CN104051834B - A kind of S-band micro-strip inverse filtering power splitter - Google Patents

Abstract

The present invention relates to a kind of S-band micro-strip inverse filtering power splitter, it includes four resonators and load, and wherein, the coefficient of coup between the first resonator and source above thereof is m '_S1=1.11, the coefficient of coup m ' between the first resonator and the second resonator₁₂=1.064, the coefficient of coup m ' between the second resonator and the 3rd resonator₂₃And the coefficient of coup m ' between the second resonator and the 4th resonator₂₄Order of magnitude is identical, andI.e. power distribution branch road coefficient of coup absolute value is identical and be coefficient of coup size between resonator in respective filter3rd resonator and the first load L₁Between the coefficient of coupWith the 4th resonator 4 and the second load L₂Between the coefficient of coupIdentical, andThus can obtain the coefficient of coup matrix of filtering power splitter.Inverse filtering power splitter of the present invention can not only realize the mean allocation of output port power, moreover it is possible to makes phase of output signal contrary, is suitable for the anti-phase feed of needs or the application scenario of inversion signal, has good rejection ability simultaneously to out of band signal.

Description

A kind of S-band micro-strip inverse filtering power splitter

Technical field

The present invention relates to infomation detection field, particularly relate to a kind of S-band micro-strip inverse filtering power splitter.

Background technology

Microwave power distributor tool in antenna array, power system etc. is widely used.There are many grinding about microwave power distributor Study carefully；Common microwave power distributor is Wilkinson power divider, and this power splitter employs impedance transformation line to ensure each port Characteristic impedance is the most identical.

But, the good suppression to working band external signal relatively difficult to achieve of this power splitter；The occasion additionally having also needs to defeated Go out anti-phase, the anti-phase output relatively difficult to achieve of this power splitter.

In view of drawbacks described above, creator of the present invention obtains this creation finally through research for a long time and practice.

Summary of the invention

It is an object of the invention to provide a kind of S-band micro-strip inverse filtering power splitter, in order to overcome above-mentioned technological deficiency.

For achieving the above object, the present invention provides a kind of S-band micro-strip inverse filtering power splitter, and it includes four resonators And load, wherein, the coefficient of coup between the first resonator and source above thereof is m '_S1=1.11, the first resonator and second humorous Shake the coefficient of coup m ' between device₁₂=1.064, the coefficient of coup m ' between the second resonator and the 3rd resonator₂₃With the second resonator And the coefficient of coup m ' between the 4th resonator₂₄Order of magnitude is identical, andI.e. power Distribution branch road coefficient of coup absolute value is identical and be coefficient of coup size between resonator in respective filter

3rd resonator and the first load L₁Between the coefficient of coupWith the 4th resonator and the second load L₂Between The coefficient of coupIdentical, andThus obtain the coefficient of coup matrix of filtering power splitter, such as following matrix Shown in,

$\left[m1\right]=\left[\begin{array}{ccccccc}0& m_{S1}^{\′}& 0& 0& 0& 0& 0\\ m_{S1}^{\′}& 0& m_{12}^{\′}& 0& 0& 0& 0\\ 0& m_{12}^{\′}& 0& m_{23}^{\′}& m_{24}^{\′}& 0& 0\\ 0& 0& m_{23}^{\′}& 0& 0& m_{3L_1}^{\′}& 0\\ 0& 0& m_{24}^{\′}& 0& 0& 0& m_{4L_2}^{\′}\\ 0& 0& 0& m_{3L_1}^{\′}& 0& 0& 0\\ 0& 0& 0& 0& m_{4L_2}^{\′}& 0& 0\end{array}\right]$

In formula,

$m_{S1}^{\′}=m_{3L_1}^{\′}=m_{4L_2}^{\′}=1.11$

Make m '₂₃=-m '₂₄, then output will be anti-phase.

$m_{12}^{\′}=\sqrt{2}{m}_{23}^{\′}=\sqrt{2}{m}_{24}^{\′}=1.064$

Further, it includes four modules, and the first module is importation, including described first resonator and input A；

Three module includes described second resonator, its by energy from the first module first resonator coupling come, then Energy is divided equally to the second module and the resonator in the 4th module；

Second module is output part, including described 4th resonator and outfan I；

4th module is output part, including described 3rd resonator and outfan R.

Further, described second module and the 4th module are symmetrical about three module, the first module and three module spacing 0.5mm, the second module and three module spacing are 0.4mm, and the 4th module and three module spacing are 0.4mm.

Further, described input A, outfan I and R width are 1.6mm, and input A length is any, outfan I and R length Spend identical.

The beneficial effects of the present invention is compared with prior art: the present invention can conveniently utilize the wave filter coefficient of coup Obtain the coefficient of coup of filtering power splitter so that filtering power splitter design is substantially similar to wave filter design, so that designing Journey is simplified；Inverse filtering power splitter can not only realize the mean allocation of output port power, moreover it is possible to makes phase of output signal On the contrary, it is suitable for the anti-phase feed of needs or the application scenario of inversion signal；In work strip, the flatness of Insertion Loss is preferable, to out of band signal There is good rejection ability.

Accompanying drawing explanation

Fig. 1 is the third-order filter topological diagram that the present invention utilizes；

Fig. 2 is the topological diagram that the present invention filters power splitter；

Fig. 3 is the filtering power divider structure schematic diagram that the present invention has anti-phase output.

Detailed description of the invention

Below in conjunction with accompanying drawing, to the present invention, above-mentioned and other technical characteristic and advantage are described in more detail.

Referring to shown in Fig. 1, it is third-order filter topological diagram of the present invention, "●" representation signal source and load in figure, "○" represents resonator, for third-order filter, has 3 resonators here；The coefficient of coup matrix of this third-order filter is N + 2=5 rank, as shown in formula (1),

$\left[m\right]=\left[\begin{array}{ccccc}0& 1.11& 0& 0& 0\\ 1.11& 0& 1.064& 0& 0\\ 0& 1.064& 0& 1.064& 0\\ 0& 0& 1.064& 0& 1.11\\ 0& 0& 0& 1.11& 0\end{array}\right]---\left(1\right)$

Referring to shown in Fig. 2, it filters the topological diagram of power splitter for the present invention, source S in this topological diagram, the first resonator 1, Second resonator 2 and the therebetween coefficient of coup are identical with Fig. 1；In order to carry out power distribution, the energy equal proportion of the second resonator 2 Feeding the 3rd resonator 3 and the 4th resonator 4, energy is given load L by the 3rd resonator 3 again₁, amount is sent by the 4th resonator 4 Give load L₂。

The present invention uses analytic method, and the parameter between the second resonator 2 and source above and load etc. keeps constant (m′_S1=1.11, m '₁₂=1.064), the coefficient of coup m ' between the second resonator 2 and the 3rd resonator 3₂₃With the second resonator 2 And the coefficient of coup m ' between the 4th resonator 4₂₄Order of magnitude is identical, and(i.e. merit Rate distribution branch road coefficient of coup absolute value is identical and be coefficient of coup size between resonator in respective filter)；

3rd resonator 3 and the first load L₁Between the coefficient of coupWith the 4th resonator 4 and the second load L₂Between The coefficient of coupIt is identical and identical with the 3rd resonator in Fig. 1 and the coefficient of coup between load L, Obtaining the coefficient of coup matrix of filtering power splitter, this filtering power splitter coefficient matrix is N+4=7 rank, such as following formula (2) institute Show,

$\left[m1\right]=\left[\begin{array}{ccccccc}0& m_{S1}^{\′}& 0& 0& 0& 0& 0\\ m_{S1}^{\′}& 0& m_{12}^{\′}& 0& 0& 0& 0\\ 0& m_{12}^{\′}& 0& m_{23}^{\′}& m_{24}^{\′}& 0& 0\\ 0& 0& m_{23}^{\′}& 0& 0& m_{3L_1}^{\′}& 0\\ 0& 0& m_{24}^{\′}& 0& 0& 0& m_{4L_2}^{\′}\\ 0& 0& 0& m_{3L_1}^{\′}& 0& 0& 0\\ 0& 0& 0& 0& m_{4L_2}^{\′}& 0& 0\end{array}\right]---\left(2\right)$

In formula,

$m_{S1}^{\′}=m_{3L_1}^{\′}=m_{4L_2}^{\′}=1.11$

$m_{12}^{\′}=\sqrt{2}{m}_{23}^{\′}=\sqrt{2}{m}_{24}^{\′}=1.064$

Not accounting for outbound course, m ' 23=m ' 24 in calculated above, if making m ' 23=-m ' 24, then output will be anti- Phase (uses anti-phase output, m ' in the present invention₂₃=-m '₂₄If requiring that homophase exports, then m '₂₃=m '₂₄)；In the present invention Using dielectric-slab relative dielectric constant is 2.2, and thickness is 0.508mm.

Referring to shown in Fig. 3, it has the filtering power divider structure schematic diagram of anti-phase output for the present invention, and this S-band is micro- Band inverse filtering power splitter comprises four modules altogether, and the first module 1 is importation, containing the first resonator 1 and input A；

Three module 3 is the second resonator, and the energy the first resonator 1 from the first module 1 is coupled by it, then by energy Amount is divided equally to resonator in the second module 2 and the 4th module 4；

Second module 2 is output part, containing the 4th resonator 4 and outfan I；

4th module 4 is output part, containing the 3rd resonator 3 and outfan R.

As it is shown on figure 3, wherein the second module 2 and the 4th module 4 are symmetrical about three module 3, the first module 1 and the 3rd mould Block 3 spacing is 0.5mm, and the second module 2 and three module 3 spacing are 0.4mm, and the 4th module 4 with three module 3 spacing is 0.4mm。

In first module 1, A is input, and in the second module 2, in I and the 4th module 4, R is outfan, and R Yu I output letter Number constant amplitude is anti-phase.

Input A, outfan I and R width are 1.6mm, and input A length is any, and outfan I and R length need are identical.

In described first module 1, each several part size is as follows:

B: long 7.6mm, wide 0.5mm, B are a part for first resonator, are joined directly together with input A；

C: long 5.9mm, wide 0.5mm, be the ingredient of the first resonator；

D: long 3mm, wide 3.1mm, be the ingredient of the first resonator；

E: long 2.9mm, wide 3.1mm, be the ingredient of the first resonator；

F: long 6.3mm, wide 0.5mm, be the ingredient of the first resonator；

Spacing 1.4mm between D and E；

On the right side of output terminals A on the right side of B 5.8mm；

Wherein D, C, B, F, E are sequentially connected with, A with B is connected, as it is shown on figure 3,

In module 2, each several part size is as follows:

G: long 3.1mm, wide 2.7mm, be the ingredient of the second resonator；

H: long 0.5mm, wide 6.3mm, be the ingredient of the second resonator；

J: long 7.6mm, wide 0.5mm, be the ingredient of the second resonator；

K: long 0.5mm, wide 6.2mm, be the ingredient of the second resonator；

L: long 3.1mm, wide 2.8mm, be the ingredient of the second resonator；

L and G is spaced 1.4mm；

Outfan I upper end is away from J upper end 5.7mm.

Wherein G, H, J, K, L are sequentially connected with, I with J is connected, as shown in Figure 3.

In three module 3, each several part size is as follows:

M: long 2.2mm, wide 3.2mm, be the ingredient of the 3rd resonator；

N: long 0.5mm, wide 6.1mm, be the ingredient of the 3rd resonator；

O: long 10mm, wide 0.5mm, be the ingredient of the 3rd resonator；

P: long 0.5mm, wide 6.1mm, be the ingredient of the 3rd resonator；

Q: long 2.2mm, wide 3.2mm, be the ingredient of the 3rd resonator；

M, N, O, P, Q are sequentially connected with.

4th module 4 is identical and symmetrically placed about three module 3 with the second module 2 structure.

The foregoing is only presently preferred embodiments of the present invention, be merely illustrative for invention, and nonrestrictive. Those skilled in the art understands, it can be carried out many changes, revise in the spirit and scope that invention claim is limited, Even equivalence, but fall within protection scope of the present invention.

Claims (3)

1. a S-band micro-strip inverse filtering power splitter, it is characterised in that it includes four resonators and load, wherein, first The coefficient of coup between resonator and source above thereof is m '_S1=1.11, the coefficient of coup between the first resonator and the second resonator m′₁₂=1.064, the coefficient of coup m ' between the second resonator and the 3rd resonator₂₃And between the second resonator and the 4th resonator Coefficient of coup m '₂₄Order of magnitude is identical, andI.e. power distribution branch road coupled systemes Number absolute values are identical and be coefficient of coup size between resonator in respective filter

The coefficient of coup between 3rd resonator 3 and the first load L1With the 4th resonator 4 and the second load L₂Between coupling Syzygy numberIdentical, andThus obtain the coefficient of coup matrix of filtering power splitter, such as following matrix institute Show,

$\[m1\]=\left[\begin{array}{ccccccc}0& m_{S1}^{\′}& 0& 0& 0& 0& 0\\ m_{S1}^{\′}& 0& m_{12}^{\′}& 0& 0& 0& 0\\ 0& m_{12}^{\′}& 0& m_{23}^{\′}& m_{24}^{\′}& 0& 0\\ 0& 0& m_{23}^{\′}& 0& 0& m_{3L_1}^{\′}& 0\\ 0& 0& m_{24}^{\′}& 0& 0& 0& m_{4L_2}^{\′}\\ 0& 0& 0& m_{3L_1}^{\′}& 0& 0& 0\\ 0& 0& 0& 0& m_{4L_2}^{\′}& 0& 0\end{array}\right]$

In formula,

Make m '₂₃=-m '₂₄, then output will be anti-phase；

It includes four modules, and the first module is importation, including described first resonator and input A；

Three module includes described second resonator, and the energy the first resonator coupling from the first module is come, then by energy by it Amount is divided equally to the second module and the resonator in the 4th module；

Second module is output part, including described 4th resonator and outfan I；

4th module is output part, including described 3rd resonator and outfan R.

S-band micro-strip inverse filtering power splitter the most according to claim 1, it is characterised in that described second module and the Four modules are symmetrical about three module, and the first module and three module spacing 0.5mm, the second module with three module spacing is 0.4mm, the 4th module and three module spacing are 0.4mm.

S-band micro-strip inverse filtering power splitter the most according to claim 1 and 2, it is characterised in that described input A, defeated Going out to hold I and R width is 1.6mm, and input A length is any, and outfan I and R length is identical.