Electrically tunable filter
An electric tuning filter, electric tuning technology, applied in the direction of multi-terminal pair network, etc., can solve the problem that the electric tuning filter cannot be adjusted quickly, and achieve the effect of improving the dynamic range, improving adaptability, and increasing the FM frequency band
Pending Publication Date: 2020-12-11
武汉博畅通信设备有限责任公司
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Problems solved by technology
[0004] In view of this, the present invention proposes an electronically adjustable filter to solve the problem that the traditional electronically adjustable filter cannot be continuously and quickly adjusted in the high frequency band
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[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.
[0028] Such as figure 1 As shown, the electronically adjustable filter of this embodiment includes: a signal input circuit, a first radio frequency switch circuit, a general filter circuit, a second radio frequency switch circuit and a main control circuit; the signal input circuit is sequentially connected with the first radio frequency switch circuit, The overall filter circuit is connected to the second radio frequency switch circuit, and the ma...
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The invention provides an electrically tunable filter. The electrically tunable filter comprises a signal input circuit, a first radio frequency switch circuit, a filter main circuit, a second radio frequency switch circuit and a main control circuit; and the signal input circuit is sequentially connected with the first radio frequency switch circuit, the filter main circuit and the second radio frequency switch circuit, and the main control circuit is respectively connected with the first radio frequency switch circuit, the filter main circuit and the second radio frequency switch circuit. Through the one-to-seven radio frequency switch circuit and the filter circuit, the adjustment performance of the electrically tunable filter on a high frequency band is improved, the in-band fluctuation is reduced, the overall performance of the electrically tunable filter is improved, and the electrically tunable filter can be continuously and quickly adjusted on the high frequency band.
Description
technical field [0001] The invention relates to the technical field of radio frequency band-pass filtering, in particular to an electronically adjustable filter. Background technique [0002] ESC filter is a new type of radio frequency bandpass filter, which is an indispensable key device in modern digital communication and frequency hopping technology, especially the preferred device for military software radio communication system to improve anti-interference ability. The whole machine uses electric Adjusting the filter can greatly improve the dynamic range, operating distance and anti-interference ability of the whole machine. [0003] However, the existing ESC filters can adapt to relatively low frequency bands, and cannot adapt to high frequency bands. There are still deficiencies such as poor passband square coefficient, large fluctuations in the band, limited adjustment speed, and discontinuous ESC. Therefore, there is an urgent need for an electronically adjustable ...
Claims
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IPC IPC(8): H03H11/02
CPCH03H11/02
Inventor 马忠瑞蔡楚才
Owner 武汉博畅通信设备有限责任公司