CN211789436U - Antenna radio frequency front end device - Google Patents

Abstract

The application relates to an antenna radio frequency front end device, including: a radio frequency transceiver and an antenna device; the antenna device comprises a substrate and two or more than two dual-polarized inverted yagi antennas; the radio frequency transceiver comprises a filter, a circulator, a receiver and a transmitter. Above-mentioned antenna radio frequency front end device, at first realize the dual polarization through the mode of inversion and fall the yagi antenna, make the radiation direction of dual polarization fall the yagi antenna towards ground, thereby make ground can be with the whole reflection of the energy of radiating, the dorsad radiation of antenna has been reduced, antenna device's whole gain has been improved, secondly through constitute the antenna array setting with the dual polarization fall the yagi antenna on the base plate, with antenna device design for three-dimensional array structure, make antenna device can form perpendicular plane wave beam, realize the receiving and dispatching of signal by radio frequency transceiver at last, thereby antenna whole gain has been improved.

Description

Antenna radio frequency front end device

Technical Field

The present application relates to the field of antenna technology, and in particular, to an antenna rf front end device.

Background

An antenna is an indispensable important component of any radio communication system, and although the tasks to be performed by various types of radio devices are different, the roles of the antennas in the devices are basically the same. Any radio device transmits information by radio waves, and therefore must have a means of radiating or receiving electromagnetic waves.

The traditional antenna radio frequency front end mainly uses a single polarization antenna and also has an array antenna, but the antenna is mainly an array in the vertical direction, and the antenna structures are arranged in two dimensions, so that high gain is difficult to realize, the traditional antenna system has limited improvement on communication performance and poor gain effect.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide an antenna rf front-end apparatus for solving the problem of poor gain effect of the conventional antenna.

An antenna radio frequency front end device, comprising: a radio frequency transceiver and an antenna device;

the antenna device comprises a substrate and two or more than two dual-polarized inverted yagi antennas; the radio frequency transceiver comprises a filter, a circulator, a receiver and a transmitter, the dual-polarized inverted yagi antennas are connected with the filter, the filter is connected with the circulator through optical fibers, and the circulator is respectively connected with the receiver and the transmitter through the optical fibers;

the dual-polarized inverted yagi antenna comprises an antenna axial rod, a dual-polarized reflector, a dual-polarized active oscillator and a dual-polarized director;

the dual-polarized director, the dual-polarized active oscillator and the dual-polarized reflector are sequentially arranged on the axial rod of the antenna; the dual-polarized director is arranged at the near-ground end of the antenna axial rod, and the dual-polarized reflector is arranged at the far-ground end of the antenna axial rod; the near-ground end of the antenna axial rod is used for grounding, and the far-ground end of the antenna axial rod is far away from the ground;

the dual-polarized director comprises a first director and a second director which are orthogonally arranged, the first director and the second director comprise a plurality of metal pieces arranged on an axial rod of the antenna, each metal piece is perpendicular to the axial rod of the antenna, a vertical foot is superposed with the midpoint of each metal piece, the length of each metal piece is shorter than that of the adjacent metal piece close to the dual-polarized active oscillator, and when the first director and the second director orthogonally form the dual-polarized director, each two metal pieces with the same length are kept orthogonal and positioned in the same plane;

the dual-polarized reflector comprises a first reflector and a second reflector which are orthogonally arranged, the first reflector and the second reflector respectively comprise metal pieces arranged on two sides of an axial rod of the antenna, the metal pieces of the dual-polarized reflector are perpendicular to the axial rod of the antenna, a foot is coincident with the midpoint of the metal pieces, the first reflector and the first director are positioned in the same plane, the second reflector and the second director are positioned in the same plane, and the length of the metal pieces of the dual-polarized reflector is longer than that of any metal piece of the dual-polarized director;

the dual-polarized active oscillator comprises two single-polarized active oscillators which are orthogonally arranged, namely a first active oscillator and a second active oscillator, wherein the first active oscillator and the second active oscillator are respectively composed of two L-shaped metal parts which are symmetrically arranged on two sides of an antenna axial rod, one arm of each L-shaped metal part is a connecting arm and is attached to the antenna axial rod, a port of each connecting arm is connected with the dual-polarized reflector, the other arm of each L-shaped metal part is a functional arm, and the length of each functional arm is longer than that of the corresponding director and shorter than that of the corresponding reflector; meanwhile, the first active oscillator and the first reflector are in the same plane, and the second active oscillator and the second reflector are in the same plane.

Above-mentioned antenna radio frequency front end device, at first adopt the cross structure to realize the dual polarization constitution of two single polarization antenna element, reducible signal polarization loss, the gain that makes antenna device's horizontal perpendicular bi-directional is all good, and through dual polarization inverted yagi antenna, make the radiation direction of dual polarization inverted yagi antenna towards ground, thereby make ground can be with the whole reflection of the energy of radiating back, the dorsad radiation of antenna has been reduced, antenna device's whole gain has been improved, secondly through constitute the antenna array setting with dual polarization inverted yagi antenna on the base plate, with antenna device design for three-dimensional array structure of group, make antenna device can form the perpendicular wave beam, realize the receiving and dispatching of signal by radio frequency transceiver at last, thereby antenna whole gain has been improved.

In one embodiment, dual-polarized inverted yagi antennas of different frequency bands are arranged on the substrate in a crossed manner.

In one embodiment, the dual-polarized inverted yagi antenna further comprises a reflection plate, the reflection plate is arranged at the ground end of the antenna axial rod, and the antenna axial rod is grounded through the reflection plate.

In one embodiment, the dual-polarized inverted yagi antenna further comprises a radome, wherein the radome is a cavity structure with one open end and the other closed end, and the open end is fixed on the reflector plate.

In one embodiment, the dual-polarized active element further comprises a feeding structure disposed on the first active element and a feeding structure disposed on the second active element, each feeding structure comprising:

the metal bump is arranged on one functional arm and used for receiving feed;

a coaxial line, one end port of which is connected with the metal bump and used for transmitting current to the single-polarization active oscillator to drive the antenna to work;

the supporting piece is coated outside the coaxial line and used for isolating the coaxial line from the external environment;

and the metal shell is arranged outside the support piece, and a part of the metal shell is embedded into the functional arm without the metal bump.

In one embodiment, the dual-polarized inverted-yagi antenna further comprises a feed input component, and the feed input component is connected with the feed structure on the first active element and the feed structure on the second active element.

In one embodiment, the feed input assembly is disposed at the distal end of the axial rod of the antenna.

In one embodiment, the feed input assembly includes a coaxial feed line connecting the feed structure on the first active element and the feed structure on the second active element.

In one embodiment, the feed input assembly comprises a balun feed arrangement connecting the feed structure on the first active element and the feed structure on the second active element.

In one embodiment, the antenna axial rod includes a first feed aggregation plate, a second feed aggregation plate, a third feed aggregation plate, and a fourth feed aggregation plate, the first feed aggregation plate, the second feed aggregation plate, the third feed aggregation plate, and the fourth feed aggregation plate surround to form a cavity, and a dielectric strip is disposed in the cavity.

Drawings

FIG. 1 is a block diagram of an antenna RF front-end device according to an embodiment;

FIG. 2 is a block diagram of an antenna assembly according to one embodiment;

FIG. 3 is a schematic diagram of a dual-polarized inverted yagi antenna in one embodiment;

fig. 4 is a schematic distribution diagram of a dual-polarized inverted yagi antenna in another embodiment;

fig. 5 is a front view of the overall structure of a dual polarized inverted yagi antenna in one embodiment;

fig. 6 is a rear view of the overall structure of the dual polarized inverted yagi antenna of an embodiment;

FIG. 7 is an exploded view of an embodiment of a dual polarized inverted yagi antenna;

fig. 8 is an elevation view of an embodiment of a dual polarized inverted yagi antenna after detonation;

FIG. 9 is a diagram illustrating an embodiment of an active oscillator structure;

FIG. 10 is a side view of an embodiment of a dual polarized inverted yagi antenna;

FIG. 11 is a schematic diagram of one direction of a feeding structure in one embodiment;

FIG. 12 is a schematic diagram of another direction of the feeding structure in one embodiment;

fig. 13 is a front view of the overall structure of a dual polarized inverted yagi antenna of another embodiment;

fig. 14 is a rear view of the overall structure of a dual polarized inverted yagi antenna of another embodiment;

fig. 15 is a block diagram of an antenna rf front-end device in another embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

In one embodiment, an antenna rf front-end device is provided, as shown in fig. 1 and fig. 2, including an antenna device 1 and an rf transceiver 2, where the antenna device 1 includes a substrate 11 and two or more dual-polarized inverted yagi antennas 12, each dual-polarized inverted yagi antenna 12 is disposed on the substrate 11, the rf transceiver 2 includes a filter 21 (for filtering out harmonic clutter and reducing interference), a circulator 22, a transmitter 23, and a receiver 24, each dual-polarized inverted yagi antenna 12 on the substrate 11 is connected to the filter 21, the filter 21 connects the circulator 22 with the receiver 24 through an optical fiber, and the circulator 22 connects the receiver 24 and the transmitter 23 through an optical fiber. Specifically, the dual-polarized inverted-yagi antenna 12 is vertically disposed on the substrate 11, the material of the substrate 11 is not unique, and may be a metal plate or a plastic plate, in this embodiment, the substrate 11 is a metal substrate, and fixing members (for example, fixing bolts) are respectively disposed at four corners of the substrate 11, and the substrate 11 is fixed on the ground through the fixing members (so that the dual-polarized inverted-yagi antenna 12 disposed on the substrate 11 has a near-ground end and a far-ground end), thereby improving the fixing reliability of the substrate 11. The frequency bands of the dual-polarized inverted yagi antennas 12 may be the same or different. In this embodiment, the dual-polarized inverted yagi antennas 12 of different frequency bands are arranged in the substrate 11 in a crossed manner. As shown in fig. 3, the dual-polarized inverted-yagi antenna 12 includes a frequency band 1 antenna and a frequency band 2 antenna, and the dual-polarized inverted-yagi antennas 12 of two different frequency bands are arranged in a crossing manner. The specific structural dimensions of the dual-polarized inverted-yagi antennas 12 in different frequency bands are different, as shown in fig. 4, a staggered high-gain array pattern diagram between the dual-polarized inverted-yagi antennas 12 in different frequency bands is shown, the antenna in frequency band 1 is a low-frequency antenna and has a high height, and the antenna in frequency band 2 is a high-frequency antenna and has a low height. The dual-polarized inverted yagi antennas 12 with different frequency bands are placed in a crossed mode, namely, the distance between the two dual-polarized inverted yagi antennas 12 is enlarged, the effective caliber area is indirectly increased, and the antenna gain is improved.

Further, referring to fig. 5, a specific structure of the dual-polarized inverted-yagi antenna 12 is shown in fig. 5, which includes a dual-polarized director 110, a dual-polarized active element 120, a dual-polarized reflector 130 and an antenna axial rod 140.

The dual-polarized director 110, the dual-polarized active element 120 and the dual-polarized reflector 130 are sequentially arranged on the antenna axial rod 140; the dual-polarized director 110 is arranged at the ground-proximal end of the antenna axial rod 140, and the dual-polarized reflector 130 is arranged at the ground-distal end of the antenna axial rod 140; the proximal end of the antenna axial rod 140 is used for grounding, and the distal end of the antenna axial rod 140 is far away from the ground. It should be noted that fig. 5 and 6 only show the overall structure of the dual-polarized inverted-yagi antenna 12, and the detailed and detailed descriptions of the dual-polarized director 110, the dual-polarized active element 120 and the dual-polarized reflector 130 will be provided in subsequent fig. 7-12.

In one embodiment, as shown in fig. 5, the dual-polarized inverted yagi antenna further includes a reflection plate 300, the reflection plate 300 is disposed at the ground end of the antenna axial rod 140, and the antenna axial rod 140 is grounded through the reflection plate 300. The substrate 11 is disposed on a horizontal ground, the reflection plate 300 is connected to the antenna axial rod 140 and then disposed on the substrate 11, and the reflection plate 300 is a metal flat plate having a rectangular shape, a circular shape, a regular polygon shape, or the like, and is used for enhancing reflection and improving the front-to-back ratio of the antenna.

Further, in an embodiment, although not shown, the dual-polarized inverted-yagi antenna 12 further includes a radome, which is a cavity structure with one end open and the other end closed, and the open end is fixed on the reflector 300. The dual-polarized inverted yagi antenna 12 can be placed in the radome cavity structure to protect the antenna components.

It should be noted that fig. 5 also shows a coaxial feed line 500, and the coaxial feed line 500 will be explained in detail later herein, fig. 6 is a rear view corresponding to fig. 5, and the dual-polarized inverted-yagi antenna 12 in fig. 6 has the same overall structure as the dual-polarized inverted-yagi antenna 12 provided in fig. 5, so that detailed description of fig. 2 is omitted here.

In one embodiment, as shown in fig. 7 and 8, the dual-polarized directors 110, the dual-polarized active elements 120 and the dual-polarized reflectors 130 are independent from each other and are sequentially disposed on the antenna axial rod 140 (not shown), it should be noted that, in the dual-polarized inverted yagi antenna 12, the number of the dual-polarized directors 110 may be plural and the length of the dual-polarized directors may be different, for example, four dual-polarized directors 110 are shown in fig. 7 and 8, and the length of the dual-polarized reflectors 130 is the longest, the dual-polarized directors 110 are slightly shorter than the dual-polarized reflectors 130, and the length of the dual-polarized active elements 120 is the shortest. For convenience of description, the two ends of the antenna axial rod 140 are not referred to as an a end and a B end, respectively, where the a end represents a near-ground end, the B end represents a far-ground end, the dual-polarized director 110 is disposed at the a end, and the dual-polarized reflector 130 is disposed at the B end.

The dual-polarized director 110 includes a first director and a second director which are orthogonally arranged, the first director and the second director are the same, and are composed of a plurality of metal pieces arranged on the antenna axial rod 140, where the metal pieces may be metal rods or metal strips, the metal pieces are perpendicular to the antenna axial rod 140, and the vertical feet coincide with the middle point of the metal pieces, so that the two ends of the metal pieces are symmetrically arranged on the antenna axial rod 140. Meanwhile, the length relationship among the metal pieces is as follows: the lengths of the metal parts are different, and the length of each metal part is shorter than that of the adjacent metal part close to the dual-polarized active oscillator 120, namely the lengths of the metal parts are sequentially shortened along the direction from the end B to the end A; or the metal pieces can be divided into a plurality of groups along the direction from the end B to the end A, the length of the plurality of metal pieces in each group is the same, but the length of each group of metal pieces is shorter than that of the adjacent group of metal pieces close to the end B. Meanwhile, when the first director and the second director are orthogonally combined into the dual-polarized director, the metal pieces with the same length are also kept orthogonal and in the same plane, that is, the metal pieces with the same length form a cross shape as shown in the figure and are arranged on the antenna axial rod 140.

The dual-polarized reflector 130 includes a first reflector and a second reflector which are orthogonally arranged, the first reflector and the second reflector are the same, and are respectively composed of a metal piece arranged on the antenna axial rod 140, the metal piece is perpendicular to the antenna axial rod 140, and the vertical foot coincides with the midpoint of the metal piece, so that two ends of the metal piece are symmetrically arranged on the antenna axial rod 140, and the first reflector and the second reflector are in the same plane. The length of the piece of metal of dual-polarized reflector 130 is longer than the length of any piece of metal of dual-polarized director 110.

As shown in fig. 9, the dual-polarized active element 120 includes two identical single-polarized active elements that are orthogonally disposed, that is, a first active element and a second active element, and are respectively composed of two L-shaped metal elements that are symmetrically disposed on two sides of the antenna axial rod 140, one of the arms of the L-shaped metal element is a connecting arm 121 attached to the antenna axial rod 140, and a port 122 on the connecting arm 121 is connected to a corresponding metal element of the dual-polarized reflector 130, that is, one L-shaped metal element of the first active element is connected to a metal element on one side of the first reflector, the other L-shaped metal element of the first active element is connected to a metal element on the other side of the first reflector, and the second active element is also referred to as a second active element. The other arm of the L-shaped metal element is a functional arm 123, and the sum of the lengths of the two functional arms of the active element, which are arranged on the two sides of the antenna axial rod 140, is greater than the length of any metal element of the dual-polarization director 101 and less than the length of the metal element of the dual-polarization reflector 130. The angle between the connecting arm 121 and the functional arm 123 of the L-shaped metal member can be adjusted according to the actual signal transceiving requirement, and in one embodiment, the angle between the connecting arm 121 and the functional arm 123 of the L-shaped metal member is 90 °.

Referring to fig. 10, the relationship between dual-polarized director 110, dual-polarized active element 120 and dual-polarized reflector 130 further comprises: the first active oscillator, the first reflector and the first director are positioned in the same plane, the second active oscillator, the second reflector and the second director are positioned in the same plane, and the view of the whole antenna from the A end to the B end is approximately in a cross shape.

Referring to fig. 11 and 12, in one embodiment, a feeding structure 200 is disposed on both the first active element and the second active element of the dual-polarized active element 130, and includes:

a metal bump 201 as a feeding point, disposed on one of the functional arms 123a of the single-polarized active oscillator, for receiving feeding;

a port at one end of the coaxial line 202 is connected with the metal bump 201, and is used for transmitting current to the active oscillator to drive the antenna to work;

a support member 203, which is wrapped outside the coaxial line 202, and is used for isolating the coaxial line 202 from the external environment, and in one embodiment, the support member is made of teflon, which further plays an insulating role;

the metal shell 204 is disposed outside the supporting member 203, and a portion of the metal shell 204 is embedded in the other functional arm 123b without the metal bump 201, so as to ground the metal shell, so that the coaxial line 202 and the metal shell 204 form a potential difference.

In one embodiment, the dual polarized inverted yagi antenna 12 further comprises a feed input component connected to the feed structure on the first active element and the feed structure on the second active element. The feed input component is used for inputting feed to the dual-polarized reflector 130, the dual-polarized active element 120 and the dual-polarized director 110 in the dual-polarized inverted yagi antenna 12, so that the dual-polarized inverted yagi antenna 12 can receive the feed to normally work.

Further, in one embodiment, the feed input assembly is disposed at the distal end of the antenna axial rod 140. It is understood that in other embodiments, the feed input component may also be disposed at the ground-proximal end of the antenna axial rod 140.

Further, in an embodiment, referring to fig. 5 and 6, the feeding input assembly includes a coaxial feeding line 500, the coaxial feeding line 500 connects the feeding structure on the first active element and the feeding structure on the second active element, wherein the dual-polarized active element 120 includes the first active element and the second active element. The coaxial feed line 500 may be a 50 ohm coaxial line, corresponding to the input impedance of the dual polarized inverted yagi antenna 12 being 50 ohms. By adopting the coaxial feed line 500 to provide a feed structure for feeding the first active oscillator and the second active oscillator, an impedance converter is not needed, and the feed cost is saved.

In another embodiment, reference may be made to fig. 13 and 14, where fig. 13 differs from fig. 5 in the structure of the feed input assembly and, correspondingly, fig. 14 differs from fig. 6 in the structure of the feed input assembly, which feed input assembly comprises a balun feed 600, the balun feed 600 connecting the feed structure on the first active element and the feed structure on the second active element. The dual-polarized active oscillator 120 includes a first active oscillator and a second active oscillator. The balun feed device 600 is a balun, and balanced feeding of the antenna element can be realized by the balun feed device 600.

In one embodiment, the antenna axial rod 140 is a square rod, and the antenna axial rod 140 is a metal support rod, which may be a circular rod, a square rod, a rail, or the like, and is used for mounting the antenna components.

Further, in an embodiment, the antenna axial rod 140 includes a first feeding assembly plate, a second feeding assembly plate, a third feeding assembly plate, and a fourth feeding assembly plate, and the first feeding assembly plate, the second feeding assembly plate, the third feeding assembly plate, and the fourth feeding assembly plate surround to form a cavity, and a dielectric strip is disposed in the cavity. The dielectric strip can be made of inorganic ceramic materials or organic dielectric materials, and the cross sectional area of the dielectric strip is equal to that of the cavity, so that the dielectric strip can be conveniently fixed in the cavity, and the working stability is improved. By arranging the dielectric strips in the cavity, the Hansen-Wood's end fire condition can be realized, a strong end fire array is formed, the dielectric constants of all layers of oscillators are different, and the strong end fire array is formed, so that the purpose of improving the gain of the antenna is realized. It is understood that the above dual-polarized reflector 130, dual-polarized active element 120 and dual-polarized director 110 are connected to the above feeding assembly plate and thus fixed to the antenna axial rod 140, for example, the dual-polarized reflector 130 may be connected to four assembly plates, i.e., a first feeding assembly plate, a second feeding assembly plate, a third feeding assembly plate and a fourth feeding assembly plate, simultaneously, or only the first feeding assembly plate and the third feeding assembly plate, so as to be fixed to the antenna axial rod 140.

In one embodiment, as shown in fig. 15, the radio frequency transceiver 2 further includes a power amplifier 25 and a low noise amplifier 26, the circulator 22 is connected to the low noise amplifier 26, and the low noise amplifier 26 is connected to the receiver 24; circulator 22 is connected to power amplifier 25, and power amplifier 25 is connected to transmitter 23. Specifically, the antenna device 1 is connected with the filter 21, the filter 21 is respectively connected with the power amplifier 25 and the low noise amplifier 26 through the circulator 22, the power amplifier 25 is connected with the transmitter 23, the low noise amplifier 26 is connected with the receiver 24, and a signal transmitting channel and a signal receiving channel are respectively formed, so that the formed antenna radio frequency front-end device realizes maximum transmitting and receiving gains, and effectively improves the utilization efficiency of space. The antenna device 1 is a three-dimensional structure, so that a three-dimensional array is formed, and the original two-dimensional antenna is configured into a three-dimensional antenna radio frequency front-end device, so that single beam configuration with maximum gain can be realized.

In this embodiment, the power amplifier 25 and the low noise amplifier 26 are respectively added in the signal transmitting channel and the signal receiving channel, and the signal to be transmitted is power-amplified to improve the transmitting power, and the received signal is amplified for subsequent signal processing, so that the communication reliability of the antenna radio frequency front end device is improved. In addition, each device in the radio frequency transceiver 2 transmits signals through optical fibers, so that the signal transmission speed is high, the loss is small, the anti-interference capability is high, and the communication reliability of the system can be further improved.

Furthermore, in one embodiment, the antenna rf front-end device further comprises a control device, which is connected to the receiver 24 and the transmitter 23. Specifically, the Control device may employ an MCU (Micro Control Unit). By controlling the signal reception and transmission of the antenna device 1 by the control device, the communication reliability of the antenna system is improved.

Above-mentioned antenna radio frequency front end device, at first adopt the cross structure to realize the dual polarization constitution of two single polarization antenna element, reducible signal polarization loss, the gain that makes antenna device's horizontal perpendicular bi-directional is all good, and through dual polarization inverted yagi antenna, make the radiation direction of dual polarization inverted yagi antenna towards ground, thereby make ground can be with the whole reflection of the energy of radiating back, the dorsad radiation of antenna has been reduced, antenna device's whole gain has been improved, secondly through constitute the antenna array setting with dual polarization inverted yagi antenna on the base plate, with antenna device design for three-dimensional array structure of group, make antenna device can form the perpendicular wave beam, realize the receiving and dispatching of signal by radio frequency transceiver at last, thereby antenna whole gain has been improved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. An antenna radio frequency front end device, comprising: a radio frequency transceiver and an antenna device;

the antenna device comprises a substrate and two or more than two dual-polarized inverted yagi antennas; each dual-polarized inverted yagi antenna is arranged on the substrate, the radio frequency transceiver comprises a filter, a circulator, a receiver and a transmitter, the dual-polarized inverted yagi antenna is connected with the filter, the filter is connected with the circulator through an optical fiber, and the circulator is respectively connected with the receiver and the transmitter through the optical fiber;

the dual-polarized inverted yagi antenna comprises an antenna axial rod, a dual-polarized reflector, a dual-polarized active oscillator and a dual-polarized director;

the dual-polarized director, the dual-polarized active oscillator and the dual-polarized reflector are sequentially arranged on the antenna axial rod; the dual-polarized director is arranged at the near ground end of the antenna axial rod, and the dual-polarized reflector is arranged at the far ground end of the antenna axial rod; the near-ground end of the antenna axial rod is used for grounding, and the far-ground end of the antenna axial rod is far away from the ground;

the dual-polarized director comprises a first director and a second director which are orthogonally arranged, the first director and the second director comprise a plurality of metal pieces arranged on the axial rod of the antenna, each metal piece is perpendicular to the axial rod of the antenna, a vertical foot is superposed with the midpoint of each metal piece, the length of each metal piece is shorter than that of the adjacent metal piece close to the dual-polarized active oscillator, and when the first director and the second director orthogonally form the dual-polarized director, every two metal pieces with the same length are kept orthogonal and are positioned in the same plane;

the dual-polarized reflector comprises a first reflector and a second reflector which are orthogonally arranged, the first reflector and the second reflector respectively comprise a metal piece arranged on two sides of the axial rod of the antenna, the metal piece of the dual-polarized reflector is perpendicular to the axial rod of the antenna, a foot is coincided with the midpoint of the metal piece, the first reflector and the first director are positioned in the same plane, the second reflector and the second director are positioned in the same plane, and the length of the metal piece of the dual-polarized reflector is longer than that of any metal piece of the dual-polarized director;

the dual-polarized active oscillator comprises two single-polarized active oscillators, namely a first active oscillator and a second active oscillator, which are orthogonally arranged, wherein the first active oscillator and the second active oscillator are respectively composed of two L-shaped metal pieces symmetrically arranged on two sides of an antenna axial rod, one arm of each L-shaped metal piece is a connecting arm and is attached to the antenna axial rod, a port of each connecting arm is connected with the dual-polarized reflector, the other arm of each L-shaped metal piece is a functional arm, and the length of each functional arm is longer than that of the director and shorter than that of the reflector; meanwhile, the first active oscillator and the first reflector are in the same plane, and the second active oscillator and the second reflector are in the same plane.

2. The antenna radio frequency front end device according to claim 1, wherein dual polarized inverted yagi antennas of different frequency bands are arranged crosswise on the substrate.

3. The antenna radio frequency front end device according to claim 1, wherein the dual-polarized inverted yagi antenna further comprises a reflector plate disposed at a ground-proximal end of the antenna axial rod.

4. The antenna radio frequency front end device according to claim 3, wherein the dual-polarized inverted yagi antenna further comprises an antenna housing, the antenna housing is a cavity structure with one end open and the other end closed, and the open end is fixed on the reflector plate.

5. The antenna radio frequency front end arrangement of claim 1, wherein the dual polarized active element further comprises a feed structure disposed on the first active element and a feed structure disposed on the second active element, each of the feed structures comprising:

the metal bump is arranged on one functional arm and used for receiving feed;

a coaxial line, one end port of which is connected with the metal bump and is used for transmitting current to the single-polarization active oscillator to drive the antenna to work;

the supporting piece is coated outside the coaxial line and used for isolating the coaxial line from the external environment;

and the metal shell is arranged outside the supporting piece, and meanwhile, one part of the metal shell is embedded into the functional arm without the metal lug.

6. The antenna radio frequency front end arrangement of claim 5, wherein the dual polarized inverted yagi antenna further comprises a feed input assembly connected to a feed structure on the first active element and a feed structure on the second active element.

7. The antenna radio frequency front end device of claim 6, wherein the feed input component is disposed at a distal end of the antenna axial rod.

8. The antenna radio frequency front end device of claim 7, wherein the feed input component comprises a coaxial feed line connecting the feed structure on the first active element and the feed structure on the second active element.

9. The antenna radio frequency front end arrangement of claim 7, wherein the feed input component comprises a balun feed arrangement connecting a feed structure on the first active element and a feed structure on the second active element.

10. The antenna radio-frequency front end device according to claim 1, wherein the antenna axial rod includes a first feed assembly plate, a second feed assembly plate, a third feed assembly plate, and a fourth feed assembly plate, the first feed assembly plate, the second feed assembly plate, the third feed assembly plate, and the fourth feed assembly plate surround to form a cavity, and a dielectric strip is disposed in the cavity.

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