Circuit model for microstrip array antenna with defected ground structures for mutual coupling reduction and beamforming applications
A microstrip array antenna (MAA) structure incorporated with an orthogonal I-shaped defected ground structure (OI-DGS) was proposed and investigated and its equivalent circuit was created. Reflection losses were simulated and verified with the proposed circuit model using CST Commercial and AWR...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Penerbit UTHM
2021
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/6900/1/J14094_625f76653cd0caa7792eb256320b72b1.pdf http://eprints.uthm.edu.my/6900/ https://doi.org/10.30880/ijie.2021.13.01.010 |
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| Summary: | A microstrip array antenna (MAA) structure incorporated with an orthogonal I-shaped defected ground
structure (OI-DGS) was proposed and investigated and its equivalent circuit was created. Reflection losses were
simulated and verified with the proposed circuit model using CST Commercial and AWR Microwave Office
software. The optimized S11 parameter of the model was obtained by tuning the dimensions of the microstrip patch
elements in the MAA and the lengths and widths of the slots of defected ground structure (DGS). The proposed
equivalent circuit is expected to be useful as a model for the DGS design and to study its behavior. Finally, two
prototypes of MAA, without and with OI-DGS, were fabricated by the milling technology and tested. The
simulated results showed that -5.53 dB mutual coupling reduction and the measured around -3 dB. The simulated
results demonstrate that main beam shifted 43° while the measured main beam shifted 36°. |
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