Kowalczyk, CA
Anthony C. Kowalczyk, San Carlos, CA US
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20080316588 | APPARATUS AND METHOD FOR GENERATING AN RF SIGNAL - An apparatus for generating an RF signal is provided includes a driver configured to generate a timing control for two optical signals. The apparatus further includes at least one optical pulse source configured to generate the two optical signals based on the timing control. In addition, the apparatus includes a photodetector configured to receive the two optical signals as input and further configured to generate an RF signal based on the two optical signals. A method for generating an RF signal is also provided. | 12-25-2008 |
20100119239 | BIAS CONTROL APPARATUS AND METHOD FOR OPTICAL MODULATOR - Examples of apparatus and methods are provided for controlling a bias in an optical modulator. An exemplary apparatus may comprise an optical modulator operable to modulate an optical signal. The optical modulation apparatus may comprise a photodetector disposed to receive at least a portion of the modulated optical signal. The optical modulation apparatus may comprise a bias controller coupled to both the optical modulator and the photodetector. The bias controller may be configured to receive a dither signal and to produce a bias feedback signal for the optical modulator. The bias feedback signal may be based on a ratio between an odd order harmonic signal of the modulated optical signal and an even order harmonic signal of the modulated optical signal. | 05-13-2010 |
Bruce A. Kowalczyk, Redwood City, CA US
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20100190660 | Methods, Compositions And Libraries Pertaining To PNA Dimer And PNA Oligomer Synthesis - This invention pertains to the field of PNA dimer and PNA oligomer synthesis. | 07-29-2010 |
Krzysztof J. Kowalczyk, San Jose, CA US
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20100010740 | PERMISSION MODULE ON MOBILE COMPUTING DEVICE - A system, apparatus, and method for techniques to retrieve and process information from communication networks on a mobile computing device are described. The apparatus may include a first interface module to receive a query and to display results of said query. The results include location information of at least one entity associated with the query. The apparatus may include a second interface module to transfer the query to a data source server, receive the results from the data source server, and transfer the results to said first interface. Other embodiments are described and claimed. | 01-14-2010 |
Krzysztof J. Kowalczyk, San Francisco, CA US
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20100035596 | HANDHELD NAVIGATION UNIT WITH TELEPHONE CALL - A system, apparatus, and method for techniques to retrieve and process information from communication networks on a mobile computing device are described. The apparatus may include a first interface module to receive a query and to display results of said query. The results include location information of at least one entity associated with the query. The apparatus may include a second interface module to transfer the query to a data source server, receive the results from the data source server, and transfer the results to said first interface. Other embodiments are described and claimed. | 02-11-2010 |
Peter Kowalczyk, Berkeley, CA US
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20100254558 | LOUDSPEAKER WITH PASSIVE LOW FREQUENCY DIRECTIONAL CONTROL - A loudspeaker is provided that passively achieves a directional polar response at low frequencies with a high degree of attenuation between the front and the back of the loudspeaker. The loudspeaker | 10-07-2010 |
Richard Donald Kowalczyk, San Francisco, CA US
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20110050096 | ACTIVE ELECTRONICALLY STEERED CATHODE EMISSION - An active electronically steered cathode (AESC) applies one or more electromagnetic modes to an input cavity, similar to that used in an inductive output tube. The structure and superposition of these modes creates local electric field maxima, causing the electron emission site or sites to move or be distributed across the surface of the cathode. Changing the amplitude, phase, or frequency of the modes provides time-variable control of the electric field profile, thereby generating electronically steered electron beams. One embodiment employs a pair of orthogonal TM modes driven out of phase, causing the electric field maximum to rotate around an annular cathode, producing a helical beam. Slots in the control grid may be used to segment the helical beam into discrete bunches to provide additional density modulation. | 03-03-2011 |
20110050097 | HYBRID MODULATION IN AN EMISSION-GATED ELECTRON GUN - An apparatus and method of modulating an electron beam to induce a high degree of spatial bunching uses multiple control grids located in close proximity to an electron-emitting cathode. An RF field couples to the electron beam in the cathode-grid gap to induce velocity modulation. The electron beam then propagates through a first control grid, allowing the velocity modulation to induce spatial bunching. The electron beam then traverses a gap between the first grid and a second control grid and interacts with the RF field to induce further bunching of the beam. Simulations show that bunching factors of 50:1 may be achieved. | 03-03-2011 |
20110064414 | OVERMODED DISTRIBUTED INTERACTION NETWORK - An overmoded distributed interaction network is provided that generates high peak and average RF power amplification at high frequencies. A series of overmoded cavities are bounded by parallel or concentric grids that may be separated by metallic spacers adapted to function as a photonic bandgap circuit to suppress competing electromagnetic modes. The selected electromagnetic modes have wavelengths much shorter than the lateral dimension of the grids, allowing the beam-wave interaction to be distributed transversely for improved interaction efficiency. The grids may optionally be slotted and arranged to provide a serpentine traveling wave tube configuration. | 03-17-2011 |
Richard Donald Kowalczyk, San Mateo, CA US
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20080198970 | COMPACT SCANNED ELECTRON-BEAM X-RAY SOURCE - A compact, reliable scanning electron-beam x-ray source achieves reduced complexity and cost. In particular, the x-ray source includes an electron beam that is propagated parallel to an x-ray target and is swept across the target in response to a moving magnetic cross field. Rather than scanning the beam by deflecting it about a single point, the point of deflection is translated along the target length, dramatically reducing the volume of the device. The magnetic cross field is translated along the target length using either mechanical systems to move permanent magnets, or electrical systems to energize an array of electromagnets. | 08-21-2008 |
20080258624 | BOWTIE DEFLECTOR CAVITY FOR A LINEAR BEAM DEVICE - A resonant cavity with a bowtie shape supports an electromagnetic field used to deflect the trajectory of an electron beam passing through the cavity. The short transit time of the beam across the gap maintains the cavity fields at near-optimal phase, improving interaction efficiency even for relatively low-energy beams. High interaction impedance ensures good drive-power-to-deflection conversion efficiency. The uniform field achieved across the gap enforces uniform deflection across the beam profile to maintain beam quality. Multiple bowtie cavities can be arranged to allow arbitrary two-dimensional deflections. | 10-23-2008 |
20080258625 | METHOD AND APPARATUS FOR INTERACTION WITH A MODULATED OFF-AXIS ELECTRON BEAM - An output circuit for a microwave tube is provided that has generally high interaction impedance for good efficiency, has high average power capability, and is physically large for a given operating frequency. The output circuit is designed to operate in conjunction with an off-axis, bunched electron beam. Electromagnetic fields are applied to the region in which the electron beam propagates to impart an azimuthal velocity to the bunched electron beam. The electron bunches then interact synchronously with a resonant output structure to excite radio-frequency modes from which energy can be extracted and applied to a load. | 10-23-2008 |
Robert S. Kowalczyk, Valencia, CA US
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20110115882 | STEREO IMAGING MINIATURE ENDOSCOPE WITH SINGLE IMAGING CHIP AND CONJUGATED MULTI-BANDPASS FILTERS - A dual objective endoscope for insertion into a cavity of a body for providing a stereoscopic image of a region of interest inside of the body including an imaging device at the distal end for obtaining optical images of the region of interest (ROI), and processing the optical images for forming video signals for wired and/or wireless transmission and display of 3D images on a rendering device. The imaging device includes a focal plane detector array (FPA) for obtaining the optical images of the ROI, and processing circuits behind the FPA. The processing circuits convert the optical images into the video signals. The imaging device includes right and left pupil for receiving a right and left images through a right and left conjugated multi-band pass filters. Illuminators illuminate the ROI through a multi-band pass filter having three right and three left pass bands that are matched to the right and left conjugated multi-band pass filters. A full color image is collected after three or six sequential illuminations with the red, green and blue lights. | 05-19-2011 |
Tony C. Kowalczyk, Palo Alto, CA US
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20080226232 | OPTICAL DEVICE WITH REDUCED TEMPERATURE DEPENDENCE - Optical apparatus with improved center wavelength temperature stability. In an embodiment, an AWG has a plurality of slots inserted along the optical paths. The slots contain one or more compensation materials which collectively correct for an order Q temperature dependency of the AWG base material. Q>=2 or the number of compensation materials is at least 2 or both. | 09-18-2008 |