Circular Polarized Square Slot Antenna Based on Slow-Wave Substrate Integrated Waveguide

The design of a compact substrate integrated waveguide (SIW) cavity-backed circular-polarized antenna using a slow wave structure is proposed in PCB technology. Based on a multilayer substrate, this topology includes internal metallized blind via holes connected to the bottom conductive plane, induc...

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Veröffentlicht in:IEEE transactions on antennas and propagation 2021-03, Vol.69 (3), p.1273-1282
Hauptverfasser: Ho, Anh Tu, Pistono, Emmanuel, Corrao, Nicolas, Ferrari, Philippe
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creator Ho, Anh Tu
Pistono, Emmanuel
Corrao, Nicolas
Ferrari, Philippe
description The design of a compact substrate integrated waveguide (SIW) cavity-backed circular-polarized antenna using a slow wave structure is proposed in PCB technology. Based on a multilayer substrate, this topology includes internal metallized blind via holes connected to the bottom conductive plane, inducing the physical separation of electric and magnetic fields in the SIW cavity. Hence, a slow wave effect is obtained, allowing a 47% reduction of the antenna cavity in comparison with its classic SIW antenna counterpart. Moreover, by asymmetrically inserting an inductive via into the patch region, a degenerated mode allows both a circular polarization and an enlargement of impedance bandwidth. Measurements and simulations are in good agreement in terms of radiation pattern and circular polarization with a return loss of 15 dB and a gain of 4.8 dBic.
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source IEEE Electronic Library (IEL)
subjects Antennas
Cavity-backed slot antenna (CBSA)
Circular polarization
Electric fields
Enlargement
Magnetic fields
Metallizing
Microstrip
Microstrip antennas
miniaturization
Multilayers
Polarization
Slot antennas
slow wave structure
standard PCB process
substrate integrated waveguide (SIW)
Substrate integrated waveguides
Topology
title Circular Polarized Square Slot Antenna Based on Slow-Wave Substrate Integrated Waveguide
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