CN110739517B - One-to-three single-ended-balanced microwave filtering power distribution system - Google Patents

Abstract

The invention discloses a one-point three-way single-ended-balanced microwave filtering power distribution system, comprising a dielectric substrate, a metal ground, three metallized right-angled triangles all connected with a metallized rectangle, and a metallized via hole is connected to the three metal the right-angled triangle and the metal ground. The metallized rectangle is connected with a single metal strip, and each metallized right triangle is connected with a pair of metal strips to form three 1/32 mode substrate integrated waveguide multimode resonators, single-ended microstrip input feeder , Three pairs of balanced microstrip output feeders. This system enables three 1/32 mode substrates to integrate waveguide multimode resonators

and

mode works in differential mode,

and

The mode works in the common mode, forming a three-way single-ended-balanced microwave filter power distribution system, and has the characteristics of low loss and simple structure.

Description

One-to-three single-ended-balanced microwave filtering power distribution system

Technical Field

The invention relates to the field of microwave communication, in particular to a one-to-three single-ended-balanced type microwave filtering power distribution system.

Background

The one-path and multi-path power distribution system can divide one path of microwave signals into multiple paths of microwave signals and is widely applied to systems such as radars, phased arrays, array antennas and the like. The single-ended-balanced type microwave power distribution system not only has a common mode rejection function, but also can be simultaneously connected with a single-ended circuit and a balanced type circuit so as to adapt to different system requirements; the microwave power distribution system with the filtering function can reduce the number of devices, improve the integration level of the system, reduce the loss and improve the comprehensive performance of the system. The one-to-three single-ended-balanced microwave filtering power distribution system has all the characteristics and is an important part in a microwave system.

The single-ended-balanced power distribution system reported at present is mainly realized based on a microstrip structure and is divided into a filtering type design and a non-filtering type design. The non-filtering type design does not have a filtering function, and the design methods mainly comprise two types, one type is realized based on the microstrip type Wilkinson power divider externally connected with a half-wavelength microstrip line, and the other type is realized based on the microstrip coupling type Wilkinson power divider externally connected with a half-wavelength coupling microstrip line. The single-ended-balanced power distribution system realized based on the two design methods does not have a filtering function, and an external filter is needed when the system needs the filtering function, so that the integration and miniaturization of a microwave system are not facilitated. The filtering type single-ended-balanced power distribution system integrates the filtering technology and the single-ended-balanced power distribution technology, is realized in the design of a single device, and is beneficial to the miniaturization and integration of a microwave system. The current single-ended-balanced filtering power distribution system mainly comprises two design methods, one is realized by combining a coupling feed Wilkinson power divider with a 180-degree inverter, and the other is realized by combining a multi-layer double-sided strip line with a half-mode defected ground structure. Although the two methods can obtain functions of one-to-two power distribution, filtering, single-ended-balanced conversion and the like, the two methods also have the problems of incapability of dividing into three paths, large loss, complex structure and the like. Therefore, the single-ended-balanced filtering power distribution system with low loss, simple structure and one-to-three paths is provided, and is beneficial to improving the comprehensive performance of the microwave power distribution system.

Disclosure of Invention

The purpose of the invention is as follows: in view of the above prior art, a one-to-three-way single-ended-balanced type microwave filtering power distribution system is provided, so that the system has the functions of one-to-three-way power distribution, filtering and single-ended-balanced type conversion, and has the advantages of low loss and simple structure.

The technical scheme is as follows: a one-to-three single-ended-balanced microwave filtering power distribution system comprises a medium substrate, wherein a metal ground is arranged on the bottom surface of the medium substrate, three metalized right-angled triangles and a metalized rectangle positioned in the center are arranged on the front surface of the medium substrate, the three metalized right-angled triangles are connected with the metalized rectangle, and the microwave filtering power distribution system also comprises metalized through holes for connecting the three metalized right-angled triangles and the metal ground; the metallized rectangles are connected with a single metal strip, and each metallized right-angle triangle is connected with a pair of metal strips; the metal ground, the dielectric substrate and the single metal strip form a single-ended microstrip input feeder line, and the metal ground, the dielectric substrate and the three pairs of metal strip pairs form three pairs of balanced microstrip output feeder lines.

Furthermore, the positions and the intervals of the three pairs of balanced microstrip output feeders are set, so that the three substrate integrated waveguide multi-mode resonators with thirty-one-half modes are enabled to be arranged

And

mode operation in differential mode, in said thirty-half mode substrate integrated waveguide multimode resonator

And

the modes operate in common mode.

Further, the three thirty-half mode substrate integrated waveguide multimode resonators are distributed in a T shape and have the same size.

Furthermore, the distance between the two metal strips of each pair of balanced microstrip output feeders is half of the guided wave wavelength of the center frequency.

Has the advantages that: the system enables three thirty-one half mode substrate integrated waveguide multimode resonators

And

the die is operated in a differential mode,

and

the mode works in a common mode to form a one-to-three single-end-balanced type microwave filtering power distribution system, and the system has the characteristics of low loss and simple structure. Specifically, the method comprises the following steps:

1. each pair of balanced microstrip feed lines is distributed on the integrated waveguide multimode resonator of the thirty-one-half mode substrate by taking half of the guided wave wavelength of the central frequency as the distance, so that the multimode resonator is

And

the die operates in a differential mode, and

and

the mode works in a common mode to form a single-ended-balanced type microwave power distribution system with a differential mode filtering function and a common mode rejection function.

2. The single-ended microstrip input feeder line and the three metallized right-angled triangles at the top layer are connected to a metallized rectangle together, and the metallized rectangle has an input matching function of allocating a one-to-three-way single-ended-balanced type microwave filtering power distribution system.

3. The three thirty-half mode substrate integrated waveguide multimode resonators are distributed in a T shape and have the same size, and the three output channels are ensured to have the same working frequency, filtering power and equal power division ratio output.

Drawings

FIG. 1 is a schematic top view of the system of the present invention;

FIG. 2 is a schematic diagram of a front view of the system of the present invention;

FIG. 3 is a differential mode response simulation diagram of the system of the present invention;

FIG. 4 is a simulation of the common mode response of the system of the present invention;

FIG. 5 is a simulation diagram of the differential mode phase difference of three pairs of balanced output ports of the system of the present invention.

Detailed Description

The invention is further explained below with reference to the drawings.

As shown in fig. 1 and fig. 2, a one-to-three single-ended-balanced microwave filtering power distribution system includes a dielectric substrate 2, a metal ground 1 is disposed on a bottom surface of the dielectric substrate 2, and three metalized right-angled triangles 3 with the same size and a metalized rectangle 12 located in the center are disposed on a front surface of the dielectric substrate 2. The three metallized right-angled triangles 3 are all connected with the metallized rectangle 12 through one corner, and the short side of the right angle far away from the metallized rectangle 12 is provided with a metallized through hole 4 for connecting the metallized right-angled triangle 3 with the metal ground 1. A single strip 5 is connected to the metallized rectangle 12, and a pair of strips 6 and 7, 8 and 9, 10 and 11 are connected to the right-angled long side of each metallized right-angled triangle 3. The metal ground 1, the dielectric substrate 2, the three metallized right-angled triangles 3 and the metallized through holes 4 form three thirty-one-half mode substrate integrated waveguide multimode resonators, and the three thirty-one-half mode substrate integrated waveguide multimode resonators are distributed in a T shape and have the same size. The metal ground 1, the dielectric substrate 2 and the single metal strip 5 form a single-ended microstrip input feeder. The metal ground 1, the dielectric substrate 2 and the three pairs of metal strip pairs 6-11 form three pairs of balanced microstrip output feeders which are used as three pairs of balanced ports A, B and C.

Signals are input into the three thirty-one half mode substrate integrated waveguide multimode resonators from the single-ended microstrip input feeder, and then are output by the three pairs of balanced microstrip output feeders. The distance between the two metal strips of each pair of balanced microstrip output feeders is half of the guided wave wavelength of the central frequency, so that the three thirty-half mode substrate integrated waveguide multimode resonators

And

mode working in differential mode, thirty-half mode substrate integrated waveguide multimode resonator

And

the modes operate in common mode. Due to the fact that

And

the operating frequencies of the modes are respectively

And

and the two sides of the mode working frequency are respectively provided with a differential mode transmission zero point in the two sides of the differential mode passband. Meanwhile, as the resonators are the same and uniformly distributed, the three outputs are in the same amplitude and phase. Compared with the existing single-ended-balanced type microwave power distribution system, the system has the functions of power distribution, filtering and single-ended-balanced type conversion in one path and three paths, and has the advantages of low loss and simple structureAnd (4) point.

In this embodiment, the physical size of the one-to-three single-ended-balanced type microwave filtering power distribution system is 104mm × 53.5mm, and the corresponding electrical size is 1.2 λ₀×0.62λ₀，λ₀Is the free wave wavelength at the center frequency. In this example, an RO4003C substrate was used, which had a dielectric constant of 3.38, a loss angle of 0.0027 and a thickness of 0.813 mm. The differential mode frequency response of the design is shown in fig. 3, and it can be seen that the center frequency is 3.5GHz, the 15-dB matching bandwidth is 35%, the insertion loss is only 0.09dB, and the isolation in the pass band is above 10 dB. The common mode frequency response of the design is shown in fig. 4, the common mode rejection bandwidth of more than 15dB is 52%, and the differential mode passband can be well covered, so that the rejection of common mode noise in the range of the differential mode passband is effectively ensured. The differential mode phase difference between the three pairs of balanced output ports of the design is shown in fig. 5, the phase imbalance is 0 +/-5 degrees, and the corresponding frequency interval is 2.5-4.5 GHz.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (3)

1. The one-to-three single-ended-balanced microwave filtering power distribution system is characterized by comprising a dielectric substrate (2), wherein a metal ground (1) is arranged on the bottom surface of the dielectric substrate (2), three metalized right-angled triangles (3) and a metalized rectangle (12) positioned in the center are arranged on the front surface of the dielectric substrate (2), the three metalized right-angled triangles (3) are connected with the metalized rectangle (12), and the one-to-three single-ended-balanced microwave filtering power distribution system further comprises metalized through holes (4) for connecting the three metalized right-angled triangles (3) and the metal ground (1); the metallization rectangle (12) is connected with a single metal strip (5), and each metallization right-angle triangle (3) is connected with a pair of metal strips (6-11); the metal ground (1), the dielectric substrate (2), the three metallized right-angled triangles (3) and the metallized through holes (4) form three thirty-half mode substrate integrated waveguide multimode resonators, the metal ground (1), the dielectric substrate (2) and the single metal strip (5) form a single-ended microstrip input feeder, and the metal ground (1), the dielectric substrate (2) and the three pairs of metal strip pairs (6-11) form three pairs of balanced microstrip output feeders;

the three metallized right-angle triangles (3) are the same in shape, the vertex angles of the three metallized right-angle triangles (3) are respectively connected with three rectangular sides of the metallized rectangle (12), the vertex angles are non-right angles adjacent to the longer right-angle side in the metallized right-angle triangle, the other rectangular side of the metallized rectangle (12) is connected with the single metal strip (5), and the longer right-angle side of each metallized right-angle triangle (3) is respectively connected with a pair of metal strips;

the distance between the two metal strips of each pair of balanced microstrip output feeders is half of the guided wave wavelength of the center frequency.

2. The one-to-three single-ended-balanced microwave filtered power distribution system of claim 1, wherein the three thirty-one-half mode substrate integrated waveguide multimode resonators are formed by positioning and spacing the three pairs of balanced microstrip output feeds

And

mode operation in differential mode, in said thirty-half mode substrate integrated waveguide multimode resonator

And

the modes operate in common mode.

3. The one-to-three single-ended-balanced microwave filtering power distribution system according to claim 1, wherein the three thirty-one-half mode substrate integrated waveguide multimode resonators are distributed in a T-shape and are equal in size.

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