a compact and high - performance rf duplexer and fabrication method thereof , the rf duplexer includes a first filter and a second filter suspended over the substrate connected in series and in parallel and having a plurality of resonators , for passing signals of different frequency bands . a plurality of inductors are connected in series with the parallel resonators of the first and second filters and formed on the substrate . a phase shifter is formed on the substrate for preventing a signal interference between the first and second filters , and a supporter supports the first and second filters and has a plurality of bumps at certain parts on the substrate to electrically connect terminals of the first and second filter with terminals of the substrate . accordingly , the size of the duplexer is reduced by forming the tuning inductors around the bumps of the pcb .