High-amplitude-phase-consistency teaching experiment module separating circuit

Abstract

The invention discloses a high-amplitude-phase-consistency teaching experiment module separating circuit, and the circuit consists of at least two separating channels. Each separating channel comprises an experiment input switch, an experiment input circuit, a module circuit separating switch, an experiment output circuit, and an experiment output switch. According to the invention, the circuit can enable each module unit circuit which needs to be used in the development of a teaching experiment to be separated from a signal link, enables the input and output ends of the each module unit circuit to be led to an experiment input interface and an experiment output interface, and forms a teaching experiment module which can select the switching and carry out the experiment independently. The high-amplitude-phase-consistency design enables all circuits of the teaching experiment module separating circuit to have the same electric length and amplitude-phase properties in an allowed error range, so as to correct the insertion loss and phase errors introduced by a separating circuit through a correction method.

Description

technical field [0001] The invention belongs to the field of teaching experiment devices and relates to a high-amplitude phase consistency teaching experiment module separation circuit. Background technique [0002] In the teaching activities of electronic and information engineering majors such as microwave engineering and communication engineering in colleges and universities, it is necessary to extract the unit circuits in the signal chain for experimental testing to help students deepen their understanding of relevant knowledge points and recognize related knowledge points. Unit circuit, master the engineering application of related unit circuit, so as to cultivate students' practical operation ability and engineering application ability. In prior art scheme, mainly have following shortcoming: [0003] 1. Extracting various unit circuits from the signal chain requires the introduction of experimental module separation circuits. The introduction of separation circuits wi...

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Problems solved by technology

[0003] 1. Extracting various unit circuits from the signal chain requires the introduction of experimental module separation circuits. The introduction of separation circuits will bring path loss and insertion phase, resulting in experimental test parameters that cannot truly characterize the characteristics of the separated unit circuits

[0004] 2. Due to the different positions of various unit circuits in the signal chain, the path length of each experimental separation circuit is different, the insertion loss and insertion phase are also different, and the amplitude and phase consistency is poor

[0005] 3. The insertion loss and phase error are also different, making it very difficult and difficult to use the calibration method to eliminate the influence of the insertion loss and phase error of the experimental separation circuit on the experimental test results

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