Switchable dual-core injection locking frequency divider with wide locking range

Abstract

The invention discloses a switchable dual-core injection locking frequency divider with a wide locking range, and the frequency divider enables two self-resonant frequencies to be distributed at different frequencies through employing different parasitic capacitances of a cross coupling tube when two cores are connected and disconnected. The locking ranges in the two modes are added, so the overall locking range is greatly expanded; the resonant cavity oscillates at a lower resonance point of the transformer in two modes, the quality factor of the resonant cavity is optimized to improve the phase noise of the frequency divider, and the better overall performance can be achieved in the aspects of power consumption, output power and the like by optimizing the parameters of the transformer, the injection pipe, the cross coupling pipe and other elements. The structure is simple, and integration is facilitated.

Description

technical field [0001] The invention belongs to the field of microwave engineering, and in particular relates to a switchable dual-core injection-locked frequency divider with a wide locking range. Background technique [0002] As one of the key modules in the PLL system, the frequency divider's performance will directly affect the quality of the signal source and the overall performance of the transceiver system. While implementing the frequency division function, we must comprehensively consider performance indicators such as the locking range of the frequency divider, power consumption, phase noise, output power, and chip area. Dividers can be classified into static dividers, regenerative dividers, and injection-locked dividers. Among them, the injection-locked frequency divider has received continuous attention because of its high operating frequency and low power consumption. In a phase-locked loop system, the locking range of the injection-locked frequency divider ne...

AI Technical Summary

Problems solved by technology

However, the above existing methods have limited effect on improving the locking range, and fail to achieve an optimal compromise among various indicators, and cannot meet the strict requirements of the system for the injection locking frequency divider.

Images