A Differential Pair Interface Based on Circulator

A differential pair and line interface technology, which is applied in the direction of waveguide devices, circuits, electrical components, etc., can solve the problems of unsuitable miniaturization and high integration, high production and development costs, large circuit area, etc., and achieve compact structure, The form is simple, ensuring the effect of the overall structure

Active Publication Date: 2021-07-23
ANHUI SUN CREATE ELECTRONICS
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Problems solved by technology

The interconnection between the traditional 50Ω single-ended interface and the differential signal is realized by means of differential amplifier circuit or single-ended-differential converter. On the one hand, this kind of method has a large circuit area, which is obviously not suitable for the increasingly small In the design of highly integrated and highly integrated products; on the other hand, the structure is also relatively complex, which brings high production and development costs

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  • A Differential Pair Interface Based on Circulator
  • A Differential Pair Interface Based on Circulator
  • A Differential Pair Interface Based on Circulator

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Embodiment Construction

[0029] For ease of understanding, the specific implementation structure and workflow of the present invention are described below in conjunction with the accompanying drawings:

[0030] Concrete structure of the present invention, as Figure 1-2 As shown, it includes a dielectric plate 50 as a carrier. One side of the dielectric board 50 is covered with copper, while the other side is provided with a cavity structure; the cavity structure is covered with a structure such as figure 1 The planar microstrip plate a. The main structure of the planar microstrip board a includes a microstrip hybrid ring 10 , a 50Ω surface mount resistor 20 , a matching balun 40 and a differential pair 30 . Among them: refer to figure 2 As shown, the radio frequency signal is input by the microstrip hybrid ring 10, that is figure 2 The port ④ in the input is turned into an equal-amplitude anti-phase signal, and then the two output terminals are figure 2 The middle port ② and port ③ are finall...

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Abstract

The invention belongs to the field of PCB circuit design, in particular to a differential pair interface based on a circulator. The differential pair interface includes a microstrip hybrid ring, the input terminal of the microstrip hybrid ring is connected to a 50Ω RF port, and the isolation terminal of the microstrip hybrid ring is connected to a 50Ω surface mount resistor; the differential pair interface also includes a differential pair line, forming a differential pair The input port of each microstrip line of the line is connected to the microstrip hybrid ring via a matching balun: the microstrip hybrid ring, 50Ω surface mount resistor, matching balun, and differential pair are attached to one side of the dielectric board , the other side of the dielectric board is covered with copper; the dielectric board is provided with an air cavity. The invention has compact structure and high working reliability, not only can directly convert the radio frequency signal into a differential signal on the PCB board, so as to be sent to the required integrated chip, but also can ensure the compactness and simplification of the overall structure, In order to meet the application requirements of increasingly miniaturized and integrated products.

Description

technical field [0001] The invention belongs to the field of PCB circuit design, in particular to a differential pair interface based on a circulator. Background technique [0002] In traditional wireless transceiver designs, 50Ω single-ended interfaces are widely used in RF and IF circuits, while in modern transceiver designs, differential interfaces are often used in high-frequency circuits for better performance. A single-ended signal is an unbalanced signal, measured by the difference between the signal and a fixed reference point; once a source of error is introduced into the signal path, problems can arise. Therefore, single-ended signals are susceptible to noise and electromagnetic coupling interference. Differential signals consist of pairs of balanced signals that are equal in magnitude and opposite in phase; the difference between the positive and negative balanced signals corresponds to the composite differential signal. If an error is introduced into a differen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/38
CPCH01P1/38
Inventor 李霞孙浩胡卫东高静侯艳茹袁士涛吴莹莹
Owner ANHUI SUN CREATE ELECTRONICS
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