CN212968046U - 433MHz PCB antenna - Google Patents
433MHz PCB antenna Download PDFInfo
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- CN212968046U CN212968046U CN202021991698.5U CN202021991698U CN212968046U CN 212968046 U CN212968046 U CN 212968046U CN 202021991698 U CN202021991698 U CN 202021991698U CN 212968046 U CN212968046 U CN 212968046U
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Abstract
The utility model provides a 433 MHz's PCB antenna, include: the PCB board and radiation element and the feed point of setting on the PCB board, the PCB board includes first face and with the second face that first face carried on the back mutually, the first face of PCB board with the second face all is equipped with the radiation element, and one of them radiation element on the first face passes through first via hole on the PCB board with the radiation element electricity on the second face is connected, the radiation element on the second face passes through second via hole on the PCB board with another one on the first face the radiation element electricity is connected, one of them radiation element on the first face with the feed point electricity is connected. The utility model provides a 433 MHz's PCB antenna size is little, with low costs, the performance is high.
Description
Technical Field
The utility model relates to an antenna technology field especially relates to a 433 MHz's PCB antenna.
Background
An antenna is a device for transmitting or receiving electromagnetic waves, and is an energy converter. The antenna is used for converting high-frequency current carrying data and space electromagnetic wave carrying data, and is an important component of wireless communication equipment. The PCB antenna can be directly coupled with a circuit on the PCB without extra welding, has the remarkable advantages of strong integration, low cost, high reliability and the like compared with other types of antennas, and becomes one of the most widely applied antenna types at present.
In the 433MHz PCB antenna in the prior art, a feed point is a rectangular structure and is connected with a radiation unit and a ground plate, the whole antenna is positioned on the same plane of a cuboid PCB, and the ground plate is two rectangular structures with the same size and is positioned on the parallel plane of the PCB and the radiation unit.
However, the 433MHz PCB antenna in the prior art has a large area, and cannot be applied to electronic products with a small internal space.
SUMMERY OF THE UTILITY MODEL
The utility model provides a 433 MHz's PCB antenna for it is great to solve the antenna volume at least, can't be applied to the technical problem in the less electronic product of inner space.
In order to achieve the above object, the utility model provides a 433 MHz's PCB antenna, include: PCB board and radiation element and the feed point of setting on the PCB board.
The PCB board comprises a first surface and a second surface opposite to the first surface.
The radiation unit includes: a first radiating portion, a second radiating portion and a third radiating portion, the first radiating portion and the third radiating portion being located on the first face and being spaced apart from each other, the second radiating portion being located on the second face.
One end of the first radiation part is connected with the feeding point.
The other end of the first radiation part is connected with one end of the second radiation part through the first via hole, and the other end of the second radiation part is connected with one end of the third radiation part through the second via hole.
At least one of the first radiating portion, the second radiating portion and the third radiating portion includes at least one folded metal segment.
The length of the radiation unit is 400mm-440 mm.
In a possible embodiment, the first radiating portion, the second radiating portion and/or the third radiating portion comprise a plurality of the folded-back metal sections.
And a plurality of the inflection metal sections are sequentially connected end to form the first radiation part, the second radiation part and the third radiation part.
In one possible embodiment, the first radiating portion includes a first metal segment and a second metal segment.
The second metal segment includes at least one of the folded back metal segments.
The length of the first metal section is 14.50mm-18.00mm, and two ends of the first metal section are respectively connected with the feed point and one end of the second metal section.
The 433MHz PCB antenna as described above, optionally each of the folded back metal segments comprises: the metal section comprises a transverse metal section and a longitudinal metal section, wherein the transverse metal section and the longitudinal metal section are vertically connected end to end, and the transverse metal section of one of the two adjacent reverse-folded metal sections is vertically connected with the longitudinal metal section of the other reverse-folded metal section.
One end of the first metal section is vertically connected with the transverse metal section of the first folded metal section in the second metal section.
In one possible embodiment, the first metal segment is a fold line, and the fold line includes at least one break point.
The 433MHz PCB antenna as described above, optionally, the length of the transverse metal segment is 0.90mm to 1.30mm, and the length of the longitudinal metal segment is 2.90mm to 3.20 mm.
As for the 433MHz PCB antenna, optionally, the widths of the traces of the radiation units are all 0.2mm to 0.4 mm.
The 433MHz PCB antenna as described above, optionally, further includes: at least one ground plate located on the first or second face of the PCB plate.
As for the 433MHz PCB antenna, optionally, the number of the ground plates is two, the two ground plates are respectively disposed on the first surface and the second surface of the PCB, and the two ground plates are electrically connected through a plurality of vias.
The 433MHz PCB antenna as described above, the second radiation portion further includes: and a connecting metal segment.
The connecting metal section is connected with two of the folded metal sections in the second radiation part, and the connecting metal section is used for dividing the plurality of folded metal sections in the second radiation part into two rows.
The length of the connecting metal segment is 6.6mm-8 mm.
The utility model provides a 433 MHz's PCB antenna, wherein, the feed point is connected as one of them radiating element electricity of first face on the signal access point of PCB antenna and the PCB board, one of them radiating element in first face is connected through first via hole and the second facial radiating element electricity on the PCB board, radiating element rethread second via hole on the second face is connected with the other radiating element electricity of first face on the PCB board, thus, can realize the utilization optimization of two-sided PCB board, the shared size of radiating element in the PCB board has significantly reduced, can make the size of PCB board reduce greatly, the PCB antenna size of having solved traditional 433MHz is great, can't be applied to the shortcoming in the less electronic product of inner space. And, the radiating element adopts many snakes of inflection line folding mode, can further reduce PCB antenna size.
In addition to the technical problems, technical features constituting technical solutions, and advantageous effects brought by the technical features of the technical solutions described above, other technical problems that can be solved by the wearable electronic device provided by the embodiments of the present invention, other technical features included in the technical solutions, and advantageous effects brought by the technical features will be further described in detail in specific embodiments.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a top-level diagram of a 433MHz PCB antenna provided in an embodiment of the present invention;
fig. 2 is a bottom view of a 433MHz PCB antenna provided in an embodiment of the present invention;
fig. 3 is a return loss diagram of the 433MHz PCB antenna provided in the embodiment of the present invention;
fig. 4 is a 433MHz PCB antenna gain diagram according to an embodiment of the present invention.
Description of reference numerals:
100-a PCB board;
110-a first side;
120-a second face;
130 — a first via;
140-a second via;
200-a radiating element;
210-a first radiating portion;
211 — a first metal segment;
212-a second metal segment;
220-a second radiating portion;
221-connecting metal segments;
230-a third radiating portion;
240-folding back the metal section;
241-transverse metal section;
242-longitudinal metal sections;
300-a feed point;
400-ground plane.
Detailed Description
To make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
An antenna is a device for transmitting or receiving electromagnetic waves, and is an energy converter. The antenna is used for converting high-frequency current carrying data and space electromagnetic wave carrying data, and is an important component of wireless communication equipment. The working principle of the antenna is that when alternating current flows on the lead, the radiation of electromagnetic waves can be formed, and the radiation capability is related to the length, the shape and other parameters of the lead. When the length of the wire is increased to be comparable to the wavelength, the current on the wire is increased considerably, and a stronger radiation is formed. In order to improve the ability of the antenna to receive or transmit electromagnetic waves, the shape and length of the antenna need to be adjusted appropriately. The antenna is of various kinds. The size of the wire antenna, the PCB antenna, the ceramic sheet antenna, the spring antenna and other antennas is small, the combination with a wireless electronic product is facilitated, and the antenna is widely applied to a wireless communication system. Among them, the PCB antenna is more widely used for some consumer wireless electronic products with limited size and sensitive cost. Because the PCB antenna can be directly coupled with a circuit on the PCB, additional welding is not needed, and compared with other types of antennas, the antenna has the remarkable advantages of strong integration, low cost, high reliability and the like. The Printed Circuit Board Antenna, which is a PCB Antenna, refers to a Printed metal wire using a Printed Circuit Board as a carrier, and has various specifications such as a linear type, an L type, an inverted F type, a linear type, and a spiral type.
In the wireless communication of the Internet of things, the frequency band less than 1GHz is called Sub-1G, has the advantages of strong penetrating power, long transmission distance and the like, and is suitable for application scenes with long distance, low speed and low power consumption. The 433MHz frequency band in Sub-1G belongs to an unlicensed frequency band in China, and has wide application
However, with the trend of miniaturization and integration of wireless electronic products, the miniaturization of the antenna is increasingly demanded. The existing 433MHz PCB antenna is still bigger than many wireless electronic products in volume, and its application range is limited greatly. Resulting in many miniaturized wireless electronic products having to employ smaller but expensive ceramic antennas or PCB antennas of a reduced size, resulting in severe performance degradation.
In view of this, in order to solve the problem that traditional 433 MHz's PCB antenna size is big on the left, the utility model provides a 433 MHz's PCB antenna adopts two-sided line form of walking to, radiating element adopts the serpentine folding mode of many inflection, has reduced the size of antenna greatly, and with low costs, the performance is good, has very strong practicality.
The 433MHz PCB antenna of the embodiments of the present invention is described below with reference to the drawings.
Fig. 1 is a top layer diagram of the 433MHz PCB antenna provided in the embodiment of the present invention, and fig. 2 is a bottom layer diagram of the 433MHz PCB antenna provided in the embodiment of the present invention.
Referring to fig. 1 and fig. 2, a 433MHz PCB antenna provided in an embodiment of the present invention includes a PCB board 100, and a radiation unit 200 and a feeding point 300 disposed on the PCB board 100.
The PCB board 100 includes a first side 110 (shown in a top view of the PCB antenna in fig. 1) and a second side 120 (shown in a bottom view of the PCB antenna in fig. 2) opposite the first side 110.
The first surface 110 and the second surface 120 of the PCB 100 are both provided with the radiation units 200, one of the radiation units 200 on the first surface 110 is electrically connected to the radiation unit 200 on the second surface 120 through the first via 130 on the PCB 100, and the radiation unit 200 on the second surface 120 is electrically connected to the other radiation unit 200 on the first surface 110 through the second via 140 on the PCB 100. One of the radiation elements 200 on the first surface 110 is electrically connected to a feeding point 300, wherein the feeding point 300 serves as a signal access point of the PCB antenna, and the feeding point 300 is electrically connected to a feed (i.e., a signal emission source), which may be a radio frequency module.
It is easily understood that since the wavelength of the 433MHz signal is longer, about 692.84mm, the length of the 1/4 wavelength monopole antenna is 173.21mm, and if a 173.21mm long metal wire is directly placed on one side of the PCB as a PCB antenna, the PCB board would be oversized. If the radiating element 200 is routed on the first surface 110 of the PCB 100 for a distance, and then is continuously routed on the second surface 120 of the PCB 100 through the first via 130, and then returns to the first surface 110 of the PCB 100 through the second via 140 to complete the routing length of the radiating element 200, the size of the PCB 100 serving as a carrier can be greatly reduced, and the requirement of being applied to an electronic product with a small internal space can be met.
Optionally, the via hole is a hole filled with copper to connect the radiation unit 200 on the first surface 110 and the second surface 120 of the PCB 100, and the inner diameter of the via hole is 0.3mm and the outer diameter of the via hole is 0.5 mm.
Optionally, the radiating element 200 and the ground plate 400 are copper-clad.
Furthermore, in the PCB antenna of 433MHz provided in the embodiment of the present invention, the radiating unit 200 may not be grounded, and may be applied to a circuit with dc output, thereby widening the application range of the antenna.
The utility model provides a 433 MHz's PCB antenna can be applied to the wireless communication field of 433MHz frequency channel, if wireless meter reading, wireless remote control ware and wireless doorbell etc.
Referring to fig. 1 and 2, in some embodiments of the invention, the radiation unit 200 comprises: a first radiating part 210, a second radiating part 220 and a third radiating part 230, the first radiating part 210 and the third radiating part 230 being located on the first face 110 with the first radiating part 210 and the third radiating part 230 being spaced apart, the second radiating part 220 being located on the second face 120.
Wherein one end of the first radiation part 210 is connected to the feeding point 300.
The other end of the first radiation part 210 is connected to one end of the second radiation part 220 through the first via hole 130, and the other end of the second radiation part 220 is connected to one end of the third radiation part 230 through the second via hole 140. For example, as shown in fig. 1 and fig. 2, the first radiation portion 210 on the first surface 110 is routed from the feeding point 300, and is routed to the leftmost end by twice-folding, then is routed from the leftmost end of the PCB 100 to the rightmost end of the PCB 100, and is connected to the second radiation portion 220 on the second surface 120 through the first via 130, the second radiation portion 220 is routed from the rightmost end of the second surface 120 of the PCB 100 to the leftmost end, and is then routed from the leftmost end to the rightmost end, and is connected to the third radiation portion 230 of the first surface 110 of the PCB 100 through the second via 140, and the third radiation portion 130 is routed from the rightmost end to the leftmost end of the first surface 110 of the PCB 100, so that the utilization of the double-sided PCB can be optimized, and the size of the PCB can be greatly reduced.
In order to further reduce the area of the PCB antenna, at least one of the first, second and third radiation parts 210, 220 and 230 includes at least one folded metal segment 240.
Since the use of the multi-meander line affects the radiation performance of the signal, it is necessary to increase the total length of the meander line to achieve the performance of the quarter-wave antenna. Therefore, in the embodiment of the present invention, the length of the radiating element is 400mm-440mm, and although the total length of the multi-turn line is increased, the occupied PCB size is still greatly reduced compared with the quarter-wave antenna without the turn due to the turn structure.
"at least one of the first, second, and third radiation parts 210, 220, and 230 includes at least one folded metal segment 240" means that one of the first, second, and third radiation parts 210, 220, and 230 includes at least one folded metal segment 240, or two of them include at least one folded metal segment 240, respectively, or three of the first, second, and third radiation parts 210, 220, and 230 include at least one folded metal segment 240, respectively.
It is easy to understand that the folded metal segment 240 is folded to further reduce the size of the PCB 100 as a carrier under the condition that the trace length of the radiating element 200 is satisfied.
In some embodiments of the present invention, the first radiating portion 210, the second radiating portion 220 and/or the third radiating portion 230 may further include a plurality of folded metal sections 240.
"the first radiation part 210, the second radiation part 220 and/or the third radiation part 230 includes a plurality of folded metal sections 240" means that one of the first radiation part 210, the second radiation part 220 and the third radiation part 230 includes a plurality of folded metal sections 240, or two of them include a plurality of folded metal sections 240, respectively, or three of the first radiation part 210, the second radiation part 220 and the third radiation part 230 include a plurality of folded metal sections 240, respectively. Illustratively, as shown in fig. 1 and 2, each of the first radiating portion 210, the second radiating portion 220, and the third radiating portion 230 includes a plurality of folded metal segments 240.
The plurality of folded metal segments 240 are sequentially connected end to form a first radiation portion 210, a second radiation portion 220 and a third radiation portion 230.
It should be noted that, on the premise of meeting the routing length of the radiation unit 200, the number of the folded metal segments 240 may be reduced or increased, and only the antenna using condition is met, and here, no limitation is imposed on the number of the folded metal segments 240.
In addition, besides considering reducing the length of the radiating element 200 on the PCB 100, reducing the size of the PCB antenna may also consider reducing the width of the radiating element 200 on the PCB 100, that is, reducing the width of the metal trace of the first, second and third radiating portions 210, 220 and 230, but reducing the width of the metal trace too much, which may cause the application limitation, and may cause the antenna performance to be seriously degraded, the gain to be reduced, and the practicability to be poor, so in some embodiments of the present invention, the trace width of the radiating element 200 is set within 0.2mm-0.4 mm.
In some embodiments of the present invention, the first radiation portion 210 may further include a first metal segment 211 and a second metal segment 212.
Wherein, the second metal segment 212 includes at least one folded metal segment 240, and both ends of the first metal segment 211 are respectively connected to the feeding point 300 and one end of the second metal segment 212. For example, if the feeding point 300 is located on the same vertical line as the initial end of the second metal segment 212, a straight first metal segment 211 may be used to connect the feeding point 300 and the initial end of the second metal segment 212, wherein the first metal segment 211 has a length of 14.50mm to 18.00 mm.
Of course, in some examples, the first metal segment 211 may also be a broken line type, and the broken line thereof includes at least one broken point, and it is only necessary to ensure that the length of the first metal segment 211 is between 14.50mm and 18.00mm, for example, as shown in fig. 1, the first metal segment 211 includes two broken points, and two ends of the two broken points are respectively connected to the feeding point 300 and the second metal segment 212.
In some possible embodiments of the present invention, each of the folded metal sections 240 may include: the metal segment comprises a transverse metal segment 241 and a longitudinal metal segment 242, wherein the transverse metal segment 241 and the longitudinal metal segment 242 are vertically connected end to end, and the transverse metal segment 241 of one folded metal segment 240 of two adjacent folded metal segments 240 is vertically connected with the longitudinal metal segment 242 of the other folded metal segment 240, so that the folded metal segments 240 form a folded line segment as shown in fig. 1 and 2.
Wherein, one end of the first metal segment 211 is vertically connected to the transverse metal segment 241 of the first folded metal segment 240 in the second metal segment 212.
It can be understood that the transverse metal segments 241 and the longitudinal metal segments 242 are vertically connected end to end, and the transverse metal segment 241 of one folded metal segment 240 of two adjacent folded metal segments 240 is vertically connected with the longitudinal metal segment 242 of the other folded metal segment 240, which further compresses the tiling area of the radiation unit 200 on the PCB board 100, so that the PCB board can be smaller in size.
It should be noted that, in the second radiation portion 220, in order to reduce the width of the second radiation portion 220 tiled on the PCB 100 in the vertical direction, a connection metal segment 221 is further included, the connection metal segment 221 connects two folded metal segments 240 in the second radiation portion 220, so that the plurality of folded metal segments 240 in the second radiation portion 220 can be arranged in two rows, where the length of the connection metal segment 221 is between 6.6mm and 8 mm.
As described above for the 433MHz PCB antenna, the feeding point 300 may be a square, with a side length within 0.2mm-0.4mm, the side length being equal to the width of the first metal segment 211, and coinciding with the first metal segment 211, for example, one end of the first metal segment 211 partially or completely covers the feeding point 300 to achieve electrical connection.
In some embodiments of the present invention, the present invention may further include: at least one ground plate 400, the ground plate 400 being located at the first face 110 or the second face 120 of the PCB board 100.
Optionally, the ground plate 400 has a rectangular structure and is located at one side of the PCB board 100.
Of course, the number of the ground plates 400 may be two, two ground plates 400 are respectively disposed on the first and second faces 110 and 120 of the PCB board 100, and the two ground plates 400 are electrically connected through a plurality of vias.
The size of the ground plate 400 may be increased or decreased, and is not limited herein.
In order to highlight the advantages of the present invention, it is right to further the present invention
And (4) explanation.
In a possible implementation manner of the present invention, the PCB board 100 is an FR4 double-sided PCB board with a height of 16.9mm, a width of 18.5mm, and a thickness of 1.2 mm. The two ground plates 400 are respectively arranged on the top layer and the bottom layer of the PCB 100, the length of the ground plate 400 is 18.5mm, the width of the ground plate 400 is 5.5mm, and the two ground plates 400 are electrically connected through a plurality of uniformly arranged through holes (not shown in the figure). The line widths of the radiation units 200 are all set to 0.3 mm.
The feeding point 300 is square, the side length is 0.3mm, the first metal section 211 is a broken line and comprises two broken points, one end of the first metal section 211 is overlapped with the feeding point 300, the linear length of each section of the first metal section 211 from the feeding point 300 is respectively 2mm, 10.35mm and 3.9mm, and the other end of the first metal section is vertically connected with the transverse metal section 241 of the first folded metal section 240 in the second metal section 212.
The second metal segment 212 comprises 26 folded metal segments 240, each folded metal segment 240 comprises a transverse metal segment 241 and a longitudinal metal segment 242, and the transverse metal segment 241 of one folded metal segment 240 of two adjacent folded metal segments 240 is vertically connected with the longitudinal metal segment 242 of the other folded metal segment 240, wherein the transverse metal segment 241 is 0.95mm in length, and the longitudinal metal segment 242 is 2.9mm in length.
The last transverse metal segment 241 of the second metal segments 212 is connected to the second radiating portion 220 of the second surface 120 of the PCB panel 100 through the first via 130, the second radiating portion 220 includes 52 folded metal segments 240 and one and longer longitudinal metal segments, the transverse metal segment 241 of one 240 of the two adjacent folded metal segments 240 is vertically connected to the longitudinal metal segment 242 of the other 240, wherein the length of the first longitudinal metal segment 242 of the second radiating portion 220 is 3.2mm, the length of the horizontal metal segment 241 is 1.275mm, the length of the last longitudinal metal segment 242 is 3.2mm, the length of the horizontal metal segment 241 is 1.275mm, the length of the other longitudinal metal segments 242 is 2.9mm, the length of the transverse metal segment 241 is 0.95mm, and the length of the longer longitudinal metal segment is 7 mm.
The last longitudinal metal segment 242 of the second radiation portion 220 is connected to the third radiation portion 230 of the first surface 110 of the PCB 100 through the second via hole 140, and the third radiation portion 230 includes 26 folded metal segments 240, wherein the length of the transverse metal segment 241 is 0.95mm, the length of the longitudinal metal segment 242 excluding the last longitudinal metal segment 242 is 3.2mm, and the lengths of the other longitudinal metal segments 242 are 2.9 mm.
The actual trace length of the radiating element 200 is 421.55mm, and the area of the PCB occupied by the radiating element is 17.6mm × 10.6mm ═ 186.56mm2And its area compares general minimum PCB board on the market, only is its third, so, the embodiment of the utility model provides a 2.4 GHz's PCB antenna size is little, and material cost is low, can be applicable to small-size wireless electronic product more.
Fig. 3 is a return loss diagram of the 433MHz PCB antenna provided in the embodiment of the present invention, and referring to fig. 3, the frequency range with return loss less than-10 dB is between 430MHz and 438MHz, and the bandwidth is 8MHz, which meets the use requirement.
Fig. 4 is a gain diagram of the 433MHz PCB antenna according to the embodiment of the present invention, and referring to fig. 4, the maximum gain is about 2dBi, and the gain level of the antenna meets the requirement of use.
The embodiment of the utility model provides a 433 MHz's PCB antenna concrete implementation mode, its inflection line length, interval, the position isoparametric that constitute radiating element have all passed through numerous and complicated emulation calculation and actual engineering debugging, have guaranteed the intensity of antenna performance.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
To sum up, the embodiment of the utility model provides a 433 MHz's PCB antenna has following beneficial effect:
A. simple structure, the reliability is high.
B. The radiating unit occupies small area of the PCB, has low material cost and can be applied to small-sized wireless electronic products.
C. The antenna has the advantages of large gain, small return loss, wide bandwidth and better performance than a PCB antenna with similar size.
D. The circuit has no grounding point, can be applied to circuits with direct current output, and has wide application range.
E. The appearance is succinct, and the physical design is suitable, and the defective rate is low, the batch production of being convenient for.
The utility model provides a 433 MHz's PCB antenna, wherein, the feed point is connected as one of them radiating element electricity of first face on the signal access point of PCB antenna and the PCB board, one of them radiating element in first face is connected through first via hole and the second facial radiating element electricity on the PCB board, radiating element rethread second via hole on the second face is connected with the other radiating element electricity of first face on the PCB board, thus, can realize the utilization optimization of two-sided PCB board, the shared size of radiating element in the PCB board has significantly reduced, can make the size of PCB board reduce greatly, the PCB antenna size of having solved traditional 433MHz is great, can't be applied to the shortcoming in the less electronic product of inner space. And, the radiating element adopts many snakes of inflection line folding mode, can further reduce PCB antenna size. And the radiation unit has no grounding point, can be applied to a circuit with direct current output, and widens the application range of the antenna. When the line width of walking at radiating element reduced to 0.3mm, increased the folding number of times of inflection line, under the condition of guaranteeing the line length of walking, reduced the size of the PCB board as the carrier, simple structure, the good reliability.
In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "top", "bottom", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "axial", "circumferential", and the like, which are used to indicate the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, and do not indicate or imply that the position or element referred to must have a particular orientation, be of particular construction and operation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; either directly or indirectly through intervening media, such as through internal communication or through an interaction between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. A433 MHz PCB antenna, comprising: the PCB board, and the radiation unit and the feed point which are arranged on the PCB board;
the PCB comprises a first surface and a second surface opposite to the first surface;
the radiation unit includes: a first radiating portion, a second radiating portion and a third radiating portion, the first radiating portion and the third radiating portion being located on the first face and spaced apart from each other, the second radiating portion being located on the second face;
one end of the first radiation part is connected with the feeding point;
the other end of the first radiation part is connected with one end of the second radiation part through a first via hole on the PCB, and the other end of the second radiation part is connected with one end of a third radiation part through a second via hole on the PCB;
at least one of the first radiating portion, the second radiating portion and the third radiating portion comprises at least one folded metal section;
the length of the radiation unit is 400mm-440 mm.
2. The 433MHz PCB antenna of claim 1, wherein the first, second and/or third radiating portions comprise a plurality of said folded back metal segments;
and a plurality of the inflection metal sections are sequentially connected end to form the first radiation part, the second radiation part and the third radiation part.
3. The 433MHz PCB antenna of claim 1 or 2, wherein the first radiating portion comprises a first metal segment and a second metal segment;
the second metal segment comprises at least one of the reverse folded metal segments;
the length of the first metal section is 14.50mm-18.00mm, and two ends of the first metal section are respectively connected with the feed point and one end of the second metal section.
4. The 433MHz PCB antenna of claim 3, wherein each of said folded-back metal segments comprises: the metal section comprises a transverse metal section and a longitudinal metal section, wherein the transverse metal section and the longitudinal metal section are vertically connected end to end, and the transverse metal section of one of the two adjacent reverse-folded metal sections is vertically connected with the longitudinal metal section of the other reverse-folded metal section;
one end of the first metal section is vertically connected with the transverse metal section of the first folded metal section in the second metal section.
5. The 433MHz PCB antenna of claim 4, wherein said transverse metal segment length is 0.90mm-1.30mm, and said longitudinal metal segment length is 2.90mm-3.20 mm.
6. The 433MHz PCB antenna of claim 3, wherein the first metal segment is a meander line, and the meander line comprises at least one meander point.
7. The 433MHz PCB antenna of claim 1 or 2, wherein the width of the trace of the radiating element is 0.2mm-0.4 mm.
8. The 433MHz PCB antenna of claim 1 or 2, further comprising: at least one ground plate located on the first or second face of the PCB plate.
9. The 433MHz PCB antenna of claim 8, wherein the number of the ground plates is two, two of the ground plates are disposed on the first and second sides of the PCB plate, respectively, and the two ground plates are electrically connected by a plurality of vias.
10. The 433MHz PCB antenna of claim 2, wherein said second radiating portion further comprises: a connecting metal segment;
the connecting metal section is connected with two of the folded metal sections in the second radiation part and used for dividing the folded metal sections in the second radiation part into two rows;
the length of the connecting metal segment is 6.6mm-8 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021991698.5U CN212968046U (en) | 2020-09-11 | 2020-09-11 | 433MHz PCB antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021991698.5U CN212968046U (en) | 2020-09-11 | 2020-09-11 | 433MHz PCB antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212968046U true CN212968046U (en) | 2021-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021991698.5U Active CN212968046U (en) | 2020-09-11 | 2020-09-11 | 433MHz PCB antenna |
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| Country | Link |
|---|---|
| CN (1) | CN212968046U (en) |
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2020
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