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Class Information
Number: 333/207
Name: Wave transmission lines and networks > Coupling networks > Wave filters including long line elements > Coaxial > Tunable
Description: Subject matter wherein the filter structure includes electrically or mechanically variable parameters to provide an adjustable amplitude versus frequency characteristic.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7612637 |
Built-in cross-coupled dielectric filter |
Nov. 3, 2009 |
| 7463121 |
Temperature compensating tunable cavity filter |
Dec. 9, 2008 |
| 7449981 |
Variable radio frequency band filter |
Nov. 11, 2008 |
| 7439828 |
Tunable filter, duplexer and communication apparatus |
Oct. 21, 2008 |
| 7405637 |
Miniature tunable filter having an electrostatically adjustable membrane |
Jul. 29, 2008 |
| 7388458 |
DC extracting arrangement and a filter |
Jun. 17, 2008 |
| 7348869 |
Adjustable coaxial filter device with axially adjustable inner conductor |
Mar. 25, 2008 |
| 7236069 |
Adjustable resonator filter |
Jun. 26, 2007 |
| 7180391 |
Resonator filter |
Feb. 20, 2007 |
| 7075388 |
Ceramic RF triplexer |
Jul. 11, 2006 |
| 7068128 |
Compact combline resonator and filter |
Jun. 27, 2006 |
| 6995636 |
In-band-flat-group-delay type dielectric filter and linearized amplifier using the same |
Feb. 7, 2006 |
| 6977565 |
Dielectric filter |
Dec. 20, 2005 |
| 6970058 |
L-C type filter module and helical filter made up of at least two such modules |
Nov. 29, 2005 |
| 6936559 |
Tunable devices incorporating cacu3ti4o12 |
Aug. 30, 2005 |
| 6922120 |
Dielectric filter, duplexer dielectric filter, and method for manufacturing the same |
Jul. 26, 2005 |
| 6903633 |
Electronic tunable filters with dielectric varactors |
Jun. 7, 2005 |
| 6895190 |
Switchable bandwidth lowpass filter |
May. 17, 2005 |
| 6885261 |
Dielectric filter, antenna sharing device, and communication device having a voltage controlled reactance element for tuning the center frequency |
Apr. 26, 2005 |
| 6879222 |
Reduced length metallized ceramic duplexer |
Apr. 12, 2005 |
| 6873225 |
Diplexers with low pass filter having distributed and non-distributed (lumped) elements |
Mar. 29, 2005 |
| 6861929 |
Low-pass filter |
Mar. 1, 2005 |
| 6836198 |
Adjustable capacitive coupling structure |
Dec. 28, 2004 |
| 6809612 |
Dielectric block signal filters with cost-effective conductive coatings |
Oct. 26, 2004 |
| 6801104 |
Electronically tunable combline filters tuned by tunable dielectric capacitors |
Oct. 5, 2004 |
| 6765457 |
Dielectric filter, dielectric duplexer, and communication device having elongated through holes |
Jul. 20, 2004 |
| 6750730 |
Tuning arrangement for a microwave device |
Jun. 15, 2004 |
| 6750733 |
Coupled resonator filter tuning having inter-resonator interaction compensation |
Jun. 15, 2004 |
| 6734765 |
Dielectric filter, dielectric duplexer, and communications equipment |
May. 11, 2004 |
| 6731186 |
Composite dielectric filter device and communication apparatus incorporating the same |
May. 4, 2004 |
| 6694601 |
Method of adjusting characteristics of dielectric filter |
Feb. 24, 2004 |
| 6686817 |
Electronic tunable filters with dielectric varactors |
Feb. 3, 2004 |
| 6636132 |
Dielectric filter |
Oct. 21, 2003 |
| 6590475 |
Filter, antenna duplexer, and communication apparatus incorporating the same |
Jul. 8, 2003 |
| 6570467 |
Cost effective dual-mode shiftable dielectric RF filter and duplexer |
May. 27, 2003 |
| 6545565 |
Filter, antenna sharing device, and communication device |
Apr. 8, 2003 |
| 6538533 |
Dielectric resonator filter |
Mar. 25, 2003 |
| 6522220 |
Frequency variable filter, antenna duplexer, and communication apparatus incorporating the same |
Feb. 18, 2003 |
| 6522224 |
Method for adjusting characteristics of a dielectric filter |
Feb. 18, 2003 |
| 6518858 |
Resonator, filter, duplexer, and communication apparatus |
Feb. 11, 2003 |
| 6515559 |
In-band-flat-group-delay type dielectric filter and linearized amplifier using the same |
Feb. 4, 2003 |
| 6507251 |
Dual-mode band-pass filter |
Jan. 14, 2003 |
| 6504446 |
Method for adjusting characteristics of dielectric filter, method for adjusting characteristics of dielectric duplexer, and devices for practicing the methods |
Jan. 7, 2003 |
| 6501348 |
Method for adjusting the filter characteristic of a microwave ceramic filter |
Dec. 31, 2002 |
| 6466109 |
Dielectric filter having non-conductive adjusting regions |
Oct. 15, 2002 |
| 6407651 |
Temperature compensated tunable resonant cavity |
Jun. 18, 2002 |
| 6404307 |
Resonant cavity coupling mechanism |
Jun. 11, 2002 |
| 6400239 |
Microwave filter with a movable shield having alignment windows |
Jun. 4, 2002 |
| 6362707 |
Easily tunable dielectrically loaded resonators |
Mar. 26, 2002 |
| 6359533 |
Combline filter and method of use thereof |
Mar. 19, 2002 |
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