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Frequency and circular‐polarization switchable microstrip antenna for dynamic spectrum allocation
Author(s) -
Pyo Seongmin,
Jo HanShin,
Park SungHo,
Park JongSung,
Lee Hyungjoo
Publication year - 2018
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.31470
Subject(s) - circular polarization , reconfigurable antenna , pin diode , polarization (electrochemistry) , microstrip antenna , physics , optics , microstrip , axial ratio , degenerate energy levels , frequency band , antenna (radio) , electronic engineering , diode , engineering , telecommunications , optoelectronics , coaxial antenna , chemistry , quantum mechanics
This article presents a novel frequency‐reconfigurable microstrip antenna supported with an opposite circular polarization sense for dynamic spectrum allocation. The degenerate TM 10 and TM 01 frequencies are designed by using the distinctly separated electrical delay depending on the H‐shaped slot along the feeding positions for generating circularly polarized waves. In addition, the circularly polarization sense is controlled by changing the status of the pin diode because the switched vertical path affects only TM 10 frequency without changing horizontal TM 01 frequency. To verify the feasibility of the proposed antenna, the conceptual equivalent circuit is established and the experimental validation is carried out. The implemented antenna successfully demonstrates frequency‐reconfigurable capability with opposite circular polarizations and shows a good agreement with the simulation results.