Filters and Antenna Modules

Abstract

Provided are a filter and an antenna module which can suppress the number of filters that need to be mounted among wiring from a plurality of transceiver units to respective power supply points of a shared-polarization planar antenna. A filter (1) according to this disclosure comprises an input means (10) for inputting first and second polarization signals input from an antenna (2). The filter also comprises an output means (20) for outputting a first output signal corresponding to the first polarization signal and a second output signal corresponding to the second polarization signal, said signals having been subjected to filter processing for passing desired frequency electrical signals of the first and second polarization signals. The filter further comprises a resonator group (30) including a plurality of resonators. On the basis of the input first and second polarization signals, the resonator group excites a first excitation mode and a second excitation mode that are orthogonal to each other, thereby causing the output means (20) to output the first and second output signals which are respectively based on the first polarization signal and the second polarization signal.

Description

[Technical field]

[0001] The present disclosure relates to a filter and antenna module. [Background technology]

[0002] In recent years, integrated modules in which a planar antenna such as a patch antenna and the high-frequency part of a transmitter and receiver are mounted on both sides of a substrate have been attracting attention from the viewpoint of miniaturization. To realize an integrated module, it is necessary to mount the transmitter and receiver in an area of ​​about half the wavelength of the carrier wave, which requires the integration of multiple transmitter and receiver parts including phase shifters and filters for improving interference resistance and suppressing unwanted radiation.

[0003] Patent Document 1 discloses a technique relating to an antenna module that is provided with a filter for each path of a polarized signal for a planar antenna that supports dual polarized waves. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2019 / 054063 Summary of the Invention [Problem to be solved by the invention]

[0005] As disclosed in Patent Document 1, when a filter is provided for each path of a polarized signal in a planar antenna that supports multiple polarized waves, multiple filters are required for each antenna, which increases the number of parts used and complicates the module configuration.

[0006] The present disclosure aims to provide a filter and an antenna module for solving such problems. [Means for solving the problem]

[0007] A filter according to the present disclosure includes an input unit connected to an antenna and receiving a first polarized signal and a second polarized signal input from the antenna, an output unit that performs filtering to pass electrical signals of desired frequencies of the first polarized signal and the second polarized signal and outputs a first output signal corresponding to the first polarized signal and a second output signal corresponding to the second polarized signal, and a resonator group including a plurality of resonators. the group of resonators excites a first excitation mode and a second excitation mode which are orthogonal to each other by the input first polarized signal and the second polarized signal, and the output unit outputs the first output signal and the second output signal according to the first polarized signal and the second polarized signal, respectively.

[0008] The antenna module according to the present disclosure comprises a filter and a polarized antenna, the filter being connected to an antenna and comprising an input section for inputting a first polarized signal and a second polarized signal input from the antenna, an output section for outputting a first output signal corresponding to the first polarized signal and a second output signal corresponding to the second polarized signal after filtering to pass desired frequency electrical signals of the first polarized signal and the second polarized signal, and a resonator group comprising a plurality of resonators, the resonator group exciting a first excitation mode and a second excitation mode which are orthogonal to each other by the input first polarized signal and the second polarized signal, thereby causing the output section to output the first output signal and the second output signal corresponding to the first polarized signal and the second polarized signal, respectively. Effect of the Invention

[0009] According to the present disclosure, it is possible to provide a filter and an antenna module that can reduce the number of filters to be mounted between wiring from a plurality of transmitting / receiving units to each feeding point of a dual-polarized planar antenna. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a configuration diagram of a filter according to a first embodiment of the present disclosure. [Figure 2A] FIG. 11 is a configuration diagram of an antenna module according to a second embodiment of the present disclosure. [Figure 2B] FIG. 11 is a configuration diagram of an antenna module according to a second embodiment of the present disclosure. [Diagram 3] FIG. 11 is a configuration diagram of a filter according to a second embodiment of the present disclosure. [Figure 4] 11 is a diagram showing an outline of the entire structure of a filter formed on a laminated substrate according to a second embodiment of the present disclosure. FIG. [Figure 5A] 11 is a diagram showing an outline of the structure of each layer of a filter formed on a laminated substrate according to a second embodiment of the present disclosure. FIG. [Figure 5B] 11 is a diagram showing an outline of the structure of each layer of a filter formed on a laminated substrate according to a second embodiment of the present disclosure. FIG. [Figure 5C] 11 is a diagram showing an outline of the structure of each layer of a filter formed on a laminated substrate according to a second embodiment of the present disclosure. FIG. [Figure 6A] 13 is a diagram showing an outline of the structure of a wiring layer of a filter configured on a laminated substrate according to a second embodiment of the present disclosure. FIG. [Figure 6B] 13 is a diagram showing an outline of the structure of a wiring layer of a filter configured on a laminated substrate according to a second embodiment of the present disclosure. FIG. [Figure 7] FIG. 11 is a vector diagram of a standing wave mode of a magnetic field of a resonator according to a second embodiment of the present disclosure. [Figure 8A] FIG. 11 is a vector diagram of a standing wave mode of an electric field of a resonator according to a second embodiment of the present disclosure. [Figure 8B] FIG. 11 is a vector diagram of a standing wave mode of an electric field of a resonator according to a second embodiment of the present disclosure. [Figure 9] 13 is a vector diagram based on a simulation of a standing wave mode of a magnetic field of a resonator according to a second embodiment of the present disclosure. [Figure 10] 13 is a vector diagram obtained by simulating a standing wave mode of an electric field of a resonator according to a second embodiment of the present disclosure. [Figure 11A]FIG. 11 is a diagram showing a simulation result of a filter characteristic according to the second embodiment of the present disclosure. [Figure 11B] FIG. 11 is a diagram showing a simulation result of a filter characteristic according to the second embodiment of the present disclosure. [Figure 12] FIG. 11 is a diagram illustrating a comparison result between a filter characteristic according to the second embodiment of the present disclosure and a simulation result. [Figure 13] FIG. 11 is a diagram illustrating a simulation result of inter-port isolation characteristics of the filter according to the second embodiment of the present disclosure. [Figure 14] FIG. 11 is a configuration diagram of an antenna module according to a third embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, the embodiments will be described with reference to the drawings. Note that the drawings are simplified, and the technical scope of the embodiments should not be narrowly interpreted based on the description in the drawings. Also, the same elements are given the same reference numerals, and duplicated explanations are omitted. Note that in some of the drawings showing the filter in three dimensions, the parts that are hidden by the antenna substrate are also shown so that they can be seen in order to explain the positional relationship between the slot openings and the input / output lines that are electromagnetically coupled to the slot openings.

[0012] In the following embodiments, when necessary for convenience, the description will be divided into multiple sections or embodiments. However, unless otherwise specified, they are not unrelated to each other, and one is a partial or complete modification, application example, detailed explanation, supplementary explanation, etc. of the other. Furthermore, in the following embodiments, when the number of elements, etc. (including the number, numerical value, amount, range, etc.) is mentioned, it is not limited to the specific number, and may be more or less than the specific number, unless otherwise specified or when it is clearly limited to a specific number in principle.

[0013] Furthermore, in the following embodiments, the components (including operational steps, etc.) are not necessarily essential unless otherwise specified or considered to be clearly essential in principle. Similarly, in the following embodiments, when referring to the shape, positional relationship, etc. of the components, etc., it is intended to include those that are substantially similar or approximate to the shape, etc., unless otherwise specified or considered to be clearly not essential in principle. The same applies to the above numbers, etc. (including numbers, values, amounts, ranges, etc.).

[0014] <Research process leading to the idea of ​​the filter according to the embodiment> With the rapid spread of wireless communication, the shortage of frequency bands used for wireless communication has become an issue. Beamforming is one of the technologies that can effectively utilize frequency bands. Beamforming is a technology that radiates directional radio waves to maintain signal quality while suppressing interference with other wireless systems, enabling wireless communication with a specified communication target.

[0015] A typical method for achieving beamforming is the phased array, which is a technology that strengthens signals in a desired direction by adjusting the phase of radio signals fed to multiple planar antennas in a transmitter and combining the radio waves radiated from each planar antenna in space.

[0016] In recent years, integrated modules in which planar antennas such as patch antennas and the high-frequency parts of a transmitter and receiver are mounted on both sides of a board have been attracting attention from the perspective of miniaturization. In a phased array, it is desirable to arrange multiple planar antennas at intervals of about half the wavelength of the carrier wave in order to form a spatial beam that suppresses unnecessary radiation such as side lobes. Therefore, the higher the frequency, the shorter the interval between antennas becomes, and the smaller the integrated module described above becomes.

[0017] Taking the millimeter wave band as an example, at 30 GHz (wavelength 10 mm), it is half a wavelength of 5 mm, and at 60 GHz (wavelength 5 mm), it is half a wavelength of 2.5 mm. To realize an integrated module, it is necessary to mount a transmitter and receiver in an area of ​​about half a wavelength, which requires the integration of multiple transmitters and receivers, including phase shifters and filters to improve interference resistance and suppress unwanted radiation.

[0018] To improve communication quality, polarization diversity using two orthogonal polarized waves and polarized MIMO (multiple-input and multiple-output) are sometimes used. When two polarized waves are generated simultaneously from one planar antenna, two transmitters or receivers integrated into an integrated circuit that processes each polarized signal are connected to two feed points located at different positions on one planar antenna.

[0019] In the case of feeding a dual-polarized planar antenna, as disclosed in Patent Document 1, if an antenna module configuration is adopted in which a filter is provided for each path of a polarized signal for a dual-polarized planar antenna, two filters are required for each antenna, which increases the number of parts and complicates the module configuration. In addition, when the distance between antennas is narrow, such as in a millimeter-wave band antenna module, the spatial volume around the antenna and under the antenna surface also becomes small, which makes it difficult to mount the filter. In this case, it is possible to sacrifice the blocking characteristics and adopt a filter with low blocking characteristics, such as a planar transmission line type filter such as a microstrip filter, which has a lower Q value than a three-dimensional cavity resonator, but this reduces the degree of freedom in line design.

[0020] Therefore, a filter according to the following embodiment has been found that can solve such problems.

[0021] <Embodiment 1> The filter 1 in this embodiment will be described with reference to Fig. 1. Fig. 1 is a configuration diagram of the filter 1 in this embodiment.

[0022] The filter 1 in this embodiment is connected to an antenna 2. The filter 1 also includes an input section 10, an output section 20, and a group of resonators 30.

[0023] The input unit 10 receives a first polarized signal and a second polarized signal input from the antenna 2. The output unit 20 outputs a first output signal corresponding to the first polarized signal and a second output signal corresponding to the second polarized signal, which have been subjected to a filtering process for passing electrical signals of desired frequencies of the first polarized signal and the second polarized signal.

[0024] The resonator group 30 includes a plurality of resonators. The resonator group 30 excites a first excitation mode and a second excitation mode that are orthogonal to each other by the input first and second polarized signals, so that the output unit 20 outputs a first and a second output signal corresponding to the first and second polarized signals, respectively. Note that the first and second polarized signals may be, for example, vertically polarized and horizontally polarized, respectively, but are not limited thereto. Also, the first and second excitation modes may be, for example, TE210 and TE120 modes, respectively, but are not limited thereto.

[0025] According to the present embodiment, it is possible to provide a filter and an antenna module that can reduce the number of filters to be mounted between the wiring from a plurality of transmitting / receiving units to each feeding point of the dual-polarized planar antenna.

[0026] <Embodiment 2> The filter 100 in this embodiment will be described with reference to Fig. 2A, Fig. 2B, and Fig. 3. Fig. 2A and Fig. 2B are configuration diagrams of an antenna module 3 using the filter 100 in this embodiment. Fig. 2A shows the configuration of the antenna module 3 during transmission, and Fig. 2B shows the configuration of the antenna module 3 during reception.

[0027] The antenna module 3 in this embodiment is a dual-polarized antenna module 3 equipped with a dual-polarized filter 100. The filter 100 may share a housing constituting a resonator for two signal paths while maintaining isolation to provide independent filter functions for each path.

[0028] 2A and 2B, the filter 100 has input / output terminals as four ports. The input / output terminals connect a dual-polarized antenna 110 corresponding to two polarized waves to two input / output terminals provided near the antenna via feeders 130a, 130b, 131a, and 131b for each polarized wave. The remaining two input / output terminals may be connected to two sets of transmitting circuits including transmitting power amplifiers (PA: Power Amplifier) ​​120a and 120b, or, when applied to receiving, to two sets of receiving circuits including low noise amplifiers (LNA: Low Noise Amplifier) ​​121a and 121b.

[0029] In this embodiment, polarization 1 and polarization 2 are assigned to each signal path. Here, solid lines indicate the connection relationship of the main electromagnetic coupling corresponding to polarization 1, and dashed lines indicate the connection relationship of the main electromagnetic coupling corresponding to polarization 2. Note that polarization 1 and polarization 2 may refer to, for example, vertical polarization and horizontal polarization, respectively, but are not limited to this.

[0030] FIG. 3 is a configuration diagram of the filter 100 in this embodiment. In FIG. 3, the filter 100 in this embodiment is shown as being composed of two resonators 101 and 102. FIG. 3 also shows an example of the connection relationship of electromagnetic coupling between the resonators 101 and 102 of the filter 100. The feeder lines 130a and 130b are connected in series from the transceiver side input / output terminal, the input / output terminal to the resonators 101 and 102, and the antenna side input / output terminal in this order. Each signal line is electromagnetically coupled to the resonators 101 and 102 so as to excite two orthogonal electromagnetic resonance modes A and B in the resonators 101 and 102. The excitation mode A may be, for example, a TE210 mode, and the excitation mode B may be, for example, a TE120 mode, but is not limited thereto.

[0031] 4 to 6B show an overview of the structure of filter 100 configured on a laminated substrate. In the following, the substrate plane is defined as the xy plane of a Cartesian coordinate system, and the substrate lamination direction is defined as the z-axis positive direction, but this changes depending on the orientation in which filter 100 is arranged.

[0032] 4, the filter 100 may have a laminated structure of a substrate including a wiring layer 140a, resonators 101 and 102, and a wiring layer 140b. The wiring layer 140a includes input / output terminals for the antenna 110 and the resonator 101. The wiring layer 140b includes input / output terminals for the downstream transmission / reception circuit and the resonator 102.

[0033] The resonators 101 and 102 may be rectangular resonators formed on a laminate substrate and configured with a substrate integrated wall (SIW) using a via hole array (or post) as an electrical boundary wall (or post wall). In addition, when the resonators 101 and 102 are configured with a metal housing, they may be hollow rectangular resonators with the metal wall surface as the electrical boundary wall.

[0034] 5A, 5B, and 5C show schematic diagrams of the arrangement and shape of coupling slots provided in the resonators 101 and 102 of the filter 100 provided immediately below the antenna surface. In this embodiment, the slot openings 150a and 150b are provided on the upper surface of the resonator 101 close to the antenna substrate surface, and are rectangular in shape and arranged at positions where the long sides are perpendicular to each other on the upper surface of the rectangular parallelepiped resonator. As shown in FIG. 6A, the feed lines 130a and 130b are electromagnetically coupled to the slot openings 150a and 150b, respectively, and excite different orthogonal excitation modes in the resonator 101. Specifically, in a rectangular waveguide resonator having square upper and lower surfaces, the TE210 mode and the TE120 mode can be used as orthogonal excitation modes.

[0035] In addition, rectangular slot openings 151a, 151b, 152a, and 152b are provided between the resonators 101 and 102 for inter-resonator coupling. The slot opening pairs (151a, 152a) and (151b, 152b) mainly contribute to the slot openings for exciting the TE210 mode and the TE120 mode and to each polarized signal path, respectively. That is, when one slot opening is closed, only one excitation mode acts, and only one polarized signal propagates.

[0036] Similarly, rectangular slot openings 153a and 153b are provided in the resonator 102, on the lower surface side where the signal lines connecting the transmitting and receiving circuits are provided, with the long sides being perpendicular to each other. In Fig. 5C, the slot opening 153b is provided near the center of the resonator 102, but it may be provided anywhere, such as near the long side like the slot opening 150b, depending on the desired filter characteristics.

[0037] 6B, similarly to the wiring layer 140a on the upper surface side of the filter 100, the power feed lines 131a and 131b may be provided on the lower surface of the wiring layer 140b, and the power feed lines 131a and 131b may be electromagnetically coupled to the slot openings 153a and 153b via the wiring layer 140b. In this case, different orthogonal excitation modes are excited in the resonator 102. Specifically, in a rectangular resonator having square flat plate-like upper and lower surfaces, the TE210 mode and the TE120 mode can be used as orthogonal excitation modes.

[0038] 7 to 10 show vector diagrams of standing wave modes of electromagnetic fields in xy cross sections when the square planar plate-like resonators 101 and 102 used in FIGS. 4 to 6B are configured on a dielectric multilayer substrate.

[0039] In FIG. 7, magnetic field vectors 201 and 202 during excitation of the TE210 mode and the TE120 mode are shown by solid lines and dashed lines, respectively.

[0040] 8A and 8B show the regions where the electric field vectors 203 and 204 are oriented in the same direction when the TE210 mode and the TE120 mode are excited, respectively, by solid and dashed lines, and the electric field vector directions at any time are shown by crosses (× marks in circles) for the -z direction and dots (● marks) for the +z direction. The electric field vector directions change with the period of the signal frequency.

[0041] Fig. 9 shows the state of magnetic field vectors at the time of excitation in the TE210 mode and the TE120 mode by electromagnetic field simulation of a bandpass filter (BPF) according to this embodiment, which is configured with a dielectric multilayer substrate. Fig. 10 similarly shows the state of electric field vectors at the time of excitation in the TE210 mode and the TE120 mode by electromagnetic field simulation. Both modes are orthogonal to each other, and if these modes are used for signal transmission corresponding to each polarization, it becomes possible to transmit signals independently while maintaining high isolation.

[0042] 11A and 11B respectively show the results of simulating the filter characteristics of each signal line in the filter structure shown in Fig. 4 to Fig. 6B. The resonator model used in the simulation was a square with each side having a length of approximately half a wavelength or less in the xy plane, and had a layer thickness of approximately 100 um to 200 um in the lamination direction in the positive direction of the z axis. These values ​​may be changed as appropriate depending on the filter characteristics and manufacturing specifications.

[0043] The transmission coefficients of the S parameters, which are characteristics of the high-frequency circuit using the filter in this embodiment, are denoted as S21 and S43. S21 is for the TE210 mode, and S43 is for the TE120 mode. The transmission coefficients S21 and S43 were simulated with a passband frequency of around 39 GHz and a transmission zero point, i.e., an attenuation pole, of 35 GHz.

[0044] In designing the filter characteristics, we applied a (1+1)th order generalized Chebyshev characteristic that explicitly assigns one of the two orders of the filter with a two-stage resonator configuration to the order of the transmission zero. Here, the generalized Chebyshev characteristic is a general term for bandpass filter characteristics with asymmetrical pass characteristics, in which an asymmetrical transmission zero is placed in the Chebyshev characteristic with in-band equiripple characteristics.

[0045] In addition, to provide such a transmission zero point in a filter, it is necessary to provide a separate resonator for a bypass path of the signal in the resonator group, and configure inter-resonator coupling called a jump coupling. However, such structural constraints become more difficult when high integration is required, such as in a millimeter-wave antenna array module.

[0046] Therefore, in this embodiment, for the signal transmission of the first polarized signal and the second polarized signal, a coupling having frequency dependency is used, which is a filter configuration technique capable of generating a transmission zero point while maintaining a simple series coupling without providing a detour. Specifically, by providing two slot sets of openings, namely, the slot opening set 151a, 152a and the slot opening set 151b, 152b, mainly between the resonator 101 and the resonator 102, it is possible to finely adjust the coupling amount.

[0047] In 5G millimeter wave communication using 39 GHz band transmission, an issue arises in an integrated circuit module when the local signal is set to, for example, 35 GHz due to local signal leakage. According to this embodiment, the unwanted wave signal of a specific frequency such as the local signal leakage signal can be effectively reduced by a filter outside the integrated circuit at the set transmission zero point, and therefore, this embodiment is also suitable for application to a general-purpose millimeter wave integrated circuit.

[0048] Figure 12 shows the analytical solution based on the theoretical formula for the (1+1)-order generalized Chebyshev bandpass filter, as well as the transmission characteristics of an electromagnetic field simulation when the dielectric loss and conduction loss are ideally set to zero. The transmission zero frequency was set to 35 GHz, the same as in Figure 11. As the two graphs are roughly consistent, it can be said that the characteristics are almost exactly as designed.

[0049] 13 is a diagram showing an example of electromagnetic field simulation of the inter-port isolation characteristics of the filter for each signal line according to this embodiment. Since the unnecessary inter-port isolations, which are the transmission coefficients S31, S32, S41, and S42 other than the main paths S21 and S43, are maintained at 20 dB or more, it can be said that independent operation can be realized in each main signal path.

[0050] In this embodiment, the filter structure when two orthogonal excitation modes (electromagnetic field eigenmodes) are used has been described, so the number of ports is set to four. However, if multiple orthogonal N (N: natural number) excitation modes can be used, the number of ports may be 2N.

[0051] As described above, in this embodiment, excitation is performed in different orthogonal excitation modes depending on the signal, and each excitation mode is assigned as a path for two signals, such as a dual-polarized signal. Then, by configuring inter-resonator coupling, it becomes possible to realize two independent filter characteristics while sharing the resonator housing.

[0052] According to the present disclosure, it is possible to provide a filter and an antenna module that can reduce the number of filters to be mounted between wiring from a plurality of transmitting / receiving units to each feeding point of a dual-polarized planar antenna.

[0053] <Embodiment 3> The antenna module 3 in this embodiment will be described with reference to Fig. 14. Fig. 14 is a configuration diagram of the antenna module 3 in this embodiment. The antenna module 3 shown in Fig. 14 is configured in an array of antennas 110b, 110c, and 110d, each of which is identical to an antenna 110a as a dual-polarized antenna element, with each antenna being approximately half the wavelength of the carrier wave. λ in Fig. 14 indicates the wavelength of the carrier wave. Note that in Fig. 14, the feeder line 130 and the like are omitted in order to simplify the drawing.

[0054] Although FIG. 14 illustrates the configuration having four antennas 110a to 110d, any number of antennas may be provided as long as the number is appropriate for desired characteristics such as the beam width of the carrier wave.

[0055] A plurality of resonators 101a to 101d constituting the filter 100 shown in the second embodiment are provided as a resonator group on the lower surface of the antennas 110a to 110d. That is, the resonator group of the filter 100 is designed to excite two orthogonal excitation modes and to use each excitation mode for each signal transmission of both polarized signals. Note that, although the resonator group has been described in this embodiment as having four resonators 101a to 101d, any number of resonators can be set as long as it is an appropriate value according to desired characteristics such as beam width.

[0056] As illustrated in the second embodiment, when the length of each side of the rectangular part on the substrate plane of the rectangular resonator group is set to λ / 2 or less, the same filter housing is shared, high isolation is maintained for each polarized signal, and independent signal transmission is possible. This makes it possible to reduce the filter size and mount the filter on the array in a compact manner just below the dual polarized antenna array, similar to the antenna elements.

[0057] The present disclosure is not limited to the above-described embodiment, and can be modified as appropriate without departing from the spirit and scope of the present disclosure.

[0058] A part or all of the above-described embodiments can be described as, but is not limited to, the following supplementary notes. (Appendix 1) an input unit connected to an antenna and configured to input a first polarized signal and a second polarized signal input from the antenna; an output unit that outputs a first output signal corresponding to the first polarized signal and a second output signal corresponding to the second polarized signal, the first output signal and the second output signal being obtained by performing a filtering process to pass electrical signals of desired frequencies of the first polarized signal and the second polarized signal; A resonator group including a plurality of resonators; Equipped with the group of resonators excites a first excitation mode and a second excitation mode that are orthogonal to each other by the input first polarized signal and the input second polarized signal, so that the output unit outputs the first output signal and the second output signal according to the first polarized signal and the second polarized signal, respectively. filter. (Appendix 2) the input unit includes a first port for inputting the first polarized signal and a second port for inputting the second polarized signal; The output unit includes a third port that outputs a first output signal corresponding to the first polarized signal, and a fourth port that outputs a second output signal corresponding to the second polarized signal. The filter described in Appendix 1. (Appendix 3) The resonator group includes a first resonator connected to the input section and a second resonator connected to the output section. 3. The filter according to claim 1 or 2. (Appendix 4) The first resonator comprises: a first slot opening having a rectangular shape; a second slot opening having a rectangular shape and a long side perpendicular to a long side of the first slot opening; a first feed line that propagates the first polarized signal and is electromagnetically coupled to the first slot opening; a second feed line that propagates the second polarized signal and is electromagnetically coupled to the second slot opening; 4. The filter of claim 3, comprising: (Appendix 5) The second resonator comprises: a third slot opening having a rectangular shape; and a fourth slot opening having a rectangular shape and a long side perpendicular to a long side of the third slot opening; a third feed line that propagates an output signal corresponding to the first polarized signal and is electromagnetically coupled to the third slot opening; a fourth feed line that propagates an output signal corresponding to the second polarized signal and is electromagnetically coupled to the fourth slot opening; 5. The filter according to claim 3 or 4, comprising: (Appendix 6) the first resonator and the second resonator are electromagnetically coupled in series; The filter according to any one of claims 3 to 5. (Appendix 7) the series combination has a frequency dependency and has at least one transmission zero for each frequency of the first polarization signal and the second polarization signal; The filter described in Appendix 6. (Appendix 8) The first excitation mode is a TE210 mode, and the second excitation mode is a TE120 mode. The filter according to any one of claims 1 to 7. (Appendix 9) The resonator group has a via hole array formed on a laminated substrate as an electrical boundary wall. The filter according to any one of claims 1 to 8. (Appendix 10) the first polarized signal is horizontally polarized and the second polarized signal is vertically polarized; The filter according to any one of claims 1 to 9. (Appendix 11) The output unit is connected to an LNA (Low Noise Amplifier). The filter according to any one of claims 1 to 10. (Appendix 12) Equipped with filters and polarized antennas, The filter comprises: an input unit connected to an antenna and configured to input a first polarized signal and a second polarized signal input from the antenna; an output unit that outputs a first output signal corresponding to the first polarized signal and a second output signal corresponding to the second polarized signal, the first output signal and the second output signal being obtained by performing a filtering process to pass electrical signals of desired frequencies of the first polarized signal and the second polarized signal; A resonator group including a plurality of resonators; Equipped with the group of resonators excites a first excitation mode and a second excitation mode that are orthogonal to each other by the input first polarized signal and the input second polarized signal, so that the output unit outputs the first output signal and the second output signal according to the first polarized signal and the second polarized signal, respectively. Antenna module. (Appendix 13) the input unit includes a first port for inputting the first polarized signal and a second port for inputting the second polarized signal; The output unit includes a third port that outputs a first output signal corresponding to the first polarized signal, and a fourth port that outputs a second output signal corresponding to the second polarized signal. 13. The antenna module of claim 12. (Appendix 14) The resonator group includes a first resonator connected to the input section and a second resonator connected to the output section. 14. The antenna module according to claim 12 or 13. (Appendix 15) The first resonator comprises: a first slot opening having a rectangular shape; a second slot opening having a rectangular shape and a long side perpendicular to a long side of the first slot opening; a first feed line that propagates the first polarized signal and is electromagnetically coupled to the first slot opening; a second feed line that propagates the second polarized signal and is electromagnetically coupled to the second slot opening; 15. The antenna module of claim 14, comprising: (Appendix 16) The second resonator comprises: a third slot opening having a rectangular shape; and a fourth slot opening having a rectangular shape and a long side perpendicular to a long side of the third slot opening; a third feed line that propagates an output signal corresponding to the first polarized signal and is electromagnetically coupled to the third slot opening; a fourth feed line that propagates an output signal corresponding to the second polarized signal and is electromagnetically coupled to the fourth slot opening; 16. The antenna module according to claim 14 or 15, comprising: (Appendix 17) the first resonator and the second resonator are electromagnetically coupled in series; 17. The antenna module according to any one of claims 14 to 16. (Appendix 18) the series combination has a frequency dependency and has at least one transmission zero for each frequency of the first polarization signal and the second polarization signal; 18. The antenna module of claim 17. (Appendix 19) The first excitation mode is a TE210 mode, and the second excitation mode is a TE120 mode. The antenna module according to any one of claims 12 to 18. (Appendix 20) The resonator group has a via hole array formed on a laminated substrate as an electrical boundary wall. 20. The antenna module according to any one of claims 12 to 19. (Appendix 21) the first polarized signal is horizontally polarized and the second polarized signal is vertically polarized; The antenna module according to any one of claims 12 to 20. (Appendix 22) The output unit is connected to an LNA (Low Noise Amplifier). 22. The antenna module according to claim 12, wherein the first and second electrodes are arranged in a first direction.

[0059] Although the present invention has been described above with reference to the embodiment, the present invention is not limited to the above. Various modifications that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the invention.

[0060] This application claims priority based on Japanese Patent Application No. 2021-016337, filed on February 4, 2021, the disclosure of which is incorporated herein in its entirety. [Explanation of symbols]

[0061] 100 Filters 2, 110, 110a, 110b, 110c, 110d antennas 3 Antenna Module 10 Input section 20 Output section 30 resonator group 101, 101a, 101b, 101c, 101d, 102 resonator 120a, 120b PA 121a, 121b LNAs 130a, 130b, 131a, 131b feed line 140a, 140b wiring layer 150a, 150b, 151a, 151b, 152a, 152b, 153a, 153b Slot openings 201, 202 Magnetic field vector 203, 204 Electric field vector

Claims

1. an input means connected to an antenna for inputting a first polarized signal and a second polarized signal input from the antenna; an output means for outputting a first output signal corresponding to the first polarized signal and a second output signal corresponding to the second polarized signal, the first output signal and the second output signal being obtained by performing a filtering process for passing electrical signals of a desired frequency of the first polarized signal and the second polarized signal; A resonator group including a plurality of resonators; Equipped with the group of resonators excites a first excitation mode and a second excitation mode which are orthogonal to each other by the input first polarization signal and the input second polarization signal, so that the output means outputs the first output signal and the second output signal according to the first polarization signal and the second polarization signal, respectively; the group of resonators includes a first resonator connected to the input means and a second resonator connected to the output means; The first resonator comprises: a first slot opening having a rectangular shape; a second slot opening having a rectangular shape and a long side perpendicular to a long side of the first slot opening; a first feed line that propagates the first polarized signal and is electromagnetically coupled to the first slot opening; a second feed line that propagates the second polarized signal and is electromagnetically coupled to the second slot opening. filter.

2. the input means includes a first port for inputting the first polarized signal and a second port for inputting the second polarized signal; the output means includes a third port for outputting a first output signal corresponding to the first polarized signal, and a fourth port for outputting a second output signal corresponding to the second polarized signal; The filter of claim 1 .

3. The second resonator includes: a third slot opening having a rectangular shape; and a fourth slot opening having a rectangular shape and a long side perpendicular to a long side of the third slot opening; a third feed line that propagates an output signal corresponding to the first polarized signal and is electromagnetically coupled to the third slot opening; a fourth feed line that propagates an output signal corresponding to the second polarized signal and is electromagnetically coupled to the fourth slot opening; The filter according to claim 1 or 2, comprising:

4. the first resonator and the second resonator are electromagnetically coupled in series; The filter according to any one of claims 1 to 3.

5. the series combination has a frequency dependency and has at least one transmission zero for each frequency of the first polarization signal and the second polarization signal.

5. The filter of claim 4.

6. The resonator group has a via hole array formed on a laminated substrate as an electrical boundary wall. A filter according to any one of claims 1 to 5.

7. An input means connected to an antenna for inputting a first polarized signal and a second polarized signal input from the antenna; an output means for outputting a first output signal corresponding to the first polarized signal and a second output signal corresponding to the second polarized signal, the first output signal and the second output signal being obtained by performing a filtering process for passing electrical signals of a desired frequency of the first polarized signal and the second polarized signal; A resonator group including a plurality of resonators; Equipped with the group of resonators excites a first excitation mode and a second excitation mode which are orthogonal to each other by the input first polarization signal and the input second polarization signal, so that the output means outputs the first output signal and the second output signal according to the first polarization signal and the second polarization signal, respectively; the group of resonators includes a first resonator connected to the input means and a second resonator connected to the output means; The second resonator includes: a third slot opening having a rectangular shape; and a fourth slot opening having a rectangular shape and a long side perpendicular to a long side of the third slot opening; a third feed line that propagates an output signal corresponding to the first polarized signal and is electromagnetically coupled to the third slot opening; a fourth feed line that propagates an output signal corresponding to the second polarized signal and is electromagnetically coupled to the fourth slot opening. filter.

8. An input means connected to an antenna for inputting a first polarized signal and a second polarized signal input from the antenna; an output means for outputting a first output signal corresponding to the first polarized signal and a second output signal corresponding to the second polarized signal, the first output signal and the second output signal being obtained by performing a filtering process for passing electrical signals of a desired frequency of the first polarized signal and the second polarized signal; A resonator group including a plurality of resonators; Equipped with the group of resonators excites a first excitation mode and a second excitation mode which are orthogonal to each other by the input first polarization signal and the input second polarization signal, so that the output means outputs the first output signal and the second output signal according to the first polarization signal and the second polarization signal, respectively; The resonator group has a via hole array formed on a laminated substrate as an electrical boundary wall. filter.

9. Equipped with filters and polarized antennas, The filter comprises: an input means connected to an antenna for inputting a first polarized signal and a second polarized signal input from the antenna; an output means for outputting a first output signal corresponding to the first polarized signal and a second output signal corresponding to the second polarized signal, the first output signal and the second output signal being obtained by performing a filtering process for passing electrical signals of a desired frequency of the first polarized signal and the second polarized signal; A resonator group including a plurality of resonators; Equipped with the group of resonators excites a first excitation mode and a second excitation mode which are orthogonal to each other by the input first polarization signal and the input second polarization signal, so that the output means outputs the first output signal and the second output signal according to the first polarization signal and the second polarization signal, respectively; the group of resonators includes a first resonator connected to the input means and a second resonator connected to the output means; The first resonator comprises: a first slot opening having a rectangular shape; a second slot opening having a rectangular shape and a long side perpendicular to a long side of the first slot opening; a first feed line that propagates the first polarized signal and is electromagnetically coupled to the first slot opening; a second feed line that propagates the second polarized signal and is electromagnetically coupled to the second slot opening. Antenna module.

10. A filter and a polarized antenna, The filter comprises: an input means connected to an antenna for inputting a first polarized signal and a second polarized signal input from the antenna; an output means for outputting a first output signal corresponding to the first polarized signal and a second output signal corresponding to the second polarized signal, the first output signal and the second output signal being obtained by performing a filtering process for passing electrical signals of a desired frequency of the first polarized signal and the second polarized signal; A resonator group including a plurality of resonators; Equipped with the group of resonators excites a first excitation mode and a second excitation mode which are orthogonal to each other by the input first polarization signal and the input second polarization signal, so that the output means outputs the first output signal and the second output signal according to the first polarization signal and the second polarization signal, respectively; The resonator group has a via hole array formed on a laminated substrate as an electrical boundary wall. Antenna module.

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