A Broadband Frequency Hopping Filter

Abstract

The invention discloses a broadband frequency hopping filter, comprising: a low frequency frequency hopping filter bank, a high frequency frequency hopping filter bank, a drive control unit and a storage control unit; the low frequency frequency hopping filter bank includes a first An input radio frequency switch, the first output radio frequency switch, the first frequency hopping filter, the second frequency hopping filter and the third frequency hopping filter arranged in parallel; the high frequency band frequency hopping filter bank includes the second input radio frequency switch , the second output radio frequency switch, the fourth frequency-hopping filter, the fifth frequency-hopping filter, the first low-pass filter, the second low-pass filter and the third low-pass filter arranged in parallel; the storage control unit It is electrically connected with the driving control unit, and the output terminals of the driving control unit are respectively connected with the capacitive loading control input terminals of the first, second, third, fourth and fifth frequency hopping filters. The invention provides a broadband frequency hopping filter with small insertion loss, high Q value, high power, wide frequency band and fast switching speed.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a broadband frequency hopping filter. Background technique [0002] Frequency hopping technology is a spread spectrum technology that uses carrier hopping to achieve spectrum broadening. The carrier frequency of the signal sent by a specific dwell time has been widely used in anti-interference communication systems in recent years due to the advantages of frequency hopping technology, which has strong anti-interference, communication security is not easy to be intercepted, and high spectrum utilization. [0003] In the frequency hopping communication equipment, the frequency hopping filter is an important device, and the high-power frequency hopping filter is generally placed at the transmitting end of the communication machine to suppress the harmonics and near-end spurs accompanying the high-power amplifier of the transmitter. interference to reduce interf...

AI Technical Summary

Problems solved by technology

At present, the frequency hopping communication channels are mainly concentrated in 30MHz~512MHz. The traditional LC centralized tuning method is adopted. The Q value is low, the out-of-band attenuation is small, and the anti-interference ability is poor. The filter drive control circuit uses transistor (NPN) switching, and the switching speed Slow, easily disturbed by recognition

Therefore, there is a need to extend the frequency band to 2.5GHz, but when the frequency band is extended to 2.5GHz, there are problems such as small power capacity of the frequency hopping filter, large insertion loss, small out-of-band attenuation, and the difficulty of extending the frequency band to 2.5GHz.

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