RU2597868C1 - Dust-proof dielectric washer - Google Patents

Abstract

FIELD: electronics.

SUBSTANCE: invention relates to microwave engineering, specifically to elements of microwave coaxial transmission line, and can be used in coaxial connectors. In dielectric washer with central through hole 1 on both sides of washer there are circular grooves 2. On both sides of washer there are least three pairs of blind longitudinal holes. First and last holes 3, 4 are made from different sides of washer, and other holes 5 are made so that they form partition wall 6.

EFFECT: technical result is obtaining a constant value of effective dielectric constant along entire length of washer.

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Description

FIELD OF THE INVENTION

The invention relates to the field of microwave technology, in particular to elements of a microwave coaxial path, and can be used in coaxial connectors.

State of the art

The main purpose of the dielectric washer (insulator) is to fix the central conductor relative to the external, mechanical isolation between the central conductors of the connectors and the central conductors of the microwave devices (to prevent the transmission of the forces arising from the joint of the connectors into the device), protection from dust and other small impurities inside the devices Microwave

At the same time, the dielectric washer should introduce minimal loss and mismatch in the coaxial microwave path.

Known dielectric washer (patent US 20120001032, IPC F16L 3/22, publ. 05.01.2012), in which there is a through central hole and several through transverse holes, ring grooves are made on both sides of the washer.

The disadvantage of this dielectric washer is the uneven distribution of the dielectric along the length of the washer. This leads to an uneven distribution of the effective dielectric constant of the washer along the length and, as a result, to a deterioration in the electrical characteristics of the washer.

Known dielectric washer (patent RU 124059U1, IPC H01R 13/646, publ. 10.01.2013), in which there is a through central hole and several longitudinal through or blind holes, ring grooves are made on both sides of the washer.

The disadvantages of this dielectric washer are:

1) if the longitudinal holes are through, then the washer is not dustproof;

2) if the longitudinal holes are blind, this leads to an uneven distribution of the dielectric along the length of the washer and, as a consequence, to an uneven distribution of the effective dielectric constant of the washer along the length, which impairs the electrical characteristics of the washer, as well as low mechanical strength;

3) A microwave device with a washer pressed into the ring and pressed onto the center conductor is less maintainable.

Disclosure of invention

The main task solved by the claimed invention is the creation of a dustproof dielectric washer, which allows to improve the electrical and mechanical characteristics, as well as to improve the manufacturability and maintainability of microwave devices, which include this washer.

The technical result achieved using the proposed solution is to obtain a constant value of the effective dielectric constant along the entire length of the washer.

The technical result is achieved due to the fact that in a dustproof dielectric washer with a through central hole, on both sides of which are made circular grooves and longitudinal holes equidistant from the center, according to the proposed solution, at least three pairs of blind longitudinal holes are made on both sides of the washer, while the first and last holes are located on opposite sides of the washer, the other holes are arranged in pairs on the same axis, forming disjoint partitions, while the depth tversty calculated as follows:

where: S ₁ (n) is the depth of the hole on one side of the washer;

S ₂ (n) is the depth of the hole on the other side of the washer;

l is the length of the dielectric washer;

p is the depth of the annular groove;

n is the serial number of the hole;

N is the number of holes.

It is advisable that the bottom of the blind holes be conical.

In addition, it is advisable to make the bottom of the blind holes flat.

Due to the uniform distribution of the dielectric along the length of the washer, in each of its sections there will be a constant value of the effective dielectric constant, which ensures constant wave resistance in this section and, as a result, minimal path mismatch.

Brief Description of the Drawings

In FIG. 1 shows a general view of the dielectric washer; FIG. 2 is a plan view of FIG. 3 is a section AA, in FIG. 4 - section BB, in FIG. 5 is a section bb, in FIG. 6 shows the arrangement of blind holes; FIG. 7 shows a dielectric washer pressed into a metal ring and pressed onto a metal sleeve; FIG. 8 is a section GG, in FIG. Figure 9 shows a graph of the VSWR versus the coaxial transition frequency in the 3.5 mm path with a dustproof dielectric washer.

The implementation of the invention

The dielectric washer is made with a through central hole 1, ring grooves are located on both sides of the washer 2. The first hole 3 is made on one side of the washer, and the last hole 4 is on the other side of the washer. The remaining holes 5 are made in such a way that they form partitions between themselves 6. The dielectric washer is pressed into the metal ring 7 on the outer diameter, and pressed onto the metal sleeve 8 along the inside.

The assembly module, which is a dielectric washer, pressed into a metal ring and pressed onto a metal sleeve, is put on the central conductor and installed in the connector housing.

When using the proposed solution in microwave devices, maintainability is significantly increased, as well as the manufacturability of the assembly process is improved and the cost of the microwave device as a whole is reduced.

Claims (3)

1. A dustproof dielectric washer with a through central hole, on both sides of which there are annular grooves and longitudinal holes equidistant from the center, characterized in that at least three pairs of blind longitudinal holes are made on both sides of the washer, the first and last holes being located with opposite sides of the washer, and other holes are arranged in pairs on the same axis, forming disjoint partitions, while the depth of the holes is calculated by the formulas:

where: S ₁ (n) is the depth of the hole on one side of the washer;
S ₂ (n) is the depth of the hole on the other side of the washer;
l is the length of the dielectric washer;
p is the depth of the annular groove;
n is the serial number of the hole;
N is the number of holes. 2. A dustproof dielectric washer according to claim 1, characterized in that the bottom of the blind holes is made conical. 3. A dustproof dielectric washer according to claim 1, characterized in that the bottom of the blind holes is made flat.

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