Ultra-wideband slot antenna with integrated solar cell

Abstract

The present invention discloses an ultra-wideband slot antenna with integrated solar cells, which operates in the 1.47-5.53GHz frequency band and includes a radiating body, a feeding structure, a filtering structure, a pad, and a dielectric substrate; the radiating body is located on the upper surface of the dielectric substrate and is composed of two solar cells connected in series; the feeding structure is located on the lower surface of the dielectric substrate and uses slot excitation for the radiating body; the filtering structure is located on the lower surface of the dielectric substrate and is connected to the metal bus bar through the bus bar vias; the pad structure is located on the lower surface of the dielectric substrate and is used to fix the SMA connector; the metal bus bar forms a "T"-shaped slot; the solar cell and the metal bus bar form an "I"-shaped slot. The ultra-wideband slot antenna with integrated solar cells of the present invention can cover the 1.47-5.53GHz frequency band by introducing the metal bus bar and the feeder branch structure, thereby achieving the performance of an ultra-wideband antenna.

Description

Technical Field

[0001] The present invention relates to the technical field of solar cell antennas, and in particular to an ultra-wideband slot antenna integrated with a solar cell. Background Art

[0002] At present, the continuous innovation of science and technology has promoted the development of modern wireless communication technology, and the demand for antennas in communication systems is steadily increasing.

[0003] Solar energy, as a green and renewable energy source, has attracted widespread attention from researchers. Solar cell antennas, which can simultaneously generate photovoltaic power while performing wireless communications, are an effective approach to achieving green communications. However, existing antennas have low solar energy utilization rates, complex structures, and narrow bandwidths. Summary of the Invention

[0004] The purpose of the present invention is to address the problems of low solar energy utilization, complex structure and narrow frequency band in the antenna of the prior art, and to provide an ultra-wideband slot antenna with integrated solar cells. By introducing metal busbars and feeder branches, the performance of the ultra-wideband antenna is achieved.

[0005] The technical solution adopted to achieve the purpose of the present invention is:

[0006] An ultra-wideband slot antenna with integrated solar cells, operating in the 1.47-5.53GHz frequency band, comprises a radiating element, a feeding structure, a filtering structure, a soldering pad, and a dielectric substrate. The radiating element is located on the upper surface of the dielectric substrate and is composed of two solar cells connected in series. Metal busbars are arranged at both ends of the cell string to connect the solar cells in series. The feeding structure is located on the lower surface of the dielectric substrate and uses slot excitation to drive the radiating element. The filtering structure is located on the lower surface of the dielectric substrate and is connected to the metal busbar via busbar vias. The soldering pad structure is located on the lower surface of the dielectric substrate and is used to secure an SMA connector. The metal busbar forms a "T"-shaped slot. An "I"-shaped slot is formed between the two solar cells and the metal busbar.

[0007] The ultra-wideband slot antenna with integrated solar cell of the present invention can cover the 1.47-5.53 GHz frequency band by introducing a metal busbar and a feeder branch structure, thereby achieving the performance of an ultra-wideband antenna.

[0008] The ultra-wideband slot antenna with integrated solar cells of the present invention adopts a metal busbar with a "T"-shaped slot for impedance adjustment; an "I"-shaped slot formed by two solar cells and the metal busbar is used to radiate energy outward, thereby realizing an integrated design of the solar cell ultra-wideband antenna, covering the 1.7-2.7GHz, 3.3-3.8GHz, and 4.8-5GHz frequency bands of base station antennas. It has a scientific structure, low system complexity, and has practical application and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 1 is a schematic structural diagram of an ultra-wideband slot antenna integrated with a solar cell according to an embodiment of the present invention.

[0010] Figure 2 1 is a schematic top view of the structure of an ultra-wideband slot antenna integrated with a solar cell according to an embodiment of the present invention.

[0011] Figure 3 1 and 2 are S parameters and gain diagrams obtained by simulating the ultra-wideband slot antenna integrated with a solar cell according to an embodiment of the present invention.

[0012] Figure 4 The radiation pattern obtained by simulating the ultra-wideband slot antenna of the integrated solar cell according to the embodiment of the present invention is

[0013] in:

[0014] 1. Solar cell; 2. Metal busbar; 3. Feeder; 4. Inductor; 5. DC feeder; 6. Solder pad; 7. Busbar via; 8. SMA connector mounting end; 9. Dielectric substrate. DETAILED DESCRIPTION

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0016] The solar cell antenna of an embodiment of the present invention uses a metal busbar with a "T"-shaped gap to adjust impedance. The metal busbar with the "T"-shaped gap is used to connect two solar cells, forming an "I"-shaped gap between the two solar cells. Signals are radiated through the "I"-shaped gap, and impedance matching is improved by the "T"-shaped gap, so that the online antenna has ultra-wideband performance, with a relative bandwidth of 116%.

[0017] The ultra-wideband slot antenna with integrated solar cells in an embodiment of the present invention utilizes a metal busbar with a T-shaped slot and an I-shaped slot formed between two solar cells to radiate energy, thereby achieving an integrated solar cell broadband antenna design. The antenna covers the 1.7-2.7 GHz, 3.3-3.8 GHz, and 4.8-5 GHz frequency bands of base station antennas, and has low system complexity.

[0018] refer to Figures 1 to 2 As shown, an ultra-wideband slot antenna with integrated solar cells has an operating frequency covering 1.47-5.53 GHz and includes a radiating body, a feeding structure, a filtering structure, and a dielectric substrate. The radiating body is composed of two solar cells and is located on the upper surface of the dielectric substrate. The solar cells are connected by metal bus bars at both ends of the solar cells. The feeding structure is located on the lower surface of the dielectric substrate. Slot excitation is applied to the radiating body, and the SMA connector mounting end at the end of the feed line of the feeding structure is connected to the SMA connector. The filtering structure is located on the lower surface of the dielectric substrate and is connected to the metal bus bar on the upper surface through the bus bar vias. The pad structure is located on the lower surface of the dielectric substrate and is connected to the outer core of the SMA connector.

[0019] In some embodiments, there are two solder pads, symmetrically arranged on both sides of the feeder, below one of the solar cells, and two filter structures, symmetrically arranged on both sides of the feeder, each connected to one of the metal busbars through a busbar via.

[0020] Among them, the metal busbar is a metal busbar with a "T"-shaped gap. There are two of them, which are arranged symmetrically. The two solar cells are connected in series. The metal busbar with a "T"-shaped gap is used to connect the two solar cells. An "I"-shaped gap will be formed between the two solar cells. It has ultra-wideband performance and the relative bandwidth reaches 116%.

[0021] Among them, the two "T"-shaped gaps are arranged symmetrically, and each is located in the relative protrusions of the metal bus strip forming the "I"-shaped gap between the two solar cells. When viewed from above, the "T"-shaped gap is in the shape of a "T" after being laid down horizontally, and the horizontal heads of the two "T"-shaped gaps are opposite and arranged in parallel, perpendicular to the long sides of the solar cells, and located in the relative protrusions of the metal bus strip. The vertical parts of the bottom of the two "T"-shaped gaps are arranged horizontally (parallel to the long sides of the solar cells) and extend to the side wall of the metal bus strip, and the metal bus strips are separated at the sides.

[0022] In the embodiment of the present application, the two solar cells are rectangular in shape and are arranged parallel to each other.

[0023] In some embodiments, each of the solar cells has a width of 21.6 mm and a length of 57.5 mm, and has the same structure and size.

[0024] In some embodiments, the filtering structure includes an inductor and a DC feeder. The inductor is connected to the linear feeder and connected to the metal busbar on the upper surface of the dielectric substrate via a busbar via. The DC feeder is an L-shaped feeder, extending perpendicularly from the lengthwise side of the dielectric substrate to the opposite side, then bending perpendicularly to the widthwise side to connect to the inductor and finally to the busbar via. Preferably, the feeders of the feed structure are arranged symmetrically about their axis.

[0025] In some embodiments, the dielectric substrate has a length of 61.5 mm, a width of 50 mm, and a thickness of 1 mm, and is preferably a foam dielectric board.

[0026] Figure 3 The S11 and gain of the antenna using the embodiment of the present invention are shown. Figure 3 It can be seen that the solar cell antenna provided by the embodiment of the present invention adopting this design method covers the frequency band of 1.47-5.53 GHz, achieves a relative bandwidth matching design of 116%, and realizes the design of an ultra-wideband solar cell antenna; and in the entire frequency band, the average gain is 3.5 dBi and the peak gain is 5.9 dBi.

[0027] Figure 4 The radiation pattern of the antenna using an embodiment of the present invention in the 1.7 GHz frequency band is demonstrated. This pattern conforms to the characteristics of an omnidirectional antenna, with the main polarization being uniformly symmetrical in the forward and backward directions, capable of achieving signal coverage over a wide range. The cross-polarization is below -25 dB, and the radiation energy of the antenna's E-plane (electric plane, i.e., the plane parallel to the direction of the electric field) and H-plane (magnetic plane, i.e., the plane parallel to the direction of the magnetic field) is mainly concentrated in the normal direction, exhibiting good stability. The radiation pattern maintains good directivity in the target frequency band.

[0028] In summary, the ultra-wideband slot antenna with integrated solar cells provided by the present invention, while also using solar cells as the radiation main body, achieves ultra-wideband performance by connecting two solar cells through a metal bus bar and adding branches on the feeder, which has great practical significance.

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An ultra-wideband slot antenna integrated with a solar cell, characterized in that: The invention works in the 1.47-5.53GHz frequency band and includes a radiating body, a feeding structure, a filtering structure, a soldering pad, and a dielectric substrate. The radiating body is located on the upper surface of the dielectric substrate and is composed of two solar cells connected in series. The solar cells are connected in series through metal bus strips at both ends of the solar cells. There are two metal bus strips arranged symmetrically. The feeding structure is located on the lower surface of the dielectric substrate and adopts slot excitation for the radiating body. The SMA connector mounting end at the end of the feed line of the feeding structure is connected to the SMA connector. The filtering structure is located on the lower surface of the dielectric substrate and is connected to the metal bus strip through the bus strip via. The soldering pad is located on the lower surface of the dielectric substrate and is used to fix the SMA connector. The metal bus strip forms a "T"-shaped slot. Two solar cells are connected by a metal busbar with a "T"-shaped gap, forming an "I"-shaped gap between the two solar cells; the two "T"-shaped gaps are symmetrically arranged, each located in the opposite protrusions of the metal busbar forming the "I"-shaped gap between the two solar cells. When viewed from above, the "T"-shaped gap is in the shape of a "T" laid down horizontally, and the horizontal heads of the two "T"-shaped gaps are opposite and arranged in parallel, perpendicular to the long sides of the solar cells, and located in the opposite protrusions of the metal busbar. The vertical parts of the bottom of the two "T"-shaped gaps are arranged horizontally, parallel to the long sides of the solar cells, and extend to the side walls of the metal busbar, and the metal busbar is separated at the side.

2. The ultra-wideband slot antenna integrated with a solar cell according to claim 1, wherein: There are two solder pads, which are symmetrically arranged on both sides of the feeder and below one of the solar cells; there are two filter structures, which are symmetrically arranged on both sides of the feeder and each of which is connected to one of the metal busbars through a busbar via.

3. The ultra-wideband slot antenna integrated with a solar cell according to claim 1, wherein: The two solar cells are rectangular in shape and arranged parallel to each other.

4. The ultra-wideband slot antenna integrated with a solar cell according to claim 1, wherein: The solar cell has a width of 21.6 mm and a length of 57.5 mm.

5. The ultra-wideband slot antenna integrated with a solar cell according to claim 1, wherein: The filtering structure includes an inductor and a DC feeder, wherein the inductor is connected to the straight feeder; the DC feeder is an L-shaped feeder, which extends vertically from the length direction side of the dielectric substrate to the opposite side, then bends vertically to extend to the width direction side, connects to the inductor, and is then connected to the busbar via, and is arranged symmetrically with respect to the axis direction of the feeder of the feeding structure.

6. The ultra-wideband slot antenna integrated with a solar cell according to claim 1, wherein: One end of the feeder line of the feed structure is connected to the outer core of the SMA connector.

7. The ultra-wideband slot antenna integrated with a solar cell according to claim 1, wherein: The dielectric substrate is a foam board with a thickness of 1 mm.

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