Phase filter for radio frequency (RF) signals

摘要

In a Radio Frequency (RF) filter, a first conductive link has a first length corresponding to a first (N) number of wavelengths of a primary RF frequency. A second conductive link has a second length corresponding to both a second (M) number of wavelengths of the primary RF frequency and an out-out-phase (X) number of wavelengths of a secondary RF frequency. An input interface receives an input RF signal and transfers a first component of the input signal over the first link and transfers a second component of the input RF signal over the second link. An output interface combines the first component from the first link with the second component from the second link to transfer an output RF signal. The energy at the primary frequency constructively combines in-phase, but the energy at the secondary frequency destructively combines out-of-phase.

主权项

1. A Radio Frequency (RF) signal filter comprising:
a first conductive link having a first length corresponding to a first (N) number of wavelengths of a primary RF frequency; a second conductive link having a second length corresponding to both a second (M) number of wavelengths of the primary RF frequency and an out-out-phase (X) number of wavelengths of a secondary RF frequency; an input interface configured to receive an input RF signal, transfer a first RF component of the input RF signal over the first conductive link, and transfer a second RF component of the input RF signal over the second conductive link; and an output interface configured to combine the first RF component transferred over the first conductive link with the second RF component transferred over the second conductive link to form and transfer an output RF signal.