CN203644918U - SMA connector - Google Patents

Abstract

The utility model relates to an SMA connector and belongs to the technical field of socket connectors. The SMA connector comprises an inner conductor, a housing, and an insulator positioned between the inner conductor and the housing. The insulator is a circular ring which is axially provided with through holes. According to the SMA connector, with the adoption of through holes disposed in the insulator, the dielectric constant of a medium is a mixture of a dielectric constant of the air and a dielectric constant of polytetrafluoroethylene, and the dielectric constant of polytetrafluoroethylene is 2.1 while the dielectric constant of the air is 1, and after the mixing, the dielectric constant is 1.5; with the adoption of the mixed media, the SMA connector not only satisfies an aim of effective support of the media but also reduces the outer diameter and the dielectric constant of the media, thereby achieving the beneficial effect of improving the workable frequency. Preferably, six through holes are circumferentially uniformly distributed in the insulator. According to tests, the workable frequency of the SMA connector can go up to 18,500 MHz, and the sanding wave of the SMA connector is smaller than 1.25 (DC-18,000 MHz).

Description

SMA connector

Technical field

The utility model belongs to connector art field, relates in particular to a kind of SMA connector.

Background technology

In microwave communication, lightning arrester technical field, SMA connector is a kind of widely used small-sized coaxial connector being threaded, it has the advantages that bandwidth, performance are excellent, highly reliable and the life-span is long.SMA connector is applicable to be connected radio frequency cable or microstrip line in the loop of rf of microwave equipment and digital communication system.The frequency of utilization of SMA connector is lower generally at DC-13000MHz, and this is due to the restriction of connector TEM mould upper limit operating frequency.

Along with communication instructions for use improves constantly, client is also improving the requirement of SMA connector frequency of utilization.

Utility model content

For the deficiencies in the prior art, technical problem to be solved in the utility model is, provide a kind of improved can frequency of utilization SMA connector.

The technical solution adopted in the utility model is, a kind of SMA connector comprises inner wire, shell and the insulator between inner wire, shell, and described insulator is torus, and has through hole along its axial direction on torus.

The utility model SMA connector, takes to offer through hole on insulator, and medium dielectric constant is that air mixes with polytetrafluoroethylene, polytetrafluoroethylene dielectric constant=2.1; Dielectric constant of air is 1, and dielectric constant=1.5 after mixing, adopt blending agent, have both met the object that medium effectively supports, and have reduced again medium external diameter and dielectric constant, thereby reaches the beneficial effect that raising can frequency of utilization.

Brief description of the drawings

Fig. 1 is the utility model SMA connector cross-sectional view;

Fig. 2 is the utility model SMA connector insulator schematic cross-section.

Embodiment

Below in conjunction with accompanying drawing, the utility model is made and being further illustrated.

As shown in the figure, the utility model SMA connector comprises shell 1, insulator 2 and inner wire 4, insulator is between inner wire, shell, insulator is torus, and has through hole 3 along its axial direction on torus, as preferably, number of openings is six, on insulator, make circumference uniform distribution, medium dielectric constant is that air mixes with polytetrafluoroethylene, polytetrafluoroethylene dielectric constant=2.1; Dielectric constant of air is 1, and dielectric constant=1.5 after mixing, adopt blending agent, have both met the object that medium effectively supports, and have reduced again medium external diameter and dielectric constant, thereby reaches the beneficial effect that raising can frequency of utilization.

The connector of perfect condition can be defined as to the desirable air line in one end in theory, only be made up of outer conductor and inner wire, medium is vacuum.Internal and external conductor is desirable conductor, and conductivity is ∴ γ=∞; Medium is desirable medium, i.e. ρ=∞.

The frequency of its minimum high-rder mode TE11 is: f=190.8/{ medium dielectric is normal/(d+D) } GHz

Common SMA connector: SMA connector after insulator inner diameter d=1.27mm improves: insulator inner diameter d=1.5mm

Insulator outer diameter D=4.1mm insulator outer diameter D=4.0mm

Medium dielectric constant=1.5, medium dielectric constant=2.1

Theoretical vacuum is without medium upper limit operating frequency f=190.8/{ medium dielectric constant (d+D) } GHz

Can effectively SC service ceiling operating frequency=80%* theoretical vacuum without medium upper limit operating frequency f.

The utility model SMA connector, after tested can frequency of utilization to 18500MHz; Standing wave: be less than 1.25 (DC-18000MHz).

The description of above embodiment is comparatively concrete, detailed; but can not therefore be interpreted as the restriction to this patent scope; it should be noted that; for the person of ordinary skill of the art; without departing from the concept of the premise utility; can also make some distortion and improvement, these all belong to protection range of the present utility model.

Claims (2)

1. a SMA connector, comprises inner wire, shell and the insulator between inner wire, shell, it is characterized in that: described insulator is torus, and have through hole along its axial direction on torus.

2. SMA connector according to claim 1, is characterized in that: described number of openings is six, makes circumference uniform distribution on insulator.

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