3D Enhanced RF Front-End Device

Abstract

The present application relates to a three-dimensional enhanced RF front-end device, including an enhanced antenna device and an RF transceiver device. The enhanced antenna device includes a substrate and two or more dual-polarized log-periodic antennas. The RF transceiver device includes a filter, a circulator, a receiver and a transmitter. In the above-mentioned RF front-end device, an F-B covering layer is provided at the first end of the antenna body. The F-B covering layer can form an F-B resonant cavity with the plane where the second end of the antenna body is located. The electromagnetic waves radiated by the antenna body are superimposed in phase in the resonant cavity, thereby improving the radiation gain of the enhanced dual-polarized log-periodic antenna. By arranging an antenna array composed of dual-polarized log-periodic antennas on a substrate, the enhanced antenna device is designed as a three-dimensional array structure, so that the enhanced antenna device can form a vertical plane beam, and then connected to the corresponding RF transceiver device, and the high-gain antenna device is managed for signal transmission and reception through the corresponding RF transceiver 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 enhanced 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 enhanced RF front-end device to address the problem of poor gain effect of traditional antenna systems.

[0005] A three-dimensional enhanced radio frequency front-end device, comprising an enhanced antenna device and a radio frequency transceiver device, the enhanced antenna device comprising a substrate and two or more dual-polarized logarithmic periodic antennas, each dual-polarized 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-polarized 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-polarized logarithmic periodic antenna;

[0006] Dual-polarized log-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 is perpendicular to the space axis. The first set line, the second set line, the third set line, and the fourth set line all comprise a first end and a second end. 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 space axis in a direction from the first end to the second end of the first set line, and the closer the antenna element is to the second 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, and the arrangement method is the same as that of the antenna element of the first set line.

[0008] An FB covering layer, wherein the FB covering layer is arranged at the first end of the antenna body, and a plane where the FB covering layer is located is perpendicular to the spatial axis;

[0009] 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;

[0010] The second 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 pass through the first through hole and the second through hole, respectively, and are connected to the third and fourth collective wires.

[0011] The above-mentioned three-dimensional enhanced RF front-end device first adopts a cross structure to realize the dual-polarization structure of two single-polarization antenna units, realizes a high-gain dual-polarization logarithmic periodic antenna, can reduce signal polarization loss, and make the antenna device have excellent gain in both horizontal and vertical directions. At the same time, an FB covering layer is arranged at the first end of the antenna body, and the FB covering layer can form an FB resonant cavity with the plane where the second end of the antenna body is located. The electromagnetic waves radiated by the antenna body are superimposed in phase in the resonant cavity, thereby improving the radiation gain of the enhanced dual-polarization logarithmic periodic antenna. Secondly, by arranging an antenna array composed of dual-polarization logarithmic periodic antennas on a substrate, the high-gain antenna device is designed as a three-dimensional array structure, so that the high-gain antenna device can form a vertical plane beam, and finally connected to the corresponding RF transceiver, and the high-gain antenna device is managed by the corresponding RF transceiver to transmit and receive signals, thereby improving the overall gain of the antenna.

[0012] In one embodiment, the number of FB covering layers is more than two, and each FB covering layer is stacked and arranged at the first end of the antenna body.

[0013] In one of the embodiments, the FB covering layer includes a top plate and a patch, and the patch is arranged on a side of the top plate close to the antenna body.

[0014] In one embodiment, the patch is a rectangular patch or a circular patch.

[0015] In one embodiment, dual-polarized log-periodic antennas of different frequency bands are cross-arranged on the substrate, and dual-polarized log-periodic antennas of the same frequency band are respectively connected to the same radio frequency transceiver.

[0016] In one embodiment, the dual-polarized 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.

[0017] In one embodiment, the dual-polarized log-periodic antenna further includes more than two baluns, each balun 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.

[0018] In one embodiment, the dual-polarized log-periodic antenna further comprises:

[0019] A third coaxial line, disposed on a third set line, and symmetrical with the first coaxial line about the spatial axis;

[0020] A fourth coaxial line, disposed on a fourth set line, and symmetrical with the second coaxial line about the spatial axis;

[0021] 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, and the wires of the first coaxial line, the second coaxial line, the third coaxial line, and the fourth coaxial line are 50 ohm coaxial lines.

[0022] In one embodiment, the opening height of the first through hole is higher than the opening height of the second through hole.

[0023] In one of the embodiments, the dual-polarization log-periodic antenna further includes a reflector disposed at the second end of the antenna body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural block diagram of a three-dimensional enhanced radio frequency front-end device in one embodiment;

[0025] Figure 2 is a structural diagram of a reinforced antenna device in one embodiment;

[0026] Figure 3 A schematic diagram of the distribution of dual-polarized log-periodic antennas in one embodiment;

[0027] Figure 4 A schematic diagram of the distribution of dual-polarized log-periodic antennas in another embodiment;

[0028] Figure 5 A schematic diagram of the specific structure of a dual-polarized log-periodic antenna in one embodiment;

[0029] Figure 6 A partial schematic diagram of a coaxial line wire structure in a dual-polarized log-periodic antenna in an embodiment;

[0030] Figure 7 A cross-sectional view of a dual-polarized log-periodic antenna in one embodiment in one direction;

[0031] Figure 8 A top view of a dual-polarized log-periodic antenna in one embodiment;

[0032] Fig. 9 A schematic diagram of the single-polarization structure of an antenna in an embodiment;

[0033] Fig.10 A schematic diagram of the structure of a dual-polarized log-periodic antenna in another embodiment;

[0034] Fig.11 It is a structural block diagram of a three-dimensional enhanced RF front-end device in another embodiment. DETAILED DESCRIPTION

[0035] 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.

[0036] In one embodiment, a three-dimensional enhanced radio frequency front-end device is provided, such as Figure 1 and Figure 2 As shown, it includes an enhanced antenna device 1 and a radio frequency transceiver device 2. The enhanced antenna device 1 includes a substrate 11 and two or more dual-polarization log-periodic antennas 12. Each dual-polarization log-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 log-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 log-periodic antenna 12. Specifically, the dual-polarized log-periodic antenna 12 is vertically arranged on the substrate 11, and since the number of dual-polarized 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-polarized log-periodic antenna 12, or one radio frequency transceiver device 2 can be connected to multiple dual-polarized log-periodic antennas 12 at the same time, or one dual-polarized 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, etc. In this embodiment, the substrate 11 is a metal substrate to improve the reliability of antenna fixing. The frequency bands of different dual-polarized log-periodic antennas 12 can be the same or different. In this embodiment, dual-polarized log-periodic antennas 12 of different frequency bands are cross-arranged on the substrate 11. Figure 3 As shown, the dual-polarized logarithmic periodic antenna 12 includes a band 1 antenna and a band 2 antenna, and the antennas of the two different frequency bands are cross-arranged. The specific structural dimensions of the dual-polarized logarithmic periodic antennas 12 of different frequency bands are also different, such as Figure 4The figure shows a high-gain interleaved array diagram between dual-polarized log-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 log-periodic antennas of the same frequency band are connected to the same RF transceiver. For example, there are two RF transceivers, namely RF transceiver A and RF transceiver B. The number of dual-polarized log-periodic antennas of frequency band 1 is two, and the number of dual-polarized log-periodic antennas of frequency band 2 is also two. Then, the two dual-polarized log-periodic antennas of frequency band 1 are both connected to RF transceiver A, and the two dual-polarized log-periodic antennas of frequency band 2 are both connected to RF transceiver B. The dual-polarized log-periodic antennas 12 of different frequency bands are placed crosswise, which increases the distance between the two dual-polarized log-periodic antennas 12, indirectly increases the effective aperture area, and improves the antenna gain. At the same time, the dual-polarized log-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.

[0037] For further information, please refer to Figure 5 , Figure 5 , the specific structure of the dual-polarized log-periodic antenna 12 is shown, which includes an antenna body 110 , an antenna element 120 , a first coaxial line 130 , a second coaxial line 140 and a FB covering layer 190 .

[0038] 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 the foot 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.

[0039] 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. For the convenience of description, the two ends of each collection line may be referred to as the top and the bottom, respectively. The plurality of antenna elements 120 on any collection line are alternately arranged at equal intervals in sequence from the bottom to the top of the collection line on both sides of the collection line relative to the spatial axis, that is, they are alternately arranged at equal intervals from the bottom to the top, one left and one right, and the closer to the top, the shorter the antenna element. 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.

[0040] The FB cover layer 190 is disposed at the first end of the antenna body 110 , and the plane where the FB cover layer 190 is located is perpendicular to the spatial axis. Specifically, the first end of the antenna body 110 is an end close to the second ends of the first, second, third and fourth wire collections 111 , 112 , 113 and 114 . When the second ends of the first set of wires 111, the second set of wires 112, the third set of wires 113 and the fourth set of wires 114 are on the same plane, any one of the second ends of the first set of wires 111, the second set of wires 112, the third set of wires 113 and the fourth set of wires 114 can be used as the first end of the antenna body 110. When the second ends of the first set of wires 111, the second set of wires 112, the third set of wires 113 and the fourth set of wires 114 are not on the same plane, the highest end among the second ends of the first set of wires 111, the second set of wires 112, the third set of wires 113 and the fourth set of wires 114 can be used as the first end of the antenna body 110. The FB covering layer 190 can be directly set on the first end of the antenna body 110, and can also be set on the first end of the antenna body 110 through a connecting member. The distance between the FB covering layer 190 and the first end of the antenna body 110 can be adjusted according to actual needs.

[0041] The FB covering layer 190 is not set in a unique manner. For example, it can be fixedly set at the first end of the antenna body 110 at the factory or during installation to keep the position fixed, so that the FB covering layer 190 and the antenna body 110 are structurally integrated, which can avoid interference factors during installation and improve working performance. It can also be set at the first end of the antenna body 110 through a connector. The type of connector is not unique, and it can be a foam connector or a connecting column, etc. Further, it can also be detachably fixed to the first end of the antenna body 110 through a connector. The FB covering layer 190 can be installed when needed without being removed, which is convenient to use. When the FB covering layer 190 is damaged and cannot be used, only the FB covering layer 190 can be replaced, which avoids the overall replacement of the dual-polarized log-periodic antenna 12 and saves maintenance costs.

[0042] The FB covering layer 190 is parallel to the plane where the second end of the antenna body 110 is located. Taking the antenna body 110 being set on the ground as an example, the FB covering layer 190 is the reflection surface 1, and the antenna floor is the reflection surface 2. The two planes constitute the FB resonant cavity (Fabry-Perot resonant cavity). The antenna body 110 is in the resonant cavity, and the electromagnetic waves radiated by the antenna vibrator 120 in the antenna body 110 are superimposed in phase in the resonant cavity, thereby improving the radiation gain of the dual-polarized logarithmic periodic antenna 12. The type of FB covering layer 190 is not unique. For example, the FB covering layer 190 can adopt a gradient dielectric constant covering layer. Using different dielectric constants at different positions of the covering layer can make the phase distribution curve more uniform and improve the quality of the electromagnetic waves radiated by the dual-polarized logarithmic periodic antenna 12. The size of the FB covering layer 190 is also not unique. In this embodiment, the thickness of the FB covering layer 190 matches one-fourth of the wavelength of the electromagnetic waves radiated by the antenna vibrator when propagating in the medium of the FB covering layer 190, and the effect of improving the gain is good. It can be understood that in other embodiments, the specific size of the FB covering layer 190 can be adjusted according to actual needs.

[0043] 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 6 As 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.

[0044] See also Figure 7 The tops 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.

[0045] In one embodiment, the number of FB covering layers 190 is more than two, and each FB covering layer 190 is stacked and arranged at the first end of the antenna body 110. Taking the first end of the antenna body 110 as the top of the antenna body 110, the second end of the antenna body 110 as the bottom of the antenna body 110, and the bottom of the antenna body 110 as the near-ground end as an example, stacking multiple FB covering layers 190 on the top of the antenna body 110 can make the electromagnetic waves radiated by the antenna vibrator 120 propagate in the cavity formed by the plane where the multiple FB covering layers 190 and the second end of the antenna body 110 are located. The number of in-phase superposition is greater, and the radiation gain of the dual-polarization log-periodic antenna 12 can be further improved.

[0046] In one embodiment, the FB cover layer 190 includes a top plate and a patch, and the patch is arranged on the side of the top plate close to the antenna body 110. The top plate is a carrier for the patch, which can fix the position of the patch and ensure the normal operation of the patch. The patch is arranged on the top plate and forms a resonant cavity with the plane where the second end of the antenna body 110 is located. The number of patches is not unique. Generally speaking, the more patches there are, the smaller the size of the patch is. The specific selection can be based on actual needs. When the number of FB cover layers 190 is more than two, each FB cover layer 190 is stacked, and the patches on each FB cover layer 190 are respectively arranged on the side of each top plate close to the antenna body 110. The setting direction of each FB cover layer 190 is the same, which is conducive to further improving the gain.

[0047] In one embodiment, the patch is a rectangular patch or a circular patch. The rectangular patch or the circular patch can be regularly arranged on the top plate, and the position and working parameters of the patch can be adjusted more conveniently, thereby improving the convenience of use of the dual-polarized log-periodic antenna 12.

[0048] In one embodiment, a cross-shaped slot is provided on one side of the patch close to the antenna body 110. The cross-shaped slot acts as a meander, which increases the equivalent inductance and significantly reduces the resonant frequency, thereby reducing the size of the FB cover layer 190 while ensuring the working performance. The stronger radiation generated by the cross-shaped slot is equivalent to increasing the loss resistance, thereby greatly improving the bandwidth.

[0049] In one embodiment, the dual-polarized log-periodic antenna 12 further includes a dielectric strip, which is disposed in an 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 well 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 log-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.

[0050] In one embodiment, see Fig.10 The dual-polarized log-periodic antenna 12 further includes more than two balanced-unbalanced transformers 210, each balanced-unbalanced transformer 210 is connected to a different set of lines in 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. It should be noted that Fig.10 Although the specific connection method between the antenna body 110 and the FB covering layer 190 is not shown, in fact, the antenna body 110 and the FB covering layer 190 can be connected by a connector. Specifically, in this embodiment, taking the dual-polarized log-periodic antenna 12 including a first balanced-unbalanced transformer and a second balanced-unbalanced transformer as an example, the port of the first balanced-unbalanced transformer is connected to the first collective line 111, and the port of the second balanced-unbalanced transformer is connected to the second collective line 112. Furthermore, the port of the balanced-unbalanced transformer connected to the collective line can be further extended to connect to the collective line opposite to the connected collective line to form a feeding structure. The connection relationship between other balanced-unbalanced transformers and collective lines can be deduced in turn, and will not be repeated here. Using more than two balanced-unbalanced transformers to form a feeding structure can achieve balanced feeding of the antenna element and improve the working performance of the dual-polarized log-periodic antenna 12.

[0051] 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.

[0052] like Figure 5 and Figure 8As shown, in one embodiment, the dual-polarized log-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-polarized log-periodic antenna 12 can be ensured, thereby ensuring the symmetry of the antenna radiation characteristics and improving the antenna performance.

[0053] like Fig. 9 As 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 log-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. Coaxial feeding is used for top 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.

[0054] In one embodiment, the first through hole 150 is opened 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.

[0055] In one embodiment, see Fig.10The dual-polarized log-periodic antenna 12 may further include a reflector 220 disposed at the second end of the antenna body 110. Specifically, the second end of the antenna body 110 may be the near-ground end, i.e., the bottom end, of the antenna body 110. By providing the reflector 220, the antenna backward beam may 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.

[0056] Furthermore, when multiple dual-polarized log-periodic antennas 12 are used simultaneously and the frequency bands of the dual-polarized log-periodic antennas 12 are different, the dual-polarized log-periodic antennas 12 of different frequency bands are placed crosswise, which indirectly increases the effective aperture area, increases the effective radiation area, and improves the gain.

[0057] 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 .

[0058] Specifically, for ease of explanation, a single Represents a dual-polarized log-periodic antenna 12. The enhanced antenna device 1 includes a plurality of dual-polarized log-periodic antennas 12, which are connected to a filter 21, and the filter 21 is respectively connected to a power amplifier 25 and a low-noise amplifier 26 through a circulator 22, 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, and the composed RF front-end device achieves the maximum transmission and reception gain, and effectively improves the utilization efficiency of the space. Since the enhanced antenna device 1 is a three-dimensional structure, the three-dimensional array formed converts the original two-dimensional antenna into a three-dimensional enhanced RF front-end device, which can achieve a single beam configuration with maximum gain.

[0059] Further, Fig.11 For example, the number of dual-polarized log-periodic antennas 12 respectively connected to each RF transceiver 2 can be exactly the same, partially the same, or completely different. Each RF transceiver 2 is connected to the corresponding dual-polarized log-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-polarized log-periodic antennas 12 respectively connected to each RF transceiver 2 is different from each other. For example, the number of dual-polarized log-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.

[0060] 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 enhanced 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.

[0061] In addition, in one embodiment, the three-dimensional enhanced 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 high-gain antenna device 1, thereby improving the communication reliability of the antenna system.

[0062] The above-mentioned three-dimensional enhanced RF front-end device first adopts a cross structure to realize the dual-polarization structure of two single-polarization antenna units, realizes a high-gain dual-polarization logarithmic periodic antenna, can reduce signal polarization loss, and make the antenna device have excellent gain in both horizontal and vertical directions. At the same time, an FB covering layer is arranged at the first end of the antenna body, and the FB covering layer can form an FB resonant cavity with the plane where the second end of the antenna body is located. The electromagnetic waves radiated by the antenna body are superimposed in phase in the resonant cavity, thereby improving the radiation gain of the enhanced dual-polarization logarithmic periodic antenna. Secondly, by arranging an antenna array composed of dual-polarization logarithmic periodic antennas on a substrate, the high-gain antenna device is designed as a three-dimensional array structure, so that the high-gain antenna device can form a vertical plane beam, and finally connected to the corresponding RF transceiver, and the high-gain antenna device is managed by the corresponding RF transceiver to transmit and receive signals, thereby improving the overall gain of the antenna.

[0063] 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.

[0064] 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 enhanced radio frequency front-end device, characterized in that: It includes a reinforced antenna device and a radio frequency transceiver device, wherein the reinforced antenna device includes a substrate and two or more dual-polarized logarithmic periodic antennas, each of which is arranged on the substrate, and the radio frequency transceiver device includes a filter, a circulator, a receiver and a transmitter, wherein the dual-polarized 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 connected to a corresponding dual-polarization log-periodic antenna respectively; The dual-polarized log-periodic antenna comprises: The antenna body comprises four identical set lines arranged in sequence around a spatial axis, namely, a first set line, a second set line, a third set line, and a fourth set line. The first set line is arranged opposite to the third set line, and the second set line is arranged opposite to the fourth set line. 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 is perpendicular to the spatial axis. The first set line, the second set line, the third set line, and the fourth set line all include a first end and a second end. 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 spatial axis in a direction from the first end to the second end of the first set line, and the closer the antenna element is to the second end of the first set line, the shorter the 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, in the same manner as that of the antenna element of the first set line. An FB covering layer, wherein the FB covering layer is arranged at the first end of the antenna body, a plane where the FB covering layer is located is perpendicular to the spatial axis, and the FB covering layer is parallel to a plane where the second end of the antenna body is located; 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 second 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. The inner conductors of the first and second coaxial wires respectively pass through the first and second through holes and are connected to the third and fourth collective wires. The dual-polarized log-periodic antenna also includes a dielectric strip, which is arranged in an area formed by the first set of lines, the second set of lines, the third set of lines and the fourth set of lines; 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, 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 constant of the dielectric strip is different between each layer of elements.

2. The three-dimensional enhanced RF front-end device according to claim 1, characterized in that: The number of the FB covering layers is more than two, and each of the FB covering layers is stacked and arranged at the first end of the antenna body.

3. The three-dimensional enhanced RF front-end device according to claim 1, characterized in that: The FB covering layer includes a top plate and a patch, and the patch is arranged on a side of the top plate close to the antenna body.

4. The three-dimensional enhanced RF front-end device according to claim 3, characterized in that: The patch is a rectangular patch or a circular patch.

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

6. The three-dimensional enhanced RF front-end device according to claim 1, characterized in that: The dual-polarized log-periodic antenna further includes more than two balanced-unbalanced transformers, each of which 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.

7. The three-dimensional enhanced RF front-end device according to claim 1, characterized in that: The dual-polarized log-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; A fourth coaxial line, disposed on the fourth set line, and symmetrical with the second coaxial line about the space axis; 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, and the wires of the first coaxial line, the second coaxial line, the third coaxial line, and the fourth coaxial line are 50 ohm coaxial lines.

8. The three-dimensional enhanced 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.

9. The three-dimensional enhanced RF front-end device according to claim 1, characterized in that: The dual-polarization log-periodic antenna further includes a reflector disposed at the second end of the antenna body.

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