CN214477886U

CN214477886U - Waveguide structure linear polarization complementary source antenna based on 3D printing technology

Info

Publication number: CN214477886U
Application number: CN202022361701.1U
Authority: CN
Inventors: 马自龙; 张楚唯
Original assignee: South China University of Technology SCUT
Current assignee: South China University of Technology SCUT
Priority date: 2020-10-21
Filing date: 2020-10-21
Publication date: 2021-10-22
Anticipated expiration: 2030-10-21

Abstract

The utility model discloses a complementary source antenna of waveguide structure linear polarization based on 3D printing technique, including rectangle dielectric block, two rectangle dielectric thin slices, TE₁₀The waveguide power divider comprises a mode rectangular open waveguide, an E-surface T-shaped junction waveguide power divider and two coaxial connectors; wherein the rectangular dielectric block is located at the top of the antenna and TE₁₀The mode rectangular open waveguides are connected; TE₁₀The lower part of the mode rectangular open waveguide is connected with an E-surface T-shaped junction waveguide power divider; two rectangular dielectric sheets with structural parameters in complete phaseSimultaneously, adhering TE₁₀The wide sides of the cross section of the mode rectangular open waveguide are symmetrically arranged at the opening connected with the rectangular dielectric block and connected with the TE₁₀The mode rectangular open waveguides are connected; the lower part of the E-surface T-shaped junction waveguide power divider is connected with two coaxial connectors. The antenna effectively solves the problem of performance sensitivity caused by errors in later processing of the traditional microwave frequency band complementary source antenna, and has the advantages of simple structure, easiness in processing, rapid forming and light weight.

Description

Waveguide structure linear polarization complementary source antenna based on 3D printing technology

Technical Field

The utility model relates to the field of antenna technology, in particular to complementary source antenna of waveguide structure linear polarization based on 3D printing technique.

Background

The 3D printing technique is a rapid prototyping technique aimed at building structures by sequentially layering deposition, extrusion, sintering raw materials. Different from the traditional CNC process of machining objects in a material reducing mode, the 3D printing method of building the needed structure in a material increasing mode can avoid waste of raw materials to a great extent. Through the three-dimensional model file, the 3D printing technology can be competent in the processing of various complicated and special-shaped structures, has very short processing cycle simultaneously, can save manpower and material resources by a wide margin. Currently, 3D printing technology has certain applications in the field of antennas, for example: some of these products have been successfully commercialized using transmissive arrays of dielectric materials, prism designs, and horn antennas, microstrip antennas, etc. printed using 3D metal materials. Therefore, 3D printing technology has been completely exposed in the antenna field and has strong advantages, and antenna design based on this new manufacturing process will become an important development direction for future academic research and commercial application.

In recent years, complementary source antennas have gained widespread attention in both academic and commercial areas. The working principle is that a pair of magnetic dipole antennas and electric dipole antennas which are orthogonally arranged and mutually complement to each other are adopted, so that the unidirectional radiation characteristic of low back lobe is realized. The antenna generally has the advantages of broadband, high gain, stable directional diagram, low back lobe and low cross polarization. In the microwave frequency band, most of the conventional complementary source antennas are open structures. Two pairs of metal patches are usually placed in a vertical and horizontal manner, respectively, and in operation, the two pairs of metal patches play the role of magnetic and electric dipoles, respectively. At the bottom of the antenna, a ground plane or a metal cavity is usually attached as a reflector. The feed circuit is generally a single-ended L-shaped or T-shaped probe or a differential microstrip line.

The conventional microwave frequency band complementary source antenna is complex in structure and is generally formed by assembling a plurality of components. In addition to the PCB process, some post processing is required, such as component assembly, soldering, etc. These post-processing is usually done manually, which is time consuming, labor intensive and prone to unavoidable errors, whereas conventional complementary source antennas are sensitive to these manufacturing errors, and small errors can have a large impact on antenna performance.

Furthermore, most conventional microwave-band complementary source antennas have a certain weight due to the introduction of pure metal structures into the antenna structure, such as magnetic and electric dipoles themselves, metal back cavities (m. j.li and k.m. luk, "a differential-magnetic-inductive-antenna for UWB applications," IEEE trans.antennas, vol.61, No.1, pp.92-99, jan.2013 ], reflectors (h.w.lai, k.k. So, h.wong, c.h.channel, and k.m. luk, "electronic diode antennas with low-inductive slots," IEEE propagation antennas, No. 64, p.8, p.3338, p.38, p.10, p.38, p.10, p.4, p.10, p.4-1, p.10, p.4, p.10, p.4-1, p.4, p.10, p.4, p.10, p.m-1, p.m, p.4, p.m-1, p. 2, p.4, p.m, p. of the antenna, p.4, p.1, p.m, p.4, p. of the antenna, p.4, p. of the antenna, p.1, p.4, p. of the antenna, p.m, p.1, p.m, p.1, p.m, p.4, p.m, p.1, p. of the antenna, p.1, p.m, p. of the antenna, p.m, p. of the antenna, p, p.m, p, p.m, p.1, p. of the antenna, p.m, p. of the antenna, p.4, p.m, p, p.4, p.m, p.4, p.1, p.4, p.m, p.4, p.m, p.1, p.m, p.4, p.m, p.1, p.m, p.4, p.m, "IEEE Antennas Wireless Propag.Lett., vol.8, pp.60-63,2009.), etc. From a system level perspective, the antenna may be too heavy, which may increase the difficulty of integrating the antenna with the communication front-end circuit, thereby adversely affecting practical applications.

The current 3D printed antenna can be roughly classified into two categories, a dielectric material category and a metal material category. The former is mostly used for reflective arrays (b.j.chen, h.yi, k.b.ng, s.w.qu, and c.h.chan, "3D printed reflective antenna at 60GHz," Proceeding of ISAP 2016, nov.24-28,2016, Okinawa, Japan, pp. 92-93.), prisms (h.yi, s.w.qu, k.b.ng, c.h.chan, and x.bai, "3D printed millimeter-wave and terrestrial lens with fixed antenna, and" IEEE tra. Antennas propag, 64, No.2, 442-449, feb.2016) or dielectric rods (j.huang, s.tran. antenna pro, w.745, x.75, w.x.x.t, IEEE, n.68, IEEE, n.t. antenna, x.b.75, and c.31, IEEE, h.75, et al, etc. Antennas, and x.31, 2, n.w.t. The latter, although proposed by waveguide type antenna designs, are mostly air-filled hollow waveguide structures (b.zhang, z.zhan, y.cao, h.gulan, p.linner, j.sun, t.zwick, and h.serrath, "Metallic 3D printed antenna for milemeter-and submillimeter-wave applications," IEEE trans.thz sci.technol., vol.6, No.4, pp.592-600, jul.2016. b.zhang, h.sun, l.wu, y.zu, y.yang, h.zhu, f.f.201, y.he, and k.huang, "a Metallic 3-D printed antenna processing, and" mechanical strain, "c.31, c.68, and" c.r. c. for heavy metal strain, "c.s.68, and" c. for heavy metal strain, c. may be produced by the mechanical strain, IEEE strain, c.738, c. for mechanical strain, c. strain.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem that the complementary source antenna structure of traditional microwave frequency channel is complicated, the complementary source antenna of traditional microwave frequency channel is because the performance that the later stage processing produced is to the problem of machining error sensitivity, the problem that the weight that the complementary source antenna of traditional microwave frequency channel leads to is heavier and 3D prints the problem that metal waveguide structure mechanical properties is not enough, easy deformation because of metal structure's participation.

The purpose of the utility model is realized through one of following technical scheme at least.

A waveguide structure linear polarization complementary source antenna based on a 3D printing technology comprises a rectangular dielectric block, two rectangular dielectric sheets and a TE₁₀The waveguide power divider comprises a mode rectangular open waveguide, an E-surface T-shaped junction waveguide power divider and two coaxial connectors;

wherein the rectangular dielectric block is located at the top of the antenna and TE₁₀The mode rectangular open waveguides are connected; TE₁₀The lower part of the mode rectangular open waveguide is connected with an E-surface T-shaped junction waveguide power divider; the two rectangular dielectric sheets have the same structural parameters and are bonded with TE₁₀The wide sides of the cross section of the mode rectangular open waveguide are symmetrically arranged at the opening connected with the rectangular dielectric block, andTE₁₀the mode rectangular open waveguides are connected; the lower part of the E-surface T-shaped junction waveguide power divider is connected with two coaxial connectors.

Furthermore, in the waveguide structure linear polarization complementary source antenna, except the top surface and four side surfaces of the rectangular dielectric block and the annular cross section between the inner conductor and the outer conductor connected with the E-surface T-junction waveguide power divider and the two coaxial connectors, all the rest surfaces are completely covered with the metal thin layer, and are covered with the metal copper in an electroplating mode.

Further, when the waveguide structure linear polarization complementary source antenna is processed, the waveguide structure linear polarization complementary source antenna is divided into two parts which are respectively subjected to 3D printing, namely a rectangular dielectric block at the top and the rest antenna structure; after 3D printing is finished, arranging a first mask at the joint of the rectangular dielectric block and the rest antenna structure;

two first positioning holes are formed in the bottom of the rectangular dielectric block and are respectively a first positioning hole formed in the bottom of the front half portion of the rectangular dielectric block and a second positioning hole formed in the bottom of the rear half portion of the rectangular dielectric block;

a second positioning hole corresponding to the first positioning hole is arranged in the first mask, the first second positioning hole corresponds to the first positioning hole, and the second positioning hole corresponds to the second first positioning hole;

in the remaining antenna structure, TE₁₀Two positioning columns are arranged at the top opening of the mode rectangular opening waveguide, wherein the first positioning column corresponds to and can be perfectly jointed with the first positioning hole and the first positioning hole, and the second positioning column corresponds to and can be perfectly jointed with the second positioning hole and the second positioning hole

In the rest antenna structure, two probe holes are arranged on the geometric central line of the bottom of the E-surface T-shaped junction waveguide power divider along the wide edge, and the first probe hole and the second probe hole are symmetrically arranged at the waveguide wavelength which is one quarter of the waveguide wavelength away from the tail end of the waveguide respectively;

and arranging second masks at two probe holes of the E-surface T-junction waveguide power divider, wherein the second masks comprise a second first mask arranged at the first probe hole and a second mask arranged at the second probe hole.

Furthermore, after the mask is finished, the rest antenna structure needs to be electroplated, the rectangular dielectric block does not need to be electroplated, finally, the antenna is assembled, the rectangular dielectric block, the rest antenna structure and the two coaxial connectors are bonded by ethyl cyanoacrylate glue, and in the assembling process, the first positioning hole corresponds to the positioning column and can be perfectly jointed; the coaxial connector corresponds to and perfectly engages the probe hole.

Furthermore, the first positioning column corresponds to and can be perfectly jointed with the first positioning hole, and the second positioning column corresponds to and can be perfectly jointed with the second positioning hole, so as to avoid electroplating;

the first second mask and the second mask are jointed with the first probe hole and the second probe hole, so that the probe hole and the cross section of the coaxial line are prevented from being electroplated;

the first mask is rectangular, with cross-section size and TE₁₀The openings of the mode rectangular opening waveguide are the same in size and are arbitrary in height; the second mask comprises a small cylinder with the same size as the probe hole and a large cylinder with the same size as the cross section of the coaxial connector and any height, and the small cylinder is connected with the large cylinder.

Furthermore, the complementary source of the waveguide structure linear polarization complementary source antenna is realized by a pair of magnetic and electric dipoles; wherein the magnetic dipole is formed by TE₁₀Mode rectangular open waveguide, electric dipole is listed in TE₁₀Rectangular dielectric sheets covering the metal thin layers on two sides of the mode rectangular open waveguide;

the magnetic and electric dipoles are orthogonally arranged, when the antenna works, electromagnetic waves generated by the magnetic and electric dipoles in the radiation direction of the antenna are mutually superposed, and the radiation in the direction is enhanced; in the direction of the antenna directional diagram back lobe, electromagnetic waves generated by the magnetic and electric dipoles counteract each other, and the backward radiation of the antenna is reduced; the rectangular dielectric block at the top is used for realizing impedance matching of the antenna; the E-surface T-junction waveguide power divider at the lower end has natural differential characteristics and is used as a differential feed network.

Compared with the prior art, the utility model has the advantages of:

compared with the prior art, the utility model discloses combine together 3D printing technique and complementary source antenna technique, can effectively solve the performance sensitivity problem that traditional microwave frequency channel complementary source antenna leads to because the error in later stage processing, and have simple structure, workable, quick shaping, light in weight's advantage. In the aspect of antenna performance, the utility model has the advantages of broadband (relative bandwidth 46.8%, 7.2-11.6GHz), gain stability (in-band 5.4 +/-1.2 dBi), the directional diagram is stable, low back lobe (directional diagram front-to-back ratio is greater than 22dB), low cross polarization.

Drawings

Fig. 1 is a schematic structural diagram of a waveguide structure linearly polarized complementary source antenna based on a 3D printing technology in an embodiment of the present invention;

fig. 2 is a front view of a waveguide structure linearly polarized complementary source antenna based on 3D printing technology in an embodiment of the present invention;

fig. 3 is a side view of a waveguide structure linearly polarized complementary source antenna based on 3D printing technology in an embodiment of the present invention;

FIG. 4 is a front view of a waveguide structure linearly polarized complementary source antenna in an electroplating process according to an embodiment of the present invention;

FIG. 5 is a side view of a waveguide structure linearly polarized complementary source antenna in an embodiment of the present invention during electroplating;

fig. 6 is a schematic diagram of the impedance matching characteristic of the waveguide structure linearly polarized complementary source antenna based on the 3D printing technology in the embodiment of the present invention;

fig. 7a is a central frequency E plane directional diagram of a waveguide structure linearly polarized complementary source antenna based on 3D printing technology in an embodiment of the present invention;

fig. 7b is a central frequency H plane directional diagram of a waveguide structure linearly polarized complementary source antenna based on 3D printing technology according to an embodiment of the present invention;

fig. 8 is a schematic diagram of the gain characteristic of the waveguide structure linearly polarized complementary source antenna based on the 3D printing technology in the embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings.

Example (b):

a waveguide structure linear polarization complementary source antenna based on 3D printing technology is shown in figures 1, 2 and 3 and comprises a rectangular dielectric block 21, two rectangular dielectric sheets 22 and TE₁₀A mode rectangular open waveguide 23, an E-surface T-junction waveguide power divider 24 and two coaxial connectors 25;

wherein the rectangular dielectric block 21 is located at the top of the antenna and TE₁₀The mode rectangular open waveguides 23; TE₁₀The E-surface T-junction waveguide power divider 24 is connected below the mode rectangular open waveguide 23; the two rectangular dielectric sheets 22 have the same structural parameters and are bonded with TE₁₀The wide side of the cross section of the mode rectangular open waveguide 23 is symmetrically arranged at the opening connected with the rectangular dielectric block 21 and connected with the TE₁₀The mode rectangular open waveguides 23 are connected; the lower part of the E-surface T-junction waveguide power divider 24 is connected with two coaxial connectors 25.

In the waveguide structure linear polarization complementary source antenna, except the top surface and four side surfaces of the rectangular dielectric block 21 and the annular cross section between the inner conductor and the outer conductor connected with the E-surface T-shaped junction waveguide power divider 24 and the two coaxial connectors 25, all the rest surfaces are completely covered with metal thin layers, and are covered with metal copper in an electroplating mode.

As shown in fig. 4 and 5, when the waveguide-structured linear polarization complementary source antenna is processed, the waveguide-structured linear polarization complementary source antenna is divided into two parts, namely a top rectangular dielectric block 21 and a remaining antenna structure 33, which are respectively subjected to 3D printing; after 3D printing is finished, arranging a first mask 34 at the joint of the rectangular medium block 21 and the rest antenna structure 33;

two first positioning holes 36 are arranged at the bottom of the rectangular dielectric block 21, namely a first positioning hole 361 arranged at the bottom of the front half part of the rectangular dielectric block 21 and a second positioning hole 362 arranged at the bottom of the rear half part of the rectangular dielectric block 21;

the first mask 34 is provided with a second positioning hole 37 corresponding to the first positioning hole 36, a first second positioning hole 372 corresponds to the first positioning hole 361, and a second positioning hole 371 corresponds to the second first positioning hole 362;

in the remaining antenna structure 33, TE₁₀Two positioning posts 38 are disposed at the top opening of the patterned rectangular open waveguide 23, wherein the first positioning post 381 corresponds to and can be perfectly engaged with the first positioning hole 361 and the first positioning hole 372, and the second positioning post 382 corresponds to and can be perfectly engaged with the second positioning hole 362 and the second positioning hole 371;

in the rest antenna structure 33, two probe holes 39 are arranged on the geometric center line of the bottom of the E-plane T-junction waveguide power divider 24 along the wide side, and a first probe hole 391 and a second probe hole 392 are symmetrically arranged at the quarter waveguide wavelength away from the tail end of the waveguide respectively;

second masks 35 are disposed at the two probe holes 39 of the E-plane T-junction waveguide power divider 24, including a second first mask 351 disposed at the first probe hole 391 and a second mask 352 disposed at the second probe hole 392.

As shown in fig. 4 and 5, after the mask is completed, the remaining antenna structure 33 needs to be electroplated, the rectangular dielectric block 21 does not need to be electroplated, and finally the antenna is assembled, the rectangular dielectric block 21, the remaining antenna structure 33 and the two coaxial connectors 25 are bonded by using ethyl cyanoacrylate glue, and in the assembling process, the first positioning hole 36 corresponds to the positioning post 38 and can be perfectly joined; coaxial connector 25 corresponds to and is in perfect engagement with probe hole 39.

As shown in fig. 4 and 5, the first positioning post 381 corresponds to and can be perfectly engaged with the first positioning hole 372, and the second positioning post 382 corresponds to and can be perfectly engaged with the second positioning hole 371, so as to prevent the connection section of the rectangular dielectric block 21 and the remaining antenna structure 33 from being plated;

the first second mask 351 and the second mask 352 should be bonded to the first probe hole 391 and the second probe hole 392 to prevent the probe hole 39 and the coaxial line cross section from being plated;

the first mask 34 has a rectangular structure with a cross-sectional dimension and TE₁₀The mode rectangular open waveguides 23 have the same opening size and any height; the second mask 35 includes a small cylinder having the same size as the probe hole 39 and a second maskAnd a large cylinder having the same size as the cross section of the coaxial connector 25 and having an arbitrary height, the small cylinder being connected to the large cylinder.

The complementary source of the waveguide structure linear polarization complementary source antenna is realized by a pair of magnetic and electric dipoles; wherein the magnetic dipole is formed by TE₁₀Mode rectangular open waveguide 23, electric dipoles listed in TE₁₀Rectangular dielectric sheets 22 covering the metal thin layers on two sides of the mode rectangular open waveguide 23;

the magnetic and electric dipoles are orthogonally arranged, when the antenna works, electromagnetic waves generated by the magnetic and electric dipoles in the radiation direction of the antenna are mutually superposed, and the radiation in the direction is enhanced; in the direction of the antenna directional diagram back lobe, electromagnetic waves generated by the magnetic and electric dipoles counteract each other, and the backward radiation of the antenna is reduced; the top rectangular dielectric block 21 is used for realizing impedance matching of the antenna; the lower E-plane T-junction waveguide power divider 24 has natural differential characteristics and serves as a differential feed network.

In this embodiment, the utility model discloses can realize the operating bandwidth of broad, as shown in fig. 6, the operating frequency band of this antenna is 7.2GHz to 11.6GHz, about 46.8%, and in-band | S_dd11All less than-10 dB. Within the operating band, the antenna has a stable low back lobe unidirectional radiation pattern, as shown in fig. 7a and 7b, with a pattern front-to-back ratio greater than 22 dB. Fig. 8 shows the antenna gain characteristics, with stable antenna gain in the operating band, an average gain of 5.4dBi, and a fluctuation range of ± 1.2 dBi. These antenna parameter descriptions, the scheme of the utility model discloses still inherit the good electric performance of traditional complementary source antenna when having solved prior art problem.

Claims

1. A waveguide structure linear polarization complementary source antenna based on a 3D printing technology is characterized by comprising a rectangular dielectric block (21), two rectangular dielectric sheets (22), and a TE₁₀The waveguide power divider comprises a mode rectangular open waveguide (23), an E-surface T-shaped junction waveguide power divider (24) and two coaxial connectors (25);

wherein the rectangular dielectric block (21) is located at the top of the antenna and TE₁₀The mode rectangular open waveguides (23) are connected; TE₁₀The mode rectangular opening waveguide (23) is connected belowA waveguide power divider (24) with an E-surface T-shaped junction is connected; two rectangular dielectric sheets (22) have the same structural parameters and are bonded with TE₁₀The wide side of the cross section of the mode rectangular open waveguide (23) is symmetrically arranged at the opening connected with the rectangular dielectric block (21) and connected with the TE₁₀The mode rectangular open waveguides (23) are connected; the lower part of the E-surface T-shaped junction waveguide power divider (24) is connected with two coaxial connectors (25).

2. The waveguide structure linearly polarized complementary source antenna based on the 3D printing technology is characterized in that all the surfaces of the waveguide structure linearly polarized complementary source antenna except the top surface and the four side surfaces of the rectangular dielectric block (21) and the annular cross section between the inner conductor and the outer conductor of the E-surface T-junction waveguide power divider (24) connected with the two coaxial connectors (25) are covered with a thin metal layer in an electroplating mode, and the thin metal layer is covered with copper in an electroplating mode.

3. The waveguide structure linear polarization complementary source antenna based on the 3D printing technology is characterized in that the waveguide structure linear polarization complementary source antenna is divided into two parts for 3D printing when being processed, wherein the two parts are a top rectangular dielectric block (21) and a rest antenna structure (33); after 3D printing is finished, arranging a first mask (34) at the joint of the rectangular medium block (21) and the rest antenna structure (33);

two first positioning holes (36) are arranged at the bottom of the rectangular dielectric block (21), namely a first positioning hole (361) arranged at the bottom of the front half part of the rectangular dielectric block (21) and a second positioning hole (362) arranged at the bottom of the rear half part of the rectangular dielectric block (21);

a second positioning hole (37) corresponding to the first positioning hole (36) in position is arranged in the first mask (34), the first second positioning hole (372) corresponds to the first positioning hole (361), and the second positioning hole (371) corresponds to the second first positioning hole (362);

in the remaining antenna structure (33), TE₁₀Two positioning columns (38) are arranged at the top opening of the mode rectangular opening waveguide (23), wherein a first positioning column (381), a first positioning hole (361) and a first positioning holeThe two positioning holes (372) correspond to each other and can be perfectly jointed, and the second positioning column (382) corresponds to the second first positioning hole (362) and the second positioning hole (371) and can be perfectly jointed;

in the rest antenna structure (33), two probe holes (39) are arranged on the geometric center line of the bottom of the E-surface T-shaped junction waveguide power divider (24) along the wide edge, and a first probe hole (391) and a second probe hole (392) are symmetrically arranged at the wavelength of a quarter of the waveguide wave away from the tail end of the waveguide respectively;

and arranging second masks (35) at two probe holes (39) of the E-surface T-junction waveguide power divider (24), wherein the second masks comprise a first second mask (351) arranged at the first probe hole (391) and a second mask (352) arranged at the second probe hole (392).

4. The waveguide structure linearly polarized complementary source antenna based on the 3D printing technology is characterized in that after a mask is finished, the rest antenna structure (33) needs to be electroplated, the rectangular dielectric block (21) does not need to be electroplated, finally, the antenna is assembled, the rectangular dielectric block (21), the rest antenna structure (33) and two coaxial connectors (25) are bonded by ethyl cyanoacrylate glue, and in the assembling process, the first positioning hole (36) corresponds to the positioning column (38) and can be perfectly jointed; the coaxial connector (25) corresponds to and perfectly engages the probe hole (39).

5. The waveguide structure linearly polarized complementary source antenna based on the 3D printing technology is characterized in that the first positioning column (381) corresponds to and can be perfectly jointed with the first second positioning hole (372), and the second positioning column (382) corresponds to and can be perfectly jointed with the second positioning hole (371), so as to avoid electroplating of the connecting section of the rectangular dielectric block (21) and the rest of the antenna structure (33);

the first second mask (351) and the second mask (352) should be jointed with the first probe hole (391) and the second probe hole (392) to avoid electroplating of the probe hole (39) and the cross section of the coaxial line;

the first mask (34) is rectangular in configuration, having a cross-sectional dimension and a TE₁₀Opening of a mode rectangular open waveguide (23)The mouth sizes are the same, and the heights are arbitrary; the second mask (35) comprises a small cylinder with the same size as the probe hole (39) and a large cylinder with the same size as the cross section of the coaxial connector (25) and any height, and the small cylinder is connected with the large cylinder.

6. The waveguide structure linear polarization complementary source antenna based on the 3D printing technology according to any one of claims 1 to 5, wherein the complementary source of the waveguide structure linear polarization complementary source antenna is realized by a pair of magnetic and electric dipoles; wherein the magnetic dipole is formed by TE₁₀A mode rectangular open waveguide (23) with electric dipoles listed in TE₁₀Rectangular dielectric sheets (22) covered with metal thin layers are arranged on two sides of the mode rectangular open waveguide (23);

the magnetic and electric dipoles are orthogonally arranged, when the antenna works, electromagnetic waves generated by the magnetic and electric dipoles in the radiation direction of the antenna are mutually superposed, and the radiation in the direction is enhanced; in the direction of the antenna directional diagram back lobe, electromagnetic waves generated by the magnetic and electric dipoles counteract each other, and the backward radiation of the antenna is reduced; the top rectangular dielectric block (21) is used for realizing impedance matching of the antenna; the E-surface T-junction waveguide power divider (24) at the lower end has natural differential characteristics and is used as a differential feed network.