Gain enhancement methods for printed circuit antennas

TL;DR: In this article, a small antenna formed by a periodic assembly of two-tone dielectrics emulating an anisotropic medium is presented, which achieves a directivity of 10.17 dBi when operated close to the band edge frequencies of a class of photonic crystals supporting degenerate band edge (DBE) modes.

TL;DR: In this article, a differentially fed circular patch antenna working in TM11 and TM12 modes is proposed for dual-band high-gain and stable radiation patterns, where a set of shorting pins are loaded in circular contours underneath the circular patch to substantially increase the resonant frequency of TM11 mode and the radiation gain in lower band can be hence effectively enhanced due to the enlarged patch size at resonance.

TL;DR: In this paper, a dual-slot feeding technique is proposed for broadband multi-layer periodic Fabry-Perot cavity (FPC) antennas achieving enhanced directivity as well as broadband radiation and matching performance.

TL;DR: In this article, an approximate analysis based on a homogenized model for the wire medium as well as a rigorous full-wave analysis of the actual periodic structure of a grounded wire medium slab excited by a simple canonical source is presented.

TL;DR: In this paper, an introduction history classification of leaky wave antennas is presented, along with a detailed discussion of the physics of Leaky Waves Radiation properties of one-dimensional and two-dimensional Leaky wave antenna.

TL;DR: This paper gives a basic review and a summary of recent developments for leaky-wave antennas (LWAs), a guiding structure that supports wave propagation along the length of the structure, with the wave radiating or “leaking” continuously along the structure.

TL;DR: In this article, a ray analysis is employed in order to give physical insight into the performance of AMCs and derive design guidelines, and the bandwidth and center frequency of AMC surfaces are investigated using full-wave analysis and the qualitative predictions of the ray model are validated.

TL;DR: In this article, the authors proposed a reactive impedance surface (RIS) as a substrate for planar antennas that can miniaturize the size and significantly enhance both the bandwidth and the radiation characteristics of an antenna.