Enabling MIMO Antenna Miniaturization and Wide Circular Polarization Coverage by Amalgamation of a Dielectric Strip Between Meandered Traces and Slotted Ground
2022; IEEE Antennas & Propagation Society; Volume: 21; Issue: 9 Linguagem: Inglês
10.1109/lawp.2022.3184535
ISSN1548-5757
AutoresShahanawaz Kamal, Mohd Fadzil Ain, Ubaid Ullah, Mohamad Faiz Mohamed Omar,
Tópico(s)Microwave Engineering and Waveguides
ResumoThis letter presents a dual-element multiple-input–multiple-output antenna for applications in the very high frequency band. A compact geometry of microstrip line-fed radiators engaging 0.04 $ \times $ 0.04 ${{\boldsymbol{\lambda }}}^2$ footprint at 150 MHz was fabricated on an FR-4 substrate and tested in the anechoic chamber. Good circularly polarized radiation patterns were generated by employing two corner-fed meander lines and integrating slots at strategic locations of the ground. A dielectric strip was stacked above the substrate and between the two meandered elements to enable $ -$ 10 dB impedance bandwidth of 24%. In the operating frequency band from 133 to 169 MHz, the proposed antenna offered axial ratio of -25 dB, gain of $\sim $ 3 dBi, efficiency ( ${\boldsymbol{\eta }}$ ) of $\sim $ 80%, envelope correlation coefficient of $ < $ 0.5 and diversity gain of $\sim $ 10 dB.
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