A low-frequency, broadband, high-power, compact impedance converter

Abstract

The present invention relates to a low-frequency, broadband, high-power, compact impedance transformer, comprising a rectangular coaxial impedance transformer and a coaxial quick-connect connector connected to the rectangular coaxial impedance transformer. The rectangular coaxial impedance transformer comprises a base plate and a cover plate, which are fixedly connected by bolts. An inner conductor is provided at the upper end of the base plate, and an interface is provided at the lower end of the base plate, through which the coaxial quick-connect connector connects to the inner conductor. The present invention employs a rectangular coaxial coiled structure for the impedance transformation section of the inner conductor to reduce its axial length. The inner conductor is disposed on a dielectric plate C and secured via a dielectric plate D, thereby resolving the difficulty of mechanically processing the dielectric plate D. Furthermore, the overall compact design meets the client's requirements for a smaller installation space.

Description

Technical Field

[0001] The present invention relates to the technical field of impedance converters, and in particular to a low-frequency, broadband, high-power, compact impedance converter. Background Art

[0002] An impedance converter is a passive device, usually referring to one or more transmission lines inserted between two transmission lines that need to be matched. The performance of the impedance converter will affect the matching effect.

[0003] The length of the impedance transformer mainly depends on the length of the impedance transformation section, which is closely related to the operating frequency, impedance transformation ratio, and maximum allowable voltage standing wave ratio of the product. When the impedance transformation ratio is ≤2, the length of the single impedance transformation section is 1 / 4 of the wavelength corresponding to the center frequency point within the operating frequency. When the impedance transformation ratio is greater than 2, the impedance transformation section adopts a gradient line shape, and the length of the impedance transformation section is at least 1 / 2 or more of the wavelength corresponding to the lowest operating frequency. In this way, in applications with lower frequencies, the existing coaxial impedance transformers, such as the attached Figure 14 As shown, the axial length is often very long, and when the impedance transformation ratio is greater than 2 and the operating frequency is low, it cannot meet the client's requirement for a smaller installation space, and the mechanical processing of each dielectric plate is more difficult. Summary of the Invention

[0004] The present invention proposes a low-frequency, broadband, high-power, compact impedance transformer. The inner conductor impedance transformation segment adopts a flat, incremental rectangular coaxial coil impedance transformation segment to reduce the axial length. The inner conductor is arranged on a dielectric plate C and fixed by a dielectric plate D, which solves the problem of difficult mechanical processing of the dielectric plate D. At the same time, the overall appearance is compact, which can meet the client's requirements for a smaller installation space.

[0005] In order to solve the problems in the above background technology, the present invention is achieved through the following technical solutions:

[0006] A low-frequency, broadband, high-power, compact impedance transformer comprises a rectangular coaxial impedance transformer and a coaxial quick-connect connector connected to the rectangular coaxial impedance transformer; the rectangular coaxial impedance transformer comprises a base plate and a cover plate; an inner conductor is provided at the upper end of the base plate; the inner conductor has a G-shaped flat structure; an interface A is provided at the lower end of the base plate, through which the coaxial quick-connect connector is connected to a 50Ω microstrip port provided at one end of the inner conductor; a vertical 10Ω microstrip port provided at the other end of the inner conductor passes through the cover plate.

[0007] Preferably, an impedance transformation section is provided between the 50Ω microstrip port and the vertical 10Ω microstrip port; the impedance transformation section is a flat incremental rectangular coaxial coiled impedance transformation section.

[0008] Preferably, the coaxial quick-plug connector includes a 50Ω male quick-plug port and a quick-plug female socket; the 50Ω male quick-plug port includes a housing, a first insulator and a pin; one end of the pin is fixed in the housing through the first insulator; the other end of the pin is connected to the 50Ω microstrip port;

[0009] The elastic petal provided on the quick-connect female seat is inserted into one end of the shell, elastically connected to the shell, and limited by the limiting step E provided on the quick-connect female seat; the other end of the shell is threadedly connected to the interface A.

[0010] Preferably, a dielectric plate C mounting groove is provided at the upper end of the base plate, a dielectric plate C is provided in the dielectric plate C mounting groove, and an inner conductor mounting groove and a dielectric plate D mounting groove are respectively provided at the upper end of the dielectric plate C; the inner conductor and the dielectric plate D are respectively provided in the inner conductor mounting groove and the dielectric plate D mounting groove, and the 50Ω microstrip port provided on the inner conductor and the impedance transformation section are located between the dielectric plate C and the dielectric plate D; the dielectric plate C and the dielectric plate D are both coaxially provided with a connecting hole communicating with the interface A; the pin is connected to the 50Ω microstrip port through the connecting hole.

[0011] Preferably, the dielectric plate C is further provided with a second insulator, the lower end of which is connected to the dielectric plate C; the upper end of the second insulator is provided with a limiting step F; the dielectric plate D is provided with a third insulator, the lower end of the third insulator is connected to the dielectric plate D, and the upper end of the third insulator is provided with a limiting step G that cooperates with the limiting step F; the vertical 10Ω microstrip port is provided between the limiting step F and the limiting step G, and passes through the interface B provided on the cover plate.

[0012] Preferably, the lower end of the dielectric plate D is arranged in the dielectric plate D installation groove; the upper end of the dielectric plate D is provided with a plurality of convex strips.

[0013] Preferably, the base plate and the cover plate are fixedly connected by bolts; and a protrusion is provided around the threaded hole provided on the upper end of the cover plate.

[0014] Compared with the prior art, the present invention has the following beneficial technical effects:

[0015] 1. The impedance transformation section of the inner conductor adopts a flat incremental rectangular coaxial coil impedance transformation section to reduce the axial length; the 50Ω microstrip port provided on the inner conductor is connected to the 50Ω male quick-connect port, and the impedance is transformed through the impedance transformation section, and the output is through the vertical 10Ω microstrip port at the upper end of the inner conductor.

[0016] 2. The dielectric plate C has an inner conductor mounting groove and a dielectric plate D mounting groove for mounting the inner conductor and the dielectric plate D and supporting the inner conductor and the dielectric plate D. Since the inner conductor mounting groove and the dielectric plate D mounting groove are both provided on the dielectric plate C, the processing difficulty of the dielectric plate D is reduced.

[0017] 3. Several ridges are provided on the upper end of the dielectric plate D to reduce the contact surface between the cover plate and the dielectric plate D after assembly, thereby preventing the dielectric plate D from being crushed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the explosion structure of the present invention;

[0020] Figure 3 This is a schematic structural diagram of the coaxial quick-connect connector of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of a 50Ω male quick-plug port of the present invention;

[0022] Figure 5 This is a schematic diagram of the main structure of the base plate of the present invention;

[0023] Figure 6 Schematic diagram of the rear structure of the base plate of the present invention;

[0024] Figure 7 Schematic diagram of the installation structure of dielectric plate C, dielectric plate D and inner conductor of the present invention;

[0025] Figure 8 for Figure 7 Schematic diagram of the structure of the medium plate C;

[0026] Figure 9 for Figure 7 Schematic diagram of the structure of the medium plate D;

[0027] Figure 10 for Figure 7 Schematic diagram of the structure of the inner conductor;

[0028] Figure 11 for Figure 7 A schematic diagram of the top view of the inner conductor;

[0029] Figure 12 This is a schematic diagram of the main structure of the cover plate in the present invention;

[0030] Figure 13 Schematic diagram of the rear structure of the cover plate in the present invention;

[0031] Figure 14 Schematic diagram of the structure of a coaxial impedance converter in the prior art.

[0032] Description of Reference Numerals

[0033] 100. Base plate; 101. Cover plate; 102. Inner conductor; 103. Interface A; 104. Dielectric plate C mounting slot; 105. Dielectric plate C; 106. Inner conductor mounting slot; 107. Dielectric plate D mounting slot; 108. Dielectric plate D; 109. Second insulator; 110. Limiting step F; 111. Third insulator; 112. Limiting step G; 113. Impedance transformation section; 114. Vertical 10Ω microstrip port; 115. Interface B; 116. Raised strip; 117. Bump; 118. 50Ω microstrip port; 200. 50Ω male quick-connect port; 201. Quick-connect female socket; 202. Housing; 203. First insulator; 204. Pin; 205. Elastic flap; 206. Limiting step E; 300. Bolt. DETAILED DESCRIPTION

[0034] like Figures 1-13 A low-frequency, broadband, high-power, compact impedance transformer includes a rectangular coaxial impedance transformer and a coaxial quick-plug connector connected to the rectangular coaxial impedance transformer. The rectangular coaxial impedance transformer includes a base plate 100 and a cover plate 101. An inner conductor 102 is provided at the upper end of the base plate 100. The inner conductor 102 has a G-shaped flat structure. An interface A103 is provided at the lower end of the base plate 100. The coaxial quick-plug connector is connected to a 50Ω microstrip port 118 provided at one end of the inner conductor 102 through the interface A103. A vertical 10Ω microstrip port 114 provided at the other end of the inner conductor 102 passes through the cover plate 101.

[0035] An impedance transformation section 113 is provided between the 50Ω microstrip port 118 and the vertical 10Ω microstrip port 114. The impedance transformation section 113 is a flat incremental rectangular coaxial coiled impedance transformation section. Figure 10 It can be seen that the impedance transformation section 113 is set to a flat incremental rectangular coaxial coil impedance transformation section structure, which transforms the impedance from 50Ω to 10Ω. The impedance transformation section 113 reduces the axial length through the flat design and the incremental rectangular coaxial coiling.

[0036] The coaxial quick-connect connector includes a 50Ω male quick-connect port 200 and a quick-connect female socket 201. The 50Ω male quick-connect port 200 includes a housing 202, a first insulator 203, and a pin 204. One end of the pin 204 is fixed in the housing 202 through the first insulator 203. The other end of the pin 204 is connected to the 50Ω microstrip port 118.

[0037] The elastic petal 205 provided on the quick-connect female socket 201 is inserted into one end of the shell 202, elastically connected to the shell 202, and limited by the limiting step E206 provided on the quick-connect female socket 201; the other end of the shell 202 is threadedly connected to the interface A103.

[0038] A dielectric plate C mounting slot 104 is provided at the top end of the base plate 100. A dielectric plate C105 is provided within the dielectric plate C mounting slot 104. An inner conductor mounting slot 106 and a dielectric plate D mounting slot 107 are provided at the top end of the dielectric plate C105. The inner conductor 102 and the dielectric plate D108 are respectively disposed within the inner conductor mounting slot 106 and the dielectric plate D108. The 50Ω microstrip port 118 and the impedance transformation section 113 provided on the inner conductor 102 are located between the dielectric plates C105 and D108. Both the dielectric plates C105 and D108 are coaxially provided with connection holes that communicate with the interface A103. The pin 204 passes through the connection hole and is connected to the 50Ω microstrip port 118.

[0039] Dielectric plate C105 also has a second insulator 109, the lower end of which is connected to dielectric plate C105; a stopper step F110 is provided on the upper end of second insulator 109; dielectric plate D108 has a third insulator 111, the lower end of which is connected to dielectric plate D108, and a stopper step G112 is provided on the upper end of third insulator 111, which mates with stopper step F110. A vertical 10Ω microstrip port 114 is located between stopper steps F110 and G112 and passes through an interface B115 provided on cover plate 101. Dielectric plate C105 and dielectric plate D108 are connected together via the stopper steps F110 and G112 provided on second insulator 109 and third insulator 111, respectively.

[0040] The lower end of dielectric plate D108 is positioned within dielectric plate D mounting slot 107. The upper end of dielectric plate D108 is provided with a plurality of raised strips 116. These raised strips 116 are used to reduce the contact surface between cover plate 101 and dielectric plate D108 during assembly, preventing dielectric plate D108 from being crushed.

[0041] The bottom plate 100 and the cover plate 101 are fixedly connected by bolts 300. The top of the cover plate 101 is provided with a protrusion 117 around the threaded hole. The protrusion 117 is provided around the threaded hole to reduce the effect of the flatness of the cover plate 101 on the tightening of the bolt 300.

[0042] Installation steps of the present invention:

[0043] 1. Connect the housing 202 of the 50Ω male quick-connect port 200 to the base plate 100 through the interface A103;

[0044] 2. Place the inner conductor 102 into the inner conductor mounting slot 106 of the dielectric plate C105. Connect the second insulator 109 to the dielectric plate C105. Place the combination of the dielectric plate C105 and the inner conductor 102 into the dielectric plate C mounting slot 104 of the base plate 100.

[0045] 3. Solder the pin 204 of the 50Ω male quick-connect port 200 to the 50Ω microstrip port 118 of the inner conductor 102;

[0046] 4. After connecting the third insulator 111 to the dielectric plate D108, place it into the dielectric plate D mounting slot 107 of the dielectric plate C105. The stopper G112 of the third insulator 111 is connected to the stopper F110 of the second insulator 109. At this point, the vertical 10Ω microstrip port 114 of the inner conductor 102 is located between the stopper G11 and the stopper F110.

[0047] 5. Connect and fix the cover plate 101 and the base plate 100 with bolts 300; pass the vertical 10Ω microstrip port 114 through the interface B115; connect the vertical 10Ω microstrip port 114 to the client port for impedance output.

Claims

1. A low-frequency, broadband, high-power, compact impedance converter, characterized by: The invention comprises a rectangular coaxial impedance transformer and a coaxial quick-plug connector connected to the rectangular coaxial impedance transformer; the rectangular coaxial impedance transformer comprises a base plate (100) and a cover plate (101); an inner conductor (102) is provided at the upper end of the base plate (100); the inner conductor (102) is a G-shaped flat structure; an interface A (103) is provided at the lower end of the base plate (100); the coaxial quick-plug connector is connected to a 50Ω microstrip port (118) provided at one end of the inner conductor (102) through the interface A (103); a vertical 10Ω microstrip port (114) provided at the other end of the inner conductor (102) passes through the cover plate (101); An impedance transformation section (113) is provided between the 50Ω microstrip port (118) and the vertical 10Ω microstrip port (114); the impedance transformation section (113) is a flat incremental rectangular coaxial coiled impedance transformation section.

2. The low-frequency, broadband, high-power, compact impedance converter according to claim 1, characterized in that: The coaxial quick-plug connector comprises a 50Ω male quick-plug port (200) and a quick-plug female socket (201); the 50Ω male quick-plug port (200) comprises a housing (202), a first insulator (203) and a pin (204); one end of the pin (204) is fixed in the housing (202) via the first insulator (203); the other end of the pin (204) is connected to the 50Ω microstrip port (118); The elastic petal (205) provided on the quick-connect female seat (201) is inserted into one end of the housing (202), elastically connected to the housing (202), and limited by a limiting step E (206) provided on the quick-connect female seat (201); the other end of the housing (202) is threadedly connected to the interface A (103).

3. The low-frequency, broadband, high-power, compact impedance converter according to claim 2, characterized in that: The upper end of the bottom plate (100) is provided with a dielectric plate C mounting groove (104), a dielectric plate C (105) is provided in the dielectric plate C mounting groove (104), and the upper end of the dielectric plate C (105) is respectively provided with an inner conductor mounting groove (106) and a dielectric plate D mounting groove (107); the inner conductor (102) and the dielectric plate D (108) are respectively provided in the inner conductor mounting groove (106) and the dielectric plate D mounting groove (107), and the 50Ω microstrip port (118) provided on the inner conductor (102) and the impedance transformation section (113) are located between the dielectric plate C (105) and the dielectric plate D (108); the dielectric plate C (105) and the dielectric plate D (108) are both coaxially provided with a connection hole communicating with the interface A (103); the pin (204) passes through the connection hole and is connected to the 50Ω microstrip port (118).

4. The low-frequency, broadband, high-power, compact impedance converter according to claim 3, characterized in that: The dielectric plate C (105) is further provided with a second insulator (109), the lower end of which is connected to the dielectric plate C (105); the upper end of the second insulator (109) is provided with a limiting step F (110); the dielectric plate D (108) is provided with a third insulator (111), the lower end of which is connected to the dielectric plate D (108), and the upper end of the third insulator (111) is provided with a limiting step G (112) that cooperates with the limiting step F (110); the vertical 10Ω microstrip port (114) is provided between the limiting step F (110) and the limiting step G (112), and passes through an interface B (115) provided on the cover plate (101).

5. The low-frequency, broadband, high-power, compact impedance converter according to claim 4, characterized in that: The lower end of the dielectric plate D (108) is arranged in the dielectric plate D mounting groove (107); the upper end of the dielectric plate D (108) is provided with a plurality of convex strips (116).

6. The low-frequency, broadband, high-power, compact impedance converter according to claim 1, characterized in that: The bottom plate (100) and the cover plate (101) are fixedly connected by bolts (300); a protrusion (117) is provided around the threaded hole provided at the upper end of the cover plate (101).

Images