Defect-based structure-based ltcc complementary antenna and wireless communication device

Abstract

The application discloses a kind of based on defect ground structure's LTCC complementary antenna and wireless communication equipment, the antenna includes at least four layers of dielectric substrate and three layers of conductor layer, each layer of dielectric substrate is LTCC dielectric substrate, three layers of conductor layer are located in the space surrounded by adjacent four layers of dielectric substrate, each layer of conductor layer is printed between adjacent two layers of dielectric substrate using LTCC printing process, three layers of conductor layer are formed into complementary antenna by based on defect ground structure's half-wave length sheet antenna, quarter-wave length section antenna and excitation feed line, the half-wave length sheet antenna is used as electric dipole antenna, and the quarter-wave length section antenna is used as magnetic dipole antenna.The application combines defect ground structure, simple structure, short process, the bandwidth of complementary antenna combined with defect ground structure is expanded to more than 90%, the performance of traditional complementary antenna is obviously improved, with the advantages of high precision, high reliability, small size.

Description

Technical Field

[0001] This invention relates to a complementary antenna, and more particularly to an LTCC complementary antenna based on a defective ground structure and a wireless communication device, belonging to the field of wireless communication technology. Background Technology

[0002] With the continuous upgrading of modern communication systems and the rapid development of wireless communication technology, more stringent requirements have been placed on radio frequency (RF) front-end circuit components. High performance, miniaturization, and low cost have become important indicators for evaluating components today. In modern wireless transceiver systems, the antenna is a crucial component that converts circuit signals and electromagnetic wave signals into each other. Wider operating frequencies, higher gain, and lower tail lobes allow antennas to adapt to a wider range of needs.

[0003] Existing simple antennas utilize less than 20% bandwidth. Aim for wider bandwidth in antenna design. Complementary antennas offer the advantages of simple structure and wider bandwidth. In traditional complementary antenna designs, bandwidth is less than 40%. Furthermore, antenna applications often incorporate filters into the antenna circuitry to optimize its performance. With increasingly demanding antenna performance requirements, there is an urgent need for antennas with wider bandwidth and filtering capabilities.

[0004] A complementary antenna is a device that uses both an electric dipole antenna and a magnetic dipole antenna to excite the same signal. This not only increases the bandwidth of the antenna, but also allows the signals from the electric and magnetic dipole antennas to superimpose in the propagation direction and cancel each other out in the opposite direction. This results in a wider bandwidth, increased antenna gain, and reduced tail lobes. Previous improvements to complementary antennas have used methods such as folding, adding other structures and components, sacrificing the advantages of simple structure and short manufacturing process of traditional complementary antennas in exchange for better electrical performance. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings and deficiencies of existing radio frequency devices and to provide an LTCC complementary antenna based on a defective ground structure. This antenna combines a defective ground structure, has a simple structure, a short manufacturing process, and its bandwidth is extended to more than 90%, which significantly improves the performance of traditional complementary antennas. It has the advantages of high precision, high reliability, and small size.

[0006] Another object of the present invention is to provide a wireless communication device.

[0007] The objective of this invention can be achieved by adopting the following technical solutions:

[0008] An LTCC complementary antenna based on a defective ground structure includes at least four dielectric substrates and three conductor layers. Each dielectric substrate is an LTCC dielectric substrate, and the three conductor layers are located within the space enclosed by the four adjacent dielectric substrates. Each conductor layer is printed between two adjacent dielectric substrates using an LTCC printing process. The three conductor layers form a complementary antenna through a half-wavelength patch antenna, a quarter-wavelength cross-section antenna, and an excitation feed line based on the defective ground structure. The half-wavelength patch antenna serves as an electric dipole antenna, and the quarter-wavelength cross-section antenna serves as a magnetic dipole antenna.

[0009] Furthermore, the three conductor layers are, from top to bottom, the first conductor layer, the second conductor layer, and the third conductor layer. The half-wavelength patch antenna includes two quarter-wavelength patch antennas and a ground plane with a defective structure. The quarter-wavelength cross-section antenna includes sixteen through-hole posts and a ground plane with a defective structure. The excitation feed line includes two through-hole posts, a short stripline line, and a ground plane with a defective structure.

[0010] Two quarter-wavelength patch antennas are designated as the first quarter-wavelength patch antenna and the second quarter-wavelength patch antenna, respectively. The two quarter-wavelength patch antennas and the stripline are disposed on the first conductor layer. The sixteen through-hole posts in the quarter-wavelength section antenna are designated as the first through-hole post, the second through-hole post, the third through-hole post, the fourth through-hole post, the fifth through-hole post, the sixth through-hole post, the seventh through-hole post, the eighth through-hole post, the ninth through-hole post, the tenth through-hole post, the eleventh through-hole post, the twelfth through-hole post, the thirteenth through-hole post, the fourteenth through-hole post, the fifteenth through-hole post, and the sixteenth through-hole post, respectively. These sixteen through-hole posts connect the first conductor layer, the second conductor layer, and the third conductor layer. The two through-hole posts in the excitation feed line are designated as the seventeenth through-hole post and the eighteenth through-hole post. The seventeenth through-hole post is connected to the stripline and connects the first conductor layer, the second conductor layer, and the third conductor layer, serving as the feed input. The eighteenth through-hole post is connected to the stripline and connects the first conductor layer and the second conductor layer. The ground plane is disposed on the third conductor layer.

[0011] Furthermore, the first conductor layer includes a first quarter-wavelength sheet antenna, a second quarter-wavelength sheet antenna, a stripline, and the upper parts of the first through-hole post, the second through-hole post, the third through-hole post, the fourth through-hole post, the fifth through-hole post, the sixth through-hole post, the seventh through-hole post, the eighth through-hole post, the ninth through-hole post, the tenth through-hole post, the eleventh through-hole post, the twelfth through-hole post, the thirteenth through-hole post, the fourteenth through-hole post, the fifteenth through-hole post, the sixteenth through-hole post, the seventeenth through-hole post, and the eighteenth through-hole post;

[0012] The right edge of the first quarter-wavelength patch antenna is connected to the first through-hole post, the second through-hole post, the third through-hole post, the fourth through-hole post, the fifth through-hole post, the sixth through-hole post, the seventh through-hole post, and the eighth through-hole post. The left edge of the second quarter-wavelength patch antenna is connected to the ninth through-hole post, the tenth through-hole post, the eleventh through-hole post, the twelfth through-hole post, the thirteenth through-hole post, the fourteenth through-hole post, the fifteenth through-hole post, and the sixteenth through-hole post. The left side of the stripline is connected to the seventeenth through-hole post, and the right side of the stripline is connected to the eighteenth through-hole post.

[0013] Furthermore, the second conductor layer includes the middle portions of the first through-hole pillar, the second through-hole pillar, the third through-hole pillar, the fourth through-hole pillar, the fifth through-hole pillar, the sixth through-hole pillar, the seventh through-hole pillar, the eighth through-hole pillar, the ninth through-hole pillar, the tenth through-hole pillar, the eleventh through-hole pillar, the twelfth through-hole pillar, the thirteenth through-hole pillar, the fourteenth through-hole pillar, the fifteenth through-hole pillar, the sixteenth through-hole pillar, and the seventeenth through-hole pillar, as well as the lower portion of the eighteenth through-hole pillar, wherein the eighteenth through-hole pillar stops communicating downwards in the second conductor layer.

[0014] Furthermore, the third conductor layer includes the lower portions of the first through-hole pillar, the second through-hole pillar, the third through-hole pillar, the fourth through-hole pillar, the fifth through-hole pillar, the sixth through-hole pillar, the seventh through-hole pillar, the eighth through-hole pillar, the ninth through-hole pillar, the tenth through-hole pillar, the eleventh through-hole pillar, the twelfth through-hole pillar, the thirteenth through-hole pillar, the fourteenth through-hole pillar, the fifteenth through-hole pillar, the sixteenth through-hole pillar, and the seventeenth through-hole pillar, as well as a floor with a defective structure;

[0015] The first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, eleventh, twelfth, thirteenth, fourteenth, fifteenth, and sixteenth through-hole pillars stop communicating downwards at the third conductor layer, and the seventeenth through-hole pillar passes downwards through the defect structure of the floor as a feed input.

[0016] Furthermore, the seventeenth through-hole post receives the feed source via an SMA connector.

[0017] Furthermore, both the first quarter-wavelength patch antenna and the second quarter-wavelength patch antenna have a square structure.

[0018] Furthermore, the strip has a rectangular structure.

[0019] Furthermore, the defect structure includes a rectangular portion and two circular portions, with the two circular portions connected to the two ends of the rectangular portion, respectively.

[0020] Furthermore, the upper and lower edges of the rectangular portion respectively bypass the seventeenth through-hole post.

[0021] Another objective of this invention can be achieved by adopting the following technical solution:

[0022] A wireless communication device includes the aforementioned LTCC complementary antenna.

[0023] The present invention has the following advantages over the prior art:

[0024] This invention utilizes a defective ground structure, complementary antenna design, and LTCC technology to solve the problem of antennas requiring wide bandwidth, high gain, low taillobe, and certain filtering effect in circuits. The complementary antenna is combined with the defective ground structure, which is applied not only to conventional ground but also to unconventional ground of the excitation feed line (this ground is also a quarter-wavelength cross-section antenna). After application, the defective ground structure does not hinder the operation of the quarter-wavelength cross-section antenna, and at the same time, it also has the ability to adjust the distributed inductance and distributed capacitance, thereby increasing the bandwidth. Attached Figure Description

[0025] 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 will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a three-dimensional structural diagram of an LTCC complementary antenna based on a defective ground structure according to an embodiment of the present invention.

[0027] Figure 2 This is a schematic diagram of the structure of the first conductor layer in the LTCC complementary antenna based on the defective ground structure according to an embodiment of the present invention.

[0028] Figure 3 This is a schematic diagram of the second conductor layer in an LTCC complementary antenna based on a defective ground structure according to an embodiment of the present invention.

[0029] Figure 4 This is a schematic diagram of the third conductor layer in an LTCC complementary antenna based on a defective ground structure according to an embodiment of the present invention.

[0030] Figure 5 The diagram shows the S-parameters and gain curves of the LTCC complementary antenna based on the defective ground structure according to an embodiment of the present invention.

[0031] Figure 6 The radiation pattern of the LTCC complementary antenna with a defective ground structure based on an embodiment of the present invention has a center frequency of 20 GHz.

[0032] Figure 7This is the radiation pattern of an LTCC complementary antenna with a defective ground structure and a center frequency of 30 GHz, according to an embodiment of the present invention.

[0033] Figure 8 The radiation pattern of the LTCC complementary antenna with a defective ground structure based on an embodiment of the present invention has a center frequency of 40 GHz.

[0034] Wherein, 1-first conductor layer, 11-strip line, 12-first quarter-wavelength patch antenna, 13-second quarter-wavelength patch antenna, 2-second conductor layer, 3-third conductor layer, 41-first through-hole post, 42-second through-hole post, 43-third through-hole post, 44-fourth through-hole post, 51-fifth through-hole post, 52-sixth through-hole post, 53-seventh through-hole post, 54-eighth through-hole post, 61-ninth through-hole post, 62-tenth through-hole post, 63-eleventh through-hole post, 64-twelfth through-hole post, 71-thirteenth through-hole post, 72-fourteenth through-hole post, 73-fifteenth through-hole post, 74-sixteenth through-hole post, 81-seventeenth through-hole post, 82-eighteenth through-hole post, 90-defect structure, 91-floor. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.

[0036] Example:

[0037] like Figure 1 As shown, this embodiment provides an LTCC complementary antenna based on a defective ground structure. The antenna includes four dielectric substrates and three conductor layers. The three conductor layers are located within the space enclosed by the four dielectric substrates. Each conductor layer is printed between two adjacent dielectric substrates using LTCC printing technology. The three conductor layers are, from top to bottom, a first conductor layer 1, a second conductor layer 2, and a third conductor layer 3. The three conductor layers form a complementary antenna through a half-wavelength patch antenna, a quarter-wavelength cross-section antenna, and an excitation feed line based on the defective ground structure.

[0038] Furthermore, the half-wavelength patch antenna serves as an electric dipole antenna, comprising two quarter-wavelength patch antennas and a ground plane 91 with a defective structure 90. The quarter-wavelength cross-section antenna includes a magnetic dipole antenna, comprising sixteen through-hole pillars and a ground plane 91 with a defective structure 90. The excitation feed line includes two through-hole pillars, a short stripline 11, and a ground plane 91 with a defective structure 90. The electric dipole antenna, the magnetic dipole antenna, and the excitation feed line constitute a complementary antenna.

[0039] In this embodiment, defective grounding technology is used in two places. One is a ground plane with a defective shape, which affects the excitation feed line and the electric dipole antenna, and is a relatively common application. The other is a defective grounding structure used on the magnetic dipole. The magnetic dipole antenna is an important part of the ground plane structure of the excitation feed line, which greatly affects the impedance matching of the excitation feed line. Since the excitation feed line is an important component of the antenna impedance matching, using a defective grounding structure on the magnetic dipole antenna can greatly expand the impedance matching of the entire antenna.

[0040] Furthermore, the two quarter-wavelength patch antennas are respectively the first quarter-wavelength patch antenna 12 and the second quarter-wavelength patch antenna 13, and the two quarter-wavelength patch antennas and the stripline 11 are disposed in the first conductor layer 1; the sixteen through-hole posts in the quarter-wavelength cross-section antenna are respectively the first through-hole post 41, the second through-hole post 42, the third through-hole post 43, the fourth through-hole post 44, the fifth through-hole post 51, the sixth through-hole post 52, the seventh through-hole post 53, the eighth through-hole post 54, the ninth through-hole post 61, the tenth through-hole post 62, the eleventh through-hole post 63, and the twelfth through-hole post 64. 4. The thirteenth through-hole post 71, the fourteenth through-hole post 72, the fifteenth through-hole post 73, and the sixteenth through-hole post 74 connect the first conductor layer 1, the second conductor layer 2, and the third conductor layer 3. The two through-hole posts in the excitation feed line are the seventeenth through-hole post 81 and the eighteenth through-hole post 82. The seventeenth through-hole post 71 is connected to the stripline 11 and connects the first conductor layer 1, the second conductor layer 2, and the third conductor layer 3, serving as the feed input. The eighteenth through-hole post 72 is connected to the stripline 11 and connects the first conductor layer 1 and the second conductor layer 2. The ground plane 91 is set on the third conductor layer 3.

[0041] Further, the first conductor layer 1 includes a first quarter-wavelength patch antenna 12, a second quarter-wavelength patch antenna 13, a stripline 11, and the upper parts of the first through-hole post 41, the second through-hole post 42, the third through-hole post 43, the fourth through-hole post 44, the fifth through-hole post 51, the sixth through-hole post 52, the seventh through-hole post 53, the eighth through-hole post 54, the ninth through-hole post 61, the tenth through-hole post 62, the eleventh through-hole post 63, the twelfth through-hole post 64, the thirteenth through-hole post 71, the fourteenth through-hole post 72, the fifteenth through-hole post 73, the sixteenth through-hole post 74, the seventeenth through-hole post 81, and the eighteenth through-hole post 82, and the first quarter-wavelength patch antenna 12 and the second quarter-wavelength patch antenna 13. All three are square structures, while stripline 11 is rectangular. The right edge of the first quarter-wavelength patch antenna 12 is connected to the first through-hole post 41, the second through-hole post 42, the third through-hole post 43, the fourth through-hole post 44, the fifth through-hole post 51, the sixth through-hole post 52, the seventh through-hole post 53, and the eighth through-hole post 54. The left edge of the second quarter-wavelength patch antenna 13 is connected to the ninth through-hole post 61, the tenth through-hole post 62, the eleventh through-hole post 63, the twelfth through-hole post 64, the thirteenth through-hole post 71, the fourteenth through-hole post 72, the fifteenth through-hole post 73, and the sixteenth through-hole post 74. The left side of stripline 11 is connected to the seventeenth through-hole post 81, and the right side of stripline 11 is connected to the eighteenth through-hole post 82.

[0042] Furthermore, the second conductor layer 2 includes the middle portion of the first through-hole pillar 41, the second through-hole pillar 42, the third through-hole pillar 43, the fourth through-hole pillar 44, the fifth through-hole pillar 51, the sixth through-hole pillar 52, the seventh through-hole pillar 53, the eighth through-hole pillar 54, the ninth through-hole pillar 61, the tenth through-hole pillar 62, the eleventh through-hole pillar 63, the twelfth through-hole pillar 64, the thirteenth through-hole pillar 71, the fourteenth through-hole pillar 72, the fifteenth through-hole pillar 73, the sixteenth through-hole pillar 74, the seventeenth through-hole pillar 81, and the lower portion of the eighteenth through-hole pillar 82, wherein the eighteenth through-hole pillar 82 stops communicating downward in the second conductor layer 2.

[0043] Further, the third conductor layer 3 includes the lower portions of the first through-hole pillar 41, the second through-hole pillar 42, the third through-hole pillar 43, the fourth through-hole pillar 44, the fifth through-hole pillar 51, the sixth through-hole pillar 52, the seventh through-hole pillar 53, the eighth through-hole pillar 54, the ninth through-hole pillar 61, the tenth through-hole pillar 62, the eleventh through-hole pillar 63, the twelfth through-hole pillar 64, the thirteenth through-hole pillar 71, the fourteenth through-hole pillar 72, the fifteenth through-hole pillar 73, the sixteenth through-hole pillar 74, and the seventeenth through-hole pillar 81, as well as the floor 81 with the defect structure 80; the first through-hole pillar 41, the second through-hole pillar 42, the third through-hole pillar 43, the fourth through-hole pillar 44, the fifth through-hole pillar 51, the sixth through-hole pillar 52, the seventh through-hole pillar 53, the eighth through-hole pillar 54, the ninth through-hole pillar 61, the tenth through-hole pillar 62, the eleventh through-hole pillar 63, the twelfth through-hole pillar 64, the thirteenth through-hole pillar 71, the fourteenth through-hole pillar 72, the fifteenth through-hole pillar 73, the sixteenth through-hole pillar 74, and the seventeenth through-hole pillar 81. Columns 53, 8th through-hole column 54, 9th through-hole column 61, 10th through-hole column 62, 11th through-hole column 63, 12th through-hole column 64, 13th through-hole column 71, 14th through-hole column 72, 15th through-hole column 73, and 16th through-hole column 74 stop downward communication at the third conductor layer 3. Column 81 passes downward through the defect structure 80 of the floor 81 as a feed input. Specifically, the feed can be input through an SMA connector or similar means. The defect structure includes a rectangular part and two circular parts. The two circular parts are connected to the two ends of the rectangular part, respectively. In order to ensure that the feed input of the 17th through-hole column 81 is not affected, the upper and lower edges of the rectangular part bypass the 17th through-hole column 81.

[0044] like Figures 5-8 As shown, the complementary antenna in this embodiment is suitable for antenna requirements in the 19.4GHz to 42.6GHz frequency band, with a VSWR of less than 2, a gain of 8.2±0.3dBi, a center frequency taillobe intensity of less than -40dBi, and S-parameters reaching -4dB at 17.5GHz, exhibiting good filtering effect.

[0045] In summary, this invention applies a defective ground structure to a magnetic dipole antenna. Since the antenna signal is transmitted in the form of electromagnetic waves through the space between the excitation feed line and the conventional ground plane, and between the excitation feed line and the magnetic dipole antenna, and in traditional structures, the magnetic dipole antenna is a complete ground, this invention, by applying a defective ground structure to the magnetic dipole antenna, changes the distributed inductance and capacitance of the excitation antenna, increasing the bandwidth and achieving a filter effect while retaining the conventional functions of the magnetic dipole antenna. Using a complementary antenna combined with a defective ground structure, compared to traditional antennas, it has a wider bandwidth, higher gain, and smaller tail lobe. Traditional patch antennas are highly sensitive to frequency, have weak directivity, a bandwidth below 10%, a gain below 5, and a tail lobe above -20 dBi. In a complementary antenna without a defective ground, the bandwidth is below 50%, the gain is greater than 6.5 dBi, and the tail lobe intensity is below -30 dBi. With the defective ground structure, the usable frequency exceeds 100%, the gain is greater than 7.8 dBi, and the tail lobe intensity is below -40 dBi.

[0046] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope disclosed in the present invention, based on the technical solution and inventive concept of the present invention, shall fall within the scope of protection of the present invention.

Claims

1. An LTCC complementary antenna based on a defective ground structure, characterized in that, It includes at least four dielectric substrates and three conductor layers. Each dielectric substrate is an LTCC dielectric substrate. The three conductor layers are located within the space enclosed by the four adjacent dielectric substrates. Each conductor layer is printed between two adjacent dielectric substrates using LTCC printing technology. The three conductor layers form a complementary antenna through a half-wavelength patch antenna based on a defective ground structure, a quarter-wavelength cross-section antenna, and an excitation feed line. The half-wavelength patch antenna serves as an electric dipole antenna, and the quarter-wavelength cross-section antenna serves as a magnetic dipole antenna. The three conductor layers are, from top to bottom, the first conductor layer, the second conductor layer, and the third conductor layer. The half-wavelength patch antenna includes two quarter-wavelength patch antennas and a ground plane with a defective structure. The quarter-wavelength cross-section antenna includes sixteen through-hole posts and a ground plane with a defective structure. The excitation feed line includes two through-hole posts, a short stripline line, and a ground plane with a defective structure. Two quarter-wavelength patch antennas are designated as the first quarter-wavelength patch antenna and the second quarter-wavelength patch antenna, respectively. The two quarter-wavelength patch antennas and the stripline are disposed on the first conductor layer. The sixteen through-hole posts in the quarter-wavelength section antenna are designated as the first through-hole post, the second through-hole post, the third through-hole post, the fourth through-hole post, the fifth through-hole post, the sixth through-hole post, the seventh through-hole post, the eighth through-hole post, the ninth through-hole post, the tenth through-hole post, the eleventh through-hole post, the twelfth through-hole post, the thirteenth through-hole post, the fourteenth through-hole post, the fifteenth through-hole post, and the sixteenth through-hole post, respectively. These sixteen through-hole posts connect the first conductor layer, the second conductor layer, and the third conductor layer. The two through-hole posts in the excitation feed line are designated as the seventeenth through-hole post and the eighteenth through-hole post. The seventeenth through-hole post is connected to the stripline and connects the first conductor layer, the second conductor layer, and the third conductor layer, serving as the feed input. The eighteenth through-hole post is connected to the stripline and connects the first conductor layer and the second conductor layer. The ground plane is disposed on the third conductor layer.

2. The LTCC complementary antenna according to claim 1, characterized in that, The first conductor layer includes a first quarter-wavelength sheet antenna, a second quarter-wavelength sheet antenna, a stripline, and the upper parts of the first through-hole post, the second through-hole post, the third through-hole post, the fourth through-hole post, the fifth through-hole post, the sixth through-hole post, the seventh through-hole post, the eighth through-hole post, the ninth through-hole post, the tenth through-hole post, the eleventh through-hole post, the twelfth through-hole post, the thirteenth through-hole post, the fourteenth through-hole post, the fifteenth through-hole post, the sixteenth through-hole post, the seventeenth through-hole post, and the eighteenth through-hole post; The right edge of the first quarter-wavelength patch antenna is connected to the first through-hole post, the second through-hole post, the third through-hole post, the fourth through-hole post, the fifth through-hole post, the sixth through-hole post, the seventh through-hole post, and the eighth through-hole post. The left edge of the second quarter-wavelength patch antenna is connected to the ninth through-hole post, the tenth through-hole post, the eleventh through-hole post, the twelfth through-hole post, the thirteenth through-hole post, the fourteenth through-hole post, the fifteenth through-hole post, and the sixteenth through-hole post. The left side of the stripline is connected to the seventeenth through-hole post, and the right side of the stripline is connected to the eighteenth through-hole post.

3. The LTCC complementary antenna according to claim 1, characterized in that, The second conductor layer includes the middle portions of the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, eleventh, twelfth, thirteenth, fourteenth, fifteenth, sixteenth, and seventeenth through-hole pillars, as well as the lower portion of the eighteenth through-hole pillar, wherein the eighteenth through-hole pillar stops communicating downwards in the second conductor layer.

4. The LTCC complementary antenna according to claim 1, characterized in that, The third conductor layer includes the lower part of the first through-hole pillar, the second through-hole pillar, the third through-hole pillar, the fourth through-hole pillar, the fifth through-hole pillar, the sixth through-hole pillar, the seventh through-hole pillar, the eighth through-hole pillar, the ninth through-hole pillar, the tenth through-hole pillar, the eleventh through-hole pillar, the twelfth through-hole pillar, the thirteenth through-hole pillar, the fourteenth through-hole pillar, the fifteenth through-hole pillar, the sixteenth through-hole pillar, and the seventeenth through-hole pillar, as well as the floor with a defective structure; The first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, eleventh, twelfth, thirteenth, fourteenth, fifteenth, and sixteenth through-hole pillars stop communicating downwards at the third conductor layer, and the seventeenth through-hole pillar passes downwards through the defect structure of the floor as a feed input.

5. The LTCC complementary antenna according to any one of claims 1-4, characterized in that, The seventeenth through-hole post receives the feed source via an SMA connector.

6. The LTCC complementary antenna according to any one of claims 1-4, characterized in that, Both the first quarter-wavelength patch antenna and the second quarter-wavelength patch antenna have a square structure.

7. The LTCC complementary antenna according to any one of claims 1-4, characterized in that, The strip has a rectangular structure.

8. The LTCC complementary antenna according to any one of claims 1-4, characterized in that, The defect structure includes a rectangular portion and two circular portions, with the two circular portions connected to the two ends of the rectangular portion respectively.

9. The LTCC complementary antenna according to claim 8, characterized in that, The upper and lower edges of the rectangular section respectively bypass the seventeenth through-hole post.

10. A wireless communication device, characterized in that, Includes the LTCC complementary antenna as described in any one of claims 1-9.

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