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| Number | Title | Issue Date |
| 7463121 | Temperature compensating tunable cavity filter A high Q cavity resonator loaded with a metallic post and a ceramic disc, the resonator comprising an inner conductive post having a length less than a quarter wavelength. The resonance frequency of the resonator is tunable by changing a distance between a) an outer... | 12/09/2008 |
| 7352264 | Electronically tunable dielectric resonator circuits In order to permit electronic tuning of the frequency of a circuit including dielectric resonators, such as a dielectric resonator filter, tuning plates are employed adjacent the individual dielectric resonators. The tuning plates comprises two separate conductive p... | 04/01/2008 |
| 7352263 | Method and mechanism for tuning dielectric resonator circuits The invention comprises a technique and associated mechanisms by which dielectric resonator circuits, such as filters, can be tuned in both frequency, bandwidth or both without the need for irises, tuning screws and/or tuning plates. In accordance with the invention... | 04/01/2008 |
| 7327210 | Band agile filter A microwave filter and method for remotely tuning a microwave filter from one sub-band to another sub-band using metallic rings to adjust the capacitance or inductance of the resonator. In adjusting the capacitance, a plurality of metallic rings are disposed in the ... | 02/05/2008 |
| 7310031 | Dielectric resonators and circuits made therefrom A dielectric resonator having variable cross-section, preferably varying monotonically, and, most preferably, the resonator being in the shape of a truncated cone. Such shapes displace the H11 mode from the TE mode in the longitudinal direction of the con... | 12/18/2007 |
| 7268634 | Dual-mode voltage controlled oscillator using integrated variable inductors A novel form of an integrated variable inductor uses an on-chip transformer together with a variable capacitor. The variable capacitor can either be a varactor or a switched capacitor array and is connected to the secondary coil of the transformer. By changing the c... | 09/11/2007 |
| 7236069 | Adjustable resonator filter An adjustable resonator filter (200), the operating band of which can be shifted by a one-time adjustment. The natural frequency of each resonator (210, 220) is affected, in addition to the basic tuning arrangement, by an adjustment circuit (ACI), whic... | 06/26/2007 |
| 7224248 | Ceramic loaded temperature compensating tunable cavity filter A high Q RF cavity resonator loaded with a ceramic disc, the resonator comprising an inner conductive post having a length less than a quarter wavelength. The resonance frequency of the resonator is tunable by changing a distance between a) an outer plate and b) a c... | 05/29/2007 |
| 7183881 | Cross-coupled dielectric resonator circuit A cross-coupled dielectric resonator circuit. Resonator circuits in accordance with the invention may be used to build low-loss compact filters, oscillators, and other circuits, particularly microwave circuits. The resonators are arranged relatively to each other wi... | 02/27/2007 |
| 7088203 | Slotted dielectric resonators and circuits with slotted dielectric resonators In accordance with the principles of the present invention, a resonator puck is provided with one or more vertical and/or horizontal, radial slits that improve the quality factor, Q, of circuits constructed from the resonators. Preferably, the slits are very narrow ... | 08/08/2006 |
| 6922120 | Dielectric filter, duplexer dielectric filter, and method for manufacturing the same A method of manufacturing a dielectric filter comprises the steps of: forming a dielectric block; depositing a conductor on the side surfaces and the second surface of the dielectric block, and forming a plurality of resonators, forming input and output terminals on... | 07/26/2005 |
| 6801104 | Electronically tunable combline filters tuned by tunable dielectric capacitors A voltage-controlled tunable filter includes at least two cavity resonators electrically coupled to each other. A voltage tunable dielectric capacitor is positioned within each of the resonators. Connections are provided for applying a control voltage to the voltage... | 10/05/2004 |
| 6636132 | Dielectric filter A dielectric filter stopping a frequency signal at a lower frequency band than a pass band as a reference band with a higher attenuation ratio to perform adjustment of the attenuation ratio even the lower frequency area. The dielectric filter comprises a ... | 10/21/2003 |
| 6617945 | Filter with an electrically tunable resonator A filter or multicoupler has at least one resonator which can be electronically tuned by a tuning device, has at least one tuning element such as a tuning capacitor, a switching element for selectively connecting the tuning element electronically to the r... | 09/09/2003 |
| 6518858 | Resonator, filter, duplexer, and communication apparatus A resonator includes a conductive casing provided with a threaded screw hole, a screw at least partially inserted into the casing, and a fixing member fixing the screw and having a threaded screw hole. In the resonator, the linear expansivity of the casin... | 02/11/2003 |
| 6466111 | Coupler for resonant cavity A coupler for coupling RF electromagnetic energy into or out of a resonant cavity of the type which includes a control post.... | 10/15/2002 |
| 6362707 | Easily tunable dielectrically loaded resonators A multi-resonator filter, including a housing, at least one resonating element, at least one high dielectric constant element, at least one fine tuning screw located above the at least one resonating element and secured in a housing cover by a locking nut... | 03/26/2002 |
| 6320483 | Multi surface coupled coaxial resonator The invention relates to an air-insulated coaxial resonator, which is particularly suitable for a structural part in duplex filters. The resonator has an inner conductor (301) extended at one end, so that it forms extra capacitance with the cover (303) of... | 11/20/2001 |
| 6215376 | Filter construction and oscillator for frequencies of several gigahertz A radio-frequency filter (400, 500, 600) comprises a base plate (401, 603) and an electrically conductive ground plane in connection with it, a predetermined number of inner conductors (403A-403G, 501, 502, 601) attached substantially perpendicularly to the ba... | 04/10/2001 |
| 6198363 | Filter and tuning element The invention relates to a filter and a frequency tuning element. The filter comprises a shell construction (2a to 2d) of conductive material with at least one section (14 to 16) and in the shell construction (2a to 2d) at least one resonator (17 to 19) o... | 03/06/2001 |
| 6198364 | Resonator filter having a frequency regulating means with at least one turn The invention relates to a resonator filter comprising a housing structure (10), at least one resonator conductor (20) in the housing structure, and a regulating means (30) for regulating the frequency band of the resonator filter. The regulating means (3... | 03/06/2001 |
| 6169464 | Dielectric filter A dielectric filter is disclosed in which an open area without being spread with a conductive material is formed on the rear face of a dielectric block with a conductive material spread thereon, thereby making it possible to improve the filtering characte... | 01/02/2001 |
| 6111482 | Dielectric variable-frequency filter having a variable capacitance connected to a resonator A dielectric resonator 5 is electrically connected to an input terminal 1 through a coupling capacitor C1. A dielectric resonator 6 is electrically connected to an output terminal 2 through a coupling capacitor C3. The dielectric resonators 5 and 6 are el... | 08/29/2000 |
| 6078230 | Characteristic adjusting method for dielectric filter using a grinding tool A method of adjusting characteristics of a dielectric filter having integral electromagnetic shielding, the dielectric filter comprises a dielectric body having an outer surface including first and second end surfaces and side surfaces extending between t... | 06/20/2000 |
| 6034579 | Dielectric filter of the band elimination type A dielectric filter is formed by a plurality of resonator holes which are formed in a single dielectric block in such a manner that they extend in a direction between an open-circuited end surface and a short-circuited end surface of the dielectric block.... | 03/07/2000 |
| 5878333 | Tuner with coaxial resonator trimmer A tuner circuit includes a first IF signal generating a first oscillation signal, a local oscillator circuit outputting a local oscillator signal, a mixing circuit mixing the first IF signal and the oscillation signal to generate a second IF signal, and a... | 03/02/1999 |
| 5828275 | Dielectric filter including an adjusted inner electrode and a coupling electrode being level with an open end of a molded member A dielectric filter is made of a dielectric material and includes a molded member of a pillar shape which has a hole formed from the top surface thereof toward the inside, an inner electrode formed so as to cover the inner circumferential surface of the h... | 10/27/1998 |
| 5815056 | Dielectric resonator having an elongated non-conductive resonator gaps and manufacturing method thereof In a dielectric resonator, through holes are formed between opposing two surfaces of a dielectric block, an outer conductor is provided on an outer peripheral surface of the dielectric block, and a plurality of inner conductors are formed on the inner sur... | 09/29/1998 |
| 5793269 | Stepwise regulated filter having a multiple-step switch A stepwise regulated filter includes a resonator structure and a coupling connected to the resonator structure. The resonating frequency of a transmission line (HX1) acting as a resonator may be switched between at least three values. The switching is imp... | 08/11/1998 |
| 5621367 | Coaxial resonator comprising slits formed in the inner conductor The invention relates to a coaxial resonator comprising an inner conductor (12) with walls defining therebetween a free space (24), and a housing portion (13) surrounding the inner conductor (12) and forming an outer conductor of the resonator. In order t... | 04/15/1997 |
| 5510756 | Strip transmission line having a tunable electric length A strip transmission line for guiding a wave therein, including a strip-shaped inner conductor; an outer conductor surrounding the inner conductor with a clearance; a ferrite coating carried on at least one of the conductors; and at least one throughgoing... | 04/23/1996 |
| 5495215 | Coaxial resonator filter with variable reactance circuitry for adjusting bandwidth A filter (102) with an adjustable bandwidth. The filter (102) has a predetermined passband and stopband, and an input (104), an output (106) and at least two resonator structures (116, 124), and a variable reactance element (108) for adjusting the bandwid... | 02/27/1996 |
| 5475350 | Frequency tunable resonator including a varactor A coupled capacitor substrate having thereon a plane capacitor which is integrally bonded on a dielectric resonator and a varactor which is mounted on the coupled capacitor substrate so as to couple the dielectric resonator via the plane capacitor.... | 12/12/1995 |
| 5420554 | Method and apparatus for adjusting a resonant frequency of a transmission line resonator assembly A transmission line resonator assembly (100) employs a method and apparatus for adjusting its resonant frequency. The transmission line resonator assembly (100) comprises a resonator portion (101) and an electrically conductive member (102). The resonator... | 05/30/1995 |
| 5304968 | Temperature compensated resonator The present invention relates specifically to the temperature compensation of a resonator in which a rod or a conductor wound in the form of a cylindrical coil serving as an inner conductor is enclosed within a metal cover and in which the open end of the... | 04/19/1994 |
| 5298873 | Adjustable resonator arrangement An adjustable resonator arrangement comprises a main resonator (T1) and a secondary resonator (T2) reactively coupled thereto. The secondary resonator includes a switching element (S), e.g. a varactor, having at least two states. When the switching elemen... | 03/29/1994 |
| 5218330 | Apparatus and method for easily adjusting the resonant frequency of a dielectric TEM resonator A dielectric TEM resonator, whose resonant frequency is adjustable in both directions after being incorporated in a circuit, is disclosed. A first dielectric TEM resonator comprises a metal member disposed near an open end of a resonator body and coupled ... | 06/08/1993 |
| 5208568 | Method for producing dielectric resonator apparatus having metallized mesa A dielectric resonator (400) is formed, according to the invention, from a block of dielectric material having top, bottom, and side surfaces. A protuberance (407) is formed on at least the top surface of the block. Further, a hole (405) is formed through... | 05/04/1993 |
| 5175520 | High frequency coaxial resonator A high-frequency coaxial resonator including a tubular dielectric member having a through hole and provided with inner and outer peripheral surfaces and a pair of end surfaces which axially oppose each other. An inner conductor is formed on the inner peri... | 12/29/1992 |
| 5172085 | Coaxial resonator with distributed tuning capacity A coaxial resonator with a distributed tuning capacity. The resonator includes one outer conductor and one central conductor, both conductors having a symmetry of revolution around a predetermined central axis. The tuning capacitor is fully distributed al... | 12/15/1992 |
