Ultra-wideband monopole omnidirectional antenna

Abstract

An ultra-wideband monopole omnidirectional antenna comprises a base, and an oscillator plate is installed above the base; the copper sheets are bent and symmetrically arranged on the left side and the right side of the oscillator plate, the copper sheets are provided with reflecting surfaces, and forward projections of the reflecting surfaces fall on the oscillator plate; one end of the copper wire is connected with the reflecting surface, and the other end of the copper wire is detachably connected with the oscillator plate. The two copper sheets are arranged on the oscillator plate, the two copper sheets are symmetrically arranged on the two sides of the oscillator plate, the length of the oscillator plate is increased through the copper sheets, and therefore it is ensured that the antenna has a large bandwidth. And at the moment, the two copper sheets are bent inwards, so that the space occupied by the copper sheets in the antenna is reduced, and frequency adjustment is realized.

Description

Technical Field

[0001] The invention relates to the technical field of communications, in particular to an ultra-wideband monopole omnidirectional antenna. Background Art

[0002] Communication technology in complex application environments such as vehicle-mounted systems, drones, unmanned patrol cars or robots faces a series of unique challenges. These devices often need to operate stably under changing physical conditions while ensuring high-speed data transmission and reception quality. Due to the complex use environment, signal interference and attenuation problems are frequent, so antennas with larger bandwidths are needed to meet the stringent requirements of communication work. However, the traditional solution is to increase the size of the antenna to expand the bandwidth. Although this approach is effective to a certain extent, it also brings new problems.

[0003] Specifically, larger antennas will significantly compress the valuable space inside the device during installation, which undoubtedly increases the difficulty and complexity of installation for devices with extremely limited space. In vehicle-mounted systems, this may limit the layout of other key components; on small aircraft such as drones, the increase in weight and volume may affect flight performance, such as flight stability and endurance. In order to accommodate these large antennas, manufacturers often have to expand the overall installation space of the equipment, which not only means an increase in the size of the equipment, but also directly leads to a surge in manufacturing costs.

[0004] It is particularly noteworthy that in highly integrated and weight-sensitive small devices such as drones, the increase in antenna size may become an unacceptable burden. It may force designers to sacrifice other important performance parameters such as load capacity, flight speed or concealment to meet the needs of antenna installation. Therefore, the industry urgently needs an antenna with small size, light weight and ultra-wideband characteristics to meet the communication needs in complex environments without sacrificing device performance. Summary of the invention

[0005] In view of the above-mentioned defects, the object of the present invention is to provide an ultra-wideband monopole omnidirectional antenna, which can improve its bandwidth while keeping the antenna small.

[0006] To achieve this purpose, the present invention adopts the following technical solution: an ultra-wideband monopole omnidirectional antenna, comprising: A base, with a vibrator plate installed on the top of the base; A copper sheet is symmetrically bent and arranged on the left and right sides of the vibrator plate, and the copper sheet is provided with a reflecting surface, and the forward projection of the reflecting surface falls on the vibrator plate; A copper wire, one end of which is connected to the reflecting surface, and the other end of which is detachably connected to the vibrator plate.

[0007] Preferably, the copper sheet also includes a mounting portion and a transition portion, the mounting portion is fixed to an edge of one end surface of the oscillator plate through a fixing member, the mounting portion is connected to the transition portion at a side edge of the oscillator plate, and the transition portion is connected to the reflecting surface at the other side surface of the oscillator plate.

[0008] Preferably, the reflecting surface includes an overlapping portion, and the overlapping portion is a portion where the orthographic projections of the two reflecting surfaces on the vibrator plate overlap; The copper wire is connected to the overlapping portion.

[0009] Preferably, the width of the overlapped portion is X, where X is obtained by the following formula: ; ; Where d is the straight-line distance between the two reflecting surfaces, is the dielectric constant, j is the imaginary unit, f is the required adjustment frequency, L is the height of the reflecting surface, is the straight line length between the transition part and the reflecting surface, and D is the width of the oscillator plate.

[0010] Preferably, the overlapping portion is provided with a plurality of welding points along the height direction, and one end of the copper wire is fixed to the welding point.

[0011] Preferably, it also includes a support plate, which is fixed to the edge of the vibrator plate, and the outer contour of the support plate fits the inner contour of the combination of the transition portion and the reflective surface, and the support plate is fixedly connected to the internal structure of the copper sheet.

[0012] Preferably, it further comprises a damper, one end of which is fixed to the fixing member, and the other end of which is fixed to a side of the support plate facing the vibrator plate; The internal connection point between the transition part and the vibrator plate is taken as the first endpoint, the connection point between the transition part and the reflecting surface is taken as the second endpoint, and the line connecting the first endpoint and the second endpoint is taken as the reference line. The length direction of the damper is set horizontally with the length direction of the reference line.

[0013] Preferably, the surface of the vibrator plate is coated with solder resist green oil; The vibrator plate is further provided with two slots, the slots are symmetrically arranged along the solder resist green oil, the slots are located below the copper sheet, and the length direction of the slots is consistent with the height direction of the vibrator plate; The width e of the slot is smaller than the width E of the vibrator plate beside the slot.

[0014] Preferably, the cross-section of the slot is I-shaped.

[0015] Preferably, it also includes a shell, which is detachably connected to the base, and the vibrator plate and the copper sheet are wrapped in the shell.

[0016] One of the above technical solutions has the following advantages or beneficial effects: 1. Two copper sheets are arranged on the vibrator plate, and the two copper sheets are symmetrically arranged on both sides of the vibrator plate. The length of the vibrator plate is extended by the copper sheets, thereby ensuring that the antenna has a larger bandwidth. At this time, the two copper sheets are bent inward, thereby reducing the space occupied by the copper sheets in the antenna, thereby achieving frequency adjustment.

[0017] 2. Users can control the length of the copper wire according to their needs, thereby adjusting the inductance distribution on the vibrator plate, thereby offsetting the inductance on the copper sheet, allowing low-frequency signals to pass or be received. When low-frequency signal filtering is required, the copper wire on the vibrator plate can be removed to achieve low-frequency signal filtering. This greatly improves the adaptability of the antenna, realizes ultra-wideband miniaturized antenna design, reduces the burden on the equipment, and is especially suitable for small devices such as drones that are sensitive to weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0019] Figure 2 It is a structural cross-sectional view of another embodiment of the present invention.

[0020] Figure 3 is a top view of another embodiment of the present invention.

[0021] Including: Base 1, Copper sheet 2, reflecting surface 21, overlapping portion 211, transition portion 22, mounting portion 23, Copper wire 3, fixing part 4, welding point 5, support plate 6, damper 7, slot 8, housing 9, reference line 10, vibrator plate 11. DETAILED DESCRIPTION

[0022] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0023] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] like Figures 1 to 3 As shown, an ultra-wideband monopole omnidirectional antenna comprises: A base 1, with a vibrator plate 11 installed on the top of the base 1; The copper sheet 2 is symmetrically bent and arranged on the left and right sides of the vibrator plate 11, and the copper sheet 2 is provided with a reflecting surface 21, and the forward projection of the reflecting surface 21 falls on the vibrator plate 11; A copper wire 3 , one end of which is connected to the reflecting surface 21 , and the other end of which is detachably connected to the vibrator plate 11 .

[0027] The traditional solution is to increase the volume of the antenna to expand the bandwidth, but in some highly integrated devices, it is difficult to expand the volume of the antenna. For this reason, in the present invention, two copper sheets 2 are arranged on the vibrator plate 11, and the two copper sheets 2 are symmetrically arranged on both sides of the vibrator plate 11. The length of the vibrator plate 11 is extended by the copper sheets 2, thereby ensuring that the antenna has a larger bandwidth, and whether to set the vibrator and other components on the copper sheet 2 can be determined according to the tuned frequency, and the copper sheet 2 is set in a bending manner, and the forward projection of the reflecting surface 21 falls on the vibrator plate 11. At this time, the two copper sheets 2 are bent inward, thereby reducing the space occupied by the copper sheet 2 in the antenna, thereby achieving frequency adjustment. However, due to the addition of the copper sheet 2, and the copper sheet 2 is set in a bending manner. At the same time, the copper sheet 2 on the vibrator plate 11 is equivalent to one plate of a parallel plate capacitor, and a capacitor is formed between it and the other copper sheet 2, and the capacitor has a filtering function, thereby improving the overall communication quality of the antenna, but the increase in capacitance will cause the resonant frequency formed by each component on the vibrator plate 11 to decrease. When low-frequency signal transmission is required, the higher capacitance will make it difficult for the low-frequency signal to pass through, so that the antenna cannot achieve the ultra-wideband effect. For this reason, in the present invention, the reflective surface 21 and the inductor element on the vibrator plate 11 are connected by copper wire 3. The copper wire 3 itself has a certain inductance. When the copper wire 3 is connected to the inductor element on the vibrator plate 11, the inductance on the copper wire 3 may interact with other inductance elements on the vibrator plate 11, or change the overall inductance distribution of the vibrator plate 11. The user can control the length of the copper wire 3 according to their own needs, thereby adjusting the inductance distribution on the vibrator plate 11, thereby offsetting the inductance on the copper sheet 2, so that the low-frequency signal can pass or be accepted. When it is necessary to filter the low-frequency signal, the copper wire 3 on the vibrator plate 11 can be disassembled to achieve filtering of the low-frequency signal. The adaptability of the antenna is greatly improved, the ultra-wideband miniaturized antenna design is realized, and the burden on the equipment is reduced. It is particularly suitable for small devices such as drones that are sensitive to weight.

[0028] Preferably, the copper sheet 2 also includes a mounting portion 23 and a transition portion 22, the mounting portion 23 is fixed to an end face edge of the oscillator plate 11 through a fixing member 4, the mounting portion 23 is connected to the transition portion 22 at the side edge of the oscillator plate 11, and the transition portion 22 is connected to the reflecting surface 21 at the other side of the oscillator plate 11.

[0029] In the present invention, the electrical patterns on the oscillator plate 11 can extend through the outer side surface of the mounting portion 23 to the outer side surface of the transition portion 22, and finally to the outer side surface of the reflecting surface 21, and the path of the outer side surface is greater than the path length of the inner side surface, further increasing the extension length of the oscillator plate 11.

[0030] At the same time, the copper sheet 2 is installed by this installation method, and part of the edge of the transition portion 22 can be against the side edge of the oscillator plate 11, so that the oscillator plate 11 provides support force in the X direction for the copper sheet 2, so that the copper sheet 2 can be more stable when resisting the force in the X direction.

[0031] Preferably, the reflecting surface 21 includes an overlapping portion 211, and the overlapping portion 211 is a portion where the orthographic projections of the two reflecting surfaces 21 on the vibrator plate 11 overlap; The copper wire 3 is connected to the overlapping portion 211 .

[0032] Since the influence of the copper sheets 2 and the copper sheets 2 on the capacitance is the greatest at the overlapped portion 211 , the copper wire 3 is arranged here to eliminate the capacitance generated by the copper sheets 2 , so that the low-frequency signal can pass through.

[0033] Preferably, the width of the overlapping portion 211 is X, where the formula for obtaining X is as follows: ; ; Where d is the straight-line distance between the two reflecting surfaces 21, is the dielectric constant, j is the imaginary unit, f is the required adjustment frequency, L is the height of the reflecting surface 21, is the straight line length between the transition portion 22 and the reflecting surface 21 , and D is the width of the vibrator plate 11 .

[0034] Preferably, the overlapping portion 211 is provided with a plurality of welding points 5 along the height direction, and one end of the copper wire 3 is fixed to the welding point 5 .

[0035] Since different lengths of the copper wire 3 will have different effects on the overall inductance distribution of the oscillator plate 11 , the user can determine the position of the copper wire 3 welded at the welding point 5 according to the size specifications of the oscillator plate 11 to meet the communication requirements.

[0036] Preferably, it also includes a support plate 6, which is fixed to the edge of the oscillator plate 11, and the outer contour of the support plate 6 fits the inner contour of the combination of the transition portion 22 and the reflective surface 21, and the support plate 6 is fixedly connected to the memory of the copper sheet 2.

[0037] If the antenna is used on a dynamic device such as a drone, the antenna will shake due to the movement of the device. At this time, the copper sheet 2 may shake or deform, which ultimately affects the frequency of the antenna. If this problem needs to be solved, the thickness of the copper sheet 2 needs to be increased, but the cost of this approach is relatively high. For this reason, in the present invention, the support plate 6 is a glass fiber epoxy resin substrate with excellent mechanical strength, which can provide support for the copper sheet 2 so that the copper sheet 2 will not deform when subjected to external force. The electrical texture of the copper sheet 2 is located on the outside, and the support plate 6 is located on the inside of the copper sheet 2 for support, which will not affect the electrical texture of the copper wire 3, greatly improving the practicality of the antenna.

[0038] Preferably, it further comprises a damper 7, one end of the damper 7 is fixed to the fixing member 4, and the other end of the damper 7 is fixed to a side of the support plate 6 facing the vibrator plate 11; The internal connection point between the transition portion 22 and the oscillator plate 11 is taken as the first endpoint, the connection point between the transition portion 22 and the reflecting surface 21 is taken as the second endpoint, and the line connecting the first endpoint and the second endpoint is taken as the reference line 10. The length direction of the damper 7 is set horizontally with the length direction of the reference line 10.

[0039] Due to the addition of the support plate 6, the mechanical strength of the copper sheet 2 is increased, so that it will not deform when subjected to external force. However, due to cost and space constraints, the thickness of the support plate 6 will not be too thick, and its shape is the same as the inner contour of the combination of the transition portion 22 and the reflective surface 21, which is a bent shape. When subjected to external force in the Y direction, shaking still occurs. During the shaking process, the copper sheets 2 on the left and right sides of the vibrator plate 11 have uneven mass distribution in the forward direction, thereby destroying the symmetry of the vibrator plate 11, and may excite high-order vibration modes, thereby affecting the frequency. For this reason, in the present invention, a damper 7 is provided, and the damper 7 is used to offset the external force in the Y direction, so that the position of the copper sheet 2 can be kept consistent. Due to the influence of the shape of the copper sheet 2, when subjected to external force, the reflective surface 21 mainly shakes toward the transition portion 22, so the length direction of the damper 7 is horizontally arranged with the length direction of the reference line 10. At this time, the movement direction of the damper 7 is consistent with the force direction of the copper sheet 2, which better prevents the copper sheet 2 from shaking.

[0040] It is worth mentioning that the fixing part 4 can be a combination of a bolt and a nut, and one end of the damper 7 is fixed to the fixing part 4, which can avoid setting up an additional space on the oscillator plate 11 for connecting the damper 7, thereby ensuring that the antenna can maintain a relatively small size.

[0041] Preferably, the surface of the vibrator plate 11 is coated with solder resist green oil, which can prevent rust and corrosion, thereby increasing the service life of the vibrator plate 11; The vibrator plate 11 is further provided with two slots 8, the slots 8 are symmetrically arranged along the solder resist green oil, the slots 8 are located below the copper sheet 2, and the length direction of the slots 8 is consistent with the height direction of the vibrator plate 11; The width e of the slot 8 is smaller than the width E of the vibrator plate 11 beside the slot 8 .

[0042] Slot 8 can be regarded as an impedance discontinuity point on the transmission line, and the user can adjust the length of slot 8 according to his own filtering requirements. At this time, slot 8 will introduce parallel reactance at a specific frequency point, resulting in impedance mismatch. Impedance mismatch will cause the signal to be reflected at slot 8 instead of radiating into free space, thereby filtering out the frequency component and achieving a filtering effect.

[0043] In addition, since the support plate 6, copper sheet 2, damper 7 and other equipment are installed on the vibrator plate 11, the weight above the vibrator plate 11 is greater than the weight below. The center of gravity of the vibrator plate 11 is displaced upward as a whole, which weakens the ability of the bottom of the vibrator plate 11 to resist tipping. When subjected to external force, the bottom of the vibrator plate 11 may break. The setting of the slot 8 can change the bottom of the vibrator plate 11 from a single support point to multiple force fulcrums, reduce local stress concentration, and reduce single point failure, thereby reducing the risk of vibrator plate 11 breaking.

[0044] Preferably, the cross section of the slot 8 is I-shaped.

[0045] The upper and lower horizontal parts of the I-shaped flange distribute the material in a position far away from the neutral axis, which significantly increases the moment of inertia. The bending stress is inversely proportional to the moment of inertia of the section, which can greatly enhance the bending resistance of the bottom of the vibrator plate 11.

[0046] Preferably, it further comprises a shell 9 , which is detachably connected to the base 1 , and wraps the oscillator plate 11 and the copper sheet 2 in the shell 9 .

[0047] The important components of the antenna are wrapped and protected by the outer shell 9, thereby reducing the impact of the internal components of the device on the antenna components.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0049] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An ultra-wideband monopole omnidirectional antenna, characterized in that: include: A base, with a vibrator plate installed on the top of the base; A copper sheet is symmetrically bent and arranged on the left and right sides of the vibrator plate, and the copper sheet is provided with a reflecting surface, and the forward projection of the reflecting surface falls on the vibrator plate; A copper wire, one end of which is connected to the reflecting surface, and the other end of which is detachably connected to the vibrator plate.

2. The ultra-wideband monopole omnidirectional antenna according to claim 1, characterized in that: The copper sheet also includes a mounting portion and a transition portion, wherein the mounting portion is fixed to an end edge of the oscillator plate through a fixing member, the mounting portion is connected to the transition portion at a side edge of the oscillator plate, and the transition portion is connected to the reflecting surface at the other side of the oscillator plate.

3. The ultra-wideband monopole omnidirectional antenna according to claim 1, characterized in that: The reflecting surface includes an overlapping portion, and the overlapping portion is a portion where the orthographic projections of the two reflecting surfaces on the vibrator plate overlap; The copper wire is connected to the overlapping portion.

4. The ultra-wideband monopole omnidirectional antenna according to claim 3, characterized in that: The width of the overlapped portion is X, where the formula for obtaining X is as follows: ； ； Where d is the straight-line distance between the two reflecting surfaces, is the dielectric constant, j is the imaginary unit, f is the required adjustment frequency, L is the height of the reflecting surface, is the straight line length between the transition part and the reflecting surface, and D is the width of the oscillator plate.

5. The ultra-wideband monopole omnidirectional antenna according to claim 3, characterized in that: The overlapping portion is provided with a plurality of welding points along the height direction, and one end of the copper wire is fixed to the welding point.

6. The ultra-wideband monopole omnidirectional antenna according to claim 2, characterized in that: It also includes a support plate, which is fixed to the edge of the vibrator plate, and the outer contour of the support plate fits the inner contour of the combination of the transition part and the reflective surface, and the support plate is fixedly connected to the internal structure of the copper sheet.

7. The ultra-wideband monopole omnidirectional antenna according to claim 6, characterized in that: It also includes a damper, one end of which is fixed to the fixing member, and the other end of which is fixed to a side of the support plate facing the vibrator plate; The internal connection point between the transition part and the vibrator plate is taken as the first endpoint, the connection point between the transition part and the reflecting surface is taken as the second endpoint, and the line connecting the first endpoint and the second endpoint is taken as the reference line. The length direction of the damper is set horizontally with the length direction of the reference line.

8. The ultra-wideband monopole omnidirectional antenna according to claim 1 or 7, characterized in that: The surface of the vibrator plate is coated with solder resist green oil; The vibrator plate is further provided with two slots, the slots are symmetrically arranged along the solder resist green oil, the slots are located below the copper sheet, and the length direction of the slots is consistent with the height direction of the vibrator plate; The width e of the slot is smaller than the width E of the vibrator plate beside the slot.

9. The ultra-wideband monopole omnidirectional antenna according to claim 8, characterized in that: The cross section of the slot is I-shaped.

10. The ultra-wideband monopole omnidirectional antenna according to claim 1 or 7, characterized in that: It also includes a shell, which is detachably connected to the base, and the vibrator plate and the copper sheet are wrapped in the shell.

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