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Showing 1 to 6 of 6 for “"polyphase filter"”.
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A 5-6 Ghz Silicon-Germanium Vco With Tunable Polyphase Outputs
… voltage controlled oscillator (VCO) with tunable polyphase outputs. Circuits were designed and fabricated using the Motorola 0.4 ìm CDR1 SiGe BiCMOS process, which has four interconnect metal layers and a thick copper uppermost bump layer for high-quality radio frequency (RF) passives. The VCO …
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On the Use of Uncalibrated Digital Phased Arrays for Blind Signal Separation for Interference Removal in Congested Spectral Bands
… into orthogonal narrow-band partitions using a polyphase filter-bank channelizer, and a rank-reduced version of the received matrix on each sub-channel is computed through reconstruction by retaining a subset of its singular values. The wideband spectrum is synthesized through a near-perfect …
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Design and Characterization of RFIC Voltage Controlled Oscillators in Silicon Germanium HBT and Submicron MOS Technologies
… VCOs and an integrated 5-6 GHz VCO with tunable polyphase outputs. Each VCO is designed around a differential -G_{M} core with an LC tank circuit. The circuits exploit two Si-based device technologies: Silicon Germanium (SiGe) Heterojunction Bipolar Transistors (HBTs) for a cross-coupled …
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Microwave CMOS Beamforming Transmitters
… Therefore, in Paper V a three-stage active polyphase filter with quadrature output signals, high operation frequency, and wide bandwidth is analyzed. Analytical equations for both voltage gain and phase transfer function of a loaded stage are derived. The filter shows robustness against …
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A jam-resistant CubeSat communications architecture
… diversity. This spatial diversity allows spatial filtering to occur, which modifies the array's radiation pattern to mitigate interference, add gain to the main lobe, or add multiple beams. The system is designed with the goal of minimizing cost and development time, and two ways of accomplishing …
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Integrated Wideband Self-Interference Cancellation Techniques for FDD and Full-Duplex Wireless Communication
… path containing a 5-tap analog adaptive filter (AF) between the transmitter (TX) output and the receiver (RX) input; (2) a second cancellation path containing a 14-tap low-frequency AF with a point of injection at the RX baseband output; (3) a phase noise cancellation method which reduces …