WO2005048395A3 - A dielectric filter for filtering out unwanted higher order frequency harmonics and improving skirt response - Google Patents

A dielectric filter for filtering out unwanted higher order frequency harmonics and improving skirt response Download PDF

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Publication number
WO2005048395A3
WO2005048395A3 PCT/US2004/034376 US2004034376W WO2005048395A3 WO 2005048395 A3 WO2005048395 A3 WO 2005048395A3 US 2004034376 W US2004034376 W US 2004034376W WO 2005048395 A3 WO2005048395 A3 WO 2005048395A3
Authority
WO
WIPO (PCT)
Prior art keywords
filter
resonators
higher order
frequency harmonics
resonates
Prior art date
Application number
PCT/US2004/034376
Other languages
French (fr)
Other versions
WO2005048395A2 (en
Inventor
Sei-Joo Jang
Original Assignee
Sei-Joo Jang
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
Priority claimed from KR1020030074714A external-priority patent/KR100557305B1/en
Priority claimed from US10/838,699 external-priority patent/US20050264378A1/en
Application filed by Sei-Joo Jang filed Critical Sei-Joo Jang
Publication of WO2005048395A2 publication Critical patent/WO2005048395A2/en
Publication of WO2005048395A3 publication Critical patent/WO2005048395A3/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/201—Filters for transverse electromagnetic waves
    • H01P1/205—Comb or interdigital filters; Cascaded coaxial cavities
    • H01P1/2056—Comb filters or interdigital filters with metallised resonator holes in a dielectric block
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/213—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies
    • H01P1/2136—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies using comb or interdigital filters; using cascaded coaxial cavities

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

The present invention is a filter and a method of making a filter to remove unwanted frequency harmonics associated with current filters. The filter is made up of resonators, such that the filter resonates a design frequency. Whereby, at least two resonators are coupled together between an input and an output and at least one of the resonators is of a different design from other resonators, such that the resonator of a different design resonates the same design frequency as the other resonators and resonates different higher order harmonic frequencies than the other resonators. The present invention also provides methods of improving skirt response for a filter, as well as other response properties of the filter. One way to improve the filter's properties is where at least one of the resonators in a filter is reversed in orientation as compared to the other resonators. Another way is where at least one of the resonators is reversed in orientation electronically by employing electrode coupling on a top and bottom surface of the filter.
PCT/US2004/034376 2003-10-24 2004-10-18 A dielectric filter for filtering out unwanted higher order frequency harmonics and improving skirt response WO2005048395A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR1020030074714A KR100557305B1 (en) 2003-10-24 2003-10-24 A microstrip dielectric filter
KR10-2003-0074714 2003-10-24
US10/838,699 2004-05-04
US10/838,699 US20050264378A1 (en) 2000-10-26 2004-05-04 Dielectric filter for filtering out unwanted higher order frequency harmonics and improving skirt response

Publications (2)

Publication Number Publication Date
WO2005048395A2 WO2005048395A2 (en) 2005-05-26
WO2005048395A3 true WO2005048395A3 (en) 2006-02-16

Family

ID=34594055

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2004/034376 WO2005048395A2 (en) 2003-10-24 2004-10-18 A dielectric filter for filtering out unwanted higher order frequency harmonics and improving skirt response

Country Status (1)

Country Link
WO (1) WO2005048395A2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030090342A1 (en) * 2001-11-14 2003-05-15 Radio Frequency Systems, Inc., Radio Fre Triple-mode mono-block filter assembly

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030090342A1 (en) * 2001-11-14 2003-05-15 Radio Frequency Systems, Inc., Radio Fre Triple-mode mono-block filter assembly

Also Published As

Publication number Publication date
WO2005048395A2 (en) 2005-05-26

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