2022 Volume 15 Pages E21-017-1-E21-017-7
In this short note, we present a compact triplexer for the GPS, 2.4-GHz wireless systems, and the 5-GHz WLAN. This triplexer consists of chip filters, capacitors, and inductors on a printed circuit board. It is based on L-type matching networks. The design area of the prototype is less than 8 × 7 mm2. Insertion losses are less than 1.9 dB, 2.7 dB, and 1.8 dB in each passband. The prototype also achieves high attenuation performances with sharp roll-off characteristics. The isolations are higher than 30 dB in each band.