Filtering antenna, filtering antenna debugging system and debugging tool

Abstract

The invention relates to the field of communication, and discloses a filtering antenna, a filtering antenna debugging system and a debugging tool. According to the filtering antenna structure, the coupling port is introduced into the antenna radiation part of the filtering antenna or the resonator connected with the antenna, and the coupling port couples the signal from the antenna or the resonator to serve as the second port information of the filtering antenna; and forming a two-port network coupling matrix by the second port information and the first port information of the feed port of the filtering antenna. And commissioning of resonant frequency and coupling of the resonator part and the antenna part of the filtering antenna is guided through the coupling matrix. According to the filtering antenna structure, the second port information obtained through the coupling port and the first port information of the feed port can form the two-port network coupling matrix, so that the filtering antenna can be debugged like debugging a common filter structure, the debugging process is convenient and rapid, and the filtering antenna structure is suitable for the filtering antenna with a transmission zero point.

Description

Technical Field

[0001] The present application relates to the field of communications, and in particular to a filtering antenna, a filtering antenna debugging system, and a debugging tool. Background Art

[0002] In wireless communication systems, filters and antennas are important RF front-end components. Among them, filters can eliminate interference and clutter in the receiving and transmitting channels, allowing signals within the working frequency band to pass without attenuation as much as possible, and attenuating signals outside the working frequency band as much as possible, thereby achieving accurate frequency selection. In the RF front-end of traditional communication systems, antennas and filters are generally designed and manufactured separately, each matched with the load, and then cascaded into one. Therefore, the interconnected transmission lines will bring additional losses.

[0003] At present, the filter antenna technology integrates the antenna and the filter into an integrated design, and directly uses the antenna as the load or the last resonator of the filter, eliminating the transmission line loss in the middle. However, the integrated filter antenna has only one feeding port (its output port is the antenna), and it cannot be designed and debugged using a two-port network like an ordinary filter, resulting in a cumbersome design and debugging process for the filter antenna. Summary of the invention

[0004] The embodiments of the present application provide a filtering antenna, a filtering antenna debugging system, and a debugging tool.

[0005] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, an embodiment of the present application discloses a filtering antenna, comprising an antenna, a coupling component, a resonator and a coupling port; the resonator is coupled to the antenna through the coupling component; the antenna is coupled to the coupling port; or, the resonator is coupled to the coupling port.

[0007] The minimum unit of the above-mentioned filtering antenna may include, for example, a resonator and an antenna, and the resonator and the antenna are coupled and connected along a first direction through a coupling component, and the coupling component is placed between the antenna and the resonator. The coupling port can be connected to the antenna, or the coupling port is connected to the resonator. The filtering antenna has a feeding port. When debugging the filtering antenna, the first port information of the feeding port of the filtering antenna and the second port information coupled out of the coupling port can form a two-port network coupling matrix. The debugging of the filtering antenna is guided based on the coupling matrix. The debugging process of the filtering antenna guided by the coupling matrix of the two-port network is simple and fast, and is suitable for the case where the filtering antenna has a transmission zero point. In addition, the filtering antenna of the embodiment of the present application can be debugged again through the coupling port after processing.

[0008] In addition, in some other embodiments, the filtering antenna may further include a plurality of resonators, wherein a coupling port may be provided on the resonator coupled to the antenna.

[0009] In a possible implementation of the first aspect, the antenna includes a first metallized surface and a second metallized surface disposed back to back, wherein the first metallized surface is a radiation surface; and the coupling port is a first slot, which is opened on the second metallized surface.

[0010] The first metallized surface and the second metallized surface of the antenna are, for example, arranged opposite to each other along a second direction, and the second direction may be, for example, the height direction of the antenna. The coupling port is a first slot provided on the second metallized surface, and the signal of the antenna can be radiated from the first slot, and the first slot may be, for example, a ring slot or a strip slot. The first slot may be provided at the center of the second metallized surface, or at a position deviated from the center of the second metallized surface.

[0011] In this embodiment, the coupling port is a gap opened on the second metallized surface. Therefore, when debugging the filter antenna, the filter antenna can be directly placed on the debugging tool, thereby improving the accuracy of debugging the filter antenna.

[0012] In a possible implementation of the first aspect, the antenna includes a first metallized surface and a non-metallized surface, wherein the first metallized surface is a radiation surface; and the coupling port is a metal strip, and the metal strip is attached to the non-metallized surface.

[0013] The coupling port is a metal strip, which is attached to the side wall of the antenna, the side wall of the antenna includes a direction parallel to the second direction, and the metal strip is arranged along the second direction. The surface of the antenna attached with the metal strip is a non-metallized surface.

[0014] In addition, the metal strip can also be attached to the surface of the antenna opposite to the first metallized surface along the second direction, and this surface can also be called the bottom surface of the antenna. One end of the metal strip is flush with the edge of the bottom surface of the antenna.

[0015] In this embodiment, the metal strip is attached to the antenna part of the filter antenna. After the antenna is debugged, the metal strip can be removed, thereby not affecting the use of the filter antenna.

[0016] In a possible implementation of the first aspect, the coupling port is a second slot, and the second slot is opened on the surface of the resonator.

[0017] The coupling port is provided on the surface of the resonator, and the surface of the resonator is metallized. Along the second direction, a coupling blind hole is provided on the upper surface of the resonator, and a second slit is provided on the surface of the resonator opposite to the upper surface along the second direction (or referred to as the lower surface of the resonator), and the second slit serves as a coupling port coupled with the resonator. The second slit can be provided at the center of the lower surface of the resonator, or at a position deviated from the center.

[0018] In addition, the second gap may be opened on the side of the resonator without affecting the use of the resonator. The side of the resonator may include, for example, a surface of the resonator parallel to the second direction.

[0019] In a possible implementation of the first aspect, the coupling port is a metal strip; the surface of the resonator includes a non-metallized area, and the metal strip is attached to the non-metallized area.

[0020] The coupling port is arranged on the resonator, and the coupling port is a metal strip. The exposed surface of the resonator is a metalized surface. However, the surface of the resonator where the metal strip is arranged can retain a non-metalized area, and the resonator transmits the signal from the non-metalized area so that the metal strip couples the signal of the resonator.

[0021] In a second aspect, an embodiment of the present application discloses a filtering antenna debugging system, comprising: a debugging tool and the filtering antenna of any one of claims 1 to 5; the debugging tool comprises a debugging floor and a connector; the filtering antenna is arranged on the debugging floor; the connector is coupled and connected to the coupling port of the filtering antenna.

[0022] The above debugging tooling includes a debugging floor and a connector. Along the second direction, such as the thickness direction of the debugging floor, the debugging floor includes an upper surface and a lower surface. The connector can be fixed to the lower surface of the debugging floor, and the fixing method of the connector and the debugging floor includes welding or bolting.

[0023] When debugging the filter antenna, the filter antenna is placed on the upper surface of the debugging floor, and the connector is coupled to the coupling port of the filter antenna, so as to obtain the coupling signal of the filter antenna through the coupling port. The coupling signal can be used as the second port signal and the first port signal at the feeding port of the filter antenna to form a two-port network coupling matrix, and the debugging of the filter antenna is guided by the coupling matrix.

[0024] In a possible implementation of the second aspect, when the coupling port is the first slot or the second slot, the debugging floor is provided with a third slot matching the first slot or the second slot, and the connector is coupled to the coupling port through the third slot.

[0025] In a possible implementation of the second aspect, the connector and the filtering antenna are located on opposite sides of the debugging floor, and a coaxial probe is also provided on the connector. The coaxial probe is inserted into the antenna through the first slot, or the coaxial probe is inserted into the resonator through the second slot.

[0026] When debugging the above-mentioned filtering antenna, if the coupling port on the filtering antenna is the first slot or the second slot, a corresponding third slot will be opened on the debugging floor, and the third slot runs through the debugging floor along the second direction. The third slot matches the first slot or the second slot, for example, the third slot is equal in size and shape to the first slot or the second slot, and the projection along the second direction overlaps. The third slot is opposite to the first slot or the second slot, for example, the projection along the second direction overlaps, so that the coupling signal can be transmitted from the third slot.

[0027] In addition, the connector is fixed at the position of the third slot on the lower surface of the debugging floor, and when the coupling port is the first slot, the signal at the antenna is transmitted to the connector through the first slot and the third slot, thereby obtaining the coupling signal at the antenna through the connector. When the coupling port is the second slot, the signal at the resonator is transmitted to the connector through the second slot and the third slot, thereby obtaining the coupling signal at the resonator.

[0028] In addition, a coaxial probe may be arranged on the connector, and the coaxial probe may be inserted into the antenna through the first slot along the second direction, thereby guiding the signal at the antenna to the connector to obtain a coupled signal. Alternatively, the coaxial probe may be inserted into the resonator through the second slot along the second direction, thereby guiding the signal at the resonator to the connector to obtain a coupled signal.

[0029] In a possible implementation of the second aspect, the debugging floor is provided with a microstrip line, the third gap exposes the microstrip line, and the connector is connected to the microstrip line.

[0030] In the above debugging system, a microstrip line can be arranged on the lower surface of the debugging floor, the third slot exposes the microstrip line, the signal at the antenna can be transmitted to the microstrip line through the first slot and the third slot, the microstrip line transmits the signal to the connector, thereby obtaining a coupled signal at the antenna. Alternatively, the signal at the resonator can be transmitted to the microstrip line through the second slot and the third slot, the microstrip line transmits the signal to the connector, thereby obtaining a coupled signal at the resonator.

[0031] In addition, the microstrip line may also be disposed inside the lower test floor as long as the third gap can expose the microstrip line.

[0032] In this embodiment, obtaining the coupling signal through the microstrip line does not limit the position of the connector, that is, the connector can be placed at any position. In addition, the microstrip line is more convenient for obtaining the coupling signal, thereby facilitating the debugging process of the filtering antenna.

[0033] In a possible implementation of the second aspect, when the coupling port is a metal strip, the debugging floor is provided with a microstrip line, the microstrip line is in contact with the metal strip, and the connector is connected to the microstrip line.

[0034] In the above debugging system, when the coupling port is a metal strip, a microstrip line connected to the metal strip is provided on the debugging tooling, and the microstrip line can transmit the signal coupled out of the metal strip to the connector, thereby obtaining a coupled signal.

[0035] In addition, the microstrip line and the metal strip may be vertically connected, for example, the metal strip and the microstrip line are L-shaped, or the metal strip and the microstrip line extend along the first direction.

[0036] On the third aspect, an embodiment of the present application discloses a debugging tool for a filtering antenna, wherein the filtering antenna includes an antenna, a coupling component, and a resonator, wherein the resonator is coupled to the antenna through a coupling component; the debugging tool includes a debugging floor, a connector, and a coupling port; the coupling port is used to couple with the antenna, and the connector is coupled to the coupling port.

[0037] The above-mentioned debugging tooling is provided with a coupling port, which can be, for example, a slot or a microstrip line structure. When debugging the filtering antenna, the coupling port can couple a signal from the antenna of the filtering antenna as a second port signal. The second port signal and the first port signal of the feeding port part of the filtering antenna form a two-port network coupling matrix. Based on the coupling matrix, the debugging of the filtering antenna can be guided.

[0038] In a possible implementation of the third aspect, the debugging floor is a metal floor, and the coupling port is a fourth slit opened on the surface of the metal floor.

[0039] In a possible implementation of the third aspect, a coaxial probe is provided on the connector, and the coaxial probe passes through the fourth slit to contact the non-metallized side surface of the antenna.

[0040] The above-mentioned debugging floor is a metal floor, and a fourth slit is provided on the debugging floor. The fourth slit extends in the second direction, that is, the thickness direction of the debugging floor, and passes through the debugging floor. The fourth slit serves as a coupling port on the debugging floor. The fourth slit may be the same as the third slit in the following text. The connector is fixed on the lower surface of the debugging floor. A coaxial probe is provided on the connector, and the coaxial probe extends in the second direction through the debugging floor and contacts the surface of the filtering antenna. The surface of the filtering antenna in contact with the coaxial probe is a non-metallized surface. The coaxial probe guides the signal at the antenna to the connector, so that the connector obtains the coupled signal at the antenna. In other embodiments, the coaxial probe may not be provided on the connector.

[0041] In a possible implementation of the third aspect, the debugging floor is a non-metal floor, the coupling port is a microstrip line, and the microstrip line is arranged on the surface of the non-metal floor.

[0042] The above-mentioned debugging floor is a non-metalized floor, and the coupling port on the debugging tool is a microstrip line. The microstrip line is arranged on the upper surface of the non-metalized floor. When debugging the filter antenna, the antenna part of the filter antenna is placed on the microstrip line, and the surface where the filter antenna contacts the microstrip line is a non-metalized surface. The microstrip line couples the signal at the antenna and transmits the signal to the connector, thereby obtaining the coupled signal at the antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 According to some embodiments of the present application, a schematic structural diagram of a wireless communication base station is shown;

[0044] Figure 2 According to some embodiments of the present application, a topological structure of a filtering antenna is shown. Figure 1 ;

[0045] Figure 3a According to some embodiments of the present application, a topological structure of a filtering antenna is shown. Figure 2 ;

[0046] Figure 3b According to some embodiments of the present application, a topological structure of a filtering antenna is shown in Figure 3;

[0047] Figure 4a According to some embodiments of the present application, a three-dimensional filtering antenna is shown. Figure 1 ;

[0048] Figure 4b According to some embodiments of the present application, a partial cross-sectional view of a filtering antenna is shown;

[0049] Figure 4c According to some embodiments of the present application, a structural diagram of an annular gap is shown;

[0050] Figure 4d According to some embodiments of the present application, a structural diagram of a strip-shaped gap is shown;

[0051] Figure 5 According to some embodiments of the present application, a structural diagram of a debugging tool is shown;

[0052] Figure 6a According to some embodiments of the present application, a stereoscopic view of a filtering antenna debugging system is shown. Figure 1 ;

[0053] Figure 6bAccording to some embodiments of the present application, a partial cross-sectional view of a filtering antenna debugging system is shown. Figure 1 ;

[0054] Figure 7a According to some embodiments of the present application, a stereoscopic view of a filtering antenna debugging system is shown. Figure 2 ;

[0055] Figure 7b According to some embodiments of the present application, a partial cross-sectional view of a filtering antenna debugging system is shown. Figure 2 ;

[0056] Figure 8a According to some embodiments of the present application, a three-dimensional diagram of a filter antenna debugging system is shown;

[0057] Figure 8b According to some embodiments of the present application, a perspective view of a filtering antenna debugging system is shown in FIG4 ;

[0058] Figure 9a According to some embodiments of the present application, a topology structure 4 of a filtering antenna is shown;

[0059] Figure 9b According to some embodiments of the present application, a stereoscopic diagram of a wave antenna debugging system is shown. Figure 5 ;

[0060] Fig.9c According to some embodiments of the present application, a partial cross-sectional view three of a filtering antenna debugging system is shown;

[0061] Figure 9d According to some embodiments of the present application, a curve showing the port parameters of the filtering antenna changing with frequency is shown. Figure 1 ;

[0062] Fig.10a According to some embodiments of the present application, a partial cross-sectional view of a filtering antenna is shown. Figure 2 ;

[0063] Fig.10b According to some embodiments of the present application, a partial cross-sectional view six of a filtering antenna debugging system is shown;

[0064] Fig.10c According to some embodiments of the present application, a partial cross-sectional view seven of a filtering antenna debugging system is shown;

[0065] Fig.11a According to some embodiments of the present application, a topological structure of a filtering antenna is shown. Figure 5 ;

[0066] Fig.11bAccording to some embodiments of the present application, a perspective view of a wave antenna debugging system is shown in Figure 6;

[0067] Fig.11c According to some embodiments of the present application, a partial cross-sectional view eight of a filtering antenna debugging system is shown;

[0068] Fig.11d According to some embodiments of the present application, a curve showing the port parameters of the filtering antenna changing with frequency is shown. Figure 2 ;

[0069] Fig.12a According to some embodiments of the present application, a schematic diagram of a debugging tool for debugging a filter antenna is shown. Figure 1 ;

[0070] Figure 12b According to some embodiments of the present application, a schematic diagram of a debugging tool for debugging a filter antenna is shown. Figure 2 . DETAILED DESCRIPTION

[0071] The embodiments of the present application provide a filtering antenna, a filtering antenna debugging system, and a debugging tool. A coupling port is introduced at the antenna radiation part of the filtering antenna or the resonator connected to the antenna, and the coupling port couples a signal from the antenna or the resonator as the second port information of the filtering antenna to guide the debugging of the resonant frequency and coupling of the resonator part and the antenna part of the filtering antenna.

[0072] To facilitate understanding of the technical solution of the present application, some concepts or terms involved in the present application are first explained.

[0073] (1) Filter

[0074] A frequency selective device that passes signals within its operating frequency band and attenuates signals outside of it.

[0075] (2) Antenna

[0076] An electromagnetic radiating unit used to transmit or receive radio waves.

[0077] (3) Frequency response

[0078] The S-parameter response in the frequency domain includes the magnitude and phase responses of the reflection coefficient S11 and the transmission coefficient S21.

[0079] (4) Transmission zero (TZ)

[0080] The transmission zero point is the notch point of the transmission coefficient S21 of the S parameter, which refers to the zero point that appears in the transmission function of the filter. The transmission zero point can change the frequency response of the filter and make it have better filtering characteristics.

[0081] (5) Coupling coefficient

[0082] The strength of the coupling between resonators, between excitation and resonator, and between load and resonator.

[0083] (6) Substrate-integrated waveguide (SIW)

[0084] A form of microwave transmission line that uses metal through holes to implement the field propagation mode of the waveguide on a dielectric substrate.

[0085] (7) External quality factor (Q ext )

[0086] Defined as the ratio of the energy stored in the resonator to the energy absorbed by the load.

[0087] (8) Time domain

[0088] The independent variable is time, that is, the horizontal axis is time and the vertical axis is the change of the signal. Its dynamic signal is a function that describes the value of the signal at different times.

[0089] The specific implementation of the present application will be described in detail below with reference to the accompanying drawings.

[0090] In a wireless communication system, a filter antenna combines a filter and an antenna to achieve both filtering and radiation functions. The filter antenna is used in the RF front end of a wireless communication base station and is located after the power amplifier. During the production process of the filter antenna, the filter or antenna needs to be debugged so that the filter antenna can effectively radiate signals within the working bandwidth and filter out interference signals outside the working bandwidth. Exemplarily, the debugging process of the filter includes: polishing the hole wall of the resonant blind hole on the resonator to change the aperture of the resonant blind hole, or adjusting the depth of the coupling blind hole, etc.

[0091] See also Figure 1 , Figure 1 A schematic diagram of the structure of a wireless communication base station is shown. Figure 1 As shown, the wireless communication base station 10 includes a power amplifier 11 and a filtering antenna 12 .

[0092] The power amplifier 11 is mainly used to amplify the received signal. The filtering antenna 12 includes a filter and an antenna. Figure 1 As shown, the power amplifier 11 first amplifies the received signal, and then filters the amplified signal through the filtering antenna 11 and then transmits it.

[0093] In some embodiments, reference Figure 2 , Figure 2 Shows a topology of a filtering antenna Figure 1 .

[0094] like Figure 2 As shown, the filtering antenna 12 includes a filter 121 and an antenna 122. The filter 121 includes a first resonator 121a, a second resonator 121b, and a third resonator 121c. Exemplarily, the first resonator 121a, the second resonator 121b, and the third resonator 121c are coupled and connected in sequence through coupling components (such as coupling windows or coupling blind holes). The antenna 122 is coupled and connected to the third resonator 121c, and the first resonator 121a is connected to the feeding port 123.

[0095] It should be noted that the embodiment of the present application does not limit the number of resonators included in the filter 121. In other embodiments, the filter 121 may include more resonators or fewer resonators, for example, the number of resonators includes two, four, or six.

[0096] Reference Figure 2 In the filter antenna 12, the antenna 122 serves as a load on the filter 121, resulting in the filter antenna 12 having only one feed port 123 and no output port. When debugging the filter antenna 12, it is not possible to extract the coupling matrix using the two-port information obtained from the feed port and the output port to guide the design and debugging of the filter antenna 12, as in debugging an ordinary filter.

[0097] In order to debug the filter antenna, in some embodiments, the debugging of the filter antenna is generally to obtain a coupling matrix of a two-port network through a traditional filter synthesis method, and then replace the load of the output port of the filter with the antenna, so that the coupling between the filter and the output port is the same as the coupling between the antenna and free space (for example, air), that is, the external quality factor (Q ext )constant.

[0098] However, in order to obtain the coupling Q between the antenna and the filter ext , a separate antenna model needs to be established to perform multiple parameter sweeps (for example, multiple adjustments to the antenna position and antenna size, etc., until the target Q is achieved). extThe antenna model building and parameter scanning process are time-consuming, and after the filter antenna is designed through parameter scanning, a time domain (TD) debugging technology needs to be used to debug the filter antenna. However, the time domain debugging technology is only applicable to debugging without transmission zero (TZ). The absence of transmission zero means that the out-of-band suppression level is poor, and it will be difficult to debug with transmission zero.

[0099] In other embodiments, the signal of the feed port of the filter antenna can be used to tune the filter antenna during the simulation design stage. However, after the filter antenna based on the substrate-integrated waveguide (SIW) process is processed, if there is a processing error that causes the filter antenna to be detuned, then the filter antenna cannot be debugged.

[0100] To solve the above problems, the embodiments of the present application provide a filtering antenna, a filtering antenna debugging system, and a debugging tool. A coupling port is introduced at the antenna part of the filtering antenna or the resonator coupled to the antenna. The coupling port couples a signal from the antenna or the resonator connected to the antenna as the second port information of the filtering antenna, and this second port information and the feeding port information of the filtering antenna together constitute an equivalent two-port network. The coupling matrix of the filtering antenna is extracted through the two-port network, thereby guiding the debugging of the resonant frequency and coupling of the resonator part and the antenna part of the filtering antenna.

[0101] refer to Figure 3a , Figure 3a According to some embodiments of the present application, a topological structure of a filtering antenna is shown. Figure 2 .

[0102] like Figure 3a As shown, the filtering antenna 30 includes a filter 31, an antenna 32 and a feeding port 33. The filter 31 includes a first resonator 311a, a second resonator 311b and a third resonator 311c. Figure 2 The difference of the filter antenna 12 shown is that Figure 3a The filtering antenna 30 shown is provided with a coupling port 34 , which is coupled to the antenna 32 . The coupling port 34 is used to couple out a signal from the antenna 32 and use the signal as second port information.

[0103] In some other embodiments, the coupling port 34 may also be coupled to the resonator of the filter 31. For example, Figure 3b FIG3 shows a topological structure of a filtering antenna according to some embodiments of the present application.

[0104] like Figure 3bAs shown, the filtering antenna 30 includes a filter 31, an antenna 32, a feeding port 33 and a coupling port 34. The filter 31 includes a first resonator 311a, a second resonator 311b and a third resonator 311c, and the third resonator 311 is coupled to the antenna 32. Figure 3a The filter antenna 30 shown differs in that Figure 3b The coupling port 34 of the filtering antenna 30 is shown to be coupled to the third resonator 311 c .

[0105] Reference Figure 3b In the filtering antenna 30, the coupling port 34 is coupled to the third resonator 311c, and is used to couple out the signal of the third resonator 311c and use the signal as the second port information.

[0106] In summary, the embodiment of the present application couples a signal from the antenna 32 or the resonator 311c connected to the antenna 32 through the coupling port 34 as the second port information of the filtering antenna 30, and the second port information and the information of the feeding port 33 of the filtering antenna 30 together form an equivalent two-port network. The coupling matrix of the filtering antenna 30 is extracted through the two-port network, thereby guiding the debugging of the resonant frequency and coupling of the resonator part of the filtering antenna 30 and the antenna 32 part.

[0107] It is understandable that the above Figure 3a and Figure 3b The filtering antenna 30 in the embodiment may also include fewer resonators or more resonators, for example, two, four or six resonators. The embodiment of the present application does not impose any limitation on the number of resonators of the filtering antenna 30 .

[0108] The specific structure of the filtering antenna structure in the embodiment of the present application is described in detail below with reference to the accompanying drawings.

[0109] In the embodiments of the present application, the coupling port may be arranged in the following ways: 1) arranged at the antenna part of the filtering antenna; 2) arranged at the resonator part of the filtering antenna, the resonator being coupled to the antenna; 3) arranged at the debugging tooling for debugging the filtering antenna.

[0110] The coupling port is located at the antenna part of the filtering antenna:

[0111] The embodiment of the present application first introduces the structure of a filtering antenna in which a coupling port is coupled to an antenna.

[0112] Reference Figure 4a and Figure 4b , Figure 4a According to some embodiments of the present application, a three-dimensional filtering antenna is shown. Figure 1 , Figure 4b Shown is a partial cross-section of the filter antenna Figure 1 , Figure 4b The antenna is shown coupled to the coupling port.

[0113] like Figure 4a As shown, the filtering antenna 40 includes an antenna 41, a resonator 42 and a coupling component 43. The resonator 42 includes a resonator 421, and a conductive layer is covered on the resonator 421. Exemplarily, the resonator 421 is a rectangular block structure. The height direction ( Figure 4a The upper surface 4211 of the resonator 42 (shown in the Y direction) is provided with a coupling blind hole 4212. The dielectric and the conductor boundary (such as the coupling component 43) around the coupling blind hole 4212 can form a resonator 42. The resonator 42 is connected in the length direction ( Figure 4a The coupling component 43 is coupled to the antenna 41 (shown in the X direction). Along the length direction, one end of the coupling component 43 is connected to the side 4213 of the resonator 421, and the other end is connected to the side 414 of the antenna 41. The side 4213 of the resonator 421 and the side 414 of the antenna 41 are opposite to each other and spaced apart along the length direction. The antenna 41 of the filtering antenna 40 can be filled with a ceramic dielectric, for example, and the surface of the radiating portion of the antenna 41 is a first metallized surface 411.

[0114] Exemplarily, in this embodiment, the upper surface 4211 of the resonator 421 is perpendicular to the side 4213 of the resonator 421. The first metallized surface 411 of the antenna 41 is perpendicular to the side 414 of the antenna 41. And the upper surface 4211 of the resonator 421, the first metallized surface 411 of the antenna 41, and the upper surface of the coupling component 43 are in the same plane.

[0115] Exemplarily, the antenna 41 is a rectangular block structure. In other embodiments, the resonator 42 and the antenna 41 may also be an integrated structure, or may be combined together in a splicing manner.

[0116] It should be noted that the embodiment of the present application does not limit the shapes of the resonator 421 and the antenna 41. In other embodiments, the resonator 421 and the antenna 41 may be in other shapes, such as a cube, a cylinder, and the like.

[0117] like Figure 4b As shown, the filtering antenna 40 further includes a coupling port 412 and a second metallized surface 413. The second metallized surface 413 and the first metallized surface 411 are connected along the height direction of the antenna 41 ( Figure 4b That is, along the height direction, the second metallized surface 413 and the first metallized surface 411 are located on opposite sides of the antenna 41. It can also be understood that the first metallized surface 411 is the upper surface of the antenna 41, and the second metallized surface 413 is the lower surface of the antenna 41.

[0118] The coupling port 412 is a first slot opened on the second metallized surface 413. Figure 4b Only half of the structure of the first gap is shown. In fact, the first gap is roughly annular (such as Figure 4c shown), i.e. also including Figure 4b The signal at the antenna 41 can be coupled out through the first slot (coupling port 412). Exemplarily, Figure 4b The position of the annular gap shown is opened at the center of the second metallized surface 413 .

[0119] The embodiment of the present application does not impose any limitation on the shape and position of the coupling port 412. For example, in other embodiments, the coupling port 412 may be provided at other positions of the second metallized surface 413 (e.g., at a position deviating from the center of the second metallized surface 413), or the coupling port 412 may be a strip-shaped gap (e.g., Figure 4d shown).

[0120] refer to Figure 5 , Figure 5 The structure diagram of a debugging tool is shown. The debugging tool is applied to the above-mentioned filtering antenna 40.

[0121] like Figure 5 As shown, the debugging tool 50 includes a debugging floor 51 and a connector 52. In the embodiment of the present application, the debugging floor 51 is metallized, and the thickness direction of the debugging floor 51 ( Figure 5 The Y direction in FIG. 5 includes a lower surface 512 and an upper surface 513. Figure 5 As shown, the connector 52 is disposed on the lower surface 512 of the debugging floor 51. Figure 4a to Figure 4b The filter antenna 40 shown is placed on the upper surface 513 of the debugging floor 51 (see the following description). Figure 6a ). Exemplarily, the connector 52 is fixedly connected to the debugging floor 51, for example, the connector 52 is welded to the debugging floor 51. However, the embodiment of the present application does not limit the connection form between the connector 52 and the debugging floor 51, for example, the connector 52 can also be fixed to the debugging floor 51 by bolts.

[0122] The debugging tool 50 is provided with a connector 52, which is a coaxial connector, and is composed of a metal inner core, a filling insulating material and a metal outer wall. The connector 52 can be coupled to the coupling port 412 in the above embodiment. Figure 5 A third gap 511 is provided on the debugging floor 51. Figure 5 Only half of the structure of the third slit 511 is shown. In fact, the third slit 511 is roughly annular (similar to Figure 4c The shape of the first circular gap is the same as shown), that is, it also includes Figure 5The third gap 511 penetrates the debugging floor 51 and is connected to the Figure 4b The coupling port 412 shown matches. Exemplarily, matching means that the coupling port 412 and the third slot 511 have the same shape and are equal in size. Exemplarily, the projections of the coupling port 412 and the third slot 511 in the height direction overlap.

[0123] As mentioned above, the coupling port 412 can be in other shapes, such as a strip shape. Correspondingly, the shape of the third slot 511 on the debugging floor 51 can also be in a strip shape or other shapes, and the shape of the third slot 511 is not limited in any way. The connector 52 is coupled to the third slot 511, so that the signal can be input into the connector 52 through the third slot 511.

[0124] Continue to refer Figure 5 In the embodiment of the present application, the connector 52 is also provided with a coaxial probe 521, which passes through the debugging floor 51 in the height direction. The coaxial probe 521 can guide the signal of the antenna 41 part to the third slot 511, so that the connector 52 obtains the coupling signal. In other embodiments, the coaxial probe 521 may not be provided on the connector 52.

[0125] It can be understood that the coupling port 412 (first slot) coincides with the projection of the third slot 511 in the height direction, so the signal of the antenna 41 portion can be transmitted through the first slot and the third slot 511 to the connector 52 coupled to the third slot 511, so that the connector 52 obtains the signal of the antenna 41 portion.

[0126] According to the following Figure 4a , Figure 4b and Figure 5 A filter antenna debugging system is introduced.

[0127] Reference Figure 6a and Figure 6b , Figure 6a According to some embodiments of the present application, a stereoscopic diagram of a filtering antenna debugging system is shown. Figure 6b A partial cross-sectional view of a filtering antenna debugging system is shown according to some embodiments of the present application.

[0128] like Figure 6a and Figure 6b As shown, the filtering antenna debugging system includes a filtering antenna 40 ( Figure 4a to Figure 4b) and the debugging tool 50. The filtering antenna 40 is placed on the upper surface 513 of the debugging floor 51, the coaxial probe 521 on the connector 52 is inserted into the antenna 41, and the coupling port 412 on the antenna 41 of the filtering antenna 40 is opposite to the third slot 511 on the debugging floor 51, for example, the projection in the height direction overlaps. Since the coupling port 412 (first slot) overlaps with the third slot 511 in the height direction, the signal of the antenna 41 can be transmitted to the connector 52 through the first slot and the third slot 511. As a result, the connector 52 couples out the signal of the antenna 41 part as the second port signal through the third slot 511 and the coupling port 412 (first slot).

[0129] It can be understood that the debugging personnel can use the signal coupled out of the connector 52 from the coupling port 412 as the second port signal, and the second port signal and the first port signal of the feeding port of the filtering antenna 40 together form a two-port network. The coupling matrix of the filtering antenna 40 is extracted through the two-port network, so as to guide the debugging personnel to debug the filtering antenna 40 according to the coupling matrix.

[0130] As mentioned above, the first slot as the coupling port 412 may also be a strip-shaped slot, and the third slot 511 on the debugging floor 51 is also a strip-shaped slot corresponding to the first slot. Figure 7a and Figure 7b , Figure 7a According to some embodiments of the present application, a three-dimensional diagram of a debugging system for a filtering antenna is shown. Figure 2 , Figure 7b Show Figure 7a A half-section view of the antenna 41 part, Figure 7a The first slot as the coupling port 412 is a strip slot. Figure 7b It is shown that the third gap 511 on the debugging floor 51 is also a strip-shaped gap.

[0131] like Figure 7a and Figure 7b As shown, the filter antenna debugging system includes a filter antenna 40 and a debugging tool 50. Figure 6a The debugging tool 50 shown is also different in that: Figure 7a The second port signal is coupled out from the coupling port 412 through the microstrip line 522. The microstrip line 522 is connected to the connector ( Figure 7a After the microstrip line 522 couples out the second port signal, the second port signal is then transmitted to the connector 52.

[0132] like Figure 7b As shown, the coupling port 412 opened on the second metallized surface 413 of the antenna 41 is a strip-shaped slot ( Figure 7bOnly half of the strip-shaped gap is shown in FIG. 1 ), and the third gap 511 opened on the debugging floor 51 is also a strip-shaped gap ( Figure 7b Only half of the strip-shaped gap is shown in FIG. 4 ). The coupling port 412 is opposite to the third gap 511. For example, the coupling port 412 and the third gap 511 are arranged along the height direction ( Figure 7b The projection of the microstrip line 522 ( Figure 7b The microstrip line 522 (only half of which is shown in the figure) is arranged on the lower surface 512 of the debugging floor 51, and the third slot 511 exposes the microstrip line 522. In this way, the microstrip line 522 can couple the signal of the antenna 41 through the third slot 511 and the coupling port 412.

[0133] Exemplarily, in this embodiment, the microstrip line 522 is arranged along the length direction ( Figure 7b In other embodiments, the microstrip line 522 may also extend in other directions, for example, in a direction perpendicular to the length direction.

[0134] It should be noted that the embodiment of the present application does not limit the position of the microstrip line 522. In other embodiments, the microstrip line 522 may also be arranged at other positions, such as inside the debugging floor 51.

[0135] In some other embodiments, the coupling port 412 may also be a metal strip. The following describes a scenario where the coupling port 412 is a metal strip.

[0136] Reference Figure 8a , Figure 8a A three-dimensional diagram of a filtering antenna debugging system is shown according to some embodiments of the present application.

[0137] like Figure 8a As shown, the debugging system includes a filtering antenna 40 and a debugging tool 50. Figure 6a The difference between the filter antenna 40 and the debugging tool 50 shown is that Figure 8a The coupling port 412 coupled to the antenna 41 is a metal strip. In this embodiment, the metal strip is coupled to the side 415 of the antenna 41, and the metal strip can couple the signal of the antenna 41 from the side 415 of the antenna 41. Accordingly, the upper surface 513 of the debugging tool 50 is provided with a microstrip line 522 connected to the metal strip, and the microstrip line 522 is connected to the connector ( Figure 8a (not shown) connection.

[0138] It should be noted that in other embodiments, the metal strip may also be coupled to other sides perpendicular to the first metallized surface 411 of the antenna 41, for example, the side 414 of the antenna 41. The present application does not limit the side where the metal strip is coupled to the antenna 41.

[0139] For example, refer to Figure 8a A coupling port 412 (metal strip) is coupled to the side 415 of the antenna 41 opposite to the side 414, and the side 415 of the antenna 41 is a non-metalized surface. The microstrip line 522 on the debugging tool 50 is set on the upper surface 513 of the debugging floor 51, and the upper surface 513 is a non-metalized surface.

[0140] The metal strip contacts the microstrip line 522, and the microstrip line 522 transmits the signal of the metal strip portion to the connector ( Figure 8a (not shown) to obtain the signal of the antenna 41 part.

[0141] It should be noted that in the embodiment of the present application, the metal strip extends in the height direction and is perpendicular to the debugging floor 51 (or perpendicular to the X direction). The metal strip is L-shaped after being connected to the microstrip line 522. In other embodiments, the metal strip may also extend in other directions, for example, along the diagonal direction of the side 415 of the antenna 41. This embodiment does not limit the extension direction of the metal strip and the microstrip line 522.

[0142] Figure 8b According to some embodiments of the present application, a stereoscopic diagram of a filtering antenna debugging system is shown in Figure 4.

[0143] like Figure 8b As shown, in the debugging system, the metal strip is arranged on the side of the antenna 41 opposite to the first metallized surface 411, that is, the bottom surface 416 of the antenna 41, and the bottom surface 416 is a non-metallized surface. The metal strip extends to the edge of the bottom surface 416 along the length direction. The upper surface 513 of the debugging floor 51 is also a non-metallized surface, and the microstrip line 522 is arranged on the upper surface 513 of the debugging floor 51. The microstrip line 522 is connected to the metal strip and forms a straight line along the length direction, that is, the angle between the microstrip line 522 and the metal strip is 180°.

[0144] It should be noted that in other embodiments, the microstrip line 522 and the metal strip may be connected at any angle, such as 90°. The microstrip line 522 and the metal strip may also extend in other directions, such as in a direction perpendicular to the length direction. This embodiment does not limit the direction in which the microstrip line and the metal strip extend and the angle of connection.

[0145] When debugging the filter antenna 40, the metal strip contacts the microstrip line 522. After the metal strip couples the signal of the antenna 41 from the bottom surface of the antenna 41, it transmits the signal to the connector 52 through the microstrip line 522 ( Figure 8b (not shown) to obtain the signal of antenna 41.

[0146] The above embodiment introduces the structure of the antenna 41 in the filtering antenna 40 and the resonator 42 coupled to the antenna 41. In other embodiments, the filtering antenna 40 includes a plurality of resonators 42.

[0147] Figures 4a to 8b The filtering antenna shown includes a resonator. Figures 9a to 9d , Figure 9a According to some embodiments of the present application, a topological structure of a filtering antenna is shown in FIG4 . Figures 9a to 9d A plurality of resonators are shown in FIG. Figures 9a to 9d In the illustrated embodiment, the coupling port is a slot and is coupled to the antenna.

[0148] like Figure 9a As shown, the overall order of the filtering antenna 90 is 7th order, including a 6th order filter 91 and a 1st order antenna 92. Among them, the filter 91 includes a first resonator 912a, a second resonator 912b, a third resonator 912c, a fourth resonator 912d, a fifth resonator 912e and a sixth resonator 912f. The first resonator 912a to the fourth resonator 912d are a cascaded quadruplet (CQ), which can generate two transmission zeros. The first resonator 912a is connected to a feeding port 911, the antenna 92 ​​is coupled to the sixth resonator 912f, and the antenna 92 ​​is partially coupled with a coupling port 921.

[0149] The following describes the debugging scenario of the above-mentioned filter antenna 90.

[0150] Figure 9b According to an embodiment of the present application, a stereoscopic diagram of a wave antenna debugging system is shown. Figure 5 .

[0151] like Figure 9bAs shown, the debugging system includes a first filter 91, a second filter 91', an antenna 92 ​​and a debugging floor 94. Among them, the antenna 92 ​​can be, for example, a dual-polarization patch antenna. The first filter 91 includes six resonators, namely a first resonator 912a, a second resonator 912b, a third resonator 912c, a fourth resonator 912d, a fifth resonator 912e and a sixth resonator 912f. Among them, the first resonator 912a, the second resonator 912b, the third resonator 912c and the fourth resonator 912d can form a coupled topological structure. For example, in one embodiment, the coupled topological structure can be specifically a cascade quadruplet (CQ) topological structure. It should be noted that the CQ topological structure is formed by cascading four resonators 912 as a unit, and the unit can independently realize two transmission zeros, thereby improving the out-of-band suppression capability. The fifth resonator 912e is connected to the CQ topology structure, the sixth resonator 912f is connected to the fifth resonator 912e, and through the coupling component ( Figure 9a The first resonator 912a is connected to the antenna 92, and the first resonator 912a is also connected to the feeding port 911. In this embodiment, the coupling component can be a waveguide, and the surface is a non-metallic surface.

[0152] In the above embodiment, the first resonator 912a, the second resonator 912b, the third resonator 912c, the fourth resonator 912d, the fifth resonator 912e and the sixth resonator 912f may be an integrated structure, so that the above six resonators may be manufactured by an integrated molding process, thereby simplifying the manufacturing steps of the filtering antenna 90. In addition, in order to reduce the manufacturing cost, the first resonator 912a, the second resonator 912b, the third resonator 912c, the fourth resonator 912d, the fifth resonator 912e and the sixth resonator 912f may be made of the same material, for example, the six resonators may all be ceramic resonators.

[0153] In the above resonators, in order to achieve coupling of the resonators in the CQ topology structure, a coupling blind hole 913 may be provided between the second resonator 912b and the third resonator 912c, and the second resonator 912b and the third resonator 912c are capacitively coupled through the coupling blind hole 913. A coupling blind slot 914 may be provided between the second resonator 912b and the fourth resonator 912d, and the second resonator 912b and the fourth resonator 912d are magnetically coupled through the coupling blind slot 914.

[0154] The second filter 91' has the same parameter specifications as the first filter 91, and also includes six resonators 912', namely, a first resonator 912a', a second resonator 912b', a third resonator 912c', a fourth resonator 912d', a fifth resonator 912e' and a sixth resonator 912f'. Among them, the first resonator 912a', the second resonator 912b', the third resonator 912c' and the fourth resonator 912d' can form a coupled topological structure. The first resonator 912a' is connected to the feeding port 911', and the resonator 912f' is connected to the feeding port 911' through the coupling component ( Figure 9b The second resonator 912b' is capacitively coupled to the third resonator 912c' via a blind coupling hole 913', and the second resonator 912b' is magnetically coupled to the fourth resonator 912d' via a blind coupling slot 914'.

[0155] In addition, according to different application scenarios, the filtering antenna 90 can be configured as different types of antennas. Figure 9b As shown, in a specific embodiment, the antenna 92 ​​can be set as a 45-degree line antenna 92. In the embodiment of the present application, one polarization direction N of the antenna 92 ​​is set at 45 degrees to the extension direction M of the long side of the resonator in the first filter 91. Another polarization direction N' is set at 45 degrees to the extension direction M' of the side length of the resonator in the second filter 91', and the two polarization directions of the antenna 92 ​​are set at 90 degrees.

[0156] Reference Figure 9b and Fig.9c , Fig.9c According to an embodiment of the present application, a partial cross-sectional view 3 of a filtering antenna debugging system is shown. Figure 6a The difference between the filter plate antenna debugging system shown is that Figure 9b and Fig.9c The filter antenna 90 in the debugging system shown in FIG. 1 includes two filters of the same specification, namely a first filter 91 and a second filter 91', and each filter includes six resonators. In addition, the first filter 91 also includes a feeding port 911, and the second filter 91' also includes a feeding port 911'.

[0157] Exemplarily, in the debugging system, the coupling port 921 is an annular gap provided on the bottom surface of the antenna 92. A third gap 941 matching the coupling port 921 is also provided on the debugging floor 94. The third gap 941 is opposite to the coupling port 921, that is, the projections in the height direction overlap. The connector 95 and the antenna 92 ​​are arranged on both sides of the debugging floor 94. The connector 95 is opposite to the third gap 941 (that is, the projections in the height direction overlap), so that the connector 95 can couple the signal of the antenna 92 ​​from the third gap 941. A coaxial probe 951 is also provided on the connector 95. In the height direction, the coaxial probe 951 is inserted into the antenna 92. The coaxial probe 951 can guide the signal of part of the antenna 92 ​​to the third gap 941, so that the connector 95 couples the coupling signal. It should be noted that in some other embodiments, the coupling probe may not be provided on the connector 95.

[0158] Exemplarily, when debugging the first filter 91, the first port information can be obtained according to the feeding port 911 of the filter 91. The signal of the antenna 92 ​​coupled from the coupling port 921 by the connector 95 is used as the second port information. The first port information and the second port information form a dual-port network coupling matrix, thereby guiding the debugging of the first filter 91. When debugging the second filter 91', the first port information and the second port information of the signal of the antenna 92 ​​coupled from the coupling port 921 by the connector 95 can be obtained according to the feeding port 911' of the second filter 91'. The coupling matrix of the dual-port network formed based on the dual-port information of the second filter 91' guides the debugging of the filter 91'.

[0159] Reference Figure 9d , Figure 9d According to an embodiment of the present application, a curve showing the port parameters of the filtering antenna changing with frequency is shown. Figure 1 .

[0160] like Figure 9dAs shown, the debugging results of the filter antenna 90 through the above-mentioned dual-port network signal are as follows: Among them, S(1,1) is the curve of the reflection loss of the feed port 911 of the filter antenna 90 changing with the frequency. In the frequency range of 3.5-3.75GHz, the reflection loss of the filter antenna 90 is small, about -20db, and the signal transmission efficiency of the filter antenna 90 is relatively high. S(2,1) is the curve of the isolation between the filter antenna 90 and the filter antenna 90' changing with the frequency. S(3,1) is the curve of the output signal of the coupling port 921 of the filter antenna 90 changing with the frequency. It can be understood that the filter antenna 90 can generate an out-of-band zero point fz1 and fz2 on the left and right sides of the passband, respectively, to improve the out-of-band suppression capability of the filter antenna 90. S(2,2) is the curve of the reflection loss of the feed port 911' of the filter antenna 90' changing with the frequency. Similarly, in the frequency range of 3.5-3.75GHz, the reflection loss of the filter antenna 90' is small, also about -20db.

[0161] It can be understood that in this embodiment, the target operating frequency of the filter antenna 90 and the filter antenna 90' is about 3.5GHz to 3.75GHz, and the target reflection loss is within -20db. For example, when debugging the filter antenna 90, the image of the above parameters changing with frequency can be obtained through the dual-port information composed of S(1,1) and S(3,1), and the filter antenna 90 can be debugged by polishing the coupling blind hole of the resonator 912 on the filter 91, so that the filter antenna 90 can meet the target requirements (that is, the above target reflection loss is -20db) according to the signals of the feeding port 911 and the coupling port 921. However, when there is only one feeding port 911 and no coupling port 911, it is impossible to obtain the image of the above parameters changing with frequency, and it is also impossible to guide the debugging of the filter 90 according to the image.

[0162] In other embodiments, the target return loss may also be other values, such as -10db, -15db. Similarly, the operating frequency band may also be in other ranges, such as 4.0GHz to 4.5GHz.

[0163] The following describes a scheme in which the coupling port is located at the resonator portion of the filtering antenna:

[0164] Reference Figure 10a to Figure 10b , Fig.10a According to an embodiment of the present application, a partial cross-sectional view of a filtering antenna is shown. Figure 2 .

[0165] like Fig.10a As shown, the filtering antenna includes an antenna 41, a resonator 42, a coupling component 43 and a coupling port 412. Figure 4b The difference between the filter antenna shown is that Fig.10aThe coupling port 412 is shown to be disposed on the resonator 42. For example, the resonator 42 has a resonant body 421 along the height direction (i.e. Fig.10a A second slit is provided on the lower surface 4214 (in the Y direction) opposite to the upper surface 4211, and the second slit serves as a coupling port 412 arranged on the resonator 42.

[0166] Fig.10b A partial cross-sectional view six of a filtering antenna debugging system is shown according to an embodiment of the present application.

[0167] like Fig.10b As shown, the debugging system includes Fig.10a The filter antenna 40 shown and Figure 5 The debugging tool 50 shown. Figure 6b The debug system shown is different in that Fig.10b The connector 52 in the resonator 42 is coupled to the coupling port 412 on the resonator 42. For example, the third slot 511 ( Fig.10b The third slot 511 is only half shown in the figure) and is opposite to the coupling port 412 on the resonator 42 (the projection along the Y direction coincides), and the connector 52 is coupled to the coupling port 412 through the third slot 511, so that the connector 52 obtains the signal at the resonator 42 as the second port signal of the filtering antenna 40 to guide the debugging of the filtering antenna 40. It should be understood that the coupling port 412 coincides with the third slot 511 in the height direction. The signal of the resonator 42 part can be transmitted to the third slot 511 through the second slot (i.e., the coupling port 412), so that the connector 52 obtains the corresponding coupling signal.

[0168] Fig.10c A partial cross-sectional view seven of a filtering antenna debugging system is shown according to an embodiment of the present application.

[0169] like Fig.10c As shown, the scene includes Fig.10a The filtering antenna 40 and the debugging tool 50 in the embodiment are Fig.10b The scene is different in that Fig.10c In the scenario, the coupling port 412 of the lower surface 4214 of the resonator 421 is a strip-shaped gap. Figure 7b The debugging tooling 50 shown in the scene is the same. The coupling end 412 overlaps in height with the third slit 511 on the upper surface 513 of the debugging floor 51 . A microstrip line 522 is disposed on the lower surface 512 of the debugging floor 51 , and the third slit 511 exposes the microstrip line 522 .

[0170] For example, in this embodiment, the connector ( Fig.10cThe microstrip line 522 (not shown) is connected to the microstrip line 522, and the signal at the resonator 42 coupled from the coupling port 412 is transmitted to the connector.

[0171] In some other embodiments, the coupling port 412 on the resonator 42 may also be disposed on a side wall of the resonator 42 , such as a surface of the resonator 421 parallel to the height direction (such as a side surface 4213 of the resonator 421 ).

[0172] It should be noted that, in other embodiments, the coupling port 412 on the resonator 42 may also be a metal strip disposed on the side wall of the resonator 42, and the metal strip disposed on the resonator 42 is partially non-metallized so that the metal strip couples out the signal at the resonator 42. The debugging tool 50 is provided with a microstrip line 522 connected to the metal strip, and the connector 52 is connected to the microstrip line 522. The microstrip line 522 transmits the signal of the resonator 42 coupled out by the metal strip to the connector 52, so as to obtain the second port signal of the filtering antenna 40.

[0173] Figure 10a to Figure 10b The filtering antenna shown includes a resonator. Figure 11a to Figure 11b , Fig.11a According to some embodiments of the present application, a topological structure of a filtering antenna 90 is shown. Figure 5 , Figure 11a to Figure 11b In the embodiment, the coupling port is a slot and is coupled to the resonator.

[0174] like Fig.11a As shown, the overall order of the filtering antenna 90 is 7th order, including a 6th order filter 91 and a 1st order antenna 92. The filter 91 includes a first resonator 912a, a second resonator 912b, a third resonator 912c, a fourth resonator 912d, a fifth resonator 912e and a sixth resonator 912f. Figure 9a The topology of the filter antenna 90 shown differs in that Fig.11a In the embodiment, the sixth resonator 912f is coupled to the coupling port 915.

[0175] The following describes the scenario of debugging the above filtering antenna.

[0176] Reference Fig.11b and Fig.11c . Fig.11b According to an embodiment of the present application, a stereoscopic diagram of a debugging system for debugging a filtering antenna is shown. Fig.11c A partial cross-sectional view 8 of a debugging system for debugging a filtering antenna is shown according to an embodiment of the present application.

[0177] like Fig.11b As shown, Figure 9bThe debug system shown is different in that Fig.11b The debugging system shown is provided with a first coupling port 915 and a first connector 95 at the sixth resonator 912f of the first filter 91, a second coupling port 915' and a second connector 95' at the sixth resonator 912f' of the second filter 91', and no coupling port is provided at the antenna 92. Fig.11c The first coupling port 915 is a second slot opened on the debugging floor 94. The debugging floor 94 is provided with a third slot 941. The third slot 941 overlaps with the first coupling port 915 (second slot) in the height direction. The signal at the sixth resonator 912f can be transmitted from the first coupling port 915 and the third slot 941 to the connector 95. Fig.11c ,and Fig.9c The connectors 95 shown differ in that the first connector 95 is not provided with a coaxial probe.

[0178] Exemplarily, the first filter 91 can be debugged according to the two-port network coupling matrix composed of the input signal of the feeding port 911 and the coupling signal at the first coupling port 915. Similarly, the second filter 91' can be debugged according to the two-port network coupling matrix composed of the input signal of the feeding port 911' and the coupling signal of the second coupling port 915'.

[0179] Reference Fig.11d , Fig.11d According to an embodiment of the present application, a curve showing the port parameters of the filtering antenna changing with frequency is shown. Figure 2 .

[0180] like Fig.11d As shown, the debugging result of the filtering antenna 90 through the above-mentioned dual-port network signal is the same as Figure 9d The difference is that S(3, 1) is a curve showing the output signal of the first coupling port 915 at the sixth resonator 912f changing with frequency ( Fig.11d The curve of the output signal of the second coupling port 915' varying with frequency is not drawn in FIG.

[0181] The following describes the scheme of setting the coupling port on the debugging tooling:

[0182] Reference Fig.12a FIG. 12 shows a schematic diagram of a debugging tool for debugging a filter antenna. Figure 1 .like Fig.12a As shown, the debugging tool is Figure 5 The debugging tool 50 in the embodiment. Figure 6a The filter antenna 40 shown in the scenario is different in that Fig.12aThe filter antenna 40 shown is not provided with a coupling port 412, and the coupling port 412 is provided on the debugging tool 50. Exemplarily, in this embodiment, the third slot 511 (which may also be referred to as the fourth slot in other embodiments) on the debugging floor 51 is the coupling port 412, and the connector 52 is fixed to the lower surface 512 of the debugging floor 51. The connector 52 is provided with a coaxial probe 521, and the coaxial probe 521 is arranged along the height direction ( Fig.12a Y direction) through the debugging floor 51.

[0183] Exemplarily, in the embodiment of the present application, when debugging the filter antenna 40, it is only necessary to place the filter antenna 40 on the upper surface 513 of the debugging floor 51, and the side wall of the antenna 41 is in contact with the coaxial probe 521, so that the coaxial probe 521 guides the signal radiated by the antenna to the coupling port 412. Only the surface of the antenna 41 that radiates the signal is a metallized surface (e.g., the first metallized surface 411), the surface of the antenna 40 that is in contact with the coaxial probe 521 is a non-metallized surface, and the surface of the antenna 41 that is in contact with the coupling port 412 is also a non-metallized surface, so that the coupling port 412 can couple the signal from the antenna 41 as the second port signal.

[0184] Figure 12b Shows a schematic diagram of a debugging tool for debugging a filter antenna Figure 2 .and Fig.12a The difference is, Figure 12b A microstrip line 522 is provided on the debugging floor 51 of the debugging tool shown in the figure. The microstrip line 522 serves as the coupling port 412. The microstrip line 522 is arranged along the length direction ( Figure 12b The microstrip line 522 is disposed on the upper surface 513 of the debugging floor 51 in the X direction, one end of the microstrip line 522 is in contact with the antenna 41, and the other end is connected to the connector ( Figure 12b At this time, the debugging floor 51 is a non-metallic structure, and the surface where the antenna 41 contacts the microstrip line 522 is also a non-metallic surface. The microstrip line 522 can couple the signal from the antenna 41 and transmit the signal to the connector 52. The connector 52 uses the signal coupled from the microstrip line 522 as the second port information, and then connects it to the feeding port ( Figure 12b The first port information obtained (not shown) constitutes a two-port network coupling matrix, thereby guiding the design and debugging of the filtering antenna 40.

[0185] exist Fig.12a and Figure 12b In the illustrated embodiment, the coupling port 412 is disposed on the debugging tool 50 , while the coupling port 412 is not disposed on the filtering antenna 40 , and the filtering antenna 40 is not provided with a component connected to the coupling port 412 , and the debugging of the corresponding filtering antenna 40 is completed through the debugging tool 50 and the connector 52 .

[0186] In summary, when debugging the filter antenna, the filter antenna or debugging tool provided by the present application can introduce a coupling port into the antenna part of the filter antenna or the resonator part coupled with the antenna, couple out the signal of the antenna part or the signal of the resonator coupled with the antenna through the coupling port, and use the signal as the second port signal to form a two-port network with the first port signal of the feeding port of the filter antenna, thereby guiding the debugging of the filter antenna through the two-port network and reducing the complexity of debugging the filter antenna. In addition, the filter antenna or debugging tool of the present application can guide the debugging of a single-port filter antenna with a transmission zero point.

Claims

1. A filtering antenna, characterized in that: including an antenna, a coupling component, a resonator and a coupling port; The resonator is coupled to the antenna through the coupling component; The antenna is coupled to the coupling port; or, The resonator is coupled to the coupling port.

2. The filtering antenna according to claim 1, characterized in that The antenna comprises a first metallized surface and a second metallized surface disposed opposite to each other, wherein the first metallized surface is a radiating surface; The coupling port is a first slot, and the first slot is opened on the second metallized surface.

3. The filtering antenna according to claim 1, characterized in that: The antenna comprises a first metallized surface and a non-metallized surface, wherein the first metallized surface is a radiation surface; the coupling port is a metal strip, and the metal strip is attached to the non-metallized surface.

4. The filtering antenna according to claim 1, characterized in that: The coupling port is a second slot, and the second slot is opened on the surface of the resonator.

5. The filtering antenna according to claim 1, characterized in that: The coupling port is a metal strip; The surface of the resonator includes a non-metallized area, and the metal strip is attached to the non-metallized area.

6. A filter antenna debugging system, characterized in that: include: A debugging tool and a filter antenna as claimed in any one of claims 1 to 5; The debugging tooling includes a debugging floor and a connector; The filtering antenna is arranged on the debugging floor; The connector is coupled to the coupling port of the filtering antenna.

7. The system according to claim 6, characterized in that When the coupling port is the first slot or the second slot, the debugging floor is provided with a third slot matching the first slot or the second slot, and the connector is coupled to the coupling port through the third slot.

8. The system according to claim 7, characterized in that The connector and the filtering antenna are located on opposite sides of the debugging floor. A coaxial probe is also provided on the connector. The coaxial probe is inserted into the antenna through the first slot, or the coaxial probe is inserted into the resonator through the second slot.

9. The system according to claim 7, characterized in that The debugging floor is provided with a microstrip line, the third gap exposes the microstrip line, and the connector is connected to the microstrip line.

10. The system according to claim 6, characterized in that When the coupling port is a metal strip, the debugging floor is provided with a microstrip line, the microstrip line is in contact with the metal strip, and the connector is connected to the microstrip line.

11. A debugging tool for a filtering antenna, the filtering antenna comprising an antenna, a coupling component, and a resonator, wherein the resonator is coupled to the antenna through the coupling component; characterized in that: The debugging tooling includes a debugging floor, a connector and a coupling port; The coupling port is used for coupling connection with the antenna, and the connector is coupled connection with the coupling port.

12. The debugging tool as claimed in claim 11, characterized in that: The debugging floor is a metal floor, and the coupling port is a fourth slit opened on the surface of the metal floor.

13. The debugging tool as claimed in claim 12, characterized in that: The connector is provided with a coaxial probe, which passes through the fourth slot to contact the non-metallized side surface of the antenna.

14. The debugging tool according to claim 11, characterized in that: The debugging floor is a non-metal floor, the coupling port is a microstrip line, and the microstrip line is arranged on the surface of the non-metal floor.

Images