JPH0720001B2 - High frequency filter - Google Patents
High frequency filterInfo
- Publication number
- JPH0720001B2 JPH0720001B2 JP18293086A JP18293086A JPH0720001B2 JP H0720001 B2 JPH0720001 B2 JP H0720001B2 JP 18293086 A JP18293086 A JP 18293086A JP 18293086 A JP18293086 A JP 18293086A JP H0720001 B2 JPH0720001 B2 JP H0720001B2
- Authority
- JP
- Japan
- Prior art keywords
- tuning circuit
- conductor
- line
- frequency filter
- high frequency
- 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.)
- Expired - Lifetime
Links
- 239000004020 conductor Substances 0.000 claims description 13
- 230000008878 coupling Effects 0.000 claims description 10
- 238000010168 coupling process Methods 0.000 claims description 10
- 238000005859 coupling reaction Methods 0.000 claims description 10
- 239000012212 insulator Substances 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 8
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、各種電子機器に使用されるUHF帯用などの高
周波フィルタに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high frequency filter for the UHF band used in various electronic devices.
従来の技術 UHF帯用の高周波フィルタとして、通常、λ/2形共振回
路及びλ/4形共振回路が利用されているが、いずれの場
合も共振線路の一方又は両方の側に波長短縮コンデンサ
を接続している。さらに他の例としてλ/2長の銅線をボ
ビンに巻回したヘリカルコイルもある。Conventional technology λ / 2 type resonance circuits and λ / 4 type resonance circuits are usually used as high frequency filters for the UHF band.In either case, a wavelength shortening capacitor is used on one or both sides of the resonance line. Connected. Still another example is a helical coil in which a λ / 2-length copper wire is wound around a bobbin.
発明が解決しようとする問題点 このように従来の例ではいずれの場合もλ/4以上の長さ
が必要で小型化できないといった問題点があった。Problems to be Solved by the Invention As described above, in any of the conventional examples, there is a problem that the length of λ / 4 or more is required and the size cannot be reduced.
本発明はこのような問題点を解決するとともに、帯域特
性を比較的容易に調整できるλ/4以下の長さの共振線路
で構成する高周波フィルタを提供することを目的とする
ものである。It is an object of the present invention to solve the above problems and to provide a high frequency filter composed of a resonant line having a length of λ / 4 or less, in which the band characteristic can be adjusted relatively easily.
問題点を解決するための手段 この問題点を解決するために本発明は、誘電体基板の一
主面上に略コ字状の共振線路と、この共振線路の切断部
に第一の容量を接続し、切断部の一端あるいは共振線路
と外部接続端子とを第二の容量あるいは結合線路を介し
て接続した第一の同調回路を設けるとともに、この第一
の同調回路と同じ構成の第二の同調回路を設け、前記略
コ字状の共振線路の任意の一辺を近接結合し、この結合
部の上面に絶縁物を介して導体を設けた構成とするもの
である。Means for Solving the Problems In order to solve this problem, the present invention provides a substantially U-shaped resonant line on one main surface of a dielectric substrate and a first capacitor at a cut portion of the resonant line. A first tuning circuit is provided in which one end of the disconnection portion or the resonance line and the external connection terminal are connected to each other via the second capacitance or the coupling line, and a second tuning circuit having the same configuration as the first tuning circuit is provided. A tuning circuit is provided, any one side of the substantially U-shaped resonance line is closely coupled, and a conductor is provided on the upper surface of this coupling portion via an insulator.
作用 この構成により、λ/4以下の長さの共振線路で小型の高
周波フィルタを得ることができ、略コ字状の共振線路の
結合部の上面に絶縁物を介して導体を設け、挿入損失帯
域巾等の特性を向上することができるとともに、その位
置，大きさを変えることにより、前記の特性を調整する
ことができ、小型化のため高精度を要する高周波フィル
タの歩留りが良くなる等設計，製作上非常に有利とな
る。Action With this configuration, a small high-frequency filter can be obtained with a resonant line of λ / 4 or less, and a conductor is provided on the upper surface of the coupling part of the substantially U-shaped resonant line via an insulator to prevent insertion loss. Design such that characteristics such as bandwidth can be improved, and that the characteristics can be adjusted by changing the position and size, and the yield of high-frequency filters that require high precision for downsizing is improved. ， It is very advantageous in production.
実施例 以下図面に従って本発明の実施例を説明する。Embodiments Embodiments of the present invention will be described below with reference to the drawings.
第１図は略コ字状共振線路で構成した本発明の実施例に
よる高周波フィルタの誘電体基板上の平面構成図、第２
図は同要部側面図、第３図は他の実施例の同平面構成
図、第４図は特性図である。FIG. 1 is a plan view of a dielectric substrate of a high frequency filter according to an embodiment of the present invention, which is composed of a substantially U-shaped resonance line, and FIG.
FIG. 4 is a side view of the same main portion, FIG. 3 is a plan view of another embodiment, and FIG. 4 is a characteristic view.
この高周波フィルタは誘電体基板９の一主面上に、第１
図に示すように略コ字状の共振線路１の切断部２に第一
の容量３を接続し、切断部２の一端と外部接続端子４と
を第二の容量５を介して接続した第一の同調回路11と、
この第一の同調回路11と同じ構成の第二の同調回路12と
を共振線路１の任意の一辺の線路部分で結合部６を設け
て結合する構成で、結合部６の上面に絶縁物７を介して
導体８を設ける。ここで絶縁物７と導体８は一体のもの
でも、別々に構成されるものでもよく、設ける位置と、
巾，長さ及び厚さ等の大きさは任意に設定できる。第２
図は先の実施例の要部側面図を示しており、誘電体基板
９の一主面である上面に、前記同調回路11,12を構成し
ており、他の主面である下面は銅箔をそのまゝ残して接
地導体10としている。ここでは、両面銅貼誘電体基板を
使用したマイクロストリップ線路構成を示したが、片面
銅貼誘電体基板の主面に前記同調回路11,12を構成し、
別途設けた導体に貼り合せる等してもよく、さらにスペ
ーサを介して導体に取り付けるサスペンデッド線路構成
にしてもよい。This high frequency filter is provided on the main surface of the dielectric substrate 9 with the first
As shown in the figure, the first capacitance 3 is connected to the cut portion 2 of the substantially U-shaped resonance line 1, and one end of the cut portion 2 and the external connection terminal 4 are connected via the second capacitance 5. One tuning circuit 11,
The first tuning circuit 11 and the second tuning circuit 12 having the same configuration are coupled by providing a coupling portion 6 at a line portion on one side of the resonance line 1, and an insulator 7 is provided on the upper surface of the coupling portion 6. The conductor 8 is provided through. Here, the insulator 7 and the conductor 8 may be integrated or may be separately configured.
Sizes such as width, length and thickness can be set arbitrarily. Second
The figure shows a side view of the main part of the previous embodiment. The tuning circuits 11 and 12 are formed on the upper surface, which is one main surface of the dielectric substrate 9, and the lower surface, which is the other main surface, is copper. The foil is left as it is for the grounding conductor 10. Here, a microstrip line configuration using a double-sided copper-clad dielectric substrate was shown, but the tuning circuits 11 and 12 are formed on the main surface of the single-sided copper-clad dielectric substrate,
It may be attached to a conductor provided separately, or may have a suspended line structure in which it is attached to the conductor via a spacer.
第３図は他の実施例を示す平面図であるが、前記、第二
の容量５を用いて外部接続端子４と接続する代りに、共
振線路１の一部に近接した結合線路13で接続することも
できる。第４図は本発明の実施例により得られる特性の
改善例で、Ｂが結合部に導体８を絶縁物７を介して設け
た場合の特性で、導体８を設けない場合の特性Ａに比べ
て、挿入損失，帯域巾共特性が改善されている。FIG. 3 is a plan view showing another embodiment. Instead of connecting the external connection terminal 4 using the second capacitor 5, the connection is made by a coupling line 13 close to a part of the resonance line 1. You can also do it. FIG. 4 shows an example of the improvement of the characteristics obtained by the embodiment of the present invention, where B is the characteristic when the conductor 8 is provided in the coupling portion through the insulator 7, and is compared with the characteristic A when the conductor 8 is not provided. As a result, the characteristics of both insertion loss and bandwidth are improved.
発明の効果 以上のように本発明によれば結合部の上面に絶縁物を介
して導体を設けることにより、挿入損失，帯域巾等の特
性を向上することができ、その位置，大きさを変えるこ
とにより、特性の調整が行え、小型化のため高精度を要
する高周波フィルタの歩留りが良くなる等、設計，製作
上非常に有利で、工業的に大きな効果が得られる。As described above, according to the present invention, by providing the conductor on the upper surface of the coupling portion through the insulator, the characteristics such as the insertion loss and the bandwidth can be improved, and the position and the size thereof can be changed. As a result, the characteristics can be adjusted, and the yield of high-frequency filters that require high precision for downsizing can be improved, which is very advantageous in design and manufacture and has a great industrial effect.
第１図は本発明の一実施例による高周波フィルタの平面
構成図、第２図は同要部側面図、第３図は他の実施例の
同平面構成図、第４図は特性図である。 １……共振線路、２……切断部、３……第一の容量、４
……外部接続端子、５……第二の容量、６……結合部、
７……絶縁物、８……導体、９……誘電体基板、10……
接地導体、13……結合線路。FIG. 1 is a plan view of a high-frequency filter according to an embodiment of the present invention, FIG. 2 is a side view of the same main portion, FIG. 3 is a plan view of another embodiment, and FIG. 4 is a characteristic view. . 1 ... Resonance line, 2 ... Cutting part, 3 ... First capacitance, 4
...... External connection terminal, 5 ...... Second capacitance, 6 ...... Coupling part,
7 ... Insulator, 8 ... Conductor, 9 ... Dielectric substrate, 10 ...
Ground conductor, 13 ... Coupled line.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭60−123102（ＪＰ，Ａ) 実開 昭56−123603（ＪＰ，Ｕ) 実開 昭56−96708（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-60-123102 (JP, A) Actually open Sho-56-123603 (JP, U) Actual-open Sho-56-96708 (JP, U)
Claims (1)
路と、この共振線路の切断部に第一の容量を接続し、切
断部の一端あるいは共振線路と外部接続端子とを第二の
容量あるいは結合線路を介して接続した第一の同調回路
を設けるとともに、この第一の同調回路と同じ構成の第
二の同調回路を設け、前記略コ字状の共振線路の任意の
一辺を近接結合し、この結合部の上面に絶縁物を介して
導体を設けてなる高周波フィルタ。1. A substantially U-shaped resonance line on one main surface of a dielectric substrate and a first capacitor connected to a cut portion of the resonance line, and one end of the cut portion or the resonance line and an external connection terminal. A second tuning circuit having the same configuration as the first tuning circuit, and a second tuning circuit having the same configuration as the first tuning circuit. A high frequency filter in which one side is closely coupled, and a conductor is provided on the upper surface of this coupling portion via an insulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18293086A JPH0720001B2 (en) | 1986-08-04 | 1986-08-04 | High frequency filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18293086A JPH0720001B2 (en) | 1986-08-04 | 1986-08-04 | High frequency filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6338301A JPS6338301A (en) | 1988-02-18 |
| JPH0720001B2 true JPH0720001B2 (en) | 1995-03-06 |
Family
ID=16126858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18293086A Expired - Lifetime JPH0720001B2 (en) | 1986-08-04 | 1986-08-04 | High frequency filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0720001B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03262303A (en) * | 1990-03-13 | 1991-11-22 | Tokimec Inc | Distribution type coupling filter |
| JP4588679B2 (en) * | 2006-08-31 | 2010-12-01 | 日本電信電話株式会社 | Filter device |
-
1986
- 1986-08-04 JP JP18293086A patent/JPH0720001B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6338301A (en) | 1988-02-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |