JPH0471033U

JPH0471033U -

Info

Publication number: JPH0471033U
Application number: JP11567690U
Authority: JP
Priority date: 1990-10-31
Filing date: 1990-10-31
Publication date: 1992-06-23

Description

[Brief explanation of drawings]

第１図は本考案の一実施例の分解斜視図、第２
図は第１図の一部を省略した−断面図、第３
図は第１図の一部を省略した−断面図、第４
図は第１図の−断面図、第５図は等価回路図
、第６図は広帯域フイルタとして作動している場
合の特性を示すグラフ、第７図は狭帯域フイルタ
として作動している場合の特性を示すグラフ、第
８図は回路基板に実装した状態の平面図である。１……セラミツクフイルタ、２……第１フイル
タ素子、３……第２フイルタ素子、４……第３フ
イルタ素子。 Fig. 1 is an exploded perspective view of one embodiment of the present invention;
The figure is a sectional view with a part of Figure 1 omitted, and Figure 3.
The figure is a cross-sectional view with a part of Fig. 1 omitted, and Fig. 4
The figure is a cross-sectional view of Fig. 1, Fig. 5 is an equivalent circuit diagram, Fig. 6 is a graph showing the characteristics when operating as a wide band filter, and Fig. 7 is a graph showing the characteristics when operating as a narrow band filter. The graph showing the characteristics, FIG. 8, is a plan view of the device mounted on a circuit board. 1... Ceramic filter, 2... First filter element, 3... Second filter element, 4... Third filter element.

Claims

[Scope of utility model registration request]

a first band filter element having broadband characteristics; and a second band filter element disposed so as to be connectable to the first band filter element.
a bandpass filter element, forming a broadband predetermined characteristic from the first bandpass filter element, and connecting the first bandpass filter element and the second bandpass filter element to form a narrowband characteristic from the second bandpass filter element. A band filter device formed by