Micro coaxial ultra wide band magnetoelectric dipole antenna, array and microwave system

Abstract

The invention discloses a micro coaxial ultra wide band magnetoelectric dipole antenna, array and microwave system.The micro coaxial ultra wide band magnetoelectric dipole antenna comprises a metal floor, a pair of parallel vertical arms, a pair of horizontal radiation patches, an inner core and a bending pin, the bottom ends of the vertical arms are fixedly connected with the metal floor, and the bottom ends of the horizontal radiation patches are fixedly connected with the metal floor; the horizontal radiation patch is connected with the top end of the vertical arm, the vertical arm is arranged at two sides of the inner core, and the bent pin is connected with the inner core and the horizontal radiation patch at one side of the inner core; the horizontal radiation patch is parallel to the metal floor, and the horizontal radiation patch and the vertical arm are mutually orthogonal in space; high-frequency loss is remarkably reduced based on the micro-coaxial technology, ultra-wide-band work of the antenna array is achieved through collaborative optimization design of the asymmetric vertical arm spacing, the ultra-thin bent pins and the T-shaped matching lines, the low cross polarization characteristic is kept under high gain, and the ultra-wide-band antenna array is suitable for a millimeter wave ultra-wide-band communication system.

Description

Technical Field

[0001] This invention relates to the field of antenna technology, and in particular to a micro-coaxial ultrawideband magnetoelectric dipole antenna, array, and microwave system. Background Technology

[0002] With the rapid development of fifth-generation (5G) and future sixth-generation (6G) wireless communication, high-precision millimeter-wave radar, and high-speed short-range communication technologies, higher demands are being placed on antenna systems operating in the millimeter-wave band (typically 30GHz to 300GHz). These applications urgently require antennas to possess ultra-wideband (UWB) characteristics, low profile, high gain, stable directivity, and low cross-polarization to achieve high-speed data transmission, high resolution, and anti-interference capabilities. Traditional broadband antennas, such as horn antennas and Vivaldi antennas, while offering wide bandwidth, are often too large and difficult to integrate in the millimeter-wave band. Microstrip patch antennas are easy to integrate, but their inherent narrow bandwidth, low gain, and surface wave loss make them unsuitable for the requirements of ultra-wideband millimeter-wave systems.

[0003] As a broadband radiating structure, the magnetoelectric dipole antenna exhibits significant potential in broadband designs due to its unique complementary radiation mechanism—simultaneously exciting electric and magnetic dipoles to form a symmetrical radiation pattern, resulting in a wide beam and good backlobe suppression. However, the feed networks of traditional magnetoelectric dipole antennas often employ microstrip lines or coplanar waveguides, which can easily introduce significant transmission losses and dispersion effects in the millimeter-wave band. Furthermore, the complex balun structure or vertical feed conversion significantly increases design complexity and profile height, limiting its application in compact systems.

[0004] In the millimeter-wave band, microcoaxial technology exhibits significant advantages. Its core lies in the use of an air-filled copper-based rectangular microcoaxial structure, fabricated with micrometer-level high precision using microelectromechanical systems (MEMS) technology. This structure, with its near-fully enclosed electromagnetic shielding characteristics, effectively suppresses inter-line coupling and external interference, solving the crosstalk problem inherent in traditional open or semi-open structures such as microstrip lines and coplanar waveguides. Simultaneously, the air dielectric and all-copper conductor design significantly reduces transmission loss, achieving a loss as low as 0.3 dB / cm in the 100 GHz band, far superior to planar transmission lines relying on dielectric substrates, significantly improving signal transmission efficiency. Its multi-layer stacking process is compatible with three-dimensional integration, enabling flexible impedance design to meet the high isolation requirements of complex feed networks and power dividers. Furthermore, the thermal conductivity of the all-metal structure supports efficient heat dissipation, increasing power capacity by 1-2 orders of magnitude. Combined with the miniaturization capabilities of the process, it becomes an ideal solution for millimeter-wave antenna feeding and power distribution networks, significantly improving system integration and overall efficiency while reducing mutual coupling and suppressing crosstalk.

[0005] Patent CN111710982A discloses a novel broadband magnetic dipole antenna, comprising a ground layer, a pair of metal patches, and a bent feed line. The ground layer is a square piece, and the two metal patches are right-angled metal pieces mirror images of the ground layer. A bent feed line is disposed between the two metal patches, and the two metal patches have symmetrically arranged transverse bending recesses. Three rectangular resonant windows are evenly distributed horizontally on the metal patches. The bent feed line is at the same height as the metal patches, and its bottom is connected to the inner core of a coaxial line. The bent feed line has a first bending portion, a second bending portion, a third bending portion, and a fourth bending portion arranged sequentially on it. However, its focus on optimizing broadband performance in the low-frequency band (1.44-3.19GHz) results in low space utilization due to its large 150mm×150mm grounding layer design. The 30mm height limits device integration, and its high-frequency expansion capability is insufficient, with gain dropping sharply to 7.8dBi above 3GHz. The overall solution fails to meet the high integration and wide bandwidth requirements of the millimeter-wave band.

[0006] Therefore, developing an antenna unit and array that combines a micro-coaxial broadband feed network with a magnetoelectric dipole radiator to achieve ultra-wideband operation, high radiation efficiency, and compact integration in the millimeter-wave band has become a key technological breakthrough direction to meet the needs of future ultra-high-speed communication and sensing systems. Summary of the Invention

[0007] The purpose of this invention is to provide a micro-coaxial ultrawideband magnetoelectric dipole antenna array to solve one or more of the aforementioned technical problems. This technical solution features ultrawide operating bandwidth, high gain, and compact structure, and is suitable for various microwave systems, especially in military fields such as radar and satellite communications, where it has significant application value.

[0008] To achieve the above objectives, in a first aspect, the present invention provides a micro-coaxial ultrawideband magnetoelectric dipole antenna unit, comprising a metal ground plane, a pair of parallel vertical arms, a pair of horizontal radiating patches, an inner core, and a bent pin. The bottom end of the vertical arms is fixedly connected to the metal ground plane, and the horizontal radiating patches are connected to the top end of the vertical arms. The vertical arms are disposed on both sides of the inner core, and the bent pin connects the inner core to the horizontal radiating patch on one side of the inner core. The horizontal radiating patches are parallel to the metal ground plane and are spatially orthogonal to the vertical arms.

[0009] Furthermore, the distance between the inner core and its two vertical arms is different.

[0010] Furthermore, the cross-section of the inner core is rectangular, and the bent pin is located at the center of the end of the inner core, with the bent pin positioned on the side with the larger spacing.

[0011] Secondly, the present invention provides a micro-coaxial ultra-wideband magnetoelectric dipole antenna array, comprising a micro-coaxial power divider and a magnetoelectric dipole antenna element; the magnetoelectric dipole antenna element adopts the aforementioned micro-coaxial ultra-wideband magnetoelectric dipole antenna element; the micro-coaxial power divider includes a micro-coaxial inner conductor and an outer conductor arranged coaxially, the micro-coaxial power divider performs impedance transformation through two-stage quarter-wavelength T-type impedance matching lines, and forms four output ports, with a metal ground plane connected to the outer conductor; the micro-coaxial inner conductor at the port of the micro-coaxial power divider extends outward by a predetermined length as the inner core of the magnetoelectric dipole antenna element.

[0012] Furthermore, a nine-layer process of micro-metal additive manufacturing is used to form the micro-coaxial power divider. Multiple SU-8 support structures are spaced apart along the extension direction of the inner conductor of the micro-coaxial structure. The SU-8 support structure connects the inner conductor and outer conductor of the micro-coaxial structure. The SU-8 support structure is made of epoxy resin-based negative photoresist with a thickness of 0.04 mm.

[0013] Furthermore, the outer conductor of the micro coaxial power divider is provided with multiple rectangular release holes spaced apart, and the release holes are symmetrically distributed about the inner conductor of the micro coaxial power divider.

[0014] Furthermore, the inner and outer conductors of the microcoaxial power divider, as well as the magnetoelectric dipole antenna, are all made of copper; the inner conductor and core of the microcoaxial power divider have a thickness of 0.3 mm, the bent pins have a thickness of 0.1 mm, and the outer conductor magnetoelectric dipole antenna has a thickness of 0.9 mm.

[0015] Furthermore, the quarter-wavelength T-type impedance matching line includes three micro-coaxial inner conductors: a first segment with a width of 0.485 mm and a length of 1.3 mm, a second segment with a width of 0.175 mm and a length of 1 mm, and a third segment with a width of 0.175 mm and a length of 1 mm; the micro-coaxial inner conductors are connected at the bends by a 45° chamfer with a length of 0.565 mm, and the spacing between the four output ports is 3.6 mm.

[0016] Furthermore, the metal floor is formed by the extension of the outer conductors at the four output ports of the micro coaxial power divider.

[0017] Furthermore, the input port of the micro coaxial power divider is equipped with a coaxial matching interface that is compatible with a standard connector. At the coaxial matching interface, cylindrical protrusions and strip protrusions are respectively provided on three surfaces along the length of the inner conductor of the micro coaxial cable. A cylindrical protrusion is provided on one of the surfaces, and strip protrusions are provided on the two sides connected to the surface where the cylindrical protrusion is located. A semi-circular notch is opened on the outer conductor on the side corresponding to the cylindrical protrusion.

[0018] Thirdly, the present invention can also provide a microwave system comprising the aforementioned micro-coaxial ultrawideband magnetoelectric dipole antenna array.

[0019] Compared with the prior art, the present invention has the following beneficial effects: A pair of vertical arms of the magnetoelectric dipole antenna element are distributed on both sides of the inner conductor of the micro-coaxial cable to form a magnetic flux loop. The length of the vertical arms determines the resonant frequency of the magnetic dipole. The asymmetric spacing of the vertical arms relative to the inner conductor of the micro-coaxial cable optimizes impedance matching to extend the bandwidth. The horizontal radiating patch is spatially orthogonal to the vertical arms to form an equivalent electric dipole radiation source, and its length affects the resonant frequency of the electric dipole. At the four output ports, bent pins connect the horizontal radiating patch and the inner core to form a direct feeding structure, realizing effective excitation of the electric dipole and the magnetic dipole. The magnetoelectric dipole antenna is directly excited by bent pins. Combined with the asymmetric vertical arm spacing and the ultra-thin pin structure, the operating bandwidth is significantly extended to 81.19%, S11≤-10dB, and the frequency band is from 38.85GHz to 91.95GHz. A 1×4 array is constructed through a micro-coaxial power divider to improve the maximum gain to 13.38dBi, achieving 2.36 octave ultra-wideband operation.

[0020] Furthermore, the copper structure formed by the nine-layer process of micro-metal additive manufacturing has the advantages of lower loss and wider bandwidth compared with microstrip antennas and substrate integrated waveguide antennas. In addition, the high electrical conductivity of copper material significantly reduces ohmic loss, and the excellent thermal conductivity ensures thermal stability under high power conditions.

[0021] Furthermore, the axially arranged SU-8 support structure forms a quasi-rigid frame, whose high elastic modulus can resist temperature changes and mechanical stress deformation, while the near-air dielectric constant minimizes TEM wave transmission disturbances. Furthermore, the symmetrical release hole design of the outer conductor ensures uniform diffusion of the etchant in the micro-metal additive manufacturing process, avoids residues, and relaxes the alignment tolerance. Furthermore, the coaxial matching interface achieves mutual matching between the input port of the micro coaxial power divider and the 1mm connector through a stepped impedance structure consisting of an inner conductor cylindrical protrusion and an outer conductor semi-circular notch. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art are briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, such as changing the power supply position, changing the number and height of processing layers, changing the SU8 support structure, changing the operating frequency range, changing the shape and size of the gap, etc. It is obvious that physical structure and corresponding electrical performance modifications can be made by those skilled in the art.

[0023] Figure 1The schematic diagram illustrates a three-dimensional structure of a micro-coaxial ultrawideband magnetoelectric dipole antenna array according to an embodiment of the present invention. Figure 2 A perspective top view of a micro-coaxial ultrawideband magnetoelectric dipole antenna array according to an embodiment of the present invention is shown schematically. Figure 3 A perspective side view of a micro-coaxial ultrawideband magnetoelectric dipole antenna array according to an embodiment of the present invention is shown schematically. Figure 4 The diagram illustrates the return loss of a micro-coaxial ultrawideband magnetoelectric dipole antenna array according to an embodiment of the present invention as a function of frequency. Figure 5 The diagram illustrates the gain as a function of frequency for a micro-coaxial ultrawideband magnetoelectric dipole antenna array according to an embodiment of the present invention. Figure 6 The diagram schematically illustrates the E-plane radiation patterns of the micro-coaxial ultrawideband magnetoelectric dipole antenna array according to an embodiment of the present invention, with frequencies of: Figure (a) 40 GHz, Figure (b) 50 GHz, Figure (c) 60 GHz, Figure (d) 70 GHz, Figure (e) 80 GHz, and Figure (f) 90 GHz.

[0024] Figure 7 The H-plane radiation patterns of the micro-coaxial ultrawideband magnetoelectric dipole antenna array according to an embodiment of the present invention are schematically shown, with frequencies of 40 GHz in Figure (a), 50 GHz in Figure (b), 60 GHz in Figure (c), 70 GHz in Figure (d), 80 GHz in Figure (e), and 90 GHz in Figure (f).

[0025] In the attached diagram, 1-micro coaxial power divider, 2-metal ground plane, 3-magnetic dipole antenna element, 4-vertical arm, 5-horizontal radiating patch, 6-inner core, 7-bent pin, 8-outer conductor, 9-quarter-wavelength T-type impedance matching line, 10-SU-8 support structure, 11-rectangular release hole. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0027] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] The present invention will now be described in further detail with reference to the accompanying drawings: This invention discloses a micro-coaxial ultrawideband magnetoelectric dipole antenna array, comprising a micro-coaxial power divider 1, a metal ground plane 2, a magnetoelectric dipole antenna element 3, vertical arms 4, horizontal radiating patches 5, a micro-coaxial inner conductor, bent pins 7, an outer conductor 8, a quarter-wavelength T-type impedance matching line 9, an SU-8 support structure 10, and a rectangular release hole 11. The micro-coaxial power divider 1 expands a single input port into four output ports via two stages of quarter-wavelength T-type impedance matching lines 9. The four output ports are connected to each output port of the magnetoelectric dipole antenna element 3. A pair of vertical arms 4 and a pair of horizontal radiating patches 5 are disposed on the metal ground plane 2. The horizontal radiating patches 5 are parallel to the metal ground plane 2. One end of the vertical arm 4 is connected to the metal ground plane 2, and the other end is connected to the horizontal radiating patch 5. The vertical arm 4 is perpendicular to the metal ground plane 2. The inner core 6 is spaced differently from the vertical arms 4 on both sides. At each output port, a bent pin 7 connects the inner core 6 and the horizontal radiating patch 5. The microcoaxial power divider 1 comprises an inner microcoaxial conductor and an outer microcoaxial conductor 8. The inner microcoaxial conductor is suspended at the central axis of the outer conductor 8 via an SU-8 support structure 10. The input port of the microcoaxial power divider 1 is equipped with a coaxial matching interface to be matched with a standard connector (such as a 1mm standard connector). At the coaxial matching interface, a cylindrical protrusion is provided on the inner microcoaxial conductor, and a semi-circular notch is provided on the outer conductor 8. Rectangular release holes 11 are symmetrically opened on the outer conductor 8 of the microcoaxial power divider 1, and are symmetrical about the inner microcoaxial conductor 6. Several rectangular release holes 11 are evenly opened on the outer conductor 8. The metal ground plane 2 provides a grounding reference surface and suppresses back radiation. A pair of vertical arms 4 of the magnetoelectric dipole antenna element 3 are distributed on both sides of the micro-coaxial inner conductor to form a magnetic flux loop. The length of the vertical arms 4 determines the resonant frequency of the magnetic dipole. The asymmetric spacing of the vertical arms 4 relative to the inner core 6 optimizes impedance matching to expand the bandwidth. The horizontal radiating patch 5 is spatially orthogonal to the vertical arms 4 to form an equivalent electric dipole radiation source. Its length affects the resonant frequency of the electric dipole. At the four output ports, the bent pins 7 connect the horizontal radiating patch 5 and the inner core 6 to form a direct feeding structure, realizing effective excitation of the electric dipole and the magnetic dipole.

[0029] The key parameters have been optimized as follows: the thickness of the SU-8 support structure 10 is... h 3 = 0.04 mm, relative permittivity is 3, loss tangent is 0.045°, and its influence on the electromagnetic performance of the antenna array is negligible; the length of a pair of vertical arms 4 of the magnetoelectric dipole antenna element 3 is... H 1 = 1.08 mm, width is t 1 = 0.3 mm, the length of the horizontal radiating patch 5 is H 2 = 1.03 mm, width is t 2 = 0.1 mm, the lengths of the vertical arm 4 and the horizontal radiating patch 5 affect the resonant frequency of the magnetoelectric dipole antenna element 3; the distances between the inner core 6 and its two sides of the vertical arms 4 are respectively s1 = 0.19 mm s 2 = 0.26mm, the thickness of the bent structure 7 used for power supply is... h 4 = 0.1 mm, the three work together to optimize impedance matching and radiation characteristics.

[0030] In the aforementioned micro-coaxial ultra-wideband magnetoelectric dipole antenna array, the excitation signal is input through the input port of the micro-coaxial power divider 1, transmitted to the magnetoelectric dipole antenna element 3 via two-stage quarter-wavelength T-type impedance matching lines 9, and radiated outwards along the vertical arm 4 and the horizontal radiating patch 5. The micro-coaxial inner conductors smoothly transition at 45° bends to reduce reflection; the quarter-wavelength T-type impedance matching lines 9 are composed of three irregularly shaped micro-coaxial inner conductors to achieve broadband matching; the bent pins 7 and the vertical arm 4 together form a coaxial balun structure, exciting a current in the same direction on the horizontal radiating patch 5, thus effectively exciting the magnetoelectric dipole antenna element 3 with a simple structure. The quarter-wavelength T-type impedance matching line 9 includes three micro-coaxial inner conductors: a first section with a width of 0.485 mm and a length of 1.3 mm, a second section with a width of 0.175 mm and a length of 1 mm, and a third section with a width of 0.175 mm and a length of 1 mm; the micro-coaxial inner conductors are connected at the bends by a 45° chamfer with a length of 0.565 mm, and the spacing between the four output ports is 3.6 mm.

[0031] To verify the effectiveness of the aforementioned micro-coaxial ultrawideband magnetoelectric dipole antenna element and antenna array, the following structural dimensions are used as an example for illustration: Please see Figures 1 to 7 This illustration schematically shows a three-dimensional structural diagram of a micro-coaxial ultra-wideband magnetoelectric dipole antenna array according to an embodiment of the present invention. The micro-coaxial ultra-wideband magnetoelectric dipole antenna array disclosed in this embodiment includes: a micro-coaxial power divider 1, a metal ground plane 2, magnetoelectric dipole antenna elements 3, a pair of vertical arms 4 on the ground plane, a pair of horizontal radiating patches 5 parallel to the ground plane, a micro-coaxial inner conductor, bent pins 7 connecting the inner core 6 and the horizontal radiating patches 5, an outer conductor 8, a quarter-wavelength T-type impedance matching line 9, an SU-8 support structure 10, and rectangular release holes 11. The micro-coaxial ultra-wideband magnetoelectric dipole antenna array is fabricated using a nine-layer process, wherein multiple SU-8 support structures 10 are located in the fifth layer of the nine-layer micro-coaxial structure, and multiple rectangular release holes 11 are located on the outer wall of the micro-coaxial power divider 1. Figure 2 , Figure 3 The schematic diagrams show a top perspective view and a side perspective view of the micro-coaxial ultrawideband magnetoelectric dipole antenna array according to an embodiment of the present invention. The thicknesses of the micro-coaxial inner conductor and inner core 6 are shown in the figures. h 2 = 0.3mm, width is w 1 = 0.33mm, the thickness of outer conductor 8 and metal ground plane 2 is h1 = 0.9 mm, the overall thickness of magnetoelectric dipole antenna element 3 is h 1 = 0.9 mm; Length of the 45° chamfer at the bend of the inner conductor of the micro-coaxial cable. l 4 = 0.565 mm; quarter-wavelength T-type impedance matching line 9 has a width of w 2 = 0.485 mm and w 3 = 0.175 mm, length is l 1 = 1.3mm l A micro-coaxial inner conductor connection of 2=1mm is used to optimize impedance matching; the two-stage matching lines are connected by a width of w 1, with lengths respectively l 3 = 2.268 mm and l A 0.535mm bent micro-coaxial cable is connected; the micro-coaxial power divider 1 uses a width of... w 1, with lengths respectively l 6 = 0.468 mm and l A 1.45mm bent micro-coaxial cable is connected to magnetoelectric dipole antenna element 3; the distance between magnetoelectric dipole antenna elements... d =3.6mm.

[0032] Figure 4 The schematic diagram illustrates the operating frequency band of the micro-coaxial ultrawideband magnetoelectric dipole antenna array according to an embodiment of the present invention. The return loss of the micro-coaxial ultrawideband magnetoelectric dipole antenna array is greater than 10 dB between 38.85 GHz and 91.95 GHz.

[0033] Figure 5 The schematic diagram illustrates the achievable gain of the micro-coaxial ultrawideband magnetoelectric dipole antenna array in the operating frequency band according to an embodiment of the present invention. The achievable gain of the micro-coaxial ultrawideband magnetoelectric dipole antenna array in the operating frequency band is better than 10.53 dBi, and the maximum achievable gain is 13.38 dBi.

[0034] Figure 6 and Figure 7 The diagram illustrates the E-plane and H-plane radiation patterns of the micro-coaxial ultrawideband magnetoelectric dipole antenna array of an embodiment of the present invention at 40 GHz, 50 GHz, 60 GHz, 70 GHz, 80 GHz and 90 GHz, showing the broadband radiation characteristics of the antenna array (38.85 GHz to 91.95 GHz), the impedance bandwidth of the antenna array is about 81.19%, and it has low cross-polarization.

[0035] In summary, this embodiment of the invention uses a micro-coaxial power divider 1 to connect four groups of magnetoelectric dipole antenna elements 3 to form an array. The inner conductor of the micro-coaxial antenna is fixed to the axis of the outer conductor 8 via an SU-8 support structure 10. Rectangular release holes 11 are symmetrically distributed. The magnetoelectric dipole antenna element 3 includes vertical arms 4 with asymmetrical spacing and orthogonal horizontal radiating patches 5. Bent pins 7 enable direct feeding. This invention reduces transmission loss through the micro-coaxial structure. Combined with optimized vertical arm spacing, bent pin feeding structure, and T-shaped impedance matching line design, it achieves ultra-wideband (38.85GHz to 91.95GHz, impedance bandwidth of approximately 81.19%) impedance matching and radiation characteristics, obtaining high gain (up to 13.38dBi) and low cross-polarization performance within the operating frequency band, while maintaining a relatively simplified structure.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A micro-coaxial ultrawideband magnetoelectric dipole antenna element, characterized in that, It includes a metal floor (2), a pair of parallel vertical arms (4), a pair of horizontal radiating patches (5), an inner core (6), and a bent pin (7). The bottom end of the vertical arm (4) is fixedly connected to the metal floor (2), the horizontal radiating patch (5) is connected to the top end of the vertical arm (4), the vertical arm (4) is set on both sides of the inner core (6), and the bent pin (7) connects the inner core (6) to the horizontal radiating patch (5) on one side of the inner core (6). The horizontal radiating patch (5) is parallel to the metal floor (2) and is orthogonal to the vertical arm (4) in space. The spacing between the inner core (6) and the vertical arms (4) on both sides is different.

2. The micro-coaxial ultrawideband magnetoelectric dipole antenna element according to claim 1, characterized in that, The cross-section of the inner core (6) is rectangular, and the bent pin (7) is located at the center of the end of the inner core (6). The bent pin (7) is set on the side with a larger spacing.

3. A micro-coaxial ultrawideband magnetoelectric dipole antenna array, characterized in that, It includes a micro-coaxial power divider (1) and a magnetoelectric dipole antenna unit (3); the magnetoelectric dipole antenna unit (3) adopts the micro-coaxial ultra-wideband magnetoelectric dipole antenna unit as described in claim 1 or 2; the micro-coaxial power divider (1) includes a micro-coaxial inner conductor and an outer conductor (8) arranged coaxially, the micro-coaxial power divider (1) performs impedance transformation through two-stage quarter-wavelength T-type impedance matching lines (9) and forms four output ports, the metal ground plane (2) is connected to the outer conductor (8); the micro-coaxial inner conductor at the port of the micro-coaxial power divider (1) extends outward by a set length as the inner core (6) of the magnetoelectric dipole antenna unit (3).

4. The micro-coaxial ultrawideband magnetoelectric dipole antenna array according to claim 3, characterized in that, The micro-metal additive manufacturing process is used to form a nine-layer micro-coaxial power divider (1). Multiple SU-8 support structures (10) are set at intervals along the extension direction of the inner conductor of the micro-coaxial structure. The SU-8 support structure (10) connects the inner conductor and outer conductor (8) of the micro-coaxial structure. The SU-8 support structure (10) is made of epoxy resin-based negative photoresist with a thickness of 0.04 mm.

5. The micro-coaxial ultrawideband magnetoelectric dipole antenna array according to claim 3, characterized in that, Multiple rectangular release holes (11) are spaced apart on the outer conductor (8) of the micro coaxial power divider (1), and the release holes (11) are symmetrically distributed about the inner conductor of the micro coaxial power divider.

6. The micro-coaxial ultrawideband magnetoelectric dipole antenna array according to claim 3, characterized in that, The inner and outer conductors (8) of the micro-coaxial power divider (1) and the magnetoelectric dipole antenna (3) are all made of copper; the inner conductor and inner core (6) of the micro-coaxial power divider (1) are 0.3 mm thick, the bent pin (7) is 0.1 mm thick, and the outer conductor (8) and the magnetoelectric dipole antenna (3) are 0.9 mm thick.

7. The micro-coaxial ultrawideband magnetoelectric dipole antenna array according to claim 3, characterized in that, The quarter-wavelength T-type impedance matching line (9) includes three micro-coaxial inner conductors: a first section with a width of 0.485 mm and a length of 1.3 mm, a second section with a width of 0.175 mm and a length of 1 mm, and a third section with a width of 0.175 mm and a length of 1 mm; the micro-coaxial inner conductors are connected at the bends by a 45° chamfer with a length of 0.565 mm, and the spacing between the four output ports is 3.6 mm.

8. The micro-coaxial ultrawideband magnetoelectric dipole antenna array according to claim 3, characterized in that, The metal floor (2) is formed by the extension of the outer conductor (8) at the four output port positions of the micro coaxial power divider (1).

9. The micro-coaxial ultrawideband magnetoelectric dipole antenna array according to claim 3, characterized in that, The input port of the micro coaxial power divider (1) is set with a coaxial matching interface to match the standard connector. At the coaxial matching interface, cylindrical protrusions and strip protrusions are respectively set on three surfaces along the length of the inner conductor of the micro coaxial power divider. A cylindrical protrusion is set on one of the surfaces. Strip protrusions are set on the two sides connected to the cylindrical protrusion. A semi-circular notch is opened on the outer conductor (8) corresponding to the cylindrical protrusion.

10. A microwave system, characterized in that, Including the micro-coaxial ultrawideband magnetoelectric dipole antenna array as described in any one of claims 4-9.

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