CN114498037A - High-sensitivity omnidirectional magnetic antenna combination method - Google Patents
High-sensitivity omnidirectional magnetic antenna combination method Download PDFInfo
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- CN114498037A CN114498037A CN202210122458.9A CN202210122458A CN114498037A CN 114498037 A CN114498037 A CN 114498037A CN 202210122458 A CN202210122458 A CN 202210122458A CN 114498037 A CN114498037 A CN 114498037A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
- H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material
- H01Q7/08—Ferrite rod or like elongated core
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/06—Coil winding
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- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention discloses a high-sensitivity omnidirectional magnetic antenna combination method, which particularly relates to the field of antennas and specifically comprises the following steps: s1, winding a coil; s2, arranging magnetic rods; s3, angle adjustment; s4, the combination is completed, the magnetic bar and the coil can be combined in different ways to form different antenna combinations according to requirements, wherein, the coil on a single magnetic bar is wound into two groups, when the distance between the two groups of coils is longer, the distance between the two groups of coils is at least more than 3-5 cm, the mutual inductance between the two sections can be ignored, at the moment, the inductance of each section of winding can be taken as L/2, the number of turns is 0.7n, and the total number of turns of the coil winding of the antenna is increased to 1.4n, thereby improving the induced signal voltage on the coil.
Description
Technical Field
The invention relates to the field of antennas, in particular to a high-sensitivity omnidirectional magnetic antenna combination method.
Background
With the progress of times, the urbanization of China is continuously developed and built. The surface space cannot meet the civil pipeline construction requirements of electric power, environmental sanitation, tap water, gas, communication and the like, and meanwhile, the related communication pipelines of the national security unit are more and more complicated to construct;
in communication engineering, the magnetic antenna of received signal is indispensable, and current product sensitivity is not high and intelligent degree is on the low side, and the product can't carry out the modularization equipment, and the testing process exists inefficiency, the measuring accuracy is low, the false positive rate is high, test inspection standard is inconsistent and test subjectivity height is high shortcoming, can't accord with quick, accurate, efficient to survey.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a high-sensitivity omni-directional magnetic antenna combination method.
In order to achieve the purpose, the invention adopts the following technical scheme:
the high-sensitivity omnidirectional magnetic antenna combination method specifically comprises the following steps:
s1, winding of coils: the winding mode of the coil adopts a sectional layered close winding mode, and the coil is wound in the middle of the magnetic bar;
s2, arrangement of magnetic rods: after the coil is wound, the magnetic rods are arranged in an end-to-end connection mode;
s3, angle adjustment: adjusting the angle between the magnetic rods according to the magnetic flux;
and S4, finishing the combination.
Preferably, in the winding process of the coil in step S1, n represents the number of turns of the coil, e represents induced electromotive force, and voltage appearing between the two ends under a non-resonant condition is calculated by the following relation:
preferably, in step S3, the angle adjustment of the magnetic rod is adjusted according to a total magnetic flux passing through the loop antenna, and the total magnetic flux passing through the loop antenna is calculated by the following formula: and phi is BAcos phi, B is the magnetic flux density, A is the effective area of the loop antenna, and phi is the included angle between the magnetic flux lines and the axis of the loop antenna.
Preferably, in step S3, when the loop antenna is placed at a position where electromagnetic waves pass and the magnetic flux density changes sinusoidally, the voltage induced by the carrier wave can be given by the following equation: v2 pi fBancos phi, V is the induced voltage, f is the carrier frequency, n is the number of coil turns, and B is the magnetic flux density.
Preferably, the calculation formula of the magnetic flux in step S3 is specifically: b ═ μ H, B the permeability of the medium, H the magnetic field strength, and for a free space or a medium with μ ═ μ 0, the formula for the calculation of the magnetic flux is: v8 pi 10-7fHAncosφ。
Preference is given toIn step S3, the effective area calculation formula of the loop antenna is specifically: a ═ AIn factμ`，APractice ofThe area enclosed by the coil is denoted by μ', and the relative permeability is denoted by μ ═ μ/μ 0, and the voltage calculation formula of the coil of the magnetic antenna is specifically as follows: v8 pi 10-7μ`fHANCOSφ。
The invention has the beneficial effects that:
the magnetic rod and the coil can be combined in different ways, so that different antenna combinations can be formed according to the requirements, wherein, the coils on the single magnetic bar are wound into two groups, when the distance between the two groups of coils is longer, the distance between the two is at least 3-5 cm, the mutual inductance between the two sections can be ignored, at this time, the inductance of each section of winding is L/2, the number of turns is 0.7n, which is equivalent to that the total number of turns of the antenna coil winding is increased to 1.4n, so that the induced signal voltage on the coil is improved, the more the number of turns of the coil is, the stronger the receiving capacity is, the higher the total voltage induced by the coil is, the dense distribution of the magnetic lines of force of the electromagnetic wave transmitted by the transmitting station in the sky is, the larger the section of the coil is, the more the coil contains, the larger the voltage induced by the coil is, and the higher the sensitivity is.
Drawings
Fig. 1 is a structural diagram of a loop magnetic antenna assembly formed by four magnetic rods connected end to end in the invention.
Fig. 2 is a front view of a loop magnetic antenna assembly formed by four magnetic rods connected end to end in the invention.
Fig. 3 is a structural diagram of a magnetic antenna assembly formed by parallel bonding of three magnetic rods with different diameters in the present invention.
FIG. 4 is a diagram of a magnetic antenna assembly formed by two parallel magnetic rods connected in series according to the present invention;
FIG. 5 is a diagram of a magnetic antenna formed by a combination of single-rod antennas according to the present invention;
FIG. 6 is a schematic diagram of a magnetic antenna according to the present invention;
FIG. 7 is a field component diagram of the magnetic antenna of the present invention;
reference numerals:
1. a magnetic bar; 2. and a coil.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1
As shown in fig. 1, fig. 2, fig. 6 and fig. 7, the method for combining a high-sensitivity omni-directional magnetic antenna specifically includes the following steps:
s1, winding of coil 2: the winding mode of the coil 2 adopts a sectional layered close winding mode, and the coil 2 is wound in the middle of the magnetic bar 1;
s2, arrangement of the magnetic rods 1: after the coil 2 is wound, the magnetic rods 1 are arranged in an end-to-end connection mode;
s3, angle adjustment: adjusting the angle between the magnetic rods 1 according to the magnetic flux;
and S4, finishing the combination.
Preferably, in the winding process of the coil 2 in step S1, n represents the number of turns of the coil 2, e represents induced electromotive force, and a voltage appearing between the two ends under a non-resonant condition is calculated by the following relation:
preferably, in step S3, the angle adjustment of the magnetic rod 1 is adjusted according to the total magnetic flux passing through the loop antenna, and the total magnetic flux passing through the loop antenna is calculated by the following formula: and phi is BAcos phi, B is the magnetic flux density, A is the effective area of the loop antenna, and phi is the included angle between the magnetic flux lines and the axis of the loop antenna.
Preferably, in step S3, when the loop antenna is placed at a place where electromagnetic waves pass and the magnetic flux density changes sinusoidally, the voltage induced by the carrier wave can be given by the following equation: v2 pi fBancos phi, V is the induced voltage, f is the carrier frequency, n is the number of turns of coil 2, and B is the magnetic flux density.
Preferably, in step S3, the magnetic field is generatedThe calculation formula of the flux is specifically as follows: b ═ μ H, B the permeability of the medium, H the magnetic field strength, and for a free space or a medium with μ ═ μ 0, the formula for the calculation of the magnetic flux is: v8 pi 10-7fHAncosφ。
Preferably, in step S3, the effective area calculation formula of the loop antenna is specifically: a ═ APractice ofμ`，APractice ofThe area enclosed by the coil 2 is denoted by μ' and the relative permeability is denoted by μ ═ μ/μ 0, and the voltage calculation formula of the coil 2 of the magnetic antenna is specifically: v8 pi 10-7μ`fHANCOSφ。
Wherein, the specification of the wire of the coil 2 selects a plurality of strands of copper core wires, the number of the strands is not less than 100, the wire diameter of each strand is less than 0.1mm, the strands are insulated with each other, the winding length of the coil 2 is about 50 percent of the length of the magnetic core material, and the total number of turns of the coil 2 is 300 and 450 turns.
Example 2
The winding method of the coil 2 in the embodiment is the same as that of the coil 2 in the embodiment, three magnetic rods 1 with the same length are used, the antenna coil 2 is sleeved on the middle magnetic rod 1 according to the winding method of the coil 2 in the embodiment, and the diameters of the magnetic rods 1 at two ends of the middle magnetic rod 1 are twice of the diameter of the middle magnetic rod 1, namely 4 times of the cross section area.
Example 3
The winding method of the coil 2 in the embodiment is the same as that of the coil 2 in the embodiment, the coil 2 is wound on two magnetic rods 1 with the same size according to the winding method of the coil 2 in the embodiment 1, and two groups of coils 2 are arranged on each magnetic rod 1.
Example 4
The winding method of the coil 2 in the embodiment is the same as the winding method of the coil 2 in the embodiment, the winding method of the coil 2 in the embodiment is adopted for winding the coil 2 on one magnetic rod 1 according to the winding method of the coil 2 in the embodiment 1, the distance between the two groups of coils 2 is at least more than 3-5 cm, the mutual inductance between the two groups of coils 2 can be ignored, the inductance of each section of the coil 2 winding can be taken as L/2, the turn number is 0.7n, and therefore the total turn number of the antenna coil 2 winding is increased to 1.4n, and the voltage of an induction signal on the coil 2 is improved.
Wherein, the number of turns of the coil 2 in the embodiment 2 is increased to 0.85n compared with the number of turns of the coil 2 in the embodiment, the sensitivity is improved by 3-6 dB compared with the embodiment 4, in the embodiment 3, the number of turns of the coil 2 in the comparative embodiment is 0.5n, the coil 2 is respectively arranged on two magnetic rods 1, as shown in fig. 4, the parallel distance between two magnetic rods 1 is greater than 5cm, the overall sensitivity of the antenna formed in embodiment 3 can be improved by about 3dB compared with that of embodiment 4, the four magnetic antenna combination proposed in the present invention has small volume, low grounding requirement, convenient installation and fixation, easy realization of combined reception with the satellite navigation system antenna such as GPS, etc., and strong antistatic deposition effect, the antenna has stable receiving performance under severe weather conditions such as thunder, rain, fog, snow and the like, has stronger environment adaptability, and still has good receiving effect when a received signal is weak.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The high-sensitivity omnidirectional magnetic antenna combination method is characterized by comprising the following steps:
s1, winding of coils: the winding mode of the coil adopts a sectional layered close winding mode, and the coil is wound in the middle of the magnetic bar;
s2, arrangement of magnetic rods: after the coil is wound, the magnetic rods are arranged in an end-to-end connection mode;
s3, angle adjustment: adjusting the angle between the magnetic rods according to the magnetic flux;
and S4, finishing the combination.
2. The combination of high sensitivity omni-directional magnetic antenna according to claim 1 wherein during the winding of the coil in step S1, n represents the number of turns of the coil, e represents the induced electromotive force, and the voltage appearing between the two terminals under non-resonant condition is determined byCalculating a relational expression, wherein the relational expression is specifically as follows:
3. the high sensitivity omni-directional magnetic antenna combining method according to claim 1, wherein in step S3, the angle adjustment of the magnetic rods is adjusted according to the total magnetic flux passing through the loop antenna, and the total magnetic flux passing through the loop antenna is calculated by the following formula: and phi is BAcos phi, B is the magnetic flux density, A is the effective area of the loop antenna, and phi is the included angle between the magnetic flux lines and the axis of the loop antenna.
4. The high sensitivity omni-directional magnetic antenna combination method according to claim 3, wherein in step S3, when the loop antenna is placed at a place where electromagnetic waves pass and the magnetic flux density varies sinusoidally, the voltage induced by the carrier wave is given by: v2 pi fBancos phi, V is the induced voltage, f is the carrier frequency, n is the number of coil turns, and B is the magnetic flux density.
5. The high-sensitivity omni-directional magnetic antenna combination method according to claim 4, wherein the calculation formula of the magnetic flux in the step S3 is specifically as follows: b ═ μ H, B the permeability of the medium, H the magnetic field strength, and for a free space or a medium with μ ═ μ 0, the formula for the calculation of the magnetic flux is: v8 pi 10-7fHAn cosφ。
6. The method as claimed in claim 3, wherein in step S3, the calculation formula of the effective area of the loop antenna is as follows: a ═ APractice ofμ`，APractice ofThe area enclosed by the coil is denoted by μ', and the relative permeability is denoted by μ ═ μ/μ 0, and the voltage calculation formula of the coil of the magnetic antenna is specifically as follows: v8 pi 10-7μ`fHANCOSφ。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210122458.9A CN114498037A (en) | 2022-02-09 | 2022-02-09 | High-sensitivity omnidirectional magnetic antenna combination method |
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| CN202210122458.9A CN114498037A (en) | 2022-02-09 | 2022-02-09 | High-sensitivity omnidirectional magnetic antenna combination method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB857269A (en) * | 1958-04-03 | 1960-12-29 | Atomic Energy Authority Uk | Improvements in or relating to magnetic core assemblies |
| CN105720371A (en) * | 2016-01-28 | 2016-06-29 | 上海帝可容数字科技有限公司 | Magnetic rod antenna |
| CN106486776A (en) * | 2016-10-19 | 2017-03-08 | 赵嵩郢 | A kind of highly sensitive long wave omnidirectional magnetic antenna |
| CN206451831U (en) * | 2016-10-19 | 2017-08-29 | 赵嵩郢 | A kind of highly sensitive long wave omnidirectional magnetic antenna |
| CN206564328U (en) * | 2017-03-22 | 2017-10-17 | 中南大学 | Transient electromagnetic exploration integrated dual-mode antenna rod and measurement apparatus |
-
2022
- 2022-02-09 CN CN202210122458.9A patent/CN114498037A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB857269A (en) * | 1958-04-03 | 1960-12-29 | Atomic Energy Authority Uk | Improvements in or relating to magnetic core assemblies |
| CN105720371A (en) * | 2016-01-28 | 2016-06-29 | 上海帝可容数字科技有限公司 | Magnetic rod antenna |
| CN106486776A (en) * | 2016-10-19 | 2017-03-08 | 赵嵩郢 | A kind of highly sensitive long wave omnidirectional magnetic antenna |
| CN206451831U (en) * | 2016-10-19 | 2017-08-29 | 赵嵩郢 | A kind of highly sensitive long wave omnidirectional magnetic antenna |
| CN206564328U (en) * | 2017-03-22 | 2017-10-17 | 中南大学 | Transient electromagnetic exploration integrated dual-mode antenna rod and measurement apparatus |
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