US 11,942,995 B2
Up/down photonic frequency converter for incoming radio frequency (RF) signals built into the optoelectronic oscillator (OEO)
Larissa Aguiar Dantas de Britto, São José dos Campos (BR); Jognes Panasiewicz Junior, São José dos Campos (BR); and Gefeson Mendes Pacheco, São José dos Campos (BR)
Assigned to Instituto Tecnológico de Aeronáutica—ITA, São dos Campos (BR)
Appl. No. 17/603,728
Filed by INSTITUTO TECNOLÓGICO DE AERONÁUTICA—ITA, São José dos Campos (BR)
PCT Filed Apr. 24, 2019, PCT No. PCT/BR2019/050147
§ 371(c)(1), (2) Date Oct. 14, 2021,
PCT Pub. No. WO2020/215132, PCT Pub. Date Oct. 29, 2020.
Prior Publication US 2022/0247491 A1, Aug. 4, 2022
Int. Cl. H04B 10/2575 (2013.01)
CPC H04B 10/2575 (2013.01) [H04B 10/25759 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A photonic frequency converter for converting values above and below an input radio frequency (RF) signal, comprising:
an integrated optoelectronic oscillator (OEO) comprising an optical link and a feedback loop in radio frequency (RF) domain;
an injection circuit (IC) for injecting the input radio frequency (RF) signal, wherein the optoelectronic oscillator (OEO) being a local oscillator (LO) of frequency conversion operation using only a single Mach-Zehnder (MZ) electro-optical modulator and a single photodetector, which allows to perform simultaneously the frequency conversion into the values above and below (down/up converter) the input radio frequency (RF) signal;
a radio frequency (RF) band pass filter; and
a power splitter connected between the single photodetector and the radio frequency (RF) band pass filter;
wherein more than one signal is simultaneously applied for frequency conversion;
wherein a first radio frequency (RF) signal source injects a signal with a frequency f1 and a second radio frequency (RF) signal source injects a signal with a frequency f2;
wherein the signal with the frequency f1 and the signal with the frequency f2 are combined in a first power combiner to then be injected into the optoelectronic oscillator (OEO) through a second power combiner; and
wherein the optoelectronic oscillator (OEO) generates a frequency signal f0, defined by a frequency response band of the radio frequency (RF) band pass filter.