Dual-frequency broadband circularly polarized fusion antenna with large frequency ratio

Abstract

The invention discloses a dual-frequency broadband circularly polarized fusion antenna with a large frequency ratio, which comprises a first dielectric plate, a second dielectric plate and a third dielectric plate, the third dielectric plate is positioned above the second dielectric plate, and the second dielectric plate is positioned above the first dielectric plate. The upper surface and the lower surface of the third dielectric plate are both provided with metal layers, the two metal layers are connected through a metal column group to form a resonant cavity, and the metal layer on the upper surface is provided with a radiation slot array. The lower surface of the second dielectric plate is a copper-clad layer serving as a grounding plate, a metal column group is arranged in the second dielectric plate and connected with the grounding plate and the metal layer on the lower surface of the third dielectric plate, and an L-shaped gap is formed in the grounding plate. A millimeter wave feed network and a microwave feed line are arranged on the lower surface of the first dielectric plate, and an output port of the feed network is connected with the sixteen millimeter wave metal feed probes to feed the antenna in a millimeter wave frequency band. The antenna has a dual-frequency broadband circular polarization characteristic, the influence of a multipath effect is effectively reduced, and multiplexing of the radiator is realized.

Description

Technical Field

[0001] This invention relates to the field of wireless communication technology, and in particular to a dual-band broadband circularly polarized fusion antenna with a high frequency ratio. Background Technology

[0002] Compared to traditional 4G technology, 5G technology offers advantages such as greater bandwidth and faster transmission speeds, meeting the demands of high-speed data transmission. Currently, available spectrum resources in the microwave band for wireless communication are extremely limited; therefore, future communication technology development will shift towards the millimeter-wave band, which boasts abundant spectrum resources. Since microwave communication technology is already highly mature, future communication will achieve a convergence of microwave and millimeter-wave communication, making antennas capable of integrating both bands promising for future applications.

[0003] Currently, most dual-band microwave and millimeter-wave antennas are designed separately and then packaged in the same communication device. This results in a large device size and high space requirements, hindering its further development. Common-aperture antennas can integrate antenna elements of different frequency bands onto the same dielectric substrate, reducing the space requirements of the communication device. However, the significant size difference between microwave and millimeter-wave antennas means that the overall antenna size is still relatively large. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the prior art and propose a dual-band broadband circularly polarized fusion antenna with a large frequency ratio. This antenna has the advantages of cross-band and multiplexing of radiating structure, making it suitable for broadband communication and communication scenarios with highly integrated equipment. It has broadband circular polarization performance in both frequency bands, and the entire millimeter-wave array is multiplexed into a circularly polarized antenna operating in the microwave frequency band, which can realize the fusion of microwave and millimeter-wave communication, solve the problem of limited space resources in communication equipment, and the dual-band broadband circular polarization characteristics also reduce the impact of multipath effects and improve communication quality.

[0005] To achieve the above objectives, the technical solution provided by this invention is as follows: a dual-band broadband circularly polarized fusion antenna with a high frequency ratio, comprising a first dielectric substrate, a second dielectric substrate, a third dielectric substrate, and a millimeter-wave metal feed probe; the second dielectric substrate is stacked on top of the first dielectric substrate, and the third dielectric substrate is stacked on top of the second dielectric substrate; a millimeter-wave feed network and microwave feed lines are disposed on the lower surface of the first dielectric substrate; a copper-clad layer is disposed on the lower surface of the second dielectric substrate as a metal ground plane, and an L-shaped slot is disposed on the metal ground plane; a plurality of arrayed first metal layers are disposed on the upper surface of the third dielectric substrate, and a pair of second metal layers are disposed on its lower surface, each pair of first metal layers... The first and second metal layers are connected by a group of metal pillars located in the third dielectric substrate to form a closed resonant cavity. Multiple radiation slots are provided on the first metal layer, and a group of metal pillars is provided between each pair of adjacent radiation slots. The millimeter-wave feed network is connected to millimeter-wave metal feed probes. There are multiple millimeter-wave metal feed probes, each corresponding to one of the first metal layers. A first group of metal pillars is provided within the second dielectric substrate. The metal pillars in the first group of metal pillars are paired with the millimeter-wave metal feed probes and the second metal layer, and are respectively connected to the metal ground plane and the corresponding second metal layer. The millimeter-wave metal feed probes pass through the corresponding metal pillars of the first and second dielectric substrates, the third dielectric substrate, and connect to the corresponding first metal layer.

[0006] Preferably, the first metal layers are arranged in a 4×4 matrix on the upper surface of the third dielectric substrate. Each first metal layer has four radiating slots, namely a first radiating slot, a second radiating slot, a third radiating slot, and a fourth radiating slot. The four radiating slots on four adjacent rectangularly distributed first metal layers form a rectangular rotating array. The paired first metal layers and second metal layers are connected by a second metal pillar group, a third metal pillar group, a fourth metal pillar group, a fifth metal pillar group, and a sixth metal pillar group in the third dielectric substrate to form a closed resonant cavity. The second metal pillar group surrounds the periphery of the first metal layer and the second metal layer. The third metal pillar group is located between the first radiating slot and the fourth radiating slot. The fourth metal pillar group is located between the third radiating slot and the fourth radiating slot. The fifth metal pillar group is located between the second radiating slot and the third radiating slot. The sixth metal pillar group is located between the first radiating slot and the second radiating slot.

[0007] Preferably, the millimeter-wave feed network includes a millimeter-wave input port, a first quarter-wavelength impedance transformer, and two sub-feed networks. The millimeter-wave input port is connected to the first quarter-wavelength impedance transformer via a millimeter-wave feed line. The two sub-feed networks are respectively connected to the first quarter-wavelength impedance transformer via millimeter-wave feed lines. Each sub-feed network includes a second quarter-wavelength impedance transformer, a third quarter-wavelength impedance transformer, a fourth quarter-wavelength impedance transformer, a fifth quarter-wavelength impedance transformer, a sixth quarter-wavelength impedance transformer, a seventh quarter-wavelength impedance transformer, an eighth quarter-wavelength impedance transformer, and two identical sub-array output ports. The second quarter-wavelength impedance transformer is connected to the first quarter-wavelength impedance transformer via a millimeter-wave feed line. The third and fourth quarter-wavelength impedance transformers are respectively connected to the second quarter-wavelength impedance transformer via millimeter-wave feed lines. The two identical sub-arrays... The output ports are referred to as the first subarray output port and the second subarray output port, respectively. Each of them includes four output ports. Two of the output ports of the first subarray output port are connected to the fifth quarter-wavelength impedance transformer via millimeter-wave feed lines, and the remaining two output ports are connected to the sixth quarter-wavelength impedance transformer via millimeter-wave feed lines. The fifth and sixth quarter-wavelength impedance transformers are connected to the third quarter-wavelength impedance transformer via millimeter-wave feed lines. Two of the output ports of the second subarray output port are connected to the seventh quarter-wavelength impedance transformer via millimeter-wave feed lines, and the remaining two output ports are connected to the eighth quarter-wavelength impedance transformer via millimeter-wave feed lines. The seventh and eighth quarter-wavelength impedance transformers are connected to the fourth quarter-wavelength impedance transformer via millimeter-wave feed lines. The four subarray output ports of the two sub-feed networks are distributed in a rectangular array.

[0008] Preferably, the four output ports of the subarray output port are respectively connected to the corresponding millimeter-wave metal feed probe.

[0009] Preferably, the millimeter-wave metal feed probe is connected to the center of the corresponding first metal layer.

[0010] Preferably, the first metal layer, the second metal layer, the millimeter-wave feed network, and the microwave feed line are all copper-clad layers.

[0011] Preferably, the millimeter-wave metal-fed probe, the first metal column group, the second metal column group, the third metal column group, the fourth metal column group, the fifth metal column group, and the sixth metal column group are all copper columns.

[0012] Preferably, when excited by a microwave feed line, the dual-band broadband circularly polarized fusion antenna operates in the microwave band and has right-hand circular polarization characteristics. The first and second metal layers arranged in a 4×4 matrix are connected by the second, third, fourth, fifth, and sixth metal pillar groups in the third dielectric substrate to form a closed resonant cavity, which is equivalent to a microwave radiator. When excited by a millimeter-wave feed network, the dual-band broadband circularly polarized fusion antenna operates in the millimeter-wave band and has left-hand circular polarization characteristics.

[0013] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0014] 1. The antenna designed in this invention realizes the reuse of microwave and millimeter-wave radiation structures, increases the antenna aperture utilization rate, and can solve the problem of limited space resources in communication equipment.

[0015] 2. This invention achieves dual-band broadband circular polarization characteristics by designing a millimeter-wave feed network and a feed structure of microwave feed lines and L-shaped gaps, integrating microwave communication with 5G millimeter-wave communication, with both frequency bands having high gain.

[0016] 3. The two frequency band feeding structures of the antenna of the present invention do not interfere with each other, and the isolation between the two frequency bands within the working frequency band is high. Attached Figure Description

[0017] Figure 1 A three-dimensional view of the fusion antenna designed for this invention.

[0018] Figure 2 A top view of the fusion antenna designed for this invention.

[0019] Figure 3 The diagram shows the millimeter-wave feed network structure of the fusion antenna designed for this invention.

[0020] Figure 4 The S-parameter curve of the fusion antenna designed for the present invention in the microwave band.

[0021] Figure 5 The axial ratio parameter curve of the fusion antenna designed for the present invention in the microwave band.

[0022] Figure 6 The radiation pattern of the fusion antenna designed for this invention in the microwave band 3.6 GHz.

[0023] Figure 7 The radiation pattern of the fusion antenna designed for this invention in the microwave band 4GHz.

[0024] Figure 8 The S-parameter curve of the fusion antenna designed for the present invention in the millimeter-wave band.

[0025] Figure 9 The axial ratio parameter curve of the fusion antenna designed for the present invention in the millimeter-wave band.

[0026] Figure 10 The radiation pattern of the fusion antenna designed for this invention in the millimeter-wave band at 26 GHz.

[0027] Figure 11 The radiation pattern of the fusion antenna designed for this invention at 27 GHz in the millimeter-wave band. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0029] like Figure 1 and Figure 2As shown, this embodiment discloses a dual-band broadband circularly polarized fusion antenna with a high frequency ratio, including a first dielectric substrate 1, a second dielectric substrate 2, a third dielectric substrate 3, and a millimeter-wave metal feed probe 4; the second dielectric substrate 2 is stacked on top of the first dielectric substrate 1, and the third dielectric substrate 3 is stacked on top of the second dielectric substrate 2; a millimeter-wave feed network 11 and a microwave feed line 12 are disposed on the lower surface of the first dielectric substrate 1; a copper-clad layer is disposed on the lower surface of the second dielectric substrate 2 as a metal ground plane 21, and an L-shaped slot 23 is disposed on the metal ground plane 21; the third dielectric substrate... The upper surface of the substrate 3 has a first metal layer 31 arranged in a 4×4 matrix, and the lower surface has a second metal layer 32 that is paired with the first metal layer 31. The first metal layer 31 has four radial slots: a first radial slot 34, a second radial slot 35, a third radial slot 36, and a fourth radial slot 37. The four radial slots on four adjacent rectangularly distributed first metal layers 31 form a rectangular rotating array. Each paired first metal layer 31 and second metal layer 32 is connected by a second metal pillar group 33, a third metal pillar group 38, and a fourth metal pillar group 37 in the third dielectric substrate 3. Metal pillar group 39, fifth metal pillar group 40, and sixth metal pillar group 41 are connected to form a closed resonant cavity. Second metal pillar group 33 surrounds the periphery of first metal layer 31 and second metal layer 32. Third metal pillar group 38 is located between first radiation slot 34 and fourth radiation slot 37. Fourth metal pillar group 39 is located between third radiation slot 36 and fourth radiation slot 37. Fifth metal pillar group 40 is located between second radiation slot 35 and third radiation slot 36. Sixth metal pillar group 41 is located between first radiation slot 34 and second radiation slot 35. The millimeter-wave feed network 11 is connected to the millimeter-wave metal feed probe 4; there are sixteen millimeter-wave metal feed probes 4, each corresponding to a first metal layer 31; a first metal pillar group is provided in the second dielectric substrate 2, and the metal pillars 22 in the first metal pillar group are paired with the millimeter-wave metal feed probes 4 and the second metal layer 32, and are respectively connected to the metal ground plane 21 and the corresponding second metal layer 32; each millimeter-wave metal feed probe 4 passes through the first dielectric substrate 1, the corresponding metal pillar 22 of the second dielectric substrate 2, and the third dielectric substrate 3 and is connected to the corresponding first metal layer 31.

[0030] like Figure 3As shown, the millimeter-wave feed network 11 includes a millimeter-wave input port 111, a first quarter-wavelength impedance transformer 112, and two sub-feed networks. The millimeter-wave input port 111 is connected to the first quarter-wavelength impedance transformer 112 via a millimeter-wave feed line. The two sub-feed networks are respectively connected to the first quarter-wavelength impedance transformer 112 via millimeter-wave feed lines. Each sub-feed network includes a second quarter-wavelength impedance transformer 113, a third quarter-wavelength impedance transformer 114, a fourth quarter-wavelength impedance transformer 115, a fifth quarter-wavelength impedance transformer 116, and a sixth quarter-wavelength impedance transformer 117. The system includes a wavelength impedance transformer 117, a seventh quarter-wavelength impedance transformer 118, an eighth quarter-wavelength impedance transformer 119, and two identical subarray output ports. The second quarter-wavelength impedance transformer 113 is connected to the first quarter-wavelength impedance transformer 112 via a millimeter-wave feed line. The third quarter-wavelength impedance transformer 114 and the fourth quarter-wavelength impedance transformer 115 are respectively connected to the second quarter-wavelength impedance transformer 113 via millimeter-wave feed lines. The two identical subarray output ports are referred to as the first subarray output port and the second subarray output port, each comprising four... The output ports (see 130, 131, 132, and 133 in the figure) are as follows: Two of the first subarray output ports (130 and 133) are connected to the fifth quarter-wavelength impedance transformer 116 via millimeter-wave feed lines, and the other two output ports (131 and 132) are connected to the sixth quarter-wavelength impedance transformer 117 via millimeter-wave feed lines. The fifth quarter-wavelength impedance transformer 116 and the sixth quarter-wavelength impedance transformer 117 are connected to the third quarter-wavelength impedance transformer 114 via millimeter-wave feed lines. Two of the second subarray output ports... The output ports (130, 133) are connected to the seventh quarter-wavelength impedance transformer 118 via millimeter-wave feed lines, and the other two output ports (131, 132) are connected to the eighth quarter-wavelength impedance transformer 119 via millimeter-wave feed lines. The seventh quarter-wavelength impedance transformer 118 and the eighth quarter-wavelength impedance transformer 119 are connected to the fourth quarter-wavelength impedance transformer 115 via millimeter-wave feed lines. The four sub-array output ports of the two sub-feed networks are arranged in a rectangular array, and the four output ports of the sub-array output ports are connected to the corresponding millimeter-wave metal feed probes 4.

[0031] When the microwave feed line 12 is excited, the dual-band broadband circularly polarized fusion antenna operates in the microwave band. The first metal layer 31 and the second metal layer 32, arranged in a 4×4 matrix, are connected by the second metal pillar group 33, the third metal pillar group 38, the fourth metal pillar group 39, the fifth metal pillar group 40, and the sixth metal pillar group 41 in the third dielectric plate 3 to form a closed resonant cavity, which is equivalent to a microwave radiator. When the millimeter-wave feed network 11 is excited, the dual-band broadband circularly polarized fusion antenna operates in the millimeter-wave band.

[0032] Specifically, the first metal layer 31, the second metal layer 32, the millimeter-wave feed network 11, and the microwave feed line 12 are all copper-clad layers. The millimeter-wave metal feed probe 4, the first metal pillar group, the second metal pillar group 33, the third metal pillar group 38, the fourth metal pillar group 39, the fifth metal pillar group 40, and the sixth metal pillar group 41 are all copper pillars. The first dielectric substrate 1 and the second dielectric substrate 2 are both 92mm in length and width, made of TLY-5 material with a dielectric constant of 2.2 and a loss tangent of 0.0009. The first dielectric substrate 1 has a thickness of 0.254mm, the second dielectric substrate 2 has a thickness of 3.175mm, and the third dielectric substrate 3 has a thickness of 1.57mm. The first metal layer 31 and the second metal layer 32 are both 15.8mm in length and width. The diameter of metal pillar 22 in the first metal pillar group is 0.3 mm, and the diameter of the metal pillars in the second, third, fourth, fifth, and sixth metal pillar groups 33, 38, 39, 40, and 41 is 0.4 mm. The lengths of the first, second, third, and fourth radiating slits 34, 35, 36, and 37 are 5.6 mm and 1.7 mm respectively. The lengths of the L-shaped slit 23 are 16.6 mm and 22 mm, and the width is 2 mm. The quarter-wavelength impedance transformer has a length of 1.9 mm, a width of 1.25 mm, and an impedance of... The diameter of the millimeter-wave metal feed probe 4 is 0.4 mm.

[0033] like Figure 4 As shown in the figure, the microwave band S-parameter simulation results of the dual-band broadband circularly polarized fusion antenna described in this embodiment are displayed. It can be seen from the figure that the range of reflection coefficient less than -10dB is 3.22-4.32GHz, and the in-band isolation from the millimeter-wave port is higher than 35dB.

[0034] like Figure 5 As shown in the figure, the microwave band axial ratio simulation results of the dual-band broadband circularly polarized fusion antenna described above in this embodiment are displayed. It can be seen from the figure that the range where AR is less than 3dB is 3.5-4.15GHz, and the frequency band where S-parameters and axial ratio coincide is 3.5-4.15GHz, which has right-hand circular polarization characteristics.

[0035] like Figure 6 and Figure 7As shown, the simulation results of the microwave frequency bands 3.6GHz and 4GHz of the dual-band broadband circularly polarized fusion antenna described in this embodiment are displayed. It can be seen from the figure that the maximum gain is 10.7dBi.

[0036] like Figure 8 As shown in the figure, the simulation results of the millimeter-wave S-parameters of the dual-band broadband circularly polarized fusion antenna described in this embodiment are displayed. It can be seen from the figure that the range of reflection coefficients less than -10dB is 25.1-29GHz.

[0037] like Figure 9 As shown in the figure, the simulation results of the axial ratio of the dual-band broadband circularly polarized fusion antenna in the millimeter-wave band of this embodiment are displayed. It can be seen from the figure that the range where AR is less than 3dB is 25-27.8GHz, and the frequency band where S-parameters and axial ratio coincide is 25.1-27.8GHz, which has left-hand circular polarization characteristics.

[0038] like Figure 10 and Figure 11 The figure shows the simulation results of the millimeter-wave band radiation patterns of the dual-band broadband circularly polarized fusion antenna described in this embodiment at 26 GHz and 27 GHz. As can be seen from the figure, the maximum gain is 15 dBi.

[0039] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A dual-band broadband circularly polarized fusion antenna with a high frequency ratio, characterized in that, The system includes a first dielectric substrate (1), a second dielectric substrate (2), a third dielectric substrate (3), and a millimeter-wave metal feed probe (4); the second dielectric substrate (2) is stacked on top of the first dielectric substrate (1), and the third dielectric substrate (3) is stacked on top of the second dielectric substrate (2); a millimeter-wave feed network (11) and a microwave feed line (12) are provided on the lower surface of the first dielectric substrate (1); a copper-clad layer is provided on the lower surface of the second dielectric substrate (2) as a metal ground plane (21), and an L-shaped slot (23) is provided on the metal ground plane (21); a plurality of arrayed first metal layers (31) are provided on the upper surface of the third dielectric substrate (3), and a pair of second metal layers (32) are provided on its lower surface, each pair of first metal layers (31) and second metal layers (32) being connected by a probe located on the third dielectric substrate (4). The metal pillars in 3) are connected to form a closed resonant cavity; multiple radiation slots are provided on the first metal layer (31), and metal pillars are provided between each pair of adjacent radiation slots; the millimeter-wave feed network (11) is connected to the millimeter-wave metal feed probe (4); there are multiple millimeter-wave metal feed probes (4), and they correspond one-to-one with the first metal layer (31); the second dielectric plate (2) is provided with a first metal pillar group, and the metal pillars (22) in the first metal pillar group are paired one-to-one with the millimeter-wave metal feed probe (4) and the second metal layer (32), and are respectively connected to the metal ground plane (21) and the corresponding second metal layer (32); the millimeter-wave metal feed probe (4) passes through the first dielectric plate (1), the corresponding metal pillar (22) of the second dielectric plate (2), the third dielectric plate (3), and is connected to the corresponding first metal layer (31).

2. The dual-band broadband circularly polarized fusion antenna with a high frequency ratio according to claim 1, characterized in that, The first metal layer (31) is arranged in a 4×4 matrix on the upper surface of the third dielectric plate (3). Each first metal layer (31) has four radiation slots, namely the first radiation slot (34), the second radiation slot (35), the third radiation slot (36), and the fourth radiation slot (37). The four radiation slots on four adjacent rectangularly distributed first metal layers (31) form a rectangular rotating array. The paired first metal layer (31) and second metal layer (32) are connected by the second metal pillar group (33), the third metal pillar group (38), the fourth metal pillar group (39), and the fifth metal pillar group (4) in the third dielectric plate (3). 0) The sixth metal pillar group (41) is connected to form a closed resonant cavity. The second metal pillar group (33) surrounds the first metal layer (31) and the second metal layer (32). The third metal pillar group (38) is located between the first radiation gap (34) and the fourth radiation gap (37). The fourth metal pillar group (39) is located between the third radiation gap (36) and the fourth radiation gap (37). The fifth metal pillar group (40) is located between the second radiation gap (35) and the third radiation gap (36). The sixth metal pillar group (41) is located between the first radiation gap (34) and the second radiation gap (35).

3. A dual-band broadband circularly polarized fusion antenna with a high frequency ratio according to claim 2, characterized in that, The millimeter-wave feed network (11) includes a millimeter-wave input port (111), a first quarter-wavelength impedance transformer (112), and two sub-feed networks. The millimeter-wave input port (111) is connected to the first quarter-wavelength impedance transformer (112) via a millimeter-wave feed line. The two sub-feed networks are respectively connected to the first quarter-wavelength impedance transformer (112) via millimeter-wave feed lines. Each sub-feed network includes a second quarter-wavelength impedance transformer (113), a third quarter-wavelength impedance transformer (114), and a fourth quarter-wavelength impedance transformer (115). The system comprises a fifth quarter-wavelength impedance transformer (116), a sixth quarter-wavelength impedance transformer (117), a seventh quarter-wavelength impedance transformer (118), an eighth quarter-wavelength impedance transformer (119), and two identical sub-array output ports. The second quarter-wavelength impedance transformer (113) is connected to the first quarter-wavelength impedance transformer (112) via a millimeter-wave feed line. The third quarter-wavelength impedance transformer (114) and the fourth quarter-wavelength impedance transformer (115) are respectively connected to the second quarter-wavelength impedance transformer (113) via millimeter-wave feed lines. The two identical sub-array output ports are referred to as the first sub-array output port and the second sub-array output port, respectively. Each of them includes four output ports. Two of the output ports of the first sub-array output port are respectively connected to the fifth quarter-wavelength impedance transformer (116) via millimeter-wave feed lines, and the other two output ports are respectively connected to the sixth quarter-wavelength impedance transformer (117) via millimeter-wave feed lines. The fifth quarter-wavelength impedance transformer (116) and the sixth quarter-wavelength impedance transformer (117) are respectively connected to the third quarter-wavelength impedance transformer (119) via millimeter-wave feed lines. A wavelength impedance transformer (114) is connected, and two of the output ports of the second subarray are connected to the seventh quarter wavelength impedance transformer (118) via millimeter-wave feed lines, and the other two output ports are connected to the eighth quarter wavelength impedance transformer (119) via millimeter-wave feed lines. The seventh quarter wavelength impedance transformer (118) and the eighth quarter wavelength impedance transformer (119) are connected to the fourth quarter wavelength impedance transformer (115) via millimeter-wave feed lines. The four subarray output ports of the two sub-feed networks are distributed in a rectangular array.

4. A dual-band broadband circularly polarized fusion antenna with a high frequency ratio according to claim 3, characterized in that, The four output ports of the subarray output port are respectively connected to the corresponding millimeter-wave metal feed probe (4).

5. A dual-band broadband circularly polarized fusion antenna with a high frequency ratio according to claim 4, characterized in that, The millimeter-wave metal feed probe (4) is connected to the center of the corresponding first metal layer (31).

6. A dual-band broadband circularly polarized fusion antenna with a high frequency ratio according to claim 5, characterized in that, The first metal layer (31), the second metal layer (32), the millimeter-wave feed network (11) and the microwave feed line (12) are all copper-clad layers.

7. A dual-band broadband circularly polarized fusion antenna with a large frequency ratio according to claim 6, characterized in that, The millimeter-wave metal feed probe (4), the first metal column group (33), the third metal column group (38), the fourth metal column group (39), the fifth metal column group (40), and the sixth metal column group (41) are all copper metal columns.

8. A dual-band broadband circularly polarized fusion antenna with a high frequency ratio according to claim 7, characterized in that, When excited by the microwave feed line (12), the dual-band broadband circularly polarized fusion antenna operates in the microwave band and has right-hand circular polarization characteristics. The first metal layer (31) and the second metal layer (32) arranged in a 4×4 matrix are connected by the second metal pillar group (33), the third metal pillar group (38), the fourth metal pillar group (39), the fifth metal pillar group (40), and the sixth metal pillar group (41) in the third dielectric plate (3) to form a closed resonant cavity, which is equivalent to a microwave radiator. When excited by the millimeter-wave feed network (11), the dual-band broadband circularly polarized fusion antenna operates in the millimeter-wave band and has left-hand circular polarization characteristics.

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