Filters








8,990 Hits in 5.9 sec

Design and simulation of active frequency tripler with efficient and low spurious response

Behbod Ghalamkari, Abbas Mohammadi, Abdolali Abdipour
2008 2008 International Conference on Microwave and Millimeter Wave Technology  
A quantitative analysis, leading to the design and optimization of an active microwave frequency tripler is presented in this paper.  ...  Optimum matching networks are developed which produced a stable design with conversion gain up to 2.5 dB for specific biasing condition.  ...  As it can be seen both of them are below -12 dBm, so the input and output matching are exactly good. Moreover, input and output VSWR of the active frequency tripler are shown in Fig. 6 .  ... 
doi:10.1109/icmmt.2008.4540822 fatcat:trr4lomthjhnjcpgqbdibjfrri

Advanced Technique for Optimization of Active Frequency Multiplier Utilizing Harmonic Terminating Impedances with DGS

Petr Kutin, Tomas Urbanec
2006 2006 International Conference on Microwaves, Radar & Wireless Communications  
A novel method for the optimization of the active frequency multiplier utilizing the harmonic terminating impedances with the defected ground structures (DGS) has been developed.  ...  To our knowledge, in the considered frequency range, these results represent the best performance reported up to date for the active frequency multipliers utilizing the low-cost BJTs.  ...  Acknowledgements The research described in the paper was supported by the Czech Grant  ... 
doi:10.1109/mikon.2006.4345383 fatcat:ne7lszjpozgkdc7siemtsu553a

High power, high conversion gain frequency doublers using SiC MESFETs and AlGaN/GaN HEMTs

Kelvin Yuk, G.R. Branner, Claudia Wong
2010 2010 IEEE MTT-S International Microwave Symposium  
Synthesis of these impedances using matching and reflector networks have produced doublers with increased output power, conversion gain and very high suppression of the first and third harmonics.  ...  A method of determining the optimal harmonic terminations using accurate nonlinear computer models and load-and source-pull simulations is described.  ...  One aspect of the development of active, high power frequency multipliers with high conversion gain is motivated by the desire to combine the functionality of the passive multiplier with the output PA.  ... 
doi:10.1109/mwsym.2010.5517565 fatcat:wilt5xme4zculnqob447tahzym

Parasitics Impact on the Performance of Rectifier Circuits in Sensing RF Energy Harvesting

Antonio Alex-Amor, Javier Moreno-Núñez, José M. Fernández-González, Pablo Padilla, Jaime Esteban
2019 Sensors  
New light is shed on the design process, paying special attention to the nonlinearity of the circuits and the modeling of the parasitic elements.  ...  Two different configurations are tested: a Cockcroft–Walton multiplier and a half-wave rectifier. Several combinations of diodes, capacitors, inductors and loads were studied.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/s19224939 pmid:31766171 pmcid:PMC6891323 fatcat:x5usd6a7cra6rmqqlzfbz4haya

The Design of Terahertz Monolithic Integrated Frequency Multipliers Based on Gallium Arsenide Material

Jin Meng, Luwei Qi, Xiaoyu Liu, Jingtao Zhou, Dehai Zhang, Zhi Jin
2020 Micromachines  
Such frequency multiplier sources could be widely used in terahertz imaging, radiometers, and so on.  ...  A global design method for a terahertz monolithic integrated frequency multiplier is proposed.  ...  It provides a technical proposal to overcome the difficulties that exist in the hybrid integrated circuit and makes it possible for multipliers to work at a higher frequency.  ... 
doi:10.3390/mi11030336 pmid:32213929 fatcat:fvjviwnqarc6pjyzat72npgfyu

Optimal Design of S Band with Graphene Frequency Multiplier [chapter]

Huili Chen, Yong Fang, Xiaoling Zhong, Qingyan Song, Xueshi Hou, Haoxuan Sheng
2019 Lecture Notes in Electrical Engineering  
A graphene frequency multiplier is proposed in this paper.The nonlinear characteristics of Graphene are similar to the reverse parallel diode.In order to improve the efficiency of GFM,we use the method  ...  of recovering the fundamental and fifth harmonic wave which utilizes the way of branch recovery.According to this mechanism,a S band graphene frequency multiplier is designed.During the working frequency  ...  frequency multiplier was manufactured and tested. 2.Explanation of the GFT Analysis of the nonlinear characteristics of GFM The AC current of the graphene's electron nonlinear behavior can be expressed  ... 
doi:10.1007/978-981-13-6508-9_73 fatcat:ttsy5stiufhlbigqdl7aswjqxy

A Single Parameter Voltage Adjustable Immittance Topology for Integer-and Fractional-Order Design Using Modular Active CMOS Devices

Roman Sotner, Jan Jerabek, Ladislav Polak, Roman Prokop, Winai Jaikla
2021 IEEE Access  
Model for small-signal parasitic analysis of real behavior of the capacitance multiplier: a) circuit, b) simplified diagram of expected impedance magnitude.  ...  The maximum available gain of the voltage transfer has also an impact on the frequency bandwidth when the impedance magnitude is increasing above the known value of the terminal impedance of the input  ...  Author Name: Preparation of Papers for IEEE Access (February 2017) VOLUME XX, 2017 9  ... 
doi:10.1109/access.2021.3081140 fatcat:2fmzgzzctndshpfdwswrujb4be

A Novel HBT Frequency Doubler Design for Millimeter-Wave Applications

Tom Johansen, Viktor Krozer, Jens Vidkjaer, Torsten Djurhuus
2006 2006 International Workshop on Integrated Nonlinear Microwave and Millimeter-Wave Circuits  
Preliminary measurements on a frequency doubler implemented in a high-speed InP DHBT technology demonstrates an increase in the maximum output power from -14 dBm to -11.5 dBm at an input frequency of 31.4  ...  In this paper we present a novel HBT frequency doubler design for millimeter-wave application.  ...  FREQUENCY DOUBLER THEORY A simplified nonlinear model of a HBT frequency doubler with its embedded impedances is shown in Fig. 1 .  ... 
doi:10.1109/inmmic.2006.283521 fatcat:w46vj6cnhvbahkielv3d5as6ri

Analog Multipliers-Based Double Output Voltage Phase Detector for Low-Frequency Demodulation of Frequency Modulated Signals

Roman Sotner, Ladislav Polak, Jan Jerabek, Jiri Petrzela, Vilem Kledrowetz
2021 IEEE Access  
and without influence on biasing conditions (input/output resistance, linearity, etc.) of the used active deviceno bias current adjustment used as typical in standard concepts of OTAs, 2) high input impedance  ...  when tuned Matching of parameters in design not required High input impedance Linear processing of levels at least hundreds of mV [48] 2 1 (C) No No bipolar bias current linear No No Yes  ... 
doi:10.1109/access.2021.3092525 fatcat:c652ulnbhnaj7hysevkz7vbqm4

A High-Power Broadband Passive Terahertz Frequency Doubler in CMOS

Ruonan Han, Ehsan Afshari
2013 IEEE transactions on microwave theory and techniques  
The structure is based on a compact partially coupled ring that simultaneously achieves isolation, matching, and harmonic filtering for both input and output signals at and .  ...  Using the proposed circuit, a passive 480-GHz frequency doubler with a measured minimum conversion loss of 14.3 dB and an unsaturated output power of 0.23 mW is reported.  ...  Fig. 11 . 11 Half-circuit analysis of the matching scenario and the simulated impedance transformation shown on a Fig. 12 . 12 Large-signal -parameter simulations of the entire 480-GHz frequency doubler  ... 
doi:10.1109/tmtt.2013.2243465 fatcat:352x54jg2rd2zjjlxvl5hgdgda

Downconverting Module Architectures for High Performance Multipixel Cameras

Diego Palombini, Maciej Jankowski, Ernesto Limiti
2013 International Journal of Microwave Science and Technology  
: design and performance of two compact test vehicles in MMIC technology, both operating in the Q-band frequency range with ultrabroadband IF section, are reported.  ...  Difficulties in the generation and proper distribution to each pixel of the local oscillator signal still limit their use to frequency ranges below a few GHz or at least seriously affect the complexity  ...  separating the nonlinear operation of the two multiplying sections from the LO input of the mixer. 3.2.  ... 
doi:10.1155/2013/586158 fatcat:szgrqjnxojc23c5qhdwcaqmfze

Heterostructure-barrier-varactor design

J. Stake, S.H. Jones, L. Dillner, S. Hollung, E.L. Kollberg
2000 IEEE transactions on microwave theory and techniques  
In this paper, we propose a simple set of accurate frequency-domain design equations for calculation of optimum embedding impedances, optimum input power, bandwidth, and conversion efficiency of heterostructure-barrier-varactor  ...  A set of modeling equations for harmonic balance simulations of HBV multipliers are also given.  ...  In our analysis, we use a two-element model of the HBV multiplier: a nonlinear (differential) elastance in series with a nonlinear parasitic resistance .  ... 
doi:10.1109/22.841959 fatcat:avnijvmw6nddhf5vuj24sv5rgu

Modeling and design aspects of millimeter-wave and submillimeter-wave Schottky diode varactor frequency multipliers

J. Grajal, V. Krozer, E. Gonzalez, F. Maldonado, J. Gismero
2000 IEEE transactions on microwave theory and techniques  
The limiting effects of multiplier performance such as breakdown, forward conduction, or saturation velocity are discussed in view of the optimum circuit conditions for multiplier operation including bias  ...  Design and optimization of Schottky varactor diode frequency multipliers for millimeter and submillimeter wavelengths are generally performed using harmonic balance techniques together with equivalent-circuit  ...  The HBM depends critically on the accuracy of the nonlinear element model employed in the analysis. This model must be valid for a wide range of frequencies, drive levels, and embedding impedances.  ... 
doi:10.1109/22.841962 fatcat:ngzuu4m6sbaeli6wcns4nu4esu

THE RESEARCH OF W-BAND HIGH ORDER FREQUENCY MULTIPLIER BASED ON AVALANCHE DIODE

Lingling Song, Minghua Zhao
2018 Progress In Electromagnetics Research Letters  
A research of millimeter wave high order frequency multiplier based on the fierce inductive nonlinearity of avalanche diode is presented.  ...  The characteristic of multiplier circuit is also discussed.  ...  Because the input RF signal is operated at microwave band, the input microstrip circuit is matched to the avalanche diode with resistance of R 1 and reactance of X 1 at input frequency range.  ... 
doi:10.2528/pierl17092109 fatcat:h2l52jsiwrgzfexwl7aajjpbqa

Millimeter-wave diode-grid frequency doubler

C.F. Jou, W.W. Lam, H.Z. Chen, K.S. Stolt, N.C. Luhmann, D.B. Rutledge
1988 IEEE transactions on microwave theory and techniques  
Abstruct-Monolithic diode grids have been fabricated on 2-cm square gallium-arsenide wafers in a proof-of-principle test of a quasi-optical varactor millimeter wave frequency multiplier array concept.  ...  The excellent agreement between experiment and the predictions of the theoretical model provide confidence in predictions of achievable CW output power levels of 2.5 W at a frequency of 188 CHz with an  ...  An equivalent circuit model based on a transmission-line analysis of plane wave illumination, in conjunction with computer-aided analysis of the nonlinear varactor impedance, was used to predict the doubler  ... 
doi:10.1109/22.8914 fatcat:jqh6u4yajnfgfhtwanzq4ut5re
« Previous Showing results 1 — 15 out of 8,990 results