JPS632404A - Method for adjusting band of dielectric filter - Google Patents
Method for adjusting band of dielectric filterInfo
- Publication number
- JPS632404A JPS632404A JP14474886A JP14474886A JPS632404A JP S632404 A JPS632404 A JP S632404A JP 14474886 A JP14474886 A JP 14474886A JP 14474886 A JP14474886 A JP 14474886A JP S632404 A JPS632404 A JP S632404A
- Authority
- JP
- Japan
- Prior art keywords
- diode
- coupling
- dielectric
- thick
- voltage
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 5
- 238000010168 coupling process Methods 0.000 claims abstract description 18
- 238000005859 coupling reaction Methods 0.000 claims abstract description 17
- 239000003990 capacitor Substances 0.000 claims abstract description 16
- 230000008878 coupling Effects 0.000 claims abstract description 14
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明はマイクロ波帯などに使用されるセラミック誘電
体使用の誘電帯同軸共振器を使用した帯域濾波器の帯域
幅の調整方法仏間するもので、帯域幅の調整を逆電圧を
与えた容量値がごく小さい高周波用高速スイッチングダ
イオードに加える直流電圧の調整によって行うので、操
作が簡単で小形かつ安価に構成できることが特徴である
。[Detailed Description of the Invention] (Field of Industrial Application) The present invention is directed to a method for adjusting the bandwidth of a bandpass filter using a dielectric band coaxial resonator using a ceramic dielectric, which is used in the microwave band, etc. Since the bandwidth is adjusted by adjusting the DC voltage applied to a high-frequency high-speed switching diode with a very small capacitance to which a reverse voltage is applied, it is easy to operate, compact, and inexpensive.
(従来の技術)
従来は誘電体共振器をいくつか並べてそれらを適当に結
合させて、必要な帯域通過特性の濾波器(以下BPFと
記す)を得ていた。この共振器結合の方法にはM結合や
C結合が用いられる。第3図はその一例の回路図で、こ
のようにC結合(静4結合)を使用した場合、マイクロ
波帯ではこの結合容量C8は0.3 pF前後で十分に
なってくる。(Prior Art) Conventionally, a filter (hereinafter referred to as BPF) with necessary band-pass characteristics was obtained by arranging several dielectric resonators and appropriately coupling them. M-coupling and C-coupling are used for this resonator coupling method. FIG. 3 is a circuit diagram of an example. When C coupling (static four-coupling) is used in this way, the coupling capacitance C8 of around 0.3 pF is sufficient in the microwave band.
なお第3図において1と2は誘電体共振器である。Note that in FIG. 3, 1 and 2 are dielectric resonators.
が使用されているが、その容量値の微調整を行いたい場
合(叫よ、複数の固定コンデンサを直列や並列に接続し
た(j、または小形の可変容量コンデンサを固定コンデ
ンサと直列または並列(=接続して微調整を努力して行
っていた。is used, but if you want to fine-tune its capacitance value (shout out, connect multiple fixed capacitors in series or parallel (j), or connect a small variable capacitor in series or parallel with a fixed capacitor (= I was trying to connect it and make some fine adjustments.
しかしBPFの外形寸法もコンデンサの容量値も小さく
なってくると、小形可変コンデンサ自体もBPFの寸法
に比べて大形につき、かつ高価なものになってしまう。However, as the external dimensions of the BPF and the capacitance value of the capacitor become smaller, the small variable capacitor itself becomes larger and more expensive than the BPF.
さらにl pF以下の容量の可変コンデンサはほとんど
市販されていない。そこで従来はこの問題を解決するた
め、厚膜コンデンサに対しては膜のトリミングを行い、
チップコンデンサに対しては複数個を直列に接続して必
要な容量値を得る手段が用いられているが、1 pF以
下の容量の変更調整は非常に厄介であった。Furthermore, variable capacitors with a capacitance of 1 pF or less are hardly commercially available. Conventionally, in order to solve this problem, thick film capacitors were trimmed.
For chip capacitors, a method is used in which a plurality of chip capacitors are connected in series to obtain the required capacitance value, but changing and adjusting the capacitance of 1 pF or less is extremely troublesome.
たもので量産(=も適する。本発明方法の採用によって
結合容量の調整(−熟練を必要とせず、可変素子が機械
的構造を持っていないため、衝撃に対して強いことが期
待できる。It is also suitable for mass production (= is also suitable.) By adopting the method of the present invention, it is possible to adjust the coupling capacitance (-) without requiring any skill, and because the variable element does not have a mechanical structure, it can be expected to be resistant to impact.
(発明の構成と作用)
第1図は本発明を実施した誘電体フィルタの構成例を示
す等価回路で、第2図は第1図のフィルタの斜視図(5
)と上面図(Blおよび誘電体共振子の斜視図(qとそ
の等価回路(D)である。これらの図において1と2は
誘電体共振素子であって、3AID、長の同軸共振器を
構成し、図(qに斜線で示した外周面、底面および内周
面を銀または銅めっきした金属導体で囲んだものである
。3はハイブリッド集積回路(Ic3で、これには”t
、 C□、Dが搭載されている。このうちC工は厚膜
コンデンサで、R1用電極と1の端子間の空隙を利用し
0.3 pFをねらって作られている。vDoは直流電
圧印加用端子に加える直流電圧、第2図(B)の4は”
DC印加用ランド、R1は厚膜抵抗、Dはダイオード(
チップ、ミニモールド形光あるが、このダイオードは端
子間容量がごく小さい高周波小信号高速スイッチング用
のものを用い、厚膜抵抗R1を通して逆電圧または逆バ
イアス電圧(Ov〜15V)を加えることができる。こ
の逆電圧によってDの等価容量は非常(:小さく、逆電
圧を変化させれば約2倍(1pF’−2pF )変化す
る。また厚膜抵抗比□は高インピーダンスであるため、
直流逆電圧をダイオードのカソードに高抵抗R1を通し
て印加するので、印加するための配線は長くしてもBP
Fの特性にはほとんど影響を与えない。(Structure and operation of the invention) FIG. 1 is an equivalent circuit showing an example of the structure of a dielectric filter embodying the present invention, and FIG. 2 is a perspective view of the filter shown in FIG.
), a top view (Bl), a perspective view (q) of the dielectric resonator, and its equivalent circuit (D). In these figures, 1 and 2 are dielectric resonant elements, and a coaxial resonator with a length of 3 AID 3 is a hybrid integrated circuit (Ic3, which includes a
, C□, and D are installed. Among these, C type is a thick film capacitor, which is made using the gap between the R1 electrode and the 1 terminal to aim for 0.3 pF. vDo is the DC voltage applied to the DC voltage application terminal, and 4 in Figure 2 (B) is "
Land for DC application, R1 is a thick film resistor, D is a diode (
There are chip and mini-mold type optics, but this diode is for high-frequency, small-signal, high-speed switching with extremely small capacitance between terminals, and a reverse voltage or reverse bias voltage (Ov ~ 15V) can be applied through the thick film resistor R1. . Due to this reverse voltage, the equivalent capacitance of D is very small, and if the reverse voltage is changed, it will change by about twice (1pF'-2pF).Also, since the thick film resistance ratio □ is high impedance,
Since the DC reverse voltage is applied to the cathode of the diode through the high resistance R1, even if the wiring for application is long, the BP
It has almost no effect on the characteristics of F.
以上の特性を利用して誘電体共振素子間の結合容量値を
変化させれば、BPFの帯域特性、特C二帯域幅を微細
(=調整可能(帯域幅の変化率は結合容量の変化率に対
応する)であり、結合容量値の変化はダイオード(=印
加する直流逆電圧の変化(−よって行えるので、BPF
の外部から調整できるという利点がある。By changing the coupling capacitance value between dielectric resonant elements using the above characteristics, it is possible to finely adjust the BPF band characteristics and the special C2 bandwidth (the rate of change in the bandwidth is the rate of change in the coupling capacitance). (corresponds to
It has the advantage that it can be adjusted from outside.
(発明の効果)
本発明じよれば、0.5 pF以下(=もなる結合容量
値を、逆にバイアスダイオードと共に剤いてバイアス用
外部電圧の変化で結合容量値を大幅に変化させることが
できる。また安価なダイオードで高価なマイクロ波用な
どの可変コンデンサの代りをさせることが可能であり、
厚膜IC化も容易である。(Effects of the Invention) According to the present invention, it is possible to significantly change the coupling capacitance value of 0.5 pF or less by changing the external voltage for bias by using a bias diode together with the coupling capacitance value. It is also possible to use an inexpensive diode in place of an expensive variable capacitor for microwaves, etc.
It is also easy to make a thick film IC.
なお−船釣(=実際の結合容量は、計算値の土5%程度
におさめる必要がある。Note that the actual binding capacity must be kept at about 5% of the calculated value.
第1図は本発明を実施した誘電体フィルターの一例の等
価回路図、第2図は第1図のフィルターの斜視図四と、
上面回器と、誘電体共振子の斜視図(qおよびその等価
回路CD+、第3図は従来のC結合誘電体共振子C二よ
る帯域濾波器である。
1.2・・・・誘電体共振子、
3・・・・ハイブリッドIC回路、
4・・・・直流電圧印加用ランド(1and、端子領域
)。FIG. 1 is an equivalent circuit diagram of an example of a dielectric filter embodying the present invention, and FIG. 2 is a perspective view 4 of the filter of FIG.
A perspective view of a top surface resonator and a dielectric resonator (q and its equivalent circuit CD+, Fig. 3 is a bandpass filter using a conventional C-coupled dielectric resonator C2. 1.2... Dielectric Resonator, 3...Hybrid IC circuit, 4... Land for DC voltage application (1and, terminal area).
Claims (1)
構成した誘電体帯域濾波器において、前記結合用コンデ
ンサを1pF以下の設定容量値を有する厚膜コンデンサ
と、これに直列に接続され逆バイアス電圧用直流電圧を
、高抵抗を通じて与えられる高周波用高速スイッチング
ダイオードにて構成し、前記逆バイアス直流電圧を変化
させることによって実効結合容量値を調整して、前記誘
電体帯域濾波器の帯域幅の微細調整を行うことを特徴と
する誘電体フィルタの帯域幅調整方法。In a dielectric bandpass filter configured by coupling a dielectric resonator with a small capacitance capacitor, the coupling capacitor is connected in series with a thick film capacitor having a set capacitance value of 1 pF or less and is reverse biased. The DC voltage for voltage is configured by a high-speed switching diode for high frequency applied through a high resistance, and the effective coupling capacitance value is adjusted by changing the reverse bias DC voltage, and the bandwidth of the dielectric bandpass filter is adjusted. A dielectric filter bandwidth adjustment method characterized by fine adjustment.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14474886A JPS632404A (en) | 1986-06-23 | 1986-06-23 | Method for adjusting band of dielectric filter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14474886A JPS632404A (en) | 1986-06-23 | 1986-06-23 | Method for adjusting band of dielectric filter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS632404A true JPS632404A (en) | 1988-01-07 |
Family
ID=15369451
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14474886A Pending JPS632404A (en) | 1986-06-23 | 1986-06-23 | Method for adjusting band of dielectric filter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS632404A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0548365A (en) * | 1991-08-21 | 1993-02-26 | Murata Mfg Co Ltd | Pole adjustment method for lamination chip lc filter |
KR100435511B1 (en) * | 2002-03-07 | 2004-06-10 | 한국화학연구원 | The synthetic method of guanidyl polymers |
EP1521363A1 (en) * | 2003-10-03 | 2005-04-06 | St Microelectronics S.A. | Integrated Coupler |
JP2007267344A (en) * | 2006-02-28 | 2007-10-11 | Saito Kiyouchiyou Tokushu Kiki Kk | Polar band-reject filter |
CN109755699A (en) * | 2019-02-25 | 2019-05-14 | 南通大学 | Switchable difference filter based on bimodulus dielectric resonator |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5651648A (en) * | 1979-10-02 | 1981-05-09 | Fruengel Frank | View measuring device |
-
1986
- 1986-06-23 JP JP14474886A patent/JPS632404A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5651648A (en) * | 1979-10-02 | 1981-05-09 | Fruengel Frank | View measuring device |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0548365A (en) * | 1991-08-21 | 1993-02-26 | Murata Mfg Co Ltd | Pole adjustment method for lamination chip lc filter |
KR100435511B1 (en) * | 2002-03-07 | 2004-06-10 | 한국화학연구원 | The synthetic method of guanidyl polymers |
EP1521363A1 (en) * | 2003-10-03 | 2005-04-06 | St Microelectronics S.A. | Integrated Coupler |
US7375603B2 (en) | 2003-10-03 | 2008-05-20 | Stmicroelectronics S.A. | Integrated coupler |
US7760155B2 (en) | 2003-10-03 | 2010-07-20 | Stmicroelectronics S.A. | Integrated coupler |
JP2007267344A (en) * | 2006-02-28 | 2007-10-11 | Saito Kiyouchiyou Tokushu Kiki Kk | Polar band-reject filter |
CN109755699A (en) * | 2019-02-25 | 2019-05-14 | 南通大学 | Switchable difference filter based on bimodulus dielectric resonator |
CN109755699B (en) * | 2019-02-25 | 2020-07-03 | 南通大学 | Switchable differential filter based on dual-mode dielectric resonator |
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