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Articoli di riviste sul tema "LOW BAND LOSS"

Autore: Grafiati

Pubblicato: 11 settembre 2023

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1

F. Esmail, B. A., H. A. Majid, M. F. Ismail, S. H. Dahlan, Z. Z. Abidin e M. K. A. Rahim. "Dual band low loss metamaterial structure at millimetre wave band". Indonesian Journal of Electrical Engineering and Computer Science 15, n. 2 (1 agosto 2019): 823. http://dx.doi.org/10.11591/ijeecs.v15.i2.pp823-830.

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In this paper, the Dual band modified split square resonator (MSSR) metamaterial (MM) structure was designed and numerically investigated at millimetre wave (mm-Wave) frequency range. The proposed structure operated at two resonance frequencies 28 GHz and 32.54 GHz. The dual-band behaviour of the proposed structure because of the self and mutual coupling between two metallic squares of the structure. Furthermore, The MSRR structure performed very well at both resonance frequencies by providing high transmission coefficient, S21, with a loss of -0.3 dB (0.97 linear scale) at lower resonance frequency 28 GHz and -0.18 dB (0.98 linear scale) at upper resonance frequency 32.54 GHz. In this regard, the numerical simulation was conducted to optimize the MSSR structure in such a way that the ratio of effective inductance-to-capacitance (L/C) was raised. As a result, the inherent MM losses were reduced. The robust retrieval algorithm was utilized to reconstruct the refractive index, effective permittivity, and effective permeability and to verify the left-hand property of the proposed structure. The simulation results showed that the MSSR unit cell introduces two regions of the negative refractive index below the lower resonance frequency, 28 GHz and above the upper resonance frequency, 32.54 GHz.

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Gomez-Mendez, Javier, Jose Ismael Martinez-Lopez, Jorge Rodriguez-Cuevas, Andrea G. Martinez-Lopez e Alexander E. Martynyuk. "Low-Loss Polarization-Agile U-Band Switch". IEEE Latin America Transactions 18, n. 09 (settembre 2020): 1656–63. http://dx.doi.org/10.1109/tla.2020.9381809.

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3

Ueno, K., H. Kumazawa e I. Ohtomo. "Low-loss Ka-band frequency selective subreflector". Electronics Letters 27, n. 13 (1991): 1155. http://dx.doi.org/10.1049/el:19910720.

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4

Dong, Yake, Hong Yao, Jun Du, Jingbo Zhao, Ding Chao e Benchi Wang. "Research on low-frequency band gap property of a hybrid phononic crystal". Modern Physics Letters B 32, n. 15 (24 maggio 2018): 1850165. http://dx.doi.org/10.1142/s0217984918501658.

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A hybrid phononic crystal has been investigated. The characteristic frequency of XY mode, transmission loss and displacement vector have been calculated by the finite element method. There are Bragg scattering band gap and local resonance band gap in the band structures. We studied the influence factors of band gap. There are many flat bands in the eigenfrequencies curve. There are many flat bands in the curve. The band gap covers a large range in low frequency. The band gaps cover more than 95% below 3000 Hz.

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5

Sun Hao, 孙昊, 李浩 Li Hao, 王峨锋 Wang Efeng, 曾旭 Zeng Xu, 李安 Li An, 冯进军 Feng Jinjun e 闫铁昌 Yan Tiechang. "Broad band low loss input coupling system in W-band gyrotron". High Power Laser and Particle Beams 27, n. 5 (2015): 53004. http://dx.doi.org/10.3788/hplpb20152705.53004.

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6

Ryu, Jewan, e Heekyung Park. "Band-Sensitive Calibration of Low-Cost PM2.5 Sensors by LSTM Model with Dynamically Weighted Loss Function". Sustainability 14, n. 10 (18 maggio 2022): 6120. http://dx.doi.org/10.3390/su14106120.

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Particulate matter has become one of the major issues in environmental sustainability, and its accurate measurement has grown in importance recently. Low-cost sensors (LCS) have been widely used to measure particulate concentration, but concerns about their accuracy remain. Previous research has shown that LCS data can be successfully calibrated using various machine learning algorithms. In this study, for better calibration, dynamic weight was introduced to the loss function of the LSTM model to amplify the loss, especially in a specific band. Our results showed that the dynamically weighted loss function resulted in better calibration in the specific band, where the model accepts the loss more sensitively than outside of the band. It was also confirmed that the dynamically weighted loss function can improve the calibration of the LSTM model in terms of both overall performance and local performance in bands. In a test case, the overall calibration performance was improved by about 12.57%, from 3.50 to 3.06, in terms of RMSE. The local calibration performance in the band improved from 4.25 to 3.77. Such improvements were achieved by varying coefficients of the dynamic weight. The results from different bands also indicated that having more data in a band will guarantee better improvement.

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7

Yamada, Jum, Yuuji Fujita e Akitsuna Yuhara. "Wide-Band and Low-Loss Unidirectional SAW Filter". Japanese Journal of Applied Physics 25, S1 (1 gennaio 1986): 151. http://dx.doi.org/10.7567/jjaps.25s1.151.

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8

You-Fu, Geng, Tan Xiao-Ling, Zhong Kai, Wang Peng e Yao Jian-Quan. "Low Loss Plastic Terahertz Photonic Band-Gap Fibres". Chinese Physics Letters 25, n. 11 (30 ottobre 2008): 3961–63. http://dx.doi.org/10.1088/0256-307x/25/11/034.

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9

Cao, Tun, Chenwei Wei e Martin J. Cryan. "Low-loss dual-band double-negative chirped metamaterial". Journal of the Optical Society of America B 32, n. 1 (18 dicembre 2014): 108. http://dx.doi.org/10.1364/josab.32.000108.

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10

FUKUDA, Atsushi, Takayuki FURUTA, Hiroshi OKAZAKI, Shoichi NARAHASHI e Toshio NOJIMA. "Low-Loss Matching Network Design for Band-Switchable Multi-Band Power Amplifier". IEICE Transactions on Electronics E95.C, n. 7 (2012): 1172–81. http://dx.doi.org/10.1587/transele.e95.c.1172.

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11

Park, Ju Seong, Seung Hyun Min, Tae Gyu Kim, Hyun Chul Choi e Kang Wook Kim. "Compact low-loss narrow-band duplexer using low-impedance open-loop resonators for K-band radiometers". Review of Scientific Instruments 90, n. 5 (maggio 2019): 054705. http://dx.doi.org/10.1063/1.5086380.

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12

Mohassieb, S. A., E. G. Ouf, K. F. A. Hussein, M. A. El-Hassan e A. Farahat. "Low-Loss Super-Wide Band Antenna over Customized Substrate". Advanced Electromagnetics 12, n. 3 (30 luglio 2023): 33–42. http://dx.doi.org/10.7716/aem.v12i3.2067.

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In this work, a super wide band antenna is proposed to operate in the frequency band 2.3-23 GHz. The antenna has two planar arms with a modified diamond shape printed on the opposite faces of three-layer dielectric substrate. Each arm of the antenna is capacitively coupled to circular sector near its end to increase the impedance matching bandwidth. The dielectric substrate is customized to fit the shape of the antenna arms and the parasitic elements to reduce the dielectric loss. The substrate material is composed of three layers. The upper and lower layers are Rogers RO3003TM of 0.13 mm thickness and the middle layer is made of paper of 2.3 dielectric constant and 2.7 mm thickness. The antenna is fed through a wide band impedance matching balun. The antenna design stages are performed through electromagnetic simulations concerned with the parametric study to get the optimum antenna dimensions to numerically investigate the role of the parasitic element to enhance the antenna performance. A prototype of the proposed antenna is fabricated to validate the simulation results. The experimental measurements come in good agreement with the simulation results and both of them show that the antenna operates efficiently over the frequency band 2.3-23 GHz with minimum radiation efficiency of 97% and maximum gain of 5.2 dBi. The antenna has bandwidth to dimension ratio (BDR) of 1360.

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13

An, Dan, e Jin-Koo Rhee. "Low Conversion Loss and High Isolation W-band MMIC Mixer Module". Journal of the Institute of Electronics and Information Engineers 52, n. 2 (25 febbraio 2015): 50–54. http://dx.doi.org/10.5573/ieie.2015.52.2.050.

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14

Xiang, Tianyu, Tao Lei, Ting Chen, Zhaoyang Shen e Jing Zhang. "Low-Loss Dual-Band Transparency Metamaterial with Toroidal Dipole". Materials 15, n. 14 (19 luglio 2022): 5013. http://dx.doi.org/10.3390/ma15145013.

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In this paper, a low-loss toroidal dipole metamaterial composed of four metal split ring resonators is proposed and verified at microwave range. Dual-band Fano resonances could be excited by normal incident electromagnetic waves at 6 GHz and 7.23 GHz. Analysis of the current distribution at the resonance frequency and the scattered power of multipoles shows that both Fano resonances derive from the predominant novel toroidal dipole. The simulation results exhibit that the sensitivity to refractive index of the analyte is 1.56 GHz/RIU and 1.8 GHz/RIU. Meanwhile, the group delay at two Fano peaks can reach to 11.38 ns and 12.85 ns, which means the presented toroidal metamaterial has significant slow light effects. The proposed dual-band toroidal dipole metamaterial may offer a new path for designing ultra-sensitive sensors, filters, modulators, slow light devices, and so on.

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15

Mangi, Farman Ali. "Low Loss Transmission Circular Polarizer for KU Band Application". Sukkur IBA Journal of Emerging Technologies 1, n. 1 (27 giugno 2018): 28–33. http://dx.doi.org/10.30537/sjet.v1i1.164.

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Low loss transmission circular polarizer is proposed for Ku band applications. The designed structure consists of two closely cross metallic strips which are based on FSS for 15.25 GHz and 15.28 GHz applications. The right hand circular polarization (RHCP) and left handed circular polarization (LHCP) are obtained at 15.25 GHz and at 15.28 GHz. The transmission loss through polarizer is important issue for high frequency applications. Due to transmission loss, new techniques are required to reduce the transmission loss of transmitted wave and achieve perfect circular polarization. Meanwhile, low loss transmission has been achieved by using dual layer of strips to obtain perfect circular polarization at certain mentioned resonant frequencies. Theoretically, it is found that the outgoing waves through polarizer are perfect circular polarization at the distinct frequency ranges.

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16

Maninder, K., A. Sharma, Dinesh Kumar, Surinder Singh e K. Rangra. "Low loss STS based SPDT for X — Band applications". Procedia Engineering 5 (2010): 738–41. http://dx.doi.org/10.1016/j.proeng.2010.09.214.

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17

Padilla, P., A. Muñoz-Acevedo e M. Sierra-Castañer. "Low loss 360° Ku band electronically reconfigurable phase shifter". AEU - International Journal of Electronics and Communications 64, n. 11 (novembre 2010): 1100–1104. http://dx.doi.org/10.1016/j.aeue.2009.11.007.

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18

Chang-Lee Chen, W. E. Courtney, L. J. Mahoney, M. J. Manfra, A. Chu e H. A. Atwater. "A Low-Loss Ku-Band Monolithic Analog Phase Shifter". IEEE Transactions on Microwave Theory and Techniques 35, n. 3 (marzo 1987): 315–20. http://dx.doi.org/10.1109/tmtt.1987.1133644.

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19

Hayden, J. S., e G. M. Rebeiz. "Low-loss cascadable MEMS distributed X-band phase shifters". IEEE Microwave and Guided Wave Letters 10, n. 4 (aprile 2000): 142–44. http://dx.doi.org/10.1109/75.846926.

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20

Lambard, T., O. Lafond, M. Himdi, H. Jeuland e S. Bolioli. "Low loss reflection-type phase shifter in Ku band". Microwave and Optical Technology Letters 52, n. 2 (8 dicembre 2009): 283–85. http://dx.doi.org/10.1002/mop.24944.

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21

Neogi, A., e J. R. Panda. "Dual Pass Band Filter using Quad Stub Loaded Uniform Impedance Resonator". Advanced Electromagnetics 11, n. 2 (30 giugno 2022): 64–69. http://dx.doi.org/10.7716/aem.v11i2.1852.

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A low loss, highly selective and miniaturized dual pass band filter for the wireless (WiMAX, WLAN) application is proposed in this paper. The filter is designed with Multimode resonators, constructed with Uniform Impedance Resonator (UIR) and multiple open stubs. Two different coupling schemes (electronic and magnetic) are observed for the said dual pass bands. A detail analysis about the dimension of the resonators, resonating conditions and frequency calculations are presented in this paper. The dual pass bands are achieved at 3.45 GHz and 5.4 GHz with minimum pass band insertion loss (|IL|) 0.1 and 0.18 dB and the pass band Fractional Band widths (FBW) 4% and 8% respectively. With proper optimizations, Transmission Zeros (TZ) are achieved on both sides of the dual pass bands and the spurious pass band are kept around -20dB level and hence good selectivity is achieved. The overall size of the filter is optimized for the best possible results in terms of Insertion Loss, Return Loss and selectivity, is found to be (24.2 x 21)mm = (0.28 x 0.24)λg = 0.06 λg2.

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22

Eljarrat, Alberto, Xavier Sastre, Francesca Peiró e Sónia Estradé. "Density Functional Theory Modeling of Low-Loss Electron Energy-Loss Spectroscopy in Wurtzite III-Nitride Ternary Alloys". Microscopy and Microanalysis 22, n. 3 (12 febbraio 2016): 706–16. http://dx.doi.org/10.1017/s1431927616000106.

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AbstractIn the present work, the dielectric response of III-nitride semiconductors is studied using density functional theory (DFT) band structure calculations. The aim of this study is to improve our understanding of the features in the low-loss electron energy-loss spectra of ternary alloys, but the results are also relevant to optical and UV spectroscopy results. In addition, the dependence of the most remarkable features with composition is tested, i.e. applying Vegard’s law to band gap and plasmon energy. For this purpose, three wurtzite ternary alloys, from the combination of binaries AlN, GaN, and InN, were simulated through a wide compositional range (i.e., AlxGa1−xN, InxAl1−xN, and InxGa1−xN, with x=[0,1]). For this DFT calculations, the standard tools found in Wien2k software were used. In order to improve the band structure description of these semiconductor compounds, the modified Becke–Johnson exchange–correlation potential was also used. Results from these calculations are presented, including band structure, density of states, and complex dielectric function for the whole compositional range. Larger, closer to experimental values, band gap energies are predicted using the novel potential, when compared with standard generalized gradient approximation. Moreover, a detailed analysis of the collective excitation features in the dielectric response reveals their compositional dependence, which sometimes departs from a linear behavior (bowing). Finally, an advantageous method for measuring the plasmon energy dependence from these calculations is explained.

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23

Li, Luping, Lijuan Dong, Peng Chen e Kai Yang. "A low insertion loss low-pass filter based on single comb-shaped spoof surface plasmon polaritons". International Journal of Microwave and Wireless Technologies 11, n. 08 (28 maggio 2019): 792–96. http://dx.doi.org/10.1017/s1759078719000564.

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AbstractThis paper presents a low insertion loss low-pass filter based on the spoof surface plasmon polariton (SSPP) with single comb-shape. Compared with traditional ones, the proposed filter provides lower insertion loss and return loss by optimizing the structural parameters of the mode conversion and SSPP parts. According to the measurement results, the average insertion loss of the fabricated filter is 0.41 dB and the return loss of which at the near-zero-hertz band is <−25.9 dB. The S parameter comparison result between the unoptimized and optimized filters demonstrates that the optimized filter provides lower insertion loss and return loss, smaller size, and better out-of-band rejection. The dispersion comparison result reveals the reasons behind the improved performances. The better performances of the optimized filter proves that breaking the regularity of traditional SSPP filters is beneficial to the filter's performances.

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24

Li, Haodong, Guisheng Liao, Jingwei Xu, Cao Zeng, Xiongpeng He e Pengfei Gao. "Multi-Resolution STAP for Enhanced Ultra-Low-Altitude Target Detection". Remote Sensing 13, n. 21 (20 ottobre 2021): 4212. http://dx.doi.org/10.3390/rs13214212.

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In this paper, an ultra-low-altitude target (ULAT) detection approach, referred to as the multi-resolution space-time adaptive processing (STAP), is proposed to enhance the target detection performance in a missile-borne radar system. In this respect, the whole base band is divided into a series of equal-width and center-frequency-diverse sub-bands with the frequency diversity technique, which enhances the multipath-target coupled (MTC) effect with the decreased range resolution. Hence, it is feasible to exploit the multipath signal power to improve the output signal-to-clutter-plus-noise ratio (SCNR) performance of sub-band STAP. In this regard, the mechanism of the MTC effect is analyzed numerically for the efficient sub-band STAP. However, such SCNR improvement is achieved at the cost of target tracking performance loss. Hence, the full-band STAP is further applied for multipath-target separation based on the target range-Doppler locations detected by the joint multiple sub-bands ΣΔ-STAP, which also alleviates the dynamic target attenuation and the corresponding target Doppler history corruption within the long coherent processing interval (CPI). On this basis, the SCNR performance is further improved by applying coherent accumulation among sub-CPIs, in which the clutter suppression performance degradation and coherent accumulation loss of STAP are alleviated within the sub-CPIs. Numerical and measured results corroborate the effectiveness of ULAT detection with the considered multi-resolution STAP.

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25

Zhang, Yong, Jinyu Zhang, Ruifeng Yue e Yan Wang. "Loss Analysis of Thin Film Microstrip Line With Low Loss at D Band". Journal of Lightwave Technology 39, n. 8 (15 aprile 2021): 2421–30. http://dx.doi.org/10.1109/jlt.2021.3052560.

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26

Mair, I. W. S., e E. Laukli. "Low-Frequency Hearing Loss: Auditory Brainstem Response-Derived Band Analysis". International Journal of Audiology 25, n. 3 (1986): 184–90. http://dx.doi.org/10.3109/00206098609078385.

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27

Omelianenko, M., e O. Turieieva. "24-Channel Ku-Band Low-Loss Slotted Waveguide Power Divider". Radioelectronics and Communications Systems 61, n. 6 (giugno 2018): 242–45. http://dx.doi.org/10.3103/s073527271806002x.

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28

Xin, Hao, Te-Chuan Chen e Hooman Kazemi. "A W-Band Low-Loss Dual-Polarization Quasi-TEM Waveguide". IEEE Transactions on Antennas and Propagation 56, n. 6 (giugno 2008): 1661–68. http://dx.doi.org/10.1109/tap.2008.923356.

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Turki, H., Laure Huitema, Thierry Monediere, Bertrand Lenoir e C. Breuil. "New Concept Validation of Low-Loss Dual-Band Stripline Circulator". IEEE Transactions on Microwave Theory and Techniques 67, n. 3 (marzo 2019): 845–50. http://dx.doi.org/10.1109/tmtt.2018.2890632.

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30

Ackerman, E., D. Kasemset, S. Wanuga, R. Boudreau, J. Schlafer e R. Lauer. "A low-loss Ku-band directly modulated fibre-optic link". IEEE Photonics Technology Letters 3, n. 2 (febbraio 1991): 185–87. http://dx.doi.org/10.1109/68.76884.

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Liao, Xiaoyi, Lei Wan, Yong Yin e Yichi Zhang. "W ‐band low‐loss bandpass filter using rectangular resonant cavities". IET Microwaves, Antennas & Propagation 8, n. 15 (dicembre 2014): 1440–44. http://dx.doi.org/10.1049/iet-map.2014.0252.

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Croitoru, N., A. Inberg, M. Ben-David e I. Gannot. "Broad band and low loss mid-IR flexible hollow waveguides". Optics Express 12, n. 7 (2004): 1341. http://dx.doi.org/10.1364/opex.12.001341.

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Courreges, S., Yuan Li, Zhiyong Zhao, Kwang Choi, A. Hunt e J. Papapolymerou. "A Low Loss X-Band Quasi-Elliptic Ferroelectric Tunable Filter". IEEE Microwave and Wireless Components Letters 19, n. 4 (aprile 2009): 203–5. http://dx.doi.org/10.1109/lmwc.2009.2015494.

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34

Rais-Zadeh, M., A. Kapoor, H. M. Lavasani e F. Ayazi. "Fully integrated low-loss band-pass filters for wireless applications". Journal of Micromechanics and Microengineering 19, n. 8 (13 luglio 2009): 085009. http://dx.doi.org/10.1088/0960-1317/19/8/085009.

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35

Yu Liu, A. Borgioli, A. S. Nagra e R. A. York. "K-band 3-bit low-loss distributed MEMS phase shifter". IEEE Microwave and Guided Wave Letters 10, n. 10 (2000): 415–17. http://dx.doi.org/10.1109/75.877230.

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36

El ahmar, Latifa, Ahmed Errkik, Ilham Bouzida, Anass El Mamouni e Ridouane Er-Rebyiy. "A New Compact and Low loss UHF RFID TAG". ITM Web of Conferences 48 (2022): 01008. http://dx.doi.org/10.1051/itmconf/20224801008.

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This paper aims to present a new compact and low loss UHF RFID TAG using meander technique to obtain a miniaturized Design validated to operate in Moroccan UHF band. The proposed RFID TAG is designed on PI substrate with a relative dielectric constant of 3.5, tangent loss of 0.0027 and height0.0508mm. Using an EM solver, the proposed design is matched to ALIEN H3 microchip with ZMicrochip=30.39-i*211 Ohm, it’s simulated and confirmed in Moroccan UHF band with a return loss around -20.49dB at 868MHz with a bandwidth of 16.8MHz, a simulated gain 1.82dBi and a good theoretical read range about 2.6m. The global dimension of the structure is 25×70 mm2 which is λ/14×λ/5 mm2, it’s very suitable for RFID applications that required a compact and integrated RFID TAG with a middle-read range.

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Eldesouki, Eman, Khalid Ibrahim e Ahmed Attiya. "Analysis and Design of a Diplexer for Satellite Communication System". Applied Computational Electromagnetics Society 35, n. 10 (8 dicembre 2020): 1236–41. http://dx.doi.org/10.47037/2020.aces.j.351018.

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This paper presents the design and analysis of a diplexer for satellite communication system based on hybrid spoof surface plasmon polariton (SSPP) and substrate integrated waveguide (SIW) transmission lines. The proposed diplexer consists of a SSPP printed line composed of H-shaped periodical grooved strips to operate as a low pass filter and a SIW to operate as a high pass filter. The operating frequency bands of the proposed diplexer are from 11.7 to 12.75 GHz for the downlink (DL) band, and from 17.3 to 18.35 GHz for the uplink (UL) band. These frequency bands correspond to the operating frequencies in Nile Sat 201 system. The frequencies of the DL and UL bands are adjusted independently by tuning the structure parameters of SSPP and SIW sections, respectively. The proposed hybrid SSPP-SIW diplexer is fabricated and measured. Simulated and measured results show good channel isolation, low return loss and low insertion loss in the required frequency bands.

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Yuan, Xiangtian, Jiaojiao Tian e Peter Reinartz. "Learning-Based Near-Infrared Band Simulation with Applications on Large-Scale Landcover Classification". Sensors 23, n. 9 (22 aprile 2023): 4179. http://dx.doi.org/10.3390/s23094179.

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Multispectral sensors are important instruments for Earth observation. In remote sensing applications, the near-infrared (NIR) band, together with the visible spectrum (RGB), provide abundant information about ground objects. However, the NIR band is typically not available on low-cost camera systems, which presents challenges for the vegetation extraction. To this end, this paper presents a conditional generative adversarial network (cGAN) method to simulate the NIR band from RGB bands of Sentinel-2 multispectral data. We adapt a robust loss function and a structural similarity index loss (SSIM) in addition to the GAN loss to improve the model performance. With 45,529 multi-seasonal test images across the globe, the simulated NIR band had a mean absolute error of 0.02378 and an SSIM of 89.98%. A rule-based landcover classification using the simulated normalized difference vegetation index (NDVI) achieved a Jaccard score of 89.50%. The evaluation metrics demonstrated the versatility of the learning-based paradigm in remote sensing applications. Our simulation approach is flexible and can be easily adapted to other spectral bands.

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Mu, Ruonan, Yongle Wu, Leidan Pan, Wei Zhao e Weimin Wang. "A Miniaturized Low-Loss Switchable Single- and Dual-Band Bandpass Filter". International Journal of RF and Microwave Computer-Aided Engineering 2023 (18 agosto 2023): 1–8. http://dx.doi.org/10.1155/2023/9025980.

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In this paper, a novel switchable bandpass filter is proposed. By switching p-i-n diodes on/off, the proposed filter can be switched between the single-band bandpass filter and the dual-band bandpass filter. The filter is mainly composed of eight pairs of series LC resonators, which generate passbands and transmission zeros. Considering the requirement of miniaturization and low cost, the filter is realized by interdigital capacitors and microstrip section inductors. The layout is designed by 3D simulation software HFSS, and the active part is designed by ADS software. The proposed filter has a compact structure, and its size is only 22.20 mm × 25.66 m m. For a demonstration, a switchable bandpass filter has been designed, fabricated, and measured. The simulated and measured results have a good agreement.

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Jiang, Yun, Yuan Ye, Daotong Li, Zhaoyu Huang, Chao Wang, Jingjian Huang e Naichang Yuan. "Design of W-band PIN Diode SPDT Switch with Low Loss". Applied Computational Electromagnetics Society 36, n. 7 (19 agosto 2021): 901–7. http://dx.doi.org/10.47037/2021.aces.j.360712.

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A W-band PIN diode single pole double throw (SPDT) switch with low insertion loss (IL) was successfully developed using a hybrid integration circuit (HIC) of microstrip and coplanar waveguide (CPW) in this paper. In order to achieve low loss of the SPDT switch, the beam-lead PIN diode 3D simulation model was accurately established in Ansys High Frequency Structure Simulator (HFSS) and the W-band H-plane waveguide-microstrip transition was realized based on the principle of the magnetic field coupling. The key of the proposed method is to design the H-plane waveguide-microstrip transition, it not only realizes the low IL of the SPDT switch, but also the direct current (DC) bias of the PIN diode can be better grounded. In order to validate the proposed design method, a W-band PIN diode SPDT switch is fabricated and measured. The measurement results show that the IL of the SPDT switch is less than 2 dB in the frequency range of 85 to 95 GHz, while the isolation of the SPDT switch is greater than 15 dB in the frequency range of 89.5 to 94 GHz. In the frequency range of 92 to 93 GHz, the IL of the SPDT switch is less than 1.65 dB, and its isolation is higher than 22 dB. Switch rise time and switch fall time of the SPDT switch are smaller than 29ns and 19ns, respectively. Good agreement between the simulations and measurements validates the design method.

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41

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Ma, Yalin, Wenjie Feng, Wenquan Che e Jianxin Chen. "Low-loss tunable tri-pole band-pass filter using crossed resonator". Journal of Electromagnetic Waves and Applications 30, n. 2 (14 dicembre 2015): 251–58. http://dx.doi.org/10.1080/09205071.2015.1105156.

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Zhang, Naibo, Ruiliang Song, Mingjun Hu, Guangcun Shan, Chunting Wang e Jun Yang. "A Low-Loss Design of Bandpass Filter at the Terahertz Band". IEEE Microwave and Wireless Components Letters 28, n. 7 (luglio 2018): 573–75. http://dx.doi.org/10.1109/lmwc.2018.2835650.

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Guo, Min, Qiang Chen, Di Sang, Yuejun Zheng e Yunqi Fu. "Dual-Polarized Dual-Band Frequency Selective Rasorber With Low Insertion Loss". IEEE Antennas and Wireless Propagation Letters 19, n. 1 (gennaio 2020): 148–52. http://dx.doi.org/10.1109/lawp.2019.2956230.

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Jost, M., C. Weickhmann, S. Strunck, A. Gäbler, C. Fritzsch, O.H. Karabey e R. Jakoby. "Liquid crystal based low‐loss phase shifter for W‐band frequencies". Electronics Letters 49, n. 23 (novembre 2013): 1460–62. http://dx.doi.org/10.1049/el.2013.2830.

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