A compact wideband harmonic suppressed 10 dB branch line coupler using cascaded symmetric PI sections

ABSTRACT This article presents the size‐miniaturized, wide‐bandwidth, and harmonic‐suppressed 10 dB branch line coupler (BLC) using cascaded symmetric PI sections. The complete design equations are derived to obtain the physical parameters of cascaded PI sections. To validate the proposed design, a...

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Bibliographic Details
Published in:Microwave and optical technology letters 2016-07, Vol.58 (7), p.1610-1613
Main Authors: Barik, Rusan Kumar, Phani Kumar, Kanaparthi V., Karthikeyan, S S
Format: Article
Language:English
Subjects:
branch line coupler
Design
Design parameters
harmonic suppression
Harmonics
Joining
Mathematical analysis
Microwaves
Physical properties
size miniaturization
symmetric PI sections
Symmetry
Wideband
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Summary:ABSTRACT This article presents the size‐miniaturized, wide‐bandwidth, and harmonic‐suppressed 10 dB branch line coupler (BLC) using cascaded symmetric PI sections. The complete design equations are derived to obtain the physical parameters of cascaded PI sections. To validate the proposed design, a 10 dB BLC operating at 0.9 GHz is designed, fabricated, and tested. The reported BLC is having dimensions of 0.175 λg × 0.25 λg and is 76.6% smaller than the conventional coupler. The measured results show that the designed coupler fractional bandwidth is >52% and up to 4th harmonic is suppressed with a level better than 20 dB. Good agreement is found between the theoretical predictions and experimental results. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:1610–1613, 2016
ISSN:0895-2477
1098-2760
DOI:10.1002/mop.29870