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Microstrip diplexer design based on two square open loop bandpass filters for RFID applications

Published online by Cambridge University Press:  12 March 2018

Hafid Tizyi ,
Fatima Riouch ,
Abdelwahed Tribak ,
Abdellah Najid  and
Angel Mediavilla
Hafid Tizyi*
Affiliation:
STRS Lab., National Institute of Posts and Telecommunications – INPT.Rabat – Morocco
Fatima Riouch
Affiliation:
STRS Lab., National Institute of Posts and Telecommunications – INPT.Rabat – Morocco
Abdelwahed Tribak
Affiliation:
STRS Lab., National Institute of Posts and Telecommunications – INPT.Rabat – Morocco
Abdellah Najid
Affiliation:
STRS Lab., National Institute of Posts and Telecommunications – INPT.Rabat – Morocco
Angel Mediavilla
Affiliation:
DICOM, University of Cantabria Santander, Spain
*
Author for correspondence: Hafid Tizyi, E-mail: tizyi@inpt.ac.ma
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Abstract

In this work, a simple and efficient approach to design a microstrip diplexer is proposed. It is based on the combination of two compact Square Open Loop Resonator band pass filters. These filters are designed for Radio Frequency Identification application at 2.45 GHz frequency. Using the Chebychev approximation, the two filters and diplexer are designed, simulated, fabricated, and measured. The results show that the diplexer presents a high selectivity, a good insertion loss and high isolation (>40 dB) with the compact size. The diplexer also shows a good performance when associated with the patch antenna operating at 2.45 GHz.

Keywords

Antenna designfiltersmodelling and measurementsRFID andsensors
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 10 , Issue 4 , May 2018 , pp. 412 - 421
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2018 

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