Patent application number | Description | Published |
20080290962 | Radio frequency switch - An RF switch is provided. In the RF switch, a T-junction slot line has a horizontal slot line and a vertical slot line. An open-end circuit is provided at each end portion of the horizontal and vertical slot lines. A first transmission line delivers signals from and to one portion of the horizontal slot line, and a second transmission line delivers signals from and to the other portion of the horizontal slot line. A third transmission line delivers signals from and to the vertical slot line. A switching circuit selectively switches the signal path of the one or the other portion of the horizontal slot line to the vertical slot line according to an external switching control signal. | 11-27-2008 |
20080290963 | Radio frequency switch - An RF switch is provided. In the RF switch, a slot line is divided into a first slot line and a second slot line and an open-end circuit is provided at each end portion of the first and second slot lines. A first transmission line delivers signals from and to the first slot line, and a second transmission line delivers signals from and to the second slot line. A third transmission line delivers signals from and to the portion of the slot line that separates the first slot line from the second slot line. A variable sub open-end circuit portion includes at least one open-end circuit which is selectively switched to the first or second slot line according to an external switching control signal. | 11-27-2008 |
20090153271 | VARIABLE RADIO FREQUENCY BAND FILTER - A variable radio frequency band filter capable of varying the resonance frequency band comprises a housing having a support; a number of resonator rods arranged along the longitudinal direction of the housing; at least one tuning rod positioned on top of the resonator rods; a tuning support extending through the respective tuning rods along the longitudinal direction of the housing and adapted to slide on top of the respective resonator rods to vary the position of the tuning rods; and a frequency variation unit positioned on a lateral surface of the housing. The frequency variation unit being coupled to an end of the tuning support and adapted to vary the position of the tuning rods, as the tuning support is slid, according to the frequency band. | 06-18-2009 |
20090231815 | ENCLOSURE DEVICE OF WIRELESS COMMUNICATION APPARATUS - An enclosure device of a wireless communication apparatus, which has a tubular structure with increased heat dissipation not unknown heretofore. A section of the enclosure device has a polygonal or circular shape, such as a substantially cylindrical structure, and the enclosure, which has a plurality of radiation fins arranged on an outer surface of the enclosure in a vertical direction, is formed integrally with the radiation fins by using a compression method. Various communication devices of the wire communication apparatus are mounted on the interior of the enclosure. The structure is preferably formed by the radiation fins and exhibits an increased radiation effect than that of a structure where radiation fins are arranged side by side on a flat plane. | 09-17-2009 |
20110001580 | Variable phase shifter - A variable phase shifter is provided. In the variable phase shifter, a fixed substrate, which is a dielectric substrate, is fixedly mounted in a housing and has at least one arc-shaped microstrip line on one surface thereof. A rotation substrate, which is a dielectric substrate, is rotatably mounted in the housing, in contact with the other surface of the fixed substrate and has a slot line on the contact surface thereof. Microstrip-slot line coupling takes place between the microstrip line and the slot line even during rotation. Both ends of the microstrip line are connected to an output port of the variable phase shifter and the slot line is electrically connected to an input port of the variable phase shifter, for receiving an input signal. | 01-06-2011 |
20110006856 | MULTI-MODE RESONANT FILTER - Various multi-mode resonant filters including a housing having a cavity, are provided. The multi-mode resonant filters include a Dielectric Resonant (DR) element received in the cavity of the housing, and a plurality of transmission lines for connecting a point on one of a first axis, a second axis, and a third axis with a point on another axis. The first axis, the second axis, and the third axis are orthogonal to each other with respect to a center of the DR element. | 01-13-2011 |
20110111804 | Tower top amplifier directly and detachably attached to antenna - Disclosed is a tower top amplifier directly and detachably attached and electrically connected to an antenna of a base station for mobile communication. The tower top amplifier includes a tower top amplifying unit ( | 05-12-2011 |
20140091883 | MULTI-MODE RESONANT FILTER - Various multi-mode resonant filters including a housing having a cavity, are provided. The multi-mode resonant filters include a Dielectric Resonant (DR) element received in the cavity of the housing, and a plurality of transmission lines for connecting a point on one of a first axis, a second axis, and a third axis with a point on another axis. The first axis, the second axis, and the third axis are orthogonal to each other with respect to a center of the DR element. | 04-03-2014 |