Analysis and Design of Wideband Planar Yagi- And Bi-Yagi Arrays With Photonic Band Gap

Abstract

Abstract-In this work, the analysis and design of wideband microstrip yagi and bi-yagi antenna arrays with photonic band gap (PBG) is presented. By using the bi-yagi planar array, a high directive gain and a high front-to-back ratio are achieved in comparison with that of the single microstrip yagi structure. The current distribution, return loss, radiation pattern, and input impedance are calculated. For a single yagi, wide bandwidth up to 12.81% at 10.15 GHz is obtained. However, a high directive gain is achieved with the bi-yagi. The PBG structures force the antennas to have stop band at the higher end of the operating band. In addition, it increases the front-to back (F/B) ratio. The finite difference time domain (FDTD) with the perfect matched (PML) and a numerical package based on the method of moment (MOM) are used in the present analysis and design. A closed form based on an approximate equivalent circuit is used to get approximate dimensions of the PBG structures.

A novel FDTD/WP-PML/NUFFT algorithm applied to the design of a printed metamaterial enhanced antenna

“…In [22] the use of anisotropic zerorefractive-index metamaterials (AZIM) elements in a lens horn antenna reduced the beamwidth of the E-plane and H-plane patterns and improved the gain of the lens horn antenna by 1.6 dB relative to its conventional counterpart with identical aperture. In this work the use of CLL metamaterial cells in replacement of the directors of a conventional printed bi-Yagi antenna [16] were used with success to increase its bandwidth and directivity and reduce its total length from 170 mm to 150 mm.…”

“…In fact, the metamaterial pattern is applied to physical devices aiming to obtain specific responses, like more gain and bandwidth, tune the microwave device at a certain frequency or just impose a rejection region. Several works in recent years have applied the metamaterial technology in different applications, like antennas [13][14][15][16][17][18][19], lens [20][21][22], among others [23,24]. In [14], a Complementary Split Ring Resonator (CSRR) structure is employed to a UWB antenna in order to provide a rejection characteristic in a desired frequency.…”

The design and application of the tripole array metamaterial unitary cell

“…On the other hand, in Ref. [3] metamaterial structures are applied to an UHF antenna and a better gain is obtained, while in Ref. [4] the periodic is structures are applied to the septum of a GTEM -Gigahertz Transverse Electromagnetic chamber, expecting a shift on the resonance frequencies.…”

“…Multiwavelength erbium-doped fiber lasers (EDFLs) have attracted a lot of attention in fields such as fiber communications, optical sensors, optical detection, spectrum analysis, and nonlinear optics because of their significant advantages such as flexible tuning ability, narrow linewidth, compact structure, high signal-to-noise ratio, and long lifetime [1][2][3]. In recent years, some techniques have been reported to realize a multiwavelength fiber laser.…”