High-frequency frequency hopping filter

Abstract

The invention discloses a high-frequency frequency hopping filter which comprises a resonator arranged between an input end inductor tap and an output end inductor tap. The resonator comprises three Y-shaped inductors which are connected in sequence, and an adjustable capacitor is arranged between any two Y-shaped inductors and is grounded. The adjustable capacitor comprises a capacitor array composed of a series of binary capacitors, and each capacitor is controlled by an independent switching circuit to be switched on and off. The inductance coils, the resistors and the capacitors of the Y-shaped inductors, the capacitor array and the switching circuits are welded on surface of a low-temperature co-fired ceramic substrate by adopting a surface-mount welding process. According to the frequency hopping filter, the inductors are realized by adopting a printed annular metal belt, the resistors are realized by adopting the high-resistance alloy, the inductors and the resistors are sintered in a ceramic body in the ceramic co-firing stage, and the process consistency is extremely high. Devices such as the capacitors and diodes of the frequency hopping filter are still lumped components, and the components are welded on a bonding pad on the surface of a ceramic body through a surface-mount welding process.

Description

technical field [0001] The invention relates to the field of frequency hopping filters, in particular to a VHF and UHF band frequency hopping filter based on low-temperature co-fired ceramic technology. Background technique [0002] With the rapid development of communication technology, spectrum resources are increasingly tight, and communication electronic equipment is extremely vulnerable to interference and suppression. As a frequency-selective filter component developed by the research and development, the frequency-hopping filter has great advantages in solving the problem of spectrum tension. After the Gulf War, the United States began to develop frequency hopping filters and applied them in military communications, which significantly improved the sensitivity of wireless receivers and their resistance to signal interference. Because of its excellent performance in anti-fading, anti-interception and anti-jamming, frequency hopping filters have been highly valued in i...

AI Technical Summary

Problems solved by technology

[0010] A large number of lumped components such as capacitors, inductors, and diodes are used, some of which require manual soldering, and manual debugging is also required, which bury hidden dangers for product batch consistency and product quality

[0011] The size and volume of frequency hopping filters using lumped components remain high and difficult to compress, which is not conducive to the miniaturization of radio stations

Images