Journal
SENSORS
Volume 21, Issue 12, Pages -Publisher
MDPI
DOI: 10.3390/s21124100
Keywords
CP radiation; microstrip antenna; dielectric-resonator antenna; hybrid dielectric resonator antenna; wide-band antennas; multi-functional antennas
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Recent trends in dielectric resonator antenna research include the use of compound and hybrid structures, which have shown interesting and significant features in terms of bandwidth, gain, and circular polarization generation. This critical review discusses the evolution of circularly polarized hybrid dielectric resonator antennas, with a general discussion on circular polarization and DR antennas, along with indications of future challenges and new design ideas. Additionally, state-of-the-art advances and associated design challenges of circularly polarized hybrid DR antennas are discussed, including empirical formulas to find resonance frequency of different hybrid modes.
Recently, it has been a feasible approach to build an antenna, in view of the potential advantages they offer. One of the recent trends in dielectric resonator antenna research is the use of compound and hybrid structures. Several considerable investigations have been already underway showing quite interesting and significant features in bandwidth, gain, and generation of circular polarization. A critical review on a journey of circularly polarized hybrid dielectric resonator antennas is presented in this article. A general discussion of circular polarization and DR antennas are provided at the forefront. Evolution, significant challenges, and future aspects with new ideas in designing hybrid dielectric resonator antennas are indicated at the end of the review. State-of-the-art advances and associated design challenges of circularly polarized hybrid DR antennas and related empirical formulas used to find resonance frequency of different hybrid modes produced are discussed in this paper.
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