CN210899103U - Large-dynamic fine-stepping numerical control attenuator system - Google Patents
Large-dynamic fine-stepping numerical control attenuator system Download PDFInfo
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- CN210899103U CN210899103U CN201922452054.2U CN201922452054U CN210899103U CN 210899103 U CN210899103 U CN 210899103U CN 201922452054 U CN201922452054 U CN 201922452054U CN 210899103 U CN210899103 U CN 210899103U
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Abstract
The utility model discloses a large dynamic fine stepping numerical control attenuator system, which relates to the field of attenuation control and comprises a power module, a control interface, a control correction register, a first drive circuit, a second drive circuit, a fine stepping attenuation submodule and a coarse stepping attenuation module; the coarse stepping attenuation module comprises a plurality of stages of attenuation sub-modules which are sequentially cascaded, and each stage of attenuation sub-module comprises a thin film fixed attenuator and a PIN tube switch which is connected in parallel with the thin film fixed attenuator; the system overcomes the limitation of the traditional numerical control attenuator, has extremely wide working frequency, a very large dynamic range, good attenuation precision and stepping, the output power is easy to control, the PIN tube switch and the thin film fixed attenuator are integrated into a universal module, so that the system has the advantages of small volume, light weight and the like, and the connection mode of the coarse stepping attenuation module and the fine stepping attenuation submodule is flexibly changed, so that the system can be widely applied to use scenes such as various radars, electronic countermeasure, instrument equipment and the like.
Description
Technical Field
The utility model belongs to the technical field of the attenuation control and specifically relates to a fine step numerical control attenuator system of big developments.
Background
The numerical control attenuators in the radar and the electronic countermeasure equipment have higher requirements on performance such as working frequency range, attenuation dynamic range, attenuation precision, switching speed, adaptive temperature range, vibration resistance, volume power consumption and the like. This requires the selection of a reasonable attenuation control scheme, and the current main attenuation schemes are: resistance network attenuation technology, thin film fixed attenuator technology, PIN tube numerical control attenuation technology, and Monolithic Microwave Integrated Circuit (MMIC) attenuation technology.
Resistive network attenuation is a relatively widespread technology used in the early days. The attenuation control circuit is mainly formed by adopting a resistance network, and although the attenuation control circuit is convenient to debug, the attenuation control circuit cannot control attenuation in real time.
The film fixed attenuator technology is formed by technical upgrading on the resistance network attenuation technology, has smaller volume, larger frequency band and environmental adaptability, but can only be replaced by another film fixed attenuator when the attenuation level can not meet the requirement due to the fixed and unadjustable attenuation level, so that the debugging is very inconvenient and the usability is poor.
The PIN tube attenuation technology adopts a voltage-controlled bias technology to realize the change of the resistance value of the PIN tube, adopts a resistance network attenuation technology to realize the real-time attenuation control of the power, and is relatively small in working frequency band and tolerant power limited by the PIN tube.
The MMIC attenuation technology represents the direction of numerical control attenuation technology, and is one of key technologies for the integration and miniaturization of microwave equipment. The advantages of this technique are continuous fast switching of the attenuation, extremely high resolution, small volume, working bandwidth, etc., but its attenuation dynamic range is limited.
None of the above attenuation methods can fully satisfy the requirements of radar and electronic countermeasure equipment system outfield.
SUMMERY OF THE UTILITY MODEL
The present invention provides a large dynamic fine step numerical control attenuator system aiming at the above problems and technical requirements. The system can solve the problem that the existing numerical control attenuator is not suitable for being used in radar and electronic anti-external field equipment.
The technical scheme of the utility model as follows:
a large dynamic fine stepping numerical control attenuator system comprises a power module, a control interface, a control correction register, a first drive circuit, a second drive circuit, a fine stepping attenuation submodule and a coarse stepping attenuation module, wherein the fine stepping attenuation submodule comprises an MMIC attenuator, the coarse stepping attenuation module comprises a plurality of stages of attenuation submodules which are sequentially cascaded, and each stage of attenuation submodule comprises a thin film fixed attenuator and a PIN tube switch which is connected with the thin film fixed attenuator in parallel; the power supply module is respectively connected with the control correction register, the first drive circuit, the second drive circuit, the MMIC attenuator and the coarse stepping attenuation module and supplies power, the control interface is connected with the control correction register, the control correction register is respectively connected with the first drive circuit and the second drive circuit, the first drive circuit is connected with the MMIC attenuator, the second drive circuit is correspondingly connected with a PIN tube switch of each stage of attenuation submodule, the MMIC attenuator is connected with the coarse stepping attenuation module, the input end of the MMIC attenuator is the MMIC attenuator, the output end of the MMIC attenuator is the coarse stepping attenuation module, or the input end of the MMIC attenuator is the coarse stepping attenuation module, and the output end of the MMIC attenuator is.
The further technical scheme is that the MMIC attenuator is realized based on the HMC939 model, the step of the MMIC attenuator is 1dB, and the thin film fixed attenuator of each stage of attenuation submodule adopts the thin film fixed attenuator with the step of 10 dB.
The utility model has the beneficial technical effects that:
MMIC attenuation technology, film fixed attenuator technology and PIN pipe attenuation technology have been introduced to this application for the attenuator system of this application has overcome the restriction of traditional numerical control attenuator, have extremely wide operating frequency (DC-40GHz), the temperature range, high switching speed, very big dynamic range (≧ 120dB), good attenuation precision and step, high power stability and reliability, and output is easily controlled, through integrating PIN pipe switch and film fixed attenuator into general module, make the system of this application have small, the anti-vibration is strong, the consumption is little, light in weight etc. advantage, through the connected mode of nimble thick step attenuation module and thin step attenuation submodule of changing, make this system can be applied to various radars on a large scale, electronic countermeasure, use scenes such as instrument and equipment.
Drawings
FIG. 1 is a block diagram of a large dynamic fine step digitally controlled attenuator system as disclosed in the present application.
Detailed Description
The following describes the embodiments of the present invention with reference to the accompanying drawings.
As shown in fig. 1, a large dynamic fine step numerical control attenuator system includes a power module, a control interface, a control correction register, a first driving circuit, a second driving circuit, a fine step attenuation submodule, and a coarse step attenuation module.
The fine stepping attenuation sub-module comprises an MMIC attenuator, the MMIC attenuator is realized based on an HMC939 model, the stepping of the MMIC attenuator is 1dB, the working frequency of the MMIC attenuator is DC-40GHz, and the ultra-wideband fine stepping fast attenuation control function can be realized. The coarse stepping attenuation module comprises a plurality of stages of attenuation sub-modules which are sequentially cascaded, each stage of attenuation sub-module comprises a thin film fixed attenuator and a PIN tube switch which is connected in parallel, the large stepping and large dynamic attenuation control function of an ultra-wide frequency band can be realized, and the large stepping is mainly ensured by the high-precision attenuation precision of the thin film fixed attenuator under the wide temperature and wide frequency range. For example, the system of the application adopts four stages of attenuation sub-modules which are sequentially cascaded, and the thin film fixed attenuator of each stage of attenuation sub-module adopts a thin film fixed attenuator with the step of 10 dB. The power supply module is respectively connected with the control correction register, the first drive circuit, the second drive circuit, the MMIC attenuator and the coarse stepping attenuation module, converts a 12V power supply into a 5V power supply through internal DC-DC and supplies power to the connecting devices. The control interface is connected with a control correction register, the control interface transmits an SPI signal or a level signal (namely attenuation correction) corrected in the FPGA to the control correction register for storage, the control correction register mainly stores the attenuation correction of each frequency band at each temperature, the control correction register is respectively connected with a first drive circuit and a second drive circuit, the first drive circuit is connected with an MMIC attenuator, the second drive circuit is correspondingly connected with a PIN tube switch of each attenuation submodule, and the first drive circuit and the second drive circuit are used for outputting TTL levels and have extremely high switching speed. The MMIC attenuator is connected with the coarse stepping attenuation module, so that the system has a very large dynamic attenuation range (more than or equal to 120dB), good attenuation precision and stepping, and very high power stability and reliability. Optionally, the input end is an MMIC attenuator, and the output end is a coarse stepping attenuation module. Or the input end is a coarse stepping attenuation module, and the output end is an MMIC attenuator. In addition, since the control correction register, the first driving circuit and the second driving circuit belong to circuits conventional in the art, detailed circuits thereof will not be described in detail herein.
In the application, the MMIC attenuator is connected with a first-stage attenuation sub-module, the MMIC attenuator ensures the attenuation accuracy of the film fixed attenuator under wide temperature and wide frequency by micro-adjusting each-stage attenuation sub-module, for example, the attenuation accuracy of the adjusted first-stage attenuation sub-module is 1-9, the attenuation accuracy of the second-stage attenuation sub-module is 11-19, the attenuation accuracy of the third-stage attenuation sub-module is 21-29 … …, and so on, and the working principle of the system is as follows:
the radio frequency power of radar and electronic countermeasure equipment is input into a large dynamic fine stepping numerical control attenuator system, the number of stages of the radio frequency power to be attenuated is input into a control interface and stored in a control correction register, when the system starts to work, the control correction register outputs the attenuation correction to a first driving circuit, the first driving circuit controls a fine stepping attenuation submodule (MMIC attenuator) to be conducted and attenuates the radio frequency signal, when the number of stages to be attenuated is not reached, the control correction register outputs the residual attenuation correction to a second driving circuit, the second driving circuit controls the number of PIN tube switches to be conducted according to the residual attenuation correction, for example, when 30dB of attenuation is needed, a third-stage PIN tube switch and a fourth-stage PIN tube switch are closed, and at the moment, the third-stage thin film fixed attenuator and the fourth-stage thin film fixed attenuator are short-circuited, after the front two stages of film fixed attenuators are connected into the circuit to form attenuation of 30dB, the attenuated radio frequency power is output to a system.
This application is through being integrated into general module with PIN pipe switch and film fixed attenuator for the system of this application has advantages such as small, the anti vibration is strong, the consumption is little, light in weight, and through the connected mode of nimble thick step attenuation module of transform and thin step attenuation submodule, make this system can be applied to various radars on a large scale, electronic countermeasure, use scenes such as instrument and equipment.
What has been described above is only a preferred embodiment of the present application, and the present invention is not limited to the above embodiments. It is to be understood that other modifications and variations directly derivable or suggested by those skilled in the art without departing from the spirit and scope of the present invention are to be considered as included within the scope of the present invention.
Claims (2)
1. A large dynamic fine stepping numerical control attenuator system is characterized by comprising a power module, a control interface, a control correction register, a first drive circuit, a second drive circuit, a fine stepping attenuation submodule and a coarse stepping attenuation module, wherein the fine stepping attenuation submodule comprises an MMIC attenuator, the coarse stepping attenuation module comprises a plurality of stages of attenuation submodules which are sequentially cascaded, and each stage of attenuation submodule comprises a thin film fixed attenuator and a PIN tube switch which is connected with the thin film fixed attenuator in parallel; the power module is respectively connected with the control correction register, the first drive circuit, the second drive circuit, the MMIC attenuator and the coarse stepping attenuation module and supplies power to the control correction register, the control interface is connected with the control correction register, the control correction register is respectively connected with the first drive circuit and the second drive circuit, the first drive circuit is connected with the MMIC attenuator, the second drive circuit is correspondingly connected with the PIN tube switch of each stage of attenuation submodule, the MMIC attenuator is connected with the coarse stepping attenuation module, the input end is the MMIC attenuator, the output end is the coarse stepping attenuation module, or the input end is the coarse stepping attenuation module, and the output end is the MMIC attenuator.
2. The system of claim 1, wherein the MMIC attenuator is implemented based on a HMC939 model, the steps of the MMIC attenuator are 1dB, and the thin film fixed attenuator of each stage of the attenuation sub-module is a thin film fixed attenuator with steps of 10 dB.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922452054.2U CN210899103U (en) | 2019-12-30 | 2019-12-30 | Large-dynamic fine-stepping numerical control attenuator system |
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| CN201922452054.2U CN210899103U (en) | 2019-12-30 | 2019-12-30 | Large-dynamic fine-stepping numerical control attenuator system |
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