WO1998023103A1 - Structure de filtre pour dispositif radio - Google Patents

Structure de filtre pour dispositif radio Download PDF

Info

Publication number
WO1998023103A1
WO1998023103A1 PCT/KR1997/000039 KR9700039W WO9823103A1 WO 1998023103 A1 WO1998023103 A1 WO 1998023103A1 KR 9700039 W KR9700039 W KR 9700039W WO 9823103 A1 WO9823103 A1 WO 9823103A1
Authority
WO
WIPO (PCT)
Prior art keywords
inductors
radio device
filter structure
filter
pcb
Prior art date
Application number
PCT/KR1997/000039
Other languages
English (en)
Inventor
Eung-Soon Chang
Original Assignee
Chang Eung Soon
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 Chang Eung Soon filed Critical Chang Eung Soon
Priority to AU21060/97A priority Critical patent/AU2106097A/en
Publication of WO1998023103A1 publication Critical patent/WO1998023103A1/fr

Links

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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/08—Constructional details, e.g. cabinet
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • H05K1/182—Printed circuits structurally associated with non-printed electric components associated with components mounted in the printed circuit board, e.g. insert mounted components [IMC]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
    • H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
    • H05K3/341—Surface mounted components
    • H05K3/3431—Leadless components
    • H05K3/3442—Leadless components having edge contacts, e.g. leadless chip capacitors, chip carriers

Definitions

  • the present invention relates to a filter structure for a radio (wireless) device, and in particular to an improved filter structure for a radio device which is capable of providing a lighter and more compact radio device having a filter which is used for a wireless telephone, a mobile phone, a Code Division Multiple Access (CDMA), a Personal Communication System (PCS), etc., enhancing the performance of filtering, and reducing the fabrication cost of the product.
  • a radio wireless
  • CDMA Code Division Multiple Access
  • PCS Personal Communication System
  • the radio device (the wireless device) includes a transmission section and a receiving section.
  • a filter is used in the transmission and receiving sections for separating frequencies and filtering a desired frequency from the frequencies.
  • the filters there are various type filters for the radio device.
  • a dielectric type filter and a micro-strip line saw type filter are widely used.
  • the construction of the conventional filter is complicated.
  • the conventional filter is made of expensive materials, the fabrication cost is high.
  • a filter structure for a radio device which overcomes the problems encountered in the conventional art. It is another object of the present invention to provide an improved filter structure for a radio device which is capable of providing a lighter and more compact radio device having a filter which is used for a wireless telephone, a mobile phone, a CDMA, a PCS, etc., enhancing the performance of filtering, and reducing the fabrication cost of the product.
  • an improved filter structure for a radio device which is capable of more simplifying the construction of a filter, reducing the fabrication cost, and facilitating a better performance.
  • an improved filter structure for a radio device which includes a plurality of cylindrical high frequency inductors (1) and (2), a plurality of insertion grooves (3) and (4) into which the inductors (1) and (2) are inserted, and a Printed Circuit Board (PCB) (8) having a ground circuit (7) for grounding input/output terminals (5) and (6) and the inductors (1) and (2) when the input/output terminals (5) and (6) and the inductors (1) and (2) are inserted, wherein the inductors (1) and (2) are coupled by an M-coupling method, and a condenser capacity is determined by a distribution capacity (CJ between the PCB 8 and two high frequency inductors (1) and (2).
  • PCB Printed Circuit Board
  • Figure 1 is an exploded perspective view illustrating a filter structure for a radio device according to the present invention.
  • Figure 2 is graph illustrating the effects of the present invention.
  • Figure 1 is an exploded perspective view illustrating a filter structure for a radio device according to the present invention.
  • the filter structure for a radio device includes a plurality of cylindrical high frequency inductors 1 and 2, a plurality of insertion grooves 3 and 4 into which the inductors 1 and 2 are inserted, and a Printed Circuit Board (PCB) 8 having a ground circuit 7 for grounding when input/output terminals 5 and 6 and the inductors 1 and 2 are inserted.
  • PCB Printed Circuit Board
  • the M-coupling method is used for coupling the inductors 1 and 2.
  • the cylindrical inductors 1 and 2 are inserted into the insertion grooves 3 and 4 formed in the PCB 8, and then the brazing process is performed.
  • a desired characteristic of the filter is determined by adjusting the distance between two inductors 1 and 2.
  • the inductors 1 and 2 are commonly grounded by the ground circuit 7 formed below the inductors 1 and 2.
  • the inductors 1 and 2 are coupled to each other by the M-coupling method.
  • a predetermined number of the inductors may be further arranged parallel to the inductors 1 and 2 in order to enhance the characteristic of the filter.
  • the characteristic of the filter is determined in the magnetic path type due to an induced current between two inductors 1 and 2 since the filter is coupled by the M-coupling method.
  • the frequency filter since it is impossible to form the frequency filter only by using the inductors 1 and 2, it is possible to adjust the frequency by using C s (a distribution capacity) between the PCB 8 and two high frequency inductors 1 and 2. Furthermore, the thickness of the PCB 8 is 2mm in maximum, the horizontal length thereof is 5mm in maximum, and the vertical length thereof is 6mm in maximum. Namely, it is possible to adjust the size of the filter based on user's desire.
  • Figure 2 illustrates the effects of the present invention.
  • the horizontal axis denotes a frequency from 100MHz to 1G
  • the vertical axis denotes dB
  • point 1 denotes -35.573dB
  • 335.634Mhz point 2 notes -7.2795dB
  • point 3 denotes -5.7768,429.000Mhz
  • point 4 denotes -22.085dB
  • the central frequency is 400Mhz. It is possible to fabricate a filter which is capable of processing the signals from 200Mhz to a few Ghz by improving the sample.
  • the filter structure for a radio device according to the present invention is basically directed to more effectively filtering the frequency by inserting the cylindrical inductors 1 and 2 into the PCB 8. In addition, it is possible to provide a lighter and more compact system, and reduce the fabrication cost.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

L'invention a trait à une structure améliorée de filtre pour dispositif radio, laquelle structure est à même de simplifier la construction d'un filtre, de diminuer les coûts de production et de donner lieu à de meilleures prestations. Cette structure de filtre comporte plusieurs inducteurs cylindriques à haute fréquence (1 et 2), plusieurs gorges d'insertion (3 et 4) dans lesquelles les inducteurs (1 et 2) sont insérés ainsi qu'une plaque de circuit imprimé (8) possédant une communication avec la terre (7) servant à mettre à la terre des terminaux d'entrée/sortie (5 et 6) et les inducteurs (1 et 2) après insertion des terminaux d'entrée/sortie (5 et 6) et des inducteurs (1 et 2). Dans le cadre de cette technique, les inducteurs (1 et 2) sont couplés grâce une méthode de couplage-M et l'on détermine une capacité de condensateur à l'aide d'une capacité de distribution (Cs) entre la plaque de circuit imprimé (8) et deux inducteurs à haute fréquence (1 et 2).
PCT/KR1997/000039 1996-11-22 1997-03-14 Structure de filtre pour dispositif radio WO1998023103A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU21060/97A AU2106097A (en) 1996-11-22 1997-03-14 Filter structure for radio device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1019960056563A KR19980037759A (ko) 1996-11-22 1996-11-22 무선기기의 필터 구조
KR1996/56563 1996-11-22

Publications (1)

Publication Number Publication Date
WO1998023103A1 true WO1998023103A1 (fr) 1998-05-28

Family

ID=19483132

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR1997/000039 WO1998023103A1 (fr) 1996-11-22 1997-03-14 Structure de filtre pour dispositif radio

Country Status (3)

Country Link
KR (1) KR19980037759A (fr)
AU (1) AU2106097A (fr)
WO (1) WO1998023103A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0038996A1 (fr) * 1980-04-28 1981-11-04 Oki Electric Industry Company, Limited Filtre aux hautes fréquences
EP0214492A2 (fr) * 1985-09-04 1987-03-18 Robert Bosch Gmbh Filtre de traversée à hautes fréquences
US5055809A (en) * 1988-08-04 1991-10-08 Matsushita Electric Industrial Co., Ltd. Resonator and a filter including the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0038996A1 (fr) * 1980-04-28 1981-11-04 Oki Electric Industry Company, Limited Filtre aux hautes fréquences
EP0214492A2 (fr) * 1985-09-04 1987-03-18 Robert Bosch Gmbh Filtre de traversée à hautes fréquences
US5055809A (en) * 1988-08-04 1991-10-08 Matsushita Electric Industrial Co., Ltd. Resonator and a filter including the same

Also Published As

Publication number Publication date
AU2106097A (en) 1998-06-10
KR19980037759A (ko) 1998-08-05

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