Abstract:
A filter and a method of making a filter to remove unwanted frequency harmonics associated with current filters. The filter is made up of resonators (#1, #2, #3) such that the filter resonates a design frequency. Whereby, at least two resonators are coupled together between an input (I/O) and an output (I/O) and at least one of the resonators is of a different design from other resonators, such that the resonator of a different design resonates the same design frequency as the other resonators and resonates different higher order harmonic frequencies than the other resonators. The present invention also provides methods of improving skirt response for a filter, as well as other response properties of the filter.
Abstract:
It is provided a waveguide E-plane band-pass filter comprising a tubular, electrically conductive waveguide body. An electrically conductive foil is arranged in the waveguide body and extending along a longitudinal direction of the waveguide body, the foil comprising a plurality of resonator openings. Furthermore, the waveguide body comprises at least one ridge protruding from an inner wall of the waveguide body and extending longitudinally along the longitudinal direction of the waveguide body. The foil is in mechanical contact with said at least one ridge and arranged to divide an inner volume of the waveguide body into two portions. It is also provided a diplexer, a radio transceiver, and a method for filtering a signal using such a filter.
Abstract:
본 발명은 낮은 주파수 대역의 필터링에 분포정수형으로 형성된 저역통과필터를 사용하고, 높은 주파수 대역에 커패시터를 사용하여 낮은 주파수 대역에서 발생하는 하모닉을 제거한다. 또한, 저역통과필터의 일단에 위치하는 커패시터 요소의 크기, 지름 또는 형태를 다른 커패시터 요소들과 다르게 하여 일단에 위치하는 커패시터 요소의 커패시턴스 값을 다른 커패시터 요소들의 커패시턴스 값보다 작게 형성하여 주파수 간의 위상 매칭을 잘 이루어지게 한다. 이로 인하여, 하나의 멀티플렉서로 종래의 멀티플렉서가 구현할 수 있던 주파수의 대역보다 넓은 범위의 주파수 대역을 이용할 수 있도록 하여 통신 시스템에 필요한 장치와 설비의 간소화와 간소화에 따른 비용의 절감을 이룰 수 있는 저역통과필터 및 그를 이용한 멀티플렉서에 관한 것이다.
Abstract:
Systems and methods are disclosed herein to a power factor adjuster comprising: a power factor measurement unit configured to measure the power factor on an input line to a load and generate a power factor correction signal based on the measured power factor; and a power factor adjustment unit connected to the power factor measurement unit comprising: a fixed capacitor connected in series to a first switching device; and an adjustable element having a variable capacitance connected in parallel to the fixed capacitor and in series to a second switching device, wherein the overall capacitance of the power factor adjustment unit is adjusted by adjusting the capacitance of the adjustable element or by toggling the first and second switching devices in response to the power factor correction signal.