WO2006019301A1 - Condensateurs accordables - Google Patents

Condensateurs accordables Download PDF

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Publication number
WO2006019301A1
WO2006019301A1 PCT/NO2004/000112 NO2004000112W WO2006019301A1 WO 2006019301 A1 WO2006019301 A1 WO 2006019301A1 NO 2004000112 W NO2004000112 W NO 2004000112W WO 2006019301 A1 WO2006019301 A1 WO 2006019301A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrical
capacitor
capacitors
tuning
tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/NO2004/000112
Other languages
English (en)
Inventor
Leif Hjalmar Hansen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NOISELESS COMMUNICATION AS
Original Assignee
NOISELESS COMMUNICATION AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NOISELESS COMMUNICATION AS filed Critical NOISELESS COMMUNICATION AS
Priority to PCT/NO2004/000112 priority Critical patent/WO2006019301A1/fr
Publication of WO2006019301A1 publication Critical patent/WO2006019301A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G5/00—Capacitors in which the capacitance is varied by mechanical means, e.g. by turning a shaft; Processes of their manufacture
    • H01G5/01—Details
    • H01G5/014—Housing; Encapsulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G5/00—Capacitors in which the capacitance is varied by mechanical means, e.g. by turning a shaft; Processes of their manufacture
    • H01G5/01—Details
    • H01G5/013—Dielectrics
    • H01G5/0134—Solid dielectrics
    • H01G5/0138—Solid dielectrics with movable dielectrics

Definitions

  • the applied invention concerns tunable capacitors used in almost all types of electronic equipment requiring tuning of capacity for a given purpose.
  • Tunable capacitors are used in almost all electronic equipment that requires tuning of capacity in order to tune frequency or coupling factors.
  • Existing capacitors are based on the same principle design as the first tunable capacitors that were taken into use for approximately 100 years ago.
  • the first tunable capacitors were used in short wave band, i.e. low frequencies typical less than 30MHz and had large physical dimensions.
  • Plate capacitors consist of two or more plate elements whereby the plates slide between each other through a rotating movement of one of the set of plates with the other set of plates remaining fixed.
  • the dielectric material may be air or some other dielectric material that has a good high frequency response.
  • a sliding contact connects the rotating section of elements to the electric circuit. When this is rotated sufficient amount of times, it is worn and exposed to oxidation, which results in instable contacts. The component become defective and requires replacement. To compensate for this gold connectors are often used, but the gold layer is often thin and is worn out by the repeated turns of the connectors.
  • Tube capacitors are constructed such that a moving metal cylinder is inserted into a fixed metal cylinder.
  • the di electrical material is either air or some other di electric material that has the same functionality as for plate capacitors. Tube capacitors have the same weaknesses as the plate capacitor described above.
  • the purpose of the present invention is to eliminate the above described problem areas for existing variable capacitors .
  • the invention consists of changes in the principle for construction of tunable capacitors . This is achieved by changing the construction of tunable capacitors as defined in the appended patent claim 1. several embodiments of the invention are possible, as covered in the appended patent claims 2-4. Brief description of the drawings
  • Fig 1 shows the main principle of the invention, where the di electric material is inserted/moved between the conducting surfaces .
  • Fig 2 shows a tunable capacitor where a complete or half a disc is turned between the conducting surfaces. In the case of a complete disc, each half will have different di electrical constant.
  • Fig 3 shows a di electrical disc that is divided in two halves each with different di electrical constant.
  • Fig 4 shows a di electrical disc seen from a sideview.
  • Fig 5 shows the principle for a tunable tube capacitor.
  • Fig 6 shows a different shape of the principle for tunable tube capacitors.
  • the invention solves the said problem areas as described in the technical background.
  • Fig. 1 shows the main principle of the invention.
  • the capacitor consists of two conducting surfaces (11 and 12) with a given distance, and a di electrical material (7) between the conducting surfaces that have a given di electrical constant.
  • the conducting surfaces (11 and 12) are fixed and the di electrical material (7) is inserted between the conducting surfaces.
  • the amount of di electrical material is changed by- turning the disc eccentric up to 180 degrees around the shaft (6) .
  • the tuning changes the capacitance in the capacitor.
  • the fixing of the shaft must be such that it provides sufficient friction in order to keep the di electrical material in position.
  • Fig. 2 shows a different principle for tuning the amount of di electric material (7 and 7a) between the conducting surfaces (11 and 12) .
  • the conducting surfaces are mounted directly on the PCB or similar using the pins (11a and 12a) to minimise serial inductance and for mounting the component.
  • the pins (11 and 12a) may be replaced with alternative mounting devices that provide low serial inductance.
  • the di electrical material (7 and 7a) has different di electrical constant and the capacitance is tuned by rotating the disc up to 180 degrees using the tuning screw (6) , where the fixing of the shaft must provide sufficient friction to keep the di electrical material in position.
  • Fig. 3 shows a disc divided into two halves with - different di electrical material (7 and 7a) each having different di electrical constant. The disc is rotated up to 180 degrees around the shaft (6) .
  • Fig. 4 shows a sideview of a disc containing two halves of di electrical material (7 and 7a), each having ' different di electrical constant. The disc is rotated up to 180 degrees around the shaft (6) for tuning of the capacitance.
  • Fig. 5 shows the principle for a tunable tube capacitor.
  • the fixed conducting surfaces (11 and 12) form part of a complete cylinder which is mounted ⁇ directly to the PCB obtaining minimal serial inductance.
  • the di electrical material (7 and 7a) is shaped as a tube consisting of two of several areas with different di electrical constant, and placed between the conducting surfaces (11 and 12) and rotated up to 180 degrees using the tuning screw (6) .
  • the di electrical material is rotated using the tuning screw (6) for tuning the capacitance, where the fixing of the shaft must be such that it provides sufficient friction in order to keep the di electrical material in position.
  • Fig. 6 shows another type of tube capacitor.
  • the capacitor consists of a outer metallic tube (11) with inner groves, a inner cylindrical conductor(12) , a tube shaped di electrical material (7) with outer groves, a inner cavity(9) shaped to fit the metallic cylinder(12) and a mounting device (90) consisting of a non-conducting material with good high frequency quality.
  • the cylinders (11 and 12 ) is mounted directly to a surrounding circuit to minimise the serial inductance.
  • the capacitance is changed by rotating the di electric material (7) with multiple turns using the turn slot (6) .
  • the amount of di electrical material (7) between the conducting surfaces (11 and 12) sets the capacitance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)

Abstract

L'invention concerne une ensemble de condensateurs comprenant des condensateurs accordables dans lesquels au moins deux surfaces métalliques fixes de n'importe quelle forme et montées selon n'importe quel procédé, ainsi qu'un ou plusieurs tubes ou disques diélectriques sont insérés entre les surfaces métalliques par un mouvement de rotation.
PCT/NO2004/000112 2004-04-23 2004-04-23 Condensateurs accordables Ceased WO2006019301A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/NO2004/000112 WO2006019301A1 (fr) 2004-04-23 2004-04-23 Condensateurs accordables

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/NO2004/000112 WO2006019301A1 (fr) 2004-04-23 2004-04-23 Condensateurs accordables

Publications (1)

Publication Number Publication Date
WO2006019301A1 true WO2006019301A1 (fr) 2006-02-23

Family

ID=35907651

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2004/000112 Ceased WO2006019301A1 (fr) 2004-04-23 2004-04-23 Condensateurs accordables

Country Status (1)

Country Link
WO (1) WO2006019301A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU480123A1 (ru) * 1972-10-30 1975-08-05 Предприятие П/Я В-8751 Подстроечный конденсатор
US5099386A (en) * 1990-09-20 1992-03-24 General Scanning, Inc. Variable-capacitance position transducing
EP1396703A2 (fr) * 2002-08-27 2004-03-10 Delphi Technologies, Inc. Capteur capacitif de positions angulaires

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU480123A1 (ru) * 1972-10-30 1975-08-05 Предприятие П/Я В-8751 Подстроечный конденсатор
US5099386A (en) * 1990-09-20 1992-03-24 General Scanning, Inc. Variable-capacitance position transducing
EP1396703A2 (fr) * 2002-08-27 2004-03-10 Delphi Technologies, Inc. Capteur capacitif de positions angulaires

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