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Class 333/224 - Having movable element


Subclass of Class 333 - Wave transmission lines and networks
Definition: Subject matter wherein the frequency is adjusted by a movable
No. of patents: 48
Last issue date: 07/19/2011


1    
NumberTitleIssue Date
7982561Resonator system for an RF power amplifier output circuit
A resonator system is presented that has first and second cavity resonators for use in an RF amplifying system employing an RF amplifier device having an output circuit and an RF signal broadcasting antenna coupled to the output circuit. The resonators are interpose...
07/19/2011
7351120Adjustable impedance electrical connector
Disclosed is an adjustable electrical connector. The connector includes a moveable structure including a plurality of return signal conductors disposed on a moveable block, and a fixed structure including a plurality of signal conductors. Each signal return conducto...
04/01/2008
7271687Dielectric resonator having a non-uniform effective dielectric permittivity along an axis of tuner displacement
The present invention relates to an improved tuning arrangement to linearise the sensitivity to frequency changes within a certain frequency range in response to tuner displacements relative to a resonator body. The tuning arrangement comprises a tuner and/or resona...
09/18/2007
7227434Tuning screw assembly
The present invention relates to a tuning screw assembly comprising a sleeve (100) with internal threads for engaging a tuning screw (200) having external threads. The sleeve comprises a first threaded portion (32) which is axially displaced in ...
06/05/2007
7224248Ceramic 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
7205868Variable 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 resonat...
04/17/2007
7202668Microstrip coil design for MRI apparatus
A microstrip-based RF coil for use in an MRI apparatus constructed to perform human head imaging is provided and includes (a) a cylindrical non-magnetic core module having an outer surface and a longitudinal axis, a cylindrical bore extending through the core module...
04/10/2007
7107034High frequency and low noise interconnect system
Methods and apparatus are provided for an interconnect system for coupling radio frequency signals from one component to another in a RF system. The interconnect system acts as a coaxial connection. The apparatus comprises an interconnect, a dielectric sleeve, and a...
09/12/2006
7095300Band eliminate filter and communication apparatus
A coaxial capacitor is inserted in a coaxial cable in a predetermined position. A housing is provided as a ground conductor path in order to establish conduction between two external conductors in portions of the coaxial cable which are separated by the inserted coa...
08/22/2006
7078990RF cavity resonator with low passive inter-modulation tuning element
A tunable RF cavity resonator having reduced generation of passive inter-modulation, the tunable RF cavity resonator including a cavity body, a fixed tuning post at a first end of the cavity body, a dielectric rod in the fixed tuning post interior space with a first...
07/18/2006
7034266Tunable microwave apparatus
Disclosed is a method and apparatus for tuning a microwave apparatus. The chamber volume of the microwave apparatus can be changed by moving a flexible portion of a flexible wall while a perimeter portion of the flexible wall remains fixed. ...
04/25/2006
6970058L-C type filter module and helical filter made up of at least two such modules
An L-C type filter module comprising at least two capacitors and at least one inductor. Each of the capacitors consists of a first elongated element made of conductive material partially fitted in a hole made in a second element made of conductive material, connecte...
11/29/2005
6937110Variable cut off attenuator for rectangular wave-guides
The attenuator includes two variable-section components (13, 15) for the passage, in conditions of perfect adaptation, from a first wave-guide in the P band to a second wave-guide in the X band and vice versa. An air-filled zone (5V), the length of which can ...
08/30/2005
6452466Fastener means relating to contact junctions
The present invention relates to a fastener means for securing a center conductor (23) in a cavity filter and for enabling the center conductor to be secured mechanically in a stable fashion and with good electric contact between itself and the bottom 22 ...
09/17/2002
6407651Temperature compensated tunable resonant cavity
A tunable resonant cavity including a cavity housing having top and bottom walls with a post disposed in said cavity extending from die bottom of the cavity toward and spaced from the top. The length of the post is adjustable to adjust the resonant freque...
06/18/2002
6384699Tuning arrangement for a cavity filter
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 ...
05/07/2002
6337611Sleeve in a radio frequency filter
In a sleeve in a radio frequency filter at least one portion having a lateral dimension being smaller than the diameter of a screw to be threaded through the sleeve is provided. The portion is flexible in a radial direction, so that a screw threaded throu...
01/08/2002
6133810Enhanced coaxial cavity filter configured to be tunable while shorted
An enhanced tunable coaxial cavity filter that may be tuned while it is shorted. The coaxial cavity filter may have one or more cavities. One or more of the cavities may include a switch for shorting the cavity. When a plurality of cavities are implemente...
10/17/2000
6118356Microwave cavity having a removable end wall
A plurality of end caps engagable with a microwave cavity each have an underside configured differently to cause the microwave cavity to have different electrical responses depending on which end cap engages the microwave cavity. A microwave device includ...
09/12/2000
6057748Methods of tuning and temperature compensating a variable topography electromagnetic wave device
An electromagnetic wave component uses one or more diaphragms secured to the interior of a waveguide structure to tune its resonant frequency, with each diaphragm engaged by one or more adjustment members that deform it. The adjustment members are prefera...
05/02/2000
5691675Resonator with external conductor as resonance inductance element and multiple resonator filter
A resonator consists of an external conductor (1), a dielectric plate (2), a resonance capacity element, an input terminal (5), and an output terminal (6). The dielectric plate (2) is fixed at its upper and lower ends to the upper and lower walls, respect...
11/25/1997
5686874Temperature-compensated combiner
A temperature-compensated combiner including a control rod disposed in a combiner housing for controlling a middle frequency; a resonator tube secured to the housing and coaxially disposed around the control rod; a regulating cup arranged at an end of the...
11/11/1997
5666093Mechanically tunable ceramic bandpass filter having moveable tabs
A mechanically tunable ceramic bandpass filter incorporates at least one resonator, the resonator including a resonator body, a coupling capacitor electrically connected to the resonator body, and an electrode pin electrically connected to the coupling ca...
09/09/1997
5621367Coaxial 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
5550519Dielectric resonator having a frequency tuning element extending into the resonator hole
The invention relates to a dielectric resonator comprising a block (2) of dielectric material, having upper (9), lower and side surfaces and in which there is a hole (3a) extending from the upper surface to the lower surface. The hole (3a) and the lower s...
08/27/1996
5285178Combiner resonator having an I-beam shaped element disposed within its cavity
In a combiner filter for a cellular telephone system, there is a coaxial resonator which includes a rectangular cavity. Within the rectangular cavity, there is a central conductor having an oval shaped plate. The central conductor and oval shaped plate ar...
02/08/1994
5218330Apparatus 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
5028896Stripline circuit
The invention relates to a stripline circuit comprising at least one stripline pattern (2 to 6) made of a material of high electrical conductivity on the surface of a printed board (1) made of a dielectric material, a metallic or metal coated cover (8 to ...
07/02/1991
4912437Stripline circuit and method for regulating the characteristics thereof
The invention relates to a stripline circuit comprising a stripline structure of a high-conductive material disposed on the surface of a board of a dielectric material, as well as a method for regulating such a stripline circuit. The invention is characte...
03/27/1990
4775847Tunable resonant cavity filter structure with enhanced ground return
A tunable resonant cavity filter structure is disclosed which includes an enhanced ground return internal to the cavity which effectively eliminates generation of deterioration wide band noise and optimizes unloaded Q as well as rending resonant frequency...
10/04/1988
4730174Dielectric material coaxial resonator with improved resonance frequency adjusting mechanism
The disclosure is directed to a dielectric material coaxial resonator provided with an improved resonance frequency adjusting mechanism which is arranged to eliminate deviations of the resonance frequency after adjustment for adjusting the resonance frequ...
03/08/1988
4724403Microwave oscillator
A microwave oscillator of the type in which a dielectric resonator is disposed inside a conductive housing, characterized in that a conductive rod-like member is disposed inside the housing and arranged in parallel with the axis of the dielectric resonato...
02/09/1988
4719435Resonant microstrip-line circuit
The invention relates to a device for the fine adjustment of a resonant microstrip-line formed on an insulating substrate (2), tuned by a varicap diode (7,8) which makes it possible to adjust the shape of the curve representing the tuning frequency of the...
01/12/1988
4667172Ceramic transmitter combiner with variable electrical length tuning stub and coupling loop interface
Transmitter combining apparatus includes up to five RF filters (100) coupled to a microstrip combiner (300) for combining up to five input signals for application to a common antenna. The RF filter (100) includes a ceramic resonator (116) sandwiched betwe...
05/19/1987
4631506Frequency-adjustable coaxial dielectric resonator and filter using the same
A coaxial dielectric resonator for VHF and/or UHF band comprising a generally cylindrical dielectric having inner surface and outer surface. The inner and outer surfaces of the dielectric are respectively covered by outer and inner conductors and these co...
12/23/1986
4583064Strip-line resonator
A strip-line resonator comprises a first dielectric substrate having a conductive film on one surface thereof for connection to ground and a strip line on the other surface thereof and a second dielectric substrate having one surface thereof making contac...
04/15/1986
4521754Tuning and temperature compensation arrangement for microwave resonators
The microwave resonator includes an enclosed resonator housing and a hollow central conductor having one end fastened to a bottom of the resonator housing and extending toward a top wall of the resonator housing. The other end of the central conductors is...
06/04/1985
4488086Method for the manufacture of a device ensuring an electrical and thermal contact between a plurality of metal surfaces, device obtained by this method, and use of said device
The method according to the invention comprises winding a metal wire substantially helically both round a fitting constituted by a flexible strip and around two rods arranged parallel to the fitting axis and on either side of the fitting. The rods are eli...
12/11/1984
4477786Semi-coaxial cavity resonator filter
A semi-coaxial cavity resonator filter including a plurality of semi-axial cavity resonators, as constructed units, each of which has an adjustable device in which dielectric substrates having a specific dielectric constant of more than 1 are disposed in ...
10/16/1984
4451806Tuning means for a transmisson line cavity
A transmission line cavity comprises an outer conductor and a center conductor. The cavity is in combination with a source, such as a power tube, for establishing electromagnetic waves within the cavity. The impedance of the center conductor may be change...
05/29/1984
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