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A sharp‐selective micro strip triplexer with hairpin resonators for long‐term evolution (LTE)
Author(s) -
Mohammadi Pejman,
Ebadzadeh Roghaye,
Mohammadifar Maryam
Publication year - 2020
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.2740
Subject(s) - resonator , planar , antenna (radio) , microstrip , transmitter , electrical impedance , band pass filter , filter (signal processing) , signal (programming language) , electronic engineering , frequency band , physics , topology (electrical circuits) , optoelectronics , materials science , electrical engineering , engineering , computer science , channel (broadcasting) , computer graphics (images) , programming language
Summary A compact size planar micro strip triplexer for long‐term evolution (LTE) is presented. The triplexer consists of three hairpin band pass filters and a T‐shaped micro strip line. T‐shaped microstrip line has been used as input signal splitting structure and hairpin filters bring sharp selectivity. Input impedance matching of the structure carried out with three metalized vias in the middle of the filters. The central pass band frequencies (0.9, 1.17, and 1.5 GHz) are selected according to LTE frequency bands. The pass band of the filters include 0.88 to 0.91, 1.16 to 1.21, and 1.47 to 1.53 GHz. Isolation among the output channels are better than 40 dB. The measurement results verify the design process satisfactorily. The proposed triplexer can be used in BTS antenna for enabling more than one transmitter on a single antenna.