A method of manufacturing a planar microstrip inductance coil

Abstract

The invention relates to a planar microstrip inductance coil and a manufacturing method thereof, and aims to provide a planar microstrip inductance coil with a small occupied area, low manufacturing cost and accurate inductance value and a manufacturing method thereof. A planar microstrip inductance coil includes a printed circuit board and a copper-clad strip, and the planar microstrip inductance coil is attached to the printed circuit board in the shape of several circles of circular planar spirals wound by the copper-clad strip. The production method includes: for the required characteristic impedance value Z0 of the microstrip line, select the PCB material, determine the dielectric constant εr, and calculate the phase velocity vp and wavelength λ of the strip line; determine the reference spiral copper-clad coil in the computer, And etch on the PCB board, measure its real characteristic impedance and inductance value; deduce and correct from the characteristic impedance, get the benchmark calculation formula of accurate inductance value and characteristic impedance, and recalculate the width w and Wavelength λ; Distribute the spiral microstrip coil on the selected PCB board and etch it out.

Description

technical field [0001] The invention relates to an inductance coil, in particular to a planar microstrip inductance coil arranged on a PCB board and a manufacturing method thereof. Background technique [0002] At present, when it is necessary to use low-value precision inductance, the common practice in the industry is: 1. Use the inductance semiconductor chip whose nominal value is closest to the current demand value; 2. Use the serpentine microstrip line etched on the printed circuit board to Realize micro-inductance. The primary disadvantage of the above-mentioned first solution is that the cost is relatively high, and a large amount of raw materials need to be consumed at the same time. As the most important component in the design of radio frequency signal circuits, micro-value inductors are widely used and used in large quantities. If all inductor chips are used, the product cost will be quite high and consume a large amount of semiconductor raw materials. Secondly...

AI Technical Summary

Problems solved by technology

Today, the design of electronic products is becoming more and more compact. If only the design of an inductor needs to occupy the area of ​​more than one single-chip microcomputer chip on the PCB, it is obviously not acceptable in terms of the economy of its design and the aesthetics of the product. accepted

At the same time, due to the design of the serpentine line, the signal flow direction of the RF signal in the upper and lower layers of the serpentine line is just opposite. When the RF signal flows in the microstrip line, a relatively large mutual inductance effect will be generated, resulting in the inductance of the microstrip line. There is a large deviation between the design value and the actual value, causing serious debugging difficulties

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