A hybrid integrated millimeter wave coaxial radial triplexer

Abstract

This application relates to the field of radio frequency microwave circuit technology and discloses a hybrid integrated millimeter-wave coaxial radial triode, including a first coaxial line, a dielectric substrate, three output circuits disposed on the dielectric substrate, and a second coaxial line. The output circuit includes a coaxial probe, an arcuate stripline, and a width-change-abrupt stripline connected in sequence, with at least one slot structure disposed on the arcuate stripline. This application utilizes a concentric arcuate stripline disposed inside the first coaxial line solely for transmitting excitation signals, and employs a circuit design on the arcuate stripline that enables the implementation of a bandpass filter structure. This allows the signal excited and coupled by the coaxial probe to be transmitted via the arcuate stripline to three signals of different specific frequency bands to a standard microstrip line connected outside the first coaxial line. This effectively improves upon the problem of the difficulty and large workload in designing common port impedance matching networks in traditional circuit structures.

Description

Technical Field

[0001] This application relates to the field of radio frequency microwave circuit technology, specifically to a hybrid integrated millimeter-wave coaxial radial tripod. Background Technology

[0002] A microwave triplexer is a key passive device used in communication systems to separate or combine signals from different frequency bands. It is widely used in base stations, satellite communications, and other fields. Its core principle is based on the frequency selectivity of filters. By designing filters with different center frequencies, it enables the independent transmission of multiple signals while meeting requirements for high isolation, out-of-band rejection, low insertion loss, and low port voltage standing wave ratio.

[0003] Common circuit structures for microwave triodes include microstrip lines, rectangular waveguides, and coaxial lines. Microstrip line triodes are characterized by miniaturization and high integration, while rectangular waveguide and coaxial line triodes are suitable for high-frequency, high-power applications, offering low loss and high reliability. In practical applications, there are often examples of triode circuits designed by combining different transmission line structures, such as microstrip line triodes, waveguide-microstrip hybrid triodes, and coaxial-microstrip hybrid triodes fabricated using low-temperature co-fired ceramic technology. These types of triodes offer advantages such as enabling more compact circuit designs at higher frequency bands, such as millimeter-wave bands, and ease of integration with other circuits.

[0004] In related technologies, due to the characteristics of their circuit structure, these three-way converters do not perform pre-frequency separation in the input channels. Instead, frequency separation is usually achieved by connecting filters to the three output channels at the back end of the impedance matching network. This results in a high design difficulty and workload in the design of the impedance matching network at the common port. Summary of the Invention

[0005] This application provides a hybrid integrated millimeter-wave coaxial radial tripod to solve or improve the problem that existing tripods do not perform pre-frequency separation in the input channel, which leads to design difficulties and a large workload in the impedance matching network design of the common port.

[0006] This application provides a hybrid integrated millimeter-wave coaxial radial triode, comprising:

[0007] The first coaxial cable is used to input electromagnetic wave signals;

[0008] A dielectric substrate is connected to the bottom cross-section of the first coaxial line;

[0009] A three-way output circuit is disposed on the upper surface of the dielectric substrate. The output circuit includes a coaxial probe, an arc-shaped strip line, and a width-change strip line connected in sequence. At least one slit structure is provided on the arc-shaped strip line.

[0010] The coaxial probe, the arc-shaped band, and the width-abrupt band are all located, at least partially, inside the outer conductor metal sidewall of the first coaxial line.

[0011] In an alternative embodiment, a second coaxial line is further included, the second coaxial line being short-circuited at its terminal and connected to the lower surface of the dielectric substrate, and the cross-sectional dimensions of the second coaxial line are the same as those of the first coaxial line.

[0012] In one alternative embodiment, the three coaxial probes are arranged radially along the first coaxial line at an asymmetrical included angle.

[0013] In one alternative embodiment, the connection between the coaxial probe and the arc-shaped strip is provided with a chamfer, and the chamfer faces the outer conductor metal sidewall of the coaxial line.

[0014] In one alternative embodiment, the arc-shaped strip is located close to the outer conductor metal sidewall of the coaxial line, and the center of the arc-shaped strip is concentric with the center of the first coaxial line.

[0015] In one alternative embodiment, multiple slit structures are provided on the same arc-shaped band, and the interval dimensions of the multiple slit structures are different.

[0016] In one optional embodiment, the edge of the width abrupt change line toward the center of the first coaxial line is set as an arc segment, and the center of the arc segment is concentric with the center of the first coaxial line; the edge of the width abrupt change line away from the center of the first coaxial line is set as a straight line segment.

[0017] In one optional embodiment, the output circuit further includes an impedance matching circuit and a standard microstrip line connected in sequence, at least a portion of the impedance matching circuit and the standard microstrip line being located outside the outer metal sidewall of the coaxial line, and the impedance matching circuit being connected to the straight segment of the width-change-off strip line.

[0018] In the three output circuits, the impedance matching circuit and the circuit formed by the cascaded standard microstrip line are arranged radially along the first coaxial line with a 120° symmetrical included angle, and the standard microstrip line is a 50-ohm standard microstrip line.

[0019] In an optional embodiment, it further includes three opening slots extending from the metal sidewall of the coaxial line outer conductor, all three opening slots communicating with the interior of the metal sidewall of the coaxial line outer conductor.

[0020] The connection point between the width abrupt change line and the impedance matching circuit corresponds to the inner wall of the outer conductor metal sidewall of the coaxial line, or the connection point between the width abrupt change line and the impedance matching circuit is located within the opening slot.

[0021] In one alternative embodiment, at least one first circuit is provided on the lower surface of the dielectric substrate. The first circuit is configured in a rectangular or circular shape and is disposed corresponding to the terminal short surface of the second coaxial line.

[0022] The hybrid integrated millimeter-wave coaxial radial tripper provided in this application utilizes a concentric arc strip line inside the first coaxial line, used solely for excitation signal transmission. A bandpass filter structure is designed on this arc strip line, enabling the signal excited and coupled by the coaxial probe to be transmitted via the arc strip line to three separate signals of different specific frequency bands to a standard microstrip line connected outside the first coaxial line. This effectively improves upon the design difficulties and workload associated with common port impedance matching networks in traditional circuit structures. Furthermore, the tripper circuit implemented in this application features a compact structure. As a basic circuit scheme for trippers, bandpass filters can be flexibly and conveniently cascaded on the standard microstrip line to further enhance the tripper's performance. Simultaneously, it facilitates integration with other circuits as needed to expand circuit functionality, creating hybrid integrated circuit components with more functions. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a three-dimensional structural diagram of the three-way actuator according to an embodiment of this application;

[0025] Figure 2 for Figure 1 A schematic diagram of the decomposition process;

[0026] Figure 3 This is a schematic diagram of the circuit on the front side of the dielectric substrate in an embodiment of this application;

[0027] Figure 4 This is a schematic diagram of the circuit on the back side of the dielectric substrate according to an embodiment of this application;

[0028] Figure 5 This is a schematic diagram showing the positional relationship between the K-connector and the first coaxial line according to an embodiment of this application;

[0029] Figure 6 This is a simulation diagram of the input port return loss in an embodiment of this application;

[0030] Figure 7 This is a simulation diagram of the return loss and insertion loss of the 28.5G output port in an embodiment of this application;

[0031] Figure 8 The return loss and insertion loss of the 35G output port in this embodiment of the application are shown.

[0032] Figure 9 The return loss and insertion loss of the 39G output port in this embodiment of the application are shown.

[0033] Figure 10 The output port isolation (S) of this application embodiment 23 S 34 S 24 Simulation results diagram.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. First coaxial line; 11. Coaxial line outer conductor metal sidewall; 2. Dielectric substrate; 3. Output circuit; 31. Coaxial probe; 32. Circular arc strip line; 33. Strip line with abrupt width change; 331. Circular arc segment; 332. Straight segment; 34. Slot structure; 35. Impedance matching circuit; 36. Standard microstrip line; 4. Second coaxial line; 5. Chamfer; 6. Open slot; 7. First circuit; 8. K-connector. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] A microwave triplexer is a key passive device used in communication systems to separate or combine signals from different frequency bands. It is widely used in base stations, satellite communications, and other fields. Its core principle is based on the frequency selectivity of filters. By designing filters with different center frequencies, it enables the independent transmission of multiple signals while meeting requirements for high isolation, out-of-band rejection, low insertion loss, and low port voltage standing wave ratio.

[0038] Common circuit structures for microwave triodes include microstrip lines, rectangular waveguides, and coaxial lines. Microstrip line triodes are characterized by miniaturization and high integration, while rectangular waveguide and coaxial line triodes are suitable for high-frequency, high-power applications, offering low loss and high reliability. In practical applications, there are often examples of triode circuits designed by combining different transmission line structures, such as microstrip line triodes, waveguide-microstrip hybrid triodes, and coaxial-microstrip hybrid triodes fabricated using low-temperature co-fired ceramic technology. These types of triodes offer advantages such as enabling more compact circuit designs at higher frequency bands, such as millimeter-wave bands, and ease of integration with other circuits.

[0039] In related technologies, due to the characteristics of their circuit structure, these three-way converters do not perform pre-frequency separation in the input channels. Instead, frequency separation is usually achieved by connecting filters to the three output channels at the back end of the impedance matching network. This results in a high design difficulty and workload in the design of the impedance matching network at the common port.

[0040] The following is combined Figures 1 to 4 This describes embodiments of the present application. For example... Figure 1 , Figure 2 As shown, this application provides a hybrid integrated millimeter-wave coaxial radial triode, including a first coaxial line 1, a dielectric substrate 2, three output circuits 3 disposed on the dielectric substrate 2, and a second coaxial line 4.

[0041] The first coaxial line 1 is used to input electromagnetic wave signals. The length of the first coaxial line 1 is arranged vertically, and the two surfaces of the first coaxial line 1 used for signal transmission are defined as the input surface and the output surface.

[0042] like Figure 1 , Figure 2 , Figure 3 As shown, the dielectric substrate 2 is connected to the bottom cross-section of the first coaxial line 1, and the three-way output circuit 3 is disposed on the upper surface of the dielectric substrate 2. The output circuit 3 includes a coaxial probe 31, an arc-shaped strip line 32 and a width abrupt change strip line 33 connected in sequence. At least one slit structure 34 is provided on the arc-shaped strip line 32. The coaxial probe 31, the arc-shaped strip line 32 and the width abrupt change strip line 33 are at least partially located inside the outer conductor metal sidewall 11 of the first coaxial line 1.

[0043] As can be seen from the above scheme, the present invention is ingeniously designed, compact in structure, and easy to implement and install in engineering. By utilizing a concentric arc strip line 32 inside the first coaxial line 1, which serves only as the transmission point for the excitation signal, and by designing a circuit on the arc strip line 32 to realize a bandpass filter structure, the signal excited and coupled by the coaxial probe 31 can be transmitted through the arc strip line 32 to three signals of different specific frequency bands to the standard microstrip line 36 connected to the outside of the first coaxial line 1. This effectively improves the problem of the difficulty and large workload in designing the common port impedance matching network in the traditional circuit structure design. Furthermore, the tripod circuit implemented in this application has the characteristic of compact structure. As a basic circuit scheme of tripod, a bandpass filter can be flexibly and conveniently cascaded on the standard microstrip line 36 of this structure circuit to further enhance the performance of the tripod. At the same time, it is also convenient to integrate with other circuits as needed when expanding circuit functions to realize a hybrid integrated circuit component with more functions.

[0044] like Figure 3 As shown, the arc strip 32 is perpendicular to the electric field component of the main mode of the first coaxial line 1. The arc strip 32 cannot be excited and coupled from the input signal, but can only provide a transmission channel for the signal excited and coupled by the coaxial probe 31. By setting one or more slot structures 34 with different spacing sizes at different positions on the arc strip 32, the bandpass filter function of the required passband frequency band can be realized.

[0045] It should be noted that, as Figure 3 As shown, by changing the structural dimensions of the coaxial probe 31 and the arc-shaped strip 32 on the dielectric substrate 2, their relative positions when inserted into the first coaxial line 1, and the dimensions of the slot structure 34, frequency pre-separation can be effectively performed in the input channel, thereby reducing the overall circuit size and making the overall structure compact.

[0046] In one embodiment, a second coaxial line 4 is further included. The second coaxial line 4 is short-circuited at its terminal and connected to the lower surface of the dielectric substrate 2. The cross-sectional dimensions of the second coaxial line 4 are the same as those of the first coaxial line 1.

[0047] In this embodiment, as Figure 2 , Figure 4As shown, the cross-sectional dimensions of the second coaxial line 4 are the same as those of the first coaxial line 1. The second coaxial line 4 is placed on the back side of the dielectric substrate 2. The inner and outer conductors of the second coaxial line 4 are precisely aligned with the inner and outer conductors of the first coaxial line 1. The first coaxial line 1, the dielectric substrate 2, and the second coaxial line 4 are tightly connected and assembled together. The second coaxial line 4, with its terminal short-circuited, is part of the circuit structure for realizing the three-way coupling output device with different frequency bands. By optimizing the distance between the dielectric substrate 2 and the short-circuit surface of the second coaxial line 4, the optimal output performance of the tripod can be obtained.

[0048] In one embodiment, such as Figure 3 As shown, the three coaxial probes 31 are arranged radially along the first coaxial line 1 at an asymmetrical included angle. Of course, the three coaxial probes 31 can also be connected via a 120°... 0 The symmetrical included angle is set radially along the first coaxial line 1, and the end of the coaxial probe 31 is connected to one end of the arc-shaped strip 32.

[0049] In one embodiment, such as Figure 3 As shown, a chamfer 5 is provided at the connection between the coaxial probe 31 and the arc-shaped strip 32, and the chamfer 5 faces the outer conductor metal sidewall 11 of the coaxial line. In this way, by chamfering the connection between the end of the coaxial probe 31 and the arc-shaped strip 32 to form the chamfer 5, the reflection of the signal when it is transmitted through this point can be reduced, and the signal transmission efficiency coupled by the coaxial probe 31 can be improved.

[0050] In one embodiment, the arc-shaped strip 32 is close to the outer conductor metal sidewall 11 of the coaxial line, and the center of the arc-shaped strip 32 is concentric with the center of the first coaxial line 1.

[0051] In this embodiment, as Figure 2 , Figure 3 As shown, the arc-shaped strip 32 is positioned near the inner wall of the outer conductor metal sidewall 11 of the coaxial line, and the arc-shaped strip 32 is concentric with the first coaxial line 1. In this way, because the arc-shaped strip 32 is perpendicular to the electric field of the main mode of the first coaxial line 1, it ensures that no additional excitation or coupling signal is received from the input signal on the arc-shaped strip 32; simultaneously, it also allows for an increase in the arc length of the arc-shaped strip 32, which is more conducive to the design of the bandpass filter circuit.

[0052] In one embodiment, multiple slit structures 34 are provided on the same arc-shaped strip 32, and the interval size of the multiple slit structures 34 is different.

[0053] In this embodiment, as Figure 3As shown, each of the three arc-shaped strip lines 32 has a slit structure 34. Each arc-shaped strip line 32 can have one slit structure 34, or multiple slit structures 34 with different spacing sizes can be set on each arc-shaped strip line 32. By using several slit structures 34 set at different positions and with different spacing sizes on the three arc-shaped strip lines 32, the three signals excited by the coaxial probe 31 can be transmitted along their respective arc-shaped strip lines 32, thus realizing the function of a bandpass filter that can only transmit the required signal frequency band.

[0054] In one embodiment, the edge of the width abrupt change line 33 facing the center of the first coaxial line 1 is set as an arc segment 331, and the center of the arc segment 331 is concentric with the center of the first coaxial line 1. The edge of the width abrupt change line 33 away from the center of the first coaxial line 1 is set as a straight line segment 332.

[0055] In this embodiment, as Figure 3 As shown, the other end of the arc-shaped strip 32, away from the coaxial probe 31, is connected to a strip with a width abrupt change along the outer edge of the arc-shaped strip 32. The arc segment 331 of the width abrupt strip 33 is still concentric with the arc-shaped strip 32, that is, the arc segment 331 of the width abrupt strip 33 is concentric with the center of the first coaxial line 1, while the straight segment 332 of the width abrupt strip 33 is used to connect to the impedance matching circuit 35.

[0056] In one embodiment, the output circuit 3 further includes an impedance matching circuit 35 and a standard microstrip line 36 connected in sequence. At least a portion of the impedance matching circuit 35 and the standard microstrip line 36 are located outside the outer conductor metal sidewall 11 of the coaxial line. The impedance matching circuit 35 is connected to the straight segment 332 of the width-change-off strip line 33. The circuit composed of the cascaded impedance matching circuit 35 and the standard microstrip line 36 in the three-way output circuit 3 is arranged radially along the first coaxial line 1 with a 120° symmetrical included angle between them, and the standard microstrip line 36 is a 50-ohm standard microstrip line.

[0057] In one embodiment, it further includes three opening slots 6 extending from the inner sidewall of the coaxial line outer conductor metal sidewall 11, all three opening slots 6 communicating with the interior of the coaxial line outer conductor metal sidewall 11; wherein, the connection point of the width abrupt change line 33 and the impedance matching circuit 35 corresponds to the inner wall of the coaxial line outer conductor metal sidewall 11, or the connection point of the width abrupt change line 33 and the impedance matching circuit 35 is located within the opening slots 6.

[0058] In this embodiment, as Figure 1 , Figure 2 , Figure 3As shown, at the end of the outer conductor metal sidewall 11 of the coaxial line, corresponding to the position of the output circuit 3 on the dielectric substrate 2, three opening slots 6 are respectively made to allow the output circuit 3 to pass smoothly through the outer conductor metal sidewall 11 of the coaxial line. Using the impedance matching circuits 35 connected to the straight segments 332 on the outer edges of the three abrupt width strip lines 33, the three signal output channels are formed by the microstrip line structure through the opening slots 6 on the outer conductor metal sidewall 11 of the coaxial line, with a symmetrical included angle of 120° to each other, radially outward along the first coaxial line 1.

[0059] Understandably, the circumferential length of the abruptly wide strip 33 is less than the width of the slot 6. The straight segment 332 of the outer edge of the abruptly wide strip 33, at the connection point with the impedance matching circuit 35, must be located at least on the inner circle of the outer conductor metal sidewall 11 of the coaxial line, or slightly inside the area of ​​the outer conductor metal sidewall 11. This ensures that the impedance matching circuit 35 connected to the abruptly wide strip 33 is not located inside the first coaxial line 1 at the connection point, thus preventing the impedance matching circuit 35 from exciting and coupling additional output signals. Furthermore, the open-circuit segment of the abruptly wide strip 33 on the other side of the connection point with the impedance matching circuit 35, along with the impedance matching circuit 35, work together to coordinate the overall circuit design during the signal conversion and transmission from the arc strip 32 to the outer output strip of the first coaxial line 1.

[0060] In one embodiment, at least one first circuit 7 is provided on the lower surface of the dielectric substrate 2. The first circuit 7 is configured in a rectangular or circular shape and is provided corresponding to the terminal short surface of the second coaxial line 4.

[0061] In this embodiment, as Figure 4 As shown, on the back of the dielectric substrate 2, in the area corresponding to the short surface of the second coaxial line 4, one or more independent first circuits 7 are provided. The first circuit 7 can be rectangular or circular. The first circuit 7 is used to further assist in the design of the distance between the dielectric substrate 2 and the short surface, so as to ensure that the three output signals have good transmission performance under the same structural size of the short surface.

[0062] To better understand the above-mentioned objectives, features, and advantages of this application, the following is combined with... Figures 5-10 The present application will be further described with reference to specific embodiments.

[0063] In practical engineering applications, this embodiment uses the existing commercially available integrated K connector 8 as the signal input terminal. The inner core diameter of the K connector 8 is 0.635mm and the inner core length is 8.1mm.

[0064] After assembling connector 8 in this embodiment, as follows: Figure 5 As shown, with Figure 1 As shown in the circuit structure, in addition to the original coaxial cable segment c, two new coaxial cables a and b with different structural dimensions have been added to the signal input terminal. The three coaxial cables are configured as follows: coaxial cable a uses the inner core of connector 8 (0.635mm in diameter) as the inner conductor, with an outer conductor inner diameter of 3mm and a length of 4mm; coaxial cable b also uses the inner core of connector 8 as the inner conductor (0.635mm in diameter), with an outer conductor inner diameter of 12.6mm and a length of 1.8mm; coaxial cable c has an inner conductor diameter of 2.25mm and an outer conductor inner diameter of 12.6mm (the same as coaxial cable b). The distance between the connection surface of coaxial cables b and c and the dielectric substrate 2 is 1.82mm, thus forming the entire input signal channel.

[0065] The circuit functions of the tripod are mainly accomplished by the circuits on the upper and lower surfaces of the dielectric substrate 2 placed on the cross-section of the coaxial line. The dielectric substrate 2 is made of Rogers RT / duroid 5880 material with a thickness of 0.254mm.

[0066] On the front side of the dielectric substrate 2 located inside the coaxial line, as shown Figure 3 As shown, three circuits are independently laid out, each consisting of a coaxial probe 31, an arc-shaped stripline 32 containing a bandpass filter, and a stripline 33 with a sudden width change, all connected in series. The three coaxial probes 31 are interconnected at 128° intervals. 0 105 0 127 0The asymmetric included angle is set radially along the coaxial line. The tripod circuit is used to excite and couple the first output branch of a signal with a center frequency of 28.5 GHz. The length and width of the coaxial probe 31 are 4.3 mm and 0.498 mm, respectively. The length and width of the arc strip 32 are 9.89 mm and 0.51 mm, respectively. The distance between the arc strip 32 and the inner edge of the outer conductor metal sidewall 11 of the coaxial line is 0.2 mm. The straight segment 332 of the width abrupt change strip 33 has a length of 1.45 mm. The gap dimensions of the three coupling gaps are 0.05 mm, 0.58 mm, and 0.05 mm, respectively. The second output branch is used to excite and couple a signal with a center frequency of 35 GHz. The length and width of the coaxial probe 31 are 4.52 mm and 0.4 mm, respectively. The length and width of the arc strip 32 are 9.14 mm and 0.39 mm, respectively. The distance between the strip 32 and the inner edge of the outer conductor metal sidewall 11 of the coaxial line is 0.2 mm. The length of the straight segment 332 of the strip 33 with abrupt width change is 1.12 mm. The gap dimensions of the three coupling gaps are 0.05 mm, 0.65 mm, and 0.05 mm, respectively. The third output branch used to excite the coupling of a signal with a center frequency of 39 GHz has a coaxial probe 31 with a length and width of 4.53 mm and 0.46 mm, respectively. The length and width of the arc strip 32 are 8.28 mm and 0.29 mm, respectively. The distance between the arc strip 32 and the inner edge of the outer conductor metal sidewall 11 of the coaxial line is 0.2 mm. The length of the straight segment 332 of the strip 33 with abrupt width change is 1.44 mm. The gap dimensions of the three coupling gaps are 0.05 mm, 0.63 mm, and 0.05 mm, respectively. The three output branches are connected to the width-change-of-strip line 33, and after passing through the coaxial line outer conductor metal sidewall 11 and the impedance matching circuit 35 on the outside of the coaxial line outer conductor metal sidewall 11, they are finally output at a symmetrical angle of 120° to each other and with a standard microstrip line 36 of 50 ohms.

[0067] The distance between the back surface of the dielectric substrate 2 and the short-circuit surface at the end of the second coaxial cable 4 is 1.5 mm. On the back surface of the dielectric substrate 2 inside the second coaxial cable 4, as... Figure 4 As shown, three independent rectangular circuits were fabricated with lengths and widths of 1mm, 0.78mm, 0.6mm, and 0.4mm, and 1mm and 0.4mm, respectively, to coordinate, compensate for, and balance the transmission performance of the three output signals under the dimensions of this short circuit.

[0068] Depend on Figure 6 , Figure 7 , Figure 8 , Figure 9As shown, the triplet has an insertion loss of less than 0.9dB at the output port in the passband within the three output frequency ranges of 27.5-29.5GHz, 33.7-36GHz and 38.5-39.5GHz, and an input return loss of better than -15dB in the passband.

[0069] Depend on Figure 10 As shown, the isolation is better than -12dB throughout the Ka band, and exceeds -60dB at its highest point.

[0070] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A hybrid integrated millimeter wave coaxial radial triplexer, comprising: include: The first coaxial line (1) is used to input electromagnetic wave signals; The dielectric substrate (2) is connected to the bottom cross-section of the first coaxial line (1); Three output circuits (3) are disposed on the upper surface of the dielectric substrate (2). The output circuits (3) include a coaxial probe (31), an arc strip line (32) and a width abrupt change strip line (33) connected in sequence. At least one slit structure (34) is provided on the arc strip line (32). At least a portion of the width abrupt change band (33) and the coaxial probe (31) and the arc band (32) are located inside the outer conductor metal sidewall (11) of the first coaxial line (1).

2. The hybrid integrated millimeter wave coaxial radial triplexer of claim 1, wherein, It also includes a second coaxial line (4), the second coaxial line (4) is short-circuited at its terminal and connected to the lower surface of the dielectric substrate (2), and the cross-sectional dimensions of the second coaxial line (4) are the same as those of the first coaxial line (1).

3. The hybrid integrated millimeter-wave coaxial radial tripod according to claim 1, characterized in that, The three coaxial probes (31) are arranged radially along the first coaxial line (1) with an asymmetrical included angle.

4. The hybrid integrated millimeter-wave coaxial radial tripod according to claim 1, characterized in that, The connection between the coaxial probe (31) and the arc-shaped strip (32) is provided with a chamfer (5), and the chamfer (5) faces the outer conductor metal sidewall (11) of the coaxial line.

5. The hybrid integrated millimeter-wave coaxial radial tripod according to claim 1, characterized in that, The arc-shaped strip (32) is close to the outer conductor metal sidewall (11) of the coaxial line, and the center of the arc-shaped strip (32) is concentric with the center of the first coaxial line (1).

6. The hybrid integrated millimeter-wave coaxial radial tripod according to claim 1, characterized in that, Multiple slot structures (34) are provided on the same arc line (32), and the spacing between the multiple slot structures (34) is different.

7. The hybrid integrated millimeter-wave coaxial radial tripod according to claim 1, characterized in that, The edge of the width abrupt change line (33) facing the center of the first coaxial line (1) is set as an arc segment (331), and the center of the arc segment (331) is concentric with the center of the first coaxial line (1). The edge of the width abrupt change line (33) away from the center of the first coaxial line (1) is set as a straight line segment (332).

8. The hybrid integrated millimeter-wave coaxial radial tripod according to claim 7, characterized in that, The output circuit (3) further includes an impedance matching circuit (35) and a standard microstrip line (36) connected in sequence. At least a portion of the impedance matching circuit (35) and the standard microstrip line (36) are located outside the outer metal sidewall (11) of the coaxial line. The impedance matching circuit (35) is connected to the straight segment (332) of the width abrupt strip line (33). In the three output circuits (3), the circuit composed of the impedance matching circuit (35) and the standard microstrip line (36) is arranged radially along the first coaxial line (1) with a 120° symmetrical included angle, and the standard microstrip line (36) is a 50-ohm standard microstrip line.

9. The hybrid integrated millimeter-wave coaxial radial tripod according to claim 8, characterized in that, It also includes three opening slots (6) extending from the metal sidewall (11) of the coaxial line outer conductor, and all three opening slots (6) are connected to the interior of the metal sidewall (11) of the coaxial line outer conductor; The connection point of the width abrupt change line (33) and the impedance matching circuit (35) is located at the inner wall of the outer conductor metal sidewall (11) of the coaxial line, or the connection point of the width abrupt change line (33) and the impedance matching circuit (35) is located in the opening slot (6).

10. The hybrid integrated millimeter-wave coaxial radial tripod according to claim 2, characterized in that, At least one first circuit (7) is provided on the lower surface of the dielectric substrate (2). The first circuit (7) is configured in a rectangular or circular shape and is configured to correspond to the terminal short surface of the second coaxial line (4).

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