CN-116799466-B - Four-way power divider and manufacturing method thereof

CN116799466BCN 116799466 BCN116799466 BCN 116799466BCN-116799466-B

Abstract

The invention discloses a four-way power divider and a manufacturing method thereof, wherein the four-way power divider comprises an LTCC integrated substrate, a ferrite magnetic core, enamelled wires, epoxy resin and a shell, wherein the ferrite magnetic core is three, the three magnetic core coils are formed by winding the enamelled wires, the three magnetic core coils are adhered to the LTCC integrated substrate through the epoxy resin, the leading-out ends of the enamelled wires are connected to the LTCC integrated substrate, the shell is covered on the LTCC integrated substrate and sealed by the epoxy resin, and the LTCC integrated substrate is integrated with the resistor and the capacitor of the four-way power divider. The invention integrates the resistor and the capacitor on the LTCC substrate, reduces the product size, improves the operability of the product process, eliminates the welding of surface components, avoids the falling phenomenon of the components in the secondary reflow soldering of the product, and prevents the falling of the virtual soldering of the soldering points after the lead-out end of the enameled wire is welded on the soldering pad of the LTCC substrate, and then the soldering point is subjected to tin plating treatment by high-temperature tin and covered by tin.

Inventors

WANG YONG
JIANG GUOYI
HUANG YONGFEN

Assignees

贵阳顺络迅达电子有限公司

Dates

Publication Date: 20260508
Application Date: 20230726

Claims (8)

1. The four-way power divider is characterized by comprising an LTCC integrated substrate (1), a ferrite magnetic core (2), enamelled wires (3), epoxy resin (4) and a shell (5), wherein the ferrite magnetic core (2) is three, all the enamelled wires (3) are wound to form three magnetic core coils, the three magnetic core coils are adhered to the LTCC integrated substrate (1) through the epoxy resin (4), the leading-out ends of the enamelled wires (3) are connected to the LTCC integrated substrate (1), the shell (5) is covered on a bonding pad (7) of the LTCC integrated substrate (1) and is sealed by the epoxy resin (4), and the LTCC integrated substrate (1) is integrated with three resistors and two capacitors of the four-way power divider; The circuit structure comprises a first inductance group, a second inductance group, a third inductance group and a fourth inductance group, wherein the first inductance group is connected to a signal input end, a tap of the second inductance group is connected to a tap of the first inductance group, two ends of the second inductance group are connected with a first resistor in parallel, two ends of the second inductance group are respectively connected to a tap of the third inductance group and a tap of the fourth inductance group, two output ends of the third inductance group and the fourth inductance group are respectively connected with a second resistor and a third resistor in parallel, the tap of the third inductance group and the tap of the fourth inductance group are also connected with a first capacitor and a second capacitor in parallel, and two ends of the second resistor and the third resistor are four signal output ends.
2. The four-way power divider according to claim 1, wherein the lead-out end of the enameled wire is welded to the bonding pad of the LTCC integrated substrate (1) by high-temperature tin (6).
3. A four-way power divider according to claim 1, wherein the first inductor group comprises two inductors connected in series, one end of the two inductors connected in series is a signal input end, the other end of the two inductors is grounded, and a tap between two adjacent inductors is connected to a tap of the second inductor group.
4. A four-way power divider according to claim 1, wherein the second inductor group comprises two inductors connected in series.
5. A four-way power divider according to claim 1, wherein the third inductor group and the fourth inductor group each comprise two inductors connected in series.
6. A four-way power divider according to claim 1, wherein the first inductor group, the second inductor group, the third inductor group and the fourth inductor group are wound in a double-wire manner.
7. A manufacturing method of a four-way power divider is characterized in that an LTCC low-temperature co-firing ceramic technology and a process are used, two capacitors and three resistors in a circuit are integrated on a substrate, a bonding pad for connecting input and output of the four-way power divider is designed on an LTCC integrated substrate (1), a ferrite magnetic core (2) is adhered to the LTCC integrated substrate (1) through epoxy resin (4) and cured at a high temperature, an enameled wire (3) with double wire edges is wound on the ferrite magnetic core (2), a lead-out end of the enameled wire is welded on the bonding pad of the LTCC integrated substrate (1) through an electronic spot welder, welding treatment is carried out through high-temperature tin, and sealing treatment is carried out on the four-way power divider through a shell (5) and the epoxy resin (4).
8. A method for manufacturing a four-way power divider according to claim 7 is characterized in that the four-way power divider is sealed by using epoxy resin to completely seal the periphery of one end of an opening of a shell on a substrate, the epoxy resin used for sealing needs to be sealed twice, the epoxy resin is firstly dispensed on the substrate in a dispensing mode according to the size of an outer frame of the shell, vent holes with the size of 2-3mm are reserved, the shell is assembled on the substrate, the periphery of the shell is sealed again by using the epoxy resin, the vent holes are reserved and cannot be sealed, then the packaging product with the vent holes reserved is completely cured at high temperature, the packaging product with the vent holes reserved after the first processing is finished is heated on a heating table for more than 10 minutes, the air inside the shell is completely discharged after the heating until the air inside the shell does not thermally expand, the epoxy resin is used for sealing the vent holes, the product is continuously placed on the heating table for epoxy resin curing, and the final packaging product is obtained, and the temperature of the heating table is the epoxy resin curing temperature.

Description

Four-way power divider and manufacturing method thereof Technical Field The invention relates to a four-way power divider and a manufacturing method thereof, belonging to the technical field of four-way power dividers. Background Along with the increasing requirements of equipment reliability and environmental adaptability, high-reliability miniaturized fully-sealed microwave devices are required to be used, service life, reliability and environmental adaptability of the equipment are guaranteed, four-way power dividers with the same size on the market are limited by circuit structures and sizes, full sealing cannot be achieved, the risk that cleaning liquid remains in products in the cleaning process after the power dividers are mounted, product failure is caused, the performance is influenced due to the fact that the conventional four-way power dividers are fully-sealed, three-proofing is carried out after the coil exposed microwave devices are mounted, and the three-proofing is not coated for the fully-sealed power dividers, so that the moistureproof capacity and service life of the whole machine are greatly reduced. Disclosure of Invention The invention aims to solve the technical problems of providing a four-way power divider and a manufacturing method thereof, solving the problems of miniaturization and full sealing of the four-way power divider, solving the problems that cleaning liquid remains in a product and cannot be prevented in the process of cleaning and three proofing after the whole machine is attached, and being capable of equally dividing one-way power signal into 4-way power signals in a wide frequency range and outputting the 4-way power signals. The technical scheme includes that the four-way power divider comprises an LTCC integrated substrate, ferrite magnetic cores, enamelled wires, epoxy resin and a shell, wherein the ferrite magnetic cores are three, the three magnetic core coils are formed by winding the enamelled wires, the three magnetic core coils are adhered to the LTCC integrated substrate through the epoxy resin, the leading-out ends of the enamelled wires are connected to bonding pads of the LTCC integrated substrate, the shell is covered on the LTCC integrated substrate and sealed by the epoxy resin, and the LTCC integrated substrate is integrated with resistors and capacitors of the four-way power divider. Further, the lead-out end of the enameled wire is soldered on the bonding pad of the LTCC integrated substrate by high-temperature soldering. Further, the four-way power divider further comprises a four-way power divider circuit structure, the four-way power divider circuit structure comprises a first inductance group, a second inductance group, a third inductance group and a fourth inductance group, the first inductance group is connected to the signal input end, the tap of the second inductance group is connected to the tap of the first inductance group, the two ends of the second inductance group are connected with a first resistor in parallel, the two ends of the second inductance group are respectively connected to the tap of the third inductance group and the tap of the fourth inductance group, the two ends of the output of the third inductance group and the two ends of the fourth inductance group are respectively connected with a second resistor and a third resistor in parallel, the tap of the third inductance group and the tap of the fourth inductance group are also connected with a first capacitor and a second capacitor in parallel, and the two ends of the second resistor and the third resistor are four-way signal output ends. Further, the first inductor group comprises two inductors connected in series, one end of the two inductors connected in series is a signal input end, the other end of the two inductors is grounded, and a tap between two adjacent inductors is connected to a tap of the second inductor group. Further, the second inductor group includes two inductors connected in series. Further, the third inductor group and the fourth inductor group each include two inductors connected in series. Further, the first inductor group, the second inductor group, the third inductor group and the fourth inductor group are wound in a double-wire mode. The method comprises integrating two capacitors and three resistors in a circuit onto a substrate by using LTCC low-temperature co-firing ceramic technology and process, designing and connecting input and output bonding pads of the four-way power divider on the LTCC integrated substrate, pasting a ferrite core onto the LTCC integrated substrate by using epoxy resin, curing at high temperature, winding enamelled wires with double-wire edges on the ferrite core, welding the leading-out ends of the enamelled wires onto bonding pads of the LTCC integrated substrate by using an electronic spot welder, welding the bonding pads by using high-temperature tin, and sealing the power divider by using a shell and the epoxy resin.