Band-pass filter having two loop-shaped electrodes

A band-pass filter comprising:

• two first electrodes formed in a loop shape and disposed in a magnetically connecting state with each other;
• a pair of second electrodes each formed in a plane shape opposite said first electrodes on opposite sides thereof;
• a pair of plates comprising a dielectric material, each said plate having two opposed edges and being disposed between said first electrodes and a respective one of said second electrodes;
• two earth terminals drawn out respectively from said two first electrodes and extending toward respective opposed edges of said plate;
• two input/output terminals associated respectively with said two earth terminals and drawn out respectively from said two first electrodes and extending toward respective opposed edges of said plate, said earth terminals and input/output terminals from said first electrodes being spaced apart by a selected distance so as to provide a predetermined impedance;
• and
• each of said second electrodes having a pair of second earth terminals drawn out from said each second electrode toward respective opposed edges of said plate.

A band-pass filter comprising:

• two first electrodes formed in a loop shape and disposed in a magnetically connecting state with each other;
• a second electrode formed in a plane shape opposite said first electrodes;
• a plate comprising a dielectric material, said plate having a periphery and being disposed between said first electrodes and said second electrode;
• two earth terminals drawn out from said two first electrodes respectively and extending toward said periphery of said plate;
• two input/output terminals associated respectively with said two earth terminals and drawn out from said two first electrodes and extending toward said periphery of said plate;
• said earth terminals and input/output terminals being spaced apart by a selected distance around said periphery so as to provide a predetermined impedance;
• and
• a pair of second earth terminals drawn out from said second electrode toward said periphery of said plate.

A band-pass filter comprising:

• two first electrodes formed in a loop shape and disposed in a magnetically connecting state with each other;
• a pair of second electrodes each formed in a plane shape opposite said first electrodes on opposite sides thereof;
• a pair of plates comprising a dielectric material, each said plate having a periphery and being disposed between said first electrodes and a respective one of said second electrodes;
• two earth terminals drawn out from said two first electrodes respectively and extending toward said periphery of said plate;
• two input/output terminals associated respectively with said two earth terminals and drawn out respectively from said two first electrodes and extending toward said periphery of said plate;
• said earth terminals and input/output terminals from said first electrodes being spaced apart around said periphery by a selected distance so as to provide a predetermined impedance;
• and
• each of said second electrodes having a pair of second earth terminals drawn out from said each second electrode toward said periphery of said plate.