Printed dipole antenna

Abstract

The utility model relates to a printed dipole antenna, which comprises a metal bottom plate, a first dielectric plate, a second dielectric plate, an antenna housing and an antenna connector, the antenna housing is arranged on the front surface of the metal bottom plate, the first dielectric plate and the second dielectric plate are positioned in the antenna housing, and the first dielectric plate and the second dielectric plate are parallel and are vertically arranged on the front surface of the metal bottom plate; the distance between the first dielectric plate and the second dielectric plate is 24.5 mm, the first dielectric plate and the second dielectric plate are both PCBs, a C-band antenna is arranged on the first dielectric plate, an X-band antenna is arranged on the second dielectric plate, two antenna connectors are arranged on the bottom face of the metal bottom plate, and the two antenna connectors are connected with the C-band antenna and the X-band antenna respectively. The beneficial effects of the utility model lie in that high gain, wide wave beam coverage and high power capacity performance in the C wave band and the X wave band are realized, and miniaturization, light weight and environmental adaptability are considered at the same time.

Description

Technical Field

[0001] This utility model belongs to the field of communication antenna technology, specifically relating to a printed dipole antenna. Background Technology

[0002] In recent years, with the rapid development of 5G communication, the Internet of Things (IoT), and satellite internet, the performance requirements for communication antennas in fields such as satellite communication, radar systems, and wireless communication have become increasingly stringent. Antenna design needs to meet requirements such as high gain, wide beam coverage, low VSWR, and high power capacity, while also taking into account structural requirements such as size, weight, and environmental adaptability.

[0003] The C-band (4.5GHz–5.8GHz) and X-band (8.5GHz–11GHz) are commonly used frequency bands in communication systems, widely applied in military, aerospace, and meteorological monitoring fields. Traditional printed dipole antennas are widely used in communication systems due to their low cost and ease of integration. However, their gain is relatively low over a wide beam coverage area, especially in high-frequency bands (such as the X-band), where the gain often fails to meet the high requirements of modern communication systems. Furthermore, under high-frequency and high-power conditions, the antenna's power capacity is limited, making it difficult to withstand prolonged high-power operation. In addition, traditional antenna designs often struggle to balance high performance with miniaturization and lightweight design, and their performance is unstable in extreme environments (such as high temperature, low temperature, and high humidity), making them unsuitable for use in complex environments. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a printed dipole antenna that achieves high gain, wide beam coverage, and high power capacity in the C-band and X-band, while also taking into account miniaturization, lightweight design, and environmental adaptability.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A printed dipole antenna includes a metal base plate, a first dielectric substrate, a second dielectric substrate, an radome, and antenna connectors. The radome is disposed on the front side of the metal base plate. The first and second dielectric substrates are located inside the radome and are arranged parallel to each other and vertically on the front side of the metal base plate. The distance between the first and second dielectric substrates is 24.5 mm. Both the first and second dielectric substrates are PCBs. A C-band antenna is disposed on the first dielectric substrate, and an X-band antenna is disposed on the second dielectric substrate. Two antenna connectors are disposed on the bottom surface of the metal base plate, and the two antenna connectors are respectively connected to the C-band antenna and the X-band antenna.

[0007] Furthermore, both the first and second dielectric substrates are made of F4B material, and both have a relative permittivity of 4.3.

[0008] Furthermore, the front of the metal base plate is provided with two bases corresponding to the first dielectric plate and the second dielectric plate, respectively. The bases are provided with slots, and the first dielectric plate and the second dielectric plate are respectively inserted into the corresponding slots and fixed to the bases with screws.

[0009] Furthermore, the dimensions of the first dielectric substrate are 33mm long * 26mm wide * 1mm thick, and the dimensions of the second dielectric substrate are 33mm long * 18mm wide * 1mm thick.

[0010] Furthermore, both the C-band antenna and the X-band antenna include a microstrip balun line, a microstrip transmission line, and two antenna arms. The microstrip transmission line is connected to the microstrip balun line, the antenna arms are connected to the microstrip transmission line, and the antenna connector (5) is connected to the microstrip balun line.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. This utility model combines a C-band antenna and an X-band antenna and optimizes the spacing between the two antennas to achieve high-performance dual-band communication. This gives the printed dipole antenna features such as wide bandwidth and wide beam, while reducing the overall size of the antenna.

[0013] 2. By optimizing the antenna structure and material selection, this utility model achieves miniaturization (size no greater than 50mm×35mm×30mm) and lightweighting (weight of a single antenna no greater than 200g) of printed dipole antennas, meeting the stringent requirements for antenna size and weight in aerospace and other fields.

[0014] 3. Through optimized structural design, this utility model ensures the stable operation of the printed dipole antenna in harsh environments such as extreme temperature (-40℃~+80℃), high humidity (≤95% RH) and high altitude (≤5000m). Attached Figure Description

[0015] Figure 1 This is an exploded view of the overall structure of the printed dipole antenna in this utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure assembly of the printed dipole antenna in this utility model;

[0017] Figure 3 This is a schematic diagram of the back structure of the second dielectric plate in this utility model;

[0018] Figure 4 The standing wave simulation results of the C-band antenna in this utility model;

[0019] Figure 5The simulation results show the radiation pattern of the C-band antenna in this invention at a frequency of 4.5 GHz.

[0020] Figure 6 The simulation results show the radiation pattern of the C-band antenna in this invention at a frequency of 5.1 GHz.

[0021] Figure 7 The simulation results show the radiation pattern of the C-band antenna in this invention at a frequency of 5.8 GHz.

[0022] Figure 8 The standing wave simulation results of the X-band antenna in this utility model;

[0023] Figure 9 The simulation results show the radiation pattern of the X-band antenna in this invention at a frequency of 8.5 GHz.

[0024] Figure 10 The simulation results show the radiation pattern of the X-band antenna in this invention at a frequency of 9.7 GHz.

[0025] Figure 11 The simulation results show the radiation pattern of the X-band antenna in this invention at a frequency of 11 GHz.

[0026] In the diagram: 1. Metal base plate; 2. First dielectric substrate; 3. Second dielectric substrate; 4. Antenna radome; 5. Antenna connector; 6. Base; 7. Screws. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0028] like Figures 1-3 As shown, a printed dipole antenna includes a metal base plate 1, a first dielectric substrate 2, a second dielectric substrate 3, an antenna radome 4, and antenna connectors 5. The antenna radome 4 is disposed on the front side of the metal base plate 1. The first dielectric substrate 2 and the second dielectric substrate 3 are located inside the antenna radome 4. The first dielectric substrate 2 and the second dielectric substrate 3 are disposed parallel to each other and vertically on the front side of the metal base plate 1. Both the first dielectric substrate 2 and the second dielectric substrate 3 are PCBs. A C-band antenna is disposed on the first dielectric substrate 2, and an X-band antenna is disposed on the second dielectric substrate 3. Two antenna connectors 5 are disposed on the bottom surface of the metal base plate 1, and the two antenna connectors 5 are respectively connected to the C-band antenna and the X-band antenna.

[0029] When combining C-band and X-band antennas, the close spacing between them leads to excessive coupling and severe pattern distortion, while a large spacing does not meet the requirements for antenna miniaturization. Therefore, this invention, through simulation verification, places the two antennas in parallel with a spacing of 24.5mm, ultimately enabling the printed dipole antenna to achieve high-performance dual-band communication with broadband and wide beam characteristics, while reducing the overall size of the antenna.

[0030] like Figure 1 , Figure 2 As shown, the front of the metal base plate 1 is provided with two bases 6 corresponding to the first medium plate 2 and the second medium plate 3 respectively. The bases 6 are provided with slots. The first medium plate 2 and the second medium plate 3 are respectively inserted into the corresponding slots and fixed to the bases 6 by screws 7.

[0031] Both C-band and X-band antennas include a microstrip balun, a microstrip transmission line, and two antenna arms. The microstrip transmission line is connected to the microstrip balun, the antenna arms are connected to the microstrip transmission line, and the antenna connector (5) is connected to the microstrip balun. The excitation signal is fed in from the antenna feed point and transmitted to the two antenna arms through the microstrip balun and the microstrip transmission line. On the microstrip transmission line, the current direction is opposite, so no electromagnetic waves are radiated. On the two antenna arms, the current direction is the same, so electromagnetic waves are radiated. In this embodiment, the microstrip balun, microstrip transmission line, and antenna arms are all laid on the surface of the dielectric substrate using a PCB microstrip line process based on a good conductor metal transmission line (such as copper wire).

[0032] In this embodiment, the first dielectric substrate 2 and the second dielectric substrate 3 are both made of F4B, and the relative permittivity of the first dielectric substrate 2 and the second dielectric substrate 3 is 4.3. The dimensions of the first dielectric substrate 2 are 33mm long * 26mm wide * 1mm thick, and the dimensions of the second dielectric substrate 3 are 33mm long * 18mm wide * 1mm thick. The overall dimensions of the printed dipole antenna after assembly are 50mm long * 35mm wide * 30mm thick.

[0033] This invention performs standing wave simulations on the aforementioned C-band and X-band antennas. The specific simulation results are as follows: Figure 4 , Figure 8 As shown.

[0034] This invention simulates the radiation pattern of the aforementioned C-band antenna at different frequencies. Specific simulation results are as follows: Figures 5-7As shown in the figure. The simulation results show that at a frequency of 4.5 GHz, the minimum gain of the C-band antenna within the beam range is -0.82 dBi; at a frequency of 5.1 GHz, the minimum gain of the C-band antenna within the beam range is -3.33 dBi; and at a frequency of 5.8 GHz, the minimum gain of the C-band antenna within the beam range is -0.97 dBi.

[0035] This invention simulates the radiation pattern of the aforementioned X-band antenna at different frequencies. Specific simulation results are as follows: Figures 9-11 As shown in the figure. The simulation results show that the minimum gain of the X-band antenna within the beam range is -3.16 dBi at a frequency of 8.5 GHz, -2.11 dBi at a frequency of 9.7 GHz, and -3.96 dBi at a frequency of 11 GHz.

[0036] According to the test results, the electrical performance indicators of the printed dipole antenna of this invention are shown in Table 1 below.

[0037] Table 1: Electrical Performance Indicators

[0038]

[0039]

[0040] The physical parameters of the printed dipole antenna of this invention are shown in Table 2 below.

[0041] Table 2: Physical Parameter Indicators

[0042]

[0043]

[0044] Based on the above simulation results and performance indicators, the printed dipole antenna of this invention achieves high gain, wide beam coverage, and high power capacity in the C-band and X-band, while also taking into account miniaturization, lightweight design, and environmental adaptability.

[0045] Finally, although embodiments of the present invention have been shown and described above, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A printed dipole antenna, characterized in that: The device includes a metal base plate (1), a first dielectric plate (2), a second dielectric plate (3), an antenna cover (4), and an antenna connector (5). The antenna cover (4) is located on the front of the metal base plate (1). The first dielectric plate (2) and the second dielectric plate (3) are located inside the antenna cover (4). The first dielectric plate (2) and the second dielectric plate (3) are parallel and vertically arranged on the front of the metal base plate (1). The distance between the first dielectric plate (2) and the second dielectric plate (3) is 24.5 mm. Both the first dielectric plate (2) and the second dielectric plate (3) are PCBs. A C-band antenna is provided on the first dielectric plate (2), and an X-band antenna is provided on the second dielectric plate (3). Two antenna connectors (5) are provided on the bottom surface of the metal base plate (1). The two antenna connectors (5) are connected to the C-band antenna and the X-band antenna, respectively.

2. The printed dipole antenna according to claim 1, characterized in that: The first dielectric substrate (2) and the second dielectric substrate (3) are both made of F4B, and the relative permittivity of the first dielectric substrate (2) and the second dielectric substrate (3) is 4.

3.

3. The printed dipole antenna according to claim 2, characterized in that: The metal base plate (1) has two bases (6) on the front, which correspond to the first medium plate (2) and the second medium plate (3) respectively. The bases (6) have slots, and the first medium plate (2) and the second medium plate (3) are respectively inserted into the corresponding slots and fixed to the bases (6) by screws (7).

4. The printed dipole antenna according to claim 2, characterized in that: The dimensions of the first dielectric substrate (2) are 33mm long * 26mm wide * 1mm thick. The dimensions of the first dielectric substrate (2) are 33mm long * 18mm wide * 1mm thick.

5. The printed dipole antenna according to claim 3, characterized in that: Both C-band and X-band antennas include a microstrip balun, a microstrip transmission line, and two antenna arms. The microstrip transmission line is connected to the microstrip balun, the antenna arms are connected to the microstrip transmission line, and the antenna connector (5) is connected to the microstrip balun.

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