Measuring apparatus and measuring method of multichannel S parameter

Abstract

The invention discloses a measuring apparatus of multichannel S parameter. The measuring apparatus of multichannel S parameter is arranged between a double port vector network analyzer and a device tobe measured for measuring the device with a plurality of ports, wherein when the number of the ports is an even number, the measuring apparatus of multichannel S parameter includes two single-pole N-throw switches and N double-pole double-throw switches DPDT and N>=2; when the number of the ports is an odd number, that is, the number of the ports is 2N+1, the measuring apparatus of multichannel Sparameter includes one single-pole N-throw switch, a single-pole N+1-throw switch and N double-pole double-throw switches DPDT; each double-pole double-throw switch includes two channels; the single-pole N-throw switch includes N input ports and one output port; the output port of the single-pole N-throw switch is connected with one port of the double port vector network analyzer; each input portof the single-pole N-throw switch is connected with one channel of the corresponding double-pole double-throw switch DPDT; and the input port of the channel is connected with one port of the device to be measured. The measuring apparatus of multichannel S parameter is simple in structure and low in cost.

Description

technical field [0001] The invention belongs to the field of radio frequency automatic testing, in particular to a multi-channel S-parameter measuring device and a measuring method. Background technique [0002] With the development of communication technology, people's requirements for the performance of communication devices are constantly improving, and the use of multi-port devices is becoming more and more common and frequent. Correspondingly, people have more and more requirements for testing multi-port devices, and their dependence on automated test equipment is also getting stronger. [0003] At present, multi-port vector network analyzers (VNA) are generally used in the industry to test multi-port devices. Multi-port vector network analyzers (VNA) are two / four ports. Parameter amplitude and phase can be measured, and the vector network analyzer can display test data with Smith chart, which is convenient for engineering application and debugging. The vector network...

AI Technical Summary

Problems solved by technology

If traditional equipment is used for measurement, it is necessary to construct a cumbersome switch matrix, such as figure 1 As shown, not only the cost of testing is high, but also the efficiency is low, which is far from meeting the actual needs

Moreover, the test methods in the prior art are cumbersome and time-consuming, and the technicians have to generate the test logic according to the situation on site, which wastes a lot of time

[0005] Some companies have invested a lot of energy in the research and development of multi-port vector network analyzers, increasing the test efficiency by increasing the input ports of the network analyzer, but the cost of the equipment is very high and the practicability is poor

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