Tunable Multiband Microwave Photonic Filters
Abstract
:1. Introduction—The Challenges
2. Tunable or Reconfigurable Dual-Band Microwave Photonic Filters
2.1. Independently Tunable Dual-Passband Filter Based on Phase Modulator and an Equivalent Phase-Shifted Fiber Bragg Grating
2.2. Reconfigurable Dual-Passband Filter Based on a Modified Mach-Zehnder Interferometer
2.3. Tunable Dual-Passband Filter Based on Broadband Light Source and Optical Delay Branches
2.4. Reconfigurable Dual-Passband Filter Based on a Lyot Loop Filter
= BLe/β2LDC,
2.5. Ultrafast Passband Reconfiguration Based Nonlinear Polarization Rotation
3. Passband Reconfigurable Multiband Microwave Photonic Filters
3.1. Three-Passband Microwave Photonic Filter
3.2. High Passband Count Reconfigurable Microwave Photonic Filter
4. Passband Tunable and Reconfigurable Multiband Microwave Photonic Filters
4.1. Multiband Filter Based on Tailoring of the Brillouin Gain in Chalcogenide Chip Using Aribitary Waveform Generation
4.2. Multiband Filter Based on Cascading Tunable Mach-Zehnder Interferometers for Interleaving FIR Filter Taps Generation
5. Applications of Tunable Multiband Microwave Photonic Filters
5.1. RF Equalizer
5.2. Pulse Shaping and Spectral Shaping
6. Discussion and Conclusions
7. Patent
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Reference | Technique | Number of Passbands | Rejection Level (dB) | Tunability/Reconfigurability | Tuning Mechanism |
---|---|---|---|---|---|
[24] | LTCC | 3 | 20 | Not tunable | - |
[25] | Stepped impedance resonator | 6 | 25 | Not tunable | - |
[26] | Microstrip + trimmer capacitor | 4 | 40 | Continuously tunable/Reconfigurable | Adjustable capacitor |
[27] | Microstrip + Varactor | 2 | 35 | Continuously tunable | Adjustable varactor |
[28] | RF-MEMS | 2 | 30 | Discretely tunable | MEMS capacitor |
[29] | Microstrip + DGS | 3 | 30 | Reconfigurable | PIN diode |
[30] | (BBS) Broadband optical source | 2 | 20 | Continuously tunable | Optical delay line |
[22] | BBS + optical switches | 3 | 35 | Discretely tunable | Optical switch |
[21] | BBS + loop mirror filter | 3 | 35 | Reconfigurable | Manual polarization controller |
[23] | Phase-shifted FBG | 2 | 25 | Continuously tunable | Laser wavelength adjustment |
[31] | BBS + modified MZI | 2 | 30 | Continuously tunable | Optical delay line |
[32] | Stimulated Brillouin Scattering | 6 | 20 | Continuously tunable/Reconfigurable | Laser wavelength adjustment |
[33,34] | BBS + Lyot loop filter | 12 | 30 | Reconfigurable | Polarization controlling |
[35] | BBS + SOA incorporated Lyot loop filter | 2 | 40 | Reconfigurable | Nonlinear polarization rotation |
[36] | BBS + cascaded MZIs | 13 | 35 | Continuously tunable and Reconfigurable | Tunable optical delay and Tunable coupler |
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Fok, M.P.; Ge, J. Tunable Multiband Microwave Photonic Filters. Photonics 2017, 4, 45. https://doi.org/10.3390/photonics4040045
Fok MP, Ge J. Tunable Multiband Microwave Photonic Filters. Photonics. 2017; 4(4):45. https://doi.org/10.3390/photonics4040045
Chicago/Turabian StyleFok, Mable P., and Jia Ge. 2017. "Tunable Multiband Microwave Photonic Filters" Photonics 4, no. 4: 45. https://doi.org/10.3390/photonics4040045