlled below hundred nanoseconds, and the ultrahigh-speed response time is realized; when a pulse signal is input, the amplified signal enters the detection circuit after being coupled by the coupling circuit module to obtain a detection signal synchronously switched along with the period of the pulse signal, the high level of the detection signal can drive the control voltage of the control circuit to turn, and the low level can not drive the control voltage of the control circuit to turn; the switch circuit module is also in a modulation state with the same period as the pulse signal, so that the pulse signal detection is realized; in addition, when the external expandable pulse signal is input from the frequency measurement signal-to-control signal sub-module, the pulse signal with any pulse width and period can be generated according to the requirements of a user, so that the detection of the external expandable pulse signal is realized.
Claims (7)
1. A broadband instantaneous frequency measurement device is characterized by comprising a front-end amplification module, a coupling circuit module, a detection circuit module, a control circuit module and a switch circuit module; the control circuit module comprises a direct current signal-to-frequency measurement signal submodule and a frequency measurement signal-to-control signal submodule;
the signal input end of the front-end amplification module is used as the radio-frequency signal input end of the broadband instantaneous frequency measurement device; the amplified signal output end of the front-end amplification module is connected with the amplified signal input end of the coupling circuit module; the first coupling signal output end and the second coupling signal output end of the coupling circuit module are respectively connected with the coupling signal input end of the switch circuit module and the coupling signal input end of the detection circuit module in a one-to-one correspondence manner; the direct-current signal output end of the detection circuit module is connected with the direct-current signal input end of the direct-current signal to frequency measurement signal submodule; the frequency measurement signal output end of the direct current signal-to-frequency measurement signal submodule is connected with the frequency measurement signal input end of the frequency measurement signal-to-control signal submodule; the control signal output end of the frequency measurement signal-to-control signal sub-module is connected with the control signal input end of the switch circuit module; the frequency measurement signal input end of the frequency measurement signal-to-control signal sub-module is used as an external control signal input end when being connected with expandable external pulses; and the output end of the switch circuit module is used as a frequency measurement signal output end of the broadband instantaneous frequency measurement device.
2. The broadband instantaneous frequency measurement device according to claim 1, wherein the front-end amplification module comprises a pad CT1, a capacitor C3, a filter chip F1, a capacitor C4, a radio frequency amplification chip U1, an inductor L1, a grounding capacitor C2, a grounding capacitor C1, a resistor R1, a power-up pad S1, a capacitor C5 and a pad CT 2;
one end of the pad CT1 is a signal input end of the front-end amplification module and is also used as a radio-frequency signal input end of the broadband instantaneous frequency measurement device; the other end of the pad CT1 is connected with one end of a capacitor C3; the other end of the capacitor C3 is connected with the 1 st pin of the filter chip F1; the No. 2 pin and the No. 3 pin of the filter chip F1 are connected and grounded; the 4 th pin of the filter chip F1 is connected with one end of a capacitor C4; the other end of the capacitor C4 is connected with the 1 st pin of the radio frequency amplification chip U1; the No. 2 pin and the No. 3 pin of the radio frequency amplification chip are respectively grounded; the 4 th pin of the radio frequency amplification chip is respectively connected with one end of an inductor L1 and one end of a capacitor C5; the other end of the inductor L1 is respectively connected with one end of a grounding capacitor C2, a grounding capacitor C1 and a resistor R1; the other end of the resistor R1 is connected with an application bonding pad S1; the other end of the capacitor C5 is connected with one end of a pad CT 2; the other end of the pad CT2 is used as an amplified signal output end of the front-end amplification module and is connected with the coupling circuit module.
3. The broadband instantaneous frequency measuring device according to claim 2, wherein the coupling circuit module comprises a dielectric slab body, a front surface strip line arranged on the front surface of the dielectric slab body, a back surface strip line arranged on the back surface of the dielectric slab body, a ground resistor R12 and six screw fixing reserved holes arranged on the dielectric slab body;
the front stripline is positioned at one end of the left side of the front of the dielectric slab body, is an amplified signal input end of the coupling circuit module and is connected with the other end of the pad CT 2; one end of the front stripline, which is positioned on the right side of the front of the dielectric slab body, is a first coupling signal output end of the coupling circuit module and is connected with the switch circuit module; the front side strip line and the back side strip line are connected through radiation; one end of the back strip line, which is positioned at the left lower side of the back of the dielectric slab body, is a second coupling signal output end and is connected with the detection circuit module; and one end of the back stripline, which is positioned at the right lower side of the back of the dielectric slab body, is a load end of the coupling circuit module and is connected with a grounding resistor R12.
4. The broadband instantaneous frequency measurement device according to claim 3, wherein the detector circuit module comprises a pad S2, a grounding resistor R2, a capacitor C6, a chip U2 with the model AD8317, a capacitor C7, a resistor R3, a pad S3, a grounding resistor R4, a grounding capacitor C9, a grounding capacitor C10, a pad S4 and a grounding capacitor C8;
the 0 th pin of the chip U2 is grounded; the 1 st pin of the chip U2 is connected with one end of a capacitor C6; the other end of the capacitor C6 is respectively connected with one end of a grounding resistor R2 and one end of a bonding pad S2; the other end of the bonding pad S2 is used as a second coupling signal input end of the detection circuit and is connected with one end of the back strip line positioned at the left lower side of the back of the dielectric slab body; the 2 nd pin of the chip U2 is connected with one end of a capacitor C7 and is grounded; the 3 rd pin of the chip U2 is connected with the other end of the capacitor C7; the 4 th pin of the chip U2 is connected with one end of a resistor R3; the 5 th pin of the chip U2 is respectively connected with the other end of the resistor R3 and one end of the bonding pad S3; the other end of the bonding pad S3 is used as a direct current signal output end of the detection circuit module and is connected with the direct current signal to frequency measurement signal sub-module; the 6 th pin of the chip U2 is connected with a grounding resistor R4; the 7 th pin of the chip U2 is respectively connected with a grounding capacitor C9, a grounding capacitor C10 and a bonding pad S4, and the bonding pad S4 is externally connected with a +5V power supply; the 8 th pin of the chip U2 is connected with a grounding capacitor C8.
5. The broadband instantaneous frequency measurement device according to claim 4, wherein the direct current signal-to-frequency measurement signal sub-module comprises a pad K1, a resistor R5, a chip U3, a grounded capacitor C11, a resistor R6, a grounded resistor R7, a resistor R8 and a pad D1;
one end of the bonding pad K1 is used as a direct-current signal input end of the direct-current signal to frequency measurement signal sub-module, and the other end of the bonding pad S3 is connected; the other end of the bonding pad K1 is connected with one end of a resistor R5; the other end of the resistor R5 is connected with the 3 rd pin of the chip U3; the 1 st pin of the chip U3 is respectively connected with one end of a resistor R6 and a grounding capacitor C11 and is externally connected with a power supply VCC; the other end of the resistor R6 is respectively connected with the No. 2 pin of the chip U3 and a grounding resistor R7; the 4 th pin of the chip U3 is grounded; the 5 th pin of the chip U3 is connected with the 6 th pin thereof and is grounded; the 7 th pin of the chip U3 is connected with one end of a resistor R8; the other end of the resistor R8 is connected with one end of a bonding pad D1; the other end of the bonding pad D1 is used as a frequency measurement signal output end of the direct current signal-to-frequency measurement signal submodule and is connected with the frequency measurement signal-to-control signal submodule.
6. The broadband instantaneous frequency measurement device of claim 5, wherein the frequency measurement signal-to-control signal submodule comprises a pad CT3, a resistor R9, a chip U4, a grounded capacitor C13, a grounded capacitor C12, a pad CT5, a grounded capacitor C14, a grounded capacitor C15, a grounded capacitor C16, a resistor R10, a grounded capacitor C17, a pad CT4 and a pad CT 6;
one end of the bonding pad CT3 is used as a frequency measurement signal input end of the frequency measurement signal-to-control signal submodule and is connected with the other end of the bonding pad D1; the other end of the pad CT3 is connected with one end of a resistor R9; the other end of the resistor R9 is connected with the No. 2 pin of the chip U4; the 1 st pin of the chip U4 is grounded; the 3 rd pin of the chip U4 is respectively connected with a grounding capacitor C13, a grounding capacitor C12 and a bonding pad CT 5; the pad CT5 is externally connected with a-5V power supply; the 6 th pin of the chip U4 is respectively connected with a grounding capacitor C15, a grounding capacitor C16 and a bonding pad CT 6; the pad CT6 is externally connected with a +5V power supply; the 7 th pin of the chip U4 is connected with one end of a resistor R10; the other end of the resistor R10 is respectively connected with one end of a bonding pad CT4 and a grounding capacitor C17; the other end of the pad CT4 is used as a control signal output end of a frequency measurement signal-to-control signal conversion submodule and is connected with the switch circuit module; and the 8 th pin of the chip U4 is connected with a grounding capacitor C14 and is externally connected with a power supply VCC.
7. The broadband instantaneous frequency measurement device according to claim 6, wherein the switch circuit module comprises a pad CT7, a capacitor C18, an inductor L2, a ground resistor R11, a Pin switch chip U5, a diode D1, a diode D2, an inductor L3, a ground capacitor C20, a capacitor C19 and a pad CT 8;
one end of the pad CT7 is used as a first coupling signal input end of the switch circuit module and is connected with one end of the front strip line positioned on the right side of the front of the dielectric slab body; the other end of the pad CT7 is connected with one end of a capacitor C18; the other end of the capacitor C18 is respectively connected with the inductor L2 and the 1 st Pin of the Pin switch chip U5; the other end of the inductor L2 is connected with a grounding resistor R11; the 2 nd Pin of the Pin switch chip U5 is respectively connected with the anode of the diode D1, the anode of the diode D2, one end of the inductor L3 and one end of the capacitor C19; (ii) a The cathodes of the diode D1 and the diode D2 are both grounded; the other end of the inductor L3 is connected with a grounding capacitor C20 and is connected with the other end of the pad CT4 as a control signal input end of the switch circuit module; the other end of the capacitor C19 is connected with one end of a pad CT 8; the other end of the pad CT8 is used as the output end of the switch circuit module and is also used as the frequency measurement signal output end of the broadband instantaneous frequency measurement device.
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| CN114785358A (en) * | 2022-03-31 | 2022-07-22 | 成都九洲迪飞科技有限责任公司 | Miniaturized L-to-C waveband multi-channel self-adaptive frequency converter |
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