EP 0738021 A2 19961016 - Wireless communication filter operating at low temperature
Title (en)
Wireless communication filter operating at low temperature
Title (de)
Funkübertragungsfilter für den Tieftemperaturbetrieb
Title (fr)
Filtre de communication sans fil fonctionnant à une température basse
Publication
Application
Priority
- JP 8570895 A 19950411
- JP 9258495 A 19950418
- JP 12771295 A 19950526
- JP 13652595 A 19950602
- JP 13652695 A 19950602
Abstract (en)
A high power filter apparatus which is used in a mobile communication base station or the like is provided wherein the temperature stability and frequency selection are excellent, an insertion loss is small, the size is small, power consumption is low and costs are low. A shield case block (1) comprises signal input and output portions (2a) and (2b), and a plurality of closed spaces (10) which house a filter element (11) connected between the signal input and output portions (2a) and (2b). A cooling plate (3) is provided in a heat insulating container (4) which houses the shield case block (1). The shield case block (1) is fixed to the cooling plate (3) in the thermal contact state. Each filter element (11) is placed almost in parallel. A cylindrical hole having an axis which is almost parallel with the face of the filter element (11) penetrates the shield case block (1). A ground rod made of a conductor which changes the volume of the closed space (10) is provided on the inner end portion of a movable member which moves in the axial direction of the cylindrical hole. <IMAGE>
IPC 1-7
IPC 8 full level
H01P 1/203 (2006.01); H01P 1/213 (2006.01); H01P 1/30 (2006.01)
CPC (source: EP)
H01P 1/20363 (2013.01); H01P 1/2135 (2013.01); H01P 1/30 (2013.01)
Designated contracting state (EPC)
DE FR GB NL SE
DOCDB simple family (publication)
EP 0738021 A2 19961016; EP 0738021 A3 19980304; EP 0738021 B1 20031008; DE 69630258 D1 20031113; DE 69630258 T2 20040506
DOCDB simple family (application)
EP 96105629 A 19960410; DE 69630258 T 19960410