Super-Compact Substrate Integrated Waveguide Cruciform Directional Coupler

A super-compact substrate integrated waveguide (SIW) directional coupler is proposed and demonstrated. This coupler consists of a simple cross-over of two SIW sections with two inductive metallic posts in a square junction, showing a cruciform. Attractive features including compact size and planar f...

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Bibliographic Details
Published in:IEEE microwave and wireless components letters 2007-11, Vol.17 (11), p.757-759
Main Authors: Djerafi, T., Ke Wu
Format: Article
Language:English
Subjects:
Apertures
Applied sciences
Bandwidth
Beam forming network
Circuit properties
Circuits
Coupling circuits
Dielectric substrates
directional coupler
Directional couplers
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Integrated circuit measurements
Joining
Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits
Microwaves
Millimeter wave integrated circuits
Networks
Planar waveguides
Ports
Rectangular waveguides
Simulation
substrate integrated waveguide (SIW)
Topology
Waveguides
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Description
Summary:A super-compact substrate integrated waveguide (SIW) directional coupler is proposed and demonstrated. This coupler consists of a simple cross-over of two SIW sections with two inductive metallic posts in a square junction, showing a cruciform. Attractive features including compact size and planar form make this coupler structure easily integrable in microwave and millimeter-wave planar circuits, especially in beam-forming networks. A 3-dB coupler operating at 24GHz is designed using HFSS, fabricated and measured. Characteristics of 15dB isolation and 90deg phase shift between the output and coupled ports are achieved over 18% bandwidth. Design considerations and simulated as well as measured results are presented and discussed.
ISSN:1531-1309
2771-957X
1558-1764
2771-9588
DOI:10.1109/LMWC.2007.908040