JPH02262304A - Faraday rotation element - Google Patents
Faraday rotation elementInfo
- Publication number
- JPH02262304A JPH02262304A JP1084498A JP8449889A JPH02262304A JP H02262304 A JPH02262304 A JP H02262304A JP 1084498 A JP1084498 A JP 1084498A JP 8449889 A JP8449889 A JP 8449889A JP H02262304 A JPH02262304 A JP H02262304A
- Authority
- JP
- Japan
- Prior art keywords
- ferrite
- faraday rotation
- faraday
- batio3
- sintered body
- 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.)
- Granted
Links
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 229910052742 iron Inorganic materials 0.000 claims abstract description 3
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 3
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 3
- 239000002184 metal Substances 0.000 claims abstract description 3
- 229910052751 metal Inorganic materials 0.000 claims abstract description 3
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 3
- 229910052573 porcelain Inorganic materials 0.000 claims abstract description 3
- 229910052725 zinc Inorganic materials 0.000 claims abstract 2
- 239000002131 composite material Substances 0.000 claims description 2
- 229910002113 barium titanate Inorganic materials 0.000 abstract description 10
- 229910000708 MFe2O4 Inorganic materials 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 229910052802 copper Inorganic materials 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract 1
- 239000000843 powder Substances 0.000 description 8
- 229910018605 Ni—Zn Inorganic materials 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229910000008 nickel(II) carbonate Inorganic materials 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Landscapes
- Soft Magnetic Materials (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、非可逆回路素子に関し、更に詳しくは準ミリ
波帯からミリ波帯において用いられる非可逆回路素子で
あるファラデー回転形のサーキュレータやアイソレータ
等を構成するファラデー旋回子に関するものである。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to non-reciprocal circuit elements, and more specifically to Faraday rotation type circulators and non-reciprocal circuit elements used in the sub-millimeter wave band to the millimeter wave band. This invention relates to a Faraday rotator that constitutes an isolator and the like.
［従来の技術］
従来、非可逆回路素子にはサーキュレータ、アイソレー
タ及びジャイレータがあるが、例えばファラデー回転形
のサーキュレータは第１図に示されており、円形導波管
５は端子１と端子２とが４５度にねじれており、更に端
子３と端子４も４５度ねじれて設けられている。また第
２図にはファラデー回転形のアイソレータが示されてお
り、円形導波管５は端子１と２及び抵抗板７１と７２と
がそれぞれ４５度ねじれて設けられている。これらの導
波管５には、いづれもその中央に４５度ファラデー旋回
子を有している。[Prior Art] Conventionally, nonreciprocal circuit elements include circulators, isolators, and gyrators. For example, a Faraday rotation type circulator is shown in FIG. is twisted at 45 degrees, and terminals 3 and 4 are also twisted at 45 degrees. Further, FIG. 2 shows a Faraday rotation type isolator, in which the circular waveguide 5 is provided with terminals 1 and 2 and resistance plates 71 and 72 twisted by 45 degrees. Each of these waveguides 5 has a 45 degree Faraday rotator at its center.
このファラデー旋回子は、ＭＦｅ２Ｏ４の組成式で表さ
れるフェライト、特に（Ｎｉ−Ｚｎ） Ｆｅ２Ｏ４を用
いて構成されているものであった。This Faraday rotator was constructed using ferrite represented by the composition formula MFe2O4, particularly (Ni-Zn)Fe2O4.
［発明が解決しようとする問題点］
しかしながら、上記のファラデー旋回子を構成するフェ
ライトは、使用周波数帯（準ミリ波帯からミリ波帯）に
おける比透磁率がほぼ１であり、また比誘電率が８〜２
０程度と小さいため単位長さ当りのファラデー回転角θ
が小さい。したがってフェライトの伝送方向の長さが長
くなり、そのために必要以上に小型化することができな
かった。[Problems to be Solved by the Invention] However, the ferrite constituting the Faraday rotator described above has a relative magnetic permeability of approximately 1 in the frequency band used (from the quasi-millimeter wave band to the millimeter wave band), and has a relative dielectric constant of approximately 1. is 8~2
Faraday rotation angle θ per unit length because it is small, about 0.
is small. Therefore, the length of the ferrite in the transmission direction becomes long, which makes it impossible to make the device smaller than necessary.
そこで、本発明者等は、前記のファラデー旋回子をより
小型化するためには、単位長さ当りのファラデー回転角
θの大きな材料を用いる必要があるので、ファラデー回
転角θの大きな材料について種々検討した結果、フェラ
イトにＢａＴｉＯ３を混合することにより好ましい結果
が得られることを見出した。本発明はこの知見に基づい
てなされたものである。Therefore, in order to further downsize the Faraday rotator, the present inventors need to use a material with a large Faraday rotation angle θ per unit length, so we have developed various materials with a large Faraday rotation angle θ. As a result of investigation, it was found that preferable results could be obtained by mixing BaTiO3 with ferrite. The present invention has been made based on this knowledge.
したがって、本発明の目的は、非可逆回路素子を小型化
し得る小型のファラデー旋回子を提供することにある。Therefore, an object of the present invention is to provide a small-sized Faraday rotator that can reduce the size of non-reciprocal circuit elements.
［問題点を解決するための手段］
本発明の前記目的は、
１）ファラデー回転形の非可逆回路素子を構成するファ
ラデー旋回子において、該ファラデー旋回子がフェライ
トとＢａＴｉＯ３の混合焼結体からなることを特徴とす
るファラデー旋回子。[Means for Solving the Problems] The above objects of the present invention are as follows: 1) A Faraday rotator constituting a Faraday rotation type non-reciprocal circuit element, the Faraday rotator comprising a mixed sintered body of ferrite and BaTiO3. A Faraday rotator characterized by:
２）第１項記載のフェライトがＭＦｅ２Ｏ４の組成式で
表され、式中のＭがＭｎ、Ｎｉ、Ｍｇ、Ｃｏ、Ｃｕ、Ｚ
ｎ及びＦｅからなる群より選択される少なくとも一つの
金属であることを特徴とするファラデー旋回子。2) The ferrite described in item 1 is represented by the composition formula MFe2O4, and M in the formula is Mn, Ni, Mg, Co, Cu, or Z.
A Faraday swirler characterized in that it is made of at least one metal selected from the group consisting of n and Fe.
３）第１項記載のフェライトとＢａＴｉＯ３の混合焼結
体がフェライトとＢａＴｉＯ３を重量割合で５；５〜７
：３で混合し、焼結した複合磁器材料であることを特徴
とするファラデー旋回子によってそれぞれ達成された。3) The mixed sintered body of ferrite and BaTiO3 described in item 1 has a weight ratio of ferrite and BaTiO3 of 5; 5 to 7.
:3 and sintered composite porcelain materials, respectively, were achieved by a Faraday swirler.
以下、本発明を実施例を参考にして説明する。The present invention will be described below with reference to Examples.
しかしながら、この実施例は本発明の実施態様のってあ
り、本発明はこの実施例に限定されるものではない。However, this example is only an embodiment of the present invention, and the present invention is not limited to this example.
実施例
以下、フェライトとして、（Ｎｉ−Ｚｎ） Ｆｅ２Ｏ４
を主体に用いたものについて示すが、この手法に限定さ
れるものではない。In the examples below, as ferrite, (Ni-Zn) Fe2O4
The method mainly used is shown below, but it is not limited to this method.
まずＮｉＣ０，、ＺｎＯ，Ｆｅ２Ｏ３を出発原料とし、
ＮｉＣＯ３：ＺｎＯ：Ｆｅ２Ｏ＋ ＝ ３ ： ７ ：
１０のモル比で混合した後、１０００℃で仮焼し、
得られた仮焼物を更に粉砕して（Ｎ１ｏ３−Ｚｎｏ、
ｙ） Ｆｅ２Ｑ４粉末を得た。First, NiC0, ZnO, Fe2O3 are used as starting materials,
NiCO3:ZnO:Fe2O+ = 3: 7:
After mixing at a molar ratio of 10, calcined at 1000°C,
The obtained calcined product was further crushed (N1o3-Zno,
y) Fe2Q4 powder was obtained.
次にＢａ（：０３．ＴｉＯ□を出発原料とし、ＢａＣＯ
３：ＴｉＯ２・１．１のモル比で混合した後、１１５０
℃で仮焼し、得られた仮焼物を更に粉砕してＢａＴｉＯ
３粉末を得た。Next, using Ba(:03.TiO□ as a starting material, BaCO
3: After mixing at a molar ratio of TiO2・1.1, 1150
Calcined at ℃, and the resulting calcined product is further crushed to form BaTiO
3 powder was obtained.
前記の如くして得られた（ Ｎｔｏ、 ５Ｚｎｏ、 ７
） Ｆｅ２Ｏ４粉末とＢａＴｉ（１＋粉末とを適当量混
合した後、１２５０ｔの温度で４〜１０時間焼成して、
表に示される比透磁率及び比誘電率の混合焼結体を得た
。Obtained as described above (Nto, 5Zno, 7
) After mixing appropriate amounts of Fe2O4 powder and BaTi (1+ powder), it was fired at a temperature of 1250 t for 4 to 10 hours.
A mixed sintered body having the relative magnetic permeability and relative dielectric constant shown in the table was obtained.
この混合焼結体の単位長さ当りのファラデー回１云角θ
は（Ｎ１ｏ３−Ｚｎｏ、 ｔ） Ｆｅ２Ｏ４粉末とＢａ
Ｔｉ０＊粉末との混合割合によって異なり、第３図のグ
ラフからその混合割合はＢａＴｉＯ３が重量割合で３０
〜５０％の範囲のものが良好であることがわかる。Faraday times 1 angle θ per unit length of this mixed sintered body
is (N1o3-Zno, t) Fe2O4 powder and Ba
It depends on the mixing ratio with Ti0* powder, and from the graph in Figure 3, the mixing ratio is 30% by weight of BaTiO3.
It can be seen that a range of 50% is good.
このようにして得られた混合焼結体を４５度ファラデー
回転角が得られる長さとして０．６ｍｍｔの円柱形に加
工した。The mixed sintered body thus obtained was processed into a cylindrical shape with a length of 0.6 mm to provide a 45 degree Faraday rotation angle.
［発明の効果コ
本発明は、ファラデー旋回子のフェライト材料として、
フェライトにＢａＴｉ０．を混合し焼結したので、ファ
ラデー旋回子の伝搬方向の長さを１／３いかにすること
ができる。更に従来のフェライトに比べ、比誘電率が１
０倍以上大きいので、断面方向の大きさも同様に小さく
することができる。[Effects of the Invention] The present invention provides a ferrite material for a Faraday rotator.
BaTi0. By mixing and sintering, the length of the Faraday rotator in the propagation direction can be reduced to 1/3. Furthermore, compared to conventional ferrite, the dielectric constant is 1.
Since it is 0 times larger, the size in the cross-sectional direction can be similarly reduced.
第１図は、本発明のファラデー旋回子を適用したファラ
デー回転形サーキュレータを示す斜視図である。
第２図は、本発明のファラデー旋回子を適用したファラ
デー回転形アイソレータを示す斜視図である。
第３図は、ファラデー回転角と（Ｎ１ｏ３−Ｚｎｏ、
ｙ）Ｆｅ、Ｏ４
粉末とＢａＴｉＯ３粉末との混合割合との関係を示すグ
ラフである。
符号の説明
２．
３、
・端子
円形導波管
フェラデー旋回子
７１゜
７２ ・
抵抗板FIG. 1 is a perspective view showing a Faraday rotary circulator to which the Faraday rotator of the present invention is applied. FIG. 2 is a perspective view showing a Faraday rotary isolator to which the Faraday rotator of the present invention is applied. Figure 3 shows the Faraday rotation angle and (N1o3-Zno,
y) It is a graph showing the relationship between the mixing ratio of Fe, O4 powder and BaTiO3 powder. Explanation of symbols 2. 3. ・Terminal circular waveguide Feraday swivel 71°72 ・Resistance plate
Claims (1)
ラデー旋回子において、該ファラデー旋回子がフェライ
トとＢａＴｉＯ＿３の混合焼結体からなることを特徴と
するファラデー旋回子。 ２）請求項１記載のフェライトがＭＦｅ＿２Ｏ＿４の組
成式で表され、式中のＭがＭｎ，Ｎｉ，Ｍｇ，Ｃｏ，Ｃ
ｕ，Ｚｎ及びＦｅからなる群より選択される少なくとも
一つの金属であることを特徴とするファラデー旋回子。 ３）請求項１記載のフェライトとＢａＴｉＯ＿３の混合
焼結体がフェライトとＢａＴｉＯ＿３を重量割合で５：
５〜７：３で混合し、焼結した複合磁器材料であること
を特徴とするファラデー旋回子。[Scope of Claims] 1) A Faraday rotator constituting a Faraday rotation type non-reciprocal circuit element, characterized in that the Faraday rotator is made of a mixed sintered body of ferrite and BaTiO_3. 2) The ferrite according to claim 1 is represented by the composition formula MFe_2O_4, where M is Mn, Ni, Mg, Co, or C.
A Faraday swirler characterized in that it is made of at least one metal selected from the group consisting of u, Zn, and Fe. 3) The mixed sintered body of ferrite and BaTiO_3 according to claim 1 has a weight ratio of ferrite and BaTiO_3 of 5:
A Faraday swirler characterized in that it is a composite porcelain material mixed in a ratio of 5 to 7:3 and sintered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1084498A JP2775826B2 (en) | 1989-04-03 | 1989-04-03 | Faraday swirl |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1084498A JP2775826B2 (en) | 1989-04-03 | 1989-04-03 | Faraday swirl |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02262304A true JPH02262304A (en) | 1990-10-25 |
| JP2775826B2 JP2775826B2 (en) | 1998-07-16 |
Family
ID=13832310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1084498A Expired - Lifetime JP2775826B2 (en) | 1989-04-03 | 1989-04-03 | Faraday swirl |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2775826B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62147703A (en) * | 1985-12-20 | 1987-07-01 | Yoshiyuki Naito | High permittivity oxide magnetic material |
-
1989
- 1989-04-03 JP JP1084498A patent/JP2775826B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62147703A (en) * | 1985-12-20 | 1987-07-01 | Yoshiyuki Naito | High permittivity oxide magnetic material |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2775826B2 (en) | 1998-07-16 |
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