CN103904406B - A kind of 3dB electric bridge with trapezoidal partition rod - Google Patents

Abstract

The invention discloses a 3dB electric bridge with a trapezoidal separation rod; the ring-shaped coupling effect can be greatly enhanced by setting the annular first coupling part and the second coupling part, and the coupling coefficient measured and calculated by the simulation software is high , the coupling frequency can reach 2950KHZ, which greatly meets the requirements of the current mainstream LTE technical standards. Separators greatly increase isolation.

Description

A 3dB bridge with trapezoidal separator

technical field

The invention relates to the technical field of co-frequency combiner accessories, in particular to a 3dB electric bridge with a trapezoidal separating rod.

Background technique

In the same-frequency combiner, the main component is the 3dB bridge. The 3dB bridge is an electrical device that couples two signals of the same frequency into one output signal; it requires high coupling, precision, and wide frequency band. ;It is widely used in the communication industry. Among them, in the new standard LTE of the communication industry, the frequency band required by the LTE standard is 2570MHz-2750MHz. In the same-frequency combiner currently on the market, the 3dB bridge used generally couples the frequency The width is 600MHz-2400MHz, which cannot meet the frequency band required by the new LTE standard. In addition, in order to achieve the purpose of broadband, the 3dB on the market currently uses different coupling line forms, resulting in waste of molds, so it has the disadvantage of high production costs; and the current bridge isolation on the market is small.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned shortcomings, and provide a 3dB bridge with a wide coupling frequency up to 2950MHZ, two coupled lines with the same shape, cost saving and high isolation.

In order to achieve the above object, the specific solution of the present invention is as follows: a 3dB electric bridge with a trapezoidal separation rod includes a first coupling line and a second coupling line, and the first coupling line includes a circular first coupling portion , a first output pin extending obliquely upward from one side of the first coupling part, and a first input pin extending obliquely downward from the other side of the first coupling part; the free end of the first output pin is provided with a first output end, the free end of the first input pin is set as the first input end;

The second coupling line includes a circular second coupling part, a second output pin extending obliquely upward from one side of the second coupling part, and a second input pin extending obliquely downward from the other side of the second coupling part. pin; the free end of the second output pin is set as the second output end, and the free end of the first input pin is set as the second input end;

The first coupling line and the second coupling line are parallel and overlapped, and the distance between the first coupling part and the second coupling part is 4mm-8mm;

Both sides of the first coupling part and the second coupling part are respectively provided with mounting holes, an insulating support is provided between the mounting holes of the first coupling part and the corresponding mounting holes of the second coupling part, and the first The coupling part and the second coupling part are fixed by insulating pillars;

The top of the inner ring of the first coupling portion extends downwards with a trapezoidal first separation rod, the width of the lower base of the first separation rod is 3 mm, and the width of the upper base is 1 mm. There is also a circular first separating piece extending downwards from the upper base;

The bottom end of the inner ring of the second coupling portion extends upwards with a trapezoidal second separation rod, the lower bottom of the second separation rod is 3 mm wide, and the upper bottom is 1 mm wide. The second separation rod There is also a circular second separating piece extending upwards from the upper base.

Wherein, the first coupling line and the second coupling line have the same shape and are arranged symmetrically.

Wherein, the inner ring diameters of the first coupling part and the second coupling part are both 25mm.

Wherein, each insulating pillar is provided with two card slots, and the distance between the two card slots of each insulating column is equal.

Wherein, the distance between the first coupling part and the second coupling part is 5 mm.

The beneficial effects of the present invention are: the ring-shaped coupling effect can be greatly enhanced by setting the ring-shaped first coupling part and the second coupling part, the coupling coefficient measured and calculated by the simulation software is high, and the coupling frequency can reach 2950KHZ, greatly It meets the requirements of the current mainstream LTE technical standards, and its practicability is greatly increased. In addition, its structure is simple, not easy to be damaged, and its service life is long. Moreover, the trapezoidal separation rod and circular separation piece are set to greatly increase the isolation.

Description of drawings

Fig. 1 is the front view of the present invention;

Fig. 2 is the front view of the first coupling line;

Fig. 3 is the front view of the second coupling line;

Fig. 4 is the front view of the same-frequency combiner utilizing the present invention to make;

Fig. 5 is a cross-sectional view when the first coupling line, the second coupling line and the insulating support are mated;

Fig. 6 is a schematic diagram of the present invention reaching the highest coupling frequency in the simulation software;

Explanation of reference numerals among Fig. 1 to Fig. 6:

1-the first coupling line; 11-the first coupling part; 12-the first output pin; 13-the first input pin; 14-the first output end; 15-the first separation rod;

2-the second coupling line; 21-the second coupling part; 22-the second output pin; 23-the second input pin; 24-the second output end; 25-the second separation rod;

3-installation hole; 3a-insulation pillar;

4 - Housing.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, and the implementation scope of the present invention is not limited thereto.

As shown in Figures 1 to 6, a 3dB bridge with a trapezoidal separation rod described in this embodiment includes a first coupling line 1 and a second coupling line 2, and the first coupling line 1 includes a ring shaped first coupling part 11, a first output pin 12 extending obliquely upward from one side of the first coupling part 11, and a first input pin 13 extending obliquely downward from the other side of the first coupling part 11; The free end of the first output pin 12 is provided with the first output port 14, and the free end of the first input pin 13 is provided with the first input port; the second coupling line 2 includes a ring-shaped second coupling portion 21, from the second The second output pin 22 extending obliquely upward from one side of the coupling part 21, and the second input pin 23 extending obliquely downward from the other side of the second coupling part 21; the free end of the second output pin 22 is provided with a second The output terminal 24, the free end of the first input pin 13 is provided with the second input terminal; the first coupling line 1 and the second coupling line 2 are parallel and overlapped, and the first coupling part 11 and the second coupling part 21 are heavy. The distance is 4mm-8mm; the two sides of the first coupling part 11 and the second coupling part 21 are respectively provided with installation holes 3, and the installation holes 3 of the first coupling part 11 and the corresponding installation of the second coupling part 21 Insulating pillars 3a are provided between the holes 3, and the first coupling part 11 and the second coupling part 21 are fixed by the insulating pillars 3a. The ring-shaped first coupling part 11 and the second coupling part 21 can greatly enhance the ring-shaped coupling effect. The coupling coefficient calculated by the simulation software is high, and the coupling frequency can reach 2950KHZ, which greatly satisfies the current mainstream. The requirements of LTE technical standards greatly increase its practicability, and in addition, its structure is simple, it is not easy to be damaged, and its service life is long.

Further, the same-frequency combiner corresponding to it made by using the 3dB electric bridge described in this embodiment includes a housing 4 and the above-mentioned 3dB electric bridge; the above-mentioned 3dB electric bridge is fixed in the casing 4 to form frequency combiner.

Further, in the 3dB electric bridge with trapezoidal separation rods described in this embodiment, the first coupling line 1 and the second coupling line 2 have the same shape and are arranged symmetrically; in this way, the first coupling line 1 and the second coupling line The two coupling lines 2 are produced in the same mold, which saves the cost of the mold, reduces the cost of raw materials, improves the production efficiency, and reduces the accident rate.

Further, in the 3dB electric bridge with a trapezoidal separation rod described in this embodiment, the diameters of the inner rings of the first coupling part 11 and the second coupling part 21 are both 25 mm; through computer software simulation calculation, when the first When the diameters of the inner rings of the coupling part 11 and the second coupling part 21 are both 25 mm, the frequency broadband is optimal and the effect is the best.

Further, in the 3dB electric bridge with a trapezoidal separation rod described in this embodiment, each insulating pillar 3a is provided with two card slots, and the distance between the two card slots of each insulating column is equal; it is set in this way , the distance between the first coupling part 11 and the second coupling part 21 can be precisely controlled, and the distortion of the effect caused by the change of the distance can be prevented.

Furthermore, in the 3dB bridge with trapezoidal separation rods described in this embodiment, the distance between the first coupling part 11 and the second coupling part 21 is 5mm. Calculated by computer software simulation, when the distance between the first coupling part and the second coupling part 21 is 5mm, the frequency broadband is optimal and the effect is the best.

Further, in the 3dB bridge with a trapezoidal separation rod described in this embodiment, a trapezoidal first separation rod 15 extends downward from the top of the inner ring of the first coupling part 11, and the first separation rod 15 extends downward. The lower bottom edge width of bar 15 is 3mm, and the upper bottom edge width is 1mm, and the upper bottom edge of described first separation rod 15 also extends downwards a circular first separation piece; 15 and the circular first separating piece can greatly increase the isolation of the electric bridge. It can be known from computer software simulation that such setting can achieve an isolation of 25db.

Further, in the 3dB electric bridge with a trapezoidal separation rod described in this embodiment, a trapezoidal second separation rod 25 extends upward from the bottom end of the inner ring of the second coupling part 21, and the second separation rod 25 extends upwards. The width of the lower bottom of the rod 25 is 3 mm, and the width of the upper bottom is 1 mm. There is also a circular second separating piece extending upwards from the upper bottom of the second separating rod 25 . As above, by setting the trapezoidal second separating rod 25 and the circular second separating plate, the isolation of the electric bridge can be greatly increased. It can be seen from computer software simulation that such setting can reach an isolation of 25db.

The above is only a preferred embodiment of the present invention, so all equivalent changes or modifications made according to the structure, features and principles described in the patent application scope of the present invention are included in the protection scope of the patent application of the present invention.

Claims (3)

1. A 3dB electric bridge with a trapezoidal separation rod, including a first coupled line (1) and a second coupled line (2), characterized in that: the first coupled line (1) includes a ring-shaped second A coupling part (11), a first output pin (12) extending obliquely upward from one side of the first coupling part (11), a first input pin extending obliquely downward from the other side of the first coupling part (11) pin (13); the free end of the first output pin (12) is set to the first output end (14), and the free end of the first input pin (13) is set to the first input end; the second coupling line (2 ) includes a ring-shaped second coupling part (21), a second output pin (22) extending obliquely upward from one side of the second coupling part (21), and obliquely extending from the other side of the second coupling part (21). The second input pin (23) extended from below; the free end of the second output pin (22) is set as the second output end (24), and the free end of the first input pin (13) is set as the second input end; The first coupling line (1) and the second coupling line (2) are arranged in parallel and overlapping; the two sides of the first coupling part (11) and the second coupling part (21) are respectively provided with installation holes (3), An insulating support (3a) is provided between the installation hole (3) of the first coupling part (11) and the corresponding installation hole (3) of the second coupling part (21), and the first coupling part (11) It is fixed with the second coupling part (21) by insulating pillars (3a); the top end of the inner ring of the first coupling part (11) extends downwards with a trapezoidal first separation rod (15), and the first A separation rod (15) has a lower base width of 3 mm and an upper base width of 1 mm, and a circular first separation piece extends downward from the upper base of the first separation rod (15); A trapezoidal second separation rod (25) extends upward from the bottom of the inner ring of the two coupling parts (21). The width of the lower bottom of the second separation rod (25) is 3mm, and the width of the upper bottom is 1mm. The upper base of the second separation rod (25) also extends upwards with a circular second separation piece; each insulating support (3a) is provided with two card slots, and each insulating support (3a) The distance between the two card slots is equal; the distance between the first coupling part (11) and the second coupling part (21) is 5mm. 2. A 3dB electric bridge with trapezoidal separation rods according to claim 1, characterized in that: the first coupling line (1) and the second coupling line (2) have the same shape and are arranged symmetrically. 3. A 3dB electric bridge with trapezoidal separation rods according to claim 2, characterized in that: the inner ring diameters of the first coupling part (11) and the second coupling part (21) are both 25mm.