A Low-Cost, Single-Layer, Dual Circularly Polarized Antenna for Millimeter-Wave Applications

This letter presents a low-cost, single-layer, dual circularly polarized (CP) series-fed antenna based on the sequential rotation technique for millimeter-wave (MM-wave) applications. The series-fed working form endows the proposed antenna with more compact structure and lower ohmic, dielectric loss...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2019-04, Vol.18 (4), p.651-655
Main Authors: Yang, Yu-Hang, Sun, Bao-Hua, Guo, Jing-Li
Format: Article
Language:English
Subjects:
Antenna design
Antenna feeds
Antenna measurements
Antenna radiation patterns
Bandwidth
Bandwidths
Circular polarization
Circularly polarized (CP) antenna
Dielectric loss
dual circularly polarized
Gain
Low cost
Microstrip
Microstrip antennas
Microstrip transmission lines
millimeter wave (MM wave)
Millimeter waves
sequential rotation
series-fed antenna
single layer
Transmission lines
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Description
Summary:This letter presents a low-cost, single-layer, dual circularly polarized (CP) series-fed antenna based on the sequential rotation technique for millimeter-wave (MM-wave) applications. The series-fed working form endows the proposed antenna with more compact structure and lower ohmic, dielectric losses caused by the feeding network compared with parallel-fed antennas. The curved microstrip transmission lines are adopted as radiation elements; therefore, the whole antenna can be etched on a single-layer laminate using standard printed circuit board technology. These characteristics make the antenna a competitive candidate for MM-wave applications. To validate the proposed design, a dual-CP antenna operating at 30 GHz is fabricated. Based on the measurement, the proposed antenna has a 3 dB gain bandwidth of 1.97 GHz, the measured |S 21 | is lower than -20 dB, and the axial ratios are lower than 3 dB in the aforementioned frequencies.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2019.2900301