A spaceborne multi-path power divider assembly

Abstract

A kind of spaceborne multi-path power divider assembly, including 1 one-to-four power divider and 2 mirror image symmetry connection one-to-two monitoring power divider, respectively installed in the two sides inside metal shell, protect assembly, isolate signal, save space, reduce weight, one-to-four power divider includes parallel resistance isolation network of printed board welding resistance and four-way power division circuit of microstrip line, increase the tolerance power of power divider by 4 times, one-to-two monitoring power divider includes parallel resistance load network of printed board welding resistance and two-way monitoring power circuit of microstrip line, reduce the component variety of power divider, metal shell installs connector, the soldering pin of connector is welded with printed board, the signal of intercommunication inside and outside assembly.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of microwave technology, and particularly relates to a power divider technology. BACKGROUND

[0002] With the rapid development of satellite technology, the requirements for miniaturization, light weight and high power of on-board microwave equipment are becoming higher and higher. As a part of phased array radar, the power divider transmits signals and provides a detection loop. The commonly used power divider is miniaturized by using thin and light sheet material and microstrip line form. The thickness of the commonly used sheet material is about 0.5mm. In order to realize high power, an isolation resistor that can withstand high power is needed.

[0003] The existing technology has the following problems: the connector end face is relatively close to the radio frequency ground, and the thin sheet material is prone to micro-discharge phenomenon; the directivity of the conventional directional coupler is low, basically 0, which is not conducive to system monitoring; the isolation resistor selected by the conventional Wilkinson power divider is relatively large in size, which is prone to generate a large ground capacitance, affecting the circuit characteristics. SUMMARY

[0004] In order to solve the problems existing in the prior art, the present application provides a satellite-borne multi-way power divider assembly. In order to achieve the above purpose, the present application adopts the following technical scheme.

[0005] The assembly includes one one-to-four power divider and two mirror-symmetrical one-to-two monitoring power dividers, which are respectively installed on two sides inside the metal shell, protect the assembly, isolate the signal, save space, and reduce weight. The one-to-four power divider includes a parallel resistance isolation network composed of printed board soldering resistors and a four-way power dividing circuit composed of microstrip lines, which increases the withstand power of the power divider by 4 times. The one-to-two monitoring power divider includes a parallel resistance load network composed of printed board soldering resistors and a two-way monitoring power circuit composed of lines, which reduces the variety of components of the power divider. The metal shell is provided with connectors, the pins of the connectors are soldered to the printed board, and the signals inside and outside the assembly are communicated.

[0006] The four-way power dividing circuit of the one-to-four power divider includes five ports, and each port is provided with a suspended strip line with a characteristic impedance of 50 ohms. The inner conductor of the suspended strip line and the inner conductor of the four-way power dividing circuit are in communication, and the input and output ports of the four-way power dividing circuit are formed.

[0007] Further, the parallel resistance isolation network includes five printed lines a, b, c, e and f with a characteristic impedance of 50 ohms and four resistors with a resistance of 100 ohms. The printed line b is a U-shaped 1 / 2 wavelength, and the two ends thereof respectively extend printed lines e and f, the lengths of which are adjustable, and are connected to a large area ground through two parallel resistors with a resistance of 100 ohms. The printed lines a and c are 1 / 4 wavelength, one end of each of which is connected to the two ends of the printed line b, and the other end of each of which is connected to two internal inflection points of the four-way power dividing circuit.

[0008] The two-way monitoring power dividing circuit of the one-to-two power divider comprises four ports, each port is provided with a suspended strip line with a characteristic impedance of 50 ohms, the inner conductor of the suspended strip line is communicated with the inner conductor of the two-way monitoring power dividing circuit, and the input and output ports of the two-way monitoring power dividing circuit are formed.

[0009] Further, the parallel resistance load network comprises one section of printed line with a characteristic impedance of 50 ohms and two 100-ohm resistors, one end of the printed line is connected to the internal inflection point of the two-way monitoring power dividing circuit, and the other end is connected to the large-area ground through the two 100-ohm parallel resistors.

[0010] The printed board comprises upper and lower copper foils and an intermediate dielectric layer, the upper copper foil is etched with a printed line, the lower copper foil is connected to a metal shell, and a section of copper foil is removed from the port of the lower copper foil; a slot with a corresponding length is milled on the printed board at the position where the metal shell is mounted to the connector, and the suspended strip line mode is formed by the upper copper foil, the intermediate dielectric layer and the air cavity, so as to increase the distance between the inner and outer conductors and enhance the anti-micro-discharge capability.

[0011] The one-to-two monitoring power divider has the following advantages: the parallel resistance isolation network increases the power resistance of the power divider by 4 times, the coupler and the high-impedance line increase the directivity of the directional coupler from 5 dB to 15 dB, the output structure of the suspended strip line increases the gap and enhances the anti-micro-discharge capability of the multi-way power divider combination, when the relationship between the "gap voltage" and the "frequency-gap product" falls in the micro-discharge sensitive area, the frequency-gap product becomes larger, the distance from the sensitive area is increased, the micro-discharge phenomenon is avoided, the 100-ohm load resistance network serves as the load of the coupler, the variety of components is reduced, the cost is lowered, and the reliability of the system is improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a power divider cross section, Figure 2 is a one-to-four power divider layout, Figure 3 is a parallel resistance network layout, Figure 4 is a one-to-two monitoring power divider layout, Figure 5 is a parallel load network layout, Figure 6 is a simulation curve.

[0013] Mark: 2-connector, 3-suspended strip line, 4-resistor, 5-two-way monitoring power dividing circuit, 6-metallized via, 7-gap, 8-upper copper foil, 9-intermediate dielectric layer, 10-lower copper foil, 11-soldering pin, 13-slot, 14-metal shell, 15-air cavity, 17-four-way power dividing circuit, 18, 19-large-area ground, 20, a, b, c, e, f-printed line, G1, G2, G3-internal inflection point, P1, P2, P3-end point. DETAILED DESCRIPTION

[0014] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.

[0015] The solder pins 11 of connector 2 pass through the metal housing 14 and are soldered to the printed circuit board. A 1mm notch 7 is removed from the port of the lower copper foil 10, as shown. Figure 2 and 4 As shown, a 1mm groove 13 is milled out of the metal housing 14, which together with the upper copper foil 8 of the etched printed line, the intermediate dielectric layer 9, and the air cavity 15 form a suspended strip pattern.

[0016] The front of the 1-to-4 power divider has a printed four-way power divider circuit 17, with 5 ports in total: 2 on the left and 2 on the right, and 1 at the bottom. A 1mm long floating strip 3 is provided. Figure 2 As shown, other areas and the large area on the back are grounded 18. The two internal inflection points G1 and G2 of the four-way power divider circuit 17 are connected to one end P1 of printed line a and one end P2 of printed line c, respectively. The other ends of printed lines a and c are connected to the two ends of the U-shaped printed line b, respectively, extending into printed lines e and f, which are connected to the large area ground 18 through two 100-ohm parallel resistors 4. Figure 3 As shown, printed lines a, b, c, e, f and four 100-ohm resistors 4 form a parallel resistor isolation network.

[0017] Two dual-channel monitoring power dividers are mirror-symmetrically connected. A dual-channel monitoring power divider circuit 5 is printed on the front, with four ports. A 1mm long floating strip 3 is provided. Figure 4 As shown, other areas and the large-area grounding 19 on the back are connected through metallized vias 6. The internal inflection point G3 of the dual-channel monitoring power divider circuit 5 is connected to one end P3 of the printed line 20. The other end of the printed line 20 is connected to the large-area grounding 19 through two 100-ohm parallel resistors 4. Figure 5 As shown, printed line 20 and two 100-ohm parallel resistors 4 constitute a parallel resistor load network.

[0018] A comparison of the directional simulation curves of the directional coupler designed using this method and a conventional directional coupler is shown below. Figure 6 As shown, the orientation has been significantly improved.

[0019] The above are embodiments of the present invention and do not limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention are included within the protection scope of the present invention.

Claims

1. A spaceborne multiplexer assembly, characterized in that, include: One 1-to-4 power divider and two mirror-symmetrically connected 1-to-2 monitoring power dividers are installed on opposite sides of the interior of a metal housing. The 1-to-4 power divider comprises a parallel resistor isolation network formed by printed circuit board soldering resistors and a four-way power divider circuit formed by microstrip lines, increasing the power handling capacity by four times. The 1-to-2 monitoring power divider comprises a parallel resistor load network formed by printed circuit board soldering resistors and a two-way monitoring power divider circuit formed by microstrip lines, reducing the variety of components. Connectors are mounted on the metal housing, with connector pins soldered to the printed circuit board to connect signals inside and outside the component. The four-way power divider circuit includes: 5 ports, each port equipped with a floating strip with a characteristic impedance of 50 ohms. The inner conductor of the line is connected to the inner conductor of the four-way power divider circuit, forming the input and output ports of the four-way power divider circuit; the two-way monitoring power divider circuit includes: 4 ports, each port is provided with a floating strip with a characteristic impedance of 50 ohms, the inner conductor of the floating strip is connected to the inner conductor of the two-way monitoring power divider circuit, forming the input and output ports of the two-way monitoring power divider circuit; the printed circuit board includes: upper and lower copper foil layers and an intermediate dielectric layer, the upper copper foil is etched with printed lines, the lower copper foil is connected to a metal shell, a section of copper foil is removed from the port of the lower copper foil, and the metal shell is milled with a groove of corresponding length at the position where the connector is installed, forming a floating strip pattern with the upper copper foil, the intermediate dielectric layer dielectric, and the air cavity.

2. The spaceborne power divider assembly according to claim 1, characterized in that, The parallel resistor isolation network includes: five printed lines a, b, c, e, and f with a characteristic impedance of 50 ohms and four 100-ohm resistors. Printed line b is a U-shape with a half wavelength, and printed lines e and f extend from both ends respectively. The lengths are adjustable and they are connected to a large-area ground through two 100-ohm parallel resistors. Printed lines a and c are 1 / 4 wavelength, with one end connected to both ends of printed line b respectively, and the other end connected to the two internal inflection points of the four-way power divider circuit respectively.

3. The spaceborne multiplexer assembly according to claim 1, characterized in that, The parallel resistor load network includes: a printed line with a characteristic impedance of 50 ohms and two 100-ohm resistors. One end of the printed line is connected to the internal inflection point of the two-way monitoring power divider circuit, and the other end is connected to a large-area ground through the two 100-ohm parallel resistors.

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