Device and method for measuring impedance and standing wave ratio frequency characteristics of chip resistor
A measuring device and resistor technology, applied in the field of radio frequency microwaves, can solve the problems of insufficient compactness of the connection between a microwave measuring fixture and a chip resistor, high precision requirements for microwave fixture components, and high manufacturing process requirements, so as to achieve reliable measurement results and reduce Parasitic inductance effect, accurate input impedance effect
Inactive Publication Date: 2019-01-22
GUANGDONG UNIV OF TECH
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
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.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0028] The measurement method of the present invention uses two circuits, one is a microstrip line circuit with a terminal loading resistance, and the other is a microstrip line circuit with a terminal short circuit. Microstrip line circuit with terminal loading resistance: chip resistors are connected to the end of the microstrip line, and the resistance value of the chip resistors greater than 50Ω is as close as possible to 50Ω in parallel, and the chip resistors are placed at equal intervals at the end of the microstrip line ; For chip resistors less than 50Ω, do not do connection processing, directly place a resistor in the middle of the end of the microstrip line. Microstrip line circuit with terminal short-circuit: the microstrip line should be equal in length and width to the microstrip line of the terminal loading resistor, and the end of the microstrip line is connected to a small microstrip line that is consistent with the total length and width of the terminal loadin...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More 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...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/02
CPCG01R27/02
Inventor 曾柳杏林福民张逸松
Owner GUANGDONG UNIV OF TECH