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A miniaturized broadband monopulse comparator with all DELTA channels nulling in Ku band

Published online by Cambridge University Press:  03 August 2018

Saeid Alamdar Open the ORCID record for Saeid Alamdar [Opens in a new window] ,
Karim Mohammadpour-Aghdam ,
Hossein Khalili  and
Mahmoud Mohammad-Taheri
Saeid Alamdar
Affiliation:
School of Electrical and Computer Engineering, University of Tehran, Tehran, Iran
Karim Mohammadpour-Aghdam*
Affiliation:
School of Electrical and Computer Engineering, University of Tehran, Tehran, Iran
Hossein Khalili
Affiliation:
School of Electrical and Computer Engineering, University of Tehran, Tehran, Iran
Mahmoud Mohammad-Taheri
Affiliation:
School of Electrical and Computer Engineering, University of Tehran, Tehran, Iran
*
Author for correspondence: K. Mohammadpour-Aghdam, E-mail: kaghdam@ut.ac.ir
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Abstract

A compact monopulse comparator with complete nulling in all DELTA channels is designed and fabricated. The proposed comparator has small dimension and consists of interconnections of four broadband branch-line couplers and several 90° phase shifters with multistage Schiffman coupled-lines. This comparator has been characterized by its eight-port S-parameters to generate the SUM and DELTA channel frequency responses. Over 30-dB null depth was achieved in DELTA channels across the SUM channels in pass band from 14.8 to 18.2 GHz frequency range.

Keywords

90° Hybrid coupler-Schiffman phase shiftermonopulse comparator
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 10 , Issue 9 , November 2018 , pp. 1035 - 1041
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2018 

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