Hostname: page-component-54dcc4c588-2ptsp Total loading time: 0 Render date: 2025-09-11T16:30:15.815Z Has data issue: false hasContentIssue false
  • English
  • Français

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
Get access Rights & Permissions [Opens in a new window]

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

Information

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 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

References

1.Ang, KS, Leong, YC and Lee, CH (2003) A wide-band monopulse comparator with complete nulling in all delta channels throughout sum channel bandwidth. IEEE Transactions on Microwave Theory and Techniques 51, 371–373.Google Scholar
2.Gharibi, H and Hojjat-Kashani, F (2012) Design of a wideband monopulse antenna using four conical helix antennas. Progress in Electromagnetics Research Letters 29, 25–33.Google Scholar
3.Barker, NS and Rebeiz, GM (1997) An octave bandwidth monopulse processor, in Microwave Symposium Digest, 1997, IEEE MTT-S International 1997, vol. 2, pp. 405–407, IEEE.Google Scholar
4.Wang, H, Fang, D-G and Chen, X (2006) A compact single layer monopulse microstrip antenna array. IEEE Transactions on Antennas and Propagation 54, 503–509.Google Scholar
5.Schiffman, B (1958) A new class of broad-band microwave 90-degree phase shifters. IRE Transactions on Microwave Theory and Techniques 6, 232–237.Google Scholar
6.Quirarte, JR and Starski, JP (1991) Synthesis of Schiffman phase shifters. IEEE Transactions on Microwave Theory and Techniques 39, 1885–1889.Google Scholar
7.Guo, Y-X, Zhang, Z-Y and Ong, LC (2006) Improved wide-band Schiffman phase shifter. IEEE Transactions on Microwave Theory and Techniques 54, 1196–1200.Google Scholar
8.Mohammadpour-Aghdam, K, Komjani, N, Vandenbosch, G and De Raedt, W (2009) A broadband modified differential phase shifter for microwave applications, in Microwave Conference, EuMC 2009. European, 2009, pp. 069–072, IEEE.Google Scholar
9.Muraguchi, M, Yukitake, T and Naito, Y (1983) Optimum design of 3-dB branch-line couplers using microstrip lines. IEEE Transactions on Microwave Theory and Techniques 31, 674–678.Google Scholar
10.Aghdam, KMP, Faraji-Dana, R and Rashed-Mohassel, J (2004) Optimization of microstrip tapered balun for sinuous antenna feeding circuits, in Antenna Technology and Applied Electromagnetics and URSI Conference, ANTEM 2004. 10th International Symposium on, 2004, pp. 1–4, IEEE.Google Scholar