High Gain Antenna Miniaturization With Parasitic Lens

Abstract

The scenario of using a spatially distributed antenna for miniaturized applications is presented in this work. A model of lens antenna with a low profile, compact, and high focusing superstrate, which exquisitely combines the conventional lens and resonant cavity superstrates, is proposed. Based on this model, the parasitic lens superstrate is introduced with high performance and simple configuration. The parasitic lens includes a low dielectric substrate and high resonant parasitic elements. By manipulating the surface currents of parasitic elements concentrating at center region of superstrate, the focusing effect is obtained. A prototype of the parasitic lens antenna was implemented with the source and parasitic superstrate's lateral dimensions of 0.5λ 0 × 0.5λ 0 and λ 0 × λ 0 , respectively, and the profile of 0.54λ 0. The peak gain is 10 dBi, corresponding to the enhancement of 5 dB. The measured results perspicuously demonstrate the efficiency of the compact parasitic lens. INDEX TERMS Antenna miniaturization, compact, gain enhancement, high focusing, parasitic lens.

Design of miniaturized and high gain dielectric lens antenna

“…In Moreno et al, 13 a dual‐polarized antenna with large‐angle beam switching is constructed by a dielectric arc‐shaped material and two metal planes. In Dang and Seo, 14 a lens antenna is proposed, in which a parasitic lens is introduced to improve its radiation performance. However, the working principle of the substrate stacking to realize the electromagnetic focusing causes in a bulky size.…”

Miniaturized 5G Antenna With Enhanced Gain by Using Stacked Structure of Split-Ring Resonator Array and Magneto-Dielectric Composite Material

“…The same thing happened to Zheng in [9], which can produce a Vivaldi antenna that works at the UHF frequency at 900 MHz with dimensions of 0.15λ × 0.16λ and produces a gain of about -3 dBi. Several works of literature have suggested specific ways to reduce the dimensions of the antenna while increasing the gain, such as by adding an anisotropic metasurface [10], parasitic lens superstrate [11], defected ground plane and addition of EBG structure [12], use of SRR [13], and the use of barium hexaferrite as a magneto-dielectric material [14].…”

Analysis and design of liquid antenna

“…Also, a high-gain water antenna structure is proposed using the concept of generating multiple reflections with a dielectric superstrate layer and may be used for range of wireless applications. [55][56][57][58][59] The next section gives the basic design of antenna with tubed liquid as radiating element, along with its theoretical field analysis. Section 3 discusses the parametric analysis of water antenna, to obtain the finest design for best impedance and radiation results.…”