Abstract:
The present invention includes a method of creating electrical air gap low loss low cost RF mechanically and thermally stabilized interdigitated resonate filter in photo definable glass ceramic substrate. Where a ground plane may be used to adjacent to or below the RF filter in order to prevent parasitic electronic signals, RF signals, differential voltage build up and floating grounds from disrupting and degrading the performance of isolated electronic devices by the fabrication of electrical isolation and ground plane structures on a photo-definable glass substrate.
Abstract:
Изобретение относится к поисково-спасательным средствам индикации местоположения летательного аппарата. Сигнальное устройство обозначения места аварии летательного аппарата содержит шар, выполненный с возможностью наполнения газом легче воздуха. К шару прикреплено радиопередающее устройство с электронной схемой управления, связанное с контейнером посредством гибкой связи. Сигнальное устройство снабжено автономным источником питания. Шар выполнен в виде легкой металлизированной оболочки, на которой выполнены резонансные структуры с возможностью переотражения радиосигнала в сторону источника излучения. Изобретение улучшает возможность обнаружения места аварии летательного аппарата.
Abstract:
A multiband antenna including a feed point, a helical radiating element galvanically connected to and fed by the feed point, the helical radiating element resonating in a Very High Frequency range and an elongate radiating element arranged coaxially within the helical radiating element and galvanically connected to and fed by the feed point, the elongate radiating element extending along only a portion of the helical radiating element, the elongate radiating element having a first resonant frequency and a second resonant frequency, the elongate radiating element operating as a quarter-wavelength monopole at the first resonant frequency and as an eighth- wavelength monopole at the second resonant frequency.
Abstract:
Aspects of the invention relate to methods and systems for monitoring and treating individuals with sensory processing issues (e.g., individuals with autism). In some embodiments, methods involve measurement of environmental conditions ( e.g ., sound, light, location, time of day, air quality, odors, radiation, magnetic field strength, temperature, humidity, pollutants, etc .) that are sensory inputs affecting an individual's ability to perform tasks and behave in a desired way; implementing interventions based on the measured conditions to help the individual improve performance and behavior; monitoring the extent of improvement resulting from the interventions; and modifying the interventions based on the extent of improvement. Systems configured for carrying out the methods are also provided.
Abstract:
A power amplifier controller circuit controls an adjustable impedance matching network at the output of a power amplifier to vary its load line to improve the efficiency of the RF PA. The PA controller circuit comprises an amplitude control loop that determines an amplitude correction signal. The amplitude loop is configured to control or correct for distortion from the adjustable matching network based upon the amplitude correction signal.
Abstract:
An antenna (10), consisting of a folded looped conductor (24) closed at a feedpoint (22). The antenna has at least two conductive arms (12, 14) extending from the feedpoint.
Abstract:
An electronically tunable quad band antenna includes a tunable high band antenna tuned by at least one varactor (130) associated therewith; the tunable high band antenna further includes a substrate (125), a patch element (1 10) on the substrate, at least one voltage tunable varactor (130) associated with the patch element, a DC bias point (1 15) on the patch element, an RF input (120) on the patch element and a temperature sensor (105) associated with the high band pass antenna.
Abstract:
A method (400) for allocating handoff of mobile stations (105, 110) to a first network node (115). The method can include receiving a handoff request for a first mobile station. Handoff of the first mobile station can be granted in response to determining that the first mobile station has an effective level of battery charge equal to or below a threshold value. Handoff of the first mobile station can be denied in response to determining that the first mobile station has an effective level of battery charge greater than the threshold value. The method also can include receiving status information (130) communicated by the first mobile station. The status information can indicate an effective battery level of the first mobile station. In another arrangement, the status information can indicate a handoff priority level of the first mobile station
Abstract:
A system (100) and method (300) of feedback transmitter power control can include a transmitter temperature detector such as a thermistor based temperature detector (118), a detector for detecting forward and reflected transmitter power (113 and 115), and a voltage controlled attenuator (120) placed in a radio frequency power control feedback path for modifying transmitter power based on a detected transmitter temperature and a detected forward and reflected transmitter power. The system can further include a logarithmic amplifier controller (122) in the feedback path coupled to the voltage controlled attenuator as well as a power amplifier (112) coupled to the voltage controlled attenuator. The system can operate in both analog and time division multiple access modes. The system can be active in real time throughout a push-to-talk session.