CN112701463A - Combined antenna structure based on circular and rectangular spirals - Google Patents
Combined antenna structure based on circular and rectangular spirals Download PDFInfo
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- CN112701463A CN112701463A CN202011503120.5A CN202011503120A CN112701463A CN 112701463 A CN112701463 A CN 112701463A CN 202011503120 A CN202011503120 A CN 202011503120A CN 112701463 A CN112701463 A CN 112701463A
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- 238000005516 engineering process Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 17
- 230000005540 biological transmission Effects 0.000 description 7
- 230000005855 radiation Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000012212 insulator Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
- H01Q9/26—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength
- H01Q9/27—Spiral antennas
Abstract
The invention relates to a combined antenna structure based on circular and rectangular spirals, and belongs to the technical field of antennas. This antenna structure is based on circular helical antenna and rectangle helical antenna structure, regards circular helical curve as antenna inner loop structure, rectangle helical curve as antenna outer loop structure, has formed a neotype antenna structure, and this antenna passes through printed circuit board PCB and realizes, can easily realize the detection to the electromagnetic wave that corona discharge broadband distributes, and the size structure of antenna is less simultaneously, and the quality is lighter, makes things convenient for the staff to carry the field usage.
Description
Technical Field
The invention belongs to the technical field of antennas, and relates to a combined antenna structure based on circular and rectangular spirals.
Background
In an overhead line, if a line and an insulator hardware are in poor contact, the surface of an insulator is dirty, the insulator is aged or the line is stranded, the local electric field at the part is unevenly distributed, and the phenomenon of corona discharge is easy to occur. The generation of corona discharge not only can consume electric energy, but also can generate electromagnetic wave interference, and the electromagnetic wave interference can cause interference to signals such as radio communication, frequency modulation broadcasting and the like; meanwhile, corrosive gases of ozone and nitrogen oxides can be generated to further corrode a high-voltage transmission line and other equipment to bring potential safety hazards, so that timely and accurate detection of the corona discharge phenomenon plays a crucial role in normal operation of a power system, and is helpful for a power department to find faults in time, avoid safety accidents and generate great economic loss.
The corona discharge is accompanied by electromagnetic wave radiation of a specific frequency band, so that the use of an antenna of the corona discharge frequency band for detecting the corona discharge is an effective detection method. With the continuous development and popularization of electromagnetic wave detection methods for detecting corona discharge by using antennas, more strict requirements are imposed on the size and performance of the antennas. The size of the antenna needs to be minimized as much as possible, so that the unmanned aerial vehicle carrying antenna can be used for detection, and the detection work is more convenient and easy to carry; the coverage rate of the return loss frequency band and the corona discharge frequency band of the antenna is higher, the performance of the antenna is better, and therefore the antenna can measure a corona discharge signal with a better signal-to-noise ratio.
Disclosure of Invention
In view of the above, the present invention provides a combined antenna structure based on circular and rectangular spirals.
In order to achieve the purpose, the invention provides the following technical scheme:
a combined antenna structure based on circular and rectangular spirals comprises a circular spiral antenna, a rectangular spiral antenna and a feed position;
the circular spiral antenna takes the feed position as a starting point, a circle is drawn from inside to outside according to increasing radiuses, and the circular spiral antenna is converted into a rectangular spiral antenna in the sixth turn.
Optionally, the rectangular spiral antenna extends along a straight line according to a fixed unit length, then rotates clockwise by 90 ° in the extending direction, and continues to extend along a straight line according to a unit length;
and increasing the extension length of the antenna by one unit length every two times of extension to form a combined antenna structure based on the circular and rectangular spirals.
Optionally, a connecting line is led out from the centers of the two oscillators, and the antenna structure is excited in a center feeding mode;
the antenna structure is printed in the circuit board by adopting a Printed Circuit Board (PCB) technology, thereby realizing the structure of the antenna.
The invention has the beneficial effects that:
(1) a circular spiral curve is used as an antenna inner ring structure, and a rectangular spiral curve is used as an antenna outer ring structure, so that a novel combined antenna structure is formed;
(2) the novel antenna has the characteristics of wide frequency band and small size, is applied to the detection of corona discharge of a high-voltage transmission line, and is beneficial to quickly judging the occurrence of discharge faults.
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. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
figure 1 is a combined antenna structure based on circular and rectangular spirals;
FIG. 2 is a schematic diagram of return loss of an antenna;
fig. 3 is an antenna radiation gain pattern.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
The corona discharge detection antenna of the power transmission line adopts the most common spiral antenna structure: the antenna comprises a circular spiral antenna and a rectangular spiral coil, wherein the circular spiral coil is used as an inner ring structure of the antenna, and the rectangular spiral coil is used as an outer ring structure of the antenna. The spiral coil has the characteristics of simple structure and high space utilization rate.
The structure of the whole antenna is shown in fig. 1. As can be seen from fig. 1, the circular helical antenna of the inner loop starts from the center of the helix, and draws a circle with increasing radius, and in the sixth turn, the circular helical antenna of the inner loop is converted into the rectangular helical antenna of the outer loop, and extends along a straight line according to a fixed unit length, then rotates clockwise by 90 ° in the extending direction, and continues to extend along a straight line according to a unit length. The extension length of the antenna is increased by one unit length after every two extensions, thereby forming the combined antenna structure based on the circular and rectangular spirals. And connecting wires are led out from the centers of the two oscillators, and the antenna is excited in a center feeding mode. The thickness of the conductor section of the antenna is small, the mechanical strength is small and is not enough to maintain the structure, and the antenna is easy to deform to influence the performance of the antenna, so that the antenna is printed in a circuit board by adopting the printed circuit board technology (PCB), and the structure of the antenna is realized. The antenna is subjected to simulation analysis, and the return loss schematic diagram of the antenna shown in fig. 2 and the radiation gain directional diagram of the antenna shown in fig. 3 are obtained. The return loss diagram shows that the return loss energy of the central frequency of the antenna reaches below minus 30dB, and the bandwidth reaching below minus 10dB can realize the bandwidth of about 120MHz and has broadband characteristics. The radiation gain pattern of the antenna shows that the gain of the antenna can reach 4dB in the vertical direction, and the directivity of the antenna is good and has no side lobe. In conclusion, the antenna is novel in structure, good in performance and easy to detect corona discharge of the power transmission line.
The antenna is used for realizing the detection of the corona discharge of the high-voltage transmission line. When corona discharge occurs in a high-voltage transmission line, electromagnetic wave radiation is generated, the frequency of the radiated electromagnetic wave is mainly distributed in a relatively wide frequency band below 1GHz, and therefore the detection frequency band of the antenna needs to be consistent with the frequency band of the corona discharge electromagnetic wave. Because the height of the high-voltage overhead transmission line is high, workers carry the detection device to climb the tower for detection, so that great safety risks exist, and the detection method is mostly used for carrying out remote detection on the ground. Besides the requirements of detection frequency band and size, the antenna is also required to have the characteristics of good directivity and high gain, and the sensitivity of corona discharge detection and the discharge positioning function are improved. The invention provides a novel combined antenna structure based on circular and rectangular spirals, the design of a small-size antenna for corona discharge detection is completed, and meanwhile, the antenna is in a centrosymmetric structure and is easy to realize good directivity and high gain.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (3)
1. A combined antenna structure based on circular and rectangular spirals, characterized in that: the antenna comprises a circular spiral antenna, a rectangular spiral antenna and a feeding position;
the circular spiral antenna takes the feed position as a starting point, a circle is drawn from inside to outside according to increasing radiuses, and the circular spiral antenna is converted into a rectangular spiral antenna in the sixth turn.
2. A combined circular and rectangular spiral-based antenna structure according to claim 1, characterized in that: the rectangular spiral antenna extends along a straight line according to a fixed unit length, then rotates 90 degrees clockwise in the extending direction, and continues to extend along the straight line according to the unit length;
and increasing the extension length of the antenna by one unit length every two times of extension to form a combined antenna structure based on the circular and rectangular spirals.
3. A combined circular and rectangular spiral-based antenna structure according to claim 1, characterized in that: leading out a connecting wire from the centers of the two oscillators, and exciting the antenna structure in a center feeding mode;
the antenna structure is printed in the circuit board by adopting a Printed Circuit Board (PCB) technology, thereby realizing the structure of the antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011503120.5A CN112701463A (en) | 2020-12-17 | 2020-12-17 | Combined antenna structure based on circular and rectangular spirals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011503120.5A CN112701463A (en) | 2020-12-17 | 2020-12-17 | Combined antenna structure based on circular and rectangular spirals |
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| Publication Number | Publication Date |
|---|---|
| CN112701463A true CN112701463A (en) | 2021-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011503120.5A Pending CN112701463A (en) | 2020-12-17 | 2020-12-17 | Combined antenna structure based on circular and rectangular spirals |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5451973A (en) * | 1993-11-02 | 1995-09-19 | Trw Inc. | Multi-mode dual circularly polarized spiral antenna |
| US20030076274A1 (en) * | 2001-07-23 | 2003-04-24 | Phelan Harry Richard | Antenna arrays formed of spiral sub-array lattices |
| KR20100006949A (en) * | 2008-07-11 | 2010-01-22 | 주식회사 이엠따블유 | Spiral antenna for near field rfid application |
| CN203300794U (en) * | 2013-05-07 | 2013-11-20 | 广东电网公司电力科学研究院 | Low-profile single-arm Archimedes helical antenna without Balun |
| US20140300526A1 (en) * | 2011-12-23 | 2014-10-09 | Nahid Rahman | System, method and apparatus including hybrid spiral antenna |
| CN106324446A (en) * | 2015-07-06 | 2017-01-11 | 国家电网公司 | External ultra-high-frequency sensor for detecting partial discharge of gas insulated switchgear (GIS) |
| CN206180106U (en) * | 2016-11-28 | 2017-05-17 | 重庆智能水表集团有限公司 | Miniaturized spiral microstrip antenna |
| CN107611594A (en) * | 2017-07-14 | 2018-01-19 | 电子科技大学 | A kind of new Archimedian screw directional aerial |
-
2020
- 2020-12-17 CN CN202011503120.5A patent/CN112701463A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5451973A (en) * | 1993-11-02 | 1995-09-19 | Trw Inc. | Multi-mode dual circularly polarized spiral antenna |
| US20030076274A1 (en) * | 2001-07-23 | 2003-04-24 | Phelan Harry Richard | Antenna arrays formed of spiral sub-array lattices |
| KR20100006949A (en) * | 2008-07-11 | 2010-01-22 | 주식회사 이엠따블유 | Spiral antenna for near field rfid application |
| US20140300526A1 (en) * | 2011-12-23 | 2014-10-09 | Nahid Rahman | System, method and apparatus including hybrid spiral antenna |
| CN203300794U (en) * | 2013-05-07 | 2013-11-20 | 广东电网公司电力科学研究院 | Low-profile single-arm Archimedes helical antenna without Balun |
| CN106324446A (en) * | 2015-07-06 | 2017-01-11 | 国家电网公司 | External ultra-high-frequency sensor for detecting partial discharge of gas insulated switchgear (GIS) |
| CN206180106U (en) * | 2016-11-28 | 2017-05-17 | 重庆智能水表集团有限公司 | Miniaturized spiral microstrip antenna |
| CN107611594A (en) * | 2017-07-14 | 2018-01-19 | 电子科技大学 | A kind of new Archimedian screw directional aerial |
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Application publication date: 20210423 |