Patent ID: 11881887
Assignee: FUJIKURA LTD.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 2:
3. A frequency converter that up-converts a transmission signal in an intermediate frequency band into a signal in a wireless frequency band as a lower side band of a local oscillation signal using the local oscillation signal, wherein
when a width of a frequency band of the transmission signal is CHwid,
a center value of the frequency band of the transmission signal is IFtx,
a center value of a passband width IFwid of the intermediate frequency band is IFcent,
a lower limit frequency of the wireless frequency band is PMlow, and
an upper limit frequency of the wireless frequency band is PMhigh,
in a case where a center value RFtx of the frequency band of the transmission signal after being up-converted satisfies PMlow+1/2×IFwid≥RFtx≥PMlow+1/2×CHwid, a frequency ωLO of the local oscillation signal satisfies ωLO=PMlow+1/2×IFwid+IFcent and IFtx=ωLO−RFtx.