Voltage-sensitive capacitor frequency hopping filter based on barium strontium titanate

Abstract

The invention discloses a frequency hopping filter based on a barium strontium titanate pressure-sensitive capacitor. The frequency hopping filter comprises discrete capacitors C1-C3 and C6-C8, bariumstrontium titanate pressure-sensitive capacitors C4 and C5, an inductor L1-L7 and a switching diode D1-D6. According to the frequency hopping filter based on the barium strontium titanate pressure-sensitive capacitor, two BST barium strontium titanate high-Q pressure-sensitive capacitors and six high-Q discrete capacitors are adopted, the high-Q discrete capacitors are freely combined, 225MHz-512MHz is segmented and then connected with the high-Q pressure-sensitive capacitor in parallel for use, the number of the high-Q discrete capacitors can be greatly reduced, and the hardware cost and thedebugging complexity are reduced. Due to the reduction of the number of the high-Q discrete capacitors, the drive circuit is correspondingly reduced, the volume power consumption of the frequency hopping filter is correspondingly reduced, and due to the fact that each section multiplexes the high-Q voltage-sensitive capacitors, only six high-Q discrete capacitors are needed, the cost is greatly saved.

Description

technical field [0001] The invention belongs to the frequency hopping filter in the communication field, and is suitable for an anti-jamming communication radio frequency front-end preselector, and is especially suitable for multi-mode terminals and handheld devices requiring miniaturization, low cost, and low power consumption. Background technique [0002] In order to avoid being captured and interfered by the enemy during communication, modern communication requires the use of frequency hopping communication anti-jamming method. At this time, it is required that the center frequency of the pre-selection filter of the RF front-end should continuously hop following the frequency hopping pattern of the system. [0003] With the needs of multi-mode terminals, it is required to integrate many functions of radio station, ad hoc network and satellite mobile communication on a handheld device. The performance of the RF front-end preselection filter is particularly important to t...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the anti-interference problem of the RF front-end of handheld terminal products, the present invention proposes a frequency-hopping filter based on barium strontium titanate varistor

Images