RF CIRCUIT

摘要

An RF circuit for providing phase coherent signals, an RF heating apparatus comprising the RF circuit and a method for providing phase coherent signals in an RF circuit. The RF circuit has a first frequency synthesiser including a fractional-N phase locked loop and a second frequency synthesiser including an integer-N phase locked loop. An output of the first frequency synthesiser is connected to a phase frequency detector of the integer-N phase locked loop of the second frequency synthesiser via a synchronisation signal divider for distributing a synchronisation signal from the first frequency synthesiser to the second frequency synthesiser. The integer-N phase locked loop of the second frequency synthesiser comprises a frequency divider of the same modulus as the synchronisation signal divider.

主权项

1. An RF circuit for providing phase coherent signals, the circuit comprising:
a first frequency synthesiser comprising a fractional-N phase locked loop; and a second frequency synthesiser comprising an integer-N phase locked loop; wherein an output of the first frequency synthesiser is connected to a phase frequency detector of the integer-N phase locked loop of the second frequency synthesiser via a synchronisation signal divider for distributing a synchronisation signal from the first frequency synthesiser to the second frequency synthesiser, and wherein the integer-N phase locked loop of the second frequency synthesiser comprises a frequency divider of the same modulus as the synchronisation signal divider.