Pattern Switchable Antenna System Using Inkjet-Printed Directional Bow-Tie for Bi-Direction Sensing Applications

Abstract

In this paper, we propose a paper-based pattern switchable antenna system using inkjet-printing technology for bi-direction sensor applications. The proposed antenna system is composed of two directional bow-tie antennas and a switching network. The switching network consists of a single-pole-double-throw (SPDT) switch and a balun element. A double-sided parallel-strip line (DSPSL) is employed to convert the unbalanced microstrip mode to the balanced strip mode. Two directional bow-tie antennas have different radiation patterns because of the different orientation of the reflectors and antennas. It is demonstrated from electromagnetic (EM) simulation and measurement that the radiation patterns of the proposed antenna are successfully switched by the SPDT switch.

Reconfigurable Radiation Pattern of Planar Antenna Using Metamaterial for 5G Applications

“…Thus, a directional radiation pattern in E-plane can be obtained. The directional antenna is preferred for beam switching capability [31]. The xy-plane is the azimuth plane (E-plane), while the zy-plane represents the elevation plane (H-plane) [22].…”

Competition between Direct Detection Mechanisms in Planar Bow-Tie Microwave Diodes on the Base of InAlAs/InGaAs/InAlAs Heterostructures

“…Later, the room-temperature zero-bias detection of wide-frequency-range electromagnetic radiation was demonstrated using asymmetrically shaped semiconductor structures, the so-called planar bow-tie microwave diodes with n-n + junctions in the narrowest part of the diode [ 23 ]. The symmetrical bow-tie configuration of the device is used in various applications; for example, this configuration is used in switchable antenna systems for bi-directional sensor applications [ 24 ], and it is used to control silicon-based dielectric nano-bow-tie dimers and to manipulate nanometer-scaled objects [ 25 ]. The principle of the operation of microwave bow-tie diodes is based on non-uniform carrier heating in a microwave electric field due to the broken geometrical symmetry of the diode, as well as the specific doping profile of the structure.…”

Design Strategies in the Pen-Printing Technique toward Elaborated Organic Electronics

“…Printed electronics constitute an emerging technology with potential applications in photovoltaics, transistors, displays, batteries, antennas, and sensors. − Recent attention has focused on the realization of low-cost large-area platforms for flexible and disposable devices. − High-resolution direct printing techniques are of particular interest as alternatives to conventional vacuum deposition and photolithographic patterning for the production of functional films such as electrodes, gate dielectrics, and semiconductor layers. Each of the various direct printing techniques, including microcontact printing, nano-imprinting, screen printing, drop-on-demand inkjet printing, and roll-to-roll printing, can be categorized as either a noncontact or contact printing method based on the printing procedure used. − In noncontact printing, the patterning process involves discharging the ink solution without making direct contact with the target surface. ,, Inkjet printing, aerosol-jet printing, spraying, and vapor-jet printing are included in this category. ,, However, these techniques are only suitable for certain printing applications because the jetting of the organic ink is highly sensitive to the patterning conditions, including temperature, viscosity, concentration, and humidity. − Furthermore, in noncontact printing, the patterning precision is often limited by the formation of satellites and tails, which degrades the electrical performance of the printed material and the reproducibility of the patterned devices. , Contact printing methods, in which materials are directly patterned on a target substrate using a transfer medium (e.g., a mold, stamp, or roll), have been developed as another technique for fabricating printed electronics. , These methods can afford patterns with greater patterning precision by the contact between the transfer medium and the target substrate, but they have low process rates and may damage the substrate surface. These drawbacks have prevented the commercial use of contact printing methods.…”

“…12−16 In noncontact printing, the patterning process involves discharging the ink solution without making direct contact with the target surface. 5,7,9 Inkjet printing, aerosol-jet printing, spraying, and vapor-jet printing are included in this category. 1,17,18 However, these techniques are only suitable for certain printing applications because the jetting of the organic ink is highly sensitive to the patterning conditions, including temperature, viscosity, concentration, and humidity.…”