PCT No. PCT / JP97 / 02660 Sec. 371 Date Jan. 20, 1999 Sec. 102(e) Date Jan. 20, 1999 PCT Filed Jul. 31, 1997 PCT Pub. No. WO98 / 05120 PCT Pub. Date Feb. 5, 1998A dual-band multilayer bandpass filter having a first filter unit (18) for filtering a first
signal having a first frequency and a second filter unit (19) for filtering a second
signal having a second frequency. First and second filter units are arranged in stacked
ceramic layers. A first blocking element (20a, 20b; 25a, 25b; 25a', 25b'; 46a, 46b) is coupled to the first filter unit (18) for blocking the second
signal from being applied to the first filter unit (18). A second blocking element (21a, 21b; 26a, 26b; 25c, 25d; 27a, 27b) is coupled to the second filter unit (19) for blocking the first signal from being applied to the second filter unit (19).