JPS59119901A - Dielectric band-stop filter - Google Patents
Dielectric band-stop filterInfo
- Publication number
- JPS59119901A JPS59119901A JP22661882A JP22661882A JPS59119901A JP S59119901 A JPS59119901 A JP S59119901A JP 22661882 A JP22661882 A JP 22661882A JP 22661882 A JP22661882 A JP 22661882A JP S59119901 A JPS59119901 A JP S59119901A
- Authority
- JP
- Japan
- Prior art keywords
- hole
- block
- transmission line
- conductor
- dielectric
- 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.)
- Granted
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
- H01P1/2056—Comb filters or interdigital filters with metallised resonator holes in a dielectric block
Abstract
Description
【発明の詳細な説明】
（１）発明の技術分野
本発明は帯域阻止フィルタ（Ｂａｎｄ ５ｔｏｐｐ’１
ｌｔｅｒ ）に関し、特に誘電体からなる帯域阻止フィ
ルタに関する。DETAILED DESCRIPTION OF THE INVENTION (1) Technical field of the invention The present invention relates to a band-stop filter (Band 5top'1
lter), and in particular to band rejection filters made of dielectric materials.
（２）技術の背景
帯域阻止フィルタ（以下、単に「フィルタ」とも略記）
は分波器、スプリアスの減衰器等に用いられる。しかる
に、従来のフィルタは後述するように大型で重く、温度
特性があまシ良くないなどの理由から、携帯無線や車載
無線などのいわゆる移動無線装置での使用には不適当で
あった。(2) Technical background Band-stop filter (hereinafter also simply abbreviated as “filter”)
is used in duplexers, spurious attenuators, etc. However, as will be described later, conventional filters are large and heavy, and have poor temperature characteristics, making them unsuitable for use in so-called mobile radio devices such as portable radios and vehicle-mounted radios.
（３）従来技術と問題点
第１図から第４図は従来のフィルタの説明図であり、第
１図及び第２図は構造図、第３図は等価電気回路、第４
図は特性をそれぞれ示す。このフィルタは中空金属筐体
１に伝送線路２を一端から他端へ貫通させて設け、そし
て筐体１内に伝送線路２に沿って複数個の共振素子３を
設けて成るものである。これによって第３図に示すよう
なフィルタ回路が構成され、伝送線路２０両端（ＩＮ。(3) Prior art and problems Figures 1 to 4 are explanatory diagrams of conventional filters, Figures 1 and 2 are structural diagrams, Figure 3 is an equivalent electric circuit, and Figure 4 is an explanatory diagram of a conventional filter.
The figures show the respective characteristics. This filter has a hollow metal casing 1 with a transmission line 2 passing through it from one end to the other, and a plurality of resonant elements 3 disposed inside the casing 1 along the transmission line 2. As a result, a filter circuit as shown in FIG. 3 is constructed, and both ends of the transmission line 20 (IN) are configured.
０ＵＴ）を外部回路に接続すれば第４図に示すような特
性のフィルタとして動作する。0UT) to an external circuit, it operates as a filter with characteristics as shown in FIG.
しかるに、阻止帯域の中心周波数−ｆ ｆ ｏ 、
その波長を人とすると、第２図に示すように共振素子の
間隔及び長さを略にとする必要があり、従って大型で重
くなる欠点がある。ま夷この構造は温−変度化によって
伝送特性が大きく変化するという欠点がある。However, the center frequency of the stopband −f f o ,
If we assume that the wavelength is human, the spacing and length of the resonant elements must be approximately shortened as shown in FIG. 2, which has the disadvantage of being large and heavy. However, this structure has the disadvantage that the transmission characteristics change greatly due to changes in temperature.
（４）発明の目的
本発明の目的は、上記従来技術の欠点に鑑み、小形軽量
で温度特性の良い、移動無線装置での使用に適した新規
な帯域阻止フィルタ全提供することにある。(4) Object of the Invention In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a novel band rejection filter that is small, lightweight, has good temperature characteristics, and is suitable for use in mobile radio equipment.
（５）発明の構成
本発明は概略的には、近年、高透電率で温度特性のすぐ
れた低損失の誘電体が開発さ扛ていることに注目し１か
かる誘電体を用いて上記目的の実現を図るものである。(5) Structure of the Invention The present invention generally focuses on the fact that low-loss dielectrics with high conductivity and excellent temperature characteristics have been developed in recent years. The aim is to achieve this goal.
すなわち発明面による帯域阻止フィルタは、誘電体ブロ
ックにその一面から反対面へ貫通する穴を設け、該穴の
内表面に導体膜を形成し、また誘電体ブロックの一側面
に穴配列方向と平行に延在する伝送線路を形成し７誘電
体ブロックの外表面のうち少なくとも一方の穴貫通面な
らびに前記伝送線路の周囲領域を除く全表面に導体膜を
形成して構成したものである。In other words, the band-stop filter according to the invention includes a hole penetrating a dielectric block from one side to the opposite side, a conductive film formed on the inner surface of the hole, and a conductive film formed on one side of the dielectric block parallel to the hole arrangement direction. A transmission line is formed extending over the outer surface of the seven dielectric blocks, and a conductive film is formed on the entire surface of the seven dielectric blocks except for at least one hole-piercing surface and the peripheral area of the transmission line.
（６）発明の実施例
以下１本発明の実施例につき図面を参照して詳細に説明
する。(6) Embodiments of the Invention Below, one embodiment of the present invention will be described in detail with reference to the drawings.
第５図は本発明による誘電体帯域阻止フィルタの一実施
例を示す。図中、符号１０は誘電体ブロック（以下単に
「ブロック」と略記）を示し、このブロック１０に複数
個（図示例では４個）の穴１１をブロックの一面１０ａ
から反対面１０ｂへ貫通させて形成しである。こしらの
穴１１の内表面には厚膜等の方法によって導体膜（ノヘ
ツチングで図示）を形成（メタライズ）しである。また
、ブロック１０の１つの側面１０ｅには、穴１１の配列
方向と平行に延在する伝送線路１２を同じく厚膜等の方
法で形成しである。更に、ブロック１０の外表面には、
一方の穴貫通面１０ａならびに伝送線路１２の周囲領域
１０ｄ、１０ｅ、１０ｆｆ除いた全表面に導体膜（）・
ツチ／グで図示）を形成（メタライズ）しである。尚、
第５図及び第６図に示す例では伝送線路１２はブロック
側面１０Ｃの両端まで延在し、非メタライズ領域１０ｆ
はブロック１０の両端面上に位置する。しかし、第７図
に示す例のように１両端のつまった伝送線路１２’ｉ形
成し、非メタライズ領域１０ｆ”ａ＝ニブロック面１０
Ｃ上に形成した構造としても良い。FIG. 5 shows an embodiment of a dielectric band-stop filter according to the present invention. In the figure, reference numeral 10 indicates a dielectric block (hereinafter simply referred to as "block"), and a plurality of holes 11 (four in the illustrated example) are formed in one surface 10a of the block 10.
It is formed by penetrating from to the opposite surface 10b. A conductor film (indicated by nohetting) is formed (metalized) on the inner surface of the hole 11 by a thick film method or the like. Further, on one side surface 10e of the block 10, a transmission line 12 extending parallel to the direction in which the holes 11 are arranged is similarly formed using a thick film method or the like. Furthermore, on the outer surface of the block 10,
A conductive film () is applied to the entire surface except for one hole penetration surface 10a and the surrounding areas 10d, 10e, and 10ff of the transmission line 12.
(illustrated with ts/g) is formed (metallized). still,
In the example shown in FIGS. 5 and 6, the transmission line 12 extends to both ends of the block side surface 10C, and the non-metalized region 10f
are located on both end faces of the block 10. However, as in the example shown in FIG.
It is also possible to have a structure formed on C.
以上の構造によれば、穴１１の導体膜が内導体を、また
ブロック１０の外表面の導体膜が外導体をそれぞし構成
し、そして内導体は穴貫通面１０Ｈの端部で開放され且
つ穴貝通面１０ｂの端部で外導体に短絡さｒているので
、穴１１の深さを釣具波長とする周波数で共振する共振
素子全構成する。尚、穴貫通面１０ａ、１０ｂの両方を
メタライズしなければ穴１１の内導体は両端開放となり
、穴の深さを約捧波長とする周波数で共振する共振素子
が形成さｎる。According to the above structure, the conductor film in the hole 11 constitutes the inner conductor, and the conductor film on the outer surface of the block 10 constitutes the outer conductor, and the inner conductor is opened at the end of the hole penetrating surface 10H. In addition, since the end of the hole shell passage surface 10b is short-circuited to the outer conductor, the entire structure is a resonant element that resonates at a frequency whose fishing gear wavelength is the depth of the hole 11. Incidentally, unless both of the hole penetrating surfaces 10a and 10b are metalized, both ends of the inner conductor of the hole 11 are open, and a resonant element that resonates at a frequency whose wavelength is approximately equal to the depth of the hole is formed.
従って、例えば第８図に示す如く筺体１３に設けたコネ
クタ１４の端子１４ａ全ブロツク１０の伝送線路１２（
または１２１）の両端に接続しておき、このコネクタ１
４に外部回路全接続すれば。Therefore, for example, as shown in FIG. 8, the terminal 14a of the connector 14 provided in the housing 13,
or 121), and connect this connector 1
If all external circuits are connected to 4.
ブロック１０は層波長型帯域阻止フイ／’Ｌ−夕として
動作する。尚、伝送線路１２（または１２’）の位置お
よび幅寸法ならびに非メタライズ領域１０ｄ。Block 10 operates as a wavelength-based bandstop filter. In addition, the position and width dimension of the transmission line 12 (or 12') and the non-metallized area 10d.
１０ｅの幅寸法等を変えることで共振素子１１と伝送線
１２との結合を成る程度変えることができ。By changing the width dimension of 10e, etc., the coupling between the resonant element 11 and the transmission line 12 can be changed to a certain extent.
動作特性の調整が可能である。Adjustment of operating characteristics is possible.
以上のような誘電体帯域阻止フィルタは、第１図に示し
た従来のフィルタと比べて１寸法が約１／１／７（但し
、εは誘電体の誘電率）となり、小形軽量化が可能とな
る。また、温度特性の良好な誘電体材料（例えばチタン
酸バリウム系）を用いることにより、温度特性も良好な
帯域阻止フィルタが得られる。The dielectric band-stop filter described above has one dimension that is approximately 1/1/7 that of the conventional filter shown in Figure 1 (where ε is the permittivity of the dielectric material), allowing it to be smaller and lighter. becomes. Further, by using a dielectric material (for example, barium titanate) with good temperature characteristics, a band rejection filter with good temperature characteristics can be obtained.
（７）発明の効果
以上のように本発明によｎば、小型＠量で温度特性の良
い、移動無線装置に使用可能なすぐ扛た帯域阻止フィル
タが実現される。(7) Effects of the Invention As described above, according to the present invention, a band rejection filter that is small in size, has good temperature characteristics, and can be used in mobile radio equipment is realized.
第１図から第４図は従来の帯域阻止フィルタの説明図、
第５図から第８図は本発明による誘電体帯域阻止フィル
タの実施例を示し、第５図は斜視図、第６図は左側面図
、第７図は佑送線路の別の形状例を示す部分斜視図、第
８図は外部回路接続部の構造例を示す図である。
１０・・誘電体ブロック、 １０ａ、 １０ｂ・・・穴
貫通面、１０ Ｃ・−・側面、１０ｄ、１０ｅ、１０ｆ
、１０ｆ’ −非メタライズ領域、１１・・・穴（共振
素子）。
１２．１２’・・・伝送線路、１３・・・筐体、１４・
・・コネクタ、１４ａ・・コネクタ端子。
特許出願人
富士通株式会社
特ｈ！ト出願代理人
弁理士 青 木 朗
弁理士 西 舘 和 之
弁理士 内 １）幸 男
弁理士 山 口 昭 之
第１０
第２曹 第４′曲
第３直
矛
第８耐1 to 4 are explanatory diagrams of conventional band rejection filters,
5 to 8 show examples of the dielectric band rejection filter according to the present invention, FIG. 5 is a perspective view, FIG. 6 is a left side view, and FIG. 7 is an example of another shape of the transmission line. FIG. 8 is a partial perspective view showing an example of the structure of the external circuit connection section. 10... Dielectric block, 10a, 10b... Hole penetration surface, 10 C... Side surface, 10d, 10e, 10f
, 10f' - non-metalized region, 11... hole (resonant element). 12.12'...Transmission line, 13...Casing, 14.
... Connector, 14a... Connector terminal. Patent applicant Fujitsu Limited special h! Patent attorney representing the applicant Akira Aoki Patent attorney Kazuyuki Nishidate Patent attorney 1) Yukio Patent attorney Akiyuki Yamaguchi 10th 2nd class 4th song 3rd straight spear 8th time
Claims (1)
を設け、該穴の内表面に導体膜を形成し、また誘電体ブ
ロックの一側面に穴の配列方向と平行に延在する伝送線
路を形成し、誘電体ブロックの外表面のうち少なくとも
一方の穴貫通面ならびに前記伝送線路の周囲領域を除く
全表面に導体膜を形成して成る誘邂体帯域阻止フィルタ
。1. A hole passing through the dielectric block from one side to the other side is provided, a conductive film is formed on the inner surface of the hole, and a transmission line is provided on one side of the dielectric block extending parallel to the direction in which the holes are arranged. A dielectric band-stop filter comprising: a dielectric block having a dielectric block formed thereon, and a conductive film formed on the entire surface of the dielectric block except for at least one hole-piercing surface and the peripheral area of the transmission line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22661882A JPS59119901A (en) | 1982-12-27 | 1982-12-27 | Dielectric band-stop filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22661882A JPS59119901A (en) | 1982-12-27 | 1982-12-27 | Dielectric band-stop filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59119901A true JPS59119901A (en) | 1984-07-11 |
| JPH0367362B2 JPH0367362B2 (en) | 1991-10-22 |
Family
ID=16848021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22661882A Granted JPS59119901A (en) | 1982-12-27 | 1982-12-27 | Dielectric band-stop filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59119901A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01103001A (en) * | 1987-10-15 | 1989-04-20 | Murata Mfg Co Ltd | Dielectric filter |
| JPH0237802A (en) * | 1988-06-14 | 1990-02-07 | Motorola Inc | Filter and radio transmitter/receiver using it |
| JPH02145804U (en) * | 1989-05-12 | 1990-12-11 | ||
| JPH0386605U (en) * | 1989-12-21 | 1991-09-02 | ||
| JPH0398506U (en) * | 1990-01-30 | 1991-10-14 | ||
| JPH03252201A (en) * | 1990-03-01 | 1991-11-11 | Murata Mfg Co Ltd | Band attenuating filter |
| JPH0430601A (en) * | 1990-05-24 | 1992-02-03 | Fuji Elelctrochem Co Ltd | Dielectric filter |
| US5144269A (en) * | 1990-03-20 | 1992-09-01 | Sanyo Electric Co., Ltd. | Dielectric filter having external connection formed on dielectric substrate |
| US5146193A (en) * | 1991-02-25 | 1992-09-08 | Motorola, Inc. | Monolithic ceramic filter or duplexer having surface mount corrections and transmission zeroes |
| EP0595623A1 (en) * | 1992-10-27 | 1994-05-04 | Ngk Spark Plug Co., Ltd. | Dielectric filter |
| AU649140B2 (en) * | 1991-06-25 | 1994-05-12 | Lk-Products Oy | Dielectric filter |
| USRE34898E (en) * | 1989-06-09 | 1995-04-11 | Lk-Products Oy | Ceramic band-pass filter |
| US5408206A (en) * | 1992-05-08 | 1995-04-18 | Lk-Products Oy | Resonator structure having a strip and groove serving as transmission line resonators |
| EP0785592A1 (en) * | 1996-01-19 | 1997-07-23 | Lk-Products Oy | A dielectric resonator structure providing harmonic attenuation |
-
1982
- 1982-12-27 JP JP22661882A patent/JPS59119901A/en active Granted
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01103001A (en) * | 1987-10-15 | 1989-04-20 | Murata Mfg Co Ltd | Dielectric filter |
| JPH0237802A (en) * | 1988-06-14 | 1990-02-07 | Motorola Inc | Filter and radio transmitter/receiver using it |
| JPH02145804U (en) * | 1989-05-12 | 1990-12-11 | ||
| USRE34898E (en) * | 1989-06-09 | 1995-04-11 | Lk-Products Oy | Ceramic band-pass filter |
| EP0694983A1 (en) * | 1989-06-09 | 1996-01-31 | Lk-Products Oy | Ceramic band-pass filter |
| JPH0386605U (en) * | 1989-12-21 | 1991-09-02 | ||
| JPH0398506U (en) * | 1990-01-30 | 1991-10-14 | ||
| JPH03252201A (en) * | 1990-03-01 | 1991-11-11 | Murata Mfg Co Ltd | Band attenuating filter |
| US5144269A (en) * | 1990-03-20 | 1992-09-01 | Sanyo Electric Co., Ltd. | Dielectric filter having external connection formed on dielectric substrate |
| JPH0430601A (en) * | 1990-05-24 | 1992-02-03 | Fuji Elelctrochem Co Ltd | Dielectric filter |
| US5146193A (en) * | 1991-02-25 | 1992-09-08 | Motorola, Inc. | Monolithic ceramic filter or duplexer having surface mount corrections and transmission zeroes |
| US5349315A (en) * | 1991-06-25 | 1994-09-20 | Lk-Products Oy | Dielectric filter |
| AU649140B2 (en) * | 1991-06-25 | 1994-05-12 | Lk-Products Oy | Dielectric filter |
| US5408206A (en) * | 1992-05-08 | 1995-04-18 | Lk-Products Oy | Resonator structure having a strip and groove serving as transmission line resonators |
| US5402090A (en) * | 1992-10-27 | 1995-03-28 | Ngk Spark Plug Co. Ltd. | Dielectric filter comprised of two dielectric substrates and coupling electrodes disposed with the substrates |
| EP0595623A1 (en) * | 1992-10-27 | 1994-05-04 | Ngk Spark Plug Co., Ltd. | Dielectric filter |
| EP0785592A1 (en) * | 1996-01-19 | 1997-07-23 | Lk-Products Oy | A dielectric resonator structure providing harmonic attenuation |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0367362B2 (en) | 1991-10-22 |
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