Wide-tuning electrically tunable filter

Abstract

A wide tuning electrically tunable filter disclosed by the present invention comprises a filtering assembly, a processor and a driving assembly, the filtering assembly comprises a coupling inductor, amatching inductor and a tuning device, the coupling inductor comprises a plurality of straight wiring portions, and the straight wiring inductor portions located at different wiring layers are connected through a plurality of via holes. The coupling inductor is further connected with the matching inductor and the tuning device, the processor and the driving assembly are located on the surface ofthe first wiring layer, the processor is connected with the tuning device through the driving assembly, and the processor is configured to achieve hopping of communication frequency through the driving assembly and the tuning device in the radio frequency communication idle stage.

Description

technical field

[0001] Embodiments of the present invention relate to filter technology, and in particular to a wide-tuning electronically tuned filter. Background technique

[0002] The electronically tuned filter is a bandpass filter with adjustable frequency. Its function is to select useful signals from the received spectrum, filter out interference and spurious signals, and improve the signal-to-noise ratio of the receiver.

[0003] With the development of communication systems, communication spectrum resources are becoming increasingly tight, and communication interference between different communication users is more likely to occur. In the prior art, electronically tunable filters usually design circuit models based on Chebyshev theory, and realize circuit fabrication with LC technology. Traditional electronically tunable filters have problems such as large volume, wide filter bandwidth, and poor anti-interference ability. In particular, in the short-wave communicat...

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