CN204375902U - A kind of power splitter - Google Patents

Abstract

The utility model discloses a kind of power splitter, relate to antenna technical field.This power splitter comprises: wiring board, wiring board offers the via hole for welding resistance, and wiring board comprises metal ground plate and metamaterial microstructure medium substrate, shape, the size of metal ground plate and metamaterial microstructure medium substrate are all identical, the one side of metamaterial microstructure medium substrate connects with metal ground plate, metamaterial microstructure medium substrate another side is provided with an input node, four output nodes and four road microstriplines, the two-port of every road microstripline is connected with input node and an output node respectively.The utility model can reduce the loss of electromagnetic wave signal in transmission line, and the phase place of multipath output signals can also be made to be consistent.

Description

A kind of power splitter

Technical field

The utility model relates to antenna technical field, particularly relates to a kind of power splitter.

Background technology

Power splitter Shi Jiang mono-road input signal energy is divided into two-way or multiple-channel output is equal or the device of unequal energy, and be also the Primary Component of communication system, along with progress and the development of science and technology, the requirement of the fields such as the communication technology to power splitter is also more and more higher.

Power splitter in the market mainly adopts traditional Wilkinson power divider, this traditional Wilkinson power divider generally adopts common substrate as medium substrate, because the loss tangent of this medium substrate is comparatively large, in the Wilkinson power divider causing this traditional, the loss of Signal transmissions is larger; And the situation that dielectric distribution is uneven may be there is due to this medium substrate in the preparation of material, the phase equalization of the multipath output signals of this traditional Wilkinson power divider can be made so poor.

Utility model content

The purpose of this utility model is that the loss in order to overcome Wilkinson power divider Signal transmissions traditional in prior art is comparatively large, and the defect that the phase place of multipath output signals is unanimously poor, a kind of power splitter is provided.

A kind of power splitter that the utility model provides, comprise: wiring board, described wiring board offers the via hole for welding resistance, and described wiring board comprises metal ground plate and metamaterial microstructure medium substrate, the shape of described metal ground plate and described metamaterial microstructure medium substrate, size is all identical, the one side of described metamaterial microstructure medium substrate connects with described metal ground plate, described metamaterial microstructure medium substrate another side is provided with an input node, four output nodes and four road microstriplines, described in every road, the two-port of microstripline is connected with input node and an output node respectively.

At this with in novel described power splitter, described wiring board also comprises the green oil layer be coated on described metamaterial microstructure medium substrate.

At this with in novel described power splitter, the shape of described metal ground plate, described metamaterial microstructure medium substrate and described green oil layer is " convex " font.

At this with in novel described power splitter, described metal ground plate, described metamaterial microstructure medium substrate and described green oil layer are provided with the through hole for welding resistance, the via hole on described wiring board is combined by the through hole in described metal ground plate, described metamaterial microstructure medium substrate and described green oil layer respectively.

At this with in novel described power splitter, described wiring board offers three via holes for welding resistance, and described three via holes for welding resistance lay respectively between the output of two branch's microstriplines.

At this with in novel described power splitter, be all welded with isolation resistance at described three via hole places for welding resistance.

At this with in novel described power splitter, described four output nodes lay respectively at the both sides of described metamaterial microstructure medium substrate.

At this with in novel described power splitter, the circuit that every road microstripline all has at least two joint thicknesses not wait.

At this with in novel described power splitter, described power splitter is decile power splitter, every road microstripline include connect successively from input node to output node one-level microstrip line, secondary microstrip line, three grades of microstrip lines, level Four microstrip line and Pyatyi microstrip lines.

At this with in novel described power splitter, the characteristic impedance of described one-level microstrip line, described three grades of microstrip lines and described Pyatyi microstrip line is 40 to 60 ohm, and the characteristic impedance of described secondary microstrip line and described level Four microstrip line is 60 to 80 ohm.

At this with in novel described power splitter, the characteristic impedance of described one-level microstrip line, described three grades of microstrip lines and described Pyatyi microstrip line is 50 ohm, and the characteristic impedance of described secondary microstrip line and described level Four microstrip line is 70.7 ohm.

Compared with prior art, advantage of the present utility model is as follows:

The metamaterial microstructure medium substrate that the power splitter that the utility model provides adopts has microwave modulation function, this metamaterial microstructure medium substrate microwave modulating action can be passed through, reduce the loss of electromagnetic wave signal in transmission line, and regulate electromagnetic phase place, the phase place of the multipath output signals of power splitter is consistent.

Accompanying drawing explanation

Fig. 1 is the structural representation of the power splitter that the utility model embodiment provides;

Fig. 2 is the structural representation of metal ground plate in the utility model embodiment;

Fig. 3 is the structural representation of metamaterial microstructure medium substrate in the utility model embodiment;

Fig. 4 is the structural representation of green oil layer in the utility model embodiment;

Fig. 5 is the fundamental diagram of part microstripline in the utility model embodiment;

Fig. 6 is the structural representation of part microstripline in Fig. 5.

Reference numeral:

1-wiring board, 2-input node, 3-output node, 4-four road microstriplines, 5-via hole, 6-isolation resistance, 11-metal ground plate, 12-metamaterial microstructure medium substrate, 13-green oil layer, through hole on 51-metal ground plate, the through hole on 52-metamaterial microstructure medium substrate, the through hole in 53-green oil layer.

Embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.

Shown in Fig. 1-4, the utility model embodiment provides a kind of power splitter, comprise: wiring board 1, described wiring board offers the via hole 5 for welding resistance, described wiring board 1 comprises metal ground plate 11 and metamaterial microstructure medium substrate 12, the shape of described metal ground plate 11 and described metamaterial microstructure medium substrate 12, size is all identical, the one side of described metamaterial microstructure medium substrate 12 connects 11 with described metal ground plate, described metamaterial microstructure medium substrate 12 another side is provided with an input node 2, four output node 3 and four road microstriplines 4, microstripline (41 described in every road, 42, 43, 44) two-port is connected with input node 2 and an output node 3 respectively.The wiring board 1 of this power splitter also comprises the green oil layer 13 be coated on described metamaterial microstructure medium substrate 12.

In the present embodiment, the shape of described metal ground plate 11, described metamaterial microstructure medium substrate 12 and described green oil layer 13 is " convex " font, size and the minimize weight of this power splitter can be made like this, meet that the modern product advocated is miniaturized, the requirement of lightness.

In the present embodiment, described metal ground plate 11, described metamaterial microstructure medium substrate 12 and described green oil layer 13 are provided with the through hole (51,52,53) for welding resistance, the via hole 5 on described wiring board 1 is combined by the through hole (51,52,53) in described metal ground plate 11, described metamaterial microstructure medium substrate 12 and described green oil layer 13 respectively.As a preferred implementation, described metal ground plate 11 is copper ground plate.

In the present embodiment, described wiring board 1 offers three via holes 5 for welding resistance, and described three via holes 5 for welding resistance are all (specifically shown in Figure 1 between the output of Liang Jie branch microstripline, two branch microstripline L2 are connected with at the end of L1 section microstripline, between the output of this Liang Ge branch microstripline L2, offer a via hole 5, two other via hole 5 lays respectively between the output of other Liang Zuliang branch microstripline).Further, be all welded with isolation resistance 6 (the resistance R in corresponding diagram 5, Fig. 6) at described three via hole 5 places for welding resistance, high-isolation can be realized between Shi Liang branch microstripline like this.

In the present embodiment, described four output nodes 3 lay respectively at the both sides of described metamaterial microstructure medium substrate 12.Shown in Figure 1, described four output nodes are divided equally between two, and lay respectively at the left and right sides of " convex " font metamaterial microstructure medium substrate.

In the present embodiment, the circuit that every road microstripline 4 all has at least two joint thicknesses not wait, like this can effective spread bandwidth, meets the performance requirement of Wideband microstrip power divider.

As a specific implementation example, described power splitter is decile power splitter, its every bar microstripline includes one-level microstrip line L1, the secondary microstrip line L2 connected successively from input node to output node, three grades of microstrip line L3, level Four microstrip line L4 and Pyatyi microstrip line L5, wherein, the characteristic impedance of described one-level microstrip line L1, described three grades of microstrip line L3 and described Pyatyi microstrip line L5 is 40 to 60 ohm, be preferably 50 ohm, the characteristic impedance of described secondary microstrip line L2 and described level Four microstrip line L4 is 60 to 80 ohm, is preferably 70.7 ohm.There is the decile power splitter of this microstripline structure, input signal can be divided into four tunnel output signals.

The operation principle of the power splitter provided of the present utility model is provided in detail below with reference to Fig. 5 and Fig. 6:

Fig. 5 is the fundamental diagram of part microstripline in the utility model embodiment.Shown in Figure 5, signal is Z by characteristic impedance ₀one-level microstrip line port " 1 " input respectively through characteristic impedance be Z ₀₂and Z ₀₃two branch's secondary microstrip lines from port " 2 ", " 3 " export, load resistance is respectively R ₂, R ₃(three grades of microstrip lines namely shown in Fig. 1), the length of two branch's secondary microstrip lines is λ _g/ 4, λ _gcentered by operating frequency wavelength.

The characteristic of above-mentioned each port of part microstripline is as follows:

(1) port " 2 " can be any designated value 1/k with the power output ratio of port " 3 " ²;

(2) input port " 1 " areflexia;

(3) port " 2 " and port " 3 " output voltage constant amplitude, homophase.

We can determine Z according to the characteristic of each port above-mentioned ₀₂, Z ₀₃and R ₂, R ₃value.

Due to port " 2 ", the power output of " 3 " and the pass of output voltage are:

$P_2=\frac{1}{2}\frac{U_2^2}{R_2},P_3=\frac{1}{2}\frac{U_3^2}{R_3}---\left(4\right);$

Require that power output ratio is by condition (1):

Then: $\frac{U_2^2}{2R_2}{k}^2=\frac{U_3^2}{2R_3}---\left(6\right);$

U according to condition in (3) ₂=U ₃, can be obtained by above formula (6):

R ₂＝k ²R ₃(7)；

If get R ₂=kZ ₀(8);

Then $R_3=\frac{Z_0}{k}---\left(9\right);$

Due to condition (2), port " 1 " areflexia, namely requires by Z _in1with Z _in2the total input impedance be formed in parallel equals Z ₀.Because the length of two branch's secondary microstrip lines is λ _g/ 4, then Z _in1=Z ₀₂ ²/ R ₂, Z _in2=Z ₀₃ ²/ R ₃, be pure resistance, so:

$\frac{R_2}{Z_{\mathrm{in}2}}+\frac{R_3}{Z_{\mathrm{in}3}}=\frac{1}{Z_0}---\left(10\right);$

As represented with input resistance, power ratio is then:

$\frac{P_2}{P_3}=\frac{Z_{\mathrm{in}3}}{Z_{\mathrm{in}2}}=\frac{Z_{03}^2}{R_3}\frac{R_2}{Z_{02}^2}=\frac{1}{k^2}---\left(11\right);$

Simultaneous above formula (8) ~ (11) can solve:

$Z_{02}=Z_0\sqrt{k(1+k^2)},Z_{03}=Z_0\sqrt{\frac{(1+k^2)}{k^3}}---\left(12\right);$

In order to increase isolation in port " 2 ", cross-over connection one resistive isolation resistance 6 between " 3 ", the resistance of this isolation resistance 6 is this isolation resistance 6 normally film resistor of making of the material such as nichrome or resistance powder in actual applications.

Shown in Figure 6, above-mentioned two branches' secondary microstrip line port " 2 " in practical situations both, the load that " 3 " place connects not is resistance R ₂and R ₃, but characteristic impedance is Z ₀transmission line, therefore to obtain the merit proportion by subtraction of specifying, need respectively add λ betwixt _gthe microstrip line of/4, as impedance transformer.

As shown in Figure 6, the characteristic impedance of transforming section is respectively Z ₀₄and Z ₀₅, its computing formula is:

$Z_{04}=\sqrt{R_2{Z}_0}=\sqrt{k}{Z}_0;Z_{05}=\sqrt{R_3{Z}_0}=\frac{Z_0}{\sqrt{k}}---\left(13\right)$

For constant power distributor, then P ₃=P ₂, k=1, so have:

R ₂＝R ₃＝Z ₀；

$Z_{02}=Z_{03}=\sqrt{2}{Z}_0;$

R＝2Z ₀。

We according to above-mentioned characteristic impedance of calculating, can utilize microstrip line height low impedance characteristic, and design micro belt line width, can realize power division.

According to above-mentioned analysis, one road input signal energy in part can be become four tunnel output signals by the above-mentioned four road microstriplines designed in the utility model embodiment, then in conjunction with the microwave modulating action of metamaterial microstructure medium substrate, can reach and reduce the loss of input signal in transmission line, and regulate electromagnetic phase place, make the object that the phase place of four tunnel output signals of power splitter is consistent.

Those skilled in the art can carry out various modifications and variations to the utility model embodiment; if these amendments and modification belong within the scope of the utility model claim and equivalent technologies thereof, then these revise and modification also within protection range of the present utility model.

The prior art that the content do not described in detail in specification is known to the skilled person.

Claims (11)

1. a power splitter, it is characterized in that, comprise: wiring board, described wiring board offers the via hole for welding resistance, and described wiring board comprises metal ground plate and metamaterial microstructure medium substrate, the shape of described metal ground plate and described metamaterial microstructure medium substrate, size is all identical, the one side of described metamaterial microstructure medium substrate connects with described metal ground plate, described metamaterial microstructure medium substrate another side is provided with an input node, four output nodes and four road microstriplines, described in every road, the two-port of microstripline is connected with input node and an output node respectively.

2. power splitter as claimed in claim 1, it is characterized in that, described wiring board also comprises the green oil layer be coated on described metamaterial microstructure medium substrate.

3. power splitter as claimed in claim 2, it is characterized in that, the shape of described metal ground plate, described metamaterial microstructure medium substrate and described green oil layer is " convex " font.

4. power splitter as claimed in claim 3, it is characterized in that, described metal ground plate, described metamaterial microstructure medium substrate and described green oil layer are provided with the through hole for welding resistance, the via hole on described wiring board is combined by the through hole in described metal ground plate, described metamaterial microstructure medium substrate and described green oil layer respectively.

5. power splitter as claimed in claim 1, it is characterized in that, described wiring board offers three via holes for welding resistance, and described three via holes for welding resistance lays respectively between the output of two branch's microstriplines.

6. power splitter as claimed in claim 5, is characterized in that, be all welded with isolation resistance at described three via hole places for welding resistance.

7. power splitter as claimed in claim 1, it is characterized in that, described four output nodes lay respectively at the both sides of described metamaterial microstructure medium substrate.

8. power splitter as claimed in claim 7, is characterized in that, the circuit that every road microstripline all has at least two joint thicknesses not wait.

9. power splitter as claimed in claim 8, it is characterized in that, described power splitter is decile power splitter, every road microstripline include connect successively from input node to output node one-level microstrip line, secondary microstrip line, three grades of microstrip lines, level Four microstrip line and Pyatyi microstrip lines.

10. power splitter as claimed in claim 9, it is characterized in that, the characteristic impedance of described one-level microstrip line, described three grades of microstrip lines and described Pyatyi microstrip line is 40 to 60 ohm, and the characteristic impedance of described secondary microstrip line and described level Four microstrip line is 60 to 80 ohm.

11. power splitters as claimed in claim 10, it is characterized in that, the characteristic impedance of described one-level microstrip line, described three grades of microstrip lines and described Pyatyi microstrip line is 50 ohm, and the characteristic impedance of described secondary microstrip line and described level Four microstrip line is 70.7 ohm.