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A dual-band crossover using cross-shaped microstrip line for small and large band ratios

Published online by Cambridge University Press:  17 April 2017

Idury Satya Krishna ,
Rusan Kumar Barik  and
S. S. Karthikeyan
Idury Satya Krishna*
Affiliation:
Department of Electronics Engineering, Indian Institute of Information Technology Design and Manufacturing Kancheepuram, Chennai-600127, India
Rusan Kumar Barik
Affiliation:
Department of Electronics Engineering, Indian Institute of Information Technology Design and Manufacturing Kancheepuram, Chennai-600127, India
S. S. Karthikeyan
Affiliation:
Department of Electronics Engineering, Indian Institute of Information Technology Design and Manufacturing Kancheepuram, Chennai-600127, India
*
Corresponding author: I. Satya Krishna Email: cds15m002@iiitdm.ac.in
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Abstract

A novel design of planar dual-band microstrip crossover operating at small and large frequency ratios is presented. These features of the proposed dual-band crossover are achieved by a cross-shaped transmission line. To obtain the dual-band characteristics, the required closed form design formulas are computed using the ABCD matrix method. Based on the design formulas, the realizable small and large band ratios are calculated as 1.65–2.14 and 4.1–8.76, respectively. To validate the computed band ratios, three examples of dual-band crossovers are presented. Finally, two prototypes of dual-band crossover working at smaller and larger frequency ratios are fabricated and tested. The fabricated dual-band crossovers exhibit good return loss and isolation of over 20 dB with minimal insertion loss.

Keywords

Passive components and circuitsModelingSimulation and characterizations of devices and circuits
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 9 , Special Issue 8: Biomedical Applications of RF/Microwave and Optics Technologies , October 2017 , pp. 1629 - 1635
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2017 

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