Microwave photonic multiband filter with independently tunable passband spectral properties

Liu, Qidi; Ge, Jia; Fok, Mable P.

doi:10.1364/ol.43.005685

Cited by 22 publications

(3 citation statements)

References 32 publications

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“…The use of tunable microwave photonic filter with tens of gigahertz frequency tuning speed is an effective way to use microwave photonic technology for performing RF switching. MWP filters with single and multiple passbands have been intensively demonstrated using various techniques including the use of optical comb filter [25,43,44], stimulated Brillouin scattering (SBS) [24,45], and liquid crystal on silicon (LCoS) [46,47]. Various MWP filters could have slightly different pros and cons; for example, the use of SBS filter [24] could give a sharper MWP filter profile and results in a finer frequency resolution in the frequency-hopping scheme.…”

Section: Mwp Rf Switch For Frequency-hopping Signal Generationmentioning

confidence: 99%

Ultrafast and Wideband Microwave Photonic Frequency-Hopping Systems: A Review

Liu

Fok

2020

Applied Sciences

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The increasing demands to enhance information security in data transmission, providing countermeasures against jamming in military applications, as well as boosting data capacity in mobile and satellite communication, have led to a critical need for high-speed frequency-hopping systems. Conventional electronics-based frequency-hopping systems suffer from low data rate, low hopping speed, and narrow hopping-frequency bandwidth. Unfortunately, those are important aspects to facilitate frequency-hopping in emerging microwave systems. The recent advancement of microwave photonics—the use of light to process microwave signals—provides promising solutions to tackle the challenges faced by electronic frequency-hopping systems. In this paper, the challenges of achieving real-time frequency-hopping systems are examined. The operation principles and results of various microwave photonics-enabled frequency-hopping systems are comprehensively discussed, which have wide hopping-frequency bandwidth and frequency-hopping speed from nanoseconds to tens of picoseconds. Lastly, a bio-inspired jamming-avoidance system that could potentially be used for adaptive frequency-hopping is also introduced.

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Section: Mwp Rf Switch For Frequency-hopping Signal Generationmentioning

confidence: 99%

Ultrafast and Wideband Microwave Photonic Frequency-Hopping Systems: A Review

Liu

Fok

2020

Applied Sciences

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“…The literature is large in kinds of configurations. Therefore, there are structures such as microwave photonic filters [17][18][19], filters with lumped elements [20,21], mixed lumped components [22], transfer-function (TF) [23,24], filters with defected ground structure (DGS) [2,25], multiple mode resonators (MMR) [26][27][28], spoof surface plasmon polaritons (SSPP) [29], stub loaded resonators (SLR) [30][31][32][33], stepped impedance resonators (SIR) [32][33][34] which can use transmission zeros (TZs) [31] with symmetric [32,33] or asymmetric structure's geometry [35]. Designers' innovative ideas allowed several filters' shapes such as square [36,37], T-shapes, L-shapes, and U-shapes [6,37].…”

Section: Introductionmentioning

confidence: 99%

Tri-Band Bandpass Filter Using Mixed Short/Open Circuited Stubs and Q-Factor With Controllable Bandwidth for Was, Ism, and 5g Applications

Massamba¹,

Mpele²,

Mbango³

2022

PIER C

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Designing a multi-band bandpass filter (BPF) with controllable bandwidths is an alternative process to several technologies suggested by researchers. Hence, this paper presents a tri-band BPF in microstrip technology where T-shaped short-and-open stubs have alternating positions to use the maximally flat theory, based on the overall ABCD parameters of the circuit. The combination of the design Q-factor and operating frequency to mismatch the design is the technique basis. The proposed structure comprises quarter wavelength (λ/4) line section to develop a tri-band BPF frequency. All stubs are symmetrical relative to the center axis, while the prototype has been fabricated on a wafer of 22.42 × 7.62 mm 2 . Using an FR4 HTG-175 with a thickness 1-mm, dielectric constant ε r = 4.4, and loss tangent tan δ = 0.02, the (4.06-4.283) GHz, (5.877-6.408) GHz,) GHz are obtained referring to a 10-dB of the return loss. In contrast, the insertion losses at the center frequencies are 2.107/1.354/4.08 dB and the fractional bandwidths of 2.134%, 5.346%, and 8.645%, respectively. This covers WAS (including RLAN), ISM, and 5G applications. However, the attenuation coefficient is between 1.326 dB and 4.368 dB. The tri-band BPF prototype was validated using the Anritsu MS4642B 20 GHz Vector Network Analyzer. The measured and E-simulated results have been compared with good agreement.

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“…Hopping speed of 10 ns can be achieved through the control of an optically injected semiconductor laser [11], while the control of bias voltage of a dual drive Mach-Zehnder modulator (DDMZM) enables 1 ns switching speed [12]. The use of microwave photonic filters [13]- [18], including stimulated Brillouin scattering based [13] and comb filter based [14] techniques for generating fast-switching frequency hopping signal can achieve hopping speed of hundreds of picoseconds. On the other hand, photonic-assisted microwave signal mixing for amplitude and phase-switching signal generation can be implemented via stimulated Brillouin scattering (SBS)based carrier suppression [19], the use of phase coherent orthogonal carrier [20], polarization rotation in semiconductor optical amplifier [21], and the use of Sagnac loop based modulator [22].…”

Section: Introductionmentioning

confidence: 99%

Real-Time RF Multi-Dimensional Signal Switching Using Polarization-Dependent Optical Mixing

Liu

Fok

2020

IEEE Photonics J.

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Real-time switching of RF signal properties, including phase, frequency, and amplitude, is essential for emerging high-speed RF systems to improve security, signal fidelity, and enhance data capacity. While it is easy to switch the amplitude of an RF signal at GHz speed, unfortunately, it is extremely challenging to perform phase or frequency switching of an RF signal with a fast switching time in the picosecond range. In this paper, a real-time RF signal switching technique is proposed and demonstrated based on polarization dependent four-wave mixing in a highly-nonlinear optical fiber. Due to the amplitude, phase, and frequency transparent property of four-wave mixing, the proposed scheme is capable of manipulating multidimensional RF signal of over tens of GHz frequency, and achieve frequency hopping and phase switching of a GHz RF signal. The switching time is not limited by the proposed temporal switching technique; instead, it is solely depending on the rise/fall time of the control signal itself. Furthermore, the generation of frequency hopping signal with a switching time of 50 ps, as well as simultaneously frequency and phase switching of a GHz RF signal have been experimentally demonstrated based on the proposed RF signal switching scheme.

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Microwave photonic multiband filter with independently tunable passband spectral properties

Cited by 22 publications

References 32 publications

Ultrafast and Wideband Microwave Photonic Frequency-Hopping Systems: A Review

Ultrafast and Wideband Microwave Photonic Frequency-Hopping Systems: A Review

Tri-Band Bandpass Filter Using Mixed Short/Open Circuited Stubs and Q-Factor With Controllable Bandwidth for Was, Ism, and 5g Applications

Real-Time RF Multi-Dimensional Signal Switching Using Polarization-Dependent Optical Mixing

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