CN103728542A - Forbidden band ultra-high-frequency sensor used for spatial orientation of discharging source of transformer substation - Google Patents
Forbidden band ultra-high-frequency sensor used for spatial orientation of discharging source of transformer substation Download PDFInfo
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- CN103728542A CN103728542A CN201410001182.4A CN201410001182A CN103728542A CN 103728542 A CN103728542 A CN 103728542A CN 201410001182 A CN201410001182 A CN 201410001182A CN 103728542 A CN103728542 A CN 103728542A
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Abstract
The invention discloses a forbidden band ultra-high-frequency sensor used for spatial orientation of a discharging source of a transformer substation. The forbidden band ultra-high-frequency sensor used for spatial orientation of the discharging source of the transformer substation comprises an insulating substrate, a metal patch with a trapped wave unit, a metal grounding patch and a connector, wherein the metal patch with the trapped wave unit is attached to one side face of the insulating substrate and is provided with a micro-strip feeder line, the micro-strip feeder line is a long stretching-out part which stretches outwards from the metal patch, the long stretching-out part becomes narrower gradually from the position where the long stretching-out part stretches outwards of the metal patch, two hollowed-out grooves are further formed in the metal patch with the trapped wave unit, a gap exists between the head end and the tail end of the extension trajectory of each hollowed-out groove, the lengths of the extension trajectories of the two hollowed-out grooves are half the wave length corresponding to a first frequency band range and half the wave length corresponding to a second frequency band range respectively, the metal grounding patch is attached to the other side face of the insulating substrate, and the connector is connected with the micro-strip feeder line. The forbidden band ultra-high-frequency sensor used for spatial orientation of the discharging source of the transformer substation is omnidirectional approximately and capable of restraining an interference signal, within a specific frequency band, serving as an interference source easily, conveniently and effectively.
Description
Technical field
The present invention relates to a kind of superfrequency sensor, relate in particular to a kind of forbidden band superfrequency sensor.
Background technology
Superfrequency (ultra high frequency, UHF) method with its wide coverage, highly sensitive, can identify and the advantage such as orientation discharge source, become recent two decades emphasis and the focus of Partial Discharge Detection area research both at home and abroad.By superfrequency sensor composition sensor array, receive the ultrahigh-frequency signal that transformer station's discharge source excites, and realize detection and the space orientation of discharge source in whole transformer station, the method is compared with charged checkout equipment with current on-line monitoring, structure is simplified greatly, take full advantage of that superfrequency sensitivity is high, the advantage of wide coverage, when meeting repair based on condition of component job requirement, aspect economy, there is obvious advantage.At present domesticly started relevant research work, and made some progress.
Successfully realizing the sterically defined key of discharge source is superfrequency sensor.For the sterically defined sensor of transformer station's shelf depreciation, mostly be wide frequency antenna at present, bandwidth is generally 300MHz-3000MHz, this frequency range has comprised 880MHz-960MHz and the 1710MHz-1850MHz of mobile communication frequency range, the signal power of these two frequency ranges is higher, for shelf depreciation positioning system, be a more intense interference source, therefore, the undesired signal that suppresses this interference source becomes letter problem to be solved how simple and effectively.
Summary of the invention
The object of the present invention is to provide a kind of for the sterically defined forbidden band of transformer station's discharge source superfrequency sensor, this sensor is in the wide characteristic with approximate omnidirectional of working band, and can suppress the undesired signal as the special frequency channel of interference source simple and effectively, thereby effectively reduce the impact of undesired signal on transformer station's discharge source space positioning system accuracy, improve the accuracy of transformer station's discharge source space positioning system.
To achieve these goals, the present invention proposes one for the sterically defined forbidden band of transformer station's discharge source superfrequency sensor, comprising:
One insulated substrate;
One metal patch with trap wave unit, it is sticked on a side of described insulated substrate; The described metal patch with trap wave unit has a microstrip feed line, this microstrip feed line is from the outwardly directed microscler extension of metal patch, the width of this microscler extension narrows from outwards stretching out of metal patch gradually from it, on the described metal patch with trap wave unit, also offer two hollow slots, between the head end of the extension track of this hollow slots and tail end, have gap, the length of the extension track of described two hollow slots is respectively the half of one first band limits centre frequency and the corresponding wavelength of one second band limits centre frequency;
One metal ground patch, it is sticked on another side of described insulated substrate;
One joint, it is connected with described microstrip feed line.
Of the present invention for the sterically defined forbidden band of transformer station's discharge source superfrequency sensor owing to having adopted insulated substrate, metal patch and described metal ground patch with trap wave unit to form monopole antenna structure, guaranteed omni-directional, broadband, low-loss, stability group time delay and the high sensitivity of sensor.The radiating element of sensor (is the described metal patch with trap wave unit simultaneously, the signal receiving unit of sensor) on introduced two notching constructions, make sensor there is trap function (forbidden band function), suppress the undesired signal as the special frequency channel of interference source.The slotting length of described notching construction, equals the half as the frequency range centre frequency corresponding wavelength of the special frequency channel of interference source, becomes " half-wavelength resonance structure ", thereby utilizes resonance principle effectively to suppress the undesired signal as the special frequency channel of interference source.The material of described insulated substrate can be the insulating material of specific inductive capacity between 2 to 6.The described metal patch with trap wave unit receives ultrahigh-frequency signal, by described microstrip feed line and the output of described joint.
Further, in the superfrequency sensor of forbidden band of the present invention, described the first band limits is 880-960MHz.
In such scheme, on the described metal patch with trap wave unit, introduce a half-wavelength resonance structure, it is the gapped hollow slots of tool between the length being opened on the described metal patch with the trap wave unit head end that is the half of 900MHz institute corresponding wavelength and tail end, increase the energy loss of 880MHz-960MHz frequency band signals in sensor, reduce the interference of this frequency band signals to positioning system, effectively improve the accuracy of positioning system.
Further, in the superfrequency sensor of forbidden band of the present invention, described the second band limits is 1710-1850MHz.
In such scheme, on the described metal patch with trap wave unit, introduce a half-wavelength resonance structure, it is the gapped hollow slots of tool between the length being opened on the described metal patch with the trap wave unit head end that is the half of 1800MHz institute corresponding wavelength and tail end, increase the energy loss of 1710MHz-1850MHz frequency band signals in sensor, reduce the interference of this frequency band signals to positioning system, effectively improve the accuracy of positioning system.
Further, forbidden band of the present invention superfrequency sensor also comprises: a metab, and described insulated substrate is fixedly installed on described metab, and described joint is connected with microstrip feed line by the through hole on metab.
Further, in the superfrequency sensor of above-mentioned forbidden band, described insulated substrate is fixedly installed on described metab by insulation fixing plate and L-type metal fixed head, one end of described L-type metal fixed head is fixedly connected with metab, the other end of described L-type metal fixed head is fixedly connected with insulated substrate with insulation fixing plate, described insulation fixing plate and the homonymy that is arranged on insulated substrate with the metal patch of trap wave unit, described L-type metal fixed head and metal ground patch are arranged on the homonymy of insulated substrate.
In such scheme, described insulation fixing plate can be rectangle, and described metab can be circular; Described metab is that the each parts of sensor provide support; Described insulation fixing plate is that described insulated substrate provides support; Described metal fixed head is that described insulated substrate provides support.
Preferably, in the superfrequency sensor of forbidden band of the present invention, described hollow slots is near microstrip feed line setting.
In such scheme, described hollow slots also can be near microstrip feed line setting, but forbidden band effect outline is poor.
Preferably, in the superfrequency sensor of forbidden band of the present invention, the described metal patch with trap wave unit is oval.
Alternatively, in the superfrequency sensor of forbidden band of the present invention, described metal ground patch is half elliptic or rectangle.
Preferably, in the superfrequency sensor of forbidden band of the present invention, the extension track of described hollow slots is oval.
In such scheme, the extension track of described hollow slots is preferably oval, can be also other shape.
Preferably, in the superfrequency sensor of forbidden band of the present invention, described joint is N connector.
In such scheme, described N connector characteristic impedance can be 50 ohm, and its feedback pin is connected with the microstrip feed line of the described metal patch with trap wave unit, for sensor and being connected of subsequent detection device provide interface.
Of the present invention for the sterically defined forbidden band of transformer station's discharge source superfrequency sensor owing to having adopted monopole antenna structure, in the wide characteristic with approximate omnidirectional of working band, and owing to having introduced two notching constructions on its radiating element, make sensor there is trap function (forbidden band function), can suppress the undesired signal as the special frequency channel of interference source simple and effectively, thereby effectively reduce the impact of undesired signal on transformer station's discharge source space positioning system accuracy, improve the accuracy of transformer station's discharge source space positioning system.
Accompanying drawing explanation
Fig. 1 be of the present invention for the sterically defined forbidden band of transformer station's discharge source superfrequency sensor the Facad structure schematic diagram under a kind of embodiment.
Fig. 2 be of the present invention for the sterically defined forbidden band of transformer station's discharge source superfrequency sensor the structure schematic diagram under a kind of embodiment.
Fig. 3 be of the present invention for the sterically defined forbidden band of transformer station's discharge source superfrequency sensor the metal patch structural representation with trap wave unit under a kind of embodiment.
Fig. 4 be of the present invention for the sterically defined forbidden band of transformer station's discharge source superfrequency sensor the metal ground patch structural representation under a kind of embodiment.
Fig. 5 be of the present invention for the sterically defined forbidden band of transformer station's discharge source superfrequency sensor reflection coefficient (S11) curve map under a kind of embodiment.
Fig. 6 be with of the present invention for the sterically defined forbidden band of transformer station's discharge source superfrequency sensor the identical but reflection coefficient with trap wave unit (S11) curve map not of the physical dimension under a kind of embodiment.
Embodiment
Below in conjunction with Figure of description and specific embodiment, to of the present invention, for the sterically defined forbidden band of transformer station's discharge source superfrequency sensor, make further explanation and explanation.
Fig. 1 has illustrated the Facad structure of forbidden band of the present invention superfrequency sensor under a kind of embodiment.Fig. 2 has illustrated the structure of forbidden band of the present invention superfrequency sensor under a kind of embodiment.Fig. 3 has illustrated the metal patch structure with trap wave unit of forbidden band of the present invention superfrequency sensor under a kind of embodiment.Fig. 4 has illustrated the metal ground patch structure of forbidden band of the present invention superfrequency sensor under a kind of embodiment.
As shown in Fig. 1～4, the present embodiment comprises: the insulated substrate 2 that the insulating material of a use specific inductive capacity between 2 to 6 made, the metal patch 1 of one ellipse with trap wave unit, it is sticked on a side of insulated substrate 2, metal patch 1 with trap wave unit has a microstrip feed line 11, this microstrip feed line 11 is from the outwardly directed microscler extension of metal patch 1, the width of this microscler extension narrows from outwards stretching out of metal patch 1 gradually from it, on metal patch 1 with trap wave unit, also offer two oval hollow slots A that arrange near microstrip feed line 11, between the head end of the extension track of this hollow slots A and tail end, there is gap B, the length of the extension track of two hollow slots A is respectively the half of the corresponding wavelength of centre frequency 900MHz of one first band limits 880-960MHz, half with the corresponding wavelength of centre frequency 1800MHz of one second band limits 1710-1850MHz, one half elliptic metal ground patch 6, it is sticked on another side of insulated substrate 2, one rectangle insulation fixing plate 3, one L-type metal fixed head 7 and a circular metal base 4, insulated substrate 2 is fixedly installed on metab 4 by insulation fixing plate 3 and L-type metal fixed head 7 use metal screws, one end of L-type metal fixed head 7 is fixedly connected with metab 4 use metal screws, the other end of L-type metal fixed head 7 is fixedly connected with insulated substrate 2 use metal screws with insulation fixing plate 3, insulation fixing plate 3 and the metal patch 1 with trap wave unit are arranged on the homonymy of insulated substrate 2, L-type metal fixed head 7 and metal ground patch 6 are arranged on the homonymy of insulated substrate 2, one characteristic impedance is the N connector 5 of 50 ohm, is screwed in the bottom of metab 4, and by the through hole on metab 4, its feedback pin and microstrip feed line 11 weld, for sensor and being connected of subsequent detection device provide interface.
Fig. 5 is reflection coefficient (S11) curve map of forbidden band of the present invention superfrequency sensor under a kind of embodiment.Fig. 6 is identical with the physical dimension of forbidden band of the present invention superfrequency sensor under a kind of embodiment but the reflection coefficient with trap wave unit (S11) curve map not.
Adoption Network analyser respectively to the forbidden band superfrequency sensor of the present embodiment with identical with the present embodiment physical dimension but do not test with the superfrequency sensor of trap wave unit, can obtain reflection coefficient (S11) curve as shown in Figure 5 and Figure 6.By Fig. 5 and Fig. 6 contrast, can be seen, the forbidden band superfrequency sensor of introducing the present embodiment of trap structure has two obvious trap bands near 900MHz and 1.8GHz, can effectively suppress mobile phone Communication Jamming, thereby effectively reduce the impact of mobile communication undesired signal on transformer station's discharge source space positioning system accuracy, improve the accuracy of transformer station's discharge source space positioning system.
Be noted that above enumerate only for specific embodiments of the invention, obviously the invention is not restricted to above embodiment, have many similar variations thereupon.If all distortion that those skilled in the art directly derives or associates from content disclosed by the invention, all should belong to protection scope of the present invention.
Claims (10)
1. for the sterically defined forbidden band of a transformer station's discharge source superfrequency sensor, it is characterized in that, comprising:
One insulated substrate;
One metal patch with trap wave unit, it is sticked on a side of described insulated substrate; The described metal patch with trap wave unit has a microstrip feed line, this microstrip feed line is from the outwardly directed microscler extension of metal patch, the width of this microscler extension narrows from outwards stretching out of metal patch gradually from it, on the described metal patch with trap wave unit, also offer two hollow slots, between the head end of the extension track of this hollow slots and tail end, have gap, the length of the extension track of described two hollow slots is respectively the half of one first band limits centre frequency and the corresponding wavelength of one second band limits centre frequency;
One metal ground patch, it is sticked on another side of described insulated substrate;
One joint, it is connected with described microstrip feed line.
2. forbidden band as claimed in claim 1 superfrequency sensor, is characterized in that, described the first band limits is 880-960MHz.
3. forbidden band as claimed in claim 1 superfrequency sensor, is characterized in that, described the second band limits is 1710-1850MHz.
4. forbidden band as claimed in claim 1 superfrequency sensor, is characterized in that, also comprises: a metab, and described insulated substrate is fixedly installed on described metab, and described joint is connected with microstrip feed line by the through hole on metab.
5. forbidden band as claimed in claim 4 superfrequency sensor, it is characterized in that, described insulated substrate is fixedly installed on described metab by insulation fixing plate and L-type metal fixed head, one end of described L-type metal fixed head is fixedly connected with metab, the other end of described L-type metal fixed head is fixedly connected with insulated substrate with insulation fixing plate, described insulation fixing plate and the homonymy that is arranged on insulated substrate with the metal patch of trap wave unit, described L-type metal fixed head and metal ground patch are arranged on the homonymy of insulated substrate.
6. forbidden band as claimed in claim 1 superfrequency sensor, is characterized in that, described hollow slots is near microstrip feed line setting.
7. forbidden band as claimed in claim 1 superfrequency sensor, is characterized in that, the described metal patch with trap wave unit is oval.
8. forbidden band as claimed in claim 1 superfrequency sensor, is characterized in that, described metal ground patch is half elliptic or rectangle.
9. forbidden band as claimed in claim 1 superfrequency sensor, is characterized in that, the extension track of described hollow slots is oval.
10. forbidden band as claimed in claim 1 superfrequency sensor, is characterized in that, described joint is N connector.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410001182.4A CN103728542A (en) | 2014-01-02 | 2014-01-02 | Forbidden band ultra-high-frequency sensor used for spatial orientation of discharging source of transformer substation |
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| CN201410001182.4A CN103728542A (en) | 2014-01-02 | 2014-01-02 | Forbidden band ultra-high-frequency sensor used for spatial orientation of discharging source of transformer substation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105301378A (en) * | 2014-07-08 | 2016-02-03 | 苏州普源精电科技有限公司 | RF measurement apparatus having microstrip line adjustable capacitor and microstrip line adjustable capacitor |
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| CN101888016A (en) * | 2010-06-21 | 2010-11-17 | 哈尔滨工程大学 | Ultra wide band antenna with trap characteristic |
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| CN102723601A (en) * | 2012-06-19 | 2012-10-10 | 北京航空航天大学 | Ultra-wide-band dual-notch paster antenna adopting wide-attenuation-band electromagnetic band gap structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105301378A (en) * | 2014-07-08 | 2016-02-03 | 苏州普源精电科技有限公司 | RF measurement apparatus having microstrip line adjustable capacitor and microstrip line adjustable capacitor |
| CN105301378B (en) * | 2014-07-08 | 2019-02-01 | 苏州普源精电科技有限公司 | Radio-frequency measurement device and microstrip line tunable capacitor with microstrip line tunable capacitor |
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Application publication date: 20140416 |