JPS58172001A - Dielectric filter - Google Patents
Dielectric filterInfo
- Publication number
- JPS58172001A JPS58172001A JP5439982A JP5439982A JPS58172001A JP S58172001 A JPS58172001 A JP S58172001A JP 5439982 A JP5439982 A JP 5439982A JP 5439982 A JP5439982 A JP 5439982A JP S58172001 A JPS58172001 A JP S58172001A
- Authority
- JP
- Japan
- Prior art keywords
- conductors
- filter
- resonator
- internal
- rectangular parallelepiped
- 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
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
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、マイクロ波用誘電体ろ波器に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dielectric filter for microwaves.
従来の誘電体ろ波器は、結合素子及び同調素子等を組込
九だ筐体内に誘電体を充てんして形成しているため誘電
体を均一に充てんすることが困難で、特性の一様なる波
器が得難く、その調整も複雑なため量産に不適であった
。Conventional dielectric filters incorporate coupling elements, tuning elements, etc., and are formed by filling a nine-sided housing with dielectric material, which makes it difficult to fill the dielectric material uniformly, resulting in uniform characteristics. It was difficult to obtain a suitable wave device, and its adjustment was complicated, making it unsuitable for mass production.
本発明は、構造製作が簡単容易で、任意かつ良好な特性
の得られるマイクロ波用誘電体ろ波器を実現することを
目的とする。An object of the present invention is to realize a dielectric filter for microwaves whose structure is simple and easy to manufacture, and which can obtain arbitrary and good characteristics.
第１図は、本発明の一実施例を示す外観斜視図、第２図
は、一部切欠部を有する組立図で、両図において、１は
断面形状が凹形の下部金属筐体、１′は１と同一形状寸
法の上部金属筐体、２及び２′は金属端板である。金属
端板２及び２′を下部及び上部金属筐体１及び１′と別
個に形成する代りに下部及び上部金属筐体の各両端に金
属端板を一体に取付けるようにしてもよい。３及び３′
は入出力同軸端子、４及び４′はその支持板、５・ｌ
ないしテ４及び５・１′すいシ５４′は例えばセラミッ
ク等の誘電体より成る直方体で、第３図に直方体５・１
の表面の展開図を示すように、下面６、端面７及び８の
各全域に斜線を以て示したように銀等の金属被膜を塗布
、焼付は又は蒸着等によって付着せしめ、側面９及び１
０．上面１１には各縁部にのみ金属被膜を付着せしめで
ある。直方体５・１′は第４図に表面の展開図を示すよ
うに、上面１１′、端面７′及び８′の各全域に金属被
膜を付着せしめ、側面９′及び１０′、下面６′の各縁
部にのみ金属被膜を、付着せしめである。FIG. 1 is an external perspective view showing an embodiment of the present invention, and FIG. 2 is an assembled view with a partially cut-out portion. ' is an upper metal casing having the same shape and dimensions as 1, and 2 and 2' are metal end plates. Instead of forming the metal end plates 2 and 2' separately from the lower and upper metal casings 1 and 1', the metal end plates may be integrally attached to both ends of the lower and upper metal casings. 3 and 3'
are input and output coaxial terminals, 4 and 4' are their support plates, 5.l
The rectangular parallelepipeds 54' and 54' are made of a dielectric material such as ceramic, and the rectangular parallelepipeds 54 and 54' are shown in FIG.
As shown in the developed view of the surface of , a metal film such as silver is coated on the lower surface 6, end surfaces 7 and 8 as indicated by diagonal lines, and is attached by baking or vapor deposition.
0. A metal coating is applied to the upper surface 11 only at each edge. As shown in the developed view of the surface of the rectangular parallelepiped 5/1' in FIG. The metal coating is applied only to each edge.
他の直方体５・２ないし５・４は５・１と同様で、直方
体５・２′ないし５・４′は５・１′と同様である。１
２はろ波器の内部素子を構成するＩりで、入出力結合ル
ープ１３及び１３′、共振器の内部導体１４・１ないし
＋４・４．股間結合阻止用接地導体１５・１ ないし＋
５・３、接地導体１６及び１６′を備え、入出力結合ル
ープ１３及び１３゛の各一端を入出力同軸端子３及び３
′の各内部導体に対応する個所に設け、各地端を接地導
体１６及び１６′に接続し、接地導体１６及び１６′を
直方体５−１ないし５４の各上面１１及び直方体５・１
′ないし５・４′の各下面６″の各縁部に設けた金属被
膜に対応する個所に設け、共振器の内部導体１４・１
ないし１４・４を直方体５・１ないし５−４の各上面Ｉ
Ｉ及び直方体５・１゛ないし５・４゛の各下面６′の各
中央部分（金属被膜を付着していない部分）に対応する
個所に設け、段間結合阻止用接地導体１５−１ ないし
１５・３を共振器の内部導体１４・１ないしＩ４・４の
各中間部に設けである。ろ波器の内部素子構成薄板＋２
は、例えばプリント基板の表面に銀等の金属を以て所要
のパターンをプリントするか、プリント基板の表面のプ
リントパターンに対応するパターンを裏面にもプリント
するか、又（１銅等の金属薄板を所要の）＜ターンに打
抜き、又はエツチング処理を施して形成する。The other rectangular parallelepipeds 5.2 to 5.4 are the same as 5.1, and the other rectangular parallelepipeds 5.2' to 5.4' are the same as 5.1'. 1
2 constitute internal elements of the filter, including input/output coupling loops 13 and 13', and internal conductors 14.1 to +4.4 of the resonator. Ground conductor for preventing groin coupling 15.1 or +
5, 3, ground conductors 16 and 16', and one end of each of the input/output coupling loops 13 and 13' is connected to the input/output coaxial terminals 3 and 3.
The ground conductors 16 and 16' are connected to the respective upper surfaces 11 of the rectangular parallelepipeds 5-1 to 54 and the rectangular parallelepipeds 5 and 1.
The inner conductors 14 and 1 of the resonator are provided at locations corresponding to the metal coatings provided on each edge of each lower surface 6'' of the resonator.
to 14.4 to each upper surface I of rectangular parallelepiped 5.1 to 5-4.
Grounding conductors 15-1 to 15 are provided at locations corresponding to the center portions (portions to which no metal coating is attached) of the lower surfaces 6' of the rectangular parallelepipeds 5.1 to 5.4.・3 is provided at each intermediate portion of the internal conductor 14.1 to I4.4 of the resonator. Filter internal element configuration thin plate +2
For example, you can print the required pattern on the front surface of the printed circuit board using metal such as silver, or print a pattern corresponding to the printed pattern on the front surface of the printed circuit board on the back surface, or (1) Formed by punching or etching the turns.
本発明ろ波器を組立てるに当っては、第２図に示すよう
に、下部金属筐体１内に誘電体より成る直方体５．１
ないし５・４の各下面６を下向きにして嵌入し、その上
面にろ波器の内部素子構成薄板１２を重ね、支持板４及
び４″を下部金属筐体１にねじ止めして入出力同軸端子
３及び３゛を取付け、入出力結合ループ１３及び１３′
の各一端を入出力同軸端子３及び３′の各内部導体に半
田付等により接続した後、ろ波器の内部素子構成薄板１
２の上に直方体５・１′ないし５４′の各下面６′を下
向きにしで載置し、その周りを上部金属筐体１′によっ
て覆い、下部及び上部金属筐体１及び１′をねじ止めに
より一体に結合し、支持板４及び４′を上部金属筐体１
′にねじ止めすると共に金属端板２及び２゛を下部及び
上部金属筐体１及び１゛にねじ止めにより一体に取付け
る。In assembling the filter of the present invention, as shown in FIG.
5 and 4 are inserted with their lower surfaces 6 facing downward, the filter's internal element constituent thin plates 12 are stacked on the upper surfaces, and the support plates 4 and 4'' are screwed to the lower metal casing 1 to connect the input and output coaxially. Attach terminals 3 and 3', input/output coupling loops 13 and 13'
After connecting one end of each to each internal conductor of the input/output coaxial terminals 3 and 3' by soldering etc., the thin plate 1 constituting the internal elements of the filter
Place the rectangular parallelepipeds 5, 1' to 54' on top of 2 with their lower surfaces 6' facing downward, cover the upper metal casing 1' with the upper metal casing 1', and screw the lower and upper metal casings 1 and 1' together. The supporting plates 4 and 4' are connected to the upper metal casing 1.
At the same time, the metal end plates 2 and 2' are integrally attached to the lower and upper metal casings 1 and 1' by screws.
このように構成した本発明ろ波器においては、誘電体よ
り成る直方体５・１ ないし５４及び５・１′ないし５
４′の各表面に付着せしめた金属被膜が外部導体となり
、ろ波器の内部素子構成薄板１２における内部導体１４
・１ ないし１４°４と共に各段の共振器を形成し、入
出力同軸端子３及び入出力結合ループ１３を介して導入
されたエネルギは各段の共振器を通り１人出力結合ルー
プ１３′及び入出力同軸端子３′を介して取出される。In the filter of the present invention constructed in this way, rectangular parallelepipeds 5.1 to 54 and 5.1' to 5 made of dielectric material are used.
The metal coating adhered to each surface of the filter 4' serves as an external conductor, and serves as an internal conductor 14 in the thin plate 12 that constitutes the internal elements of the filter.
・1 to 14 degrees 4 together form a resonator in each stage, and the energy introduced via the input/output coaxial terminal 3 and the input/output coupling loop 13 passes through the resonator in each stage to the output coupling loop 13' and the output coupling loop 13'. It is taken out via the input/output coaxial terminal 3'.
各共振器の共振周波数は内部導体＋４・１ ないし１４
・ｌの各長さに応じで定まり、第２図示のように内端を
屈曲して１字形に形成することにより、小形で内部導体
１４・１ ないし１４・４の有効長を大にして共振周波
数を但下せしめ得る。各共振器間の結合度は内部導体１
４・１ ないし１４・４の隣接間隔に応じて定まり、間
隔が広い程珠となつ、間隔が狭い程密となる。又、股間
結合阻止用接地導体１５・１ ないし１５・３の幅が広
い程共振器間の結合度が疎となって帯域幅が狭くなり、
接地導体１５・１ないし１５・３の幅が狭い程結合度が
密となって帯域幅が広くなる。The resonant frequency of each resonator is the inner conductor +4・1 to 14
・By bending the inner end to form a single shape as shown in the second diagram, the effective length of the internal conductors 14.1 to 14.4 can be enlarged and resonated. The frequency can be lowered. The degree of coupling between each resonator is 1
It is determined depending on the adjacent spacing of 4.1 to 14.4, and the wider the spacing, the more beads there will be, and the narrower the spacing, the denser they will be. Furthermore, the wider the width of the groin coupling blocking ground conductor 15.1 to 15.3, the looser the coupling between the resonators and the narrower the bandwidth.
The narrower the width of the ground conductors 15.1 to 15.3, the denser the coupling and the wider the bandwidth.
股間結合阻止用接地導体１５・１ないし管５・３を省い
ても本発明を実施することが出来るが、段間結合阻止用
接地導体を設けた場合と同じ帯域幅を得るには共振器の
隣接間隔を大にして結合度を疎ならしめる必要があるた
め、ろ波器全体が大形となるを免れ得ない。The present invention can be carried out even if the crotch coupling blocking grounding conductor 15.1 or pipe 5.3 is omitted, but in order to obtain the same bandwidth as when the interstage coupling blocking grounding conductor is provided, the resonator must be Since it is necessary to make the degree of coupling sparse by increasing the spacing between adjacent filters, the entire filter inevitably becomes large in size.
次に、入出力結合ループ１３及び１３′と共振器間・
の結合度は、入出力結合ループの面積が広い程密とな
り、ループと共振器との間隔（第２図ａ）が大なる程疎
となる。Next, between the input/output coupling loops 13 and 13' and the resonator,
The degree of coupling becomes denser as the area of the input/output coupling loop becomes wider, and becomes sparser as the distance between the loop and the resonator (FIG. 2a) becomes larger.
以上は４段の共振器を縦続接続した場合を例示したが、
共振器の段数は適宜増減することが可能で、又、以上は
誘電体誹り成る４個の直方体５・１ないし５・４を一列
に並べて下部直方体群を形成すると共に４個の直方体５
・１′ないし５・４′を一列に並べて上部直方体群を形
成した場合を例示したが、４個の直方体５・場ないし５
・４を一体に形成すると共に５・１′ないし５−４′を
一体に形成し、各表面に所要の金属被膜ケ付看せしめる
よう（こしてもよい。The above example shows the case where four stages of resonators are connected in cascade, but
The number of resonator stages can be increased or decreased as appropriate, and in the above example, four rectangular parallelepipeds 5.1 to 5.4 made of dielectric material are arranged in a row to form a lower rectangular parallelepiped group, and four rectangular parallelepipeds 5 are arranged in a row.
・The case where the upper rectangular parallelepiped group is formed by arranging 1' to 5 and 4' in a row is illustrated, but four rectangular parallelepipeds 5
- 4 and 5/1' to 5-4' are integrally formed, and each surface is coated with the required metal coating (it may be rubbed).
更に、以上はろ波器の内部素子構成薄板１２における共
振器の内部導体１４・１ ないし１４４の向きを順次逆
向きにしてインクディジタル形の帯域通過ろ波器を構成
した場合を例示したが、内部導体１４・１ないし１４・
４の向きをそろえることによりｒ）コムライン形の帯域
通過ろ波器を構成することが出来る。Further, in the above example, the internal conductors 14.1 to 144 of the resonator in the internal element constituent thin plate 12 of the filter are sequentially reversed to form an ink-digital bandpass filter. Conductor 14.1 to 14.
By aligning the directions of 4, a combline type bandpass filter can be constructed.
ろ波器の内部素子構成薄板１２のパターンを適当ならし
めることにより任意特性のる波器を構成することが出来
る。薄板１２のノ曵ターンを例えば第５図（イ）に平面
図を示すように形成することにより、（ロ）図に等価口
路を示すような５段の低域通過ろ波器を構成することが
出来る。第５図（イ）において、１４・１及び１４・２
は共振器の内Ｍ４体、１６及び１６″は接地導体、１７
はプリント基板、１８は信号伝送用導体で、この信号伝
送用導体１８の端部を第１図及び第２図に示した入出力
同軸端子３及び３′の各内部導体に接続する。尚、第５
図（イ）において斜線を施した部分は金属被膜を付着せ
しめた個所を示す。又、薄板１２のノ（ターンを例えば
第６図（イ）のように構成すること（二より、 （ロ）
図に等価回路を示すような５段の高域通過ろ波器を構成
することが出来る。第６図（イ）において：ビは信号伝
送用導体で、他の符号は第５図（イ）と同様である。第
７図は、１設の帯域阻止ろ波器を構成せしめるための肩
板１２のパターンの一例を示す図（イ図）及びその等価
回路図（０図）で、符号は第５図と同様である。By suitably patterning the thin plate 12 that constitutes the internal elements of the filter, a filter having arbitrary characteristics can be constructed. By forming the round turns of the thin plate 12, for example, as shown in the plan view in FIG. 5(a), a five-stage low-pass filter as shown in FIG. I can do it. In Figure 5 (a), 14.1 and 14.2
is M4 body of the resonator, 16 and 16'' are ground conductors, 17
1 is a printed circuit board; 18 is a signal transmission conductor; the ends of the signal transmission conductor 18 are connected to the internal conductors of the input/output coaxial terminals 3 and 3' shown in FIGS. 1 and 2; Furthermore, the fifth
In Figure (A), the shaded areas indicate the areas to which the metal coating was attached. Also, the turns of the thin plate 12 may be configured as shown in FIG. 6 (A) (Secondly, (B)
It is possible to construct a five-stage high-pass filter as shown in the equivalent circuit shown in the figure. In FIG. 6(A): B is a signal transmission conductor, and other symbols are the same as in FIG. 5(A). Fig. 7 is a diagram (Fig. A) showing an example of the pattern of the shoulder plate 12 for constructing one band-elimination filter and its equivalent circuit diagram (Fig. 0), and the reference numerals are the same as in Fig. 5. It is.
以上何れの実施例においても初段及び終般共振器と入出
力端子とを結合するに当って、ループ結合、タンプ結合
又は容量結合等の中、任意の結合手段を用い得ること勿
論である。In any of the above embodiments, any coupling means such as loop coupling, tamp coupling, capacitive coupling, etc. can be used to couple the initial stage and final resonators to the input/output terminals.
本発明ろ波器においては、ろ波器の内部素子構成薄板１
２のパターンを変更することにより任意所要の特性をも
たせることが出来、又、薄板１２を製作するに当っては
プリント基板へのプリント技術、金属薄板の打抜き或は
エツチング処理技術を利用し得るので、特性のばらつき
が極めて少なく、かつ特性の良好なる波器の量産が可能
で、更に薄板１２のパターン変更に応じて誘電体より成
る直方体５・Ｉないし５・４及び５・１′ないし５・４
′の数を増減することによりろ波器の段数を変え得るか
らこの点からも本発明ろ波器の製作は極めて容易である
。又、直方体を誘電率の高い材質を以て形成することに
より、ろ波器全体を小形化し得る等の特長１有する。In the filter of the present invention, the internal element constituent thin plate 1 of the filter is
By changing the pattern 2, any desired characteristics can be imparted, and in manufacturing the thin plate 12, printing technology for printed circuit boards, punching or etching processing technology for thin metal plates can be used. , it is possible to mass-produce wave devices with very little variation in characteristics and good characteristics, and furthermore, according to the pattern change of the thin plate 12, the dielectric rectangular parallelepipeds 5.I to 5.4 and 5.1' to 5. 4
The number of stages of the filter can be changed by increasing or decreasing the number of ', and from this point of view as well, the filter of the present invention can be manufactured very easily. Further, by forming the rectangular parallelepiped using a material with a high dielectric constant, the filter has the advantage of being able to downsize the entire filter.
第１図は、本発明の一実施例を示す外観図、第２図は、
その組立図、第３図及び第４図は、要部素子の表面展開
図、第５図ないし第７図は、本発明の他の実施例におけ
る要部素子の平面図及び等価回路図で、１：下部金属筐
体、１゛：上部金属筐体、２及び２′二金属喘板、３及
び３′：入出力同軸端子、４及び４′：支持板、５・１
ないし５・４及び５・１′ないし５−４’ ： ｇ％電
体より成る直方体、６及び６′：直方体の下面、７．８
．７’及び８′：直方体の端面、９．１０．９’及ヒＩ
Ｑ’：直方体の側面、１１及ヒ１１゛：直方体の上面、
１２：ろ波器の内部素子構成薄板、共振器の内部導体、
１５・１ないし＋５−３：段開結合明止接地導体、１６
及び１６′：接地導体、１７：プリント基板、１８及び
１８′：信号伝送用導体である。
（イ）
第
Ｃイ）
５図
１口）
（σ）FIG. 1 is an external view showing one embodiment of the present invention, and FIG. 2 is a
The assembled drawings, FIGS. 3 and 4 are surface development views of the essential elements, and FIGS. 5 to 7 are plan views and equivalent circuit diagrams of the essential elements in other embodiments of the present invention. 1: Lower metal casing, 1゛: Upper metal casing, 2 and 2' two metal pane plates, 3 and 3': input/output coaxial terminals, 4 and 4': support plate, 5.1
to 5.4 and 5.1' to 5-4': rectangular parallelepiped made of g% electric material, 6 and 6': lower surface of rectangular parallelepiped, 7.8
．． 7' and 8': end faces of rectangular parallelepiped, 9.10.9' and hI
Q': Side surface of the rectangular parallelepiped, 11 and H11゛: Top surface of the rectangular parallelepiped,
12: Internal element constituent thin plate of filter, internal conductor of resonator,
15・1 or +5-3: Stage open coupling clear ground conductor, 16
and 16': ground conductor, 17: printed circuit board, and 18 and 18': signal transmission conductor. (a) Part C a) Figure 5 1 entry) (σ)
Claims (4)
被膜を付着せしめた誘電体より成る直方体を複数個配列
した下部直方体群と、−組の入出力結合素子、複数個の
共振器内部導体及び股間結合阻止用接地導体を備えたる
波器の内部素子構成薄板と、前記下部直方体群と同一構
成で前記ろ波器の内部素子構成薄板を介して前記下部直
方体群に対向密着せしめた上部直方体群とより成ること
を特徴とする誘電体ろ波器。(1) A lower rectangular parallelepiped group in which a plurality of rectangular parallelepipeds made of a dielectric material coated with a metal film are arranged to form a part of the surface of the outer conductor of the resonator, a set of input/output coupling elements, and a plurality of resonators. An internal element constituent thin plate of the wave filter, which is provided with an internal conductor and a ground conductor for preventing crotch coupling, has the same configuration as the lower rectangular parallelepiped group, and is brought into close contact with the lower rectangular parallelepiped group through the internal element constituent thin plate of the filter. A dielectric filter comprising a group of upper rectangular parallelepipeds.
の直方体をこれらの総合形状体積に等しい形状体積を有
すると共に表面の一部に共振器の外部導体を形成する金
属被膜を付着せしめた一部゛の誘電体直方体を以て置換
した特許請求の範囲第１項記載の誘電体ろ波器。(2) A plurality of rectangular parallelepipeds constituting the lower rectangular parallelepiped group and the upper rectangular parallelepiped group have a shape volume equal to the total shape volume of these rectangular parallelepipeds, and a metal coating that forms the external conductor of the resonator is attached to a part of the surface. A dielectric filter according to claim 1, wherein the dielectric filter is replaced with a dielectric rectangular parallelepiped.
にプリントパターンより成る一組の入出力結合素子、複
数個の共振器内部導体及び段間結合阻止用接地導体を設
けて形成した薄板より成る特許請求の範囲第１項記載の
誘電体ろ波器。(3) Internal element structure of the filter The thin plate is formed by providing a set of input/output coupling elements made of a printed pattern on the surface of a printed circuit board, a plurality of resonator internal conductors, and a ground conductor for blocking interstage coupling. A dielectric filter according to claim 1, comprising:
抜き、又はエツチング処理によって一組の入出力結合素
子、複数個の共振器内部導体及び段間結合阻止用接地導
体を形成した薄板より成るβσ第４項のいずれかに記載
の誘電体ろ波器。(4) A set of input/output coupling elements, a plurality of resonator internal conductors, and a grounding conductor for interstage coupling prevention are formed by punching or etching a thin metal plate that constitutes the internal elements of the filter. The dielectric filter according to any one of item 4, βσ, which is made of a thin plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5439982A JPS58172001A (en) | 1982-04-01 | 1982-04-01 | Dielectric filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5439982A JPS58172001A (en) | 1982-04-01 | 1982-04-01 | Dielectric filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58172001A true JPS58172001A (en) | 1983-10-08 |
Family
ID=12969604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5439982A Pending JPS58172001A (en) | 1982-04-01 | 1982-04-01 | Dielectric filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58172001A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5025235A (en) * | 1989-02-09 | 1991-06-18 | Com Dev Ltd. | Microstripline interdigital planar filter |
| US5680080A (en) * | 1994-12-26 | 1997-10-21 | Murata Manufacturing Co., Ltd. | Dielectric resonator device with openings covered by printed circuit boards and conductive plates contacting the printed circuit boards |
| EP3220473A1 (en) * | 2016-03-14 | 2017-09-20 | Kathrein Werke KG | Coaxial filter in frame construction |
-
1982
- 1982-04-01 JP JP5439982A patent/JPS58172001A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5025235A (en) * | 1989-02-09 | 1991-06-18 | Com Dev Ltd. | Microstripline interdigital planar filter |
| US5680080A (en) * | 1994-12-26 | 1997-10-21 | Murata Manufacturing Co., Ltd. | Dielectric resonator device with openings covered by printed circuit boards and conductive plates contacting the printed circuit boards |
| EP3220473A1 (en) * | 2016-03-14 | 2017-09-20 | Kathrein Werke KG | Coaxial filter in frame construction |
| US10347958B2 (en) | 2016-03-14 | 2019-07-09 | Kathrein Se | Coaxial filter having a frame construction and a conductive separating web, where internal resonators can be galvanically connected to either the frame construction or the separating web |
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