Abstract: The invention relates to a filter and a method for manufacturing a filter. The filter comprises a shell construction with a wall construction and a bottom portion, which form at least one section in the shell construction. The filter further comprises at least one resonator within a section of the shell construction. At least the bottom portion of the shell construction and one or more resonators, or at least the part thereof close to the bottom portion of the shell construction, are an integral unit extruded from the same basic block in one piece.

Abstract: An arrangement for measuring a condition of an antenna in a mobile telephone system has a radio equipment and a transmission line connecting the radio equipment to the antenna. The transmission line has opposite end sections, whereby one of the end sections of the transmission line is closer to the antenna than the other of the end sections of the transmission line. A masthead amplifier is at the one of the end sections of the transmission line, the masthead amplifier having first and second duplex filters, an RX branch, a TX branch and an amplifier element in the RX branch, wherein the RX branch, the TX branch and the amplifier element are between the duplex filters. The standing wave ratio is measured and a measuring value calculated therefrom within the one end section of the transmission line for measuring the condition of the antenna.

Abstract: The invention relates to a filter, a method of manufacturing a filter and a component of a filter shell construction. The filter involved is particularly a multi-circuit filter comprising a plurality of resonance circuits and a conductive shell construction (21) comprising a wall construction (22, 22a, 22b) having walls, and a first and second end which close the shell construction providing the shell construction with a section construction defined by the wall construction and the ends, the section construction comprising one or more sections. The filter also comprises resonance circuit resonators in the section construction of the shell construction (2) in one or more sections (11 to 14) thereof. The filter further comprises coupling adjusting elements for adjusting the couplings between the different resonance circuits of the filter.

Abstract: The invention relates to a filter and a method for manufacturing a filter. The filter comprises a shell construction with a wall construction and a bottom portion, which form at least one section in the shell construction. The filter further comprises at least one resonator within a section of the shell construction. At least the bottom portion of the shell construction and one or more resonators, or at least the part thereof close to the bottom portion of the shell construction, are an integral unit extruded from the same basic block in one piece.

Abstract: In the present invention, a tuning circuit which includes a controllable switch based on a diode (D1), for example, and which is connected in parallel with a resonator, is located between the low impedance end of a center conductor (11) of a quarter wavelength resonator and ground, whereupon resonant frequency tuning is based mainly on a change in the inductance of the resonator. Voltages and power affecting a tuning circuit realized according to this invention are essentially smaller than in a circuit in which the capacitive load of a resonator is tuned by means of a similar tuning circuit located at the high impedance end of the resonator.

Abstract: The invention relates to a filter, a method for manufacturing a filter, a resonator construction, and a method for manufacturing a resonator construction. The filter comprises a shell construction and a plurality of resonators mounted in the shell construction for forming a multi-circuit filter. The filter comprises a connecting portion which combines the resonators and is integral with the resonators.

Abstract: A connection arrangement, in particular an intermodulation-protected coaxial connection arrangement comprising a cable (1) and a cable connection means (2, 11), such as a coaxial connector (2), a lead-in unit (11) or the like, fixed to the cable. The connection arrangement comprises a conductive thick-walled connection piece (3) having an aperture (3a) forming a passage for the cable through the connection piece to the cable connection means (2, 11). The connection arrangement further comprises a crimp connection (5) or the like between the connection piece and the cable connection means, said crimp connection forming between the connection piece (3) and the cable connection means (2, 11) a first closed-circle sealing surface (5) around the aperture (3a) comprised by the connection piece (3).

Abstract: A filter has a shell construction including a connection surface and a bar-like resonator in the shell construction. The bar-like resonator has an initial section having one end region thereof connected to the connection surface of the shell construction and an opposite end region. A substantially straight and elogate intermediate section extends from the opposite end region of the initial section to an end and a turning-point section extends from the end of the intermediate section to an end. A substantially straight and elongate end section has one end connected to the end of the turning-point section so as to extend adjacent to the intermediate section and supporting means connect to the connection surface of the shell construction for supporting the bar-like reasonator at least at one of the end section and turning-point.

Abstract: In a shell construction for a filter in a radio equipment having a body, the shell construction has at least one section which is a fixed part of the body, and is integral with the body.

Abstract: The invention relates to a lumped-constant resonator construction, and a method for adjusting a lumped-constant resonator construction. The lumped-constant resonator construction comprises at least one, preferably ceramic substrate (4), at least one capacitance means (5), and at least one inductance means (6). The capacitance means and the inductance means (6) are clearly locatable separately but operatively connected. The inductance means (6) comprises a conductive coating (11). In the lumped-constant resonator construction according to the invention, the inductance means (6) which comprises the conductive coating (11) and which is locatable separately from the capacitance means (5) is provided on a preferably bar-like ceramic body (7) mounted on the substrate (4).

Abstract: The invention relates to a stripline resonator structure comprising a substrate (2) and one or more stripline patterns (3 to 7) formed on the substrate as a conductive coating. The stripline patterns (3 to 7) are formed as the conductive coating of projections protruding from the actual substrate material and being made of the substrate material.

Abstract: A coaxial resonator of modular construction, wherein the resonator is formed from two or more blocks, or modules, that are fastened to each other. Conductively plated surfaces of the modules may form the center conductor and at least part of the shield of the resonator. A dielectric layer is formed at least partially from the module material, typically ceramic. The module blocks are advantageously made by being cut from ceramic substrate. A resonator, or filter including at least one resonator, can be manufactured without special tools, and may be fabricated by manually assembling modules or by using automatic assembly methods, such as by known printed circuit board assembly techniques.

Abstract: The invention relates to a connection arrangement, in particular an intermodulation-protected coaxial radio-frequency connection arrangement. The arrangement comprises interconnected connector parts (1, 101), wherein each connector part (1, 101) comprises a body (2, 102) and an outer contact member (3, 103) coupled to the body and each connector part (1, 101) further comprises an inner contact member (4, 104), the outer contact members (3, 103) of the connector parts being interconnected and the inner contact members (4, 104) of the connector parts being interconnected. In the connection arrangement, one connector part (101) is attached to an abutment surface (200) provided with a through hole (201) and the other connector part (1) is coupled to the connector part (101) attached to the abutment surface (200).

Abstract: The invention relates to a resonator shell construction, comprising at least two metallic shell modules (41-44) connected to each other to form a modular shell construction, each module enclosing at least one resonator cavity (42-52). The modules comprise wall portions (41a-41c, 42a-42c, 43a-43c, 44a-44c) projecting from the modules, said wall portions being connected to one or more modules, whereby one or more new resonator cavities (61-68) are formed between the modules.