A ferrite phase shifter magnetic core temperature detection device and detection method

Abstract

The invention discloses a ferrite phase shifter magnetic core temperature detection device and detection method. The temperature detection device includes a ferrite with an excitation coil, a ferrite drive circuit, a comparator circuit and a controller; The body drive circuit is used to change the direction of the excitation current in the ferrite body, and samples the excitation current to output the sampling voltage Vs; the comparator circuit is used to set two reference voltages for comparison with the sampling voltage, and output the comparison result to be processed by the controller. The invention proposes a new temperature detection method, which solves the problem that the temperature of the magnetic core of the ferrite phase shifter is difficult to collect and the problem of magnetic core temperature compensation; the ferrite only needs one excitation coil, compared with the double coil The excitation simplifies the structure of the device and the excitation circuit, and improves the reliability; real-time monitoring, with a response speed of microseconds; it can be widely used in the core temperature detection and monitoring of microwave ferrite switches, microwave ferrite phase shifters and other products. compensate.

Description

technical field [0001] The invention relates to the field of microwave devices, in particular to a ferrite phase shifter magnetic core temperature detection device and detection method. Background technique [0002] The hysteresis loop of ferrite material will change a lot with the change of temperature, so the phase shifter made of ferrite has certain temperature characteristics, which will lead to the change of microwave index when the temperature changes, In severe cases, it will affect the normal operation of the entire system. Therefore, it is necessary to analyze the temperature characteristics of the ferrite phase shifter and find a solution to improve the temperature stability of the phase shifter. In order to perform temperature compensation on the ferrite phase shifter, the first step needs to accurately collect the temperature of the ferrite core. [0003] The traditional temperature compensation schemes are as follows: 1. Embedding a temperature sensor near the...

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Problems solved by technology

[0003] The traditional temperature compensation schemes are as follows: 1. Embedding a temperature sensor near the ferrite core; the disadvantage is that there is a certain distance between the embedded temperature sensor and the ferrite core, and the temperature of the core cannot be accurately collected. It can collect local temperature; embedding temperature sensors requires additional hardware, which increases the complexity of the circuit and structure

2. Magnetic flux feedback compensation, which is compensated by detecting the change of magnetic flux with temperature; the disadvantage is that the ferrite needs to wear double coils, that is, the excitation coil and the magnetic flux feedback coil, which increases the complexity of the product structure , which reduces the performance index of the product; the magnetic flux needs to be integrated on the circuit, which increases the complexity of the circuit, and the delay is serious

[0004] There are various problems in the traditional temperature compensation scheme, so a new method with simple structure, which can solve the problem of difficult temperature acquisition of ferrite core and solve the problem of temperature compensation of ferrite phase shifter core is needed

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