Planar arc electric dipole yagi antenna with reduced size
By adopting a planar arc electric dipole structure and a T-type dipole design in Yagi antenna, combined with an arc parasitic unit, the problem of insufficient gain and front-rear ratio of the existing technology is solved, and a stable gain is achieved With high front-to-back ratio, it reduces cost and is suitable for applications with limited space.
Patent Information
- Application Number
- CN202421045340.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-14
AI Technical Summary
The existing Yagi antenna is difficult to achieve stable gain and high front-to-back ratio during miniaturization, and it is complex in structure and high cost, so it cannot effectively suppress backward synchronous interference, adapting to application needs with limited space.
A plane arc dipole Yagi antenna with reduced size is designed, using T-type dipole structure and coaxial feeder on the dielectric substrate, combined with arc parasitic units, to form directional radiation, simplifying the structure and reducing costs .
It realizes a stable gain and high front-to-back ratio, effectively suppresses backward co-frequency interference, reduces the antenna volume, is suitable for application scenarios with limited space, and reduces production costs.
Smart Images
Figure CN222261378U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a plane arc electric dipole Yagi antenna with reduced size, belonging to the technical field of antennas. Background Art
[0002] With the development of communication technology, the requirements for the size and gain of antennas are becoming more and more stringent. Microstrip Yagi antennas have become a common directional antenna unit due to their simple structure and easy design. The reduced size of the microstrip Yagi antenna structure can achieve good directional radiation and can be better applied in limited space.
[0003] With the development of wireless communication technology, communication equipment is becoming more and more miniaturized. Planar end-fire antennas are more widely used in handheld devices, cordless phones and communication blind spots than omnidirectional antennas. In addition, dipole antennas have a simple structure, low manufacturing cost and good performance parameters. In the field of miniaturization of Yagi antennas, new vibrator structures are a key research direction. The new vibrator structure can achieve stable gain and high front-to-back ratio in the Yagi antenna design within the working frequency band, and the high front-to-back ratio antenna can effectively suppress the backward co-channel interference and improve the antenna performance. The design is based on this model. Summary of the invention
[0004] The technical problem to be solved by the utility model is: the utility model provides a planar arc electric dipole Yagi antenna with reduced size, which is used to realize the end-fire antenna design, and has not only a simple planar structure, but also a stable gain and a high front-to-back ratio. The high front-to-back ratio can effectively suppress the backward co-frequency interference, and has a simple structure and occupies a small space volume, which is suitable for use in places with limited space.
[0005] The technical solution of the utility model is: a reduced-size planar arc electric dipole Yagi antenna, comprising a director unit 7, an active dipole unit 2, an active dipole arc parasitic unit 3, a coaxial feeder 4, a reflector unit 5, a reflector arc parasitic unit 6, a director arc parasitic unit 8 and a dielectric substrate 1;
[0006] The upper surface of the dielectric substrate 1 includes the right radiator, the director unit 7 and the director arc parasitic unit 8 in the active oscillator unit 2; the left radiator, the reflector unit 5 and the reflector arc parasitic unit 6 of the active oscillator unit 2 are arranged on the lower surface of the dielectric substrate 1, the active oscillator unit 2 is symmetrical about the coaxial feeder 4, the director arc parasitic units 8 are arranged at both ends of the director unit 7, the right radiator and the left radiator in the active oscillator unit 2 are also provided with active oscillator arc parasitic units 3 at both ends, the upper and lower ends of the coaxial feeder 4 are respectively connected to the active oscillator unit 2 and the reflector unit 5, and the reflector arc parasitic units 6 are arranged at both ends of the reflector unit 5.
[0007] Furthermore, the director arc parasitic unit 8, the active vibrator arc parasitic unit 3, and the reflector arc parasitic unit 6; the active vibrator arc parasitic unit 3 and the reflector arc parasitic unit 6 have the same structure.
[0008] The reflector arc parasitic units 6 provided at both ends of the reflector unit 5 are combined into a hollow ring structure with an outer radius of 5.5 mm and an inner radius of 4.5 mm, and the space between the outer radius and the inner radius is solid;
[0009] The director arc parasitic units 8 provided at both ends of the director unit 7 are combined into a hollow ring structure with an outer radius of 4.5 mm and an inner radius of 3.5 mm, and the space between the outer radius and the inner radius is solid.
[0010] Furthermore, the length of the active vibrator unit 2 is greater than the length of the director unit 7 and shorter than the length of the reflector unit 5 .
[0011] Furthermore, the dielectric substrate 1 is made of FR4 material with a dielectric constant of 4.4 and a loss tangent of 0.02.
[0012] Furthermore, the coaxial feed line 4 feeds the active oscillator unit 2 and adjusts impedance matching, and the material is copper.
[0013] Furthermore, the active oscillator unit 2 adopts a radiator T-type dipole structure.
[0014] Furthermore, the combination of the director arc parasitic unit 8 and the director unit 7, the combination of the reflector arc parasitic unit 6 and the reflector unit 5, and the combination of the active vibrator arc parasitic unit 3 and the active vibrator unit 2 on the dielectric substrate 1 allows the radiator T-type dipole structure adopted by the active vibrator unit 2 to emit an electromagnetic field to form directional radiation.
[0015] Furthermore, the active vibrator unit 2 , the director unit 7 , the reflector unit 5 , the director arc parasitic unit 8 , the reflector arc parasitic unit 6 , and the active vibrator arc parasitic unit 3 are all made of copper.
[0016] Furthermore, the sizes of the director unit 7, the active vibrator unit 2, and the reflector unit 5 are 20 mm, 36 mm, and 52 mm, respectively.
[0017] The electric dipole Yagi antenna of the utility model has a novel structure, and arc parasitic structures are added to the active vibrator unit, the reflector unit, and the director unit, which not only improves the gain of the antenna and broadens the bandwidth, but also reduces the size of the Yagi antenna and the length of the antenna unit, and is particularly suitable for scenes with limited space volume. The Yagi antenna of the utility model can effectively reduce the size and volume of the antenna unit, adopts a planar structure, and the manufacturing process is compatible with the manufacturing process of the Yagi antenna in the prior art. The technology is mature, the manufacturing cost is low, and it can be well used in communication systems.
[0018] The utility model has the following beneficial effects: the utility model provides a reduced-size microstrip Yagi antenna, the T-type dipole printed on the bottom of the dielectric substrate is equivalent to an electric dipole, and a coaxial feeder is used for feeding, which has a high front-to-back ratio, broadband, and stable gain. The utility model adopts a microstrip planar structure to form a directional radiation pattern, which can effectively reduce the volume, has a simple structure, low cost, and is easy to use, and is suitable for placing in blind areas where communication signal coverage is weak and space is limited. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the structure of the electric dipole Yagi antenna in the prior art;
[0020] Figure 2 This is a schematic structural diagram of an electric dipole Yagi antenna according to Embodiment 1 of the present utility model;
[0021] Figure 3 The structure of the electric dipole Yagi antenna of the first embodiment of the utility model is shown in FIG. Figure 2 In order to better distinguish the components on the upper and lower surfaces of the dielectric substrate 1, Figure 3 , wherein the gray part is a component provided on the lower surface of the dielectric substrate 1, and the black part is a component provided on the upper surface of the dielectric substrate 1;
[0022] Figure 4 This is a parameter comparison diagram of the common electric dipole Yagi and the improved electric dipole Yagi antenna S11 in the first embodiment of the present utility model;
[0023] Figure 5 The E-plane radiation pattern of the electric dipole Yagi antenna in the prior art;
[0024] Figure 6 This is the E-plane radiation pattern of the electric dipole Yagi antenna according to the first embodiment of the utility model.
[0025] Explanation of the accompanying drawings: 1-dielectric substrate; 2-active oscillator unit; 3-active oscillator arc parasitic unit; 4-coaxial feeder; 5-reflector unit; 6-reflector arc parasitic unit, 7-director unit, 8-director arc parasitic unit. DETAILED DESCRIPTION
[0026] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.
[0027] 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 them. 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.
[0028] It should be noted that if the embodiments of the present invention involve directional indications such as up, down, left, right, front, back, etc., the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.
[0029] Embodiment 1:
[0030] Please refer to Figures 1 to 6 , Embodiment 1 of the present utility model is: Figure 2 As shown, a reduced-size planar arc electric dipole Yagi antenna comprises a director unit 7, an active dipole unit 2, an active dipole arc parasitic unit 3, a coaxial feeder 4, a reflector unit 5, a reflector arc parasitic unit 6, a director arc parasitic unit 8 and a dielectric substrate 1; the active dipole unit is a T-type dipole, and the left and right active dipoles are respectively located on the lower and upper surfaces of the dielectric substrate, and the T-type dipoles are symmetrically distributed along the feeder; the director unit, the reflector unit and the active dipole unit all include arc parasitic units; specifically:
[0031] The upper surface of the dielectric substrate 1 includes the right radiator, the director unit 7 and the director arc parasitic unit 8 in the active oscillator unit 2; the left radiator, the reflector unit 5 and the reflector arc parasitic unit 6 of the active oscillator unit 2 are arranged on the lower surface of the dielectric substrate 1, the active oscillator unit 2 is symmetrical about the coaxial feeder 4, the director arc parasitic units 8 are arranged at both ends of the director unit 7, the right radiator and the left radiator in the active oscillator unit 2 are also provided with active oscillator arc parasitic units 3 at both ends, the upper and lower ends of the coaxial feeder 4 are respectively connected to the active oscillator unit 2 and the reflector unit 5, and the reflector arc parasitic units 6 are arranged at both ends of the reflector unit 5.
[0032] Furthermore, the director arc parasitic unit 8, the active vibrator arc parasitic unit 3, and the reflector arc parasitic unit 6; the active vibrator arc parasitic unit 3 and the reflector arc parasitic unit 6 have the same structure.
[0033] The reflector arc parasitic units 6 provided at both ends of the reflector unit 5 are combined into a hollow ring structure with an outer radius of 5.5 mm and an inner radius of 4.5 mm, and the space between the outer radius and the inner radius is solid;
[0034] The director arc parasitic units 8 provided at both ends of the director unit 7 are combined into a hollow ring structure with an outer radius of 4.5 mm and an inner radius of 3.5 mm, and the space between the outer radius and the inner radius is solid.
[0035] Furthermore, the length of the active vibrator unit 2 is greater than the length of the director unit 7 and shorter than the length of the reflector unit 5 .
[0036] Furthermore, the dielectric substrate 1 is made of FR4 material with a dielectric constant of 4.4 and a loss tangent of 0.02.
[0037] Furthermore, the coaxial feed line 4 feeds the active oscillator unit 2 and adjusts impedance matching, and the material is copper.
[0038] Furthermore, the active oscillator unit 2 adopts a radiator T-type dipole structure.
[0039] Furthermore, the combination of the director arc parasitic unit 8 and the director unit 7, the combination of the reflector arc parasitic unit 6 and the reflector unit 5, and the combination of the active vibrator arc parasitic unit 3 and the active vibrator unit 2 on the dielectric substrate 1 allows the radiator T-type dipole structure adopted by the active vibrator unit 2 to emit an electromagnetic field to form directional radiation.
[0040] Furthermore, the active vibrator unit 2 , the director unit 7 , the reflector unit 5 , the director arc parasitic unit 8 , the reflector arc parasitic unit 6 , and the active vibrator arc parasitic unit 3 are all made of copper.
[0041] Furthermore, the sizes of the director unit 7, the active vibrator unit 2, and the reflector unit 5 are 20 mm, 36 mm, and 52 mm, respectively.
[0042] In order to illustrate the advantages of the electric dipole Yagi antenna compared to the ordinary electric dipole Yagi antenna, the inventor controlled the variables and conducted a gain experimental test.
[0043] Control group (ordinary electric dipole Yagi antenna): has 1 parasitic antenna unit, the structure is as follows Figure 1 shown.
[0044] Experimental group (the reduced-size planar arc electric dipole Yagi antenna of the utility model, i.e., arc microstrip Yagi antenna): structure as Figure 2 shown.
[0045] Figure 4The S11 parameter results of the common electric dipole Yagi antenna and the utility model antenna are compared. Figure 4 It can be seen that, under the premise of reducing the overall volume of the electric dipole antenna, the bandwidth of the arc-shaped electric dipole Yagi antenna disclosed in the first embodiment is widened, and the gain substrate remains unchanged. In the ordinary electric dipole Yagi antenna, the dimensions of the director unit 7, the active vibrator unit 2, and the reflector unit 5 are 40mm, 50mm, and 60mm respectively; after adding the arc parasitic unit, the dimensions of the director unit 7, the active vibrator unit 2, and the reflector unit 5 of the utility model antenna are 20mm, 36mm, and 52mm respectively; after adding the arc parasitic unit, compared with the ordinary Yagi antenna, the length reduction of its components: the director unit 7, the active vibrator unit 2, and the reflector unit 5 reaches 50%, 28%, and 13% respectively.
[0046] Figure 5 is the E-plane radiation pattern of the electric dipole Yagi antenna in the prior art, Figure 6 The E-plane radiation pattern of the electric dipole Yagi antenna of the first embodiment of the utility model; Figure 5-Figure 6 It can be seen from the figure that the utility model has a higher front-to-back ratio, broadband and stable gain. The utility model adopts a microstrip planar structure and can form a directional radiation pattern.
[0047] The above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. The present invention is described in detail with reference to the preferred embodiments. A person skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, and should be included in the scope of the claims of the utility model.
Claims
1. A reduced-size planar arc electric dipole Yagi antenna, characterized in that: It comprises a director unit (7), an active vibrator unit (2), an active vibrator circular arc parasitic unit (3), a coaxial feeder (4), a reflector unit (5), a reflector circular arc parasitic unit (6), a director circular arc parasitic unit (8) and a dielectric substrate (1); The upper surface of the dielectric substrate (1) comprises a right radiator, a director unit (7) and a director arc parasitic unit (8) in the active oscillator unit (2); the lower surface of the dielectric substrate (1) is provided with a left radiator, a reflector unit (5) and a reflector arc parasitic unit (6) of the active oscillator unit (2); the active oscillator unit (2) is symmetrical with respect to the coaxial feeder (4); the two ends of the director unit (7) are provided with director arc parasitic units (8); the two ends of the right radiator and the left radiator in the active oscillator unit (2) are also provided with active oscillator arc parasitic units (3); the upper and lower ends of the coaxial feeder (4) are respectively connected to the active oscillator unit (2) and the reflector unit (5); and the two ends of the reflector unit (5) are provided with reflector arc parasitic units (6).
2. The reduced-size planar arc electric dipole Yagi antenna according to claim 1, characterized in that: The director arc parasitic unit (8), the active vibrator arc parasitic unit (3), and the reflector arc parasitic unit (6); the active vibrator arc parasitic unit (3) and the reflector arc parasitic unit (6) have the same structure. The reflector arc parasitic units (6) provided at both ends of the reflector unit (5) are combined into a hollow ring structure with an outer radius of 5.5 mm and an inner radius of 4.5 mm, and the space between the outer radius and the inner radius is solid; The director arc parasitic units (8) provided at both ends of the director unit (7) are combined into a hollow ring structure with an outer radius of 4.5 mm and an inner radius of 3.5 mm, and the space between the outer radius and the inner radius is solid.
3. The reduced-size planar arc electric dipole Yagi antenna according to claim 1, characterized in that: The length of the active vibrator unit (2) is greater than the length of the director unit (7) and shorter than the length of the reflector unit (5).
4. The reduced-size planar arc electric dipole Yagi antenna according to claim 1, characterized in that: The dielectric substrate (1) is made of an FR4 plate material with a dielectric constant of 4.4 and a loss tangent of 0.
02.
5. The reduced-size planar arc electric dipole Yagi antenna according to claim 1, characterized in that: The coaxial feed line (4) feeds the active oscillator unit (2) and adjusts impedance matching, and is made of copper.
6. The reduced-size planar arc electric dipole Yagi antenna according to claim 1, characterized in that: The active oscillator unit (2) adopts a radiator T-type dipole structure.
7. The reduced-size planar arc electric dipole Yagi antenna according to claim 1, characterized in that: The combination of the director arc parasitic unit (8) and the director unit (7), the combination of the reflector arc parasitic unit (6) and the reflector unit (5), and the combination of the active vibrator arc parasitic unit (3) and the active vibrator unit (2) on the dielectric substrate (1) enables the radiator T-type dipole structure used in the active vibrator unit (2) to emit an electromagnetic field to form directional radiation.
8. The reduced-size planar arc electric dipole Yagi antenna according to claim 1, characterized in that: The active vibrator unit (2), the director unit (7), the reflector unit (5), the director arc parasitic unit (8), the reflector arc parasitic unit (6), and the active vibrator arc parasitic unit (3) are all made of copper.
9. The reduced-size planar arc electric dipole Yagi antenna according to claim 1, characterized in that: The sizes of the director unit (7), the active vibrator unit (2) and the reflector unit (5) are 20 mm, 36 mm and 52 mm respectively.