Equiphase radio frequency coaxial load structure

Abstract

The utility model relates to a radio frequency coaxial load structure, and provides an equiphase radio frequency coaxial load structure in order to solve the technical problems of complex structure, large processing difficulty, poor phase consistency and the like of the existing radio frequency coaxial load structure, which comprises an outer shell, an insulating medium, an inner conductor, a load resistor tuning assembly and a rear cover, a first internal thread and a limiting boss are arranged on the inner wall of the outer shell; the load resistor tuning assembly comprises a tuning bushing and a load resistor arranged in the tuning bushing, the tuning bushing is of a flaring structure, the outer side of the large end of the tuning bushing is provided with a limiting groove matched with the limiting boss, and the outer side of the tuning bushing is provided with a first external thread matched with the first internal thread; a clamping seat is arranged at the small end of the tuning bushing, the front end of the load resistor is connected with the rear end of the inner conductor, the rear end of the load resistor penetrates through a through hole in the small end of the tuning bushing to be connected with the clamping seat, and the position relation between the load resistor tuning assembly and the outer shell and the position relation between the inner conductor and the outer shell can be changed through the clamping seat.

Description

TECHNICAL FIELD

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

[0002] Radio frequency coaxial load is one of important components of radio frequency transmission system, is widely used in radio equipment, electronic instrument and various microwave devices, its main use is in radio frequency system provides a stable, reliable, repeatable load, reduces signal leakage of empty port, mutual interference between systems through impedance matching to empty standby signal channel and test port, absorbs useless power in the system, avoids reflection and interference, ensures the stability and reliability of system, therefore, the performance of radio frequency coaxial load directly influences the comprehensive performance of whole system.

[0003] With the continuous development of wireless communication business, higher requirements are put forward to the volume, power resistance, electrical performance etc. of radio frequency coaxial load;In phased array radar system, phase influences the precision of performance index of whole system, and whether the phase of radio frequency coaxial load is consistent has greater influence on the precision of system performance index, how to ensure the phase consistency of radio frequency coaxial load is a major problem currently faced;In order to achieve good matching, the existing load structure often processes the inner wall of the shell containing resistance part into exponential or hyperbolic shape, resulting in complex structure, great processing difficulty, and tolerance accumulation seriously influences the electrical length of load, thus unable to meet the requirement of system signal to phase consistency.

[0004] Therefore, it is very necessary to design a load structure that can meet the requirement of system signal to phase consistency. INVENTION CONTENTS

[0005] The utility model aims at solving the technical problems of the complex structure, great processing difficulty of the existing radio frequency coaxial load structure, and the inability to meet the requirement of system signal to phase consistency, and proposes an equal phase radio frequency coaxial load structure.

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

[0007] An equal phase radio frequency coaxial load structure, comprising a shell body, an insulating medium, a load resistance tuning assembly and a rear cover are coaxially arranged on the inner wall of the shell body from front to back, and an inner conductor is coaxially arranged in the insulating medium, and the special feature is that:

[0008] A first internal thread for adapting and connecting with the load resistance tuning assembly is arranged on the inner wall of the shell body, and a limiting boss is arranged at the front end of the first internal thread.

[0009] The load resistance tuning assembly comprises a tuning bushing and a load resistance arranged in the tuning bushing, the tuning bushing is of a flared structure, a large end of the tuning bushing is located at a rear end of the insulating medium, an outer side of the large end of the tuning bushing is provided with a limiting groove matched with the limiting boss, and an outer side of the tuning bushing at a rear end of the limiting groove is provided with a first external thread matched with the first internal thread;

[0010] A clamping seat is arranged on a small end of the tuning bushing, a front end of the load resistance is connected with a rear end of the inner conductor, a rear end of the load resistance is connected with the clamping seat through a through hole of the small end of the tuning bushing, the position relationship between the first external thread and the first internal thread is changed by rotating the tuning bushing, and then the axial position relationship between the load resistance, the inner conductor and the outer shell body is changed, so that the phase is adjusted.

[0011] Further, a plurality of first split grooves penetrating through end portions of the clamping seat are axially arranged on an outer side of the clamping seat, and the clamping seat is divided into a petal-shaped elastic structure, and the rear end of the load resistance is fixed in the clamping seat through the petal-shaped elastic structure.

[0012] Further, a blind hole is arranged at the rear end of the inner conductor, a plurality of second split grooves penetrating through end portions of the blind hole are axially arranged on an outer side of the blind hole, and the blind hole is divided into a petal-shaped elastic structure, and the front end of the load resistance is fixed in the blind hole at the rear end of the inner conductor through the petal-shaped elastic structure.

[0013] Further, a second internal thread is arranged on an inner wall at the rear end of the outer shell body, and a second external thread matched with the second internal thread is arranged on an outer side of the rear cover, and the second internal thread and the second external thread are matched to embed the rear cover and fixedly arrange the rear cover at the rear end of the outer shell body.

[0014] Further, an elastic sealing structure is arranged on an outer side of the rear cover, and the rear cover is embedded and arranged at the rear end of the outer shell body through the elastic sealing structure.

[0015] Further, a plurality of notches are uniformly arranged on an outer circumference of the small end of the tuning bushing, the position relationship between the first external thread and the first internal thread is changed by cooperating with a screwdriver, and then the relative position relationship between the tuning bushing and the outer shell body is changed.

[0016] Further, the number of the first split grooves and the second split grooves on the clamping seat and the blind hole is four.

[0017] Further, four notches are uniformly arranged on the outer circumference of the small end of the tuning bushing.

[0018] Further, the limiting boss is a bevel boss structure.

[0019] The utility model discloses the beneficial effect:

[0020] The equal-phase radio frequency coaxial load structure has low manufacturing cost, simple structure, is easy to install and adjust, has high structural reliability, can be applicable to the adjustment of different radio frequency loads, greatly improves the practicability and applicability of the structure, fixes and adjusts the load resistance through the tuning bushing, reduces installation error, effectively ensures the phase consistency of the radio frequency load, makes the phases of the same batch or different batches of radio frequency loads keep a certain phase difference, meets the requirement of system signal on phase consistency, and improves system performance index precision.

[0021] The equal-phase radio frequency coaxial load structure has low manufacturing cost, simple structure, is easy to install and adjust, has high structural reliability, can be applicable to the adjustment of different radio frequency loads, greatly improves the practicability and applicability of the structure, fixes and adjusts the load resistance through the tuning bushing, reduces installation error, effectively ensures the phase consistency of the radio frequency load, makes the phases of the same batch or different batches of radio frequency loads keep a certain phase difference, meets the requirement of system signal on phase consistency, and improves system performance index precision.

[0022] The equal-phase radio frequency coaxial load structure has low manufacturing cost, simple structure, is easy to install and adjust, has high structural reliability, can be applicable to the adjustment of different radio frequency loads, greatly improves the practicability and applicability of the structure, fixes and adjusts the load resistance through the tuning bushing, reduces installation error, effectively ensures the phase consistency of the radio frequency load, makes the phases of the same batch or different batches of radio frequency loads keep a certain phase difference, meets the requirement of system signal on phase consistency, and improves system performance index precision.

[0023] The equal-phase radio frequency coaxial load structure has low manufacturing cost, simple structure, is easy to install and adjust, has high structural reliability, can be applicable to the adjustment of different radio frequency loads, greatly improves the practicability and applicability of the structure, fixes and adjusts the load resistance through the tuning bushing, reduces installation error, effectively ensures the phase consistency of the radio frequency load, makes the phases of the same batch or different batches of radio frequency loads keep a certain phase difference, meets the requirement of system signal on phase consistency, and improves system performance index precision. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structure schematic view of the equal-phase radio frequency coaxial load structure; Figure 2 It is a structure schematic view of the equal-phase radio frequency coaxial load structure; Figure 3 It is a structure schematic view of the equal-phase radio frequency coaxial load structure; Figure 4 It is a structure schematic view of the equal-phase radio frequency coaxial load structure;

[0025] REFERENCE SIGNS:

[0026] 1-outer shell, 2-insulating medium, 3-back cover, 4-inner conductor, 5-first inner thread, 6-limiting boss, 7-tuning bushing, 8-load resistance, 9-limiting groove, 10-first outer thread, 11-clamping seat, 12-first split groove, 13-second split groove, 14-blind hole, 15-second inner thread, 16-second outer thread, 17-aperture. DETAILED DESCRIPTION

[0027] As shown in Figure 1 , an equal-phase radio frequency coaxial load structure, comprising an outer shell 1, an inner wall of the outer shell 1 coaxially disposed from front to back with an insulating medium 2, a load resistance tuning assembly and a rear cover 3, the insulating medium 2 coaxially disposed with an inner conductor 4, the inner wall of the outer shell 1 is provided with a first internal thread 5 for adaptive connection with the load resistance tuning assembly, the front end of the first internal thread 5 is provided with a limiting boss 6; the inner wall of the rear end of the outer shell 1 is provided with a second internal thread 15, the outer side of the rear cover 3 is provided with a second external thread 16 matched with the second internal thread 15, the second internal thread 15 and the second external thread 16 are matched with each other to embed the rear cover 3 in the rear end of the outer shell 1.

[0028] As shown in Figure 2 , the load resistance tuning assembly comprises a tuning bushing 7 and a load resistance 8 disposed in the tuning bushing 7, the tuning bushing 7 is of a flared structure, the large end of which is located at the rear end of the insulating medium 2, the outer side of the large end of the tuning bushing 7 is provided with a limiting groove 9 matched with the limiting boss 6, the outer side of the tuning bushing 7 at the rear end of the limiting groove 9 is provided with a first external thread 10 matched with the first internal thread 5;

[0029] The small end of the tuning bushing 7 is provided with a clamping seat 11, as shown in Figure 3 , the outer side of the clamping seat 11 is axially provided with four first split grooves 12 penetrating the end thereof, the four first split grooves 12 divide the clamping seat 11 into a petal-shaped elastic structure, the rear end of the load resistance 8 is fixed in the clamping seat 11 through the petal-shaped elastic structure,

[0030] The rear end of the inner conductor 4 is provided with a blind hole 14, the outer side of the blind hole 14 is axially provided with four second split grooves 13, the four second split grooves 13 divide the blind hole 14 into a petal-shaped elastic structure, the front end of the load resistance 8 is fixed in the blind hole 14 at the rear end of the inner conductor 4 through the petal-shaped elastic structure; the outer circumference of the small end of the tuning bushing 7 is uniformly provided with four notches 17, the four notches 17 are used to cooperate with a screwdriver to adjust the tuning bushing 7, the position relationship between the first external thread 10 and the first internal thread 5 is changed through the tuning bushing 7, thereby changing the position relationship between the load resistance 8 and the outer shell 1, the change range of the mechanical length Δ generated by changing the position relationship between the load resistance and the outer shell through the tuning bushing 7 is shown in Figure 4 , which can be applied to phase adjustment of various types of radio frequency loads, expanding the application range and adjustment range of the structure, and ensuring effective adjustment of the load resistance.

Claims

1. An equal-phase radio frequency coaxial load structure, comprising an outer shell (1), an insulating medium (2), a load resistance tuning assembly and a rear cover (3) are coaxially arranged in sequence from front to back on the inner wall of the outer shell (1), and an inner conductor (4) is coaxially arranged in the insulating medium (2), characterized in that: a first internal thread (5) is arranged on the inner wall of the outer shell (1) for adaptive connection with the load resistance tuning assembly, and a limiting boss (6) is arranged at the front end of the first internal thread (5); the load resistance tuning assembly comprises a tuning bushing (7) and a load resistance (8) arranged in the tuning bushing (7), the tuning bushing (7) is of a flared structure, the large end of the tuning bushing (7) is located at the rear end of the insulating medium (2), the outer side of the large end of the tuning bushing (7) is provided with a limiting groove (9) matched with the limiting boss (6), and the outer side of the tuning bushing (7) at the rear end of the limiting groove (9) is provided with a first external thread (10) matched with the first internal thread (5); a clamping seat (11) is arranged on the small end of the tuning bushing (7), the front end of the load resistance (8) is connected with the rear end of the inner conductor (4), the rear end of the load resistance (8) is connected with the clamping seat (11) through the through hole of the small end of the tuning bushing (7), the positional relationship between the first external thread (10) and the first internal thread (5) is changed by rotating the tuning bushing (7), and then the axial positional relationship between the load resistance (8) and the inner conductor (4) and the outer shell (1) is changed, so as to adjust the phase.

2. The equal-phase radio frequency coaxial load structure according to claim 1, characterized in that: a plurality of first split grooves (12) penetrating the end portions are axially arranged on the outer side of the clamping seat (11), the plurality of first split grooves (12) divide the clamping seat (11) into a petal-shaped elastic structure, and the rear end of the load resistance (8) is fixed in the clamping seat (11) through the petal-shaped elastic structure.

3. The equal-phase radio frequency coaxial load structure according to claim 2, characterized in that: a blind hole (14) is arranged at the rear end of the inner conductor (4), a plurality of second split grooves (13) penetrating the end portions are axially arranged on the outer side of the blind hole (14), the plurality of second split grooves (13) divide the blind hole (14) into a petal-shaped elastic structure, and the front end of the load resistance (8) is fixed in the blind hole (14) at the rear end of the inner conductor (4) through the petal-shaped elastic structure.

4. The equal-phase radio frequency coaxial load structure according to claim 3, characterized in that: a second internal thread (15) is arranged on the inner wall of the rear end of the outer shell (1), and a second external thread (16) matched with the second internal thread (15) is arranged on the outer side of the rear cover (3), the second internal thread (15) and the second external thread (16) are matched with each other to embed the rear cover (3) in the rear end of the outer shell (1).

5. The equal-phase radio frequency coaxial load structure according to claim 3, characterized in that: an elastic sealing structure is arranged on the outer side of the rear cover (3), and the rear cover (3) is embedded and installed in the rear end of the outer shell (1) through the elastic sealing structure. ​ ​ ​ ​ ​ ​ ​ 6. The equal-phase radio frequency coaxial load structure according to claim 4 or 5, characterized in that: The outer circumference of the small end of the tuning bushing (7) is also uniformly provided with a plurality of openings (17) for cooperating with a screwdriver to change the positional relationship between the first external thread (10) and the first internal thread (5), thereby changing the relative positional relationship between the tuning bushing (7) and the outer shell (1).

7. The equal-phase radio frequency coaxial load structure according to claim 6, characterized in that: The number of the first split groove (12) and the second split groove (13) on the clamping seat (11) and the blind hole (14) is 4.

8. The equal-phase radio frequency coaxial load structure according to claim 7, characterized in that: The outer circumference of the small end of the tuning bushing (7) is uniformly provided with 4 openings (17).

9. The equal-phase radio frequency coaxial load structure according to claim 8, characterized in that: The limiting boss (6) is a beveled boss structure.

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