CN104393937B - Radio frequency attenuation device - Google Patents
Radio frequency attenuation device Download PDFInfo
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- CN104393937B CN104393937B CN201410610500.7A CN201410610500A CN104393937B CN 104393937 B CN104393937 B CN 104393937B CN 201410610500 A CN201410610500 A CN 201410610500A CN 104393937 B CN104393937 B CN 104393937B
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Abstract
The invention belongs to the technical field of the automated testing of the sensitivity of radio frequency receiving equipment, and particularly relates to a low-cost high-precision radio frequency attenuation device. The radio frequency attenuation device comprises a numerical control attenuator, a first single-pole multiple-throw radio frequency switch, a fixed attenuator group and a second single-pole multiple-throw radio frequency switch, wherein the numerical control attenuator, the first single-pole multiple-throw radio frequency switch, the fixed attenuator group and the second single-pole multiple-throw radio frequency switch are connected in sequence; the attenuation amount and the stepping of the numerical control attenuator are independently 9dB and 1dB; the first single-pole multiple-throw radio frequency switch and the second single-pole multiple-throw radio frequency switch adopt the same specification and have the same switch channel amount; and the fixed attenuator group consists of a plurality of coaxial fixed attenuators of which the attenuation values are the integral multiple of 10dB. The low-cost high-precision radio frequency attenuation device adopts a mode that the single-pole multiple-throw radio frequency switches, the fixed attenuator and the numerical control attenuator are combined to control the change of the attenuation amount, and effectively solves a problem that the error of a multi-bit numerical control attenuator increases along with the change of an attenuation value, and the method also has the advantages of being low in cost and precise in control.
Description
Technical field
The invention belongs to the automatization testing technique field of radio frequency reception device sensitivity, and in particular to a kind of low cost is high
Precision radio frequency attenuating device.
Background technology
Receiver sensitivity test needs transmission signal to be reduced to certain value to simulate during telecommunication with attenuator
Space loss.When receiver is produced in batches, Automatic Test Equipment is needed.The survey of the numerical-control attenuator in Automatic Test Equipment
Examination precision is extremely important to the accuracy of test result.
PIN diode microwave numerical-control attenuator has the advantages that bandwidth, standing wave are little, loss is low, response is fast, now domestic
The numerical-control attenuator majority of production is reflection-type PIN diode numerical-control attenuator, in adjustable attenuation position during few situation, pad value
It is relatively more accurate.The sensitivity limit value of receiver is most below -100dBm, so needing multidigit numerical-control attenuator.With control
Position processed is increased, and error is also increasing.
The multidigit numerical-control attenuator precision of now import very well, but too expensive, the tens thousand of units of price, therefore how
Ensureing measuring accuracy while substantially reducing cost, it has also become important topic.
The content of the invention
(1) technical problem to be solved
The technical problem to be solved in the present invention is：How a kind of low-cost and high-precision rf attenuation device is provided.
(2) technical scheme
To solve above-mentioned technical problem, the present invention provides a kind of low-cost and high-precision rf attenuation device, and the radio frequency declines
Subtracting device includes：Radio-frequency (RF) switch, fixed attenuation are thrown positive the first hilted broadsword for arranging of the numerical-control attenuator that is sequentially connected, one-to-many more
Radio-frequency (RF) switch is thrown the second oppositely arranged hilted broadsword of device group and many-one more；
The numerical-control attenuator is the numerical-control attenuator that attenuation is 9dB, stepping is 1dB；
Throw first hilted broadsword more and throw radio-frequency (RF) switch radio-frequency (RF) switch and the second hilted broadsword more and adopt same size, switching channels number
It is identical；
The fixed attenuator group is made up of the coaxial fixed attentuator of the integer multiple that several pad values are 10dB；
To throw with the first hilted broadsword more and throw radio-frequency (RF) switch radio-frequency (RF) switch, the second hilted broadsword more in each coaxial fixed attentuator two ends
The channel connection of respective a certain determination；So as to, for each coaxial fixed attentuator, have one independent first
Throw hilted broadsword more and throw radio-frequency (RF) switch passage radio-frequency (RF) switch passage and a second independent hilted broadsword more and communicate therewith, and then constitute a-road-through
Road；
The numerical-control attenuator by its pad value of external control computer controls, as the unitss of final attenuation；
Radio-frequency (RF) switch is thrown the first hilted broadsword for being arranged at the fixed attenuator group two ends more and throwing radio frequency more with the second hilted broadsword and opened
Close by gating certain fixed attenuator as the high-value of final attenuation, so as to constitute any pad value.
Wherein, also include in the fixed attenuator group：Calibrated attenuator；
The pad value of the calibrated attenuator is zero, throws radio-frequency (RF) switch the first also independent with one respectively hilted broadsword of its two ends more
Throw radio-frequency (RF) switch channel connection more passage and a second independent hilted broadsword, constitute path all the way；The path is in the course of the work most
Whole attenuation only has the pad value of numerical-control attenuator embodying, should during the calibrated attenuator for entering to channel attenuation value
Row calibration；
In the fixed attenuator group, throwing the number sum and the first hilted broadsword of coaxial fixed attentuator and calibrated attenuator more
The switching channels number of radio-frequency (RF) switch is identical.
(3) beneficial effect
Compared with prior art, the present invention using throwing radio-frequency (RF) switch, fixed attenuator and numerical-control attenuator group hilted broadsword more
The mode of conjunction is effectively controlled multidigit numerical-control attenuator as pad value variation error increases controlling the change of attenuation
Problem, the program are provided simultaneously with low cost, control accurate advantage.
Description of the drawings
Principle schematics of the Fig. 1 for the embodiment of the present invention.
Specific embodiment
To make the purpose of the present invention, content and advantage clearer, with reference to the accompanying drawings and examples, to the present invention's
Specific embodiment is described in further detail.
To solve problem of the prior art, the present invention provides a kind of low-cost and high-precision rf attenuation device, the radio frequency
Attenuating device includes：Radio-frequency (RF) switch, fixation are thrown positive the first hilted broadsword for arranging of the numerical-control attenuator that is sequentially connected, one-to-many to decline more
Subtract and throw radio-frequency (RF) switch the second oppositely arranged hilted broadsword of device group and many-one more；
The numerical-control attenuator is the numerical-control attenuator that attenuation is 9dB, stepping is 1dB；
Throw first hilted broadsword more and throw radio-frequency (RF) switch radio-frequency (RF) switch and the second hilted broadsword more and adopt same size, switching channels number
It is identical；
The fixed attenuator group is made up of the coaxial fixed attentuator of the integer multiple that several pad values are 10dB；
To throw with the first hilted broadsword more and throw radio-frequency (RF) switch radio-frequency (RF) switch, the second hilted broadsword more in each coaxial fixed attentuator two ends
The channel connection of respective a certain determination；So as to, for each coaxial fixed attentuator, have one independent first
Throw hilted broadsword more and throw radio-frequency (RF) switch passage radio-frequency (RF) switch passage and a second independent hilted broadsword more and communicate therewith, and then constitute a-road-through
Road；
The numerical-control attenuator by its pad value of external control computer controls, as the unitss of final attenuation；
Radio-frequency (RF) switch is thrown the first hilted broadsword for being arranged at the fixed attenuator group two ends more and throwing radio frequency more with the second hilted broadsword and opened
Close by gating certain fixed attenuator as the high-value of final attenuation, so as to constitute any pad value.
Wherein, also include in the fixed attenuator group：Calibrated attenuator；
The pad value of the calibrated attenuator is zero, throws radio-frequency (RF) switch the first also independent with one respectively hilted broadsword of its two ends more
Throw radio-frequency (RF) switch channel connection more passage and a second independent hilted broadsword, constitute path all the way；The path is in the course of the work most
Whole attenuation only has the pad value of numerical-control attenuator embodying, should during the calibrated attenuator for channel attenuation value
Calibrated；
In the fixed attenuator group, throwing the number sum and the first hilted broadsword of coaxial fixed attentuator and calibrated attenuator more
The switching channels number of radio-frequency (RF) switch is identical.
Describe in detail with reference to specific embodiment.
Embodiment
The device of the present embodiment includes an attenuation for 9B, the numerical-control attenuator that stepping is 1dB；What two hilted broadswords eight were thrown
Radio-frequency (RF) switch；Coaxial fixed attentuator of seven pad values for the integer multiple of 10dB；One calibrated attenuator.
Value of the specific workflow for computer controls numerical-control attenuator, as the unitss of attenuation；Two radio frequencies are opened
The fixed attenuator of gating is closed as high-value, any pad value can be thus constituted.
Also, when two radio-frequency (RF) switch gating calibrated attenuators, final attenuation is only the pad value of numerical-control attenuator,
The brush depreciation of unitss is realized, the calibrated attenuator can be calibrated to channel attenuation value during being somebody's turn to do.
In general, the attenuating device shown in Fig. 1 is stepping 1dB, and pad value can reach 80dB.If necessary to bigger
Pad value, can increase the port number and bigger fixed attenuator pad value of switch.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, on the premise of without departing from the technology of the present invention principle, some improvement and deformation can also be made, these improve and deform
Also should be regarded as protection scope of the present invention.
Claims (2)
1. a kind of rf attenuation device, it is characterised in that the rf attenuation device includes：The numerical-control attenuator that is sequentially connected,
The second oppositely arranged hilted broadsword of radio-frequency (RF) switch, fixed attenuator group and many-one is thrown positive the first hilted broadsword for arranging of one-to-many more
Throw radio-frequency (RF) switch more；
The numerical-control attenuator is the numerical-control attenuator that attenuation is 9dB, stepping is 1dB；
Throw first hilted broadsword more and throw radio-frequency (RF) switch radio-frequency (RF) switch and the second hilted broadsword more and adopt same size, switching channels number phase
Together；
Coaxial fixed attentuator of the fixed attenuator group by several pad values for the integer multiple of 10dB is constituted；
To throw with the first hilted broadsword more and throw radio-frequency (RF) switch each radio-frequency (RF) switch, the second hilted broadsword more in each coaxial fixed attentuator two ends
A certain determination channel connection；So as to, for each coaxial fixed attentuator, have a first independent hilted broadsword
Throw more and throw radio-frequency (RF) switch passage radio-frequency (RF) switch passage and a second independent hilted broadsword more and communicate therewith, and then constitute path all the way；
The numerical-control attenuator by its pad value of external control computer controls, as the unitss of final attenuation；
Throw the first hilted broadsword for being arranged at the fixed attenuator group two ends more and throw radio-frequency (RF) switch radio-frequency (RF) switch and the second hilted broadsword more and lead to
Cross the high-value for certain fixed attenuator being gated as final attenuation, so as to constitute any pad value.
2. rf attenuation device as claimed in claim 1, it is characterised in that also include in the fixed attenuator group：Calibration
Attenuator；
The pad value of the calibrated attenuator is zero, throws radio-frequency (RF) switch passage the first also independent with one respectively hilted broadsword of its two ends more
And one throw radio-frequency (RF) switch channel connection the second independent hilted broadsword more, path all the way is constituted；The path finally declines in the course of the work
Decrement is embodied only by the pad value of numerical-control attenuator, should during the calibrated attenuator for carrying out school to channel attenuation value
It is accurate；
In the fixed attenuator group, the number sum and the first hilted broadsword of coaxial fixed attentuator and calibrated attenuator, throwing radio frequency more
The switching channels number of switch is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410610500.7A CN104393937B (en) | 2014-11-03 | 2014-11-03 | Radio frequency attenuation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410610500.7A CN104393937B (en) | 2014-11-03 | 2014-11-03 | Radio frequency attenuation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104393937A CN104393937A (en) | 2015-03-04 |
| CN104393937B true CN104393937B (en) | 2017-04-26 |
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ID=52611778
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410610500.7A Active CN104393937B (en) | 2014-11-03 | 2014-11-03 | Radio frequency attenuation device |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201352781Y (en) * | 2008-11-13 | 2009-11-25 | 武汉凡谷电子技术股份有限公司 | Programmable step attenuator |
| CN202094853U (en) * | 2011-04-28 | 2011-12-28 | 马飒飒 | High-dynamic and high-precision L-wave-band numerical control attenuator |
| CN203243295U (en) * | 2013-05-22 | 2013-10-16 | 中国电子科技集团公司第五十四研究所 | Pure numerical-controlled attenuation unit device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4654610A (en) * | 1985-07-23 | 1987-03-31 | Hewlett-Packard Company | PIN diode switched RF signal attenuator |
| CN102004242B (en) * | 2010-09-30 | 2012-09-26 | 中国船舶重工集团公司第七二三研究所 | Low-stray low-harmonic and high-dynamic signal generation method |
| CN103427780B (en) * | 2013-08-31 | 2016-01-20 | 西安电子科技大学 | Semi passive variable loss |
-
2014
- 2014-11-03 CN CN201410610500.7A patent/CN104393937B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201352781Y (en) * | 2008-11-13 | 2009-11-25 | 武汉凡谷电子技术股份有限公司 | Programmable step attenuator |
| CN202094853U (en) * | 2011-04-28 | 2011-12-28 | 马飒飒 | High-dynamic and high-precision L-wave-band numerical control attenuator |
| CN203243295U (en) * | 2013-05-22 | 2013-10-16 | 中国电子科技集团公司第五十四研究所 | Pure numerical-controlled attenuation unit device |
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| CN104393937A (en) | 2015-03-04 |
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Effective date of registration: 20180404 Address after: 300308 Tianjin District of Dongli City Airport Economic Zone bonded Road No. 357 Patentee after: TIANJIN JINHANG INSTITUTE OF COMPUTING TECHNOLOGY Address before: 300308 Tianjin District of Dongli City Airport Economic Zone bonded Road No. 357 Patentee before: NO.8357 Research Institute of the Third Academy of China Aerospace Science & Industry Corp. |
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