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WO2006019302A1 - Elements de resonance accordables dielectriques - Google Patents

Elements de resonance accordables dielectriques Download PDF

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Publication number
WO2006019302A1
WO2006019302A1 PCT/NO2004/000113 NO2004000113W WO2006019302A1 WO 2006019302 A1 WO2006019302 A1 WO 2006019302A1 NO 2004000113 W NO2004000113 W NO 2004000113W WO 2006019302 A1 WO2006019302 A1 WO 2006019302A1
Authority
WO
WIPO (PCT)
Prior art keywords
resonator
frequency
resonance
electrical
electric
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/NO2004/000113
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/NO2004/000113 priority Critical patent/WO2006019302A1/fr
Publication of WO2006019302A1 publication Critical patent/WO2006019302A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/06—Cavity resonators

Definitions

  • the present invention relates di electrical tunable resonance elements, that are used as the frequency setting unit and as filters in radio communication systems .
  • the second group is where cavity filters are used as a notch filter, i.e. a transmit frequency passes the filter unaffected and maximum attenuation are applied to close frequencies to avoid that the noise level from the transmitter affects the receiving conditions on this frequency.
  • a receiver frequency shall filter a close transmitting frequency.
  • the existing cavity filters have a number of disadvantages. They are exposed to corrosion, as , oxidation of conducting through puts changes the characteristics of the cavity filter. Regular tuning of the filters will be required and there will be significant maintenance .cost for the end user.
  • the corrosion process does not only cause instability in the filter, but also degrades performance.
  • the filter will loose its function with time, and will degrade the performance of the system configuration where the filters are included.
  • a common resonator is a 1 A or 1 A wave Coax resonator.
  • the resonance frequency is fixed from the supplier and can only be changed by mechanically remove parts of the metal surface covering the ends of the resonator. This change can only be done once, and is critical as the resonator is of no use if the tuning fails.
  • the invention presents a new principle for design of di electrical tuneable resonance elements.
  • the new design is based on changing the amount of di electric material between fixed mounted conducting surfaces or a resonance structure. This can be done by changing the design and construction of di electrical resonance elements as defined in the appended patent claim 1.
  • Several embodiments of the invention are possible, as covered in the appended patent claims 2-8.
  • Fig. 1 shows the main principle for the invention, where di electric material is turned maximum 180 degrees between the conducting surfaces with an eccentric tuning, that applies both to tuning of frequency and coupling factor
  • Fig.2 shows a different way of tuning based on the principle, using a centric tuning of the di electric material.
  • Tuning of the coupling factor is done by turning the eccentric di electric discs (2 and 4) up to 180 degrees between the fixed conducting surfaces (21 and 22) by rotating the shaft (7) that is mounted with a mounting device(33) .
  • the shaft (7) must be of a non conducting material with good high frequency parameters .
  • the mounting device (33) for the shaft(7) is not critical for the technical solution.
  • the shaft (7) pulls both di electric discs (2 and 4) in parallel that ensures a balanced tuning of coupling factor to the resonance element.
  • Fig.2 shows a different principle for tuning of the amount of di electric material (19) between the cap(12) and the top of the resonance element (3) .
  • the di electric material consists of two parts (19 and 19a) with different di electric characteristic.
  • the capacitance is tuned by rotating the disc(19) centric up to 180 degrees by turning the shaft (5) .
  • a disc (3a) At the top of the resonance element (3) there is a disc (3a) , that may be shaped as a carved 180 degrees sector with a 360 degrees top or one or more arbitrary shaped sectors .
  • the disc (3) is sliding against the rotating di electric material (19) to minimise friction.
  • Fig.3 shows the invention where the principle of tuning of di electric resonator is described.
  • the di electric resonator(3) is characterised by a specific resonance frequency and a high Q-value.
  • the resonance frequency is adjusted torch the fixed metal surface(12) . More di electric material between the resonator (3) and the metal surface (12) will cause a lower resonance frequency in the resonator. Up to 20% change in frequency may be obtained.
  • the di electric resonator is mounted to a printed circuit board (PCB) (41, 42, 15 and 16) using a distance unit (6) .
  • the PCB consist of coupling lines (15 and 16) that connects the surrounding circuit through the magnetic field to the di electric resonator(3) .
  • (42) is the di electric material of the PCB, (41) is earth layer that is electrical connected to the surrounding cap(12) .
  • Fig. 4 shows the invention where the resonator is a resonance chamber.
  • the figure shows a filter with di electric tuning of resonance frequency by a disc consisting of two halves (19 and 19a) , that have different di electrical constant, mounted to a shaft (5) that is rotated up to 180 degrees.
  • the disc (19 and 19a) is mounted in a slot (8) in the housing(12) where parts of the disc is lowered into the resonance chamber(51) .
  • the amount of di electric material changes the resonance frequency.
  • the probes (15 and 16) connects the resonance chamber to the surrounding electric structure.
  • Fig. 5 shows the invention where the resonator is a coax resonator.
  • the resonator is normally designed either as a M wave or a X A wave unit.
  • the resonator consist of an inner metallic tube(3) with a connector(3a) , a di electric material (51) that between the inner tube (3) and the outer conducting surface (12) .

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  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

L'invention concerne un ensemble résonateur comprenant des résonateurs dans lesquels la fréquence de résonateur est accordée de façon qu'une quantité variable de matériau diélectrique modifie la fréquence de résonance. Ceci est obtenu par modification de la capacité entre l'élément de résonance et la structure métallique qui l'entoure au moyen d'un disque diélectrique tournant jusqu'à 180 degrés autour d'un axe.
PCT/NO2004/000113 2004-04-23 2004-04-23 Elements de resonance accordables dielectriques Ceased WO2006019302A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/NO2004/000113 WO2006019302A1 (fr) 2004-04-23 2004-04-23 Elements de resonance accordables dielectriques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/NO2004/000113 WO2006019302A1 (fr) 2004-04-23 2004-04-23 Elements de resonance accordables dielectriques

Publications (1)

Publication Number Publication Date
WO2006019302A1 true WO2006019302A1 (fr) 2006-02-23

Family

ID=35907652

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2004/000113 Ceased WO2006019302A1 (fr) 2004-04-23 2004-04-23 Elements de resonance accordables dielectriques

Country Status (1)

Country Link
WO (1) WO2006019302A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130229243A1 (en) * 2012-03-05 2013-09-05 Filtronic Wireless Limited, Tuneable Filter

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB708833A (en) * 1951-07-30 1954-05-12 Gen Electric Co Ltd Improvements in or relating to high frequency electrical oscillators
JPS57104303A (en) * 1980-12-19 1982-06-29 Fujitsu Ltd Variable frequency oscillator
JPS61136302A (ja) * 1984-12-06 1986-06-24 Murata Mfg Co Ltd 誘電体共振器
US4613838A (en) * 1984-08-31 1986-09-23 Murata Manufacturing Co., Ltd. Dielectric resonator
WO2004084340A1 (fr) * 2003-03-18 2004-09-30 Filtronic Comtek Oy Filtre de resonateur

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB708833A (en) * 1951-07-30 1954-05-12 Gen Electric Co Ltd Improvements in or relating to high frequency electrical oscillators
JPS57104303A (en) * 1980-12-19 1982-06-29 Fujitsu Ltd Variable frequency oscillator
US4613838A (en) * 1984-08-31 1986-09-23 Murata Manufacturing Co., Ltd. Dielectric resonator
JPS61136302A (ja) * 1984-12-06 1986-06-24 Murata Mfg Co Ltd 誘電体共振器
WO2004084340A1 (fr) * 2003-03-18 2004-09-30 Filtronic Comtek Oy Filtre de resonateur

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 194 2 October 1982 (1982-10-02) *
PATENT ABSTRACTS OF JAPAN vol. 010, no. 332 12 November 1986 (1986-11-12) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130229243A1 (en) * 2012-03-05 2013-09-05 Filtronic Wireless Limited, Tuneable Filter
US9490512B2 (en) * 2012-03-05 2016-11-08 Filtronic Wireless Limited Tuneable filter
GB2500112B (en) * 2012-03-05 2019-07-03 Filtronic Wireless Ltd A tuneable filter

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