Chip resistor impedance and standing-wave ratio frequency characteristic measuring device and method

Abstract

The invention discloses a chip resistor impedance and standing-wave ratio frequency characteristic measuring device and method. The measuring device comprises a microstrip line circuit, the terminal end of which is loaded with chip resistors, a microstrip line circuit, the terminal end of which is short-circuited and a network vector analyzer. The input impedance of the microstrip line circuit, the terminal end of which is loaded with the chip resistors and the input impedance of the microstrip line circuit, the terminal end of which is short-circuited are measured through the network vector analyzer; furthermore, the impedance ZL of the chip resistors is calculated; and standing-wave ratio of the chip resistors is calculated according to the ZL. The microstrip line circuit, the terminal end of which is loaded with the chip resistors and the microstrip line circuit, the terminal end of which is short-circuited are combined to calculate the impedance and standing-wave ratio frequency characteristic and the standing-wave ratio of the chip resistors, so that a part of influence of electromagnetic wave reflection introduced by a measuring circuit can be counteracted, and the measuring result is more reliable.

Description

technical field [0001] The invention relates to the field of radio frequency microwave technology, in particular to a device and method for measuring the impedance and standing wave ratio frequency characteristics of a chip resistor in the radio frequency field. Background technique [0002] With the application and continuous development and improvement of microelectronic circuits and surface mount technology (SMT), the resistor industry as a whole is showing a trend towards chip and miniaturization. To miniaturize electronic equipment, the first thing to consider is the miniaturization of electronic components. Chip type and miniaturization have become the main development direction of resistance components in recent years. [0003] In order to reduce the cost and improve the precision of resistance value, laser trimming is generally used for chip resistors to make the chip resistors reach the expected resistance value on DC. [0004] The resistance value given on the ch...

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Problems solved by technology

The main disadvantage of this approach is that the data obtained from the equivalent circuit diagram and 3D modeling simulation are approximate results, which are suitable as reference data

[0008] 2. The components of this microwave fixture require high precision, the manufacturing process is very demanding, and the manufacturing cost is very expensive

[0009] 3. The compactness of the connection between the microwave measuring fixture and the chip resistor is also a shortcoming. It is better to solder the chip resistor directly to the circuit board to make it more closely connected.

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