A small dual-frequency dual-line high-gain omnidirectional antenna

Abstract

The present invention discloses a small dual-frequency dual-line high-gain omnidirectional antenna, which is characterized by comprising a splitter integrated on a PCB board, and high-frequency and low-frequency radiation units arranged on one side of the splitter, the high-frequency and low-frequency radiation units are connected to the splitter through a coaxial line, the high-frequency and low-frequency radiation units use the same radiation unit, the radiation units are arranged in an array form and connected through microstrip lines, the high-frequency radiation unit outputs signals through a high-frequency output port, and the low-frequency radiation unit outputs signals through a low-frequency output port. The antenna has a simple structure and low production cost, and has the advantages of dual ports, high isolation, good omnidirectionality, high gain, small size, etc.

Description

Technical Field

[0001] The invention relates to the field of wireless communications, and in particular to a small dual-frequency dual-line high-gain omnidirectional antenna. Background Art

[0002] Omnidirectional antennas radiate uniformly at 360° in the horizontal pattern, which is usually called non-directional. In the vertical pattern, they have a beam with a certain width. Generally, the smaller the beam width, the greater the gain. Omnidirectional antennas are generally used in suburban and large-area stations in mobile communication systems, with a large coverage area.

[0003] The communication system is a combination of wired and wireless. The transmission and reception of wireless signals in space are both achieved by antennas. It can be seen that antennas play a vital role in wireless communication systems. With the diversification of communication equipment frequency band applications and the restrictions on the miniaturization and number of equipment antennas, the application demand for miniaturized dual-band dual-line high-gain antennas is becoming more and more widespread.

[0004] In the technology of miniaturized dual-band dual-line high-gain omnidirectional antenna, dual output, high gain and omnidirectional are all very important indicators. In order to improve the isolation of the antenna system, the existing technology mainly increases the distance between antenna units and increases isolation plates to improve the isolation, but this will result in a larger volume of the antenna system. In order to meet the circularity and gain of the multi-frequency directional diagram, the existing technology mainly adopts a high- and low-frequency separation design, which will also cause the antenna size to be too large, which is not conducive to the miniaturization of mobile terminals, especially in devices with smaller size, such as mobile phones. If the antenna size is too large, the size of the electronic device will be very large. Summary of the invention

[0005] The purpose of the present invention is to provide a small dual-frequency dual-line high-gain omnidirectional antenna, which has the advantages of simple structure, low production cost, dual ports, good isolation, high gain, good omnidirectionality, small size and the like.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a small dual-frequency dual-line high-gain omnidirectional antenna, including a splitter integrated on a PCB board, and high and low frequency radiation units arranged on one side of the splitter, the high and low frequency radiation units are connected to the splitter through a coaxial line, the high and low frequency radiation units use the same radiation unit, the radiation units are arranged in an array form and connected through microstrip lines, the high frequency radiation unit outputs signals through a high frequency output port, and the low frequency radiation unit outputs signals through a low frequency output port.

[0007] In the above technical solution, the splitter adopts double-sided copper-clad PCB, which includes a splitter high-frequency filter unit and a splitter low-frequency filter unit. The splitter is connected to a 1 / 4 wavelength short-circuit band, and the coaxial line is connected to the feed end of the splitter.

[0008] In the above technical solution, the splitter high-frequency filter unit is composed of an equivalent inductor circuit, and the splitter low-frequency filter unit is composed of an equivalent capacitor circuit.

[0009] In the above technical solution, a dipole is used as a unit radiation oscillator in the radiation unit, which is fed by parallel feeding, and a feeding point is set in the middle of the radiation unit.

[0010] In the above technical solution, the unit radiation vibrator adopts double-sided copper cladding of PCB.

[0011] In the above technical solution, one end of the coaxial line is connected to the splitter, and the other end is connected to the microstrip line.

[0012] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0013] 1. In the present invention, the high and low frequency radiation units adopt the same radiation unit, which is connected to the splitter through a coaxial line. The splitter realizes high isolation of high and low frequency signals. Compared with the traditional high and low frequency separation design and the method of adding isolation plates, the size of the antenna is greatly reduced, which is conducive to the miniaturization of mobile terminals.

[0014] 2. The radiation units are arranged in an array form, which can improve the gain and meet the requirements of omnidirectional high gain that we want to design.

[0015] 3. The radiation unit and the splitter are integrated on the same PCB board to achieve miniaturization of the antenna, while simplifying the production and processing of the antenna, greatly reducing manual debugging time and production costs.

[0016] 4. The radiating unit uses a dipole as the unit radiating element, which is fed by parallel feeding. A feeding point is set in the middle of the radiating unit. This structural design greatly improves the feeding phase inconsistency of each radiating unit, and due to the symmetry of the structure, it can better maintain the stability of the antenna main lobe pointing.

[0017] 5. The splitter adopts double-sided copper cladding of PCB, including the splitter high-frequency filter unit and the splitter low-frequency filter unit. The splitter high-frequency filter unit is composed of equivalent inductance and can only pass low-frequency signals. The splitter low-frequency filter unit is composed of equivalent capacitance and can only pass high-frequency signals to achieve separation of high and low frequency signals.

[0018] 6. The high-frequency radiation unit outputs signals through the high-frequency output port, and the low-frequency radiation unit outputs signals through the low-frequency output port. Two signal output terminals are provided.

[0019] 7. The splitter is connected with a 1 / 4 wavelength short-circuit strip. The combination of the 1 / 4 wavelength short-circuit strip and the splitter can greatly improve the isolation between the low-frequency output port and the high-frequency output port. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the antenna of the present invention;

[0021] Figure 2 It is a structural diagram of the antenna of the present invention.

[0022] Among them: 1. low frequency output port; 2. high frequency output port; 3. splitter high frequency filter unit; 4. splitter low frequency filter unit; 5. low frequency radiation unit; 6. high frequency radiation unit; 7. microstrip line; 8. splitter; 9. PCB board; 10. coaxial line; 11. 1 / 4 wavelength short circuit strip. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0024] Example 1: See Figures 1-2 As shown, a small dual-frequency dual-line high-gain omnidirectional antenna includes a splitter 8 integrated on a PCB board 9, and a high-frequency radiation unit 6 and a low-frequency radiation unit 5 arranged on one side of the splitter 8. The radiation unit and the splitter 8 are integrated on the same PCB board 9, so as to realize the miniaturization of the antenna, simplify the manufacture and processing of the antenna, and greatly reduce the manual debugging time and production cost. The high-frequency radiation unit 6 and the low-frequency radiation unit 5 are connected to the splitter 8 through a coaxial line 10, and the splitter 8 realizes high isolation of high and low frequency signals. Compared with the traditional high and low frequency separation design and the method of adding an isolation plate, the size of the antenna is greatly reduced, which is conducive to the miniaturization of mobile terminals. The high-frequency radiation unit 6 and the low-frequency radiation unit 5 use the same radiation unit, and the radiation units are arranged in an array form and connected through a microstrip line 7 to improve the gain and realize omnidirectionality. The high-frequency radiation unit 6 outputs signals through the high-frequency output port 2, and the low-frequency radiation unit 5 outputs signals through the low-frequency output port 1.

[0025] like Figures 1-2 As shown, the splitter 8 adopts double-sided copper-clad PCB, which includes a splitter high-frequency filter unit 3 and a splitter low-frequency filter unit 4. The splitter is connected to a 1 / 4 wavelength short-circuit band 11, and the coaxial line 10 is connected to the feed end of the splitter 8.

[0026] like Figures 1-2As shown, the splitter high-frequency filter unit 3 is composed of an equivalent inductance circuit and can only pass low-frequency signals. The splitter low-frequency filter unit 4 is composed of an equivalent capacitance circuit and can only pass high-frequency signals to achieve separation of high and low frequency signals.

[0027] like Figures 1-2 As shown, the radiating unit adopts a dipole as a unit radiating element, which is fed by parallel feeding. A feeding point is set in the middle of the radiating unit, so that the feeding phase inconsistency of each radiating unit is greatly improved, and due to the symmetry of the structure, the stability of the main lobe pointing of the antenna can be better maintained.

[0028] like Figures 1-2 As shown, the unit radiation vibrator adopts double-sided copper cladding of PCB.

[0029] like Figures 1-2 As shown, one end of the coaxial line 10 is connected to the splitter 8 , and the other end is connected to the microstrip line 7 .

[0030] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A small dual-frequency dual-line high-gain omnidirectional antenna, characterized in that: It includes a splitter integrated on a PCB board, and high-frequency and low-frequency radiation units arranged on one side of the splitter, the high-frequency and low-frequency radiation units are connected to the splitter through a coaxial line, the high-frequency and low-frequency radiation units use the same radiation unit, the radiation units are arranged in an array form and connected through microstrip lines, the high-frequency radiation unit outputs signals through a high-frequency output port, and the low-frequency radiation unit outputs signals through a low-frequency output port; The splitter is connected to a 1 / 4 wavelength short-circuit strip; The splitter adopts a double-sided copper-clad PCB, which includes a splitter high-frequency filter unit and a splitter low-frequency filter unit. The coaxial line is connected to the feeder end of the splitter; The splitter high-frequency filter unit is composed of an equivalent inductance circuit, and the splitter low-frequency filter unit is composed of an equivalent capacitance circuit.

2. The small dual-frequency dual-line high-gain omnidirectional antenna according to claim 1, characterized in that: The radiating unit adopts a dipole as a unit radiating vibrator, which is fed by a parallel feeding method, and a feeding point is arranged in the middle of the radiating unit.

3. According to claim 2, the small dual-frequency dual-line high-gain omnidirectional antenna is characterized by: The unit radiation vibrator adopts double-sided copper cladding of PCB.

4. The small dual-frequency dual-line high-gain omnidirectional antenna according to claim 1, characterized in that: One end of the coaxial line is connected to the splitter, and the other end is connected to the microstrip line.

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