EP1041664A1 - Dual-band non-reversible circuit device - Google Patents

Dual-band non-reversible circuit device Download PDF

Info

Publication number
EP1041664A1
EP1041664A1 EP00106872A EP00106872A EP1041664A1 EP 1041664 A1 EP1041664 A1 EP 1041664A1 EP 00106872 A EP00106872 A EP 00106872A EP 00106872 A EP00106872 A EP 00106872A EP 1041664 A1 EP1041664 A1 EP 1041664A1
Authority
EP
European Patent Office
Prior art keywords
circulator
reversible circuit
band
reversible
component
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.)
Withdrawn
Application number
EP00106872A
Other languages
German (de)
English (en)
French (fr)
Inventor
Koji c/o Tokin Corporation Kamei
Atsushi c/o Tokin Corporation Furuta
Norihiko c/o Tokin Corporation Ono
Shigeyoshi C/O Tokin Corporation Yoshida
Kenji C/O Nec Corporation Takamoro
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.)
NEC Corp
Tokin Corp
Original Assignee
NEC Corp
Tokin Corp
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 NEC Corp, Tokin Corp filed Critical NEC Corp
Publication of EP1041664A1 publication Critical patent/EP1041664A1/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/32—Non-reciprocal transmission devices
    • H01P1/38—Circulators
    • H01P1/383—Junction circulators, e.g. Y-circulators
    • H01P1/387—Strip line circulators

Definitions

  • the present invention relates to a dual-band non-reversible circuit device used for transmitting and receiving wireless service which has two different frequencies in one terminal, the device operating in two different frequency bands in a mobile communication field.
  • JP-A Japanese Unexamined Patent Publication
  • H02-55406 55406/1990
  • the invention is characterized in that two circulators are arranged in a magnetic circuit. This constitution can facilitate the control of the intensity of a magnetic field and reduce the number of parts.
  • This prior art provides a circulator having a simple constitution.
  • the invention disclosed in the Japanese Unexamined Patent Publication (JP-A) No. H02-55406 will be described below.
  • the invention is the one relative to a circulator type hybrid.
  • This circulator type hybrid has two circulators arranged at its input side or output side.
  • Each of the circulators comprises an internal conductor and a ferrite.
  • a grounded conductor and a magnet are laminated on each circulator.
  • the above-mentioned two circulators are fixed to sandwich a magnetic body made of iron or the like between them. With this structure, the impedance matching of the input side or the output side of the hybrid can be performed.
  • the magnets corresponding to the two circulators are magnetized, they can be magnetized at the same time by a magnetic field in the same direction.
  • the magnets corresponding to the two circulators can be magnetized simultaneously at the same magnetic field, the intensity of each magnetic field can be easily controlled.
  • the number of parts constituting a circulator type hybrid decrease.
  • the structure of the hybrid simplifies.
  • the present invention has been made in consideration of these problems. It is the object of the present invention to provide a dual-band non-reversible circuit device which does not suffer deterioration through insertion loss even if two non-reversible circuits are connected in parallel and has a wide bandwidth, a compact and low-profile shape, and a simple structure.
  • An antenna sharing device constituted by a diplexer, a switch, a lowpass-filter (hereinafter referred to as LPF), and a band-pass-filter (hereinafter referred to as BPF) and capable of corresponding to two frequency bands is well known.
  • LPF lowpass-filter
  • BPF band-pass-filter
  • a dual-band non-reversible circuit device in accordance with the present invention has, in a case, a first non-reversible circuit component and a second circuit component each of which includes at least a ferrite plate, a central conductor, a magnet, and a grounded conductor.
  • the first non-reversible circuit component operates in a first frequency band and the second non-reversible circuit component operates in a second frequency band, wherein the first frequency band is different from the second frequency band.
  • the first non-reversible circuit component has a lumped constant type frequency band toward the low frequency side.
  • the second non-reversible circuit component has a distributed constant type frequency band toward the high frequency side.
  • Each of the first and the second non-reversible circuit components has a primary Chebyshev circuit including an inductor and a condenser connected in series to the input/ output terminals thereof. Therefore, they can unerringly operate in a broad-band system.
  • the first and the second non-reversible circuit components are connected in parallel to each other via an impedance matching circuit for matching their impedance. This makes it possible to control impedance easily.
  • An antenna is connected to the impedance matching circuit so that the antenna is connected in common to the first and the second non-reversible circuit components. That is, an antenna sharing device having no power consumption and little insertion loss can be constituted by using the non-reversible circuit devices as antenna sharing devices corresponding to two frequencies.
  • a transmitting device and a receiving device for the first frequency band is connected to the terminal of the first non-reversible circuit component
  • a transmitting device and a receiving device corresponding to the second frequency band is connected to the terminal of the second non-reversible circuit component.
  • the first and the second non-reversible circuit components function as circulators or isolators. Either the first or the second non-reversible circuit components may be an isolator and the other may be a circulator.
  • FIGs. 1A and 1B are views showing the constitution of a conventional circulator type hybrid.
  • FIG. 2 is an illustration showing the constitution of a conventional dual-band type antenna sharing device.
  • FIG. 3 is an exploded perspective view showing one preferred embodiment of a dual-band non-reversible circuit device in accordance with the present invention.
  • FIG. 4 is an illustration showing the circuit constitution of a circulator for an 800 MHz band.
  • FIG. 5 is an illustration showing the structure of a distributed constant type non-reversible circuit element.
  • FIG. 6 is an illustration showing one preferred embodiment of the connection of a circulator for an 800 MHz band and a circulator for a 1.9 GHz band.
  • FIG. 7 is a cross-sectional view showing the constitution of a dual-band non-reversible circuit device in accordance with one preferred embodiment of the present invention.
  • FIG. 8 is a cross-sectional view showing the constitution of a dual-band non-reversible circuit device in accordance with another preferred embodiment of the present invention.
  • FIG. 9A is an illustration showing the frequency characteristics in the 800 MHz band of a dual circulator in accordance with the present invention.
  • FIG. 9B is an illustration showing the frequency characteristics in the 1.9 GHz band of a dual circulator in accordance with the present invention.
  • FIG. 10 is an illustration of an example in which a dual-band circulator in accordance with the present invention is applied to a device for PDC/800 MHz transmitting and receiving and a device for PHS/1.9 GHz transmitting and receiving.
  • FIGS. 1A and 1B A conventional combination of circulator and hybrid (disclosed in Japanese Unexamined Patent Publication (JP-A) No. H02-55406) will be described below specifically with reference to FIGs. 1A and 1B.
  • the invention disclosed in the official gazette is the one relating to a circulator type hybrid.
  • This circulator type hybrid as shown in FIGS. 1A and 1B, has two circulators 4, 14 arranged at the input side or the output side of the hybrid.
  • the circulator 4 is constituted by an internal conductor 5 and a ferrite 6.
  • the circulator 14 is constituted by an internal conductor 15 and a ferrite 16.
  • a grounded conductor 7 and a magnet 8 are laminated on the circulator 4.
  • a grounded conductor 17 and a magnet 18 are laminated on the circulator 14.
  • the circulator 4 and the circulator 14 are fixed to sandwich a magnetic body 11 made of iron or the like between them. This structure can match the impedance of the input side or the output side of the hybrid.
  • magnets 8, 18 corresponding to the two circulators 4, 14 are magnetized, they can be magnetized at the same time by a magnetic field in the same direction.
  • the magnets corresponding to the two circulators can be magnetized simultaneously at the same magnetic field, the intensity of each magnetic field can be easily controlled.
  • the number of parts constituting a circulator type hybrid decrease.
  • the structure of the hybrid simplifies.
  • the present invention has been made in consideration of these problems. It is the object of the present invention to provide a dual-band non-reversible circuit device which does not suffer deterioration through insertion loss even if two non-reversible circuits are connected in parallel and has a wide bandwidth, a compact and low-profile shape, and a simple structure.
  • FIG. 2 a constitution shown in FIG. 2 has been proposed as an antenna sharing device corresponding to two frequency bands.
  • a diplexer 21, switches 22, 23, low-pass-filters (LPF) 24, 26, bandpass-filters (BPF) 25, 27 to the device all cause the loss of the transmitting and receiving signal, the total loss is great. This in turn results in a shortage of transmitting power and the deterioration of receiving sensitivity. Further, when the switch is changed over, power is consumed. Therefore, the life of a battery shortens.
  • FIG. 3 The structure of a dual-band circulator corresponding to two frequency bands of a PDC/ 800 MHz band and a PHS/1.9 MHz band is shown in FIG. 3.
  • a circulator component 101 for the PDC/ 800 MHz band is constituted by a ferrite disk 102 and a network-shaped central conductor 103 bonded thereto.
  • the circulator component 101 for the PDC/ 800 MHz band uses 810 MHz to 830 MHz for a receiving band and 940 MHz to 960 MHz for a transmitting band. Therefore, in order to cover all transmitting and receiving bands, it is necessary for the circulator component 101 for the PDC/ 800 MHz band to be adapted to 810 MHz to 960 MHz.
  • the pass bandwidth of the circulator is usually about 80 MHz.
  • a coil 107 and a condenser 108 are connected in series to the input/ output terminals 104, 105, 106 of the circulator 101. This is because it is necessary to produce a Chebyshev characteristic in a broad band. Therefore, this can ensure the bandwidth of 150 MHz necessary for the circulator 101 for the PDC/ 800 MHz band.
  • the coil 107 and the condenser 108 are housed on a packaging substrate 125.
  • a ring-shaped dielectric plate 111 surrounds the outer periphery of a ferrite disk 110.
  • a central conductor 112 is formed on the ferrite disk 110 and an electrode 113 is formed on the dielectric plate 111 to produce capacitance 114.
  • the central conductor 112 and the capacitance 114 constitute an equivalent low-pass filter. This increases the amount of attenuation in the frequency band 2 or 3 times that of the pass band to prevent harmonics. Also, this simple structure can simplify the manufacturing process.
  • the circulator component 101 for the 800 MHz band and the circulator component 109 for the 1.9 GHz band are arranged to sandwich a grounded substrate 115 having conductive films on both surfaces. Spacers 124 are used for evening the tops of the circulator components 101, 109.
  • the two circulator components 101, 109 are connected to input/output terminals via pins 130.
  • the circulator component for the 800 MHz band and a circulator component the 1.9 GHz band are constituted by use of a distributed constant type component
  • the circulator component for the 1.9 GHz band is smaller in size in the radial direction than the circulator component for the 800 MHz band.
  • a lumped constant type circulator component can be made smaller in size in the radial direction than a distributed constant type circulator component. If a circulator component for the 800 MHz band uses a lumped constant type component and a circulator component for the 1.9 GHz band uses a distributed constant type component, the two circulator components are nearly same size in the radial direction.
  • this is a suitable structure for overlaying one circulator component on the other one. Further, since the distributed type circulator component is thin in structure, the distributed constant type circulator component can be made tall as compared with a combination of two lumped constant type circulator components.
  • the terminal 106 of the circulator component 101 (for the 800 MHz band) and the terminal 116 of the circulator component 109 (for the 1.9 GHz band), as shown in FIG. 6, are in parallel connected to a common terminal 121 via an impedance matching circuit.
  • the impedance matching circuit comprises coils 119 and a condenser 120.
  • the coils 119 and the condenser 120 are mounted on the housing substrate 125. It is possible to control impedance matching easily by freely selecting the constant of the coils 119 and the condenser 120.
  • a permanent magnet 122 is arranged over the ferrite disk 102 with a predetermined gap between them to produce a desired magnetic field.
  • Another permanent magnet 122 is arranged below the ferrite disk 109 with a predetermined gap between them to produce a desired magnetic field.
  • the permanent magnets 122 and the ferrite disks 102, 109 are inserted in metallic cases with yokes 123.
  • two circulator components 101, 109 are sandwiched by two permanent magnets 122, but as shown in FIG. 8, one permanent magnet 129 may be sandwiched by two circulator components 101, 109.
  • An RF signal inputted from the common terminal 121 is outputted to terminals 117, 127.
  • An RF signal inputted from terminals 126, 118 is outputted to the common terminal 121.
  • the RF signal inputted from the common terminal 121 is outputted to terminals 126, 118 by reversing the direction of the magnetic field.
  • the RF signal entered from the terminals 117, 127 can also be outputted to the common terminal 121.
  • the circulator for the 800 MHz band is constituted by a ferrite having a diameter ( ⁇ ) of 4 mm and a magnetic field density (4 ⁇ Ms) of 760 Gauss and an central conductor having a width (d) of 1 mm.
  • Capacitance (C1) for forming an LPF is 12 pF and the inductance (Ls) of a coil for a broad band is 10 nH and the capacitance (Cs) of a condenser for a broad band is 1.5 pF.
  • the circulator for the 1.9 GHz band is constituted by a ferrite having a diameter ( ⁇ ) of 3.5 mm and a magnetic field density (4 ⁇ Ms) of 550 Gauss and an central conductor having a width (d) of 0.5 mm.
  • the frequency characteristics in the 800 MHz band of the dual circulator in accordance with the present invention are shown in FIG. 9A and the frequency characteristics in the 1.9 GHz band thereof are shown in FIG. 9B, respectively.
  • FIG. 10 is an illustration showing an example in which the above mentioned dual-band circulator is applied to a transmitting and receiving device corresponding to PDC/800 MHz and a transmitting and receiving device corresponding to PHS/1.9 GHz.
  • An antenna 135 is connected to the common terminal 121 of the dual-band circulator.
  • An 800 MHz transmtting device 131 and an 800 MHz receiving device 134 which correspond to PDC/800 MHz are connected to the terminals 126 and 127, respectively.
  • a 1.9 GHz receiving device 133 and a 1.9 GHz transmitting device 132 which correspond to PHS/1.9 GHz are connected to the terminals 117 and 118, respectively.
  • a dual-band antenna sharing device described in this preferred embodiment has little insertion loss and little power consumption as compared with a conventional dual-band antenna sharing device changed over with a selector switch.
  • the dual-band circulator in accordance with the present invention can also correspond to a broad band system if a primary Chebyshev circuit is added thereto. Also, the dual-band circulator in accordance with the present invention can prevent higher harmonics by use of a distributed constant type non-reversible circuit component. Also, since the dual-band circulator in accordance with the present invention has a simple structure, it is possible to reduce costs and to increase productivity. Further, according to the present invention, two non-reversible circuit components are connected in parallel via a impedance matching circuit including a coil, a condenser, and the like and hence an impedance matching can be controlled easily.
  • non-reversible circuit devices are used as antenna sharing devices corresponding to two frequencies, they can constitute antenna sharing devices having no power consumption and little insertion loss.

Landscapes

  • Non-Reversible Transmitting Devices (AREA)
  • Transceivers (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
EP00106872A 1999-03-30 2000-03-30 Dual-band non-reversible circuit device Withdrawn EP1041664A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP11089195A JP2000286611A (ja) 1999-03-30 1999-03-30 デュアルバンド非可逆回路装置
JP8919599 1999-03-30

Publications (1)

Publication Number Publication Date
EP1041664A1 true EP1041664A1 (en) 2000-10-04

Family

ID=13963943

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00106872A Withdrawn EP1041664A1 (en) 1999-03-30 2000-03-30 Dual-band non-reversible circuit device

Country Status (4)

Country Link
EP (1) EP1041664A1 (no)
JP (1) JP2000286611A (no)
CN (1) CN1271975A (no)
NO (1) NO20001663L (no)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1688871A2 (en) * 2001-11-21 2006-08-09 Mineral Lassen LLC Wireless communication device interconnectivity
US7536155B2 (en) 2001-11-21 2009-05-19 Ian J Forster Wireless communication device interconnectivity
US7978018B2 (en) 2008-02-20 2011-07-12 Ntt Docomo, Inc. Non-reciprocal circuit device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007274465A (ja) * 2006-03-31 2007-10-18 Nec Corp 無線装置
KR101601113B1 (ko) * 2014-08-26 2016-03-08 홍익대학교 산학협력단 비가역 회로 소자

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0777290A1 (en) * 1995-11-28 1997-06-04 Tokin Corporation Dual-band nonreversible circuit device comprising two nonreversible circuit elements contained in a single housing to be operable in different frequency bands
EP0903802A2 (en) * 1997-09-17 1999-03-24 K Laboratory Co. Lumped element circulator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0777290A1 (en) * 1995-11-28 1997-06-04 Tokin Corporation Dual-band nonreversible circuit device comprising two nonreversible circuit elements contained in a single housing to be operable in different frequency bands
EP0903802A2 (en) * 1997-09-17 1999-03-24 K Laboratory Co. Lumped element circulator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
E. SCHLOEMANN: "MINIATURE CIRCULATORS", IEEE TRANSACTIONS ON MAGNETICS., vol. 25, no. 5, September 1989 (1989-09-01), IEEE INC. NEW YORK., US, pages 3236 - 3241, XP002139921, ISSN: 0018-9464 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1688871A2 (en) * 2001-11-21 2006-08-09 Mineral Lassen LLC Wireless communication device interconnectivity
EP1688871B1 (en) * 2001-11-21 2008-08-27 Mineral Lassen LLC Wireless communication device interconnectivity
US7536155B2 (en) 2001-11-21 2009-05-19 Ian J Forster Wireless communication device interconnectivity
US7623831B2 (en) 2001-11-21 2009-11-24 Ian J Forster Wireless communication device interconnectivity
US7978018B2 (en) 2008-02-20 2011-07-12 Ntt Docomo, Inc. Non-reciprocal circuit device

Also Published As

Publication number Publication date
CN1271975A (zh) 2000-11-01
JP2000286611A (ja) 2000-10-13
NO20001663D0 (no) 2000-03-30
NO20001663L (no) 2000-10-02

Similar Documents

Publication Publication Date Title
EP0916185B1 (en) Dual-band multilayer bandpass filter
EP0948079B1 (en) Nonreciprocal circuit device
US6639485B2 (en) Nonreciprocal circuit device and communication device using same
JPH11186819A (ja) 帯域阻止フィルタ及びデュプレクサ
US7978018B2 (en) Non-reciprocal circuit device
EP1041664A1 (en) Dual-band non-reversible circuit device
EP1895616B1 (en) Irreversible circuit element
US6690248B2 (en) Nonreciprocal circuit device including ports having different characteristic impedances and communication apparatus including same
JP2001332908A (ja) 非可逆回路素子および通信装置
JP4345254B2 (ja) 非可逆回路素子及び通信装置
KR100435810B1 (ko) 비가역 회로 소자, 비가역 회로 및 통신 장치
US6882262B2 (en) Nonreciprocal circuit device and communication device using same
JP3558003B2 (ja) 非可逆回路素子および通信装置
EP1087459A2 (en) Nonreciprocal circuit device and communication apparatus incorporating same
US6369668B1 (en) Duplexer and communication apparatus including the same
JP4811578B2 (ja) 非可逆回路素子及び通信機器
US6597253B2 (en) Nonreciprocal circuit device and communication apparatus including the same
US6768392B2 (en) Nonreciprocal circuit device and communication apparatus incorporating the same
US7429901B2 (en) Non-reciprocal circuit element, composite electronic component, and communication apparatus
JP2001320205A (ja) 非可逆回路素子および通信装置
JP2000357902A (ja) 平面フィルタおよびそれを用いたデュプレクサおよびそれらを用いた高周波モジュールおよびそれを用いた通信装置
JPH1079607A (ja) 非可逆回路素子
JP2003060409A (ja) ブルートゥース用ｒｆモジュール
JP2003124710A (ja) 非可逆回路モジュール
JPH0575304A (ja) 能動素子を含む電気回路を一体に組み込んだ誘電体フイルタ

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FI FR GB SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20001211

17Q First examination report despatched

Effective date: 20010308

AKX Designation fees paid

Free format text: DE FI FR GB SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20020219