Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"Baluns"”.
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CMOS bulk-driven mixers with passive baluns
… down-conversion mixers with on-chip transformer baluns in 0.18 μm CMOS is presented. Applying either the RF signal or the local oscillator (LO) signal to the bulk connection of the transistors allows the amplification and switching stages of a conventional mixer to be combined into a single …
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Design and integration techniques for compact, wideband and multi-functional baluns
… the ever-more crowded frequency spectrum. RF baluns, being a key front-end passive component in RF communications must meet these requirements, while effectively providing an impedance transformation and converting balanced-to-unbalanced RF signals. However, current balun technologies are …
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An investigation of series LC resonant circuits within a sleeve balun to achieve wideband operation
… used in antenna measurements. In general, baluns do perform well, but their performance is band-limited. Hence, for wider frequency bands, multiple baluns with different operating frequencies have to be used. This presents a major problem, especially in broadband antenna measurements. To …
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Linearized 4-7 GHz LC Tunable Filter with Active Balun in 0.18um SiGe BiCMOS
… thesis discusses the linearization of active baluns and presents a comparison between two 4 to 7 GHz tunable BPF designs with active baluns implemented in 0.18 μm SiGe BiCMOS technology. Fourth order filtering is achieved by subtracting two 2nd order LC-tanks. This approach allows 3-dB …
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Microwave CMOS VCOs and Front-Ends - using integrated passives on-chip and on-carrier
… carriers featuring high Q inductors and low loss baluns. The thesis starts with an introduction to wireless communication, receiver architectures, front-end receiver blocks, and low loss carrier technology, followed by the included papers. The six included papers show the capability of CMOS and …
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Development of harmonic suppressed reconfigurable fractal dipole antenna
… is worthwhile. Four sets of wideband tapered baluns with reduced sizes have been designed and tested as a matching circuitry in all the designed antennas. All baluns are found to perform well in terms of scattering parameters and power loss, despite having sizes of 25%, 50% and 75% smaller …
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Radio frequency direct-digital QPSK modulators in CMOS technology
… phase shifter followed by two 180° active baluns. One signal from the in-phase components and another from the quadrature-phase components are later selected by two PTL circuits according to the in-phase (I) and quadrature-phase (Q) digital data respectively. Finally the chosen signals are …
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Integration of broadband direct-conversion quadrature modulators
… boasts the inexpensive solution of integrated baluns, while the CMOS one utilizes a coil-transmission line hybrid transformer at its LO input to drive the switchable PP filters.
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Antenna systems research
… Terminal Antennas, - Transmission lines and baluns, - High Radar Cross Section Reflectors for Spaceborne Radar Calibration, - Miscellaneous Antenna Investigations. These investigations have resulted in various outcomes: in new antenna types and in improved antenna configurations; in improved …