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Waveguide, antenna and vehicular radar apparatus

Patent Number: 8446233
Publication Date: 2013-05-21
Inventor:

A waveguide, that is improved in size, costs, manufacturing and in durability, has a base having a mounting surface, and a plate member held on the mounting surface of the base for defining a waveguide in cooperation with the base. The mounting surface of the base is a curved surface defined by a sweep of a flexure curve of the plate member when it is loaded along a straight line. The plate member is attached to the base in such a manner that the plate member is pressed against and curved ...

Ultra-wideband tunable filters based on multi-resolution band-selection

Patent Number: 8446232
Publication Date: 2013-05-21
Inventors: ;

Devices and methods for tunable RF filtering. Multiple bimodal filter stages are used within a filter device to provide for tunable frequency response of the filter device. The use of M sequential bimodal filter stages, each having different frequency resolutions, may allow for 2^Mpossible modes of ...

High-frequency filter

Patent Number: 8446231
Publication Date: 2013-05-21
Inventor:

One embodiment of a high-frequency filter includes a band-rejection filter including a plurality of reflection-type resonance elements and a filter circuit element provided between the reflection-type resonance elements, wherein an electrical length between the reflection-type resonance elements between which the filter circuit element is provided is an odd multiple of 90 degrees in a rejection band of the band-rejection ...

Microwave directional coupler

Patent Number: 8446230
Publication Date: 2013-05-21
Inventors: ;

Directional couplers are provided. In one embodiment, the directional coupler includes first and second transmission line segments positioned on a first plane and spaced apart by a first distance, third and fourth transmission line segments positioned on a second plane and spaced apart by a second distance, the second plane spaced apart from the first plane, a first conductive segment connecting the first and third transmission line segments, and a second conductive segment connecting the ...

System and method for reduced area tunable capacitors

Patent Number: 8446229
Publication Date: 2013-05-21
Inventors: ;

Embodiments of a capacitive tuning system implementing a tunable capacitive array are presented herein. The tunable capacitive array includes both scaled coarse capacitors and one or more fine capacitors. The one or more fine capacitors advantageously reduce a differential nonlinearity associated with the scaled coarse capacitors. The use of fine capacitors limits additional area requirements in an integrated circuit implementation, while improving the accuracy of the capacitive tuning ...

Input/output system and devices for use with superconducting devices

Patent Number: 8441329
Publication Date: 2013-05-14
Inventors: ; ;

An I/O system and device for use with superconducting device provides multi-stage filtering using superconducting electrical pathways, while providing good thermal conductivity to maintain low temperature of the various components and allowing the easy mounting and dismounting of a device sample from a refrigerated environment. Filtering may include a lumped element filter assembly including multiple plates each carrying a number of lumped element filters. Filtering may include a metal ...

Electrostatic switch for high frequency and method for manufacturing the same

Patent Number: 8441328
Publication Date: 2013-05-14
Inventor:

An electrostatic switch for high frequency and a method for manufacturing the same are disclosed. The electrostatic switch for high frequency in accordance with an embodiment includes: a first substrate module including a first substrate, an electrode part and a pair of CoPlanar Waveguides (CPWs), the electrode part being installed on the first substrate, the pair of CPWs being formed on either side of the electrode part and guiding an RF signal to travel; and a second substrate module ...

Printed circuit board

Patent Number: 8441327
Publication Date: 2013-05-14
Inventors: ;

A printed circuit board includes an insulation layer and a signal layer attached to the insulation layer. The signal layer includes a pair of differential transmission lines. Width W of each of the differential transmission lines is changed according to change of space S between the differential transmission lines, based on the following formula:

$W = C ...$

Method for designing an electronic circuit

Patent Number: 8441326
Publication Date: 2013-05-14
Inventor:

An electronic circuit and method for designing an electronic circuit is provided that includes a first source element, a second source element, a first matching network, and a second matching network. The first matching network and the second matching network are designed by means of a method using the Poincaré distance, in which the second source element is designed to output a signal with a center frequency, in which the load has a load impedance, in which the second matching network has ...

Isolator with complementary configurable memory

Patent Number: 8441325
Publication Date: 2013-05-14
Inventor:

An isolator that includes first and second substantially identical circuitry galvanically isolated from each other and each having at least one communications channel thereon for communicating signals across an isolation boundary therebetween and each of said first and second circuitry having configurable functionality associated with the operation thereof. A coupling device is provided for coupling signal across the isolation boundary between the at least one communication channels of the ...

Semiconductor device and communication apparatus

Patent Number: 8436699
Publication Date: 2013-05-07
Inventor:

A semiconductor device includes: a transmission line including a capacitor section and an inductor section arranged on a semiconductor substrate, and a junction of the semiconductor substrate and one of the capacitor section and the inductance section, wherein a transmission characteristic of the transmission line is determined by a voltage applied to the ...

MEMS-based tunable filter

Patent Number: 8436698
Publication Date: 2013-05-07
Inventor:

A filter device is provided including a substrate (302) and a plurality of horizontal gap closing actuator (GCA) devices (550) disposed on a first surface of the substrate. The plurality of GCA devices includes and one or more GCA varactors (700). Each one of the plurality of horizontal GCA devices includes at least one drive comb structure (602a, 602b, 702a, 702b), at least one input/output (I/O) comb structure ...

Surface acoustic wave filter device

Patent Number: 8436697
Publication Date: 2013-05-07
Inventor:

A small-sized surface acoustic wave filter device having favorable filter characteristics includes a transmission-side surface acoustic wave filter chip including a ladder surface acoustic wave filter unit located on a piezoelectric substrate. The ladder surface acoustic wave filter unit includes a series arm connected between an input pad and an output pad and a plurality of resonators and including at least one first resonator connected to the input pad or the output pad. A die-attach ...

Surface acoustic wave device and communication device

Patent Number: 8436696
Publication Date: 2013-05-07
Inventor:

On a piezoelectric board, a SAW element has first to fifth IDT electrodes and reflector electrodes with first to fourth electrode-finger narrow-pitch portions N1-N4 being formed in the respective ones of adjoining portions of the respective first to fifth IDT electrodes. An unbalanced signal terminal and balanced signal terminals are connected to the SAW element. The electrode finger pitches of the first to fourth electrode-finger narrow-pitch portions N1-N4 are ...

Imbalance detection and reduction for wideband balun

Patent Number: 8436695
Publication Date: 2013-05-07
Inventor:

A circuit converts a single-ended signal to differential signals that are balanced to have the same amplitudes and opposite phases. The circuit includes a balance tunable balun, a detector, and a controller. The balance tunable balun has a primary winding, a secondary winding, a control input, and a switched resistor-capacitor (RC) network. The primary winding receives the single-ended signal and the secondary winding outputs the differential signals. The control input receives a control ...

Load-line adaptation

Patent Number: 8436694
Publication Date: 2013-05-07
Inventor:

According to the general concept disclosed herein, a circuit for adaptive matching of a load impedance to a predetermined load-line impedance of a load-line connected to a power amplifier output includes a fixed matching network between the power transistor and an adaptive matching network, whereby the fixed matching network acts as an impedance inverter which results in a relatively low insertion loss at high power. Results indicate that the impedance-inverting network can be used over ...

Filter-tracking and control method

Patent Number: 8436693
Publication Date: 2013-05-07
Inventors: ;

A method to track and control the resonance frequency of a band-pass filter provides a solution for the sensitivity limitations against temperature and process variations. A phase sensing module obtains the phase difference between the input and output and a negative feed-back control architecture can be used to tune the filter's resonance over the input RF ...

EMI trap using microwave circuit

Patent Number: 8436692
Publication Date: 2013-05-07
Inventor:

In one example embodiment, a transmitter comprises a first component coupled to receive a signal for transmission and a second component communicatively coupled to the first component to transmit the signal over a transmission medium. The transmitter further comprises a planar transmission line formed on a substrate and disposed between the first and second components to couple the signal from the first component to the second component. The planar transmission line includes a first ...

Signal transmission apparatus

Patent Number: 8436691
Publication Date: 2013-05-07
Inventor:

A signal transmission apparatus includes two circuit layers. First and second ground sheets each has a rectangular area are arranged in the two circuit layers respectively. A third ground sheet is arranged between the two circuit layers. A differential pair includes a transmission line arranged between the first and third ground sheets and a transmission line arranged between the second and third ground sheets. The first to third ground sheets have same electric potential. Projections of ...

Multiple-membrane flexible wall system for temperature-compensated technology filters and multiplexers

Patent Number: 8432238
Publication Date: 2013-04-30
Inventors: ; ;

The present invention relates to a flexible cap system optimized for thermally-compensated technology microwave resonators. More specifically, this invention proposes a multiple-membrane flexible wall system for thermally-compensated filters and OMUX. The use of a multi-membrane flexible wall, in particular as sealing cap for a resonant cavity of an OMUX channel, makes it possible: to reduce the thermal resistance of the flexible wall, while maintaining an equivalent level of mechanical ...

Output circuit with integrated impedance matching, power combining and filtering for power amplifiers and other circuits

Patent Number: 8432237
Publication Date: 2013-04-30
Inventors: ; ;

An output circuit with integrated impedance matching, power combining, and filtering and suitable for use with power amplifiers and other circuits is described. In an exemplary design, an apparatus may include first and second circuits (e.g., power amplifiers) and an output circuit. The first circuit may provide a first single-ended signal and may have a first output impedance. The second circuit may provide a second single-ended signal and may have a second output impedance. The output ...

Compact highly integrated electrical module with interconnection of BAW filter and balun circuit and production method

Patent Number: 8432236
Publication Date: 2013-04-30
Inventor:

A highly integrated electrical module is specified which comprises a filter circuit and a balun circuit. The space requirement is reduced by circuit components of the balun circuit being arranged at least in part on an inner side of the housing of the filter ...

Coupler and communication system

Patent Number: 8432235
Publication Date: 2013-04-30
Inventors: ;

A coupler includes a first conductive pattern provided on a substrate having insulating property, a second conductive pattern provided on the substrate and placed in opposition to the first conductive pattern, a third conductive pattern provided on the substrate, a fourth conductive pattern provided on the substrate and placed in opposition to the third conductive pattern, a ground potential portion placed around positions on the substrate where the first conductive pattern, the second ...

Method and apparatus for tuning antennas in a communication device

Patent Number: 8432234
Publication Date: 2013-04-30
Inventors: ; ;

A system that incorporates teachings of the present disclosure may include, for example, a matching network for a communication device having first and second antennas, where the matching network includes a first variable component connectable and a detector. The first variable component can be connectable along a first path between the first antenna and a front end module of the communication device, where the first antenna is configured for transmit and receive operation. The detector can ...