Adjustable high-precision equal-phase load structure

Abstract

The utility model relates to a radio frequency coaxial load structure, and provides an adjustable high-precision equal-phase load structure in order to solve the problem that the existing radio frequency coaxial load is inconsistent in electrical length, and the adjustable high-precision equal-phase load structure comprises an outer shell, an insulating medium, an inner conductor, a load resistance tuning assembly and a rear cover, the rear end of the inner conductor extension section is provided with a blind hole, and an elastic body is arranged in the inner conductor extension section; the load resistor tuning assembly comprises a tuning bushing and a load resistor, the tuning bushing is of a horn structure, an elastic clamping seat is arranged on a through hole in the small end of the tuning bushing, the front end of the load resistor penetrates through the blind hole and then is connected with the inner conductor through an elastic body, and the rear end of the load resistor penetrates through the through hole in the small end of the tuning bushing and is connected with the elastic clamping seat; a tuning external thread is arranged on the circumferential face of the outer side of the tuning lining, a tuning internal thread matched with the tuning external thread is arranged on the inner wall of the outer shell, and the phase relation among the load resistor, the elastic body and the outer shell can be adjusted through the elastic clamping base.

Description

TECHNICAL FIELD

[0001] The utility model relates to a radio frequency coaxial load structure, concretely relates to an adjustable high-precision equal-phase load structure. BACKGROUND

[0002] Radio frequency coaxial load is a key element in radio frequency system, is used for absorbing signal energy and provides impedance matching, ensures signal transmission quality, radio frequency coaxial load is usually composed of a resistor and a capacitor, resistor is used for absorbing power, capacitor is used for matching impedance, and it is widely used in radio equipment, electronic instrument, radar, satellite communication, medical equipment and other fields.

[0003] In radio communication system, radio frequency coaxial load is used for testing and calibrating radio equipment to ensure the performance and reliability of equipment, in radar system, radio frequency coaxial load is used for absorbing the energy of radar emission to avoid reflection and interference, and the voltage standing wave ratio of radio frequency coaxial load is an important index to measure the matching of system, and the phase consistency has a greater influence on the precision of system performance index, therefore, how to ensure the phase consistency of radio frequency coaxial load resistance and improve the precision of system performance index is an important problem to be solved at present.

[0004] The existing radio frequency coaxial load usually adopts rod-shaped resistance and radio frequency coaxial part to realize the connection through welding or insertion, and the resistance size of this connection mode can be influenced by machining mode or indefinite factors in machining process, so that the machining size cannot be adjusted, and also cannot be completely consistent, the machining size tolerance is larger, the resistance value stability is poor, and then the electrical length of radio frequency coaxial load is inconsistent, causes the resistance phase difference to be larger, and the voltage standing wave ratio performance index is unstable, which seriously affects the precision of system performance index. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the technical problems, such as the inconsistent electrical length of the existing radio frequency coaxial load, and the inability to adjust, leading to low voltage standing wave ratio and system performance index precision, and proposes a kind of adjustable high-precision equal-phase load structure.

[0006] To achieve the above-mentioned purpose, the technical solution provided by the utility model is as follows:

[0007] An adjustable high-precision equal-phase load structure, comprising an outer shell and an insulating medium, a load resistance tuning assembly and a rear cover coaxially arranged in the outer shell from front to rear, an inner conductor is arranged in the insulating medium, and the special feature is that:

[0008] The rear end of the inner conductor is provided with an inner conductor extension, a blind hole is formed in the rear end of the inner conductor extension, an elastomer is arranged in the inner conductor extension, and the other end of the elastomer is located in the blind hole and connected with the load resistance tuning assembly.

[0009] The load resistance tuning assembly comprises a tuning bushing and a load resistance arranged in the tuning bushing, the tuning bushing is a horn structure, the large end of which is close to a blind hole, and the small end of which is provided with an elastic clamping seat on the through hole, the front end of the load resistance is connected with the elastic body after extending into the blind hole, and is connected with the inner conductor through the elastic body and the inner conductor extension in turn, and the rear end of the load resistance is connected with the elastic clamping seat through the through hole of the small end of the tuning bushing.

[0010] The outer side of the tuning bushing is provided with a tuning external thread, and the inner wall of the outer shell body is provided with a tuning internal thread matched with the tuning external thread, the axial position relationship between the tuning external thread and the tuning internal thread is changed by rotating the tuning bushing, and then the phase relationship between the load resistance and the outer shell body is changed.

[0011] Further, a plurality of first split grooves penetrating the end portions are axially arranged on the outer side of the blind hole, and the plurality of first split grooves divide the blind hole into a petal-shaped elastic structure, and the front end of the load resistance is connected with the blind hole through the petal-shaped elastic structure.

[0012] Further, the elastic body is an elastic spring, which is used to compress or release the elastic spring by driving the load resistance through the tuning bushing, so that the load resistance moves axially relative to the outer shell body, thereby adjusting the phase of the radio frequency coaxial load.

[0013] Further, the inner conductor is provided with a fixing device on the outer side of the middle part, which is used to fix the inner conductor.

[0014] Further, a plurality of second split grooves penetrating the end portions are axially arranged on the outer side of the elastic clamping seat, and the plurality of second split grooves divide the elastic clamping seat into a petal-shaped elastic structure, and the rear end of the load resistance is fixed in the elastic clamping seat through the petal-shaped elastic structure.

[0015] Further, the outer side of the rear cover is provided with a mounting external thread, and the inner wall of the outer shell body is provided with a mounting internal thread matched with the mounting external thread, and the rear cover is embeddedly installed in the outer shell body through the cooperation of the mounting external thread and the mounting internal thread.

[0016] Further, a plurality of openings are uniformly arranged on the outer circumference of the small end of the tuning bushing, which are used to cooperate with a screwdriver to adjust the relative position relationship between the tuning bushing and the outer shell body.

[0017] Further, the inner wall of the outer shell body and the connecting end surface of the insulating medium are further provided with a fixed shell, which is used to keep the stability of the insulating medium and the inner conductor.

[0018] Further, the front end of the outer shell body is provided with a shielding ring.

[0019] Further, the blind hole is a stepped hole, the elastic body is arranged in a small hole of the stepped hole and extends out of the small hole, and a front end of the load resistor extends into a large hole of the stepped hole and abuts against the elastic body.

[0020] The utility model discloses the beneficial effect of:

[0021] [1] The adjustable high-precision equal-phase load structure can provide stable signal transmission, has good structural stability and reliability, is easy to install and maintain, has strong mechanical connectivity, has low manufacturing cost, is suitable for various electric connector interface forms, has strong universality, the phase of the radio frequency load can be accurately adjusted through the tuning bushing and the elastic body, the phase difference of the same batch or different batches of radio frequency loads is ensured to be same, the requirement of system signal to phase consistency is met, and the voltage standing wave ratio performance index precision and system performance index precision are greatly improved.

[0022] [2] The utility model discloses the elastic body is connected with the inner conductor and load resistor, and the electric length of radio frequency coaxial load can be accurately adjusted through changing the compression amount and release amount of the elastic body, and system performance index precision is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the structural schematic diagram of the utility model discloses a kind of adjustable high-precision equal-phase load structure;

[0024] Figure 2 It is the structural schematic diagram of the inner conductor extension section in the embodiment of the utility model;

[0025] Figure 3 It is the structural schematic diagram of the tuning bushing in the embodiment of the utility model;

[0026] Figure 4 It is the left view of the tuning bushing in the embodiment of the utility model;

[0027] Reference signs:

[0028] 1-outer shell, 2-insulating medium, 3-rear cover, 4-inner conductor, 5-inner conductor extension section, 6-elastic body, 7-tuning bushing, 8-load resistor, 9-elastic clamping seat, 10-blind hole, 11-tuning external thread, 12-tuning internal thread, 13-fixing device, 14-second split groove, 15-mounting external thread, 16-mounting internal thread, 17-aperture, 18-fixing shell, 19-shielding ring. DETAILED DESCRIPTION

[0029] As Figure 1As shown in the figure, the adjustable high-precision equal-phase load structure comprises an outer shell 1, an insulating medium 2, an inner conductor 4, a load resistor 8 and a rear cover 3 which are coaxially arranged in the outer shell 1 from front to back, the front end of the outer shell 1 is provided with a shielding ring 19, the inner conductor 4 is installed in the insulating medium 2, and a fixed shell 18 is further arranged on the connecting end face between the inner wall of the outer shell 1 and the insulating medium 2, for keeping the stability of the insulating medium 2 and the inner conductor 4, a fixing device 13 is arranged on the outer side of the middle part of the inner conductor 4, for fixing the inner conductor 4.

[0030] The rear end of the inner conductor 4 is provided with an inner conductor extension section 5, as shown in the figure, Figure 2 The rear end of the inner conductor extension section 5 is provided with a blind hole 10, a plurality of first split grooves are arranged on the outer side of the circumference of the blind hole 10 in the axial direction, and the plurality of first split grooves divide the blind hole 10 into a petal-shaped elastic structure; an elastic body 6 is arranged in the inner conductor extension section 5, the other end of the elastic body 6 is located in the blind hole 10 and connected with the load resistor 8; the load resistor tuning assembly comprises a tuning bushing 7 and the load resistor 8 arranged in the tuning bushing 7, as shown in the figure, Figure 3 The tuning bushing 7 is in a horn structure, the large end of the tuning bushing 7 is close to the blind hole 10, an elastic clamping seat 9 is arranged on the through hole of the small end of the tuning bushing 7, four second split grooves 14 are arranged on the outer side of the circumference of the elastic clamping seat 9 in the axial direction and pass through the end portions of the elastic clamping seat 9, the four second split grooves 14 divide the elastic clamping seat 9 into a petal-shaped elastic structure, the front end of the load resistor 8 is connected with the elastic body 6 after entering the petal-shaped elastic structure on the blind hole 10, and is sequentially connected with the inner conductor 4 through the elastic body 6 and the inner conductor extension section 5, and the rear end of the load resistor 8 passes through the through hole of the small end of the tuning bushing 7 and is fixed in the petal-shaped elastic structure of the elastic clamping seat 9;

[0031] A tuning external thread 11 is arranged on the outer side of the circumference of the tuning bushing 7, and a tuning internal thread 12 which is matched with the tuning external thread 11 is arranged on the inner wall of the outer shell 1, as shown in the figure, Figure 4 Four notches 17 are uniformly arranged on the outer circumference of the small end of the tuning bushing 7, for cooperating with a screwdriver to adjust the relative position relationship between the tuning bushing 7 and the outer shell 1, the elastic body 6 in the utility model is an elastic spring, the position relationship between the tuning external thread 11 and the tuning internal thread 12 is changed by rotating the tuning bushing 7 with the screwdriver, so that the tuning bushing 7 drives the load resistor 8 to compress or release the elastic spring to change the phase relationship between the load resistor 8 and the outer shell 1, and then the phase of the radio frequency coaxial load is adjusted, so that the phases of the same batch or different batches of radio frequency loads remain the same phase difference, the precision of the voltage standing wave ratio performance index and the system performance index are improved.

[0032] An installation external thread 15 is arranged on the outer side of the circumference of the rear cover 3, an installation internal thread 16 which is matched with the installation external thread 15 is arranged on the inner wall of the outer shell 1, and the rear cover 3 is embeddedly installed in the outer shell 1 through the installation external thread 15.

Claims

1. An adjustable high-precision equal-phase load structure, comprising an outer shell (1) and an insulating medium (2), a load resistor tuning assembly, and a rear cover (3) coaxially arranged from front to back within the outer shell (1), wherein an inner conductor (4) is disposed within the insulating medium (2), characterized in that: The rear end of the inner conductor (4) is provided with an inner conductor extension section (5), the rear end of the inner conductor extension section (5) is provided with a blind hole (10), the inner conductor extension section (5) is provided with an elastic body (6), the other end of the elastic body (6) is located in the blind hole (10) and is connected with a load resistance tuning assembly; The load resistance tuning assembly comprises a tuning sleeve (7) and a load resistance (8) arranged in the tuning sleeve (7), the tuning sleeve (7) is a horn structure, the large end of the tuning sleeve (7) is close to the blind hole (10), the small end of the tuning sleeve (7) is provided with an elastic clamping seat (9), the front end of the load resistance (8) is inserted into the blind hole (10) and is connected with the elastic body (6), and the load resistance (8) is sequentially connected with the elastic body (6), the inner conductor extension section (5) and the inner conductor (4), and the rear end of the load resistance (8) passes through the through hole of the small end of the tuning sleeve (7) and is connected with the elastic clamping seat (9); The outer side of the tuning sleeve (7) is provided with a tuning external thread (11), the inner wall of the outer shell (1) is provided with a tuning internal thread (12) matched with the tuning external thread (11), the axial position relationship between the tuning external thread (11) and the tuning internal thread (12) is changed by rotating the tuning sleeve (7), and then the phase relationship between the load resistance (8) and the outer shell (1) is changed.

2. The adjustable high-precision equal-phase load structure according to claim 1, characterized in that: A plurality of first split grooves are arranged on the outer side of the blind hole (10) in the axial direction and pass through the end portions, the plurality of first split grooves divide the blind hole (10) into a petal-shaped elastic structure, and the front end of the load resistance (8) is connected with the blind hole (10) through the petal-shaped elastic structure.

3. The adjustable high-precision equal-phase load structure according to claim 2, characterized in that: The elastic body (6) is an elastic spring, which is used to compress or release the elastic spring by driving the load resistance (8) through the tuning sleeve (7), so that the load resistance (8) moves axially relative to the outer shell (1), thereby adjusting the phase of the radio frequency coaxial load.

4. The adjustable high-precision equal-phase load structure according to claim 3, characterized in that: The outer side of the inner conductor (4) is provided with a fixing device (13) in the middle, which is used to fix the inner conductor (4).

5. The adjustable high-precision equal-phase load structure according to claim 4, characterized in that: A plurality of second split grooves (14) are arranged on the outer side of the elastic clamping seat (9) in the axial direction and pass through the end portions, the plurality of second split grooves (14) divide the elastic clamping seat (9) into a petal-shaped elastic structure, and the rear end of the load resistance (8) is fixed in the elastic clamping seat (9) through the petal-shaped elastic structure.

6. The adjustable high-precision equal-phase load structure according to claim 5, characterized in that: The outer side of the rear cover (3) is provided with a mounting external thread (15), the inner wall of the outer shell (1) is provided with a mounting internal thread (16) matched with the mounting external thread (15), and the rear cover (3) is embeddedly installed in the outer shell (1) through cooperation of the mounting external thread (15) and the mounting internal thread (16).

7. The adjustable high-precision equal-phase load structure according to claim 6, characterized in that: A plurality of openings (17) are uniformly arranged on the outer periphery of the small end of the tuning bushing (7) for cooperating with a screwdriver to adjust the relative position relationship between the tuning bushing (7) and the outer shell (1).

8. The adjustable high-precision equal-phase load structure according to claim 7, characterized in that: A fixing shell (18) is arranged on the connecting end surface between the inner wall of the outer shell (1) and the dielectric medium (2) for keeping the stability of the dielectric medium (2) and the inner conductor (4).

9. The adjustable high-precision equal-phase load structure according to claim 8, characterized in that: A shielding ring (19) is arranged at the front end of the outer shell (1).

10. The adjustable high-precision equal-phase load structure according to claim 9, characterized in that: The blind hole (10) is a stepped hole, the elastic body (6) is arranged in the small hole of the stepped hole and protrudes out of the small hole, and the front end of the load resistor (8) is inserted into the large hole of the stepped hole and abuts against the elastic body (6).

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