Radio frequency circuit with resistor replaced by character-shaped wiring

Abstract

The invention provides a radio frequency circuit with a character-shaped wiring replacing a resistor, which is used for replacing the resistor, and the resistor has a first equivalent impedance at a radio frequency. The radio frequency circuit comprises a wiring layer and a grounding layer, wherein the wiring layer comprises a first bonding pad, a second bonding pad and a font wiring unit. The second bonding pad corresponds to the first bonding pad. The character-shaped wiring unit is connected between the first bonding pad and the second bonding pad and has a line width, and the line width is less than 50-ohm line width. The grounding layer is arranged below the wiring layer and is separated from the wiring layer by a height. The character-shaped wiring unit has a second equivalent impedance at the radio frequency, the second equivalent impedance is determined according to the line width, the height and the radio frequency, and the second equivalent impedance is the same as or similar to the first equivalent impedance. Therefore, the character-shaped wire can replace the entity resistor without influencing the high-frequency impedance matching.

Description

technical field [0001] The invention relates to a radio frequency circuit, in particular to a radio frequency circuit in which resistors are replaced by font wires. Background technique [0002] Since electronic products are getting smaller and smaller, and have different radio frequency (Radio Frequency; RF) technologies, and many different radio frequency components exist in the same system and will interfere with each other, multiple sets of matching circuits need to be reserved on the radio frequency circuit to solve the problem of interference and inconsistency. matching problem. If the reserved circuit is not used, a physical resistor is still required to connect the line. figure 1 A three-dimensional schematic diagram of an existing radio frequency circuit 100 with resistance is shown, which includes a first welding pad 200, a second welding pad 300 and a resistor 400, and the resistor 400 is connected between the first welding pad 200 and the second welding pad 300 ...

AI Technical Summary

Problems solved by technology

[0004] Therefore, the object of the present invention is to provide a radio frequency circuit in which a font-shaped trace replaces a resistor, which uses a font-shaped trace to connect two solder pads (i.e., footprints, Footprint) structures, and the corresponding ground plane, Create high-frequency inductance characteristics similar to physical resistance, which can improve the high-frequency impedance influence of general existing traces, and solve the problem of impedance mismatch in the prior art

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