CN212659967U

CN212659967U - Radio frequency surge protector

Info

Publication number: CN212659967U
Application number: CN202021727052.6U
Authority: CN
Inventors: 陈小东
Original assignee: Chengdu Leian Co ltd
Current assignee: Chengdu Leian Co ltd
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2021-03-05
Anticipated expiration: 2030-08-18

Abstract

The utility model discloses a radio frequency surge protector, which comprises an input coaxial connector and an output coaxial connector, an inner conductor blocking capacitor arranged between the input coaxial connector and the output coaxial connector, a first lightning protection element with one end connected between the input coaxial connector and the inner conductor blocking capacitor and the other end grounded, and a second lightning protection element and an outer conductor blocking capacitor with one end connected between the inner conductor blocking capacitor and the output coaxial connector and the other end grounded after series connection; and the shell of the output coaxial connector is connected between the second lightning protection element and the outer conductor blocking capacitor, and the shell of the input coaxial connector is grounded. By the proposal, the utility model has the advantages of simple structure, connect reliably, lightning protection is respond well, have very high practical value and spreading value in radio frequency lightning protection technical field.

Description

Radio frequency surge protector

Technical Field

The utility model belongs to the technical field of the radio frequency lightning protection technique and specifically relates to a radio frequency surge protector.

Background

The radio frequency surge protector is an indispensable part of modern communication and is mainly used for receiving and transmitting equipment and a protector for transmitting feeder line surge. At present, the protection widely adopted by the radio frequency lightning protector in the prior art is to connect a protection device in parallel between an inner conductor and an outer conductor, the inner conductor is conducted with the inner conductor, the outer conductor is also conducted, and the surge protector can play a lightning protection role in occasions with low requirements. When some special occasions need to isolate the input and the output with direct current and low frequency, the traditional radio frequency lightning protector can not realize the function.

Therefore, there is an urgent need to provide a radio frequency surge protector which has reliable performance, can realize direct current or low frequency isolation, and can prevent inductive thunder and surge.

SUMMERY OF THE UTILITY MODEL

To the above problem, an object of the utility model is to provide a radio frequency surge protector, the utility model discloses a technical scheme as follows:

a radio frequency surge protector comprises an input coaxial connector, an output coaxial connector, an inner conductor blocking capacitor arranged between the input coaxial connector and the output coaxial connector, a first lightning protection element, a second lightning protection element and an outer conductor blocking capacitor, wherein one end of the first lightning protection element is connected between the input coaxial connector and the inner conductor blocking capacitor, and the other end of the first lightning protection element is grounded; and the shell of the output coaxial connector is connected between the second lightning protection element and the outer conductor blocking capacitor, and the shell of the input coaxial connector is grounded.

Preferably, the input coaxial connector and the output coaxial connector have a resistance value of 50 Ω or 75 Ω.

Further, the first lightning protection element and the second lightning protection element are gas discharge tubes or inductors.

The gas discharge tube adopts different direct current breakdown voltages as voltage grade and capacitance capacity devices according to different radio frequency signal powers and frequencies, one end electrode of the discharge tube is connected with the inner conductor, and the other end electrode of the discharge tube is connected with the outer conductor of the outer conductor DC blocking capacitor; the inductor adopts enamelled wires with different diameters according to lightning through-flow requirements, and is wound into the inductor with corresponding turns according to different frequencies of the used frequency band.

Further, the inner conductor DC blocking capacitor comprises a first rod body and a first hole which are in a shaft type structure; the surface of the first rod body is wrapped with a first insulating film with the thickness of less than 2 mm.

Further, the outer conductor DC blocking capacitor comprises a second hole and a second rod body which are in a shaft type structure, and a layer of second insulating film smaller than 2mm is wrapped on the surface of the second rod body.

Furthermore, the outer conductor blocking capacitor is an annular fixed capacitor.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses set up lightning protection component, inner conductor blocking electric capacity, outer conductor blocking electric capacity ingeniously, it has lightning protection and blocking effect, has carried out the emulation to this principle, and the emulation result is very big to low frequency decay, and is less to the high frequency signal loss, has realized the effect of keeping apart direct current and low frequency. The utility model discloses a both ends mouth protects respectively, and arbitrary port can all regard as the surge end, with surge end outer conductor ground connection can, it is very convenient to use. To sum up, the utility model has the advantages of simple structure, connect reliably, lightning protection is respond well, have very high practical value and spreading value in radio frequency lightning protection technical field.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as a limitation of the scope of protection, and for those skilled in the art, other related drawings may be obtained from these drawings without inventive effort.

Fig. 1 is a schematic diagram (a) of the present invention.

Fig. 2 is a schematic diagram (ii) of the present invention.

Fig. 3 is a schematic structural diagram (a) of the present invention.

Fig. 4 is a schematic structural diagram (ii) of the present invention.

Fig. 5 is a simulation graph of S21 according to the present invention.

In the drawings, the names of the parts corresponding to the reference numerals are as follows:

1. an input coaxial connector; 2. a first lightning protection element; 3. an inner conductor blocking capacitor; 4. an outer conductor blocking capacitor; 5. a second lightning protection element; 6. an output coaxial connector; 7. a first rod; 8. a first hole; 9. a second rod; 10. a second hole; 11. a first insulating film; 12. a second insulating film; 13. a third insulating film; 14. a capacitor is fixed in a ring shape.

Detailed Description

To make the objectives, technical solutions and advantages of the present application more clear, the present invention will be further described with reference to the accompanying drawings and examples, and embodiments of the present invention include, but are not limited to, the following examples. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Examples

As shown in fig. 1 to fig. 3, the present embodiment provides a radio frequency surge protector, which includes an input coaxial connector, an output coaxial connector, a lightning protection element, an inner conductor dc blocking capacitor, and an outer conductor dc blocking capacitor. The connector is used for being electrically connected with equipment, the lightning protection element is used for protecting induced lightning current, and the inner conductor blocking capacitor and the outer conductor blocking capacitor are used for isolating direct current or low-frequency interference. The outer conductors of the input connector and the output connector are connected through an inner conductor blocking capacitor, and the outer conductors of the input connector and the output connector are connected through an outer conductor blocking capacitor.

The connector of this embodiment is used for the electric connection with equipment, and lightning protection component is used for the protection of response lightning current, and inner conductor blocking capacitor, outer conductor blocking capacitor are used for direct current or low frequency interference's isolation, and inner and outer conductor blocking capacitor is to the signal of frequency f, and the capacitive reactance that presents is:

therefore, the capacitance of the blocking capacitor to direct current and low-frequency interference is large, and the capacitance to radio-frequency signals with high frequency is small.

The lightning protection element of the embodiment is a gas discharge tube or an inductor, wherein the gas discharge tube adopts a direct current breakdown voltage of 75V-3000V voltage level according to different radio frequency signal power and frequency, a capacitor is less than 2pF devices, one end electrode is connected with an inner conductor, and the other end electrode is connected with an outer conductor; the inductance adopts an enameled wire with the diameter larger than 0.5mm, the enameled wire is wound on an inductance winding rod with the diameter larger than 1mm, 1-30 turns of inductance are wound according to different frequencies, insulating layers of pins at two ends of the inductance are removed, one end of the inductance is connected with an inner conductor, and the other end of the inductance is connected with an outer conductor of an outer conductor DC blocking capacitor.

The lightning protection component can be combined according to different requirements, and the combination mode is as follows: the first lightning protection element is a discharge tube, and the second lightning protection element is a discharge tube (as shown in figure 1); the first lightning protection element is an inductor, and the second lightning protection element is a discharge tube (as shown in fig. 2); the first lightning protection element is an inductor, and the second lightning protection element is an inductor; the first lightning protection element is a discharge tube, and the second lightning protection element is an inductor.

In this embodiment, the inner conductor isolation capacitor has two shaft-type structures which can be matched with each other, wherein one is a first hole 8, the other is a first rod 7, and the first rod 7 is wrapped by a first insulating film 11 with a thickness less than 2mm to serve as a capacitor medium. In addition, the outer conductor isolation capacitor adopts two matched shaft-type structures, one of which is a second hole 10, the other is a second rod body 9, and a second insulating film 12 with the thickness less than 2mm is wrapped on the rod to serve as a capacitor medium. While at the same time the two outer conductor end faces are insulated with a third insulating film 13 of more than 1 mm. The outer conductor isolation capacitance may also be an annular fixed capacitor 14.

The above-mentioned embodiments are merely preferred embodiments of the present invention, and are not limitations on the protection scope of the present invention, but all the changes made by adopting the design principle of the present invention and performing non-creative work on this basis shall fall within the protection scope of the present invention.

Claims

1. A radio frequency surge protector is characterized by comprising an input coaxial connector (1), an output coaxial connector (6), an inner conductor blocking capacitor (3) arranged between the input coaxial connector (1) and the output coaxial connector (6), a first lightning protection element (2) with one end connected between the input coaxial connector (1) and the inner conductor blocking capacitor (3) and the other end grounded, and a second lightning protection element (5) and an outer conductor blocking capacitor (4) with one end connected between the inner conductor blocking capacitor (3) and the output coaxial connector (6) and the other end grounded after being connected in series; and the shell of the output coaxial connector (6) is connected between the second lightning protection element (5) and the outer conductor blocking capacitor (4), and the shell of the input coaxial connector (1) is grounded.

2. A radio frequency surge protector according to claim 1, characterized in that the input coaxial connector (1) and the output coaxial connector (6) have a resistance value of 50 Ω or 75 Ω.

3. A radio frequency surge protector according to claim 1, characterized in that the first (2) and second (5) lightning protection elements are gas discharge tubes or inductors.

4. A radio frequency surge protector according to claim 1, characterized in that the inner conductor dc-blocking capacitor (3) comprises a first rod (7) and a first hole (8) in a shaft-like structure; the surface of the first rod body (7) is wrapped with a first insulating film (11) with the thickness less than 2 mm.

5. A radio frequency surge protector according to claim 1, wherein the outer conductor dc blocking capacitor (4) comprises a second hole (10) and a second rod (9) in a shaft-type configuration, and the surface of the second rod (9) is covered with a second insulating film (12) of less than 2 mm.

6. A radio frequency surge protector according to claim 1, characterized in that the outer conductor blocking capacitor (4) is an annular fixed capacitor (14).