A high-gain omnidirectional antenna

Abstract

The utility model belongs to the technical field of omnidirectional antennas, in particular to a high-gain omnidirectional antenna, comprising a vibrator circuit board and a roundness adjustment circuit board; a mounting groove is provided in the middle of the vibrator circuit board; a notch is provided in the middle of the roundness adjustment circuit board; the mounting groove and the notch are arranged crosswise; a metal sheet is fixedly connected to the side wall of the roundness adjustment circuit board; the metal sheet and the roundness adjustment circuit board are arranged correspondingly; the vibrator circuit board comprises a plurality of groups of vibrators of corresponding frequency bands; each group of the vibrators comprises two half-wave symmetrical vibrators; the two half-wave symmetrical vibrators comprised in each group of the vibrators are connected in parallel through a microstrip line on the vibrator circuit board, and impedance transformation is achieved through the microstrip line to achieve 50Ω matching, or high impedance matching is adopted; each group of the vibrators can adjust the feeding point position after parallel connection to a certain vibrator to achieve the electrical downtilt angle or uptilt angle of the antenna directional diagram.

Description

Technical Field

[0001] The utility model belongs to the technical field of omnidirectional antennas, in particular to a high-gain omnidirectional antenna. Background Art

[0002] An omnidirectional antenna is an antenna that radiates uniformly 360° in the horizontal pattern, meaning it transmits and receives signals uniformly in all azimuths. This property makes omnidirectional antennas ideal for applications where the direction of the target system or incoming signal is unknown or may come from multiple directions. An omnidirectional antenna exhibits a beam of a certain width in the vertical pattern, and generally speaking, the smaller the beam width, the greater the gain.

[0003] In the prior art, base station coverage antennas are generally directional antennas, and their beam width is relatively fixed, with only very small fluctuations depending on factors such as the environment. This feature limits the angle of the antenna coverage range. The existing electrically adjustable antenna adjusts the direction of the antenna main lobe by changing the phase and amplitude, thereby obtaining different inclination or elevation angles to achieve changes in coverage. This is the current mainstream implementation method of base station antennas. Its beam width is relatively fixed, so the coverage direction is also relatively fixed.

[0004] After long-term observation, it is found that the current omnidirectional coverage antenna is generally only used in indoor coverage scenarios. Its characteristics are small antenna size, very low gain, and very short coverage distance. It is usually densely used in underground parking lots, closed supermarkets and other places. In some outdoor areas with dense traffic, it is impossible to use low-gain omnidirectional antennas to achieve dense coverage at a long distance.

[0005] To this end, the utility model provides a high-gain omnidirectional antenna. Utility Model Content

[0006] In order to make up for the deficiencies of the prior art and solve at least one problem raised in the background technology, a high-gain omnidirectional antenna is proposed.

[0007] The technical solution adopted by the utility model to solve its technical problem is: the high-gain omnidirectional antenna described in the utility model includes a vibrator circuit board and a roundness adjustment circuit board; a mounting groove is opened in the middle of the vibrator circuit board; a notch is opened in the middle of the roundness adjustment circuit board; the mounting groove and the notch are cross-arranged.

[0008] Preferably, a metal sheet is fixedly connected to the side wall of the roundness adjustment circuit board; the metal sheet and the roundness adjustment circuit board are arranged correspondingly; in this step, by providing the metal sheet, the gap can be filled, thereby improving the roundness of the omnidirectional antenna.

[0009] Preferably, the vibrator circuit board includes multiple groups of vibrators of corresponding frequency bands; each group of vibrators includes two half-wave symmetrical vibrators.

[0010] Preferably, the two half-wave symmetrical vibrators included in each group of the vibrators are connected in parallel through a microstrip line on the vibrator circuit board, and impedance transformation is achieved through the microstrip line to achieve 50Ω matching, or high impedance matching is adopted; each group of the vibrators can be adjusted toward a certain vibrator through the feeding point position after parallel connection to achieve the electrical downtilt angle or upward elevation angle of the antenna radiation pattern; the distance between each two adjacent groups of the vibrators does not exceed one wavelength of the corresponding frequency band.

[0011] Preferably, each group of the vibrators can be connected in parallel via a microstrip line on a roundness adjustment circuit board; and adjustment of the position of the microstrip line feeding point on the roundness adjustment circuit board can achieve an electrical downtilt angle or an upward tilt angle of the antenna radiation pattern.

[0012] Preferably, the total width of the roundness adjustment circuit board does not exceed that of the vibrator circuit board; this step can reduce the influence of the total width of the roundness adjustment circuit board on the roundness index of the omnidirectional antenna by setting the total width of the roundness adjustment circuit board to not exceed that of the vibrator circuit board.

[0013] The beneficial effects of the utility model are as follows:

[0014] The high-gain omnidirectional antenna described in the utility model has a good out-of-roundness index and a relatively high gain, so as to meet the use requirements of outdoor open space coverage scenes. Due to its good roundness index, it can evenly cover the model in the direction of 360°, solving the problem of blind spots in the angle coverage between antennas when using directional antennas, thereby improving the quality of network coverage, reducing the number of installed antennas, reducing the difficulty of antenna construction, and greatly improving the efficiency of site construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model will be further described below in conjunction with the accompanying drawings.

[0016] Figure 1 It is a front structural schematic diagram of the vibrator circuit board in the utility model;

[0017] Figure 2 It is a schematic diagram of the back structure of the vibrator circuit board in the utility model;

[0018] Figure 3 It is a front structural schematic diagram of the roundness adjustment circuit board in the utility model;

[0019] Figure 4 It is a schematic diagram of the back structure of the roundness adjustment circuit board in the utility model;

[0020] Figure 5It is a schematic diagram of the combined structure of the vibrator circuit board and the roundness adjustment circuit board in the utility model;

[0021] Figure 6 It is a schematic diagram of the combined structure of the vibrator circuit board and the roundness adjustment circuit board in the utility model at another angle;

[0022] Figure 7 It is a schematic diagram of the matching structure of the vibrator circuit board, the roundness adjustment circuit board and the metal sheet;

[0023] Legend:

[0024] 1. Vibrator circuit board; 2. Roundness adjustment circuit board; 3. Mounting slot; 4. Notch; 5. Metal sheet. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Specific examples are given below.

[0027] like Figures 1 to 7 As shown, a high-gain omnidirectional antenna described in an embodiment of the utility model includes a vibrator circuit board 1 and a roundness adjustment circuit board 2; a mounting groove 3 is opened in the middle of the vibrator circuit board 1; a notch 4 is opened in the middle of the roundness adjustment circuit board 2; the mounting groove 3 and the notch 4 are cross-arranged.

[0028] A metal sheet 5 is fixedly connected to the side wall of the roundness adjustment circuit board 2; the metal sheet 5 and the roundness adjustment circuit board 2 are arranged correspondingly; in this step, by providing the metal sheet 5, the gap 4 can be filled, thereby improving the roundness of the omnidirectional antenna.

[0029] The vibrator circuit board 1 includes multiple groups of vibrators of corresponding frequency bands; each group of vibrators includes two half-wave symmetrical vibrators.

[0030] The two half-wave symmetrical vibrators included in each group of vibrators are connected in parallel through a microstrip line on the vibrator circuit board 1, and impedance transformation is achieved through the microstrip line to achieve 50Ω matching, or high impedance matching is adopted; each group of vibrators can be adjusted to a certain vibrator through the feeding point position after parallel connection to achieve the electrical downtilt angle or upward elevation angle of the antenna radiation pattern; the distance between each two adjacent groups of vibrators does not exceed one wavelength of the corresponding frequency band.

[0031] Each group of the oscillators can be connected in parallel via a microstrip line on the roundness adjustment circuit board 2; and the adjustment of the position of the microstrip line feeding point on the roundness adjustment circuit board 2 can achieve the electrical downtilt angle or uptilt angle of the antenna radiation pattern.

[0032] The total width of the roundness adjustment circuit board 2 does not exceed the vibrator circuit board 1; in this step, by setting the total width of the roundness adjustment circuit board 2 to not exceed the vibrator circuit board 1, the influence of the total width of the roundness adjustment circuit board 2 on the roundness index of the omnidirectional antenna can be reduced.

[0033] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A high-gain omnidirectional antenna, comprising a vibrator circuit board (1) and a roundness adjustment circuit board (2); characterized in that: The vibrator circuit board (1) has a mounting groove (3) in the middle; the roundness adjustment circuit board (2) has a notch (4) in the middle; the mounting groove (3) and the notch (4) are arranged crosswise.

2. A high-gain omnidirectional antenna according to claim 1, characterized in that: A metal sheet (5) is fixedly connected to the side wall of the roundness adjustment circuit board (2); the metal sheet (5) and the roundness adjustment circuit board (2) are arranged correspondingly.

3. A high-gain omnidirectional antenna according to claim 2, characterized in that: The vibrator circuit board (1) comprises a plurality of groups of vibrators of corresponding frequency bands; each group of vibrators comprises two half-wave symmetrical vibrators.

4. A high-gain omnidirectional antenna according to claim 3, characterized in that: The two half-wave symmetrical vibrators included in each group of vibrators are connected in parallel via a microstrip line on a vibrator circuit board (1), and impedance transformation is achieved via the microstrip line to achieve 50Ω matching, or high impedance matching is adopted; the vibrators in each group can be adjusted toward a certain vibrator through the position of the feeding point after parallel connection to achieve the electrical downtilt angle or uptilt angle of the antenna radiation pattern; the distance between each two adjacent groups of vibrators does not exceed one wavelength of the corresponding frequency band.

5. A high-gain omnidirectional antenna according to claim 4, characterized in that: Each group of the oscillators can be connected in parallel via a microstrip line on a roundness adjustment circuit board (2); and adjustment of the position of the microstrip line feeding point on the roundness adjustment circuit board (2) can achieve an electrical downtilt angle or an uptilt angle of the antenna radiation pattern.

6. A high-gain omnidirectional antenna according to claim 5, characterized in that: The total width of the roundness adjustment circuit board (2) does not exceed that of the vibrator circuit board (1).

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