CN111355483A - Device capable of expanding multi-channel 10MHz reference signal and feeding and application method thereof - Google Patents
Device capable of expanding multi-channel 10MHz reference signal and feeding and application method thereof Download PDFInfo
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- CN111355483A CN111355483A CN202010295733.8A CN202010295733A CN111355483A CN 111355483 A CN111355483 A CN 111355483A CN 202010295733 A CN202010295733 A CN 202010295733A CN 111355483 A CN111355483 A CN 111355483A
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- H—ELECTRICITY
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- H03L5/00—Automatic control of voltage, current, or power
- H03L5/02—Automatic control of voltage, current, or power of power
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
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Abstract
The invention discloses a device capable of expanding multi-path 10MHz reference signals and feeding and an application method thereof, wherein the device realizes connection between an antenna feed source waveguide port and a plurality of up/down converters; the device comprises at least one conditioning board capable of expanding multi-path 10MHz reference signals and feeding. The device capable of expanding multi-channel 10MHz reference signals and feeding and the application method thereof provided by the invention have the advantages that the conditioning board is arranged in the device, the device can be expanded to 32 channels to be output simultaneously according to actual needs, the plasticity is strong, the board clamping structure is convenient to install and upgrade, the coexistence of a power supply circuit and a clock circuit is realized through the matching of the amplifying circuit, the filtering circuit and the isolating circuit on the conditioning board, the feeding clock function can be realized through engineering development, and the performance is excellent.
Description
Technical Field
The invention relates to a device for use in satellite communication. More particularly, the present invention relates to an apparatus for providing a reference signal and a power feed for a satellite communication up-down converter, which can expand multiple 10MHz reference signals and power feeds, and a method for applying the same.
Background
The reference signal and the feed play a crucial role in the satellite communication down converter, because the low-noise down converter and the high-power up-conversion amplifier (hereinafter, simply referred to as up-converter) in satellite communication have a phase-locked loop circuit (PLL), and the frequency to be phase-locked is compared with the reference signal in frequency division to ensure the stability and accuracy of frequency output, the precision and stability of the reference signal are very important, and most of the down converters are single-port input, so that the reference signal and the power supply are required to be input at the same time in one interface.
The existing reference signal source in the market is mostly a single signal source, only one path of output exists, and when the signal is input into the up-down converter through the power divider combiner with the feed in the actual use process, because the isolation processing is not carried out between the reference signal and the power supply, the power supply can reduce the level intensity of the reference signal source, the up-down converter can not normally work, the test requirement can not be met when the multi-path homologous reference signal is required to be tested, meanwhile, the market special signal source is expensive, the using method is complex, and the signal can be used after being trained.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and/or disadvantages and to provide at least the advantages described hereinafter.
To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided an apparatus capable of expanding multiple 10MHz reference signals and feeds, the apparatus implementing connections between antenna feed waveguide ports and a plurality of up/down converters;
the device comprises at least one conditioning board capable of expanding multi-path 10MHz reference signals and feeding.
Preferably, the conditioning plate is configured to include:
a signal source crystal oscillator for generating a 10MHz reference signal;
the DC/DC unit is used for providing working voltage for the signal source crystal oscillator;
an AC/DC power supply module connected to the DC/DC unit to provide respective feeds to the corresponding up/down converters;
the multiple paths of amplifying and filtering circuits are connected with the signal source crystal oscillator circuit and used for conditioning and outputting the received reference signals;
and after the power feed output by each isolating circuit is combined with the reference signal output by each amplifying and filtering circuit, the combined power feed is output to the corresponding up/down converter through the corresponding SMA connector.
Preferably, the signal source crystal oscillator is configured to adopt a sine wave crystal oscillator, and the power supply voltage thereof is configured to provide +5V DC fixed voltage output by adopting a switching voltage regulator;
and the switching voltage regulator is also provided with a +5Vr voltage switch.
Preferably, each of the amplifying and filtering circuits is configured to include:
an OPA690ID amplification chip for performing gain on a 10MHz reference signal output by the signal source crystal oscillator, wherein an IN-pin of the chip is connected with the output end of the signal source crystal oscillator;
a 5-order narrow bandwidth low pass filter connected to the OUT pin of the OPA690ID amplification chip to suppress harmonics and spurs in the reference signal;
capacitors C21 and C11 for blocking the direct current are respectively arranged between the OUT pin and the 5-order narrow-bandwidth low-pass filter and between the 5-order narrow-bandwidth low-pass filter and the SMA connector;
resistors R4 and R5 for adjusting the gain of the OPA690ID amplification chip are respectively arranged between the output end of the signal source crystal oscillator and the IN-pin and between the IN-pin and the OUT-pin;
a capacitor C19 which is connected with the resistor R4 IN parallel for pole compensation is further arranged between the IN-pin and the OUT-pin;
the OPA690ID amplifies the voltage between the IN + pin of the non-inverting terminal of the chip and the power supply, and sets the bias voltage through the resistors R7 and R8 when the single power supply operates.
Preferably, the isolation circuit is configured to include:
the choke inductance groups L2 and L3 are connected in series with the output ends of the power switch and the SMA connector interface;
capacitors C9 and C12 for filtering the reference signal, wherein one side of the capacitors is respectively connected with the choking inductor group in parallel and the SMA connector, and the other side of the capacitors is grounded;
wherein the power switch is configured to be a voltage switch of 18V, and a resettable fuse REX020 is arranged on the output end of the power switch.
A method for using and can expand the multi-channel 10MHz reference signal and feeder apparatus, through setting up the conditioning plate between waveguide port and up/down converter, in order to output the multi-channel conditioning signal including feed and reference signal at the same time;
each path of conditioning signal is respectively connected with the corresponding up/down converter, so that the expansion of multi-path signal output is realized.
Preferably, the 10MHz reference signals in the conditioning board are generated by the same signal source crystal oscillator and are respectively connected to the corresponding amplification and filtering circuits.
Preferably, each path of conditioning signal output can be provided with a feeding signal and/or a reference signal selectively through a voltage switch and a power switch which are matched with each other on the conditioning board.
Preferably, the output feed on the conditioning board isolates the reference signal from the dc power supply through a matched isolation circuit.
The invention at least comprises the following beneficial effects: firstly, the conditioning plate is arranged in the device, the output can be expanded to 32 paths at the same time according to actual needs, the plasticity is strong, and the plate clamping type structure is convenient to install and upgrade.
Secondly, the conditioning board realizes coexistence of power supply and a clock circuit through the matching of the amplifying circuit, the filtering circuit and the isolating circuit, can realize the function of feeding the clock through engineering development, and has excellent performance.
Thirdly, the invention can simultaneously ensure that each path of signal comes from the same signal source under the condition of realizing the simultaneous output of the multi-path feed clock-fed signals, and can ensure the accuracy and the rigor of the test result when being used as test equipment.
Fourthly, the output of the feed clock is manually controlled through a button switch, so that the operation is convenient and simple, the cost is low, and the feed clock is suitable for batch production; if the power divider is required to be connected with an external power supply for combining and outputting to test equipment during use, the isolation circuit in the device can ensure that the output reference signal is not interfered by the external power supply, and the output signal is stable and accurate.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a block diagram of the circuit configuration of a conditioning board in an embodiment of the invention;
FIG. 2 is a schematic diagram of a source crystal oscillator according to another embodiment of the present invention;
FIG. 3 is a schematic diagram of a 10MHz reference signal switch in accordance with another embodiment of the present invention;
FIG. 4 is a schematic diagram of a filter amplifier isolation circuit according to another embodiment of the present invention;
FIG. 5 is a schematic diagram of a power switch in another embodiment of the present invention;
FIG. 6 is a block diagram of an application of multiple reference signals and a feeding device according to an embodiment of the present invention;
fig. 7 is a block diagram of an application of multiple reference signals and a feeding device according to another embodiment of the present invention.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
It is to be understood that in the description of the present invention, the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are used only for convenience in describing the present invention and for simplification of the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise specifically stated or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are used in a broad sense, and for example, "connected" may be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements.
Fig. 1 shows an implementation of an apparatus according to the invention capable of expanding multiple 10MHz reference signals and feeds, with up/down converters 8 connected between the antenna feed waveguide port and the spectrometer, and with the apparatus connected between the antenna feed waveguide port and a plurality of up/down converters;
the device comprises at least one conditioning board 1 capable of expanding multiple paths of 10MHz reference signals and feeding, in the structure, the output signals of the device can be expanded to output multiple paths of conditioning signals such as 4-8 paths of conditioning signals under the action of a single conditioning board, and 32 paths of conditioning signals can be output by connecting multiple conditioning boards in series, so that the device is suitable for the use requirements of different detection occasions, the device is low in production cost, simple and convenient to operate, can be used as a low-cost experiment tool, namely can be expanded to the maximum 32 paths to be output simultaneously in actual use, and is strong in plasticity, and the structure of a board clamp type is convenient to install and upgrade.
As in fig. 1, in another example, the conditioning plate is configured to include:
a signal source crystal oscillator 2 for generating a 10MHz reference signal;
a DC/DC unit 3 for providing working voltage to the signal source crystal oscillator;
an AC/DC power supply module 4 connected to the DC/DC unit to provide respective feeds to the corresponding up/down converters;
the multi-channel amplifying and filtering circuits 5 and 6 are connected with a signal source crystal oscillator circuit to condition and output received reference signals, under the connection mode, each channel of reference signals on each conditioning board can be ensured to be from the same signal source, the consistency of output parameters of each channel of signals is ensured, in the working process, the signal source output after the crystal oscillator is electrified is used as a reference signal, the signal is amplified by the amplifying circuit and then purified by filtering of the filtering circuit, the output reference signal is ensured to be clean and then output to the interface 2 of the SMA connector, and the output of the reference signal is realized;
the multi-path isolation circuit 7 connected with the output end of the AC/DC power supply module adopts the isolation circuit to effectively avoid the interference of the power supply to the reference signal, and ensures the stability of the signal after the later combined output, the feed output by each path of isolation circuit is combined with the reference signal output by each path of amplifying and filtering circuit, and the combined signal is output to the corresponding up/down converter through the corresponding SMA connector 22, the signal output can expand the radio frequency interface of the SMA connector according to the actual requirement, and can expand to 32 paths at most, the conditioning board of the device can realize the simultaneous output of the reference signal (clock feed) and the feed, and simultaneously ensures that each path of reference signal is from the same signal source, and when the device is used as a test device, the accurate and strict test result can be ensured, in the actual work, the reference signal is generated by a crystal oscillator signal source and is output by a crystal oscillator 4 port and then is input to an amplifying chip OPA690 35, the +18VDC power supply is combined with the reference signal through the isolation circuit to be output to the pin 2 of the SMA interface.
2-3, in another example, the signal source crystal oscillator is configured as a sine wave crystal oscillator, a JTM5189-C type sine wave crystal oscillator can be used to output a sine wave 10MHz reference signal, the power supply voltage is configured to provide a +5V DC fixed voltage output by using a switching voltage regulator 9, the switching voltage regulator is LM2596S-5, the device can output a 3A driving current and has good linearity and fixed output +5V voltage characteristics, and X310 is used as a +5V voltage switch;
the switching voltage regulator is also provided with a +5Vr voltage switch, the output of the feed clock is manually controlled by a button switch in the scheme, the operation is convenient and simple, the cost is low, the batch production is suitable, and the adopted 10MHz crystal oscillator is a temperature compensation voltage control crystal oscillator and outputs sine waves. Wherein, C2, C3 and C68 play the role of voltage stabilization and filtering, can restrain the stray on the power supply, make the 10MHz signal of output have higher purity, and its output is connected with 10M _ IN end IN the amplifying, filtering circuit.
As shown in fig. 4, in another example, each of the amplifying and filtering circuits is configured to include:
an OPA690ID amplification chip 11 for performing gain on a 10MHz reference signal output by a signal source crystal oscillator, wherein an IN-pin of the OPA690ID amplification chip is connected with an output end of the signal source crystal oscillator, an OPA690ID amplification chip is adopted IN an amplification circuit for amplifying the reference signal, and a matched LM2596S-5 chip is adopted for realizing power supply to the amplification chip;
a 5-order narrow-bandwidth low-pass filter 12 connected to the OUT pin of the OPA690ID amplification chip to suppress harmonics and spurs in the reference signal, for example, fig. 4, inductors L4, L5, L6, and L7 cooperate with capacitors C14, C15, C16, C17, and C18 to form a 5-order narrow-bandwidth low-pass filter for suppressing harmonics and spurs, and C11 is a filtered dc blocking capacitor;
capacitors C2113 and C1114 for blocking are respectively arranged between the OUT pin and the 5-order narrow-bandwidth low-pass filter and between the 5-order narrow-bandwidth low-pass filter and the SMA connector;
resistors R415 and R516 for adjusting the gain of an OPA690ID amplification chip are respectively arranged between the output end of the signal source crystal oscillator and the IN-pin and between the IN-pin and the OUT-pin;
a capacitor C1917 which is connected with the resistor R4 IN parallel for pole compensation is also arranged between the IN-pin and the OUT-pin;
IN the scheme, a feed clock feeding circuit is used for feeding a clock signal and a direct current signal into an up-down conversion module at the front end of a radio frequency through a two-IN-one path. The main function of the circuit is to satisfy the reference signal output and the direct current supply output on one hand, and on the other hand, the reference signal output and the direct current supply output cannot be mutually influenced. In order to improve the driving capability of the clock circuit, an operational amplifier is added. The operational amplifier plays a role in buffer isolation between the crystal oscillator and the clock output circuit. And crystal oscillator operation overload and clock signal reflection are avoided. The operational amplifier adopts an OPA690, and the OPA690 is a wide-band voltage feedback operational amplifier with a disabling function, and has the characteristics of high voltage slew rate and stable unit gain. The unit gain bandwidth can reach 500MHz, and the input voltage noise and the current noise are low. And reasonable gain is set, so that the use of 10MHz signals can be met. The single-power-supply 5V power supply can be realized, 190mA driving current can be provided, 50-ohm load can be driven, the output power can reach 17dBm, the requirement of the input power of the radio frequency front end is met, the operational amplifier circuit adopts reverse amplification, and the operational amplifier gain value is reasonably designed according to the power of an input 10MHz signal. Gain is adjusted by adjusting R4 and R5 values, and the value of C19 is selected for pole compensation, so that the self-excitation of the operational amplifier is avoided. R7 and R8 at the non-inverting input end are used for setting bias voltage when a single power supply works, and the output end C21 is used for blocking direct current output.
4-5, in another example, the isolation circuit is configured to include:
choke inductance groups L220 and L321 for preventing the reference signal from crosstalk power supply are connected in series at the output ends of the interface 2 of the SMA connector 22 and the power supply switch, and L2 and L3 are choke inductances for preventing the 10MHz signal from crosstalk power supply;
capacitors C923, C1224, C9 and C12 for filtering the reference signal are used for filtering 10MHz signals in general, prevent the power from being polluted, and influence other parts of the system to work, wherein the capacitors are respectively connected with a choke inductor group in parallel with an SMA connector on one hand, and are grounded on the other hand;
wherein, the power switch 25 is configured to adopt X2 as a voltage switch of +18V, and the output end is provided with a resettable fuse REX 02026, EX020 is used as a resettable fuse, and has overload protection in the circuit, and can reset automatically after the circuit is recovered to normal, thereby ensuring the normal operation of the circuit, in the structure, the output of the feed clock is manually controlled by a button switch, the operation is convenient and simple, the cost is low, the feed clock is suitable for batch production, namely when a power divider is used for connecting an external power supply and the device of the scheme for combining and outputting to a test device, the feed in the device can be cut off, but an isolation capacitor in the device can ensure that the output reference signal is not interfered by the external power supply, thereby ensuring the stability and accuracy of the output signal, in the scheme, the isolation processing is carried out between the reference signal and the power supply, and components such as an inductor, a fuse, a capacitor and the like are used for forming an, the reference signal and the dc power supply are isolated.
A method for using and can expand the multi-channel 10MHz reference signal and feeder apparatus, through setting up the conditioning plate between waveguide port and up/down converter, in order to output the multi-channel conditioning signal including feed and reference signal at the same time;
each path of conditioning signal is respectively connected with the corresponding up/down converter, the expansion of multi-path signal output is realized, the scheme realizes the coexistence of power supply and a clock circuit through the cooperation of the amplifying circuit, the filter circuit and the blocking circuit, the clock feed function can be realized through engineering development, and the performance is excellent.
In another example, the 10MHz reference signals in the conditioning board are generated by the same signal source crystal oscillator and are respectively connected to the corresponding amplification and filtering circuits, and in this scheme, by applying this way, it is ensured that each path of signals is from the same signal source, and when the signals are used as test equipment, it is ensured that the test result is accurate and precise.
In another example, each path of conditioning signal output can be selectively provided with a feed signal and/or a reference signal through a voltage switch and a power switch which are matched with each other on a conditioning board, in a specific conditioning board, 4 paths of SMA output interfaces on the conditioning board and 4 paths of SMA output interfaces under the conditioning board can independently control an output power supply and output the reference signal or output the reference signal simultaneously through two groups of switches, and FIGS. 6-7 are use block diagrams in the specific application of the invention, and FIG. 6 can realize that the maximum 32 paths (currently 8 paths) of power supplies and reference signals are output simultaneously or independently; fig. 7 can realize that the normal work of the up-down converter can still be guaranteed after the reference signal and the external power supply are combined by the power divider, in the working process, the output reference signal after the crystal oscillator is electrified is amplified by the amplifying circuit and then filtered and output to the SMA interface by the filter circuit, the power supply and the reference signal adopt the built-in resistor to control the output from the reset button switch, namely, the feed clock output is manually controlled by the button switch, the operation is convenient and simple, the cost is low, and the mass production is suitable.
In another example, the output feed on the conditioning board isolates the reference signal and the direct-current power supply through the matched isolating circuit, and if the power divider is required to be connected to an external power supply for combining and outputting to the testing equipment during use, the isolating circuit in the device can ensure that the output reference signal is not interfered by the external power supply, and the output signal is stable and accurate.
The above scheme is merely illustrative of a preferred example, and is not limiting. When the invention is implemented, appropriate replacement and/or modification can be carried out according to the requirements of users.
The number of apparatuses and the scale of the process described herein are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art.
While embodiments of the invention have been disclosed above, it is not intended to be limited to the uses set forth in the specification and examples. It can be applied to all kinds of fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. It is therefore intended that the invention not be limited to the exact details and illustrations described and illustrated herein, but fall within the scope of the appended claims and equivalents thereof.
Claims (9)
1. A device capable of expanding multi-path 10MHz reference signals and feeding is characterized in that the device realizes connection between an antenna feed source waveguide port and a plurality of up/down converters;
the device comprises at least one conditioning board capable of expanding multi-path 10MHz reference signals and feeding.
2. The apparatus capable of spreading multiple 10MHz reference signals and feeds of claim 1, wherein each conditioning board is configured to include:
a signal source crystal oscillator for generating a 10MHz reference signal;
the DC/DC unit is used for providing working voltage for the signal source crystal oscillator;
an AC/DC power supply module connected to the DC/DC unit to provide respective feeds to the corresponding up/down converters;
the multiple paths of amplifying and filtering circuits are connected with the signal source crystal oscillator circuit and used for conditioning and outputting the received reference signals;
and after the power feed output by each isolating circuit is combined with the reference signal output by each amplifying and filtering circuit, the combined power feed is output to the corresponding up/down converter through the corresponding SMA connector.
3. The apparatus of claim 1, wherein the signal source crystal is configured to use a sine wave crystal, and a supply voltage thereof is configured to use a switching voltage regulator to provide a +5V DC fixed voltage output;
and the switching voltage regulator is also provided with a +5Vr voltage switch.
4. The apparatus capable of spreading multiple 10MHz reference signals and feeds of claim 1, wherein each of said amplifying, filtering circuits is configured to include:
an OPA690ID amplification chip for performing gain on a 10MHz reference signal output by the signal source crystal oscillator, wherein an IN-pin of the chip is connected with the output end of the signal source crystal oscillator;
a 5-order narrow bandwidth low pass filter connected to the OUT pin of the OPA690ID amplification chip to suppress harmonics and spurs in the reference signal;
capacitors C21 and C11 for blocking the direct current are respectively arranged between the OUT pin and the 5-order narrow-bandwidth low-pass filter and between the 5-order narrow-bandwidth low-pass filter and the SMA connector;
resistors R4 and R5 for adjusting the gain of the OPA690ID amplification chip are respectively arranged between the output end of the signal source crystal oscillator and the IN-pin and between the IN-pin and the OUT-pin;
a capacitor C19 which is connected with the resistor R4 IN parallel for pole compensation is further arranged between the IN-pin and the OUT-pin;
the OPA690ID amplifies the voltage between the IN + pin of the non-inverting terminal of the chip and the power supply, and sets the bias voltage through the resistors R7 and R8 when the single power supply operates.
5. The apparatus capable of spreading multiple 10MHz reference signals and feeds of claim 1, wherein the isolation circuit is configured to include:
the choke inductance groups L2 and L3 are connected in series with the output ends of the power switch and the SMA connector interface;
capacitors C9 and C12 for filtering the reference signal, wherein one side of the capacitors is respectively connected with the choking inductor group in parallel and the SMA connector, and the other side of the capacitors is grounded;
wherein the power switch is configured to be a voltage switch of 18V, and a resettable fuse REX020 is arranged on the output end of the power switch.
6. A method for applying the device capable of expanding multiple 10MHz reference signals and feeding power of any one of claims 1-5, wherein multiple conditioning signals including both the feeding power and the reference signal are output by arranging a conditioning plate between the waveguide port and the up/down converter;
each path of conditioning signal is respectively connected with the corresponding up/down converter, so that the expansion of multi-path signal output is realized.
7. The method as claimed in claim 6, wherein the 10MHz reference signals in the conditioning board are generated by a same signal source crystal oscillator and are respectively connected to the corresponding amplifying and filtering circuits.
8. The method of claim 6, wherein the power switch and the power switch are matched to selectively enable the power supply and/or the reference signal to the output of each conditioning signal.
9. The method of claim 6, wherein the output feed on the conditioning board isolates the reference signal from the dc power supply through a matching isolation circuit.
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| CN202010295733.8A CN111355483A (en) | 2020-04-15 | 2020-04-15 | Device capable of expanding multi-channel 10MHz reference signal and feeding and application method thereof |
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| CN202010295733.8A CN111355483A (en) | 2020-04-15 | 2020-04-15 | Device capable of expanding multi-channel 10MHz reference signal and feeding and application method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113438005A (en) * | 2021-08-27 | 2021-09-24 | 中国人民解放军海军工程大学 | Satellite communication ground station interference protection device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113438005A (en) * | 2021-08-27 | 2021-09-24 | 中国人民解放军海军工程大学 | Satellite communication ground station interference protection device and method |
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