JPS62125002U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の第１実施例になるヘリカル共
振器フイルタを示す図、第２図は第１図のフイル
タの電気的回路図、第３図はフイルタ共振器のコ
イル上の電圧、電流分布を示す図、第４図は第１
図中隣合う一対の共振器による特性を示す図、第
５図は第１図のフイルタの特性を示す図、第６図
は本考案の第２実施例になるヘリカル共振器フイ
ルタを示す図、第７図は本考案の第３実施例にな
るヘリカル共振器フイルタを示す図、第８図は第
７図のフイルタの特性を示す図、第９図は第７図
のフイルタを適用した１例である自動車電話用の
アンテナ共用器を示す図、第１０図は従来のヘリ
カル共振器フイルタの１例を示す図、第１１図は
第１０図のフイルタの特性を示す図、第１２図は
従来のヘリカル共振器フイルタの別の例を示す図
、第１３図は第１２図のフイルタの特性を示す図
、第１４図及び第１６図は夫々本考案者が案出し
たヘリカル共振器フイルタの各例を示す図、第１
５図はこのフイルタの特性を示す図、第１７図は
第１６図中入力側の二つのヘリカル共振器のコイ
ル上の電圧、電流分布を示す図である。 ２_２，２_３，５３，５４…通常サイズのヘリカ
ル共振器、６_２，６_３，１６，５５〜５８…アー
ス点、７_２，７_３，１５…コイル、１３，５１，
５２…小型のヘリカル共振器、３０，４０，５０
…ヘリカル共振器フイルタ、３１，３２…結合用
窓、３９，６７，６８…スペース、５１，５２…
小型ヘリカル共振器、６５，６６…マツチング素
子。 Fig. 1 is a diagram showing a helical resonator filter according to the first embodiment of the present invention, Fig. 2 is an electrical circuit diagram of the filter shown in Fig. 1, and Fig. 3 is a diagram showing the voltage and current on the coil of the filter resonator. Diagram showing the distribution, Figure 4 is the first
5 is a diagram showing the characteristics of a pair of adjacent resonators, FIG. 5 is a diagram showing the characteristics of the filter in FIG. 1, and FIG. 6 is a diagram showing a helical resonator filter according to a second embodiment of the present invention. Fig. 7 is a diagram showing a helical resonator filter according to the third embodiment of the present invention, Fig. 8 is a diagram showing the characteristics of the filter in Fig. 7, and Fig. 9 is an example in which the filter in Fig. 7 is applied. 10 is a diagram showing an example of a conventional helical resonator filter, FIG. 11 is a diagram showing the characteristics of the filter in FIG. 10, and FIG. 12 is a diagram showing a conventional helical resonator filter. FIG. 13 is a diagram showing the characteristics of the filter in FIG. 12, and FIGS. 14 and 16 are diagrams showing each of the helical resonator filters devised by the present inventor. Figure showing an example, 1st
FIG. 5 is a diagram showing the characteristics of this filter, and FIG. 17 is a diagram showing the voltage and current distributions on the coils of the two helical resonators on the input side in FIG. 16. 2 ₂ , 2 ₃ , 53, 54... Normal size helical resonator, 6 ₂ , 6 ₃ , 16, 55-58... Earth point, 7 ₂ , 7 ₃ , 15... Coil, 13, 51,
52...Small helical resonator, 30, 40, 50
...Helical resonator filter, 31, 32... Coupling window, 39, 67, 68... Space, 51, 52...
Small helical resonator, 65, 66...matching element.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 共振室を形成し結合窓を有するシールドケース
と、一端を該シールドケースに固定されて該共振
室内に設けられ、固定側をアース点とされたコイ
ルと、該ケースに設けた調整用のコアとよりなる
ヘリカル共振器を複数個、上記各共振室が上記結
合窓を通して連通するように結合してなるヘリカ
ル共振器フイルタにおいて、入力側及び／又は出
力側に他より形状の小型のヘリカル共振器を設け
ると共に、該小型ヘリカル共振器に続く一つ通常
サイズのヘリカル共振器をそのアース点が該小型
ヘリカル共振器のアース点と同一側となる向きと
し、且つ該一の通常サイズのヘリカル共振器に続
く別の通常サイズのヘリカル共振器をそのアース
点が該一の通常サイズのヘリカル共振器のアース
点とは反対側となる向きとしてなる構成のヘリカ
ル共振器フイルタ。 A shield case forming a resonant chamber and having a coupling window; a coil having one end fixed to the shield case and provided within the resonant chamber, with the fixed side serving as a ground point; and an adjustment core provided in the case. In a helical resonator filter formed by coupling a plurality of helical resonators such that each of the resonant chambers communicates through the coupling window, a smaller helical resonator with a smaller shape than the others is provided on the input side and/or the output side. At the same time, one normal-sized helical resonator following the small helical resonator is oriented so that its ground point is on the same side as the ground point of the small helical resonator, and A helical resonator filter having a configuration in which a subsequent normal-sized helical resonator is oriented such that its ground point is on the opposite side to the ground point of the first normal-sized helical resonator.