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[IEEE 2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - Chengdu, China (2018.5.7-2018.5.11)] 2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - A Novel Circularly Polarized Yagi Antenna
摘要： This paper presents a novel circularly polarized Yagi antenna, consisting of a reflector patch, an oscillator patch, two director patches and two conductor rings. Through the use of Yagi antenna structure and conductor ring structure, antenna gain has been improved. The simulation results show that the antenna has a gain of about 9dB, which is about 4dB higher than that of the existing patch antenna.
关键词： Yagi antenna,circular polarization,conductor ring,stacked patch
更新于2025-09-23 15:22:29
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Printed dual-frequency quasi-Yagi antenna with a monopole driver
摘要： The printed dual-frequency quasi-Yagi antenna with a monopole driver and one-side implementation is proposed for central frequencies f01 = 1.765 GHz and f02 = 1.9 GHz. The antenna contains 2 directors and one reflector which are used as low- and high-frequency passive elements simultaneously.
关键词： printed implementation,dual-frequency antenna,quasi-Yagi antenna,monopole driver
更新于2025-09-23 15:21:01
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[IEEE 2018 IEEE International Conference on Computational Electromagnetics (ICCEM) - Chengdu, China (2018.3.26-2018.3.28)] 2018 IEEE International Conference on Computational Electromagnetics (ICCEM) - Planar Printed Quasi-Yagi Antenna Designs Using Characteristic Modes
摘要： Characteristic mode (CM) analysis is conducted in this paper to understand the physical aspects of a compact planar quasi-Yagi antenna at the lowest resonant frequency for achieving bandwidth enhancement and electrical size reduction. The quasi-Yagi antenna comprises a microstrip feeding line, a driver dipole and two parasitic strips. The driver dipole is modified by symmetrically adding two capacitive coupling structures, which are connected with the ground plane in the other end, through examining the behavior of the CMs. A capacitor with proper value is adopted in the feeding line for better impedance matching in the higher band. Through the work in this paper, the lowest frequency with VSWR < 2 is extended to 3.09 GHz from 3.65 GHz with no physical size enlarged. Its bandwidth is enhanced with a ratio of about 3.78 : 1.
关键词： bandwidth enhancement,characteristic modes,Quasi-Yagi antenna,size reduction
更新于2025-09-10 09:29:36
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A Novel Deployable Quasi-Yagi Monopole Antenna using Three Origami Magic Spiral Cubes
摘要： We propose a deployable quasi-Yagi monopole antenna using origami magic spiral cubes, constructed from low cost paper substrate. The proposed quasi-Yagi antenna consists of an L-shaped driven monopole, an L-shaped reflector, and two L-shaped directors. These driven monopole, reflector and directors are designed in L-shaped geometries to achieve maximum gain in a limited cube size. The driven element and reflector are realized on the origami magic cube #1, while the two directors are designed on the magic cubes #2 and #3, respectively. The cubes are stacked together using a thin adhesive film. The presented geometry of the origami magic spiral cube antenna can be easily folded and unfolded. The dimensions in the unfolded state are 44 mm × 44 mm × 132 mm while the dimensions in the folded state are 44 mm × 44 mm × 8 mm. Therefore, in the folded state, the antenna occupies only 6% of the unfolded volume. We have numerically analyzed the antenna performance and verified the outcomes experimentally. The L-shaped reflector has increased the monopole antenna gain from 1.9 to 5.7 dBi. With the addition of two directors, the gain is further increased to 7.3 dBi at 1.9 GHz.
关键词： Origami magic cube,director,reflector,driven element,deployable Yagi antenna
更新于2025-09-09 09:28:46