Low-Profile Wideband Monopolar UHF Antennas for Integration Onto Vehicles and Helmets

A novel design of a low-profile wideband monopolar antenna is proposed with integration examples for vehicles and helmets. Initially, a monopolar antenna size is reduced by adding four symmetrical tapered slots on an edge-shorted patch. The antenna is first designed to be integrated onto a large flat ground plane that is applicable for vehicular installation. This design is later adapted for integration onto a helmet with a finite-curved ground plane, where the helmet material is included as part of the design. This study shows that a curved ground plane improves the radiation patterns at broadside and further reduces the antenna height. Both vehicle and helmet antennas have been optimized to operate in a wide frequency range from about 800-2300 MHz. These antennas radiate in a monopole-like pattern with vertical polarization and high radiation efficiency that makes them suitable for transmission applications. Good agreement between simulation and measurement is obtained, which ultimately validates the proposed design technique.

[1]  K.M. Luk,et al.  A wide-band monopolar wire-patch antenna for indoor base station applications , 2005, IEEE Antennas and Wireless Propagation Letters.

[2]  Ahmed A. Kishk,et al.  Low-profile patch-fed surface wave antenna with a monopole-like radiation pattern , 2007 .

[3]  Tayeb A. Denidni,et al.  A New Triple-Band Circular Ring Patch Antenna With Monopole-Like Radiation Pattern Using a Hybrid Technique , 2011, IEEE Transactions on Antennas and Propagation.

[4]  Nader Behdad,et al.  A Low-Profile, Vertically Polarized Ultrawideband Antenna With Monopole-Like Radiation Characteristics , 2015, IEEE Transactions on Antennas and Propagation.

[5]  J. Yamauchi,et al.  A Wideband Low-Profile Antenna Composed of a Conducting Body of Revolution and a Shorted Parasitic Ring , 2008, IEEE Transactions on Antennas and Propagation.

[6]  Christophe Fumeaux,et al.  Low-Profile Magnetic Loop Monopole Antenna Based on a Square Substrate-Integrated Cavity , 2015 .

[7]  N. Behdad,et al.  A Very Low-Profile, Omnidirectional, Ultrawideband Antenna , 2013, IEEE Antennas and Wireless Propagation Letters.

[8]  J-F. Zürcher,et al.  Tripod omnidirectional low profile antenna: A vertically polarized antenna with 90% bandwidth , 2013 .

[9]  David Herold,et al.  Lightweight, High-Bandwidth Conformal Antenna System for Ballistic Helmets , 2007, MILCOM 2007 - IEEE Military Communications Conference.

[10]  Bernard Jecko,et al.  New kind of microstrip antenna: the monopolar wire-patch antenna , 1994 .

[11]  A. Elsherbini,et al.  Very Low-Profile Top-Loaded UWB Coupled Sectorial Loops Antenna , 2011, IEEE Antennas and Wireless Propagation Letters.

[12]  T. Itoh,et al.  Infinite Wavelength Resonant Antennas With Monopolar Radiation Pattern Based on Periodic Structures , 2007, IEEE Transactions on Antennas and Propagation.

[13]  Anja K. Skrivervik,et al.  A Novel, Low-Profile, Vertically-Polarized UWB Antenna for WBAN , 2014, IEEE Transactions on Antennas and Propagation.

[14]  Toni Bjorninen,et al.  Low-Profile Head-Worn Antenna With a Monopole-Like Radiation Pattern , 2016, IEEE Antennas and Wireless Propagation Letters.

[15]  E. W. Seeley.  An experimental study of the disk-loaded folded monopole , 1956, IRE Transactions on Antennas and Propagation.

[16]  P. R. Foster,et al.  New kind of microstrip antenna: the monopolar wire patch antenna , 1994 .

[17]  Seyed Mohamad Amin Momeni Hasan Abadi,et al.  An Electrically Small, Vertically Polarized Ultrawideband Antenna With Monopole-Like Radiation Characteristics , 2014, IEEE Antennas and Wireless Propagation Letters.