CN115411513B - Large-frequency-ratio dual-function radio frequency equipment and wireless transmission system - Google Patents
Large-frequency-ratio dual-function radio frequency equipment and wireless transmission system Download PDFInfo
- Publication number
- CN115411513B CN115411513B CN202210996241.0A CN202210996241A CN115411513B CN 115411513 B CN115411513 B CN 115411513B CN 202210996241 A CN202210996241 A CN 202210996241A CN 115411513 B CN115411513 B CN 115411513B
- Authority
- CN
- China
- Prior art keywords
- coplanar waveguide
- radio frequency
- frequency
- square dielectric
- dual function
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 11
- 239000000758 substrate Substances 0.000 claims abstract description 61
- 239000002184 metal Substances 0.000 claims abstract description 56
- 229910052751 metal Inorganic materials 0.000 claims abstract description 56
- 239000004020 conductor Substances 0.000 claims abstract description 34
- 230000009977 dual effect Effects 0.000 claims abstract description 29
- 230000008878 coupling Effects 0.000 claims abstract description 28
- 238000010168 coupling process Methods 0.000 claims abstract description 28
- 238000005859 coupling reaction Methods 0.000 claims abstract description 28
- 238000001914 filtration Methods 0.000 claims abstract description 10
- 230000005855 radiation Effects 0.000 description 19
- 230000010287 polarization Effects 0.000 description 14
- 238000004891 communication Methods 0.000 description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 8
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000010354 integration Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000005388 cross polarization Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000001259 photo etching Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000033772 system development Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Abstract
The invention discloses a large-frequency-ratio dual-function radio frequency device and a wireless transmission system, wherein the large-frequency-ratio dual-function radio frequency device comprises: the square dielectric substrate is provided with a first surface and a second surface which are oppositely arranged; the two T-shaped metal conductor planes are arranged on the first surface and correspond to the two side edges connected with the square dielectric substrate, the two T-shaped metal conductor planes are orthogonally distributed, a coplanar waveguide structure and a gap coupling structure are formed in the area of the two T-shaped metal conductor planes, and the coplanar waveguide structure and the gap coupling structure are mutually matched to form a millimeter wave antenna; the low-frequency filter is arranged on the second surface and is coupled and connected with the coplanar waveguide structure so as to realize low-frequency filtering; the two square dielectric polarizers are arranged at the same side as the second surface at intervals, and the orthographic projection of the two square dielectric polarizers and the plane of each T-shaped metal conductor are all arranged at 45 degrees. The invention realizes the dual functions of integrating the antenna and the filter in the same radio frequency equipment.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a high-frequency-ratio dual-function radio frequency device and a wireless transmission system.
Background
With further development of wireless communication technology, it has become a trend to design miniaturized, highly integrated base station systems. To achieve this, it is an efficient approach to integrate two or more radio frequency modules into the same device. Accordingly, radio frequency devices with dual or multiple functions are favored by more and more students.
The antenna and the filter are two indispensable components in the communication system. The antenna acts as a radiator, transmitting the digital signal of the system in the atmosphere in the form of electromagnetic wave propagation, or may receive a radio signal from a particular direction. The filter can effectively filter out signals of a particular frequency, transmitting useful signals to another port. The radio frequency equipment with the functions of the filter and the antenna can be applied to a reconfigurable network, and the functions of the radio frequency equipment can be switched according to the working requirements, so that the size and the cost of the system are reduced. The existing wireless communication system has the coexistence of signals in microwave and millimeter wave bands, and the radio frequency module with large frequency ratio can meet the communication requirement of the system and save more space than the traditional separate design method. In addition, since the dual circularly polarized antenna can increase the capacity of wireless communication, it is resistant to multipath interference, and it is not necessary to perform strict orientation between the transmitting antenna and the receiving antenna. Therefore, research into implementing dual circularly polarized radiation of antennas has important application and academic significance for applications of modern wireless communications.
In view of the foregoing, it is desirable to design a dual-function rf device with a large frequency ratio, so that a filter and a dual circularly polarized antenna are integrated in the same device at the same time, and spectrum resources of microwaves and millimeter waves are utilized together.
Disclosure of Invention
The invention mainly aims to provide a large-frequency-ratio dual-function radio frequency device and a wireless transmission system, and aims to integrate dual functions of an antenna and a filter in the same device.
To achieve the above object, the present invention provides a large-frequency-ratio dual-function radio frequency device, including:
the square dielectric substrate is provided with a first surface and a second surface which are oppositely arranged;
The two T-shaped metal conductor planes are arranged on the first surface and correspond to two side edges connected with the square dielectric substrate, the two T-shaped metal conductor planes are orthogonally distributed, a coplanar waveguide structure and a gap coupling structure are formed in the areas of the two T-shaped metal conductor planes, and the coplanar waveguide structure and the gap coupling structure are mutually matched to form a millimeter wave antenna;
The low-frequency filter is arranged on the second surface and is coupled with the coplanar waveguide structure so as to realize low-frequency filtering;
The two square dielectric polarizers are arranged at the same side of the second surface at intervals, and the orthographic projection of the two square dielectric polarizers and each T-shaped metal conductor plane are arranged at 45 degrees.
Optionally, each of the coplanar waveguide structures includes:
the port is arranged on the side edge of the square dielectric substrate;
A coplanar waveguide feeder, one end of which is electrically connected with the port, and the other end of which extends to one side deviating from the port;
The first coplanar waveguide floor and the second coplanar waveguide floor are electrically connected with the port, are respectively arranged on two sides of the coplanar waveguide feeder line, and form a first gap with the coplanar waveguide feeder line.
Optionally, each of the slot coupling structures includes:
And the second gap is formed at a public connection part among the first coplanar waveguide floor, the second coplanar waveguide floor and the coplanar waveguide feeder line.
Optionally, the low frequency filter includes:
The two coupling resonators are coupled and connected and are respectively arranged above the gap coupling structure.
Optionally, each square dielectric polarizer includes:
the medium sheets are arranged at intervals and are connected with one another through connecting pieces.
Optionally, the high frequency ratio dual function radio frequency device further includes:
metal reflecting plates arranged at intervals on the same side as the second surface
Optionally, the center operating frequency of the low-frequency filter is 5.8GHz, and the center operating frequency of the millimeter wave antenna is 42GHz.
Optionally, one end of each first support column is fixed on the square dielectric substrate, and the other end of each first support column is fixed on the metal reflecting plate.
Optionally, a plurality of second support columns, and two square dielectric polarizers are fixed on the square dielectric substrate through the second support columns.
The invention also provides a wireless transmission system which comprises the large-frequency-ratio dual-function radio frequency equipment.
The invention provides a large-frequency-ratio dual-functional radio frequency device with millimeter wave circular polarization antenna function and low-frequency filter function, which can excite a filter at the top of a medium substrate and also excite a slot coupling structure in the coplanar waveguide by arranging a coplanar waveguide structure at the bottom of the medium substrate, so that the filter can become a radiator of the antenna, namely energy is radiated from the slot coupling structure, and linear polarization waves radiated by the antenna are converted into circular polarization through two square medium polarizers. The present invention presents challenges that can address future communication system requirements for multi-band coexistence and device miniaturization. In addition, the radio frequency equipment with the dual functions of the antenna and the filter can be applied to a reconfigurable network, a feasible scheme is provided for improving the integration level of the system in the future, and a technical reserve is provided for more functional integrated wireless communication technology.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a large-frequency-ratio dual-function RF device according to an embodiment of the present invention;
FIG. 2 is a top view of one embodiment of a high frequency ratio dual function RF device of the present invention;
FIG. 3 is a side view of one embodiment of a high frequency ratio dual function RF device of the present invention;
FIG. 4 is a schematic diagram of an embodiment of the square dielectric substrate of FIG. 1;
FIG. 5 is a schematic diagram of another embodiment of the square dielectric substrate of FIG. 1;
FIGS. 6-7 are specific dimensional diagrams of a high frequency ratio dual function RF device of the present invention;
FIG. 8 is a graph showing the variation of S parameter and gain with frequency for a dual-function RF device with high frequency ratio according to the present invention;
FIG. 9 is a graph showing the axial ratio of the high frequency ratio dual function RF device according to the present invention as a function of frequency;
FIG. 10 is a normalized radiation pattern for a high frequency ratio dual function radio frequency device of the present invention at 40 GHz;
fig. 11 is a normalized radiation pattern for a high frequency ratio dual function radio frequency device of the present invention at 42 GHz.
Reference numerals illustrate:
| Reference numerals | Name of the name | Reference numerals | Name of the name |
| 100 | Square dielectric substrate | 111 | Port (port) |
| 200 | Metal reflecting plate | 112 | Coplanar waveguide feeder |
| 300 | First support column | 113 | First coplanar waveguide floor |
| 400 | Second support column | 114 | Second coplanar waveguide floor |
| 10 | T-shaped metal conductor plane | 110a | First slit |
| 20 | Low frequency filter | 120a | Second gap |
| 30 | Square dielectric polarizer | 21、22 | Coupled resonator |
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
The invention provides a high-frequency-ratio dual-function radio frequency device.
In order to solve the above-mentioned problems, the present invention proposes a large-frequency-ratio dual-function radio frequency device, referring to fig. 1 to 5, in an embodiment of the present invention, the large-frequency-ratio dual-function radio frequency device comprises:
a square dielectric substrate 100 having a first surface and a second surface disposed opposite to each other;
The two T-shaped metal conductor planes 10 are arranged on the first surface and correspond to two connected side edges of the square dielectric substrate 100, the two T-shaped metal conductor planes 10 are orthogonally distributed, a coplanar waveguide structure and a gap coupling structure are formed in the area of the two T-shaped metal conductor planes 10, and the coplanar waveguide structure and the gap coupling structure are mutually matched to form a millimeter wave antenna;
The low-frequency filter 20 is arranged on the second surface and is coupled with the coplanar waveguide structure so as to realize low-frequency filtering;
The two square dielectric polarizers 30 are arranged at the same side as the second surface at intervals, and the orthographic projection of the two square dielectric polarizers 30 and each T-shaped metal conductor plane 10 are arranged at 45 degrees.
In this embodiment, the thickness and the dielectric constant of the square dielectric substrate 100 have a great influence on the performance of two functions of the whole device, and the impedance matching characteristics of the two functions are adjusted by determining the dielectric constant and the thickness of the square dielectric substrate 100 and adjusting the transmission line characteristics (including the length and the width of the elongated slot) of the coplanar waveguide. The square dielectric substrate 100 is a plate material with a dielectric constant of 2.6, and the model is Rogers RT/duroid 5880LZ. The square dielectric substrate 100 has a first side surface and a second side surface opposite to each other, the first side surface is a side far away from the square dielectric polarizer 30, the second side surface is a side near to the square dielectric polarizer 30, the two T-shaped metal conductor planes 10 are disposed on the first side surface, and the low-frequency filter 20 is disposed on the second side surface. The two T-shaped metal conductor planes 10 and the low-frequency filter 20 are respectively arranged on two side surfaces of the square dielectric substrate 100, the low-frequency filter 20 and the two T-shaped metal conductor planes 10 can be arranged on the square dielectric substrate 100 in a patch mode, or can be plated layers etched by photoetching, for example, the low-frequency filter 20 and the two T-shaped metal conductor planes 10 can be respectively formed on two side surfaces of the square dielectric substrate 100 in a printed circuit wiring process mode. Specifically, the low frequency filter 20 and the circuit traces of the two T-shaped metal conductor planes 10 may be formed on the square dielectric substrate 100 by copper cladding and etching. Or the formed low-frequency filter 20 and the circuit wires of the two T-shaped metal conductor planes 10 are adhered to the square dielectric substrate 100, or are pressed onto the square dielectric substrate 100 through other processes. The low frequency filter 20 and the two T-shaped metal conductor planes 10 can be implemented by using metal copper foil, or can be made of other metal materials or nonmetallic conductive materials. The thickness, size and shape of the square dielectric substrate 100 may be set according to practical application products and application environments, so as to meet different application requirements. In a specific embodiment, the square dielectric substrate 100 may be square, for example, rectangular or square, and the square dielectric substrate 100 may be circular. The present embodiment may alternatively be a layer of metal copper etched on the lower surface (first side surface) of the square dielectric substrate 100, where the layer of metal copper forms a shape similar to two orthogonal letter-shapes placed in abutment, i.e. is etched in the shape of two T-shaped metal conductor planes 10. The shape of the low frequency filter 20 is etched on the upper surface (second side surface) of the square dielectric substrate 100, and the position of the low frequency filter 20 corresponds to the positions of the coplanar waveguide structure and the slot coupling structure to achieve energy transfer through the coplanar waveguide structure and the slot coupling structure.
The two coplanar waveguide structures arranged at the bottom, i.e. the first surface, of the square dielectric substrate 100 can excite the filter at the top of the dielectric patch, and also can excite the slot coupling structure in the coplanar waveguide structure, so that the filter can become a radiator of the antenna, i.e. energy can radiate from the slot. Electromagnetic waves in the millimeter wave frequency band can enter the antenna through any one of the coplanar waveguide structures, so that the antenna can generate dual-polarized radiation.
The filter arranged on the top of the square dielectric substrate 100, i.e. the second surface, is excited by one of the two coplanar waveguide structures, and the low-frequency electromagnetic wave can enter the filter through the coplanar waveguide structure and be output by the other coplanar waveguide structure, thereby realizing low-frequency filtering. Wherein, the center operating frequency of the low frequency filter 20 is 5.8GHz, and the center operating frequency of the millimeter wave antenna is 42GHz.
The height of the two square dielectric polarizers 30 is related to the dielectric constant of the material, and in order to achieve the purpose of converting the polarization direction of the electromagnetic wave, the square dielectric polarizers 30 may be made of a plate material with a relative dielectric constant of 2.6, and the shape of the square dielectric polarizers includes but is not limited to a rotation symmetrical structure such as a cross shape, a circular ring shape, a square shape and a square frame shape. Two square dielectric polarizers 30 are arranged in parallel and each is arranged at 45 ° to one of the T-shaped metal conductor planes 10. In the two square dielectric polarizers 30, the projection of each square dielectric polarizer 30 on the square dielectric substrate 100 is correspondingly located in the middle of one T-shaped metal conductor plane 10, and the projection of the center of the square dielectric polarizer 30 on the square dielectric substrate 100 is coincident with the center of the T-shaped metal conductor plane 10, specifically, can be coincident with the slot coupling structure. The two dielectric polarizers can respectively realize left-hand circular polarization and right-hand circular polarization of millimeter wave frequency bands, and in the design process, linear polarized electromagnetic waves radiated by the millimeter wave antenna formed by the two T-shaped metal conductor planes 10 can be converted into circular polarized electromagnetic waves by the two square dielectric polarizers 30 by adjusting the physical size of the dielectric polarizers.
The invention provides a large-frequency-ratio dual-functional radio frequency device with millimeter wave circular polarization antenna function and low-frequency filter 20 function, which can excite a filter at the top of a medium collecting sheet and also excite a slot coupling structure in a coplanar waveguide by arranging a coplanar waveguide structure at the bottom of a medium substrate, so that the filter can become a radiator of the antenna, namely energy is radiated from the slot coupling structure, and linear polarization waves radiated by the antenna are converted into circular polarization through two square medium polarizers 30. The present invention presents challenges that can address future communication system requirements for multi-band coexistence and device miniaturization. In addition, the radio frequency equipment with the dual functions of the antenna and the filter provides a feasible scheme for improving the integration level of the system in the future and also provides technical reserves for more wireless communication technologies with integrated functions.
Referring to fig. 4, in an embodiment, each of the coplanar waveguide structures includes:
a port 111 disposed at a side of the square dielectric substrate 100;
A coplanar waveguide feeder 112 having one end electrically connected to the port 111 and the other end extending to a side facing away from the port 111;
The first coplanar waveguide floor 113 and the second coplanar waveguide floor 114 are electrically connected to the port 111, are separately disposed on two sides of the coplanar waveguide feeder 112, and form a first gap 110a with the coplanar waveguide feeder 112.
Each of the slot coupling structures includes:
A second slot 120a, the second slot 120a being formed at a common connection between the first coplanar waveguide floor 113, the second coplanar waveguide floor 114, and the coplanar waveguide feed 112.
In this embodiment, the ports 111 of the two coplanar waveguide structures are respectively disposed on two sides of the square dielectric substrate 100 that are adjacently disposed, one end of the coplanar waveguide feeder 112 is connected to the ports 111 and extends from the ports 111 to the center of the square dielectric substrate 100, the first coplanar waveguide floor 113 and the second coplanar waveguide floor 114 are disposed on two sides of the coplanar waveguide feeder 112, and a gap is formed between the first coplanar waveguide floor 113 and the coplanar waveguide feeder 112, and between the second coplanar waveguide floor 114 and the coplanar waveguide feeder 112, i.e. the first gap 110a, the first gap 110a and the surrounding metal cooperate to perform the coplanar waveguide function. The second slot 120a is formed at the common connection between the first coplanar waveguide floor 113, the second coplanar waveguide floor 114 and the coplanar waveguide feeder 112, and the second slot 120a forms a millimeter wave antenna together with the first coplanar waveguide floor 113, the second coplanar waveguide floor 114 and the coplanar waveguide feeder 112.
When the large-frequency-ratio dual-function radio frequency device works normally, low-frequency electromagnetic waves can enter the low-frequency filter 20 through the port 111 of any one of the two coplanar waveguide structures and reach the port 111 of the other coplanar waveguide structure, so that low-frequency filtering of the two ports 111 is realized, specifically, after the low-frequency electromagnetic waves are accessed from one port 111, the low-frequency electromagnetic waves are conducted to a common point among the first coplanar waveguide floor 113, the second coplanar waveguide floor 114 and the coplanar waveguide feeder 112 through the coplanar waveguide feeder 112, are coupled to the low-frequency filter 20 positioned on the second surface through a medium, and are conducted to the other port 111 through the coplanar waveguide feeder 112 on the other T-shaped metal conductor plane 10 after the low-frequency filter 20 is coupled through the medium, so that the low-frequency filtering is completed. The high-frequency electromagnetic wave can enter the antenna radiation source through any one port 111 in the two coplanar waveguide structures, namely the second gap 120a, so that the antenna can generate dual-polarized high-frequency radiation, then the dual-polarized high-frequency radiation is matched with the medium polarizer positioned above, and the dual-polarized high-frequency radiation can be radiated to the medium polarizer through the second gap 120a to complete left-handed source polarization or right-handed circular polarization. The width and length of the second slit 120a can be adjusted, so that the bandwidth and isolation of the port 111 can be adjusted.
Referring to fig. 5, in an embodiment, the low frequency filter 20 includes:
The two coupling resonators 21 and 22 are coupled and connected, and are respectively arranged corresponding to the position of the gap coupling structure.
In this embodiment, two T-shaped metal conductor planes 10 are respectively disposed on the two coupling resonators 21 and 22, and the routing direction of the two coupling resonators 21 and 22 is perpendicular to the direction of the coplanar waveguide feeder 112, and the intersection of the two coupling resonators 21 and 22 is the orthogonal position of the two T-shaped metal conductor planes 10. The end wiring area of the two coupled resonators 21, 22 is larger than the middle wiring area to reduce electromagnetic wave loss, which is advantageous for improving the performance of the filter. By adjusting the length and the broadband of the microstrip lines of the two coupled resonators 21, 22 of the filter, the operating frequency and the filter insertion loss can be adjusted.
Referring to fig. 1 to 3, in one embodiment, each of the square dielectric polarizers 30 includes:
the medium sheets are arranged at intervals and are connected with one another through connecting pieces.
In this embodiment, the plurality of dielectric sheets are disposed in parallel, and the projection of each dielectric sheet on the square dielectric substrate 100 forms an included angle of 45 ° with the corresponding T-shaped metal conductor plane 10, that is, each dielectric sheet forms an included angle of 45 ° with the azimuth plane. The number of the dielectric sheets, the widths of the dielectric sheets and the spacing between the adjacent dielectric sheets can be adjusted according to the millimeter wave antenna, and the number of the dielectric sheets, the widths of the adjacent dielectric sheets and the spacing between the adjacent dielectric sheets can be 5 or more. When the electromagnetic wave emitted by the millimeter wave antenna passes through the square dielectric polarizer 30, the dielectric sheet in the square dielectric polarizer 30 can generate disturbance to the linear polarized wave, so that two mutually orthogonal modes are generated, the electromagnetic wave amplitudes of the two modes are the same and the phase difference is 90 degrees, and finally circular polarized radiation is realized. The invention converts the linear polarized wave radiated by the antenna into circular polarization through the square dielectric polarizer 30, and the circular polarization axial ratio parameter can be optimized by adjusting the size and the distance between the linear polarized wave and the dielectric substrate. In addition, the square dielectric polarizer 30 can also improve the gain of the antenna.
Referring to fig. 1 or 3, in an embodiment, the large frequency ratio dual function radio frequency device further includes:
metal reflecting plates 200 arranged at intervals on the same side as the second surface
In this embodiment, the metal reflecting plate 200 is used for directing the radiation pattern of the millimeter wave antenna, and in practical application, the metal reflecting plate 200 corresponds to the millimeter wave antenna disposed on the second surface, and the metal reflecting plate 200 can direct the electromagnetic wave radiated by the millimeter wave antenna, and transmit the electromagnetic wave to the square dielectric polarizer 30, so as to implement circularly polarized radiation. The metal reflecting plate 200 in the invention has the function of orienting the radiation pattern of the antenna, and the radiation pattern of the antenna can be adjusted by adjusting the distance between the metal reflecting plate and the dielectric substrate and the thickness of the metal reflecting plate. In addition, its size has a certain influence on the insertion loss of the filter.
Referring to fig. 1 or 3, in an embodiment, a plurality of first support columns 300, one end of each first support column 300 is fixed to the square dielectric substrate 100, and the other end of each first support column 300 is fixed to the metal reflective plate 200.
In this embodiment, the metal reflecting plate 200 is disposed at the bottom of the whole antenna, and is fixed with the square dielectric substrate 100 above it by four screws and the first supporting columns 300, so that the metal reflecting plate 200 and the square dielectric substrate 100 disposed above it are combined together to form a large-frequency-ratio dual-function radio frequency device.
Referring to fig. 1 or 3, in an embodiment, a plurality of second support columns 400, two of the square dielectric polarizers 30 are fixed to the square dielectric substrate 100 through the second support columns 400.
The square dielectric polarizer 30 is fixed above the square dielectric substrate 100 by a second support column 400. The second support column 400 may be made of a material having a dielectric constant identical to that of the square dielectric polarizer 30, so as to reduce the influence of the second support column 400 on the circuit parameters and radiation parameters of the antenna. In practical application, the second support column 400 may be connected with the square dielectric substrate 100 through threads, for example, one end of the second support column 400, which is close to the square dielectric substrate 100, may be set to be a threaded structure, the threaded structure penetrates through the square dielectric substrate 100, and then the square dielectric substrate 100 and the second support column 400 are locked by nuts, so that the square dielectric polarizer 30 and the square dielectric substrate 100 may be fixed.
The filtering and radiation characteristics of the large-frequency-ratio dual-function radio frequency device are further described by combining experiments:
Referring to fig. 1 to 5, the large frequency ratio dual function radio frequency device based on coplanar waveguide feeding includes: two square dielectric polarizers 30, one dielectric substrate and one metal reflecting plate 200; the two square dielectric polarizers 30 are fixed above the dielectric substrate through the second support columns 400 below thereof, so that the linear polarized electromagnetic waves radiated by the antenna are converted into circular polarized electromagnetic waves; the dielectric substrate is etched with metallic copper on both the top and bottom. Wherein the top metallic copper acts as a low frequency filter 20. The metallic copper at the bottom is similar to two orthogonal T-letter shapes placed in a collision mode, and two nonmetal gaps are arranged in the metallic copper, wherein the slender gaps and surrounding metal serve as coplanar waveguide functions, and the wide and short gaps serve as millimeter wave antennas. The coplanar waveguide has two input ports 111 located at the lower and right edges of the dielectric substrate, respectively. The coplanar waveguide is both a feed circuit for the millimeter wave antenna and a feed circuit for the low frequency filter 20; the metal reflecting plate 200 is placed under a dielectric substrate, and the dielectric substrate and the metal reflecting plate 200 are fixed together with a first supporting column 300. The low-frequency electromagnetic wave can enter the filter through one port 111 of the coplanar waveguide and reach the other port 111, so that the low-frequency filtering of the two ports 111 is realized. Electromagnetic waves in the millimeter wave band can enter the antenna through any one port 111 of the coplanar waveguide, so that the antenna can generate dual-polarized radiation.
Referring to fig. 6 and 7, fig. 6 and 7 are specific dimensions of the antenna, which are shown in table 1 (unit: mm).
TABLE 1
Referring to fig. 8 and 9, fig. 8 shows an S parameter and an antenna gain measured by HFSS simulation software, and fig. 9 shows an axial ratio graph of an axial ratio changing with frequency, where it can be seen that the working range of the high-frequency dual-function radio frequency device is that the low frequency filter 20 frequency band (S11 < -10 dB) is 5.76GHz-6.04GHz, the bandwidth is 4.7%, and the average insertion loss in the passband is 1.31dB; the millimeter wave antenna frequency band (S11 < -10 dB) is 37.87GHz-45.08GHz, the bandwidth is 17.3%, and the in-band isolation is below-30 dB; the average gain of the millimeter wave circularly polarized antenna is 16.05dBic, the gain floating range is 0.9dB, the axial ratio range (AR < 3 dB) completely covers the passband of the millimeter wave antenna, and the range is 37.06GHz-46GHz and above.
Referring to fig. 10 and 11, which are the results of the directivity pattern of the millimeter wave antenna section of the large-ratio dual-function radio frequency device in the present embodiment, it can be seen from the figure that the radiation of the millimeter wave antenna belongs to circularly polarized directional radiation with less cross polarization. Wherein fig. 10 is a diagram at 40GHz and fig. 11 is a diagram at 42GHz, each of which includes parameters GainRHCP and GainLHCP on both sides.
From the above test results, the large-frequency-ratio dual-function radio frequency device provided by the invention integrates the millimeter wave circularly polarized antenna and the low-frequency filter 20 on the same device, and the performance of the two functions is superior. The device realizes the filtering of the microwave frequency band filter and the circular polarization radiation of the millimeter wave frequency band, thus realizing the dual-function integration of the filter and the antenna, and the ratio of the center frequencies of the two working frequency bands is 7. The invention can be applied to reconfigurable communication networks requiring switchable functions, because it can be adjusted correspondingly according to different requirements, thereby reducing the system development cost and period. Meanwhile, the invention provides a feasible scheme for improving the system integration technology, and also provides technical reserves for wireless communication systems requiring miniaturization and multifunctional integration in the future.
The above embodiments are only one of the specific implementation manners selected after the optimization, and modifications or variations within the scope of the technical solution of the present invention by those skilled in the art should be included in the scope of the present invention.
The invention also provides a wireless transmission system which comprises the large-frequency-ratio dual-function radio frequency equipment;
the detailed structure of the large-frequency-ratio dual-function radio frequency device can refer to the above embodiments, and will not be described herein again; it can be understood that, because the above-mentioned dual-function radio frequency device with a large frequency ratio is used in the wireless transmission system of the present invention, the embodiments of the wireless transmission system of the present invention include all the technical solutions of all the embodiments of the above-mentioned dual-function radio frequency device with a large frequency ratio, and the achieved technical effects are identical, and are not repeated herein.
The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (10)
1. A high frequency ratio dual function radio frequency device, the high frequency ratio dual function radio frequency device comprising:
the square dielectric substrate is provided with a first surface and a second surface which are oppositely arranged;
The two T-shaped metal conductor planes are arranged on the first surface and correspond to two side edges connected with the square dielectric substrate, the two T-shaped metal conductor planes are orthogonally distributed, a coplanar waveguide structure and a gap coupling structure are formed in the areas of the two T-shaped metal conductor planes, and the coplanar waveguide structure and the gap coupling structure are mutually matched to form a millimeter wave antenna;
The low-frequency filter is arranged on the second surface and is coupled with the coplanar waveguide structure so as to realize low-frequency filtering;
The two square dielectric polarizers are arranged at the same side of the second surface at intervals, and the orthographic projection of the two square dielectric polarizers and each T-shaped metal conductor plane are arranged at 45 degrees.
2. The high frequency ratio dual function radio frequency device of claim 1, wherein each of the coplanar waveguide structures comprises:
the port is arranged on the side edge of the square dielectric substrate;
A coplanar waveguide feeder, one end of which is electrically connected with the port, and the other end of which extends to one side deviating from the port;
The first coplanar waveguide floor and the second coplanar waveguide floor are electrically connected with the port, are respectively arranged on two sides of the coplanar waveguide feeder line, and form a first gap with the coplanar waveguide feeder line.
3. The high frequency ratio dual function radio frequency device of claim 2, wherein each of said slot coupling structures comprises:
And the second gap is formed at a public connection part among the first coplanar waveguide floor, the second coplanar waveguide floor and the coplanar waveguide feeder line.
4. The high frequency ratio dual function radio frequency device of claim 3, wherein the low frequency filter comprises:
the two coupling resonators are connected and respectively correspond to the upper parts of the gap coupling structures.
5. The high frequency ratio dual function radio frequency device of claim 1, wherein each of said square dielectric polarizers comprises:
the medium sheets are arranged at intervals and are connected with one another through connecting pieces.
6. The high frequency ratio dual function radio frequency device of claim 1, wherein the high frequency ratio dual function radio frequency device further comprises:
and the metal reflecting plates are arranged below the same side of the second surface at intervals.
7. A high frequency ratio dual function radio frequency device as defined in any one of claims 1-6, wherein,
The center working frequency of the low-frequency filter is 5.8GHz, and the center working frequency of the millimeter wave antenna is 42GHz.
8. A high frequency ratio dual function radio frequency device as defined in any one of claims 1-6, wherein,
The first support columns are fixed at one ends of the square dielectric substrates, and the other ends of the first support columns are fixed on the metal reflecting plates.
9. The high ratio dual function rf device of any one of claims 1-6, wherein a plurality of second support posts, two of the square dielectric polarizers are secured to the square dielectric substrate by the second support posts.
10. A wireless transmission system comprising a high frequency ratio dual function radio frequency device according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210996241.0A CN115411513B (en) | 2022-08-18 | Large-frequency-ratio dual-function radio frequency equipment and wireless transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210996241.0A CN115411513B (en) | 2022-08-18 | Large-frequency-ratio dual-function radio frequency equipment and wireless transmission system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115411513A CN115411513A (en) | 2022-11-29 |
| CN115411513B true CN115411513B (en) | 2024-11-19 |
Family
ID=
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811116A (en) * | 2016-04-13 | 2016-07-27 | 西安电子科技大学 | COS type frequency selective surface based polarization selector and design method therefor |
| CN109786976A (en) * | 2018-12-20 | 2019-05-21 | 西安工业大学 | Based on multilayer FSS structure multifunctional circular polarisation switch array, wireless communication system |
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811116A (en) * | 2016-04-13 | 2016-07-27 | 西安电子科技大学 | COS type frequency selective surface based polarization selector and design method therefor |
| CN109786976A (en) * | 2018-12-20 | 2019-05-21 | 西安工业大学 | Based on multilayer FSS structure multifunctional circular polarisation switch array, wireless communication system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8854270B2 (en) | Hybrid multi-antenna system and wireless communication apparatus using the same | |
| US6246377B1 (en) | Antenna comprising two separate wideband notch regions on one coplanar substrate | |
| US6292153B1 (en) | Antenna comprising two wideband notch regions on one coplanar substrate | |
| CN112290227B (en) | Dual-frequency dual-circularly-polarized antenna array | |
| CN111052504A (en) | Millimeter wave antenna array element, array antenna and communication product | |
| CN112993557B (en) | Common-caliber low-profile dual-frequency dual-circularly-polarized antenna structure | |
| CN113097718B (en) | Dual-frequency dual-circular-polarization common-caliber antenna for satellite communication | |
| CN113506989B (en) | 5G millimeter wave dielectric resonator antenna and array thereof | |
| CN113540810A (en) | Microstrip slot coupling super-surface antenna with open rectangular ring loaded | |
| CN113809518B (en) | Microwave and millimeter wave large-frequency ratio common-aperture antenna with high isolation | |
| WO2006079994A1 (en) | Radiation enhanced cavity antenna with dielectric | |
| CN112968281B (en) | Dual-polarized filtering antenna unit and dual-polarized filtering antenna array | |
| CN114374085A (en) | Dual-polarization hybrid antenna for 5G millimeter wave dual-band application | |
| CN112531355B (en) | +/-45-degree dual-polarized millimeter wave array antenna | |
| CN111541018B (en) | High-gain steep filtering fusion duplex integrated antenna | |
| CN111244604B (en) | Dual-polarized millimeter wave dielectric resonator antenna for mobile terminal | |
| CN109560388B (en) | Millimeter wave broadband circularly polarized antenna based on substrate integrated waveguide horn | |
| AU2005222115A1 (en) | High gain antenna for microwave frequencies | |
| CN111987448B (en) | Dual-polarized Vivaldi antenna | |
| WO2023138324A1 (en) | Antenna structure, electronic device and wireless network system | |
| CN115411513B (en) | Large-frequency-ratio dual-function radio frequency equipment and wireless transmission system | |
| CN110931968A (en) | Low cross polarization millimeter wave microstrip flat plate array antenna | |
| CN113782960B (en) | Orthogonal linear polarization miniaturized common-caliber antenna | |
| CN116404414A (en) | Microwave/millimeter wave double-frequency broadband common-caliber antenna with multiplexing structure | |
| CN112054288B (en) | Electronic device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |