JPS61161802A - high frequency filter - Google Patents
high frequency filterInfo
- Publication number
- JPS61161802A JPS61161802A JP60002959A JP295985A JPS61161802A JP S61161802 A JPS61161802 A JP S61161802A JP 60002959 A JP60002959 A JP 60002959A JP 295985 A JP295985 A JP 295985A JP S61161802 A JPS61161802 A JP S61161802A
- Authority
- JP
- Japan
- Prior art keywords
- conductor
- strip
- conductors
- high frequency
- frequency filter
- 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.)
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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
- H01P1/203—Strip line filters
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Waveguides (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は比較的高周波数帯、特にVHF帯、υHF帯
およびマイクロ波帯で多く用いられる高周波ろ波器に間
するもである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to high frequency filters that are often used in relatively high frequency bands, particularly in the VHF band, υHF band and microwave band.
まず、第7図に示す従来の高周波ろ波器について説明す
る。第7図において同図(a)は一部欠載した平面図、
同図(b)は同図(a)のA−A線断面図で、(la)
〜(5a)、(1b)〜(5b)はストリップ導体、(
8a)、(8b)は接地導体、(7)、(8)は同軸端
子、(8)は同軸端子の中心導体、(10a) 、(1
0b)は誘電体板を示す。First, a conventional high frequency filter shown in FIG. 7 will be explained. In FIG. 7, the same figure (a) is a plan view with some parts missing;
Figure (b) is a cross-sectional view taken along line A-A in figure (a), and (la)
~(5a), (1b) ~(5b) are strip conductors, (
8a), (8b) are ground conductors, (7), (8) are coaxial terminals, (8) are center conductors of coaxial terminals, (10a), (1
0b) indicates a dielectric plate.
ストリップ導体(1a)〜(5a)、接地導体(8a)
は誘電体板rloa)に密着した導体膜で形成され、ス
ト−リップ導体(lb)〜(5b)、接地導体(6b)
は誘電体板(10b)に密着した導体膜で形成されてい
る。又、これらのストリップ導体(1a)〜(5a)、
(1b)〜(5b)、接地導体(8a)、(8b) 、
誘電体板(10a)。Strip conductors (1a) to (5a), ground conductor (8a)
is formed of a conductor film in close contact with a dielectric plate (rloa), and includes strip conductors (lb) to (5b) and a ground conductor (6b).
is formed of a conductive film in close contact with the dielectric plate (10b). Moreover, these strip conductors (1a) to (5a),
(1b) to (5b), ground conductor (8a), (8b),
Dielectric plate (10a).
(10b)は、第7図(b)のB−B面に対して対称構
追となるように重ね合わされている。(10b) are superimposed so as to be symmetrical with respect to the B-B plane of FIG. 7(b).
同軸端子(8)の接続部分の形状は、第8図に詳細図を
示すような形状であり、同軸端子(8)は中心導体(9
)がストリップ導体(5aL(5b)の位置に一致する
よう接続される。又、同軸端子(7)の接続法も同様で
ある。The shape of the connecting part of the coaxial terminal (8) is as shown in detail in Fig. 8, and the coaxial terminal (8) is connected to the center conductor (9).
) are connected so as to match the position of the strip conductor (5aL (5b)).The coaxial terminal (7) is also connected in the same manner.
この高周波ろ波器において、ストリップ導体(2a)、
(2b)、 (3a)、(3b) 、及び(4a)、(
4b3が同一周波数fOで共振するものとすれば、周波
数foではストリップ導体(1a)、(lb)と(5a
) 、 (5b)は共振状態にあるメトリー2プ導体(
2a)、(2N 〜(4a)、(4b)を介して強く結
合し、同軸端子(7)への入射波は端子(8)に導かれ
る。しかし、 fo以外の周波数では、ストリップ導体
(la) 、(lb)と(5a) 、 (5Nの結合は
非常に弱く、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7図に示した高周波ろ波器
は帯域通iろ波器としての機能を有する。In this high frequency filter, a strip conductor (2a),
(2b), (3a), (3b), and (4a), (
If 4b3 resonates at the same frequency fO, then at the frequency fo, the strip conductors (1a), (lb) and (5a
), (5b) is the metric 2p conductor (
2a), (2N ~ (4a), (4b), and the incident wave on the coaxial terminal (7) is guided to the terminal (8). However, at frequencies other than fo, the strip conductor (la ), (lb) and (5a), (5N coupling is very weak, and most of the power of the incident wave to terminal (7) is reflected.In this way, the high frequency filter shown in Fig. 7 has the function of a bandpass filter.
しかるに、従来の高周波ろ波器は、ストリップ導体(l
a)、(lb) 〜(5a)、(5b)が誘電体板(1
0a)。However, conventional high frequency filters use strip conductors (l
a), (lb) to (5a), (5b) are dielectric plates (1
0a).
(10b)の間に挾み込まれる構造となっているので、
ストリップ導体(1a)、(lb)〜(5a)、(5b
)間の結合量や共振周波数の調整が困難であるという欠
点があった。Since it has a structure that is sandwiched between (10b),
Strip conductors (1a), (lb) to (5a), (5b
) has the disadvantage that it is difficult to adjust the amount of coupling between them and the resonance frequency.
この発明は上記のような従来のものの公点を除去するた
めになされたもので、ストリップ導体間の結合量や共振
周波数の調整が容易な高周波ろ波器を提供するものであ
る。This invention was made to eliminate the common points of the conventional filters as described above, and provides a high frequency filter in which the amount of coupling between strip conductors and the resonance frequency can be easily adjusted.
この発明にかかる高周波ろ波器は、誘電体板に複数のl
NN膜設、各溝の中にメトリー2プ導体を開放端の向き
が同じになるように形成するとともに、該ストリップ導
体の短絡端側に設ける導体によりストリップ導体の段間
結合を行なうようにしたものである。The high frequency filter according to the present invention has a plurality of lances on a dielectric plate.
In the NN membrane structure, a meter 2 strip conductor is formed in each groove so that the open ends are oriented in the same direction, and the strip conductors are connected between stages by a conductor provided on the short-circuited end side of the strip conductor. It is something.
この発明による高周波ろ波器によっては、ストリップ導
体が誘電体板の露出面に形成されるのでストリップ導体
の結合量や共振周波数の調整が容易となり、かつストリ
ップ導体は溝中に形成されるので誘電体の外の空間に漏
れる電界は非常に小さく平らな誘電体板、ヒに形成され
る通常のマイクロストリップ線路よりも波長短縮率が犬
きく、ストリップ導体が短くなり小形化が図れる。In the high frequency filter according to the present invention, since the strip conductor is formed on the exposed surface of the dielectric plate, it is easy to adjust the coupling amount and resonance frequency of the strip conductor, and since the strip conductor is formed in the groove, the dielectric The electric field that leaks into the space outside the body is extremely small, and the wavelength shortening rate is much higher than that of a normal microstrip line formed on a flat dielectric plate, making the strip conductor shorter and more compact.
またストリップ導体相互の結合に関しては、ストリップ
導体が溝中に設けられているため均一媒質の場合に近い
状態にあり、開放端の向きが同じ174岐長共振器とな
っているため、相互の結合は小さいが、このろ波器では
短絡端側に設ける導体によって段間結合を行なっている
のでストリップ導体間に所定の結合量が得られる。Regarding the mutual coupling between the strip conductors, since the strip conductors are provided in the grooves, the state is close to that of a homogeneous medium, and since the open ends are oriented in the same direction as a 174-branch resonator, mutual coupling is achieved. is small, but in this filter, inter-stage coupling is performed by the conductor provided on the short-circuited end side, so a predetermined amount of coupling can be obtained between the strip conductors.
第1図はこの発明の一実施例を示すもので。 FIG. 1 shows one embodiment of this invention.
(11)〜(13)はストリップ導体、(10は接地導
体、(15)は訓電体板、(1B)、(1?)は外部引
出端子、(18)〜(20)は誘電体板に設けられた溝
、(21)。(11) to (13) are strip conductors, (10 is a ground conductor, (15) is a power distribution board, (1B), (1?) are external lead terminals, and (18) to (20) are dielectric plates. groove provided in (21).
(22)は段間結合用導体である。(22) is an interstage coupling conductor.
−上記ストリップ導体(11)〜(13)は誘電体板(
15)に設けられた*(18)〜(20)のヒ縁部を露
出させて下底部を覆うようにして導体膜で形成され、一
端が開放、他端が接地導体(14)で短絡されて1/4
波長の共振器になっており、これらストリップ導体(1
1)〜(13)は開放端の向きが同じになるように配置
されている。また外部引出端子(181,(17)はそ
れぞれストリップ導体(11)、(12)に直接接続さ
れている。- The strip conductors (11) to (13) are the dielectric plates (
It is formed of a conductive film so that the edges of *(18) to (20) provided in 15) are exposed and the lower bottom is covered, and one end is open and the other end is short-circuited with the ground conductor (14). te 1/4
These strip conductors (1
1) to (13) are arranged so that their open ends are oriented in the same direction. Further, the external lead terminals (181, (17)) are directly connected to the strip conductors (11), (12), respectively.
しかして、導体(21)と(22)はそれぞれストリッ
プ導体(11)、(123問および(12) 、(14
)間の短絡端からスト−リップ導体の全長の1/2以下
の位置に設けられている、なお、ストリップ導体(11
)〜(13)、接地導体(14)、外部引出端子(IE
i)、(17)および段間結合用導体(21)、(22
)は導体膜で誘電体板(15)Hに一体形成される。Therefore, the conductors (21) and (22) are the strip conductors (11), (123) and (12), (14), respectively.
) The strip conductor (11
) to (13), ground conductor (14), external lead terminal (IE
i), (17) and interstage coupling conductors (21), (22
) is a conductive film and is integrally formed on the dielectric plate (15)H.
上記ストリップ導体(11)〜(13)相互の結合に関
しては、ストリップ導体(11)〜(13)が溝中に設
けられているため均一媒質の場合に近い状態にあり、開
放端の向きが同じ1/4波長共振器となっているため、
相互の結合は小さいが、この実施例のる波器では、導体
(21)、(22)によってこれを補償しストリップ導
体(11)〜(13)間に所望の結合量を得ている。Regarding the mutual coupling of the strip conductors (11) to (13), since the strip conductors (11) to (13) are provided in the groove, the state is close to that of a uniform medium, and the open ends are in the same direction. Because it is a 1/4 wavelength resonator,
Although the mutual coupling is small, in the wave transmitter of this embodiment, this is compensated for by the conductors (21) and (22) to obtain the desired amount of coupling between the strip conductors (11) to (13).
上記構成のろ波器において、ストリップ導体(11)〜
(13)が同一周波数toで共振するものとすれば、周
波数foではストリップ導体(11)と(13)は強く
結合し、外部引出端子(18)への入射波は外部引出端
子(17)に導かれる。しかし、to以外の周波数では
ストリップ導体(11)と(13)の結合は非常に弱く
、外部引出端子(1B)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図の廣周波ろ波器は帯域通
過ろ波器としての機能を有する。In the filter having the above configuration, the strip conductor (11) to
(13) resonate at the same frequency to, the strip conductors (11) and (13) are strongly coupled at the frequency fo, and the incident wave on the external extraction terminal (18) is transmitted to the external extraction terminal (17). be guided. However, at frequencies other than to, the coupling between the strip conductors (11) and (13) is very weak, and most of the power of the wave incident on the external lead terminal (1B) is reflected. In this way, the wide frequency filter shown in FIG. 1 has a function as a bandpass filter.
該実施例の高周波ろ波器では、ストリップ導体(11)
〜(13)が誘電体板(15)の露出面に形成されてい
るので、ストリップ導体(11)〜(13)間の結合量
や共振周波数の調整が容易である。結合量は導体(21
)、(22)の短絡端からの距離11す変化させること
により調整することができる。又、共振周波数はストリ
ップ導体(11)〜(13)の長さを変化させたり、開
放端に誘電体を接着したりして容易に調整することがで
きる。外部引出端子(1B)、(17)とストリップ導
体(11)、(13)との結合量は、ストリップ導体(
11)、(13)の短絡端と外部引出端子(1B)、(
17)を接続する位置との間隔12を変化させることに
より調整できる。In the high frequency filter of this embodiment, the strip conductor (11)
Since the strip conductors (11) to (13) are formed on the exposed surface of the dielectric plate (15), the amount of coupling and resonance frequency between the strip conductors (11) to (13) can be easily adjusted. The amount of coupling is the conductor (21
), (22) can be adjusted by changing the distance 11 from the shorted end. Further, the resonant frequency can be easily adjusted by changing the lengths of the strip conductors (11) to (13) or by bonding a dielectric material to the open ends. The amount of coupling between the external lead terminals (1B), (17) and the strip conductors (11), (13) is
11), (13) short-circuited ends and external lead terminals (1B), (
17) can be adjusted by changing the distance 12 from the connecting position.
さらに第1図のストリップ導体(11)〜(13)は溝
(18)〜(20)の中に形成されているので、誘電体
板(15)の外の空間に漏れる電界は鼻常に小さく、平
らな誘電体板Hに形成される通常のマイクロスドリー2
プ線路よりも波長短縮率が大きい、このため、長さがほ
ぼ1/4波長に選ばれるストリップ導体(11)〜(1
3)が短くなり小形化が図られる。Furthermore, since the strip conductors (11) to (13) in FIG. 1 are formed in the grooves (18) to (20), the electric field leaking into the space outside the dielectric plate (15) is always small. Ordinary microstreet 2 formed on a flat dielectric plate H
Strip conductors (11)-(1
3) can be shortened and miniaturized.
ヌ、ストリップ導体(11)〜(13)は、第2図に第
1図のC−C線断面図を示すように略半円弧形状でなり
その中央部が接地導体(10に置接した形状である。こ
のため、接地導体(14)に対向する面の電流分布が平
面的なマイクロストリップ線路の場合のように端部に集
中せず、より均一な電流分布となって、線路損失が小さ
くなる。従って低損失なろ波器を得ることができる。
。The strip conductors (11) to (13) have a substantially semicircular arc shape, as shown in FIG. 2 as a cross-sectional view taken along line C-C in FIG. Therefore, the current distribution on the surface facing the ground conductor (14) does not concentrate at the end like in the case of a planar microstrip line, and the current distribution becomes more uniform, reducing line loss. Therefore, a filter with low loss can be obtained.
.
!3図はこの発明の他の一実施例であり、第1図と同一
部分は同一符号を付し、 (23)、(24)はコンデ
ンサを示す。! FIG. 3 shows another embodiment of the present invention, in which the same parts as in FIG. 1 are given the same reference numerals, and (23) and (24) indicate capacitors.
第3図構成のろ波器では、外部引出端子(1B)。In the filter with the configuration shown in Figure 3, the external lead terminal (1B).
(17)はコンデンサ(23) 、(24)を介してス
トリップ導体(11)、(13)の開放端に接続されて
おり、結合量はコンデンサ(23) 、(24)の静電
容量を変化させることによって調整できるようになって
いる。このろ波器の動作は第1図のろ波器と同様である
。(17) is connected to the open ends of strip conductors (11) and (13) via capacitors (23) and (24), and the amount of coupling changes the capacitance of capacitors (23) and (24). It can be adjusted by The operation of this filter is similar to that of the filter of FIG.
ヌ、第1図のろ波器と同様にストリップ導体(11)〜
(13)間の結合量や共振周波数の調整が容易であり、
通常のマイクロストリップ線路の場合よりも小形、低損
失となる。N, like the filter in Figure 1, the strip conductor (11) ~
(13) It is easy to adjust the coupling amount and resonance frequency between
It is smaller and has lower loss than a normal microstrip line.
また、第4図と第5図は、この発明のさらに他の一実施
例であり、第1図と同一部分は同一符号を付す、なお、
第5図は第4図のD−D線断面図である。Moreover, FIG. 4 and FIG. 5 show still another embodiment of the present invention, and the same parts as in FIG. 1 are given the same reference numerals.
FIG. 5 is a sectional view taken along the line DD in FIG. 4.
第4図のろ波器では、ストリップ導体(11)〜(13
)がl!1(1B)〜(20)全面に形成されているた
め接地導体(10および外部引出端子(18)、(17
)とともに導体膜で一体形成する際に工作が容易である
。In the filter shown in Fig. 4, the strip conductors (11) to (13)
) is l! 1 (1B) to (20) are formed on the entire surface, so the ground conductor (10 and external lead terminals (18), (17)
) is easy to work with when integrally formed with a conductive film.
このろ波器の動作は第1図、第3図のろ波器と同様であ
り、又第1図、第3図のろ波器と同様な特徴を有する。The operation of this filter is similar to that of the filter shown in FIGS. 1 and 3, and it has similar characteristics to the filter shown in FIGS. 1 and 3.
さらに、第6図はこの発明のさらに他の一実施例で第3
図と第4図を合成したもので、この第6図のろ波器では
、第4図のる波器と同様にストリップ導体(11)〜(
13)が溝(18)〜(20)の全面に形成されている
ため1作が容易である。このろ波器の動作は、第1図、
第3図、第4図のる波器と同様であり、ヌ、第1図、第
3図、第4図のる波器と同様な特徴を有する。Furthermore, FIG. 6 shows a third embodiment of the present invention.
This is a composite of Figure 4 and Figure 4. In the filter shown in Figure 6, the strip conductors (11) to (
13) is formed on the entire surface of the grooves (18) to (20), making one operation easy. The operation of this filter is shown in Figure 1.
It is similar to the wave device shown in FIGS. 3 and 4, and has the same characteristics as the wave device shown in FIGS. 1, 3, and 4.
なお、以、ヒはストリップ導体の数が3本の場合につい
て述べたが、4木以−ヒの場合に適用して←よい。Hereinafter, the case where the number of strip conductors is three has been described, but it may also be applied to the case of four strip conductors.
以りのように、この発明に係る高周波ろ波器では、誘電
体板に溝を設け、溝の中にストリップ導体を開放端の向
きが同じになるように形成すると共に、短絡端側に設け
た導体により段階結合を行なうことによって、外部引出
端子とストリップ導体およびストリップ導体間の結合量
や共振周波数の調整が容易であり、かつ小形で低損失な
ろ波器を得ることができるという効果を有する。As described above, in the high frequency filter according to the present invention, a groove is provided in the dielectric plate, and the strip conductor is formed in the groove so that the open ends are oriented in the same direction, and the strip conductor is provided on the short-circuited end side. By performing stepwise coupling using conductors, it is easy to adjust the coupling amount and resonance frequency between the external lead terminal and the strip conductor, and it is also possible to obtain a small filter with low loss. .
第1図はこの発明の高周波ろ波器の概略構成図、第2図
は第1図のC−C線断面図、第3図はこの発明の他の一
実施例を示す概略構成図、第4図はこの発明のさらに他
の一実施例を示す概略構成図、第5図は第4図のD−D
I!断面図、第6図はこの発明のさらに他の一実施例を
示す概略構成図、第7図は従来の高周波ろ波器の概略構
成図で、同図(a)は一部欠載する平面図、同図(b)
は同図(a)のA−A線断面図、第8図は第7図のスト
リップ導体(5a)、(5b)と同軸端子(8)との接
続部分の拡大図である。
図中、 (11)〜(13)はストリップ導体、 (1
4)は接地導体、 (15)は誘電体板、 (18)、
(17)は外部引出端子、(18)〜(20)は溝、
(21)、(22)は導体、(23)、(24)はコン
デンサである。
なお、図中、同一あるいは相当部分には同一符号を付し
て示しである。
代 理 人 大 岩 増 雄第1図
第2図
第3図
第6図FIG. 1 is a schematic configuration diagram of a high frequency filter of the present invention, FIG. 2 is a sectional view taken along the line CC in FIG. 1, and FIG. FIG. 4 is a schematic configuration diagram showing still another embodiment of the present invention, and FIG. 5 is a line DD in FIG. 4.
I! 6 is a schematic configuration diagram showing still another embodiment of the present invention, FIG. 7 is a schematic configuration diagram of a conventional high frequency filter, and FIG. Figure, same figure (b)
8 is an enlarged view of the connecting portion between the strip conductors (5a), (5b) and the coaxial terminal (8) of FIG. 7. FIG. In the figure, (11) to (13) are strip conductors, (1
4) is the ground conductor, (15) is the dielectric plate, (18),
(17) is an external lead terminal, (18) to (20) are grooves,
(21) and (22) are conductors, and (23) and (24) are capacitors. In the drawings, the same or corresponding parts are designated by the same reference numerals. Agent Masuo Oiwa Figure 1 Figure 2 Figure 3 Figure 6
Claims (5)
接地導体を一体形成した高周波ろ波器において、誘電体
板上に複数の溝を設け、上記各溝中に一端短絡他端開放
の上記ストリップ導体をそれぞれ開放端の向きが同じに
なるように形成するとともに、上記ストリップ導体の短
絡端側からストリップ導体の全長の1/2以下の位置に
設けた導体により段間結合を行うことを特徴する高周波
ろ波器。(1) In a high-frequency filter in which a strip conductor and a ground conductor are integrally formed with a conductive film closely adhered to a dielectric plate, a plurality of grooves are provided on the dielectric plate, and one end of each groove is shorted and the other end is open. The above-mentioned strip conductors are formed so that their open ends are oriented in the same direction, and the interstage coupling is performed by a conductor provided at a position of 1/2 or less of the total length of the strip conductor from the short-circuited end side of the above-mentioned strip conductor. Characteristic high frequency filter.
ストリップ導体の中央部が接地導体に近接し、接地導体
に対向する面の電流分布を均一にしてなることを特徴と
する特許請求の範囲第1項記載の高周波ろ波器。(2) A patent characterized in that each of the grooves has a substantially semicircular arc shape, and the center portion of the strip conductor that is in close contact with the groove is close to the ground conductor, so that the current distribution on the surface facing the ground conductor is uniform. A high frequency filter according to claim 1.
底部を覆うようしてなることを特徴する特許請求の範囲
第1項または第2項記載の高周波ろ波器。(3) The high frequency filter according to claim 1 or 2, wherein each of the strip conductors is formed so as to expose the upper edge of the groove and cover the lower bottom of the groove.
ことを特徴とする特許請求の範囲第1項または第2項記
載の高周波ろ波器。(4) The high frequency filter according to claim 1 or 2, wherein each of the strip conductors is formed on the entire surface of the groove.
振周波数を調整するコンデンサを設けると共にこれを介
して外部引出端子を接続したことを特徴とする特許請求
の範囲第1項ないし第4項のいずれかに記載の高周波ろ
波器。(5) Claims 1 to 4, characterized in that a capacitor for adjusting the amount of coupling and resonance frequency is provided on the open end side of the strip conductor, and an external lead terminal is connected via the capacitor. A high frequency filter according to any of the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60002959A JPS61161802A (en) | 1985-01-11 | 1985-01-11 | high frequency filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60002959A JPS61161802A (en) | 1985-01-11 | 1985-01-11 | high frequency filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61161802A true JPS61161802A (en) | 1986-07-22 |
| JPH0473641B2 JPH0473641B2 (en) | 1992-11-24 |
Family
ID=11543902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60002959A Granted JPS61161802A (en) | 1985-01-11 | 1985-01-11 | high frequency filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61161802A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0191502A (en) * | 1987-10-01 | 1989-04-11 | Murata Mfg Co Ltd | Dielectric resonator |
| US5097237A (en) * | 1989-08-14 | 1992-03-17 | Oki Electric Industry Co., Ltd. | Microstrip line type resonator |
| US5160906A (en) * | 1991-06-24 | 1992-11-03 | Motorola, Inc. | Microstripe filter having edge flared structures |
| US5162761A (en) * | 1990-07-09 | 1992-11-10 | Matsushita Electric Industrial Co., Ltd. | Microwave stripline resonator including a dielectric substrate having a depression |
| JPH0697702A (en) * | 1992-09-11 | 1994-04-08 | Mitsubishi Electric Corp | Strip line filter and microstrip line filter |
| US5408206A (en) * | 1992-05-08 | 1995-04-18 | Lk-Products Oy | Resonator structure having a strip and groove serving as transmission line resonators |
| JP2013225787A (en) * | 2012-04-23 | 2013-10-31 | Shimada Phys & Chem Ind Co Ltd | Band pass filter |
-
1985
- 1985-01-11 JP JP60002959A patent/JPS61161802A/en active Granted
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0191502A (en) * | 1987-10-01 | 1989-04-11 | Murata Mfg Co Ltd | Dielectric resonator |
| US5097237A (en) * | 1989-08-14 | 1992-03-17 | Oki Electric Industry Co., Ltd. | Microstrip line type resonator |
| US5162761A (en) * | 1990-07-09 | 1992-11-10 | Matsushita Electric Industrial Co., Ltd. | Microwave stripline resonator including a dielectric substrate having a depression |
| US5160906A (en) * | 1991-06-24 | 1992-11-03 | Motorola, Inc. | Microstripe filter having edge flared structures |
| US5408206A (en) * | 1992-05-08 | 1995-04-18 | Lk-Products Oy | Resonator structure having a strip and groove serving as transmission line resonators |
| JPH0697702A (en) * | 1992-09-11 | 1994-04-08 | Mitsubishi Electric Corp | Strip line filter and microstrip line filter |
| JP2013225787A (en) * | 2012-04-23 | 2013-10-31 | Shimada Phys & Chem Ind Co Ltd | Band pass filter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0473641B2 (en) | 1992-11-24 |
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