─ Normal mode helical antennas are widely used for RFID and mobile communications applications due to their relatively small size and omni-directional radiation pattern. However, their highly curved geometry can make the design and analysis of helical antennas that are part of larger complex structures quite difficult. A simplified model is proposed that replaces the curved helix with straight ...

Octafilar helical antenna (OFHA) is proposed for handheld ultra‐high‐frequency (UHF) radio frequency identification (RFID) reader. The investigated antenna configuration consists of OFHA placed on reader device in the presence of human hand model. The antenna is designed at UHF band centered at 915 MHz. The antenna return loss, axial ratio, gain, co‐polarized and cross...

High directive stacked multilayer and edge coupled planar microstrip patch antenna made from a single-layer helical resonating metamaterial superstrate has been investigated. Metamaterials are artificial materials whose properties not found in nature. These materials have negative permittivity and permeability and negative index of refraction over a frequency band. In this paper, an innovative ...

Helical antennas have been known for a long time, but the literature is overwhelmed with controversial information about their performance. We have systematically investigated helical antennas located above an infinite ground plane and obtained design curves. We have also observed that the shape and size of the ground conductor have influence on the helical antenna performance. By optimizing th...

Helical antennas have been widely used in a various useful applications, due to their low weight and low profile conformability, easy and cheap realization. Radiation properties of this antenna are examined both theoretically and experimentally. In this paper, an attempt has been made to investigate new helical antenna structure for Applications. CST MWS Software is used for the simulation and ...

This paper presents background information and experiment procedures for an antenna measurement laboratory course to be held in a new anechoic chamber at California Polytechnic State University. The lab consists of five experiments and one design project intended to give students practical experience with antenna measurement techniques and to creatively apply analytical skills to design, constr...

Helical antennas have been popular antenna configurations for various applications for its simple structure [9-10]. This paper describes the study on the best custom shape dielectric loaded helical antenna for Access Point WLAN IEEE 802.11 b/g 2.4 GHz to 2.48 GHz applications. This paper presents the investigation of a Novel helical antenna incorporated with Barium Strontium Titanate (BST). Met...

Helical antennas have been a popular antenna configuration for various applications for its simple structure. This work describes the study on a novel, custom-shaped dielectric loaded helical antenna incorporated on an advanced material, which is Barium Strontium Titanate (BST). This material, which presents the researcher with an advantage in size reduction due to its high relative permittivit...

The radiation characteristics of a monofilar spiral antenna excited through a helical wire are investigated using the method of moments. The spiral has a circumference of more than two wavelengths (2.3 , where is the wavelength at a test frequency of 6 GHz) to obtain a tilted beam. An input impedance of approximately 50 is realized by appropriately selecting the diameter and pitch angle of the ...