CN-224217316-U - Integrated channel isolation radio frequency transformer module

CN224217316UCN 224217316 UCN224217316 UCN 224217316UCN-224217316-U

Abstract

The utility model discloses an integrated channel isolation radio frequency transformer module, which belongs to the technical field of radio frequency transformers, and specifically comprises a PCB (printed circuit board), radio frequency transformer modules and a metal shielding shell, wherein the radio frequency transformer modules of a plurality of channels are arranged side by side in the length direction of the PCB, the metal shielding shell is provided with a containing cavity with an opening at the lower end, the containing cavity is provided with a plurality of metal partition boards with the same interval to form a plurality of isolation cavities, the plurality of metal partition boards are arranged along the length direction of the PCB, each isolation cavity contains one radio frequency transformer module, and the PCB is provided with an input pad and an output pad corresponding to each channel radio frequency transformer module. The utility model improves the isolation of two adjacent channels, avoids crosstalk between the two channels, and is beneficial to realizing miniaturization.

Inventors

ZHOU HONG
WANG YONG

Assignees

贵阳顺络迅达电子有限公司

Dates

Publication Date: 20260508
Application Date: 20250526

Claims (4)

1. The utility model provides an integrated passageway keeps apart radio frequency transformer module, a serial communication port, including PCB board (1), radio frequency transformer module (2) and metal shielding shell (3), be provided with radio frequency transformer module (2) of a plurality of passageways side by side on PCB board (1) length direction, metal shielding shell (3) are provided with lower extreme open-ended and hold the chamber, it is provided with the same metal baffle (4) of polylith interval and forms a plurality of isolation chamber (5) to hold the chamber, polylith metal baffle (4) are arranged along PCB board (1) length direction, every isolation chamber (5) holds a radio frequency transformer module (2), PCB board (1) are provided with input pad (6) and output pad (7) that correspond every passageway radio frequency transformer module (2).
2. The integrated channel isolation radio frequency transformer module according to claim 1, wherein each radio frequency transformer module (2) comprises a ferrite core (201), an enameled wire (202) and an isolation capacitor (203), the enameled wire (202) is wound on the ferrite core (201), the free end of the enameled wire (202) is electrically connected to an enameled wire pad (204) by adopting a first high-temperature tin layer, the ferrite core (201) is bonded on the PCB board (1) by adopting an epoxy resin layer, and the isolation capacitor (203) is electrically connected to a capacitor pad (205) by adopting a second high-temperature tin layer.
3. An integrated channel isolation radio frequency transformer module according to claim 1, characterized in that one end of the opening of the metal shielding shell (3) is provided with two positioning plug-in parts (301), the PCB board (1) is provided with two positioning plug-in holes (101) corresponding to the positioning plug-in parts (301), and the two positioning plug-in parts (301) are plugged into the two positioning plug-in holes (101).
4. The integrated channel isolation radio frequency transformer module according to claim 1, wherein a metal isolation frame (8) corresponding to one circle of the bottom of each isolation cavity (5) is arranged on the PCB (1), and the metal isolation frame (8) is fixedly connected with the isolation cavities (5) through high-temperature tin.

Description

Integrated channel isolation radio frequency transformer module Technical Field The utility model relates to an integrated channel isolation radio frequency transformer module, and belongs to the technical field of multichannel radio frequency transformers. Background The radio frequency transformer is a transformer specially designed for processing high-frequency signals, and has the core functions of realizing key functions such as impedance matching, signal coupling, voltage transformation, isolation, power transmission and the like in a high-frequency circuit. In order to meet the requirement of miniaturization, the ADC and DAC chips are generally a plurality of channels (5, 8, 10, 16, etc.), a large number of radio frequency transformers are needed for each channel at the front end of the ADC and the rear end of the DAC, isolation requirements are met among the channels, crosstalk can be generated among the transformers due to the magnetic field of the radio frequency transformer core, the isolation between the channels can be influenced by the distance between the two transformers, the isolation degree can be reduced if the radio frequency transformers of the two channels are placed too close, the crosstalk can be generated between the two channels, and the space occupation can be large and the equipment can be influenced if an isolation shell is additionally arranged. Disclosure of utility model The utility model aims to solve the technical problem of providing an integrated channel isolation radio frequency transformer module, which improves the isolation degree of two adjacent channels, avoids crosstalk between the two channels and is beneficial to realizing miniaturization. The technical scheme includes that the integrated channel isolation radio frequency transformer module comprises a PCB, radio frequency transformer modules and a metal shielding shell, wherein the radio frequency transformer modules of a plurality of channels are arranged side by side in the length direction of the PCB, the metal shielding shell is provided with a containing cavity with an opening at the lower end, the containing cavity is provided with a plurality of metal partition boards with the same interval to form a plurality of isolation cavities, the plurality of metal partition boards are arranged along the length direction of the PCB, each isolation cavity contains one radio frequency transformer module, and the PCB is provided with an input bonding pad and an output bonding pad corresponding to each channel radio frequency transformer module. Further, each radio frequency transformer module comprises a ferrite core, an enameled wire and an isolation capacitor, wherein the enameled wire is wound on the ferrite core, the free end of the enameled wire is electrically connected to an enameled wire bonding pad through a first high-temperature tin layer, the ferrite core is bonded on a PCB (printed circuit board) through an epoxy resin layer, and the isolation capacitor is electrically connected to a capacitor bonding pad through a second high-temperature tin layer. Further, two positioning plug-in parts are arranged at one end of the opening of the metal shielding shell, two positioning jacks corresponding to the positioning plug-in parts are arranged on the PCB, and the two positioning plug-in parts are plugged into the two positioning jacks. Further, a metal isolation frame corresponding to one circle of the bottom of each isolation cavity is arranged on the PCB, and the metal isolation frame is fixedly connected with the isolation cavity through high-temperature tin. Compared with the prior art, the multi-channel radio frequency transformer module is integrated on one PCB, and the metal shielding shell with the partition plate is adopted to form the independent isolation cavity to realize physical isolation of each radio frequency transformer module, so that the isolation degree between channels is improved, crosstalk between channels is avoided, adjacent radio frequency transformer modules can be arranged closer under the condition of avoiding crosstalk, the multi-channel radio frequency transformer module is more compact, the structure is smaller, the miniaturization is convenient to realize, and the size can be reduced by more than half. Drawings FIG. 1 is a schematic diagram of a three-dimensional structure of an integrated channel isolation RF transformer module; FIG. 2 is a schematic diagram of a front view of an integrated channel isolation RF transformer module; FIG. 3 is a schematic view of the cross-sectional structure A-A of FIG. 2; FIG. 4 is a schematic top view of an integrated channel isolation RF transformer module (with the metal shielding case removed); FIG. 5 is a schematic view of the bottom perspective of the metallic shield can; FIG. 6 is a pin layout of an integrated channel isolation RF transformer module; FIG. 7 is a functional schematic of an integrated channel isolation RF transformer module;