Wideband pass / filter radiating element, common aperture antenna array and communication device

Abstract

The present invention discloses a wideband pass / filter radiating element, a common aperture antenna array, and a communication device. The radiating element includes a radiating structure and a feeding structure. The radiating structure and the feeding structure employ a coupled feeding method so that the radiating structure radiates a low-frequency electromagnetic wave signal to the outside. The radiating structure includes a radiator mounted with a multilayer-surface periodic structure. When the radiating structure operates in a first mode, electromagnetic waves excited by the high-frequency radiating element illuminate the radiating structure, and the radiator and the multilayer-surface periodic structure form a spatial bandpass filter circuit with K resonance points and K null points. When the radiating structure operates in a second mode, low-frequency electromagnetic waves excite the radiating structure via the feeding structure, and the elements of the multilayer-surface periodic structure are excited in parallel by the radiator, forming an equivalent filter circuit. The present invention can improve the distortion of the radiation pattern of a multiband antenna and improve indicators such as antenna gain, out-of-band suppression, and cross-polarization ratio.

Description

[Technical Field]

[0001] The present invention relates to a wideband pass / filter radiating element, a common aperture antenna array and a communication device, and belongs to the technical field of mobile communication. [Background technology]

[0002] With the widespread commercial deployment of 5G mobile communication systems, array antennas of different frequency bands share a reflective surface to form a common aperture antenna. To reduce the antenna surface area, high-frequency antenna radiating elements are often arranged around low-frequency radiating elements. The closer the physical distance between them, the more severe the interference. Interference between high-frequency and low-frequency antenna radiating elements can be divided into two types. One is bilateral radiation interference. When electromagnetic waves radiated by a high-frequency antenna illuminate a low-frequency radiating element, electromagnetic induction occurs in the low-frequency radiating element, exciting electromagnetic radiation. This can distort the radiation pattern of the high-frequency antenna array due to the superposition of the two electromagnetic waves. This type of interference can usually be resolved by making the low-frequency radiating element transparent. The other is self-radiation interference. A low-frequency radiating element not only excites electromagnetic waves within its own operating frequency band, but can also excite electromagnetic waves within a range twice or three times its own operating frequency band due to frequency multiplication. This type of interference is usually solved by additional filter circuits, but currently the ability to integrate transmission / filtering with the emitting surface is not yet realized. Summary of the Invention [Problem to be solved by the invention]

[0003] Therefore, the present invention provides a wideband pass / filter radiating element, a common aperture antenna array, and a communication device that can improve the distortion of the radiation pattern of a multi-band antenna and improve indicators such as antenna gain, out-of-band suppression, and cross-polarization ratio.

[0004] A first object of the present invention is to provide a broadband pass / filter radiating element.

[0005] A second object of the present invention is to provide a common aperture antenna array.

[0006] A third object of the present invention is to provide a mobile communication device. [Means for solving the problem]

[0007] The first object of the present invention can be achieved by the following technical means.

[0008] The wideband pass / filter radiating element includes a radiating structure and a feeding structure, the radiating structure and the feeding structure adopt a coupled feeding method, so that the radiating structure radiates a low-frequency electromagnetic wave signal to the outside, and the radiating structure includes a radiator having a multilayer surface periodic structure mounted thereon; When the radiating structure operates in a first mode, an electromagnetic wave excited by the high-frequency radiating element illuminates the radiating structure, and the radiator and the multilayer surface periodic structure in the radiating structure form a spatial band-pass filter circuit of non-resonant nodes having K resonant points and K null points, where K≧1; When the radiating structure operates in a second mode, low frequency electromagnetic waves excite the radiating structure via the feeding structure, and the elements of the multilayer surface periodic structure are excited in parallel by the radiator to form an equivalent filter circuit.

[0009] Furthermore, the radiator includes four radiating arms provided on the substrate, the four radiating arms being a first radiating arm, a second radiating arm, a third radiating arm and a fourth radiating arm, respectively, the first radiating arm and the third radiating arm forming a +45° polarization of the low frequency radiating element, and the second radiating arm and the fourth radiating arm forming a −45° polarization of the low frequency radiating element.

[0010] Furthermore, each radiating arm comprises a plurality of transmission / filter elements and a feed block, each transmission / filter element comprises two metal straight sections, a first U-shaped open element and a second U-shaped open element, and the feed block is connected to the feed structure; Two metal straight lines are provided on the upper and lower layers of the substrate, respectively, and the two metal straight lines are connected via metal through-holes, and the metal straight lines of the multiple transmission / filter elements and the power supply blocks are sequentially connected to form a ring-shaped polygon; The first U-shaped open element and the second U-shaped open element are located on one side or both sides of the metal straight portion, and dual-band or wide-band transmission is realized by controlling the resonance frequencies of the first U-shaped open element and the second U-shaped open element.

[0011] Furthermore, when the first U-shaped open element and the second U-shaped open element are located on one side of the metal straight portion, the first U-shaped open element is provided on the upper layer of the substrate and the second U-shaped open element is provided on the lower layer of the substrate, or the first U-shaped open element is provided on the lower layer of the substrate and the second U-shaped open element is provided on the upper layer of the substrate.

[0012] Furthermore, when the first U-shaped open element and the second U-shaped open element are located on both sides of the metal straight portion, the first U-shaped open element is provided on the upper layer of the substrate and the second U-shaped open element is provided on the lower layer of the substrate, or the first U-shaped open element is provided on the lower layer of the substrate and the second U-shaped open element is provided on the upper layer of the substrate, or both the first U-shaped open element and the second U-shaped open element are provided on the upper layer of the substrate, or both the first U-shaped open element and the second U-shaped open element are provided on the lower layer of the substrate.

[0013] Furthermore, the width of the metal straight portion is 1.5 mm to 2 mm.

[0014] Furthermore, the total length of the first U-shaped open element and the second U-shaped open element is half the operating wavelength of the corresponding passband frequency band, the line width is 1mm to 2mm, the U-shaped opening width is 2mm to 5mm, and the distance between the first U-shaped open element and the second U-shaped open element and the metal straight portion is 0.01 to 0.03 times the wavelength of the corresponding frequency band, respectively.

[0015] Furthermore, one of the first U-shaped open element and the second U-shaped open element is developed into the shape of an equivalent resonant circuit.

[0016] Furthermore, the equivalent resonant circuit has a linear shape, and the U-shaped open element developed into the linear shape is located inside or outside the metal linear portion.

[0017] Furthermore, the shape of the equivalent resonant circuit is linear, and the U-shaped open element expanded in a linear fashion is located on the same side as the other U-shaped open element, or the U-shaped open element expanded in a linear fashion and the other U-shaped open element are located on both sides of the metal linear portion.

[0018] Furthermore, when a linearly expanded U-shaped open element and another U-shaped open element are located on both sides of the metal straight section, the linearly expanded U-shaped open element is provided on the upper layer of the substrate and the other U-shaped open element is provided on the lower layer of the substrate, or the linearly expanded U-shaped open element is provided on the lower layer of the substrate and the other U-shaped open element is provided on the upper layer of the substrate.

[0019] Furthermore, the feed block faces one transmission / filter element, the first radiation arm and the third radiation arm, the length of the line connecting the power feed block and the opposite transmission / filter element is 0.44 to 0.5 times the wavelength corresponding to the operating center frequency of the low-frequency radiation element; In the second and fourth radiating arms, the length of the line connecting the feed block and the opposite transmission / filter element is 0.22 to 0.25 times the wavelength corresponding to the operating center frequency of the low-frequency radiating element.

[0020] The second object of the present invention can be achieved by the following technical means.

[0021] The common aperture antenna array comprises a first antenna, a second antenna, and a reflector, the first antenna being the above-mentioned broadband transmission / filter radiating element, the second antenna being a high-frequency radiating array, the broadband transmission / filter radiating element and the high-frequency radiating array being distributed on the reflector, and the broadband transmission / filter radiating element being arranged on the high-frequency radiating array.

[0022] Furthermore, the common aperture antenna array has a multi-layer structure, and a resonant structure is mounted on each layer to form a multi-frequency resonant circuit, thereby realizing multi-frequency transmission / filter characteristics.

[0023] The third object of the present invention can be achieved by the following technical means.

[0024] A mobile communication device comprises a wideband pass / filter radiating element as described above, or comprises a satellite communication filtered common aperture antenna array as described above. [Effects of the Invention]

[0025] The present invention has the following advantageous effects compared to the prior art. The broadband transmission / filter radiating element of the present invention has a simple structure, integrates a filter function while maintaining good transmission performance, and has important research significance and broad application prospects. Furthermore, by providing a transmission / filter element on the radiator of the radiating element, the radiation pattern of the high-frequency radiating array can be effectively improved and the standing wave bandwidth of the radiating element can be widened. [Brief explanation of the drawings]

[0026] In order to more clearly describe the technical means in the embodiments of the present invention or the prior art, the drawings that need to be used in the description of the embodiments or the prior art will be briefly described below. The drawings in the following description are merely some embodiments of the present invention, and it is obvious that those skilled in the art can derive other drawings from these drawings without creative efforts.

[0027] [Figure 1]1 is a structural schematic diagram of a wideband transmission / filter radiating element according to a first embodiment of the present invention; [Figure 2] 1 is a diagram showing an equivalent spatial bandpass filter circuit when the radiation structure of Example 1 of the present invention operates in a first mode. [Figure 3] FIG. 4 is a diagram showing an equivalent filter circuit when the radiation structure of the first embodiment of the present invention operates in a second mode. [Figure 4] FIG. 4 is a diagram illustrating an equivalent non-resonant node filter circuit that combines FIGS. [Figure 5] 1 is a schematic diagram of a radiation structure according to a first embodiment of the present invention; [Figure 6] 1 is a structural schematic diagram of a radiation arm according to a first embodiment of the present invention; [Figure 7] 1 is a structural schematic diagram of a transmission / filter element according to a first embodiment of the present invention; [Figure 8] FIG. 3 is a diagram showing the results of a transmission simulation of the transmission / filter element according to the first embodiment of the present invention. [Figure 9] FIG. 4 is a diagram showing the results of an RCS simulation of the radiation arm according to the first embodiment of the present invention. [Figure 10] 3 is a comparison diagram of the gain curves of the wideband pass / filter radiating element according to the first embodiment of the present invention and the conventional low-frequency radiating element. FIG. [Figure 11] FIG. 2 is a structural schematic diagram of a common aperture antenna array according to a second embodiment of the present invention. [Figure 12] FIG. 10 is a structural schematic diagram of a radiation arm according to a third embodiment of the present invention. [Figure 13] FIG. 10 is a structural schematic diagram of a radiation arm according to a fourth embodiment of the present invention. [Figure 14] FIG. 10 is a structural schematic diagram of a radiation arm according to a fifth embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0028] In order to more clearly understand the above objects, features, and advantages of the present invention, the following detailed description of specific embodiments of the present invention will be given with reference to the accompanying drawings. In order to fully understand the present invention, many specific details will be set forth in the following description. However, the present invention can be embodied in many other forms different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention, so the present invention is not limited to the specific embodiments disclosed below.

[0029] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element, or may be connected to the other element via an intermediate element. In the following examples, "connection" should be understood as "electrical connection," "communication connection," etc., when connected circuits, modules, elements, etc. transmit electrical signals or data to each other.

[0030] As used herein, the singular forms "a," "one," and "the" can also include the plural forms unless the context clearly dictates otherwise. Furthermore, it should be understood that terms such as "comprises," "having," and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possible presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Furthermore, as used herein, terms include any and all combinations of the associated listed items.

[0031] Example 1 As shown in Fig. 1, this embodiment provides a wideband pass / filter radiating element, which is a low-frequency radiating element and includes a radiating structure 1 and a feeding structure 2, where the radiating structure 1 and the feeding structure 2 adopt a coupled feeding method so that the radiating structure 1 radiates a low-frequency electromagnetic wave signal to the outside, and the radiating structure includes a radiator 11 on which a multilayer surface periodic structure 12 is mounted.

[0032] The radiating structure 1 of this embodiment can be divided into two operating modes: a first mode and a second mode. When the radiating structure 1 operates in the first mode, electromagnetic waves excited by the high-frequency radiating elements 3 illuminate the radiating structure 1. The array arms and the multilayer surface periodic structure in the radiating structure 1 form a non-resonant node (NRN) spatial bandpass filter circuit with K resonant points and K null points, as shown in FIG. 2. This allows the electromagnetic wave energy excited by the multiple high-frequency radiating elements 3 to pass as completely as possible through the low-frequency radiating elements, improving the radiation pattern of the high-frequency array. When the radiating structure 1 operates in the second mode, low-frequency electromagnetic waves excite the radiating structure 1 through the feeding section. At this time, the multilayer surface periodic structure 12 is excited in parallel by the radiator 11, forming an equivalent filter circuit as shown in FIG. 3. After the circuits are transformed and integrated, the equivalent filter circuit in FIG. 3 can be integrated into an equivalent non-resonant node filter circuit as shown in FIG. 4. It has been proven that the non-resonant node structure in Figure 4 generates K radiation nulls, and the frequencies of the radiation nulls are the same as the element resonant frequencies of the surface periodic structure of each layer. Therefore, by modulating the element resonant frequencies of the periodic surface, the frequencies of the radiation nulls can be controlled to improve the out-of-band suppression of the antenna, where K≧1.

[0033] 1 and 5, in the radiating structure 1 of this embodiment, the radiator 11 has four radiating arms provided on a substrate 111, which are a first radiating arm 112, a second radiating arm 113, a third radiating arm 114, and a fourth radiating arm 115. The first radiating arm 112 and the third radiating arm 114 form a +45° polarization of the low-frequency radiating element, and the second radiating arm 113 and the fourth radiating arm 115 form a −45° polarization of the low-frequency radiating element. The circuits on the radiator 11 can be etched on the upper and lower layers of the substrate 111 using a PCB (Printed Circuit Board). The solid line portion is the upper layer circuit of the substrate 111, and the shaded portion is the lower layer circuit of the substrate 111. The order of the two can also be reversed, i.e., the solid line portion is the lower layer circuit of the substrate 111, and the shaded portion is the upper layer circuit of the substrate 111.

[0034] 6 is a structural diagram of a radiating arm of this embodiment, taking the second radiating arm 113 as an example, the second radiating arm 113 includes seven transmission / filter elements 1131 and a feed block 1132. As shown in FIG. 7, each transmission / filter element 1131 includes two metal straight portions 11311, a first U-shaped open element 11312, and a second U-shaped open element 11313, the feed block 1132 is connected to the feed structure 2, the two metal straight portions 11311 are provided on the upper and lower layers of the substrate 111, and the two metal straight portions 11311 are connected via metal through holes, the metal straight portions 11311 and the feed blocks 1132 of the seven transmission / filter elements 1131 are connected in sequence to form a circular octagon, and the rotation angle between every two adjacent transmission / filter elements 1131 is 30° to 45°. The first U-shaped open element 11312 and the second U-shaped open element 11313 are located on one side of the metal straight portion 11311, with the first U-shaped open element 11312 being provided on the upper layer of the substrate 111 and the second U-shaped open element 11313 being provided on the lower layer of the substrate 111. It can be understood that the positions of the first U-shaped open element 11312 and the second U-shaped open element 11313 can be interchanged, i.e., the first U-shaped open element 11312 being provided on the lower layer of the substrate 111 and the second U-shaped open element 11313 being provided on the upper layer of the substrate 111.

[0035] Furthermore, the two metal straight sections 11311 are considered to be one metal element, and the first U-shaped open element 11312 and the second U-shaped open element 11313 are each two metal elements. The three metal elements can form transmission paths for two frequency bands in the high-frequency band. The width of the metal straight section 11311 is 1.5 mm to 2 mm. If the line width is too narrow, it will exhibit relatively high inductance characteristics, which will be unfavorable for impedance matching of the low-frequency radiating element and affect the operating bandwidth of the low-frequency radiating element. If the line width is too wide, high-frequency electromagnetic waves will easily irradiate the transmitting element, causing excessive surface waves and affecting the transmission effect. The total length of the first U-shaped open element 11312 and the second U-shaped open element 11313 is half the operating wavelength of the corresponding transmission frequency band, the line width is 1 mm to 2 mm, the U-shaped opening width is 2 mm to 5 mm, and the distance between the first U-shaped open element 11312 and the second U-shaped open element 11313 and the metal straight portion 11311 is 0.01 to 0.03 times the wavelength of the corresponding frequency band. Dual-band or wide-band transmission is achieved by controlling the resonant frequencies of the first U-shaped open element 11312 and the second U-shaped open element 11313. For low-frequency radiating elements, the first U-shaped open element 11312 and the second U-shaped open element 11313 do not radiate energy to the outside due to their own current action, but two null points are formed in the high-frequency band to suppress radiation in the high-frequency band of the low-frequency radiating element. The feed block 1132 faces one transmission / filter element 1131, and the length of the line connecting the feed block 1132 and the facing transmission / filter element 1131 in the second radiating arm 113 is 0.22 to 0.25 times the wavelength corresponding to the operating center frequency of the low-frequency radiating element. Correspondingly, the length of the line connecting the feed block and the facing transmission / filter element in the fourth radiating arm 115 is similarly 0.22 to 0.25 times the wavelength corresponding to the operating center frequency of the low-frequency radiating element. In the first radiating arm 112 and the third radiating arm 114, the length of the line connecting the feed block and the facing transmission / filter element is 0.44 to 0.5 times the wavelength corresponding to the operating center frequency of the low-frequency radiating element.

[0036] Figure 8 shows the simulated performance index when a high-frequency electromagnetic wave is incident on a transmission / filter element. There are two resonance points at 3.48 GHz and 2.24 GHz, and the two U-shaped open elements on the surface resonate at 3.48 GHz and 2.24 GHz. S21 indicates the energy loss of the incident wave after passing through the transmission element within the operating frequency band, and the simulation results show that it is between 0.11 dB and 0.29 dB. Because a single transmission / filter element is a typical resonant circuit with a narrow operating bandwidth, multiple transmission / filter elements are connected to form a radiation arm and RCS simulations are performed. As shown in Figure 9, the RCS is less than -15 dB across the entire range from 2 GHz to 4 GHz, demonstrating that the radiation arm structure has good transmission characteristics.

[0037] 10 is a comparison diagram of the gain curves of the wideband transmission / filter element of this embodiment and the conventional low-frequency radiating element. As can be seen from the figure, in the frequency band of 0.6 GHz to 0.96 GHz, the gain reaches 8 dB, and the degree of agreement between the two is very high, indicating that the addition of the transmission / filter element does not affect the radiation characteristics in the low-frequency band. However, in the frequency bands of 2.4 GHz and 3.6 GHz, two resonance points (null points) are clearly shown, and the gain in the frequency bands of 2.4 GHz and 3.6 GHz is less than 0 dB, so the radiation of the low-frequency radiating element in the high-frequency band is effectively suppressed, indicating the filter characteristics.

[0038] Example 2 As shown in Fig. 11, this embodiment provides a common aperture antenna array. The antenna array includes a first antenna, a second antenna, and a reflector 4, where the first antenna is the wideband transmission / filter radiating element of the first embodiment, and the second antenna is a high frequency radiating array, where the wideband transmission / filter radiating element and the high frequency radiating array are distributed on the reflector 4, the wideband transmission / filter radiating element is disposed within the high frequency radiating array and is fed from the front or back of the antenna via a cable or PCB, and the high frequency radiating array includes a plurality of high frequency radiating elements 3, where the high frequency radiating elements 3 used in the high frequency radiating array are dual-polarized dipole elements. The low-frequency radiating element operates in a frequency band of 617 MHz to 960 MHz, and the high-frequency radiating array operates in a frequency band of 2400 MHz to 3800 MHz. When the high-frequency electromagnetic waves of the second antenna are incident on the radiator of the first antenna, the transmission / filter element on the radiator has a filtering effect on the high-frequency electromagnetic waves of the corresponding frequency band and functions as a spatial filter, so that the electromagnetic waves of the second antenna completely pass through the first antenna, and the transmission / filter element on the radiator has a transmitting effect on the high-frequency electromagnetic waves.

[0039] Example 3 12, in the radiating arm of this embodiment, a first U-shaped open element and a second U-shaped open element are located on both sides of the metal straight portion, with a distance between them being 0.01 to 0.03 times the wavelength of the corresponding frequency band, and both the first U-shaped open element and the second U-shaped open element of this embodiment are provided on the upper layer of the substrate. According to the mirror principle, both the first U-shaped open element and the second U-shaped open element may also be provided on the lower layer of the substrate. It should be further understood that the first U-shaped open element may be provided on the upper layer of the substrate and the second U-shaped open element may be provided on the lower layer of the substrate, or the first U-shaped open element may be provided on the lower layer of the substrate and the second U-shaped open element may be provided on the upper layer of the substrate.

[0040] Example 4 As shown in FIG. 13, the radiation arm of this embodiment has a first U-shaped open element that is linearly expanded, and the linearly expanded first U-shaped open element is referred to as a linear open element. The linear open element and the second U-shaped open element are located inside the metal straight section, and the spacing between them is 0.01 to 0.03 times the wavelength of the corresponding frequency band. The linear open element and the second U-shaped open element of this embodiment are respectively provided on the upper layer of the substrate. According to the mirror principle, the linear open element and the second U-shaped open element may both be provided on the lower layer of the substrate. It should be understood that the linear open element and the second U-shaped open element may also be provided outside the metal straight section.

[0041] Example 5 As shown in FIG. 14, in the radiating arm of this embodiment, the first U-shaped open element is linearly expanded, and the linearly expanded first U-shaped open element is referred to as the linear open element. The linear open element and the second U-shaped open element are located on both sides of the metal linear portion, and the distance between them is 0.01 to 0.03 times the wavelength of the corresponding frequency band, respectively. In this embodiment, both the linear open element and the second U-shaped open element are provided on the upper layer of the substrate. According to the mirror principle, both the linear open element and the second U-shaped open element may be provided on the lower layer of the substrate. Furthermore, it should be understood that the linear open element may be provided on the upper layer of the substrate and the second U-shaped open element on the lower layer of the substrate, or the linear open element may be provided on the lower layer of the substrate and the second U-shaped open element on the upper layer of the substrate.

[0042] In the above-mentioned Examples 4 and 5, the U-shaped open element that is expanded linearly may be a second U-shaped open element, and may be expanded into the shape of another equivalent resonant circuit in addition to being expanded linearly.

[0043] In summary, the broadband transmission / filter radiating element of the present invention has a simple structure, integrates a filter function while maintaining good transmission performance, and has important research significance and broad application prospects. Furthermore, by providing a transmission / filter element on the radiator of the radiating element, it can effectively improve the radiation pattern of the high-frequency radiating array and widen the standing wave bandwidth of the radiating element.

[0044] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered within the scope described in this specification.

[0045] The above examples merely illustrate some embodiments of the present application, and although the descriptions are specific and detailed, they should not be understood as limiting the scope of the claims of the present invention. Those skilled in the art can make various modifications and improvements without departing from the concept of the present application, and all of these are included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be governed by the scope of the attached claims.

[0046] (Addendum) (Appendix 1) The antenna includes a radiation structure and a feeding structure, the radiation structure and the feeding structure adopt a coupled feeding method so that the radiation structure radiates a low-frequency electromagnetic wave signal to the outside, and the radiation structure includes a radiator having a multilayer surface periodic structure mounted thereon; When the radiating structure operates in a first mode, an electromagnetic wave excited by the high-frequency radiating element illuminates the radiating structure, and the radiator and the multilayer surface periodic structure in the radiating structure form a spatial band-pass filter circuit of non-resonant nodes having K resonant points and K null points, where K≧1; When the radiating structure operates in a second mode, a low-frequency electromagnetic wave excites the radiating structure via the feeding structure, and the elements of the multilayer surface periodic structure are excited in parallel by the radiator to form an equivalent filter circuit; the radiator comprises four radiation arms provided on a substrate, the four radiation arms being a first radiation arm, a second radiation arm, a third radiation arm and a fourth radiation arm, the first radiation arm and the third radiation arm forming a +45° polarization of a low frequency radiation element, the second radiation arm and the fourth radiation arm forming a −45° polarization of a low frequency radiation element, a first open element and a second open element, the first open element and the second open element being located on one side or both sides of the metal straight element, and the second open element and the first open element and the second open element being located on the other side or both sides of the metal straight element, the first open element and the second open element being located on the other side or both sides of the metal straight element, the first open element and the second open element being located on the other side or both sides of the metal straight element, the first open element and the second open element being located on the other side or both sides of the metal straight element, the second open element and the second open element being located on the other side or both sides of the metal straight element, the second open element and the first ... first open element being located on the other side or both sides of the metal straight element, the second open element and the second open element being located on the other side or both sides of the metal straight element, the second open element and the first open element being located on the other side or both sides of the metal straight element, the second open element and the first open element being located on the other side or both sides of the metal straight element, the second open element and the second open element being located on the other side or both sides of the metal straight element, the second open element and the first open element being located on the other side or both sides of the metal straight element, the second open element and the second open element being located on the other side or both sides of the metal straight element, the second open element and the first open element are located on the other side or

[0047] (Appendix 2) 2. The wideband pass / filter radiating element according to claim 1, wherein the first open element and the second open element are each a U-shaped open element.

[0048] (Appendix 3) The wideband pass / filter radiating element described in Appendix 2, characterized in that when the first open element and the second open element are located on one side of the metal straight portion, the first open element is provided on the upper layer of the substrate and the second open element is provided on the lower layer of the substrate, or the first open element is provided on the lower layer of the substrate and the second open element is provided on the upper layer of the substrate.

[0049] (Appendix 4) The wideband pass / filter radiating element described in Appendix 2, characterized in that when the first open element and the second open element are located on both sides of a metal straight portion, the first open element is provided on the upper layer of the substrate and the second open element is provided on the lower layer of the substrate, or the first open element is provided on the lower layer of the substrate and the second open element is provided on the upper layer of the substrate, or both the first open element and the second open element are provided on the upper layer of the substrate, or both the first open element and the second open element are provided on the lower layer of the substrate.

[0050] (Appendix 5) 5. The wideband transmission / filter radiating element according to any one of claims 2 to 4, wherein the metal straight section has a width of 1.5 mm to 2 mm.

[0051] (Appendix 6) A wideband transmission / filter radiating element according to any one of appendices 2 to 4, characterized in that the total length of the first open element and the second open element is half the operating wavelength of the corresponding passband frequency band, the line width is 1 mm to 2 mm, the U-shaped opening width is 2 mm to 5 mm, and the distance between the first open element and the second open element and the metal straight section is 0.01 to 0.03 times the wavelength of the corresponding frequency band, respectively.

[0052] (Appendix 7) A wideband pass / filter radiating element as described in Appendix 1, characterized in that one of the first open element and the second open element is in the shape of an equivalent resonant circuit, and the other open element is a U-shaped open element.

[0053] (Appendix 8) 8. The wideband pass / filter radiating element of claim 7, wherein the equivalent resonant circuit has a linear shape and the linear open element is located inside or outside the metal straight section.

[0054] (Appendix 9) The wideband pass / filter radiating element of claim 7, characterized in that the equivalent resonant circuit has a linear shape, and the linear open element is located on the same side as the U-shaped open element, or the linear open element and the U-shaped open element are located on both sides of the metal linear portion.

[0055] (Appendix 10) The wideband pass / filter radiating element described in Appendix 9, characterized in that when the linear open element and the U-shaped open element are located on both sides of the metal linear section, the linear open element is provided on the upper layer of the substrate and the U-shaped open element is provided on the lower layer of the substrate, or the linear open element is provided on the lower layer of the substrate and the U-shaped open element is provided on the upper layer of the substrate.

[0056] (Appendix 11) the feed block faces one transmission / filter element; the first radiation arm and the third radiation arm, the length of the line connecting the power feed block and the opposite transmission / filter element is 0.44 to 0.5 times the wavelength corresponding to the operating center frequency of the low-frequency radiation element; The wideband transmission / filter radiating element according to any one of Supplementary Notes 1 to 4 and 7 to 10, wherein the length of the line connecting the power supply block and the opposite transmission / filter element in the second and fourth radiating arms is 0.22 to 0.25 times the wavelength corresponding to the operating center frequency of the low-frequency radiating element.

[0057] (Appendix 12) 12. A common aperture antenna array comprising: a first antenna, a second antenna, and a reflector, wherein the first antenna is a wideband transmission / filter radiating element according to any one of appendices 1 to 11, and the second antenna is a high-frequency radiating array, the wideband transmission / filter radiating element and the high-frequency radiating array being distributed on the reflector, and the wideband transmission / filter radiating element being disposed on the high-frequency radiating array.

[0058] (Appendix 13) The common aperture antenna array described in Appendix 12, characterized in that the common aperture antenna array has a multi-layer structure, and each layer is equipped with a resonant structure to form a multi-frequency resonant circuit, thereby achieving multi-frequency transmission / filter characteristics.

[0059] (Appendix 14) A mobile communication device comprising a wideband pass / filter radiating element according to any one of claims 1 to 11, or a common aperture antenna array according to claim 12 or 13. [Explanation of symbols]

[0060] 1 Radiating structure 11 Radiator 111 Substrate 112 First Radiating Arm 113 Second Radiating Arm 1131 Transmission / Filter Element 11311 Metal straight section 11312 1st U type open element 11313 2nd U-type open element 1132 Power Supply Block 114 Third Radial Arm 115 4th Radial Arm 12 Surface periodic structure 2 Power supply structure 3 High frequency radiating elements 4 Reflector

Claims

1. The antenna includes a radiation structure and a feeding structure, the radiation structure and the feeding structure adopt a coupled feeding method so that the radiation structure radiates a low-frequency electromagnetic wave signal to the outside, and the radiation structure includes a radiator having a multilayer surface periodic structure mounted thereon; When the radiating structure operates in a first mode, an electromagnetic wave excited by the high frequency radiating element illuminates the radiating structure, and the radiator and the multilayer surface periodic structure in the radiating structure form a spatial bandpass filter circuit of non-resonant nodes having K resonant points and K null points, where K≧1; When the radiating structure operates in a second mode, a low-frequency electromagnetic wave excites the radiating structure via the feeding structure, and the elements of the multilayer surface periodic structure are excited in parallel by the radiator to form an equivalent filter circuit; the radiator comprises four radiation arms provided on a substrate, the four radiation arms being a first radiation arm, a second radiation arm, a third radiation arm and a fourth radiation arm, the first radiation arm and the third radiation arm forming a +45° polarization of a low frequency radiation element, the second radiation arm and the fourth radiation arm forming a −45° polarization of a low frequency radiation element, a first open element and a second open element, the first open element and the second open element being located on one side or both sides of the metal straight element, and the second open element and the first open element and the second open element being located on the other side or both sides of the metal straight element, the first open element and the second open element being located on the other side or both sides of the metal straight element, the first open element and the second open element being located on the other side or both sides of the metal straight element, the first open element and the second open element being located on the other side or both sides of the metal straight element, the second open element and the second open element being located on the other side or both sides of the metal straight element, the second open element and the first ... are located on the other side or both sides of the metal straight element, the second open element and the second open element being located on the other side or both sides of the metal straight element, the

2. 2. The broadband pass / filter radiating element of claim 1, wherein the first and second open elements are each U-shaped open elements.

3. 3. The wideband pass / filter radiating element of claim 2, wherein when the first open element and the second open element are located on one side of the metal straight portion, the first open element is provided on an upper layer of the substrate and the second open element is provided on a lower layer of the substrate, or the first open element is provided on a lower layer of the substrate and the second open element is provided on an upper layer of the substrate.

4. 3. The wideband pass / filter radiating element of claim 2, wherein when the first open element and the second open element are located on both sides of a metal straight portion, the first open element is provided on an upper layer of the substrate and the second open element is provided on a lower layer of the substrate, or the first open element is provided on a lower layer of the substrate and the second open element is provided on an upper layer of the substrate, or both the first open element and the second open element are provided on an upper layer of the substrate, or both the first open element and the second open element are provided on a lower layer of the substrate.

5. 5. The wideband transmission / filter radiating element according to claim 2, wherein the width of the metal straight section is 1.5 mm to 2 mm.

6. A wideband transmission / filter radiation element according to any one of claims 2 to 4, characterized in that the total length of the first open element and the second open element is half the operating wavelength of the corresponding transmission frequency band, the line width is 1 mm to 2 mm, the U-shaped opening width is 2 mm to 5 mm, and the distance between the first open element and the second open element and the metal straight portion is 0.01 to 0.03 times the wavelength of the corresponding frequency band, respectively.

7. 2. The wideband pass / filter radiating element according to claim 1, wherein one of the first open element and the second open element is in the shape of an equivalent resonant circuit, and the other open element is a U-shaped open element.

8. 8. The wideband pass / filter radiating element according to claim 7, wherein the equivalent resonant circuit has a linear shape, and the linear open element is located inside the metal linear section or outside the metal linear section.

9. 8. The wideband pass / filter radiating element of claim 7, wherein the equivalent resonant circuit has a linear shape, and the linear open element is located on the same side as the U-shaped open element, or the linear open element and the U-shaped open element are located on both sides of the metal linear portion.

10. The wideband transmission / filter radiating element of claim 9, characterized in that when the linear open element and the U-shaped open element are located on both sides of the metal linear portion, the linear open element is provided on the upper layer of the substrate and the U-shaped open element is provided on the lower layer of the substrate, or the linear open element is provided on the lower layer of the substrate and the U-shaped open element is provided on the upper layer of the substrate.

11. the feed block faces one transmission / filter element; the first radiation arm and the third radiation arm, the length of the line connecting the power feed block and the opposite transmission / filter element is 0.44 to 0.5 times the wavelength corresponding to the operating center frequency of the low-frequency radiation element; The wideband transmission / filter radiating element according to any one of claims 1 to 4 and 7 to 10, characterized in that in the second radiation arm and the fourth radiation arm, the length of the line connecting the power supply block and the opposite transmission / filter element is 0.22 to 0.25 times the wavelength corresponding to the operating center frequency of the low-frequency radiating element.

12. 12. A common aperture antenna array comprising: a first antenna, a second antenna, and a reflector, wherein the first antenna is a broadband transmission / filter radiating element according to any one of claims 1 to 11, and the second antenna is a high frequency radiating array, the broadband transmission / filter radiating element and the high frequency radiating array being distributed on the reflector, and the broadband transmission / filter radiating element being arranged on the high frequency radiating array.

13. The common aperture antenna array according to claim 12, characterized in that the common aperture antenna array has a multi-layer structure, and each layer is equipped with a resonant structure to form a multi-frequency resonant circuit, thereby realizing multi-frequency transmission / filter characteristics.

14. A mobile communication device comprising a wideband transmission / filter radiating element according to any one of claims 1 to 11 or a common aperture antenna array according to claim 12 or 13.

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