An Algorithm for Automatic Frequency Calibration of ESC Filters
A technology of electronically adjustable filters and algorithms, which is applied to electrical components, adaptive networks, impedance networks, etc., can solve problems such as center frequency deviation of electronically adjustable filters, reduce mechanical wear, improve frequency calibration efficiency, and frequency calibration results accurate effect
Active Publication Date: 2019-04-09
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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However, with the wear of the cavity of the filter device, the stepper motor drive, the tuning rod and other components during use and the change of the ambient temperature, the corresponding relationship between the number of pulses of the stepper motor and the frequency will change. The center frequency of the instrument deviates from the
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[0022] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0023] The invention provides an automatic frequency calibration algorithm of an electric tuning filter, including the composition of the electric tuning filter, the detection principle of the electric tuning filter, and the automatic frequency calibration algorithm flow of the electric tuning filter.
[0024] figure 1 Shown is the composition structure of the electronically adjustable filter, including the drive circuit, which is used to drive the stepper motor to rotate; the stepper motor adjusts the length of the tuning rod in the filter cavity through the drive device to perform tuning of the electronically adjustable filter; The device is used to generate a single carrier signal within the...
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The invention discloses an automatic frequency calibration algorithm for an electric tuning filter, and relates to the field of electric tuning filters. In the automatic frequency calibration algorithm of the present invention, the center frequency and passband bandwidth of the electric tuner filter are first detected; During calibration, the output signal level of the electronically adjustable filter is detected; finally, the frequency calibration result is confirmed according to the amplitude-frequency curve of the electronically adjustable filter, and the automatic frequency calibration of the electronically adjustable filter is completed. The present invention detects, stores and processes the output signal of the electric tuning filter through the detection equipment, obtains the amplitude-frequency curve of the electric tuning filter, and realizes the accurate and rapid detection of the electric tuning filter according to the amplitude-frequency curve of the electric tuning filter. Calibrate the frequency to solve the center frequency deviation problem caused by the wear and tear of the electric filter and the change of the ambient temperature. At the same time, it simplifies the debugging work of the electric filter and improves the work efficiency.
Description
technical field [0001] The invention belongs to the technical field of electronically adjustable filters, in particular to an automatic frequency calibration algorithm for electronically adjustable filters. Background technique [0002] The ESC filter is a filter whose center frequency can be continuously tuned within a certain frequency. It plays an important role in electronic countermeasures, radar and communication systems, and needs to carry a certain amount of power. It has frequency band division, frequency selection, suppression Functions such as interference and improving signal-to-noise ratio are very important components in microwave communication systems. [0003] The electric tuning filter adjusts the center frequency of the filter by controlling the length of the tuning rod with a stepping motor. tuning function. However, with the wear of the cavity of the filter device, the stepper motor drive, the tuning rod and other components during use and the change of...
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IPC IPC(8): H03H21/00
CPCH03H21/00
Inventor 罗亚赛段啸寒孟旭东
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP