A dual-frequency omnidirectional dipole antenna

Abstract

The present invention relates to the field of dual-frequency antennas, and refers to a dual-frequency omnidirectional dipole antenna, which solves the problems of dual-frequency bandwidth and the non-circularity and efficiency of the antenna horizontal plane omnidirectional pattern in the prior art. The present invention includes a microwave dielectric substrate, the dielectric substrate includes an edge gap and a feeding gap, the dielectric substrate is a left-right symmetrical structure; the left and right planes are divided into fixed area areas; the left and right planes are symmetrically provided with metal patches; the antenna has a high-frequency working frequency band and a low-frequency working frequency band: the low-frequency band|S 11 |<‑10dB impedance bandwidth is 4.1%, i.e. 2.4GHz~2.5GHz; the high frequency band |S 11 |<‑10dB impedance bandwidth is 18%, i.e. 5GHz~6GHz. The dual-frequency omnidirectional dipole antenna disclosed in the present invention is horizontal omnidirectional radiation, which effectively improves the dual-frequency bandwidth and the non-circularity and efficiency of the antenna horizontal plane omnidirectional pattern; and has a simple structure, reducing production and maintenance costs.

Description

Technical Field

[0001] The invention relates to the field of dual-frequency antennas, in particular to a dual-frequency omnidirectional dipole antenna. Background Art

[0002] In the prior art, the design of antennas and antenna structures generally rely on the experience of designers, which not only limits the design scope but also the design accuracy.

[0003] The antenna structure is limited by the product structure space, generally has a small size, and is difficult to design. The optimization performance improvement is limited and is limited by the solution space.

[0004] There is an urgent need for a new type of antenna that can solve the above problems. Summary of the invention

[0005] The present invention provides a dual-frequency omnidirectional dipole antenna, which solves the problems of dual-frequency bandwidth and non-circularity and efficiency of the omnidirectional radiation pattern of the antenna horizontal plane in the prior art.

[0006] The technical solution of the present invention is implemented as follows: a dual-frequency omnidirectional dipole antenna, comprising a microwave dielectric substrate, the dielectric substrate comprising an edge gap and a feeding gap, the dielectric substrate being a left-right symmetrical structure; the left and right planes are divided into fixed area regions; the left and right planes are symmetrically provided with metal patches; the antenna has a high-frequency working frequency band and a low-frequency working frequency band: the low-frequency band|S 11 |<-10dB impedance bandwidth is 4.1%, i.e. 2.4GHz~2.5GHz; the high frequency band |S 11 |<-10dB impedance bandwidth is 18%, i.e. 5GHz~6GHz.

[0007] The dielectric substrate is a 20mm*40mm substrate with a 1mm edge gap and a 2mm feeding gap; the feeding gap is located at the center of the upper and lower parts of the dipole, and is provided with a feeding point connected by an IPEX coaxial line with one end exposed; the fixed area is a rectangular area with a length of 18*9, a length of 2mm, and a width of 1mm.

[0008] The distribution of the metal patches is:

[0009]

[0010] The distribution of the metal patches is:

[0011]

[0012] The distribution of the metal patches is:

[0013]

[0014] The dual-frequency omnidirectional dipole antenna disclosed in the present invention has horizontal omnidirectional radiation, effectively improves the dual-frequency bandwidth and the non-circularity and efficiency of the antenna horizontal plane omnidirectional pattern; and has a simple structure, reducing production and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 : A schematic structural diagram of the present invention;

[0017] Figure 2 : Schematic diagram of the patch of embodiment 2;

[0018] Figure 3 : Schematic diagram of the patch of embodiment 2;

[0019] Figure 4 : Schematic diagram of the patch of embodiment 2;

[0020] Figure 5 :Antenna of Embodiment 1|S 11 |Simulation curves and simulated radiation patterns at 2.45GHz and 5.5GHz;

[0021] Figure 6 : Horizontal plane gain diagram of the antenna at 2.45 GHz and 5.5 GHz of Example 1;

[0022] Figure 7 : Antenna of Embodiment 2 |S 11 |Simulation curve;

[0023] Figure 8 : Horizontal plane gain diagram of the antenna of Example 2 at 2.45GHz and 5.5GHz;

[0024] Fig. 9 : Antenna of Embodiment 3 |S 11 |Simulation curve;

[0025] Fig.10 : Horizontal plane gain diagram of the antenna of Example 3 at 2.45GHz and 5.5GHz;

[0026] Among them: 1, 2, 3, 4, 5, 6, 7,. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figure 1 As shown in the structural schematic diagram of the present invention, a dual-frequency omnidirectional dipole antenna disclosed in the present invention includes a microwave dielectric substrate, the dielectric substrate includes an edge gap 4 and a feeding gap 2, and the dielectric substrate is a left-right symmetrical structure; the left and right planes are divided into fixed area areas; the left and right planes are symmetrically provided with metal patches 1; the antenna has a high-frequency working frequency band and a low-frequency working frequency band: the low-frequency band|S 11 |<-10dB impedance bandwidth is 4.1%, i.e. 2.4GHz~2.5GHz; the high frequency band |S 11 |<-10dB impedance bandwidth is 18%, i.e. 5GHz~6GHz

[0029] The dielectric substrate is a 20mm*40mm substrate, having a 1mm edge gap 4 and a 2mm feeding gap 2; the feeding gap 2 is located at the center of the upper and lower parts of the dipole, and is provided with a feeding point 3 connected by an IPEX coaxial line with one end exposed; the fixed area region is a rectangular region with a length of 18*9, a length of 2mm, and a width of 1mm.

[0030] like Figure 2 As shown in the patch structure diagram of the first embodiment, the distribution of the metal patch 1 is as follows:

[0031]

[0032] pass Figure 5 Antenna of Embodiment 1 |S 11 | From the simulation curve, we can see that the antenna has two working frequency bands, among which the low frequency band |S 11 |<-10dB impedance bandwidth is 2.25GHz-2.75GHz (20%), while the high frequency band |S 11 |<-10dB impedance bandwidth is 4.9GHz-6.34GHz (25.6%); passed Figure 6 The horizontal plane gain diagrams of the antenna of Example 1 at 2.45 GHz and 5.5 GHz, the horizontal omnidirectional non-circularity of the antenna are 0.26 dB and 1.34 dB respectively.

[0033] like Figure 3 As shown in the patch schematic diagram of the second embodiment, the distribution of the metal patch 1 is as follows:

[0034]

[0035] Figure 7 Antenna of Embodiment 1 |S 11 | From the simulation curve, we can see that the antenna has two working frequency bands, among which the low frequency band |S 11 |<-10dB impedance bandwidth is 2.27GHz-2.72GHz (18%), while the high frequency band |S 11 |<-10dB impedance bandwidth is 4.8GHz-6.82GHz (34.7%); passed Figure 8 The horizontal plane gain diagrams of the antenna of Example 1 at 2.45 GHz and 5.5 GHz, the horizontal omnidirectional non-circularity of the antenna are 0.4 dB and 1.48 dB respectively.

[0036] like Figure 4 As shown in the patch schematic diagram of the third embodiment, the distribution of the metal patch 1 is as follows:

[0037]

[0038] Fig. 9 Antenna of Embodiment 1 |S 11 | From the simulation curve, we can see that the antenna has two working frequency bands, among which the low frequency band |S 11 |<-10dB impedance bandwidth is 2.28GHz-2.74GHz (18.3%), while the high frequency band |S 11 |<-10dB impedance bandwidth is 4.97GHz-6.06GHz (19.7%); passed Fig.10 The horizontal plane gain diagrams of the antenna of Example 1 at 2.45 GHz and 5.5 GHz, the horizontal omnidirectional non-circularity of the antenna are 0.27 dB and 1.31 dB respectively.

[0039] The dual-frequency omnidirectional dipole antenna disclosed in the present invention has horizontal omnidirectional radiation, effectively improves the dual-frequency bandwidth and the non-circularity and efficiency of the antenna horizontal plane omnidirectional pattern; and has a simple structure, reducing production and maintenance costs.

[0040] Of course, without departing from the spirit and essence of the invention, technicians familiar with the field should be able to make various corresponding changes and modifications based on the invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the invention.

Claims

1. A dual-frequency omnidirectional dipole antenna, comprising a microwave dielectric substrate, wherein the dielectric substrate comprises an edge gap and a feed gap, Features: The dielectric substrate is a bilaterally symmetrical structure; the upper and lower planes are divided into fixed area regions; Metal patches are symmetrically arranged on the left and right planes; The antenna has a high-frequency working band and a low-frequency working band: the low-frequency band |S 11 |<-10dB impedance bandwidth is 4.1%, i.e. 2.4GHz~2.5GHz; the high frequency band |S 11 |<-10dB impedance bandwidth is 18%, i.e. 5GHz to 6GHz; the dielectric substrate is a 20mm*40mm substrate with a 1mm edge gap and a 2mm feed gap; The feed gap is located at the center of the upper and lower parts of the dipole, and is provided with a feed point connected by an IPEX coaxial line with one end exposed; The fixed area is a rectangular area with a length of 18*9 and a length of 2mm and a width of 1mm; The distribution of the metal patches is:

2. A dual-frequency omnidirectional dipole antenna according to claim 1, Features: The distribution of the metal patches is:

3. A dual-frequency omnidirectional dipole antenna design method according to claim 1, Features: The distribution of the metal patches is:

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