CN104393937A - Low-cost high-precision radio frequency attenuation device - Google Patents
Low-cost high-precision radio frequency attenuation device Download PDFInfo
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- CN104393937A CN104393937A CN201410610500.7A CN201410610500A CN104393937A CN 104393937 A CN104393937 A CN 104393937A CN 201410610500 A CN201410610500 A CN 201410610500A CN 104393937 A CN104393937 A CN 104393937A
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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, be specifically related to a kind of low-cost and high-precision rf attenuation device.
Background technology
Receiver sensitivity test needs to be reduced to space loss when certain value simulates telecommunication transmitting with attenuator.When producing receiver in batches, need Automatic Test Equipment.The accuracy of measuring accuracy to test result of the numerical-control attenuator in Automatic Test Equipment is extremely important.
PIN diode microwave numerical-control attenuator has bandwidth, standing wave is little, loss is low, respond the advantages such as fast, and the numerical-control attenuator majority of present domestic production is reflection-type PIN diode numerical-control attenuator, and when the situation that adjustable attenuation position is few, pad value is more accurate.The sensitivity limit value of receiver is most below-100dBm, so need multidigit numerical-control attenuator.Along with increasing of control bit, error is also increasing.
The multidigit numerical-control attenuator precision of present import is fine, but too expensive, a tens thousand of unit of price, therefore how greatly to reduce costs at guarantee measuring accuracy simultaneously, becomes important topic.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is: how to provide a kind of low-cost and high-precision rf attenuation device.
(2) technical scheme
For solving the problems of the technologies described above, the invention provides a kind of low-cost and high-precision rf attenuation device, described rf attenuation device comprises: the first hilted broadsword that the numerical-control attenuator connected successively, one-to-many forward are arranged is thrown the second hilted broadsword that radio-frequency (RF) switch, fixed attenuator group and many-one oppositely arrange more and thrown radio-frequency (RF) switch more;
Described numerical-control attenuator is attenuation is 9dB, stepping is the numerical-control attenuator of 1dB;
Described first hilted broadsword is thrown radio-frequency (RF) switch and the second hilted broadsword more and is thrown radio-frequency (RF) switch more and adopt same size, and switching channels number is identical;
The coaxial fixed attentuator that described fixed attenuator group is the integer multiple of 10dB by several pad values is formed;
Radio-frequency (RF) switch is all thrown with the first hilted broadsword in each coaxial fixed attentuator two ends more, the radio-frequency (RF) switch a certain channel connection determined separately thrown by the second hilted broadsword more; Thus, for each coaxial fixed attentuator, all have one independently the first hilted broadsword throw more radio-frequency (RF) switch passage and independently the second hilted broadsword throw radio-frequency (RF) switch passage more and be communicated with it, and then form a-road-through road;
Described numerical-control attenuator by its pad value of external control computer control, as the units of final attenuation;
Radio-frequency (RF) switch thrown by the first hilted broadsword being arranged at described fixed attenuator group two ends more and the second hilted broadsword throws radio-frequency (RF) switch by the high-value of certain fixed attenuator of gating as final attenuation more, thus forms any pad value.
Wherein, also comprise in described fixed attenuator group: calibrated attenuator;
The pad value of described calibrated attenuator is zero, its two ends also respectively with one independently the first hilted broadsword throw more radio-frequency (RF) switch passage and independently the second hilted broadsword throw radio-frequency (RF) switch channel connection more, form a-road-through road; This path in the course of the work final attenuation only has the pad value of numerical-control attenuator to embody, and calibrated attenuator described in this process is used for calibrating channel attenuation value;
In described fixed attenuator group, coaxial fixed attentuator is identical with the switching channels number that radio-frequency (RF) switch thrown by the first hilted broadsword more with the number sum of calibrated attenuator.
(3) beneficial effect
Compared with prior art, the present invention adopts hilted broadsword to throw the mode of radio-frequency (RF) switch, fixed attenuator and numerical-control attenuator combination to control the change of attenuation more, effectively control the problem that multidigit numerical-control attenuator increases along with pad value variation error, the program possess simultaneously cost low, control accurate advantage.
Accompanying drawing explanation
Fig. 1 is the principle schematic of the embodiment of the present invention.
Embodiment
For making object of the present invention, content and advantage clearly, below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.
For solving the problem of prior art, the invention provides a kind of low-cost and high-precision rf attenuation device, described rf attenuation device comprises: the first hilted broadsword that the numerical-control attenuator connected successively, one-to-many forward are arranged is thrown the second hilted broadsword that radio-frequency (RF) switch, fixed attenuator group and many-one oppositely arrange more and thrown radio-frequency (RF) switch more;
Described numerical-control attenuator is attenuation is 9dB, stepping is the numerical-control attenuator of 1dB;
Described first hilted broadsword is thrown radio-frequency (RF) switch and the second hilted broadsword more and is thrown radio-frequency (RF) switch more and adopt same size, and switching channels number is identical;
The coaxial fixed attentuator that described fixed attenuator group is the integer multiple of 10dB by several pad values is formed;
Radio-frequency (RF) switch is all thrown with the first hilted broadsword in each coaxial fixed attentuator two ends more, the radio-frequency (RF) switch a certain channel connection determined separately thrown by the second hilted broadsword more; Thus, for each coaxial fixed attentuator, all have one independently the first hilted broadsword throw more radio-frequency (RF) switch passage and independently the second hilted broadsword throw radio-frequency (RF) switch passage more and be communicated with it, and then form a-road-through road;
Described numerical-control attenuator by its pad value of external control computer control, as the units of final attenuation;
Radio-frequency (RF) switch thrown by the first hilted broadsword being arranged at described fixed attenuator group two ends more and the second hilted broadsword throws radio-frequency (RF) switch by the high-value of certain fixed attenuator of gating as final attenuation more, thus forms any pad value.
Wherein, also comprise in described fixed attenuator group: calibrated attenuator;
The pad value of described calibrated attenuator is zero, its two ends also respectively with one independently the first hilted broadsword throw more radio-frequency (RF) switch passage and independently the second hilted broadsword throw radio-frequency (RF) switch channel connection more, form a-road-through road; This path in the course of the work final attenuation only has the pad value of numerical-control attenuator to embody, and calibrated attenuator described in this process is used for calibrating channel attenuation value;
In described fixed attenuator group, coaxial fixed attentuator is identical with the switching channels number that radio-frequency (RF) switch thrown by the first hilted broadsword more with the number sum of calibrated attenuator.
Describe in detail below in conjunction with specific embodiment.
Embodiment
The device of the present embodiment comprises that an attenuation is 9B, stepping is the numerical-control attenuator of 1dB; The radio-frequency (RF) switch that two hilted broadswords eight are thrown; Seven pad values are the coaxial fixed attentuator of the integer multiple of 10dB; A calibrated attenuator.
Specific works flow process is the value of computer control numerical-control attenuator, as the units of attenuation; The fixed attenuator of two radio-frequency (RF) switch gatings, as high-value, so just can form any pad value.
Further, when two radio-frequency (RF) switch gating calibrated attenuators, final attenuation is only the pad value of numerical-control attenuator, realizes the brush depreciation of units, and calibrated attenuator described in this process can be calibrated channel attenuation value.
In general, the attenuating device shown in Fig. 1 is stepping 1dB, and pad value can reach 80dB.If need larger pad value, the port number of switch and larger fixed attenuator pad value can be increased.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and distortion, these improve and distortion also should be considered as protection scope of the present invention.
Claims (2)
1. a low-cost and high-precision rf attenuation device, it is characterized in that, described rf attenuation device comprises: the first hilted broadsword that the numerical-control attenuator connected successively, one-to-many forward are arranged is thrown the second hilted broadsword that radio-frequency (RF) switch, fixed attenuator group and many-one oppositely arrange more and thrown radio-frequency (RF) switch more;
Described numerical-control attenuator is attenuation is 9dB, stepping is the numerical-control attenuator of 1dB;
Described first hilted broadsword is thrown radio-frequency (RF) switch and the second hilted broadsword more and is thrown radio-frequency (RF) switch more and adopt same size, and switching channels number is identical;
The coaxial fixed attentuator that described fixed attenuator group is the integer multiple of 10dB by several pad values is formed;
Radio-frequency (RF) switch is all thrown with the first hilted broadsword in each coaxial fixed attentuator two ends more, the radio-frequency (RF) switch a certain channel connection determined separately thrown by the second hilted broadsword more; Thus, for each coaxial fixed attentuator, all have one independently the first hilted broadsword throw more radio-frequency (RF) switch passage and independently the second hilted broadsword throw radio-frequency (RF) switch passage more and be communicated with it, and then form a-road-through road;
Described numerical-control attenuator by its pad value of external control computer control, as the units of final attenuation;
Radio-frequency (RF) switch thrown by the first hilted broadsword being arranged at described fixed attenuator group two ends more and the second hilted broadsword throws radio-frequency (RF) switch by the high-value of certain fixed attenuator of gating as final attenuation more, thus forms any pad value.
2. low-cost and high-precision rf attenuation device as claimed in claim 1, is characterized in that, also comprise: calibrated attenuator in described fixed attenuator group;
The pad value of described calibrated attenuator is zero, its two ends also respectively with one independently the first hilted broadsword throw more radio-frequency (RF) switch passage and independently the second hilted broadsword throw radio-frequency (RF) switch channel connection more, form a-road-through road; This path in the course of the work final attenuation only has the pad value of numerical-control attenuator to embody, and calibrated attenuator described in this process is used for calibrating channel attenuation value;
In described fixed attenuator group, coaxial fixed attentuator is identical with the switching channels number that radio-frequency (RF) switch thrown by the first hilted broadsword more with the number sum of calibrated attenuator.
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 |
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| Publication Number | Publication Date |
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| CN104393937A true CN104393937A (en) | 2015-03-04 |
| CN104393937B CN104393937B (en) | 2017-04-26 |
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| CN201410610500.7A Active CN104393937B (en) | 2014-11-03 | 2014-11-03 | Radio frequency attenuation device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2532212B2 (en) * | 1985-07-23 | 1996-09-11 | ヒューレット・パッカード・カンパニー | Variable attenuator |
| 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 |
| CN102004242A (en) * | 2010-09-30 | 2011-04-06 | 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 |
| 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 |
| CN103427780A (en) * | 2013-08-31 | 2013-12-04 | 西安电子科技大学 | Semi-distributed passive variable attenuator |
-
2014
- 2014-11-03 CN CN201410610500.7A patent/CN104393937B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2532212B2 (en) * | 1985-07-23 | 1996-09-11 | ヒューレット・パッカード・カンパニー | Variable attenuator |
| 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 |
| CN102004242A (en) * | 2010-09-30 | 2011-04-06 | 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 |
| 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 |
| CN103427780A (en) * | 2013-08-31 | 2013-12-04 | 西安电子科技大学 | Semi-distributed passive variable attenuator |
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| CN104393937B (en) | 2017-04-26 |
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