Results 251 to 260 of about 208,195 (300)

Antenna factor determination of a shielded standard loop antenna

2015 IEEE International Symposium on Electromagnetic Compatibility (EMC), 2015
Consideration of the measurement environment of loop antennas is of great importance since loop antennas for low frequency magnetic fields are mostly used under near field conditions. To do this in the right and entire way, the whole measurement set-up has to be taken into account.
N. Richter, A. Junge, A. Kullmer, A. Enders   +3 more
openaire   +1 more source

The Correction of Antenna Factor

2007 International Symposium on Electromagnetic Compatibility, 2007
The theoretical NSA values given by the standards are grounded on the assumption that transmit and receive antennas are infinitesimal dipole antennas which is inappropriate to measurements. That is. the assumption neglects: (1) antenna mutual coupling, (2) antenna factor variations versus height, and (3) differences between the H-plane directivities ...
null Li Jing, Zhou Kesheng, Wang Weilong, null Li Xiao   +3 more
openaire   +1 more source

Q-Factor Studies for Multiport Antennas

2021 15th European Conference on Antennas and Propagation (EuCAP), 2021
In this paper, we study the quality factor Q for multiport antennas. We demonstrate that determining the feeding signals of the ports has an essential role when aiming at minimizing the Q-factor. A simple example is used to illustrate the connection of the bandwidth and Q-factor.
Yla-Oijala, Pasi, Lehtovuori, Anu, Luomaniemi, Rasmus   +3 more
openaire   +2 more sources

Properly Applied Antenna Factors

IEEE Transactions on Electromagnetic Compatibility, 1986
If antenna factors are to be properly applied, then all power losses from the antenna to the receiver must be properly accounted for. This paper presents generally applicable mathematical characterizations of the antenna factor with which to properly account for all such losses.
openaire   +1 more source

Antenna factors of an off-resonant dipole antenna

2012 Conference on Precision electromagnetic Measurements, 2012
An off-resonant antenna, such as a shortened dipole is widely used in electromagnetic compatibility measurements due to compactness. The antenna factor of the shorten dipole antenna is ordinary calibrated by comparing that of the standard antenna. However, considerable errors are introduced by applying this method with an insufficient separation due to
openaire   +1 more source

Antenna Q-factor computation with FDTD method

11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005], 2005
In this work, we have developed a new method for the calculation of the antenna quality factor by using the numerical method FDTD. The results obtained with our method are compared with the analytical approach of McLean and Geyi. The results show good agreement between FDTD and Geyi formulation.
Collardey, Sylvain, Sharaiha, Ala, Mahdjoubi, Kouroch   +2 more
openaire   +2 more sources

Estimation of Antenna Factor of Wire Antenna as Emi Sensor

Journal of Electromagnetic Waves and Applications, 2002
The ratio of incident electric field at the surface of receiving antenna to the received voltage at the antenna terminal when terminated in 50 ohms load is known as the antenna factor. It is an important parameter of a sensor used for EMI measurements.
S. Ghosh, A. Chakrabarty, S. Sanyal
openaire   +1 more source

Determination of the antenna factor of microwave antennas using the antenna impedance measurement

2004 Asia-Pacific Radio Science Conference, 2004. Proceedings., 2005
A newly developed antenna calibration method, named the antenna impedance method, was examined on its applicability for various microwave antennas. In the experimental calibration, the antenna impedance was measured above a small-sized metal plate (1 m /spl times/ 1 m).
S. Tsushima, K. Fujii, A. Sugiura, Y. Matsumoto, Y. Yamanaka   +4 more
openaire   +1 more source

Modified "three antennas method" for determining the antenna factor (AF)

2003 IEEE International Symposium on Electromagnetic Compatibility, 2003. EMC '03., 2003
This paper addresses the adequacy of the measurement methodology of "three antennas method" of ANSI Standard C63.5. This method requires installing at least one of the three antennas under test, on two different heights i.e. transmission and receiving positions. Although it presents a unique AF for each antenna at its receiving or transmitting position.
A. Kazemipour, D. Allal, X. Begaud, F. Piquemal   +3 more
openaire   +1 more source

Antenna factors of half‐wavelength dipole antennas with roberts balun

Electronics and Communications in Japan (Part I: Communications), 1996
AbstractTo use antenna factors most effectively in either EMI measurement or the reference antenna method, the antenna factor is more accurately derived than the conventionally obtained value when a half‐wave resonant dipole antenna with Roberts balun (ANSI C63.5 Specification) is placed on the ground plane.
Ki‐Chai Kim, Shinobu Tokumaru
openaire   +1 more source