Coupled Yagi arrays

Lee, C.; Shen, Liang-Chi

doi:10.1109/tap.1977.1141698

Cited by 3 publications

(2 citation statements)

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“…Suppose the antenna will be designed on dielectric substrate with relative permittivity of ε r = 2.65 at the center frequency of 2.4 GHz. The radius and flared angle of the principal sectorial dipole can be calculated by (2) [40], where ε e is relative dielectric constant that can be estimated by empirical expressions indicated in [41], ν is the circumferential eigen-number determined by the flared angle α, and χ ν1 is the first root of the first-order derivative of the ν-order Bessel function of the first kind, respectively [39,40]. When the flared angle is set as β = 270° [39], the radius can be initially calculated as R 0 = 26.5 mm [42].…”

Section: A Equivalent Six-source Modelmentioning

confidence: 99%

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Dual-Resonant High-Gain Wideband Yagi-Uda Antenna Using Full-Wavelength Sectorial Dipoles

Jia

et al. 2021

IEEE Open J. Antennas Propag.

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A novel design approach to high-gain, wideband, dual-resonant, closely-spaced, three-element Yagi-Uda antenna is advanced. The antenna is comprised by a full-wavelength, principal sectorial dipole, a circular metallic flat reflector, and a sectorial director. At first, a multi-source model is developed to predict the initial values of the key antenna parameters, e.g., the flared angle/radius of the director, and the separation between them. Then, as theoretically predicted, numerically simulated and experimentally validated, the flared angles of the principal radiator and the director are eventually determined as 270° and 180°, respectively. They are further tightly coupled at a close separation of 0.024-wavelength to yield relatively compact size and high gain simultaneously. Prototype antenna with a circular metallic reflector successfully exhibits an impedance bandwidth up to about 40%, with in-band maximum gain up to 10.4 dBi and gain fluctuation less than 3 dB. Finally, the antenna is comparatively studied with other Yagi-Uda antennas to highlight its unique wideband and high gain characteristics. Index Terms Wideband antenna, Yagi-Uda antenna, full-wavelength dipole antenna, dual-mode resonance, high gain antenna.

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Section: A Equivalent Six-source Modelmentioning

confidence: 99%

“…Yagi-Uda antennas enjoy many advantages over conventional elementary antennas, such as high gain/directivity, easy to set up, and low cost. Since invented in 1926 [1], variants of Yagi-Uda antennas have been extensively developed and presented [2][3][4]. Up to now, Yagi-Uda antennas can be basically classified into four distinctive types.…”

Section: Introductionmentioning

confidence: 99%