Abstract: Hybrid structures, filters and duplexers are disclosed. According to one aspect, a radio frequency (RF) duplexer includes a common resonator coupled to at least one chamber of an air cavity filter, a first ceramic waveguide filter. CWGF, having a first opening in a first CWG wall of the first CWGF, the first opening at least partially aligned with a first window of the common resonator to couple energy between the common resonator and the CWGF, and a second CWGF having a second opening in a second CWG wall of the second CWGF, the second opening at least partially aligned with the second window of the common resonator to couple energy between the air cavity resonator and the CWGF.

Abstract: The present disclosure provides a device for signal delay. The device comprises: a frame of insulation material; multiple signal electrodes provided in the frame and electrically connected to each other in series; an input terminal electrically connected to a first of the multiple signal electrodes and configured to receive an input signal; and an output terminal electrically connected to a second of the multiple signal electrodes and configured to output an output signal that is delayed by the multiple signal electrodes with respect to the input signal, wherein at least one of the multiple signal electrodes is located at a different height than those of other signal electrodes with respect to a surface on which the device is to be mounted.

Abstract: The liquid collection arrangement for collecting washing liquid that is used for washing the exterior of a four-wheeled vehicle comprises first and second liquid collection portions that can be arranged on the sides of the vehicle for collecting washing liquid running along the sides of the vehicle and third and fourth liquid collection portions that can be arranged in front of and behind the vehicle for collecting washing liquid running along the front and the rear of the vehicle, the liquid collection arrangement having a mounting mode, in which mode the liquid collection portions can be arranged around the vehicle without moving the vehicle, and a use mode, in which mode the liquid collection portions surround the vehicle.

Abstract: A base station includes multiple sector antenna units. Each sector antenna unit has an antenna for receiving a carrier signal associated with an antenna frequency in an available frequency band. The base station is converted between a multiple sector base station configuration and a multi-sector, omni-base station configuration. In a diversity base station implementation, each sector antenna unit receives a diversity signal from a first sector, and the second diversity antenna unit receives a diversity signal from a second different sector. If one sector antenna unit does not perform properly so that one of the sector diversity signals is lost or corrupted, the other sector diversity signal is still useable. The base station may be reconfigured to power-down at least some part of the transmit side without having to power-down some or all of the receive side.

Abstract: A base station includes multiple sector antenna units. Each sector antenna unit has an antenna for receiving a carrier signal associated with an antenna frequency in an available frequency band. The base station is converted between a multiple sector base station configuration and a multi-sector, omni-base station configuration. In a diversity base station implementation, each sector antenna unit receives a diversity signal from a first sector, and the second diversity antenna unit receives a diversity signal from a second different sector. If one sector antenna unit does not perform properly so that one of the sector diversity signals is lost or corrupted, the other sector diversity signal is still useable. The base station may be reconfigured to power-down at least some part of the transmit side without having to power-down some or all of the receive side.

Abstract: A transceiver system is described herein that has an antenna coupled to a filter unit which is coupled to multiple radio base stations (RBSs). Each RBS uses one TX/RX cable and if needed a RX cable to connect to the filter unit. To enable the RBSs so they can share one antenna, each RBS has a duplex filter incorporated therein. And, the filter unit has a unique combination of diplex filter(s), duplex filter(s), part-band duplex filter(s), diplex-duplex filter(s), splitter(s) and/or low noise amplifier(s). Four exemplary embodiments of the transceiver system are described herein to show how the filter unit can be configured so as to enable the RBSs to share one antenna even if the RBSs share the same frequency band and/or even if the RBSs operate with different radio standards (e.g., TDMA, CDMA, WCDMA and GSM). Also described herein in accordance with the present invention are: (1) a method for constructing the transceiver system; (2) a radio base station; and (3) an antenna.

Abstract: A filter includes a first end, a second end, a conducting casing, at least one central conductor, and connecting devices at each of the ends, the casing extending along an imaginary axis and intended to accommodate the conductor along this imaginary axis. The conductor is provided with capacitance generating portions and inductance generating portions. The connecting device at the first end of the filter includes a first connecting member connected to the casing and a second connecting member connected to the conductor, and the connecting device at the second end of the filter includes a third connecting member connected to the casing and a fourth connecting member connected to the conductor. Both the second and the fourth connecting members are provided integrally with the conductor.

Abstract: The present invention relates to an arrangement in a cavity filter for tuning the frequency relationship of the filter or its coupling coefficient factor. The arrangement includes a self-locking screw that can be fitted in the filter cavity, for instance in the center conductor, in the filter lid, or in some suitable place in the filter chassis. Tuning is effected by adjusting the position of the screw in relation to the center conductor or lid of the cavity filter. The screw can be made of metallic segments embedded in plastic, or made completely of metal, and provided with a radially through-penetrating slot. At least one part of the screw has a cross-sectional area whose extension perpendicular to the through-penetrating slot is slightly greater than in a direction along said slot.

Abstract: The present invention relates to a tuning device in radio filter equipment for mobile telephony in which one or more cavities in the equipment should be tuned to the right frequency. The invention also relates to a tuning plate including a number of such tuning devices. The tuning device preferably includes regular or square formed depressed parts in the tuning plate. The depressed part converges each to a square formed central plate which is provided with an elevation or bulb. By turning a tuning screw on the equipment a force is developed on the plate and the surrounding depressed parts. This implies that the tuning can be made automatically, more secure and with less risk for intermodulation.

Abstract: The present invention relates to an integrated radio unit used in radio base stations in mobile telephony. One housing is provided for all elements of an integrated radio unit, including a functional unit and a center conductor plate. The combination of the cover and base of the housing form protective cavities for the functional unit and, simultaneously, a cavity whose shape, in combination with the center conductor plate, helps form the filter characteristics of the integrated radio unit. The design of the housing reduces the need for extensive connections between elements and also provides a cavity which, in combination with the center conductor plate, will act as a filter.