This paper presents a high-performance substrate-integrated-waveguide RF microelectromechanical systems (MEMS) tunable filter for 1.2&x2013;1.6-GHz frequency range. The proposed filter is developed using packaged RF MEMS switches and utilizes a…
Papers in Antennas and Propagation
Antennas and Propagation papers in Electrical and Electronic Engineering, A
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A 1.5-GHz low noise amplifier (LNA), intended for use in a global positioning system (GPS) receiver, has been implemented in a standard 0.6-μm CMOS process. The amplifier provides a forward gain (S21) of 22 dB with a noise figure of only 3.5 dB…
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This paper presents a novel phased-array antenna system with multifrequency, full-duplex operation, and wide-beam scanning. The system consists of a wideband power divider, a low-loss and low-cost multiline phase shifter controlled by dual…
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This paper describes a voltage regulator system for ultra-low-power RFID tags (also called passive tags) in a 0.15 mum analog CMOS technology. These tags derive their power supply from the incoming RF energy through rectification instead of from a…
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A 160-GHz downconversion front-end for imaging arrays fabricated in a SiGe HBT technology is presented. The front-end features a fully differential architecture compatible with balanced on or off-chip antennas consisting of a three-stage LNA with 24…
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Two- and three- stage high voltage/high power (HiVP) amplifiers have been designed, implemented, and measured using a 0.12 ??m SiGe HBT process. The HiVP is a circuit configuration that allows for very large output voltage swings, leading to high…
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This paper presents new methodology of rectenna circuit conception. Succeeding sources theory, generally used for power electronics conversion, is presented here and integrated to rectenna circuit design. Circuit simulation based on good filter…
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A linear equalizer with 9dB of boost and a 1-tap speculative half-rate DFE compensate for 24dB of channel loss at 10GHz, generating an output with a BER less than 1012 and an eye opening of 0.32UI. The circuit consumes 40mW from a 1V supply at…
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The design of a 2D broadband, Luneburg lens antenna implemented using printed circuit board techniques is detailed. The refractive index of the lens is controlled through a combination of meandering crossed microstrip lines and varying their widths.…
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Recent advances in the medical field are spurring the need for ultra-low power transceivers for wireless communication with medical implants. To deal with the growing demand for medical telemetry, the FCC commissioned the medical implant…
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Design, fabrication, and test of a 25-element planar coupled oscillator based phased array is described. The array operates at S-band and is shown to produce an agile beam which is steerable via adjustment of the perimeter oscillator tuning biases…
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This paper presents a low power electrochemical interface circuit for amperometric sensors. The readout circuit with potentiostat design maintains a constant bias potential between the reference and working electrodes using one operational…
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This paper presents a state-off the art low-noise SiGe-amplifier (LNA) for the frequency range from 75 up to 85 GHz integrated in a 0.18mum BiCMOS technology (John et al., 2002 and 2006). The LNA shows noise figures of about 6.2 dB at 77 GHz and…
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This paper presents the first 77 GHz single-chip direct-conversion transceiver in silicon. The transceiver, fabricated in a 0.13 mum SiGe BiCMOS technology with of 170/200 GHz, consumes 740 mW, and occupies 1.3 mm x 0.9 mm. The receiver achieves…
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This paper describes a novel frequency-modulated continuous-wave radar concept, where methods like nonuniform sparse antenna arrays and multiple-input multiple-output techniques are used to improve the angular resolution of the proposed system. To…
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In this paper, we present the receiver and the on-chip antenna sections of a fully integrated 77-GHz four-element phased-array transceiver with on-chip antennas in silicon. The receiver section of the chip includes the complete down-conversion path…
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We describe the design, simulation, fabrication, and performance of a 96-GHz ortho-mode transducer (OMT) to be used for the Polatron-a bolometric receiver with polarization capability. The OMT has low loss, good isolation, and moderately broad…
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In this paper, an unsupervised change detection technique for synthetic aperture radar (SAR) images acquired on the same geographical area but at different time instances is proposed by conducting probabilistic Bayesian inferencing with expectation…
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A beam reconfigurable antenna based on folded dipole structure has been presented. The antenna can switch beams without the input impedance variation. The front-to-back ratio is measured as approximately 7dB. To implement the antenna, a bi-stable…
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This paper reports on the design and development of a dividing/phasing network for a compact switched-beam array antenna for land-vehicle mobile satellite communications. The device is formed by a switched radial divider/combiner and 1-bit phase…
Papers in associated sub-disciplines
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