Three-dimensional RF front-end device

Abstract

The present application relates to a three-dimensional radio frequency front-end device, including an antenna device and a radio frequency transceiver device, the number of the radio frequency transceiver devices is two or more, and each radio frequency transceiver device is respectively connected to a corresponding dual-polarization inverse logarithmic periodic antenna. The three-dimensional radio frequency front-end device first forms a dual-polarization inverse logarithmic periodic antenna by inversion, so that the radiation direction of the dual-polarization inverse logarithmic periodic antenna is toward the ground, so that the ground can reflect all the radiated energy back, reduce the back radiation of the antenna, and improve the overall gain of the dual-polarization inverse logarithmic periodic antenna. Secondly, the dual-polarization inverse logarithmic periodic antenna is formed into an antenna array and arranged on a substrate, and the antenna device is designed as a three-dimensional array structure, so that the antenna device can form a vertical plane beam, and finally connected to the corresponding radio frequency transceiver device, and the corresponding radio frequency transceiver device is used to manage the signal transmission and reception of the antenna device, thereby improving the overall gain of the antenna.

Description

Technical Field

[0001] The present application relates to the field of antenna communication technology, and in particular to a three-dimensional radio frequency front-end device. Background Art

[0002] Antennas are an essential component of any radio communication system. Although the tasks to be performed by various types of radio equipment are different, the role of antennas in the equipment is basically the same. Any radio equipment transmits information through radio waves, so it must have a device that can radiate or receive electromagnetic waves.

[0003] The RF front end of the traditional antenna system is mainly composed of single-polarized antennas, and there are also array antennas, but they are mainly vertical arrays. These antenna structures are all two-dimensional settings, and it is difficult to achieve high gain. The traditional antenna system has limited improvement on communication performance and poor gain effect. Summary of the invention

[0004] Based on this, it is necessary to provide a three-dimensional RF front-end device to address the problem of poor gain effect of traditional antenna systems.

[0005] A three-dimensional radio frequency front-end device, comprising an antenna device and a radio frequency transceiver device, the antenna device comprising a substrate and two or more dual-polarization inverse logarithmic periodic antennas, each dual-polarization inverse logarithmic periodic antenna is arranged on the substrate, the radio frequency transceiver device comprises a filter, a circulator, a receiver and a transmitter, the dual-polarization inverse logarithmic periodic antenna is connected to the filter, the filter is connected to the circulator through an optical fiber, and the circulator is respectively connected to the receiver and the transmitter through the optical fiber; the number of the radio frequency transceiver devices is two or more, and each radio frequency transceiver device is respectively connected to a corresponding dual-polarization inverse logarithmic periodic antenna;

[0006] Dual-polarization reciprocal logarithmic periodic antenna, including:

[0007] The antenna body comprises four identical set lines arranged in sequence around a space axis, namely, a first set line, a second set line, a third set line, and a fourth set line. The first set line and the third set line are arranged opposite to each other, and the second set line and the fourth set line are arranged opposite to each other. The line between the midpoint of the first set line and the midpoint of the third set line is perpendicular to the line between the midpoint of the second set line and the midpoint of the fourth set line, and the foot of the perpendicular is on the space axis. The first set line, the second set line, the third set line, and the fourth set line all comprise a near-ground end close to the ground and a far-ground end far from the ground. A plurality of antenna elements are arranged on the first set line. The antenna elements are alternately arranged at equal intervals on both sides of the first set line relative to the direction of the space axis from the near-ground end to the far-ground end of the first set line. The closer the antenna element is to the near-ground end of the first set line, the shorter its length is. All antenna elements on the first set line are parallel to each other and are in the same plane. A plurality of antenna elements are also arranged on the second set line, the third set line, and the fourth set line, respectively. The arrangement method is the same as that of the antenna element of the first set line.

[0008] The first coaxial line and the second coaxial line are respectively arranged on the first collective line and the second collective line, and include a coaxially arranged inner conductor, an insulating medium layer, and an outer conductor layer, wherein the insulating medium layer is arranged between the inner conductor and the outer conductor layer, and the outer conductor layers of the first coaxial line and the second coaxial line are respectively attached to the side of the first collective line and the second collective line away from the spatial axis;

[0009] The near-ground ends of the first and second collective wires are also provided with a first through hole and a second through hole, respectively. The shapes and sizes of the first through hole and the second through hole are respectively adapted to the first coaxial line and the second coaxial line. The output ends of the first coaxial line and the second coaxial line are respectively connected to the first through hole and the second through hole, and the inner conductors of the first coaxial line and the second coaxial line respectively pass through the first through hole and the second through hole to be connected to the third and fourth collective wires.

[0010] The above-mentioned three-dimensional RF front-end device first adopts a cross-shaped structure to realize the dual-polarization structure of two single-polarization antenna units, realizes a dual-polarization and inverted dual-polarization inverse logarithmic periodic antenna, which can reduce signal polarization loss and make the antenna device have excellent gain in both horizontal and vertical directions. The dual-polarization inverse logarithmic periodic antenna is formed by inversion, so that the radiation direction of the dual-polarization inverse logarithmic periodic antenna is toward the ground, so that the ground can reflect all the radiated energy back, reducing the back radiation of the antenna and improving the overall gain of the dual-polarization inverse logarithmic periodic antenna. Secondly, the dual-polarization inverse logarithmic periodic antenna is composed of an antenna array and arranged on a substrate, and the antenna device is designed as a three-dimensional array structure, so that the antenna device can form a vertical plane beam, and finally connected to the corresponding RF transceiver, and the corresponding RF transceiver is used to manage the signal transmission and reception of the antenna device, thereby improving the overall gain of the antenna.

[0011] In one embodiment, dual-polarization inverse log periodic antennas of different frequency bands are cross-arranged on the substrate, and dual-polarization inverse log periodic antennas of the same frequency band are respectively connected to the same radio frequency transceiver.

[0012] In one of the embodiments, the dual-polarization reciprocal log periodic antenna further includes:

[0013] A third coaxial line, disposed on a third set line, and symmetrical with the first coaxial line about the spatial axis;

[0014] The fourth coaxial line is arranged on the fourth set line and is symmetrical with the second coaxial line about the space axis.

[0015] In one embodiment, the input impedance of the first antenna single-polarization structure composed of the first set of lines, the third set of lines, and the first coaxial line, the third coaxial line, and the antenna element arranged on the first set of lines and the third set of lines, and the input impedance of the second antenna single-polarization structure composed of the second set of lines, the fourth set of lines, and the second coaxial line, the fourth coaxial line, and the antenna element arranged on the second set of lines and the fourth set of lines are both 50 ohms.

[0016] In one embodiment, the first coaxial line, the second coaxial line, the third coaxial line and the fourth coaxial line are 50-ohm coaxial lines.

[0017] In one embodiment, the opening height of the first through hole is higher than the opening height of the second through hole.

[0018] In one embodiment, the dual-polarization reciprocal log periodic antenna further includes a dielectric strip, and the dielectric strip is disposed in a region surrounded by the first set of lines, the second set of lines, the third set of lines, and the fourth set of lines.

[0019] In one embodiment, the length of the dielectric strip matches the length of the first set of lines, the second set of lines, the third set of lines, and the fourth set of lines.

[0020] In one embodiment, the dual-polarization reciprocal log periodic antenna further includes more than two balanced-unbalanced transformers, each balanced-unbalanced transformer is respectively connected to a different set of lines among the first set of lines, the second set of lines, the third set of lines, and the fourth set of lines.

[0021] In one of the embodiments, the dual-polarization reciprocal log periodic antenna further includes a reflector, which is disposed at a near-ground end of the antenna body, and the antenna body is grounded through the reflector. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a structural block diagram of a three-dimensional radio frequency front-end device in an embodiment;

[0023] Figure 2is a structural diagram of an antenna device in one embodiment;

[0024] Figure 3 A schematic diagram of the distribution of dual-polarization reciprocal logarithmic periodic antennas in one embodiment;

[0025] Figure 4 A schematic diagram of the distribution of dual-polarization reciprocal logarithmic periodic antennas in another embodiment;

[0026] Figure 5 A schematic diagram of the specific structure of a dual-polarization reciprocal logarithmic periodic antenna in one embodiment;

[0027] Figure 6 It is a partial schematic diagram of the coaxial line wire structure in the dual-polarization reciprocal log periodic antenna in one embodiment;

[0028] Figure 7 A cross-sectional view of a dual-polarization reciprocal logarithmic periodic antenna in one embodiment in one direction;

[0029] Figure 8 A top view of a dual-polarization reciprocal log periodic antenna in one embodiment;

[0030] Fig. 9 A schematic diagram of the single-polarization structure of an antenna in an embodiment;

[0031] Fig.10 A schematic diagram of the structure of a dual-polarization reciprocal logarithmic periodic antenna in another embodiment;

[0032] Fig.11 FIG. 4 is a structural block diagram of a three-dimensional RF front-end device in another embodiment. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0034] In one embodiment, a stereoscopic radio frequency front-end device is provided, such as Figure 1 and Figure 2As shown, it includes an antenna device 1 and a radio frequency transceiver device 2. The antenna device 1 includes a substrate 11 and two or more dual-polarization inverse logarithmic periodic antennas 12. Each dual-polarization inverse logarithmic periodic antenna 12 is arranged on the substrate 11. The radio frequency transceiver device 2 includes a filter 21, a circulator 22, a transmitter 23 and a receiver 24. The dual-polarization inverse logarithmic periodic antenna 12 is connected to the filter 21. The filter 21 is connected to the circulator 22 through an optical fiber. The circulator 22 is respectively connected to the receiver 24 and the transmitter 23 through optical fibers. The number of the radio frequency transceiver devices 2 is two or more, and each radio frequency transceiver device 2 is respectively connected to the corresponding dual-polarization inverse logarithmic periodic antenna 12. Specifically, the dual-polarization inverse log periodic antenna 12 is vertically arranged on the substrate 11. Since the number of dual-polarization inverse log periodic antennas 12 and radio frequency transceiver devices 2 is two or more, there is a corresponding relationship when they are connected. For example, one radio frequency transceiver device 2 can be connected to only one dual-polarization inverse log periodic antenna 12, or one radio frequency transceiver device 2 can be connected to multiple dual-polarization inverse log periodic antennas 12 at the same time, or one dual-polarization inverse log periodic antenna 12 can be connected to multiple radio frequency transceiver devices 2 at the same time, which can facilitate the management of signal reception and transmission. Furthermore, the material of the substrate 11 is not unique, and it can be a metal plate or a plastic plate. In the present embodiment, the substrate 11 is a metal substrate to improve the reliability of antenna fixing. The frequency bands of different dual-polarization inverse log periodic antennas 12 can be the same or different. In the present embodiment, dual-polarization inverse log periodic antennas 12 of different frequency bands are cross-arranged on the substrate 11. Figure 3 As shown, the dual-polarized inverse logarithmic periodic antenna 12 includes a frequency band 1 antenna and a frequency band 2 antenna, and the antennas of the two different frequency bands are cross-arranged. The specific structural dimensions of the dual-polarized inverse logarithmic periodic antennas 12 of different frequency bands are also different, such as Figure 4 The figure shows a high-gain interleaved array diagram between dual-polarized inverse logarithmic periodic antennas 12 of different frequency bands. The antenna of frequency band 1 is a low-frequency antenna with a higher height, and the antenna of frequency band 2 is a high-frequency antenna with a lower height. It should be noted that the dual-polarized inverse logarithmic periodic antennas of the same frequency band are connected to the same RF transceiver. For example, there are two RF transceiver devices, namely RF transceiver A and RF transceiver B. The number of dual-polarized inverse logarithmic periodic antennas of frequency band 1 is two, and the number of dual-polarized inverse logarithmic periodic antennas of frequency band 2 is also two. Then, the two dual-polarized inverse logarithmic periodic antennas of frequency band 1 are both connected to RF transceiver A, and the two dual-polarized inverse logarithmic periodic antennas of frequency band 2 are both connected to RF transceiver B. The dual-polarization inverse logarithmic periodic antennas 12 of different frequency bands are placed crosswise, which increases the distance between the two dual-polarization inverse logarithmic periodic antennas 12, indirectly increases the effective aperture area, and improves the antenna gain. At the same time, the dual-polarization inverse logarithmic periodic antennas 12 of different frequency bands are respectively connected to different RF transceiver devices 1, which can avoid signal confusion and facilitate signal sending and receiving of the RF transceiver device 1.

[0035] For further information, please refer to Figure 5 , Figure 5 Detailed structure of the dual-polarization inverse logarithmic periodic antenna 12 is shown in FIG. 1 , which includes an antenna body 110 , an antenna element 120 , a first coaxial line 130 , and a second coaxial line 140 .

[0036] The antenna body 110 includes four identical collective lines, namely, the first collective line 111, the second collective line 112, the third collective line 113, and the fourth collective line 114. The four collective lines are arranged in sequence around a spatial axis, wherein the first collective line 111 is arranged opposite to the third collective line 113, and the second collective line 112 is arranged opposite to the fourth collective line 114. At the same time, the line connecting the midpoint of the first collective line 111 and the midpoint of the third collective line 113 is perpendicular to the line connecting the midpoint of the second collective line 112 and the midpoint of the fourth collective line 114, and is perpendicular to the spatial axis, that is, the four collective lines are not uneven, but are arranged to keep the length aligned, so that the antenna can keep the structure relatively symmetrical and stable as much as possible.

[0037] A plurality of antenna elements 120 are respectively arranged on the first collection line 111, the second collection line 112, the third collection line 113, and the fourth collection line 114. The antenna element 120 can be a metal strip or a metal rod, as well as metal parts of other shapes. The two ends of each collection line are respectively called the near-ground end and the far-ground end. The near-ground end is close to the ground, and the far-ground end is far from the ground. The plurality of antenna elements 120 on any collection line are alternately arranged at equal intervals on both sides of the collection line relative to the spatial axis in the direction from the near-ground end of the collection line to the far-ground end, that is, they are alternately arranged at equal intervals from the left to the right along the direction from the bottom to the top, and the closer the antenna element is to the near-ground end, the shorter it is. At the same time, the plurality of antenna elements 120 on the same collection line are parallel to each other and are in the same plane. The closer the antenna element 120 is to the near-ground end of the first collection line 111, the shorter the length is. The antenna body 110 can be grounded at its near-ground end and the antenna can be fed inverted so that the antenna radiates toward the ground. Ideally, the ground plane is equivalent to an infinitely large plane, so that all the energy is reflected back in the forward direction through the ground, reducing the back radiation of the antenna and improving the overall gain of the antenna.

[0038] The first coaxial line 130 and the second coaxial line 140 are respectively disposed on the first set of lines 111 and the second set of lines 112. Figure 6As shown, the first coaxial line 130 and the second coaxial line 140 both include a coaxially arranged inner conductor 131, an insulating medium layer 132 and an outer conductor layer 133, and the insulating medium layer 132 is arranged between the inner conductor 131 and the outer conductor layer 133 to ensure that they do not contact each other. When arranged, the outer conductor layers 133 of the first coaxial line 130 and the second coaxial line 140 are respectively attached to the outer sides of the first collective line 111 and the second collective line 112 away from the spatial axis to generate a potential difference.

[0039] For further information, see Figure 7 The near-ground ends of the first collective line 111 and the second collective line 112 are respectively provided with a first through hole 150 and a second through hole 160. The shapes and sizes of the first through hole 150 and the second through hole 160 can be adapted to the first coaxial line 130 and the second coaxial line 140, and can also be larger or smaller than the cross-section of the coaxial line. The coaxial line arranged on the collective line can connect the output end to the through hole on the collective line where it is located. Furthermore, the inner conductor of the collective line connected to the through hole can continue to extend and pass through the through hole to be connected to the collective line opposite to the collective line where the coaxial line is located, so as to form a feeding structure. For example, the output end of the second coaxial line 140 arranged on the second collective line 112 is connected to the second through hole 160, and at the same time, the inner conductor of the output end of the second coaxial line 140 further extends through the second through hole 160 to be connected to the fourth coaxial line 114. The arrangement of the first collective line 111 and the first coaxial line 130 is the same, which will not be repeated here.

[0040] In one embodiment, the shape of each set of wires constituting the antenna body 110 is a rectangular parallelepiped to facilitate the installation of components such as the antenna element and the coaxial line.

[0041] like Figure 5 and Figure 8 As shown, in one embodiment, the dual-polarization inverse logarithmic periodic antenna 12 further includes a third coaxial line 170 and a fourth coaxial line 180, which are respectively arranged on the third set line 113 and the fourth set line 114, and the third coaxial line 170 is symmetrical with the first coaxial line 130 about the aforementioned spatial axis, and the fourth coaxial line 180 is symmetrical with the second coaxial line 140 about the aforementioned spatial axis. In one embodiment, the third coaxial line 170 can also be equal in length to the first coaxial line 130, and the fourth coaxial line 180 can be equal in length to the second coaxial line 140. In another embodiment, the third coaxial line 170 is the same as the first coaxial line 130, and the fourth coaxial line 180 is the same as the second coaxial line 140. By providing a coaxial line symmetrical to the first coaxial line 130 and the second coaxial line 140, the structural symmetry of the dual-polarization inverse logarithmic periodic antenna 12 can be ensured, thereby ensuring the symmetry of the antenna radiation characteristics and improving the antenna performance.

[0042] like Fig. 9As shown, in one embodiment, the input impedance of the first antenna single-polarization structure composed of the first set line 111, the third set line 113, the first coaxial line 130, the third coaxial line 170, and the antenna vibrator arranged on the first set line 111 and the third set line 113 is 50 ohms. In addition, the input impedance of the second antenna single-polarization structure composed of the second set line 112, the fourth set line 114, the second coaxial line 140, the fourth coaxial line 180, and the antenna vibrator arranged on the second set line 112 and the fourth set line 114 is also 50 ohms. The dual-polarization inverse logarithmic periodic antenna 12 does not require an impedance transformer and can be directly fed by a 50-ohm coaxial line, which is convenient, stable, and has strong adaptability. The top feeding adopts coaxial feeding, and the coaxial feeding is closely connected to the set line. At the same time, coaxial feeding can also be performed at the bottom of the set line. Furthermore, in one embodiment, the first coaxial line 130 , the second coaxial line 140 , the third coaxial line 170 , and the fourth coaxial line 180 are all 50-ohm coaxial lines.

[0043] In one embodiment, the first through hole 150 is located closer to the top than the second through hole 160 so that the inner conductors of the first coaxial line 130 and the second coaxial line 140 do not overlap when connected to the third and fourth collective lines 113 and 114 respectively, thereby avoiding interference.

[0044] In one embodiment, the dual-polarized inverse logarithmic periodic antenna 12 also includes a dielectric strip, which is arranged in the area formed by the first set of lines 111, the second set of lines 112, the third set of lines 113 and the fourth set of lines 114. The size of the dielectric strip is not unique. In this embodiment, the cross-sectional area of ​​the dielectric strip is equal to the cross-sectional area of ​​the area formed by the first set of lines 111, the second set of lines 112, the third set of lines 113 and the fourth set of lines 114, so that the dielectric strip is fixed and the working stability is improved. The length of the dielectric strip can be equal to the distance between the antenna vibrators 120 at both ends of the same set of lines, and the material will not be wasted while ensuring the working effect. The dual-polarized inverse logarithmic periodic antenna 12 uses a quasi-periodic model, the vibrators are not crossed, the array elements are each pair of vibrators, and the four pairs of vibrators are dual-polarized. The length of each layer of vibrators is different, so as to achieve a wider bandwidth, and the array element spacing is also different. The Hansen-Woodyard end-fire condition is achieved by adding a dielectric strip in the middle of the feed assembly plate. The dielectric constants of the dielectric strips between each layer of oscillators are different, forming a strong end-fire array, thereby achieving the purpose of improving the gain of the antenna itself.

[0045] In one embodiment, see Fig.10, the dual-polarization inverse log periodic antenna 12 also includes more than two balanced-unbalanced transformers 210, and each balanced-unbalanced transformer 210 is respectively connected to a different set of lines among the first set of lines 111, the second set of lines 112, the third set of lines 113 and the fourth set of lines 114. Specifically, in this embodiment, taking the dual-polarization inverse log periodic antenna 12 including the first balanced-unbalanced transformer and the second balanced-unbalanced transformer as an example, the port of the first balanced-unbalanced transformer is connected to the first set of lines 111, and the port of the second balanced-unbalanced transformer is connected to the second set of lines 112. Furthermore, the port of the balanced-unbalanced transformer connected to the set of lines can be further extended to be connected to the set of lines opposite to the connected set of lines to form a feeding structure. The connection relationship between other balanced-unbalanced transformers and set of lines can be inferred in turn, and will not be repeated here. The setting position of the balanced-unbalanced transformer 210 is not unique. In the present embodiment, each balanced-unbalanced transformer 210 is set at the near-ground end of the antenna body. The antenna body can realize balanced feeding of the antenna element by adopting more than two balanced-unbalanced transformers 210 to form a feeding structure, thereby improving the working performance of the dual-polarization inverse log periodic antenna 12.

[0046] In one embodiment, see Fig.10 , the dual-polarization inverse logarithmic periodic antenna 12 may also include a reflector 220 disposed at the near-ground end of the antenna body 110. Specifically, the near-ground end of the antenna body 110 is an end close to the ground. Further, when the dual-polarization inverse logarithmic periodic antenna 12 includes a balanced-unbalanced transformer 210, the antenna body 110 is disposed on the reflector 220 through the balanced-unbalanced transformer 210, and the reflector 220 is disposed on the ground. By providing the reflector 220, the backward beam of the antenna can be converged and reflected through the reflector 220, thereby effectively improving the front-to-back ratio of the antenna, and also having a certain effect on improving the antenna gain and directivity, thereby improving the antenna performance.

[0047] In one embodiment, Fig.11 As shown, the RF transceiver 2 also 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 . The circulator 22 is connected to the power amplifier 25 , and the power amplifier 25 is connected to the transmitter 23 .

[0048] Specifically, for ease of explanation, a single Represents a dual-polarized inverse logarithmic periodic antenna 12. The antenna device 1 includes multiple dual-polarized inverse logarithmic periodic antennas 12, which are connected to corresponding filters 21. The filters 21 are connected to power amplifiers 25 and low-noise amplifiers 26 through circulators 22, respectively. The power amplifier 25 is connected to a transmitter 23, and the low-noise amplifier 26 is connected to a receiver 24, respectively forming a signal transmission channel and a signal reception channel. The three-dimensional RF front-end device formed achieves the maximum transmission and reception gain, effectively improving the utilization efficiency of the space. Since the antenna device 1 is a three-dimensional structure, the three-dimensional array formed configures the original two-dimensional antenna into a three-dimensional three-dimensional RF front-end device, which can achieve a single-beam configuration with maximum gain.

[0049] Further, Fig.11 For example, the number of dual-polarization inverse logarithmic periodic antennas 12 respectively connected to each RF transceiver 2 can be completely the same, partially the same, or completely different. Each RF transceiver 2 is connected to the corresponding dual-polarization inverse logarithmic periodic antenna 12 to form a signal transceiver channel, forming a multi-input and multi-output RF front-end structure. In one embodiment, the number of dual-polarization inverse logarithmic periodic antennas 12 respectively connected to each RF transceiver 2 is different from each other. For example, the number of dual-polarization inverse logarithmic periodic antennas 12 connected to each RF transceiver 2 can be successively increased, and the corresponding signal transceiver channel can be selected according to actual needs, thereby improving the operational convenience of the antenna system.

[0050] In this embodiment, a power amplifier 25 and a low noise amplifier 26 are added to the signal transmission channel and the signal receiving channel respectively, the signal to be transmitted is power amplified to increase the transmission power, and the received signal is amplified for subsequent signal processing, thereby improving the communication reliability of the three-dimensional RF front-end device. In addition, each device in the RF transceiver 2 transmits signals through optical fibers, and the signal transmission speed is fast, the loss is small, and the anti-interference ability is strong, which can further improve the communication reliability of the system.

[0051] In addition, in one embodiment, the three-dimensional RF front-end device further includes a control device, which is connected to the receiver 24 and the transmitter 23. Specifically, the control device can be an MCU (Micro Control Unit). The control device controls the signal reception and transmission of the antenna device 1, thereby improving the communication reliability of the antenna system.

[0052] The above-mentioned three-dimensional RF front-end device first adopts a cross-shaped structure to realize the dual-polarization structure of two single-polarization antenna units, realizes a dual-polarization and inverted dual-polarization inverse logarithmic periodic antenna, which can reduce signal polarization loss and make the antenna device have excellent gain in both horizontal and vertical directions. The dual-polarization inverse logarithmic periodic antenna is formed by inversion, so that the radiation direction of the dual-polarization inverse logarithmic periodic antenna is toward the ground, so that the ground can reflect all the radiated energy back, reducing the back radiation of the antenna and improving the overall gain of the dual-polarization inverse logarithmic periodic antenna. Secondly, the dual-polarization inverse logarithmic periodic antenna is composed of an antenna array and arranged on a substrate, and the antenna device is designed as a three-dimensional array structure, so that the antenna device can form a vertical plane beam, and finally connected to the corresponding RF transceiver, and the corresponding RF transceiver is used to manage the signal transmission and reception of the antenna device, thereby improving the overall gain of the antenna.

[0053] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A three-dimensional radio frequency front-end device, characterized in that: It comprises an antenna device and a radio frequency transceiver device, wherein the antenna device comprises a substrate and two or more dual-polarization inverse logarithmic periodic antennas, each of which is vertically arranged on the substrate, and the radio frequency transceiver device comprises a filter, a circulator, a receiver and a transmitter, the dual-polarization inverse logarithmic periodic antenna is connected to the filter, the filter is connected to the circulator through an optical fiber, and the circulator is respectively connected to the receiver and the transmitter through an optical fiber; the number of the radio frequency transceiver devices is two or more, and each of the radio frequency transceiver devices is respectively connected to a corresponding dual-polarization inverse logarithmic periodic antenna; The dual-polarization reciprocal logarithmic periodic antenna comprises: The antenna body comprises four identical set lines arranged in sequence around a space axis, namely, a first set line, a second set line, a third set line, and a fourth set line, wherein the first set line is arranged opposite to the third set line, the second set line is arranged opposite to the fourth set line, a line between a midpoint of the first set line and a midpoint of the third set line is perpendicular to a line between a midpoint of the second set line and a midpoint of the fourth set line, and the foot is perpendicular to the space axis, and the first set line, the second set line, the third set line, and the fourth set line all comprise a near-ground end close to the ground and a far-from-ground end. Far-ground end; a plurality of antenna elements are arranged on the first collection line, and the antenna elements are alternately arranged on both sides of the first collection line relative to the direction of the space axis in a sequence of equal intervals from the near-ground end to the far-ground end of the first collection line, and the closer the antenna element is to the near-ground end of the first collection line, the shorter the length is, and all antenna elements on the first collection line are parallel to each other and are in the same plane; a plurality of antenna elements are also arranged on the second collection line, the third collection line, and the fourth collection line, respectively, and the arrangement method is the same as that of the antenna elements of the first collection line; the antenna body is grounded through the near-ground end; The first coaxial line and the second coaxial line are respectively arranged on the first collective line and the second collective line, and include a coaxially arranged inner conductor, an insulating medium layer, and an outer conductor layer, wherein the insulating medium layer is arranged between the inner conductor and the outer conductor layer, and the outer conductor layers of the first coaxial line and the second coaxial line are respectively attached to the side of the first collective line and the second collective line away from the spatial axis; The near-ground ends of the first and second collective wires are further provided with a first through hole and a second through hole, respectively. The shapes and sizes of the first and second through holes are respectively adapted to the first and second coaxial wires. The output ends of the first and second coaxial wires are respectively connected to the first and second through holes, and the inner conductors of the first and second coaxial wires pass through the first and second through holes, respectively, and are connected to the third and fourth collective wires. The dual-polarized inverse log periodic antenna also includes a dielectric strip, which is arranged in an area surrounded by the first set of lines, the second set of lines, the third set of lines and the fourth set of lines; the length of the dielectric strip matches the length of the first set of lines, the second set of lines, the third set of lines and the fourth set of lines; the length of the dielectric strip is equal to the distance between the antenna elements at both ends arranged on the same set of lines; the dielectric constants of the dielectric strips between each layer of elements are different.

2. The three-dimensional RF front-end device according to claim 1, characterized in that: The dual-polarization inverse logarithmic periodic antennas of different frequency bands are cross-arranged on the substrate, and the dual-polarization inverse logarithmic periodic antennas of the same frequency band are respectively connected to the same radio frequency transceiver.

3. The three-dimensional RF front-end device according to claim 1, characterized in that: The dual-polarization reciprocal logarithmic periodic antenna also includes: A third coaxial line, disposed on the third set line, and symmetrical with the first coaxial line about the space axis; The fourth coaxial line is arranged on the fourth set line and is symmetrical with the second coaxial line about the space axis.

4. The three-dimensional RF front-end device according to claim 3, characterized in that: The input impedance of the first antenna single-polarization structure composed of the first set of lines, the third set of lines, the first coaxial line, the third coaxial line, and the antenna elements arranged on the first set of lines and the third set of lines, and the input impedance of the second antenna single-polarization structure composed of the second set of lines, the fourth set of lines, the second coaxial line, the fourth coaxial line, and the antenna elements arranged on the second set of lines and the fourth set of lines are both 50 ohms.

5. The three-dimensional RF front-end device according to claim 4, characterized in that: The first coaxial line, the second coaxial line, the third coaxial line and the fourth coaxial line are 50-ohm coaxial lines.

6. The three-dimensional RF front-end device according to claim 1, characterized in that: The opening height of the first through hole is higher than the opening height of the second through hole.

7. The three-dimensional RF front-end device according to claim 1, characterized in that: The dual-polarization reciprocal log periodic antenna further includes more than two balanced-unbalanced transformers, and each balanced-unbalanced transformer is respectively connected to a different set of lines among the first set of lines, the second set of lines, the third set of lines, and the fourth set of lines.

8. The three-dimensional RF front-end device according to claim 1, characterized in that: The dual-polarization reciprocal log periodic antenna further includes a reflector, which is disposed at a near-ground end of the antenna body, and the antenna body is grounded through the reflector.

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