JPH0787281B2 - Interdigital filter - Google Patents
Interdigital filterInfo
- Publication number
- JPH0787281B2 JPH0787281B2 JP1326231A JP32623189A JPH0787281B2 JP H0787281 B2 JPH0787281 B2 JP H0787281B2 JP 1326231 A JP1326231 A JP 1326231A JP 32623189 A JP32623189 A JP 32623189A JP H0787281 B2 JPH0787281 B2 JP H0787281B2
- Authority
- JP
- Japan
- Prior art keywords
- conductor
- inner conductors
- dielectric blocks
- conductors
- short
- 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
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] この発明は、主としてVHF帯、UHF帯、およびマイクロ波
帯で用いられるインターディジタル形ろ波器に関するも
のである。The present invention relates to an interdigital filter used mainly in the VHF band, UHF band, and microwave band.
[従来の技術] 従来、この種のろ波器として、第5図に示すようなもの
があった。この第5(a)図はG.Matthaei他,“MICROW
AVE FILTERS,IMPEDANCE−MATCHING NETWORKS,AND COUPL
ING STRUCTURES,"PP.614−626,1964,McGraw−Hill.に示
されたもので、図において(1)〜(5)は内導体、
(6)は外導体、(7),(8)は同軸端子、(9),
(10)はそれぞれ同軸端子(7),(8)の中心導体で
ある。第5(b)図は第5(a)図のB−B断面であ
り、(1)〜(6)は第5(a)図と同じものである。
内導体(2),(3),(4)は一端が短絡端,他端が
開放端となっており、短絡端側で支持されている。[Prior Art] Conventionally, as a filter of this type, there has been one as shown in FIG. This Figure 5 (a) is from G. Matthaei et al., “MICROW
AVE FILTERS, IMPEDANCE-MATCHING NETWORKS, AND COUPL
ING STRUCTURES, "PP. 614-626, 1964, McGraw-Hill. In the figure, (1) to (5) are inner conductors,
(6) is an outer conductor, (7) and (8) are coaxial terminals, (9),
(10) are the center conductors of the coaxial terminals (7) and (8), respectively. FIG. 5 (b) is a BB cross section of FIG. 5 (a), and (1) to (6) are the same as FIG. 5 (a).
One end of each of the inner conductors (2), (3), and (4) is a short-circuit end, and the other end is an open end, which are supported on the short-circuit end side.
このインターディジタル形ろ波器において内導体
(2),(3),(4)が同一周波数f0で共振するもの
とすれば、周波数f0では内導体(1)と(5)は共振状
態にある内導体(2),(3),(4)を介して強く結
合し、同軸端子(7)への入射波は端子(8)へ導かれ
る。しかし、f0以外の周波数では、内導体(1)〜
(5)の結合は非常に弱く、同軸端子(7)への入射波
はほとんどの電力が反射される。このように、第5
(a)図に示したインターディジタル形ろ波器は、帯域
通過ろ波器としての機能を有する。Inner conductor in the interdigital wave filter (2), (3), if (4) is intended to resonate at the same frequency f 0, the inner conductor at the frequency f 0 (1) and (5) the resonance conditions Strongly coupled through the inner conductors (2), (3), and (4) in (3), the incident wave to the coaxial terminal (7) is guided to the terminal (8). However, at frequencies other than f 0 , the inner conductor (1) ~
The coupling of (5) is very weak, and most of the power of the incident wave on the coaxial terminal (7) is reflected. Thus, the fifth
The interdigital filter shown in (a) has a function as a bandpass filter.
[発明が解決しようとする課題] 従来のインターディジタル形ろ波器は以上のように構成
されているので、内導体(2),(3),(4)の開放
端側が支持されない構造であるため、振動等に対して機
械的に不安定であるという問題点があった。また、内導
体(2),(3),(4)は少なくとも共振する波の略
1/4波長の長さが必要なためUHF帯等、比較的低い周波数
で用いる場合、内導体(2),(3),(4)が長くな
りフィルタが大きくなるという問題点があった。[Problems to be Solved by the Invention] Since the conventional interdigital filter is configured as described above, the inner conductors (2), (3) and (4) are not supported on the open end side. Therefore, there is a problem in that it is mechanically unstable against vibration and the like. In addition, the inner conductors (2), (3), (4) are at least approximately the resonating waves.
Since a length of 1/4 wavelength is required, when used at a relatively low frequency such as the UHF band, there is a problem that the inner conductors (2), (3), (4) become long and the filter becomes large.
この発明は上記のような問題点を解決するためになされ
たもので、振動等に対して機械的に安定であるとともに
加工が容易であり、かつ、小形なインターディジタル形
ろ波器を得ることを目的とする。The present invention has been made to solve the above problems, and provides a small interdigital filter which is mechanically stable against vibrations and the like and is easy to process. With the goal.
[課題を解決するための手段] この発明に係るインターディジタル形ろ波器は、2つの
直方体形状の誘電体ブロックそれぞれの表面に一側面か
らこの側面と対向する他の側面まで上記表面に平行に設
けられた複数の溝と、上記2つの誘電体ブロックのそれ
ぞれの底面および上記溝に平行な2つの側面に導体膜を
密着して外導体を形成し、上記溝の内壁に導体膜を密着
して複数の内導体を形成し、この複数の内導体と上記底
面の外導体とを交互に逆側の一端で導体膜の短絡部によ
り短絡し、上記2つの誘電体ブロックを、それぞれの上
記複数の溝を設けた表面が対向するように密着し、上記
密着した面に対して上記誘電体ブロックが対称となるよ
うに組み合わせ、かつ、対向する上記内導体により形成
される複数の貫通孔内に接着性導体を充填したものであ
る。[Means for Solving the Problems] The interdigital filter according to the present invention is arranged such that two side surfaces of each of the rectangular parallelepiped dielectric blocks are parallel to the surface from one side surface to the other side surface facing the side surface. An outer conductor is formed by adhering a conductor film to the plurality of grooves provided, the bottom surface of each of the two dielectric blocks and two side surfaces parallel to the groove to form an outer conductor, and the conductor film is adhered to the inner wall of the groove. A plurality of inner conductors are formed, and the plurality of inner conductors and the outer conductor on the bottom surface are alternately short-circuited at one end on the opposite side by the short-circuit portion of the conductor film, and the two dielectric blocks are respectively connected to the plurality of the inner conductors. The surfaces provided with the grooves are closely contacted so as to face each other, and the dielectric blocks are combined so as to be symmetrical with respect to the closely contacted surface, and the plurality of through holes are formed by the inner conductors that face each other. Fill with adhesive conductor It was done.
[作用] この発明においては、2つの直方体形状の誘電体ブロッ
クそれぞれの表面に複数の溝を設け、この溝の内壁に導
体膜を密着して複数の内導体を形成し、上記2つの誘電
体ブロックを、それぞれの上記複数の溝を設けた表面が
対向しこの表面に対して上記誘電体ブロックが対称とな
るように密着し、対向する上記内導体により形成される
複数の貫通孔内に接着性導体を充填したので、内導体は
振動等に対して機械的に安定に支持され、加工が容易と
なり、かつ、誘電体の波長短縮の効果により内導体長が
短くなる。また、上記貫通孔のそれぞれにおける2つの
上記内導体は同電位となり、不要モードの発生が抑制さ
れる。[Operation] In the present invention, a plurality of grooves are provided on the surface of each of the two rectangular parallelepiped dielectric blocks, and a plurality of inner conductors are formed by closely adhering a conductor film to the inner walls of the grooves. The blocks are closely adhered so that the surfaces provided with the plurality of grooves face each other and the dielectric blocks are symmetrical with respect to the surface, and are bonded in the plurality of through holes formed by the inner conductors that face each other. Since the inner conductor is filled, the inner conductor is mechanically and stably supported against vibrations and the like, is easy to process, and the length of the inner conductor is shortened by the effect of shortening the wavelength of the dielectric. Further, the two inner conductors in each of the through holes have the same potential, and the generation of unnecessary modes is suppressed.
[実施例] 第1図〜第3図はこの発明の一実施例を示す構成図であ
り、第1図は一部欠載の構造図、第2図は第1図のAA断
面図、第3図は第1図のBB断面図である。図において
(1a)〜(5a),(1b)〜(5b)は内導体、(6a),
(6b)は外導体、(7a)〜(11a),(7b)〜(11b)は
溝、(12a),(12b)は誘電体ブロック、(13)〜(1
7)は短絡部、(18)は例えば半田あるいはエポキシ系
導電性接着剤等の接着性導体、(19)は内導体(1a),
(1b)と外導体(6a),(6b)と接着性導体(18)とか
ら構成されるトリプレート線路、(20)は内導体(2
a),(2b)と外導体(6a),(6b)と接着性導体(1
8)とから構成されるトリプレート線路、(21)は内導
体(3a),(3b)と外導体(6a),(6b)と接着性導体
(18)とから構成されるトリプレート線路、(22)は内
導体(4a),(4b)と外導体(6a),(6b)と接着性導
体(18)とから構成されるトリプレート線路、(23)は
内導体(5a),(5b)と外導体(6a),(6b)と接着性
導体(18)とから構成されるトリプレート線路、(24)
はコネクタ板、(25)は内導体(1a),(1b)から構成
される貫通孔、(26)は内導体(2a),(2b)から構成
される貫通孔、(27)は内導体(3a),(3bb)から構
成される貫通孔、(28)は内導体(4a),(4b)から構
成される貫通孔、(29)は内導体(5a),(5b)から構
成される貫通孔、P1,P2は入出力端子である。[Embodiment] FIGS. 1 to 3 are configuration diagrams showing an embodiment of the present invention. FIG. 1 is a partially omitted structural view, FIG. 2 is a sectional view taken along line AA of FIG. FIG. 3 is a sectional view taken along line BB of FIG. In the figure, (1a) to (5a), (1b) to (5b) are inner conductors, (6a),
(6b) is an outer conductor, (7a) to (11a), (7b) to (11b) are grooves, (12a) and (12b) are dielectric blocks, and (13) to (1
7) is a short circuit part, (18) is an adhesive conductor such as solder or epoxy conductive adhesive, (19) is an inner conductor (1a),
A triplate line composed of (1b) and outer conductor (6a), (6b) and adhesive conductor (18), and (20) the inner conductor (2
a), (2b) and outer conductor (6a), (6b) and adhesive conductor (1
8) and a triplate line composed of (21), an inner conductor (3a), (3b), an outer conductor (6a), (6b) and an adhesive conductor (18), (22) is a triplate line composed of inner conductors (4a), (4b), outer conductor (6a), (6b) and adhesive conductor (18), and (23) is an inner conductor (5a), ( 5b), outer conductor (6a), (6b) and adhesive conductor (18), a triplate line, (24)
Is a connector plate, (25) is a through hole composed of inner conductors (1a) and (1b), (26) is a through hole composed of inner conductors (2a) and (2b), and (27) is an inner conductor. Through holes composed of (3a) and (3bb), (28) is composed of inner conductors (4a) and (4b), and (29) is composed of inner conductors (5a) and (5b). Through holes, P1 and P2 are input / output terminals.
なお、第1図においては、接着性導体(18)は示してい
ない。The adhesive conductor (18) is not shown in FIG.
内導体(1a)〜(5a),(1b)〜(5b)はそれぞれ、誘
電体ブロック(12a),(12b)の表面上の略凹形の溝
(7a)〜(11a),(7b)〜(11b)の内壁に導体膜を密
着することにより形成されている。外導体(6a),(6
b)は誘電体ブロック(12a),(12b)の底面、および
溝(7a)〜(11a),(7b)〜(11b)と平行な側面にわ
たって導体膜を密着することにより形成されている。短
絡部(13)〜(17)は対応する内導体(1a)〜(5a),
(1b)〜(5b)片側端部の誘電体ブロック側面をわずか
に切り欠いて溝を設け、この溝に導体膜を密着して形成
されている。内導体(1a)〜(5a),(1b)〜(5b)は
それぞれ短絡部(13)〜(17)において導体膜により外
導体(6a)あるいは(6b)に接続され短絡されている。
また、貫通孔(25)〜(29)に充填された接着性導体
(18)の働きにより、対向する内導体(1a)と(1b),
(2a)と(2b),(3a)と(3b),(4a)と(4b),
(5a)と(5b)は相互に電気的に接続され、かつ、2つ
の誘電体ブロック(12a)と(12b)は機械的に接着され
ている。入出力端子P1,P2では、内導体(1a),(1
b),(5a),および(5b)に同軸線路の中心導体が接
着性導体(18)を介して、また、外導体(6a),(6b)
に同軸線路の外導体がコネクタ板(24)を介してそれぞ
れ電気的に直接接続されている。The inner conductors (1a) to (5a), (1b) to (5b) are substantially concave grooves (7a) to (11a) and (7b) on the surfaces of the dielectric blocks (12a) and (12b), respectively. It is formed by closely adhering a conductor film to the inner wall of (11b). Outer conductor (6a), (6
b) is formed by bringing the conductor film into close contact with the bottom surfaces of the dielectric blocks (12a) and (12b) and the side surfaces parallel to the grooves (7a) to (11a) and (7b) to (11b). The short-circuit parts (13) to (17) correspond to the corresponding inner conductors (1a) to (5a),
(1b) to (5b) A side surface of the dielectric block at one end is slightly cut out to form a groove, and a conductor film is closely adhered to the groove. The inner conductors (1a) to (5a) and (1b) to (5b) are connected to the outer conductor (6a) or (6b) by the conductor films at the short-circuit portions (13) to (17), respectively, and are short-circuited.
In addition, the inner conductors (1a) and (1b), which face each other, act by the action of the adhesive conductor (18) filled in the through holes (25) to (29).
(2a) and (2b), (3a) and (3b), (4a) and (4b),
(5a) and (5b) are electrically connected to each other, and the two dielectric blocks (12a) and (12b) are mechanically bonded. At the input / output terminals P1 and P2, the inner conductors (1a), (1
b), (5a), and (5b), the central conductor of the coaxial line via the adhesive conductor (18), and the outer conductors (6a), (6b)
The outer conductors of the coaxial lines are electrically connected directly to each other via the connector plate (24).
次に動作について説明する。第1図〜第3図に示すこの
発明のインターディジタル形ろ波器において、トリプレ
ート線路(20),(21),(22)が同一周波数f0で共振
するものとすれば、周波数f0ではトリプレート線路(1
9)と(23)は共振状態にあるトリプレート線路(2
0),(21),(22)を介して強く結合し、入力端子P1
への入射波は出力端子P2へ導かれる。しかし、f0以外の
周波数では、トリプレート線路(19)〜(23)の結合は
非常に弱く、入力端子P1への入射波はほとんどの電力が
反射される。このように、第1図〜第3図に示したイン
ターディジタル形ろ波器は、帯域通路ろ波器としての機
能を有する。Next, the operation will be described. In the interdigital filter of the present invention shown in FIGS. 1 to 3, if the triplate lines (20), (21), (22) resonate at the same frequency f 0 , the frequency f 0 Then try plate line (1
9) and (23) are triplate lines (2
0), (21), (22) through strong coupling, input terminal P1
The incident wave on is guided to the output terminal P2. However, at frequencies other than f 0 , the coupling of the triplate lines (19) to (23) is very weak, and most of the power of the incident wave on the input terminal P1 is reflected. As described above, the interdigital filter shown in FIGS. 1 to 3 has a function as a bandpass filter.
この発明のインターディジタル形ろ波器は、略直方体の
誘電体ブロックに溝加工を施し、例えば焼き付け等によ
りこの誘電体ブロックの所定の部分に導体膜を密着して
形成されるので、加工が容易であり、かつ、機械的に安
定した内導体(1a)〜(5a),(1b)〜(5b)を形成で
きる。また、誘電体ブロック(12a),(12b)の波長短
縮の効果により内導体(1a)〜(5a),(1b)〜(5b)
を短くできる。The interdigital filter according to the present invention is easy to process because the dielectric block having a substantially rectangular parallelepiped shape is grooved and a conductor film is formed in close contact with a predetermined portion of the dielectric block by, for example, baking. And mechanically stable inner conductors (1a) to (5a) and (1b) to (5b) can be formed. Further, the inner conductors (1a) to (5a), (1b) to (5b) are produced by the effect of shortening the wavelength of the dielectric blocks (12a) and (12b).
Can be shortened.
また、第1図〜第3図の構造のろ波器では内導体(1a)
と(1b),(2a)と(2b),(3a)と(3b),(4a)と
(4b),あるいは(5a)と(5b)に電位差を生じると、
トリプレート線路(19),(20),(21),(22),あ
るいは(23)には第4(a)図に示す基本モードのほか
に第4(b)図のような不要モードが発生する。この発
明のインターディジタル形ろ波器では、接着性導体(1
8)により貫通孔(25)〜(29)を形成する内導体(1
a)と(1b),(2a)と(2b),(3a)と(3b),(4
a)と(4b),および(5a)と(5b)はそれぞれ接続さ
れ同電位となるので、第4(b)図のような不要モード
は発生しない。接着性導体(18)は弾性を有するため、
溝(7a)〜(11a),(7b)〜(11b)の深さが個々に多
少異なる場合でも全ての貫通孔(25)〜(29)において
内導体(1a)と(1b),(2a)と(2b),(3a)と(3
b),(4a)と(4b),および(5a)と(5b)は同時に
接続される。Further, in the filter having the structure shown in FIGS. 1 to 3, the inner conductor (1a)
And (1b), (2a) and (2b), (3a) and (3b), (4a) and (4b), or (5a) and (5b), a potential difference occurs,
The triplate line (19), (20), (21), (22), or (23) has an unnecessary mode as shown in FIG. 4 (b) in addition to the basic mode shown in FIG. 4 (a). Occur. In the interdigital filter of the present invention, the adhesive conductor (1
8) inner conductor (1) forming through holes (25) to (29)
a) and (1b), (2a) and (2b), (3a) and (3b), (4
Since a) and (4b) and (5a) and (5b) are connected and have the same potential, the unnecessary mode as shown in FIG. 4 (b) does not occur. Since the adhesive conductor (18) has elasticity,
Even if the depths of the grooves (7a) to (11a) and (7b) to (11b) are slightly different from each other, the inner conductors (1a), (1b) and (2a) are formed in all the through holes (25) to (29). ) And (2b), (3a) and (3
b), (4a) and (4b), and (5a) and (5b) are connected simultaneously.
なお、上記実施例では、内導体の組数が5組の場合につ
いて示したが、3組,4組,あるいは6組以上でもよく、
上記実施例と同様の効果を奏する。また、上記実施例で
は、溝(7a)〜(11a),(7b)〜(11b)の断面形状が
略凹形の場合について示したが、半楕円形あるいは半円
形でもよく、上記実施例と同様の効果を奏する。In addition, in the above-mentioned embodiment, the case where the number of sets of the inner conductors is 5 is shown, but the number of sets may be 3, 4, or 6 or more,
The same effect as that of the above embodiment is obtained. Further, in the above embodiment, the case where the cross-sectional shape of the grooves (7a) to (11a), (7b) to (11b) is substantially concave is shown, but it may be a semi-elliptical shape or a semi-circular shape. Has the same effect.
[発明の効果] 以上のようにこの発明によれば、2つの直方体形状の誘
電体ブロックそれぞれの表面に一側面からこの側面と対
向する他の側面までの上記表面に平行に複数の溝を設
け、上記2つの誘電体ブロックそれぞれの底面および上
記溝に平行な2つの側面に導体膜を密着して外導体を形
成し、上記溝の内壁に導体膜を密着して複数の内導体を
形成し、この複数の内導体と上記底面の外導体とを交互
に逆側の一端で導体膜の短絡部により短絡し、上記2つ
の誘電体ブロックを、それぞれの上記複数の溝を設けた
表面が対向するように密着し、この密着した面に対して
上記2つの誘電体ブロックが対称となるように組み合わ
せ、かつ、対向する上記内導体により形成される複数の
貫通孔内に接着性導体を充填したため、内導体は振動等
に対して機械的に安定に支持され、加工が容易となり、
対向して貫通孔を形成する上記内導体がそれぞれ同電位
となり、また、誘電体の波長短絡の効果により内導体長
が短くなる。このため、振動等に対して機械的に安定で
かつ、加工が容易であるとともに、小形なものが得られ
るという効果がある。[Effects of the Invention] As described above, according to the present invention, a plurality of grooves are provided in parallel to the surface of each of the two rectangular parallelepiped dielectric blocks from one side surface to the other side surface opposite to this side surface. A conductor film is adhered to the bottom surface of each of the two dielectric blocks and two side surfaces parallel to the groove to form an outer conductor, and a conductor film is adhered to the inner wall of the groove to form a plurality of inner conductors. , The plurality of inner conductors and the outer conductor of the bottom surface are alternately short-circuited at one end on the opposite side by a short-circuit portion of the conductor film, and the two dielectric blocks face each other with the surfaces provided with the plurality of grooves. So that the two dielectric blocks are combined so as to be symmetrical with respect to the closely contacted surface, and the plurality of through holes formed by the inner conductors facing each other are filled with the adhesive conductor. , The inner conductor is resistant to vibration, etc. Supported mechanically stably, easy to process,
The inner conductors that face each other and form a through hole have the same potential, and the inner conductor length is shortened due to the effect of wavelength short-circuiting of the dielectric. For this reason, there is an effect that it is mechanically stable against vibration and the like, is easy to process, and is small in size.
第1図はこの発明の一実施例を示す一部欠載の構成図、
第2図は第1図のAA断面図、第3図は第1図のBB断面
図、第4図は第1図の動作について説明するための図、
第5図は従来のインターディジタル形ろ波器を示す概略
構成図である。 図において、(1a)〜(5a),(1b)〜(5b)は内導
体、(6a),(6b)は外導体、(7a)〜(11a),(7
b)〜(11b)は溝、(12a),(12b)は誘電体ブロッ
ク、(13)〜(17)は短絡部、(18)は接着性導体、
(19)〜(23)はトリプレート線路、(24)はコネクタ
板、(25)〜(29)は貫通孔、P1,P2は入出力端子であ
る。 なお、各図中同一符号は同一または相当部分を示す。FIG. 1 is a partially omitted configuration diagram showing an embodiment of the present invention,
2 is a sectional view taken along the line AA in FIG. 1, FIG. 3 is a sectional view taken along the line BB in FIG. 1, and FIG. 4 is a diagram for explaining the operation of FIG.
FIG. 5 is a schematic configuration diagram showing a conventional interdigital filter. In the figure, (1a) to (5a), (1b) to (5b) are inner conductors, (6a) and (6b) are outer conductors, and (7a) to (11a) and (7
b) to (11b) are grooves, (12a) and (12b) are dielectric blocks, (13) to (17) are short-circuited parts, (18) is an adhesive conductor,
(19) to (23) are triplate lines, (24) is a connector plate, (25) to (29) are through holes, and P1 and P2 are input / output terminals. In the drawings, the same reference numerals indicate the same or corresponding parts.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭63−24701(JP,A) 特開 昭61−189001(JP,A) 特開 昭63−135001(JP,A) 特開 昭61−156902(JP,A) 特開 昭60−62202(JP,A) 特開 昭57−136803(JP,A) 実開 昭61−166603(JP,U) 実開 昭57−117804(JP,U) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 63-24701 (JP, A) JP 61-189001 (JP, A) JP 63-135001 (JP, A) JP 61- 156902 (JP, A) JP 60-62202 (JP, A) JP 57-136803 (JP, A) Actually opened 61-166603 (JP, U) Actually opened 57-117804 (JP, U)
Claims (1)
れの表面に一側面からこの側面と対向する他の側面まで
上記表面に平行に設けられた複数の溝と、上記2つの誘
電体ブロックのそれぞれの底面および上記溝に平行な2
つの側面に導体膜を密着して形成された外導体と、上記
溝の内壁に導体膜を密着して形成された複数の内導体
と、この複数の内導体と上記底面の外導体とを交互に逆
側の一端で短絡する導体膜を短絡部とを備え、上記2つ
の誘電体ブロックを、それぞれの上記複数の溝を設けた
表面が対向するように密着し、上記密着した面に対して
上記誘電体ブロックが対称となるように組み合わせ、か
つ、対向する上記内導体により形成される複数の貫通孔
に接着性導体を充填したことを特徴とするインターディ
ジタル形ろ波器。1. A plurality of grooves provided on one surface of each of the two rectangular parallelepiped dielectric blocks in parallel to the surface from one side surface to the other side surface facing the side surface, and each of the two dielectric blocks. 2 parallel to the bottom of the
An outer conductor formed by closely adhering a conductor film to one side surface, a plurality of inner conductors formed by closely adhering a conductor film to the inner wall of the groove, and the plurality of inner conductors and the outer conductor on the bottom surface are alternately arranged. A conductor film short-circuited at one end on the opposite side and a short-circuit portion, and the two dielectric blocks are adhered to each other such that the surfaces provided with the plurality of grooves face each other. An interdigital filter, wherein the dielectric blocks are combined so as to be symmetrical, and a plurality of through holes formed by the inner conductors facing each other are filled with an adhesive conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1326231A JPH0787281B2 (en) | 1989-12-16 | 1989-12-16 | Interdigital filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1326231A JPH0787281B2 (en) | 1989-12-16 | 1989-12-16 | Interdigital filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03187501A JPH03187501A (en) | 1991-08-15 |
| JPH0787281B2 true JPH0787281B2 (en) | 1995-09-20 |
Family
ID=18185457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1326231A Expired - Lifetime JPH0787281B2 (en) | 1989-12-16 | 1989-12-16 | Interdigital filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0787281B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2661007B2 (en) * | 1992-10-09 | 1997-10-08 | 東光株式会社 | Dielectric filter and pass band adjustment method thereof |
| FI94191C (en) * | 1993-09-28 | 1995-07-25 | Verdera Oy | A coaxial resonator |
| US7411474B2 (en) | 2005-10-11 | 2008-08-12 | Andrew Corporation | Printed wiring board assembly with self-compensating ground via and current diverting cutout |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6216001Y2 (en) * | 1981-01-16 | 1987-04-23 | ||
| JPS61189001A (en) * | 1985-02-18 | 1986-08-22 | Tdk Corp | Inter-digital filter and its manufacture |
| JPH0246082Y2 (en) * | 1985-04-04 | 1990-12-05 | ||
| JPS6324701A (en) * | 1986-07-16 | 1988-02-02 | Murata Mfg Co Ltd | Distrubuted constant line device |
| JPS63135001A (en) * | 1986-11-26 | 1988-06-07 | Toko Inc | Dielectric filter |
-
1989
- 1989-12-16 JP JP1326231A patent/JPH0787281B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03187501A (en) | 1991-08-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100352574B1 (en) | Dielectric Resonator, Dielectric Filter, Dielectric Duplexer, and Communication Device | |
| US6686815B1 (en) | Microwave filter | |
| US6313797B1 (en) | Dielectric antenna including filter, dielectric antenna including duplexer, and radio apparatus | |
| US6166612A (en) | Coplanar line filter and duplexer | |
| JPH0246082Y2 (en) | ||
| US6445263B1 (en) | Dielectric resonator, dielectric filter, duplexer, and communication device | |
| JP2005260570A (en) | Microstrip line waveguide converter | |
| JP3632597B2 (en) | Filter, duplexer and communication device | |
| JPH09252206A (en) | Dielectric filter | |
| CN210167487U (en) | Band-pass filter and high-frequency device including the same | |
| JPS6156881B2 (en) | ||
| KR100401972B1 (en) | Dielectric filter, dielectric duplexer and communication device | |
| US7403085B2 (en) | RF module | |
| JPH0787281B2 (en) | Interdigital filter | |
| JPH11136013A (en) | Bandpass device | |
| CN1177388C (en) | Dielectric filters, dielectric duplexers and communication equipment | |
| JPH07249902A (en) | Strip line filter and means for connecting strip line filter and microstrip line | |
| US6249195B1 (en) | Dielectric filter, dielectric duplexer, and transceiver having circular and polygonal electrode openings | |
| JP2807003B2 (en) | Interdigital filter | |
| JP3412546B2 (en) | Dielectric filter, dielectric duplexer and communication device | |
| JPH11312910A (en) | Dielectric resonator, dielectric filter, dielectric duplexer, communication equipment and manufacturing method for dielectric resonator | |
| KR100519014B1 (en) | Dielectric filter, dielectric duplexer and communication apparatus | |
| JPS61258502A (en) | Microwave filter | |
| JP3441126B2 (en) | Method of adjusting characteristics of dielectric resonant component | |
| JPH0555811A (en) | Dielectric filter and dimultiplexer using the same |