CN115207644A - Broadband omnidirectional high-gain linear array antenna - Google Patents
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- H—ELECTRICITY
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- H01Q—ANTENNAS, i.e. RADIO AERIALS
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- H—ELECTRICITY
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- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
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Abstract
The invention discloses a broadband omnidirectional high-gain line array antenna, which mainly solves the problems of beam inclination, narrower bandwidth, poorer omni-directionality and larger volume in the prior art, and comprises a line array (1), a signal input end (2) and a dielectric plate (3), wherein the line array comprises an upper line array (11) and a lower line array (12) which are respectively printed on the upper surface and the lower surface of the dielectric plate (3), the upper line array comprises a left upper array element, a middle upper array element and a right upper array element, and each array element is a T-shaped printed metal sheet; the offline array comprises a cross-shaped left lower array element and an H-shaped right lower array element which are both printed metal sheets, the transverse edges of the array elements are parallel to the transmission lines and are connected through vertical edges, the vertical edge positions of the upper surface array element and the lower surface array element are overlapped, and the directions of the transverse edges are opposite; the signal input end is positioned at the right center of the linear array antenna and is connected with the adjacent upper and lower surface array elements. The invention has stable wave beam, wide frequency band, good omni-directionality, small volume and easy carrying, and can be used for wireless communication.
Description
Technical Field
The invention belongs to the technical field of antennas, and particularly relates to a linear array antenna which can be used for wireless communication.
Technical Field
The performance of the antenna, which is a key component for communicating signals by the communication device, often depends on the communication environment, and the design requirements of the antenna for different wireless communication environments are different. The antennas can be classified into a directional antenna and an omni-directional antenna according to the uniformity of radiation energy, i.e., directivity. Directional antennas are often used in single-point to limited location environments, such as highway or offshore communications, where the directional antenna is required to generate one or more main beams at a known, specific orientation, while forming nulls in other directions to attenuate radiation or reception in that direction. Because directional antennas can radiate all the energy in a specific, specific direction, they are characterized by a high gain, a long communication distance and are not easily monitored. An omnidirectional antenna is often selected in single-point to arbitrary uncertain multipoint communication, because the omnidirectional antenna can radiate electromagnetic waves in an azimuth plane, and therefore omnidirectional coverage of signals is achieved.
The omnidirectional antenna is an antenna which realizes 360-degree uniform radiation in a horizontal plane and has beam widths forming different angles with the horizontal plane in a vertical plane. The signal transmitted by the omnidirectional antenna can be received by a receiving end at any direction of the horizontal plane, and simultaneously, the signal in each direction of the horizontal plane can be received. Omni-directional antennas are commonly used in communication systems for point-to-multipoint communication systems with wide coverage, such as broadcast television. The omnidirectional antenna has the characteristics of lower gain, short communication distance and wide coverage range, and can be applied to special communication environments. Omni-directional antennas are more suitable than directional antennas in a scene where electromagnetic wave signals are required to cover a wide range, such as broadcasting, television, and mobile communication base stations. In short-distance no-specific-target communication, such as indoor WLAN, intercom system and other communication devices, the omnidirectional antenna has the advantage of being more reliable. In addition, the omnidirectional antenna is also widely applied to projects such as roadbed navigation, radio frequency identification, radar sensor network, channel detection and the like. Compared with a mechanical scanning antenna and a phased array antenna, the omnidirectional antenna can naturally realize 360-degree omnidirectional coverage, and has the advantages of simple structure and low manufacturing cost.
With the development of the times and the change of science and technology, the development of wireless communication technology deeply changes the work and life of people and urges the people to pursue higher-performance and faster mobile communication, interconnection and information acquisition technologies. If the information amount in the fourth generation mobile communication is increased sharply, it is required to transmit high-quality pictures, audio and video in addition to data transmission in the aspect of language and text, and the fifth generation is required to have simultaneous access of a large number of terminals, ultra-fast network connection, stable and uninterrupted communication, and timely and high-quality multimedia experience, and to achieve the purpose, it is required to greatly improve the information transmission rate, the signal spectrum utilization rate and the network capacity. This forces wireless communication systems to develop toward the goal of broadband and full intelligence. Particularly, based on the requirement of secret communication, the frequency hopping spread spectrum technology is widely adopted, and meanwhile, the rapid wireless transmission of information of large-scale digital communication data is ensured under the requirement of high precision, which inevitably requires that the bandwidth of an antenna in a system is also rapidly improved. In addition, in order to meet the requirement of electromagnetic compatibility of each device in a complex electromagnetic environment, mutual coupling and interference among antennas in a plurality of systems on radio equipment are required to be reduced, and a method of adapting to a plurality of different working environments and covering all communication frequency bands by using one broadband or ultra-wideband antenna is feasible, so that the number of antennas in the working environment can be greatly reduced, the interference among the systems is reduced, and the purposes of reducing cost and optimizing system performance are achieved. Therefore, the research and development of the broadband omni-directional antenna is a significant research topic in modern wireless communication systems, both civil and military.
The existing omnidirectional antenna array comprises a line array, a surface array, a slot array and a combined antenna array. Wherein:
the line array, as shown in fig. 1, is formed by arranging the minimum element elements constituting the antenna array on a straight line, most of the line array feeding modes are series feeding, that is, input from one port of the antenna, although the vertical polarization antenna with good omni-directionality can be obtained by using the line array antenna with series feeding, because the path lengths from the input port of the series feeding antenna array to each dominating element are different, the phases of the antenna array when it arrives are also different when the frequency changes, so that the beam of the antenna array is easy to decline or incline, and the bandwidth is relatively narrow.
The planar array is formed by arranging a plurality of linear array antennas at a certain plane at set intervals, the planar array adopts a parallel feeding mode, and the parallel feeding antenna array mode avoids the inclination of a directional diagram, but the parallel feeding structure is complex in design, occupies a larger space, and is more complex for large-scale array design with stronger performance.
The slot array is formed by special processing, namely a plurality of slot array elements are manufactured by slotting a conductor surface and then are arranged to form the slot array.
The combined antenna array is formed by a plurality of linear array antennas through power divider feeding, although the production steps can be simplified by dividing the antenna array into a plurality of linear arrays, and the feeding circuit structure can be simplified by using the power divider feeding, the combined antenna array is usually in a three-dimensional shape, has larger weight and volume, is complicated in debugging and assembling process, is not convenient to carry, and is not suitable for places where the antennas need to be temporarily arranged.
Disclosure of Invention
The invention aims to provide a broadband omnidirectional high-gain linear array antenna, which aims to solve the technical problems of beam inclination, narrower bandwidth, larger volume and higher cost of the conventional antenna array and meet the requirement of broadband omnidirectional communication.
In order to achieve the above object, the broadband omnidirectional high-gain line array antenna of the present invention includes a line array 1, a signal input end 2 and a dielectric plate 3, and is characterized in that:
the line array 1 is divided into an upper line array 11 and a lower line array 12 which are respectively printed on the front and back surfaces of the dielectric plate 3, and the signal input end 2 is positioned at the positive center position of the upper line array 11 and the lower line array 12;
the upper line array 11 is composed of 1 × 8 upper array elements which are arranged in parallel, and comprises 1 × 4 left upper array elements 111,1 × 2 middle upper array elements 112 and 2 right upper array elements 113 from left to right, wherein each array element is a T-shaped printed metal sheet; the direction of the transverse edge 1111 of each upper left array element 111 is the same as that of the transmission line 1112 thereof, and the transverse edges are connected through a vertical edge 1113; the direction of the transverse edge 1121 of each upper middle array element 112 is opposite to that of the transmission line 1122 thereof, and the transverse edges are communicated with the vertical edges 1123; each right array upper element 113 has only a vertical edge 1131 vertically connected to a transmission line 1132;
the offline array 12 consists of 8 lower array elements arranged in parallel, and comprises 6 left lower array elements 121 and 2 right lower array elements 122 from left to right; each lower left array element 121 is a cross-shaped printed metal sheet, and a transverse edge 1211 of the cross-shaped printed metal sheet is parallel to the transmission line 1212 and forms a right-angle shape with a vertical edge 1213; each right array lower element 122 is an "H" shaped printed metal sheet with its transverse edge 1221 parallel to its transmission line 1222 and two symmetrical right-angle shapes with its vertical edge 1223.
Further, the signal input end 2 is located at a circular groove in the center of the dielectric slab 3 and is connected with the transmission lines of the array elements of the adjacent upper line array and the lower line array.
Further, the transverse side 1111 of the upper left array element 111 and the transverse side 1211 of the lower left array element 121 at the corresponding position have the same direction, the length is 9.7 mm-9.8 mm, and the width is 1.25 mm-1.35 mm;
the length of the vertical edge 1113 of the upper left array element 111 is 11.7 mm-11.9 mm, the length of the vertical edge 1213 of the lower left array element 121 at the corresponding position is 8.9 mm-9.1 mm, the two vertical edges are overlapped, and the width of the two vertical edges is 1.45 mm-1.55 mm.
Furthermore, the transverse edge 1121 of the upper middle array element 112 is opposite to the transverse edge 1211 of the lower left array element 121 at the corresponding position, the length is 9.7 mm-9.8 mm, and the width is 1.25 mm-1.35 mm;
the length of the vertical edge 1123 of the middle upper array element 112 is 11.7 mm-11.9 mm, the length of the vertical edge 1213 of the left lower array element 121 at the corresponding position is 8.9 mm-9.1 mm, the two vertical edges are overlapped, and the width of the two vertical edges is 1.4 mm-1.5 mm.
Further, the length of the transverse edge 1221 of the lower right array element 122 is 20.9mm to 21.1mm, and the width is 1.25mm to 1.35mm.
The length of the vertical edge 1131 of the upper right array element 113 is 11.7 mm-11.9 mm, the length of the vertical edge 1223 of the lower right array element 122 at the corresponding position is 8.9 mm-9.1 mm, the two vertical edges are overlapped, and the widths of the two vertical edges are both 1.4 mm-1.5 mm.
Further, the transmission line 1112 of the upper left array element 111, the transmission line 1122 of the upper middle array element 112, and the transmission line 1132 of the upper right array element 113 are all in the shape of a long and thin triangle, and have lengths of 33mm to 34mm, the end of the transmission line connected to the vertical edge is wide, the end far away from the vertical edge is narrow, the width of the end near the vertical edge is 1.95mm to 2.05mm, and the width of the end far away from the vertical edge is far smaller than the width of the end near the vertical edge;
the width of the transmission line 1212 of the left lower array element 121 and the length of the transmission line 1222 of the right lower array element 122 are both 9.95 mm-10.5 mm, and the lengths are both 33 mm-34 mm.
Further, the dielectric plate 3 is made of an insulating material having a dielectric constant of 3.45F/m to 3.65F/m, a loss tangent of 0.0025 to 0.003, and an overall size of 315mm × 40mm × 0.8mm.
Further, the diameter of the circular groove at the center of the dielectric slab is 0.9 mm-1.1 mm.
Compared with the prior art, the invention has the following advantages:
1. the signal input end is arranged at the center of the line array, so that the line array is fed in a parallel mode, the feeding structure is simple, the beam of the line array is horizontal and stable, the line array is not prone to declining or inclining, the omni-directionality is good, and the bandwidth is wide.
2. According to the invention, different array elements with different numbers are linearly arranged to form the upper line array and the lower line array, and are respectively printed on the upper surface and the lower surface of the dielectric plate, so that the line array antenna has the advantages of smaller thickness, lighter weight, smaller occupied space of the whole structure, portability, lower requirement on processing precision and lower production cost.
Drawings
Figure 1 is a schematic diagram of a conventional line array antenna;
FIG. 2 is an exploded view of the overall structure of the present invention;
FIG. 3 is a schematic view of the overall structure of the present invention;
FIG. 4 is a schematic diagram of an upper line array structure in the present invention;
FIG. 5 is a schematic diagram of the structure of the upper left array element, the upper middle array element and the upper right array element in the present invention;
FIG. 6 is a schematic view of a downline array configuration of the present invention;
FIG. 7 is a schematic diagram of the structure of the lower left array element and the lower right array element in the present invention;
FIG. 8 is a simulation plot of S11 reflection coefficient for the line array antenna of the present invention;
figure 9 is a simulation of antenna orientation for the line array antenna of the present invention;
figure 10 is a simulation of the 3D antenna orientation for the inventive line array antenna.
Detailed Description
The embodiments and effects of the present invention will be described in further detail below with reference to the accompanying drawings, in which the present invention provides the following three embodiments:
example 1
Referring to fig. 2 and 3, the present example includes a line array 1, a signal input terminal 2 and a dielectric slab 3, the line array 1 is divided into an upper line array 11 and a lower line array 12, wherein the upper line array 11 is printed on the front surface of the dielectric slab 3, the lower line array 12 is printed on the back surface of the dielectric slab 3, and the signal input terminal 2 is located at the right center position of the upper line array 11 and the lower line array 12;
the dielectric plate 3 is made of Rogers4003, and is required to have a dielectric constant of 3.45F/m to 3.65F/m and a loss tangent of 0.0025 to 0.003, but the dielectric constant is 3.55F/m, the loss tangent is 0.0027, and the overall dimension is 315mm × 40mm × 0.8mm.
Referring to fig. 4 and 5, the upper line array 11 includes three array elements, i.e., an upper left array element 111, an upper middle array element 112, and an upper right array element 113, and the number ratio of the three array elements is 2M: m: m, which are arranged in a line, M ≧ 1, M =2 in this example. This upper left array element 111 and well upper array element 112 all are equipped with horizontal limit, perpendicular limit and transmission line, and this upper right array element 113 only has perpendicular limit and transmission line. The three array elements are all T-shaped metal sheets, the direction of the transverse edge 1111 of each upper left array element 111 is the same as that of the transmission line 1112 thereof, and the three array elements are vertically connected through a vertical edge 1113; the direction of the transverse edge 1121 of each upper middle array element 112 is opposite to that of the transmission line 1122 thereof, and the transverse edges are vertically communicated through a vertical edge 1123; the vertical edge 1131 of each right array upper array element 113 is vertically connected to a transmission line 1132. This transmission line 1112 of upper left array element 111, transmission line 1122 of middle upper array element 112 and transmission line 1132 of upper right array element 113, the shape is elongated triangle, and the one end width of transmission line is greater than the width of the other end promptly, and links to each other with the one end and the perpendicular limit of transmission line width, and the width that the transmission line of three kinds of array elements connects perpendicular limit one end promptly is 2mm, and length is 33.5mm.
Referring to fig. 6 and 7, the lower line array 12 includes two array elements, i.e., a lower left array element 121 and a lower right array element 122, and the ratio of the number of the two array elements is 3M: m, which are arranged in a line, M ≧ 1, M =2 in this example. The left lower array element 121 and the right lower array element 122 are provided with a transverse edge, a vertical edge and a transmission line. Each lower left array element 121 is a cross-shaped metal sheet, and a transverse edge 1211 of the cross-shaped metal sheet is parallel to the transmission line 1212 and forms a right-angle shape with a vertical edge 1213; each lower right array element 122 is an "H" shaped printed metal sheet with a transverse edge 1221 parallel to the transmission line 1222 and two symmetrical right-angled shapes with a vertical edge 1223. The transmission line 1212 of the left lower array element and the transmission line 1222 of the right lower array element are the same in size, that is, the transmission line widths of the two array elements are both 10mm, and the lengths are both 33.5mm.
The left upper array element 111 corresponds to the left lower array element 121 in position, and the transverse edge 1111 of the left upper array element 111 is the same as the transverse edge 1211 of the left lower array element 121 in direction and size, that is, the transverse edges of the left upper array element and the left lower array element are both 9.75mm in length and 1.3mm in width; the vertical edge 1113 of the upper left array element 111 coincides with the vertical edge 1213 of the lower left array element 121 in position, and the widths are the same, and the vertical edge lengths are different, i.e., the length of the vertical edge 1113 of the upper left array element 111 is 11.8mm, the length of the vertical edge 1213 of the lower left array element 121 is 9mm, and the widths of the two vertical edges are both 1.5mm.
The middle upper array element 112 corresponds to the left lower array element 121 in position, and the transverse sides 1121 of the middle upper array element 112 and the transverse sides 1211 of the left lower array element 121 are opposite in direction and are the same in size, that is, the transverse sides of the two array elements are both 9.75mm in length and 1.3mm in width; the vertical edge 1123 of the middle-upper array element 112 coincides with the vertical edge 1213 of the left-lower array element 121 in position, the widths are the same, the lengths of the vertical edges are different, namely, the length of the vertical edge 1123 of the middle-upper array element 112 is 11.8mm, the length of the vertical edge 1213 of the left-lower array element 121 is 9mm, and the widths of the two vertical edges are both 1.5mm.
The right upper array element 113 corresponds to the right lower array element 122 in position, and the vertical edge 1131 of the right upper array element 113 coincides with the vertical edge 1223 of the right lower array element 122 in position, and has the same width and different lengths, that is, the length of the vertical edge 1131 of the right upper array element 113 is 11.8mm, the length of the vertical edge 1223 of the right lower array element 122 is 9mm, and the widths of the two vertical edges are both 1.5mm; the transverse edge 1221 of the lower right array element 122 has a length of 21mm and a width of 1.3mm.
The diameter of the circular groove at the center of the dielectric slab is 1mm.
Example 2
The structure of this embodiment is the same as that of embodiment 1, and the material types and antenna parameters are different, which is described in detail as follows:
the dielectric plate 3 has a dielectric constant of 3.45F/m and a loss tangent of 0.0025.
The width of the transmission line 1112 of the upper left array element, the width of the transmission line 1122 of the upper middle array element and the width of one end of the transmission line 1132 of the upper right array element, which is connected with the vertical edge, are both 1.95mm, and the lengths are both 33mm.
The width of the transmission line 1212 of the left lower array element and the length of the transmission line 1222 of the right lower array element are both 9.95mm and 33mm.
The length of the transverse edge 1111 of the left upper array element 111 and the transverse edge 1211 of the left lower array element 121 are both 9.7mm, and the width of the transverse edge is both 1.25mm; the length of the vertical edge 1113 of the left upper array element 111 is 11.7mm, the length of the vertical edge 1213 of the left lower array element 121 is 8.9mm, and the widths of the two vertical edges are both 1.45mm.
The length of the transverse edge 1121 of the upper middle array element 112 and the transverse edge 1211 of the lower left array element 121 are both 9.7mm, and the width of the transverse edge is both 1.25mm; the length of the vertical edge 1123 of the middle upper array element 112 is 11.7mm, the length of the vertical edge 1213 of the left lower array element 121 is 8.9mm, and the widths of the two vertical edges are both 1.45mm.
The length of the vertical edge 1131 of the upper right array element 113 is 11.7mm, the length of the vertical edge 1223 of the lower right array element 122 is 8.9mm, and the widths of the two vertical edges are both 1.45mm; the transverse edge 1221 of the lower right array element 122 has a length of 20.5mm and a width of 1.45mm.
The diameter of the circular groove at the center of the dielectric slab is 0.9mm.
Example 3
The structure of this embodiment is the same as that of embodiment 1, and the material types and antenna parameters are different, which is described in detail as follows:
the dielectric plate 3 had a dielectric constant of 3.65F/m and a loss tangent of 0.003.
The width of the transmission line 1112 of the upper left array element, the width of the transmission line 1122 of the upper middle array element and the width of one end of the transmission line 1132 of the upper right array element, which is connected with the vertical edge, are both 2.05mm, and the lengths are both 34mm.
The width of the transmission line 1212 of the left lower array element and the length of the transmission line 1222 of the right lower array element are both 10.5mm, and the lengths are both 34mm.
The length of the transverse edge 1111 of the left upper array element 111 and the transverse edge 1211 of the left lower array element 121 are both 9.8mm, and the width of the transverse edge is both 1.35mm; the length of the vertical edge 1113 of the left upper array element 111 is 11.9mm, the length of the vertical edge 1213 of the left lower array element 121 is 9.1mm, and the widths of the two vertical edges are both 1.55mm.
The length of the transverse edge 1121 of the upper middle array element 112 and the transverse edge 1211 of the lower left array element 121 are both 9.8mm, and the width of the transverse edge is both 1.35mm; the length of the vertical edge 1123 of the middle upper array element 112 is 11.9mm, the length of the vertical edge 1213 of the left lower array element 121 is 9.1mm, and the widths of the two vertical edges are both 1.55mm.
The length of the vertical edge 1131 of the upper right array element 113 is 11.9mm, the length of the vertical edge 1223 of the lower right array element 122 is 9.1mm, and the widths of the two vertical edges are both 1.55mm; the transverse edge 1221 of the lower right array element 122 has a length of 21.1mm and a width of 1.55mm.
The diameter of the circular groove at the center of the dielectric slab is 1.1mm.
The working principle of the above example is as follows:
the surface current distribution of the symmetrical oscillator formed by the transverse edges of the corresponding array elements printed on the upper surface and the lower surface of the dielectric plate can be regarded as approximate sine distribution, and if the symmetrical oscillator is placed on a Z axis, the current distribution on the symmetrical oscillator can be obtained by analyzing the Z axis:
I＝I m sinβ(L-|z|) 0<z<L
in the formula I m Is the antinode current, beta is the propagation constant, and L is the length of one arm of the oscillator, i.e., the transverse side of the array element.
The linear array antenna can excite high-frequency current at two arms after being fed by the signal input end, the high-frequency current can excite a radiation field in each direction of the space, if the position of the linear array antenna is set as a coordinate origin, the radiation field distribution in the space is formed, and the distribution is expressed as:
wherein r is the distance from a certain point in space to an original point, theta angle is the included angle between a connecting line of the certain point and the original point in space and a Z axis,
is the angle between the projection of a certain point in space and the connecting line of the original point on the XY plane and the X axis, and k is the Boltzmann constant.
Electric field is applied
Divided by its maximum value E Max Obtaining a normalized directional diagram function:
according to normalized directional diagram function
And maximum value of electric field intensity E Max The magnitude E of the electric field intensity in each direction can be calculated.
From the above equation, it can be seen that the normalized directional diagram function
Component of spherical coordinates
Independent, i.e. functions of points of equal distance in the same plane
The values of the two are the same, the electric field intensity is the same, the electric field intensity changes along with the pitching surface angle theta, namely, the electric field intensity is only related to the included angle between the symmetrical oscillator and the horizontal plane
Is represented by a horizontal plane, which
The constant is the electric field intensity of each azimuth with the same distance of the off-line array antenna on the horizontal plane, namely the oscillator radiates omnidirectionally on the horizontal plane.
The technical effects of the invention are further explained by combining simulation experiments as follows:
1. simulation conditions
The commercial simulation software used for the simulation was HFSS _15.0,
2. simulation content:
As can be seen from FIG. 8, S11 values of the linear array antenna are all less than-10 dB in the frequency range of 4.7GHz to 5.6GHz, and the peak value is-21 dB at 4.95GHz, so that the requirement of modern communication bandwidth is met.
As can be seen from fig. 9 (a), the horizontal lobe diagram shows that the line array antenna has omni-directionality, and the maximum gain of the antenna array can reach 8dB;
as can be seen from fig. 9 (b), the vertical lobe diagram shows that the array antenna has the best omni-directionality in the horizontal direction, the highest gain, and the radiation capability in the space obliquely above or below the array antenna is also stronger.
As can be seen from fig. 10 (a), the horizontal 3D radiation pattern shows that the antenna array has omni-directionality;
as can be seen from fig. 10 (b), the vertical 3D radiation pattern shows that the antenna array has the best omni-directionality in the horizontal direction, the highest gain, and the radiation capability of the space above or below the antenna array is stronger;
in conclusion, the antenna array has the excellent properties of omnidirectional and high gain, and meets the requirements of modern communication.
The foregoing description is only three specific examples of the present invention and is not intended to limit the invention, so that it will be apparent to those skilled in the art that various changes and modifications in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (8)
1. A broadband omnidirectional high-gain linear array antenna comprises a linear array (1), a signal input end (2) and a dielectric plate (3), and is characterized in that:
the line array (1) is divided into an upper line array (11) and a lower line array (12) which are respectively printed on the front side and the back side of the dielectric plate (3), and the signal input end (2) is positioned in the positive center of the upper line array (11) and the lower line array (12);
the upper line array (11) consists of 1 × 8 upper array elements which are arranged in parallel, and comprises 1 × 4 left upper array elements (111), 1 × 2 middle upper array elements (112) and 2 right upper array elements (113) from left to right, wherein each array element is a T-shaped printing metal sheet; the direction of the transverse edge (1111) of each upper left array element (111) is the same as that of the transmission line (1112) thereof, and the transverse edges are connected through a vertical edge (1113); the direction of the transverse edge (1121) of each middle upper array element (112) is opposite to that of the transmission line (1122) of the middle upper array element, and the transverse edges are connected through a vertical edge (1123); each right array upper element (113) is only vertically connected with a vertical edge (1131) and a transmission line (1132);
the offline array (12) consists of 8 lower array elements which are arranged in parallel, and comprises 6 left lower array elements (121) and 2 right lower array elements (122) from left to right; each lower left array element (121) is a cross-shaped printed metal sheet, the transverse edge (1211) of the cross-shaped printed metal sheet is parallel to the transmission line (1212), and the transverse edge and the vertical edge (1213) form a right-angle shape; each right matrix lower element (122) is an H-shaped printed metal sheet, the transverse edge (1221) of which is parallel to the transmission line (1222) and forms two symmetrical right-angle shapes with the vertical edge (1223).
2. The line array antenna of claim 1, wherein the signal input (2) is located in a circular slot in the centre of the dielectric slab (3) which connects to the transmission lines of the elements of the adjacent upper and lower line arrays.
3. The line array antenna of claim 1, wherein:
the transverse edge (1111) of the upper left array element (111) has the same direction as the transverse edge (1211) of the lower left array element (121) at the corresponding position, the length is 9.7 mm-9.8 mm, and the width is 1.25 mm-1.35 mm;
the length of the vertical edge (1113) of the upper left array element (111) is 11.7-11.9 mm, the length of the vertical edge (1213) of the lower left array element (121) at the corresponding position is 8.9-9.1 mm, the two vertical edges are overlapped, and the widths of the two vertical edges are 1.45-1.55 mm.
4. The line array antenna of claim 1, wherein:
the transverse edge (1121) of the middle upper array element (112) is opposite to the transverse edge (1211) of the left lower array element (121) at the corresponding position in direction, the length is 9.7 mm-9.8 mm, and the width is 1.25 mm-1.35 mm;
the length of a vertical edge (1123) of the middle upper array element (112) is 11.7-11.9 mm, the length of a vertical edge (1213) of the left lower array element (121) at the corresponding position is 8.9-9.1 mm, the two vertical edges are overlapped, and the widths of the two vertical edges are 1.45-1.55 mm.
5. The line array antenna of claim 1, wherein:
the length of the transverse edge (1221) of the lower right array element (122) is 20.9-21.1 mm, and the width is 1.25-1.35 mm;
the length of a vertical edge (1131) of the upper right array element (113) is 11.7-11.9 mm, the length of a vertical edge (1223) of the lower right array element (122) at the corresponding position is 8.9-9.1 mm, the two vertical edges are overlapped, and the widths of the two vertical edges are 1.45-1.55 mm.
6. The line array antenna of claim 1, wherein:
the transmission line (1112) of the upper left array element (111), the transmission line (1122) of the upper middle array element (112) and the transmission line (1132) of the upper right array element (113) are all in the shape of a long and thin triangle, the lengths of the transmission lines are both 33 mm-34 mm, one end of the transmission line, which is connected with the vertical edge, is wide, the end, which is far away from the vertical edge, is narrow, the width of one end, which is close to the vertical edge, is 1.95 mm-2.05 mm, and the width of one end, which is far away from the vertical edge, is far smaller than the width of one end, which is close to the vertical edge;
the width of the transmission line (1212) of the left lower array element (121) and the width of the transmission line (1222) of the right lower array element (122) are both 9.95 mm-10.5 mm, and the length of the transmission line is both 33 mm-34 mm.
7. The line array antenna of claim 1, wherein the dielectric plate (3) is made of an insulating material having a dielectric constant of 3.45F/m to 3.65F/m, a loss tangent of 0.0025 to 0.003 and overall dimensions of 315mm x 40mm x 0.8mm.
8. The line array antenna of claim 2, wherein the circular slot at the center of the dielectric slab has a diameter of 0.9mm to 1.1mm.
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| CN202210730483.5A CN115207644A (en) | 2022-06-24 | 2022-06-24 | Broadband omnidirectional high-gain linear array antenna |
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| CN102195143A (en) * | 2011-03-10 | 2011-09-21 | 东南大学 | Broadband shunt-feed omnidirectional antenna array with inclination angle |
| US20140266953A1 (en) * | 2013-03-15 | 2014-09-18 | Sierra Wireless, Inc. | Antenna having split directors and antenna array comprising same |
| CN110556633A (en) * | 2019-07-26 | 2019-12-10 | 西安电子科技大学 | Broadband vertical polarization omnidirectional array antenna with adjustable unit number |
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