Results 241 to 250 of about 17,964 (305)

Modern health worries and exposure perceptions of individuals reporting varying levels of sensitivity to electromagnetic fields: results of two successive surveys. [PDF]

open access: yesFront Public Health
Ledent M   +9 more
europepmc   +1 more source

Spiral antennas and antenna arrays

2005 IEEE Antennas and Propagation Society International Symposium, 2005
The planar square-Archimedean spiral located at the center of a dipole has been demonstrated as a valuable passive antenna element in the upper MM-wave and THz regions between about 100 GHz and 2 THz (Bjarnason, E. et al., Appl. Phys. Lett., vol.85, p.3983, 2004).
R.M. Bilotta, E.B. Brown
openaire   +1 more source

Archimedean Spiral Antenna

IETE Journal of Research, 1970
Archimedean spiral is a broad band antenna. It belongs to the general class of antennas known as “Frequency independent antenna”.
K. K. Srivastava, I. Sreenivasiah
openaire   +1 more source

Coplanar spiral antenna

2011 IEEE International Symposium on Antennas and Propagation (APSURSI), 2011
A coplanar spiral antenna (CSAT) in free space is analyzed using the finite-difference time-domain method. It is found that the CSAT radiates a circularly polarized wave over a relatively wide frequency range (13%). The gain is found to be an approximately 4.8 dBi. Subsequently, a CSAT with a glass plate is investigated.
H. Nakano   +3 more
openaire   +1 more source

The spiral antenna

IRE International Convention Record, 2005
A simplified description of the radiation mechanism of the spiral antenna is given, and the effects of the various parameters on the characteristics of the cavity-backed Archimedian spiral are discussed. Experimental data illustrating the effect of cavity diameter, cavity depth, conductor loading, and spiral rate of growth are offered as design guides.
R. Bawer, J. Wolfe
openaire   +1 more source

Spiral microstrip antenna

2007 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference, 2007
This paper deals with a microstrip antenna that has a spiral geometry rectangular form. This antenna form is based on the analysis of a spiral monopole. Through such configuration, it is possible to obtain a wider bandwidth operation. In addition, a considerable bandwidth in this type of microstrip is verified.
Dinisio Raony Ribeiro   +4 more
openaire   +1 more source

Bow-Spiral Antenna

2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, 2019
The paper presents the bow-spiral antenna, a hydride design which integrates the geometry structure of an exponential bow-tie into an Archimedean spiral antenna in order to reduce its high input impedance.
Thi M. D. Tran, Marc Piette
openaire   +1 more source

Slot spiral antenna

IEEE Antennas and Propagation Magazine, 2001
When compared to printed cavity-backed spirals, slot spiral antennas offer the possibility of designs that are conformal and very thin. We discuss the physical characteristics of a cavity-backed slot spiral, as well as the associated infinite balun and termination designs.
J.L. Volakis   +2 more
openaire   +1 more source

Home - About - Disclaimer - Privacy