Microwave power testing device based on universal serial bus (USB) interface

Abstract

The invention discloses a microwave power testing device based on a universal serial bus (USB) interface. The microwave power testing device comprises a casing, a circuit board support, a microwave sensor, an analog circuit board and a digital circuit board, wherein the analog circuit board and the digital circuit board are connected through a high-density connector, the analog circuit board comprises a chopping amplifying circuit, a rear-stage amplifying circuit, an analog-to-digital converting circuit, a zero calibration selection circuit and a temperature analog-to-digital converting circuit, the digital circuit board comprises a digital signal processing circuit, a USB interface circuit and a power source management circuit, and the digital signal processing circuit comprises a digital signal processor, a synchronous dynamic data storer, a flash memory program storage and a complicated programmable logic array chip. The microwave power testing device is compact in structure, small in size, light in weight and flexible in programming, adopts USB power supply, can be connected with computers with USB host interfaces or other electronic measuring instruments, can form a microwave power automatic testing system rapidly and is suitable for applications in places of laboratories, fields, production lines and the like.

Description

technical field [0001] The invention relates to a microwave power testing device, in particular to a microwave power testing device based on a USB interface. Background technique [0002] In the field of microwave power testing, the common microwave power testing device adopts the following test scheme: first, the microwave signal is converted into a weak DC voltage signal through the power probe, and after preliminary amplification, the analog signal is transmitted to the power meter through a multi-core cable The host, the power meter host performs post-stage amplification and filtering on the signal, converts it into a digital signal, and then completes the calibration and compensation of the signal by the DSP, and then reads the processed digital signal by the CPU (central processing unit) in the host, and directly through the display interface Displayed on the host screen, or interact with other control instruments through serial ports, GPIB (General Purpose Interface B...

AI Technical Summary

Problems solved by technology

Due to the large size of the power test host, it needs to occupy a large space in the cabinet when building the test system, and generally requires 220V power supply, and requires program-controlled interfaces such as GPIB, serial port, or network port. The connection is cumbersome and inconvenient to carry, so generally It is limited to laboratory use, not suitable for on-site debugging, monitoring and production line use; and when multiple adjacent power ports need to be tested, multiple power meter hosts, cables and power probes need to be used at the same time, which takes up more space. Program-controlled connections are more cumbersome and costly

[0004] Therefore, in terms of system setup, on-site testing, production line testing, multi-channel testing, etc., there are many inconveniences in the existing microwave power testing device with desktop structure.

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