CN107196158A - A kind of float type blindmate radio frequency (RF) coaxial connector of constant impedance - Google Patents

Abstract

The invention relates to a floating type blind-mating radio frequency coaxial connector with constant impedance, which belongs to the technical field of connectors and includes a jack contact and a pin contact; the jack contact includes an inner conductor of the jack, an outer conductor of the jack Conductors and jack insulators; pin contacts include pin inner conductors, pin outer conductors, pin intermediate conductors and pin insulators; jack inner conductors are provided with pin accommodation chambers and slotted ends, pin inner conductors An extended contact pin that can be contacted and matched with the pin accommodation cavity is set in the middle conductor, and a protruding socket part that can be elastically interfering with the outer conductor of the jack is set in the middle conductor of the pin to ensure that the coaxial connector Both the inner and outer conductors can maintain a certain contact pressure during the insertion process, so that a stable impedance can be formed between the inner and outer conductors, which can effectively improve the high-frequency electrical stability of the floating blind mating RF connector. The invention has the advantages of blind insertion, stable electrical performance, good efficiency and the like.

Description

A Floating Blind-mating RF Coaxial Connector with Constant Impedance

technical field

The invention belongs to the technical field of connectors, in particular to a floating blind-mating radio frequency coaxial connector with constant impedance.

Background technique

RF coaxial connectors are usually signal transmission components installed on cables or instruments, and are indispensable key components of coaxial transmission systems. RF coaxial connectors are usually divided into threaded, bayonet, push-in, floating blind mating and other types. With the rise of mobile Internet big data and the Internet of Things, there is an increasing demand for floating blind mating RF coaxial connectors in the market. The contacts in rectangular connectors and circular connectors with mixed high and low frequencies require It has a certain radial and axial floating to realize the blind mating function.

According to the skin effect, radio frequency energy is always transmitted on the surface between the conductors. The characteristic impedance of the radio frequency coaxial connector is determined by the ratio of the diameter of the outer conductor to the inner conductor and the dielectric constant of the insulating medium between the two conductors. When the entire When the characteristic impedance of the system is matched, its signal transmission efficiency is the highest. Normally designed RF coaxial connectors, the inner diameter of the outer conductor and the outer diameter of the inner conductor are stable and conform to the optimal size of RF radio frequency transmission.

However, in the actual application process of this kind of RF coaxial connector, especially in the RF coaxial connector with cluster or blind plug structure, due to the reserved tolerance of the design and the comprehensive error of the system, the inner and outer conductors in the RF coaxial connector During the mating process, there will be a transition gap between the plugs, and it is difficult for the inner and outer conductors to be in contact with each other at the same time, resulting in discontinuous signal transmission. Discontinuous impedance is likely to appear during signal transmission, and the RF signal is greatly reflected here, resulting in resident Wave performance is poor. Especially in the millimeter wave frequency band, the change is more severe, which affects the stability of electrical performance.

Contents of the invention

In view of the above problems, the present invention provides a floating blind mating radio frequency coaxial connector with constant impedance. During the mating process, the impedance formed between the conductors of the radio frequency coaxial connector can be kept consistent without large fluctuations .

(1) Technical solution

The present invention provides a floating type blind-mating RF coaxial connector with constant impedance, which includes a jack contact and a pin contact, and the jack contact includes: a jack inner conductor, a jack outer conductor and a jack Insulator, the socket insulator is arranged between the socket inner conductor and the socket outer conductor; the pin contact includes: pin inner conductor, pin outer conductor, pin intermediate conductor and pin an insulator, the inner conductor of the pin and the middle conductor of the pin are sleeved inside the outer conductor of the pin, and the insulator of the pin is arranged between the inner conductor of the pin and the middle conductor of the pin;

The outer conductor of the jack is provided with a butt jack and a cavity capable of accommodating the front end of the inner conductor of the jack; the entrance end of the butt jack is provided with a first chamfer, and the jack of the outer conductor of the jack is A second chamfer is provided on the datum plane;

The inner conductor of the socket is provided with a pin accommodation cavity and a slotted closing opening, and the insertion end of the pin accommodation cavity is provided with a third chamfer;

The front end of the inner conductor of the pin is provided with a contact pin that can be inserted into the pin accommodation cavity of the inner conductor of the jack, and the head of the contact pin is provided with a contact pin chamfer;

The outer conductor of the pin is provided with a contact inner cavity capable of receiving and inserting the front end of the outer conductor of the socket, and the insertion end of the contact inner cavity is provided with an inner cavity insertion chamfer;

The intermediate conductor of the pin is provided with a protruding socket part and a pin positioning end surface that can be matched with the butt socket, and the depth of the butt socket hole is greater than the length of the protruding socket part, and the socket Finally, the socket reference surface of the socket outer conductor is in close contact with the pin positioning end surface, and the protruding socket part is provided with a slot and an elastic contact ring, and the front end of the elastic contact ring is provided with a contact ring. horn.

A first gap is provided between the front end surface of the socket inner conductor and the cavity end surface of the socket outer conductor.

The size of the first gap is 1/8 of the cavity diameter of the socket outer conductor.

A second gap is provided between the rear end surface of the contact pin and the front end surface of the protruding socket part.

The length of the contact pins is smaller than the depth of the pin accommodating cavity.

(2) Beneficial effect

Compared with prior art, the beneficial effect of the present invention is:

1. By setting the socket inner conductor with the pin accommodation chamber and the slotted opening in the socket contact piece, the extended contact pin that can be contacted and matched with the pin accommodation chamber is provided in the pin contact piece, and at the same time The pin contact is provided with a protruding socket part that can elastically interfere with the butt socket in the socket contact to ensure that the inner and outer conductors of the coaxial connector can maintain a certain contact pressure during the insertion process at the same time, so that the plug A stable impedance can be formed between the inner and outer conductors of the hole contact and the pin contact, which can effectively improve the high-frequency electrical stability of the floating blind mating RF connector;

2. Corresponding chamfers are set in the inner and outer conductors of the jack contact and the pin contact, allowing radial deviation during the insertion process, that is, radial floating insertion can be realized;

3. The present invention has been verified by practical application on two types of connectors, RMMP and SMMP, and can well meet the requirements of GJB599A, and has stable electrical performance, and can maintain good electrical performance even in the millimeter wave frequency band.

Description of drawings

The present invention will be further described below in conjunction with drawings and embodiments. in:

Fig. 1 is a schematic diagram of the structure when the socket contact and the pin contact are separated in the floating blind-mating RF coaxial connector with constant impedance of the present invention;

Fig. 2 is a structural schematic diagram of the pin contact protruding part and the socket contact groove in the floating blind mating RF coaxial connector with constant impedance of the present invention;

Fig. 3 is a schematic diagram of the structure of the floating blind mating radio frequency coaxial connector with constant impedance of the present invention when the pin contact protruding part contacts the guide hole of the conductor in the jack;

Fig. 4 is a schematic diagram of the structure of the fixed-impedance floating blind-mating RF coaxial connector of the present invention after the pin contact is completely inserted into the pin contact.

Among them, the component label description:

1. Jack contacts:

11. The inner conductor of the jack; 111. The pin receiving cavity; 112. The slotted end; 113. The third chamfer;

12. Jack outer conductor; 121. Docking jack; 122. Cavity; 123. First chamfer; 124. Jack datum plane; 125. Second chamfer;

13. Jack insulator;

2. Pin contacts:

21. Inner conductor of pin; 211. Contact pin; 2111. Chamfering of contact pin;

22. Outer conductor of pin; 221. Contact inner cavity; 2211. Insert chamfering of inner cavity;

23. Pin intermediate conductor; 231. Protruding socket part; 2311. Slot; 2312. Elastic contact ring; 2313. Contact fillet; 232. Pin positioning end face;

24. Pin insulator.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention:

As shown in Figure 1, the floating type blind-mating radio frequency coaxial connector with constant impedance of the present invention includes a socket contact 1 and a pin contact 2; the socket contact 1 includes: a socket inner conductor 11, a socket Hole outer conductor 12 and jack insulator 13, said jack insulator 13 is arranged between said jack inner conductor 11 and said jack outer conductor 12; said pin contact 2 includes: pin inner conductor 21 , the pin outer conductor 22, the pin intermediate conductor 23, and the pin insulator 24, the pin inner conductor 21 and the pin intermediate conductor 23 are sleeved inside the pin outer conductor 22, the pin insulator 24 Located between the pin inner conductor 21 and the pin intermediate conductor 23;

The outer conductor 12 of the jack is provided with a docking jack 121 and a cavity 122 for accommodating the front end of the inner conductor 11 of the jack; The socket reference surface 124 of the outer conductor 12 is provided with a second chamfer 125;

The socket inner conductor 11 is provided with a pin receiving cavity 111 and a slotted closing opening 112, and the insertion end of the pin receiving cavity 111 is provided with a third chamfer 113;

The front end of the pin inner conductor 21 is provided with a contact pin 211 that can be inserted into the pin accommodation cavity 111 of the jack inner conductor 11, and the head of the contact pin 211 is provided with a contact pin chamfer 2111;

The pin outer conductor 22 is provided with a contact cavity 221 capable of receiving and inserting the front end of the jack outer conductor 12 , and the insertion end of the contact cavity 221 is provided with a cavity insertion chamfer 2211 ;

The pin intermediate conductor 23 is provided with a protruding socket part 231 and a pin positioning end surface 232 that can be matched with the docking socket 121, and the depth of the docking socket 121 is greater than that of the protruding socket part. 231, the socket reference surface 124 of the socket outer conductor 12 is in close contact with the positioning end surface 232 after plugging, and the protruding socket part 231 is provided with a slot 2311 and an elastic contact ring 2312, so The front end of the elastic contact ring 2312 is provided with a contact fillet 2313 .

As shown in FIG. 2 , since the second chamfer 125 in the socket outer conductor 12 and the cavity insertion chamfer 2211 in the pin outer conductor 22 can allow a certain radial deviation during insertion, During the mating process, even if there is a certain radial deviation between the inner conductor 21 and the mating socket 121, the mating can be smoothly performed, that is, radial floating mating can be realized.

A first gap H0 is provided between the front end surface of the socket inner conductor 11 and the end surface of the cavity 122 of the socket outer conductor 12 .

The size of the first gap H0 is approximately 1/8 of the diameter of the cavity 122 of the socket outer conductor 12 .

A second gap H1 is defined between the rear end surface of the contact pin 211 and the front end surface of the protruding socket portion 231 .

The length of the contact pins 211 is smaller than the depth of the pin receiving cavity 111 .

As shown in FIG. 3 , when the contact pin 211 is inserted into the pin receiving cavity 111 in the inner conductor 11 of the jack, the outer ring of the outer conductor 12 of the jack and the inner circle of the outer conductor 22 of the pin The ring is a clearance fit, which can be used for auxiliary alignment and centering during the insertion process; the elastic contact ring 2312 provided on the protruding socket part 231 of the pin intermediate conductor 23 and the butt socket 121 have an elastic interference fit , the elastic contact ring 2312 in the protruding socket part 231 can slide axially in the mating socket 121 and maintain a certain contact pressure, so that a stable impedance is formed between the socket outer conductor 12 and the pin intermediate conductor 23, The socket outer conductor 12 also forms a stable impedance through the pin intermediate conductor 23 and the pin outer conductor 22;

At the same time, the contact pins 211 in the pin inner conductor 21 are gradually inserted into the pin accommodating cavity 111 in the socket inner conductor 11, and the contact conduction forms a stable impedance;

As shown in FIG. 4 , from the insertion of the socket contact 1 and the pin contact 2 until the positioning of the socket reference plane 124 in the socket outer conductor 12 and the pin intermediate conductor 23 Until the end surface 232 is in close contact, the contact pins 211 and the pin receiving chambers 111 in the inner conductor 11 of the jack, and the mating jack 121 in the outer conductor 12 of the jack and the middle conductor 23 of the pin The diameter and contact pressure of the protruding socket portion 231 remain unchanged during the mating process, thereby ensuring a constant impedance and stable electrical performance, even in the millimeter wave frequency band.

Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Claims (5)

1. A floating type blind mating radio frequency coaxial connector with constant impedance, comprising a jack contact and a pin contact, characterized in that: the jack contact includes: a jack inner conductor, a jack outer conductor and Jack insulator, the jack insulator is arranged between the jack inner conductor and the jack outer conductor; the pin contact includes: pin inner conductor, pin outer conductor, pin intermediate conductor and A pin insulator, the pin inner conductor and the pin intermediate conductor are sleeved inside the pin outer conductor, and the pin insulator is arranged between the pin inner conductor and the pin intermediate conductor; The outer conductor of the jack is provided with a butt jack and a cavity capable of accommodating the front end of the inner conductor of the jack; the entrance end of the butt jack is provided with a first chamfer, and the jack of the outer conductor of the jack is A second chamfer is provided on the datum plane; The inner conductor of the socket is provided with a pin accommodation cavity and a slotted closing opening, and the insertion end of the pin accommodation cavity is provided with a third chamfer; The front end of the inner conductor of the pin is provided with a contact pin that can be inserted into the pin accommodation cavity of the inner conductor of the jack, and the head of the contact pin is provided with a contact pin chamfer; The outer conductor of the pin is provided with a contact inner cavity capable of receiving and inserting the front end of the outer conductor of the socket, and the insertion end of the contact inner cavity is provided with an inner cavity insertion chamfer; The intermediate conductor of the pin is provided with a protruding socket part and a pin positioning end surface that can be matched with the butt socket, and the depth of the butt socket hole is greater than the length of the protruding socket part, and the socket Finally, the socket reference surface of the socket outer conductor is in close contact with the pin positioning end surface, and the protruding socket part is provided with a slot and an elastic contact ring, and the front end of the elastic contact ring is provided with a contact ring. horn. 2. A floating type blind mating RF coaxial connector with constant impedance according to claim 1, characterized in that: between the front end face of the inner conductor of the jack and the end face of the cavity of the outer conductor of the jack A first gap is provided. 3. A floating type blind mating RF coaxial connector with constant impedance according to claim 2, characterized in that: the size of the first gap is 1/8 of the cavity diameter of the outer conductor of the jack . 4. A floating blind-mating RF coaxial connector with constant impedance according to claim 1, characterized in that: there is an arrangement between the tail end face of the contact pin and the front end face of the protruding plug part. There is a second gap. 5 . The constant-impedance floating blind-mate radio frequency coaxial connector according to claim 1 , wherein the length of the contact pins is smaller than the depth of the pin accommodating cavity. 6 .