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In this publication the impact of the dipole size and its groundplane on the half power beamwidth of a dual polarized dipole is analyzed in detail. The frequency band of observation is from 1700MHz to 2700 MHz, covering the UMTS and LTE communication bands. This bandwidth is chosen to show the broadband effects on the scattering parameters as well as on the radiation patterns. For the radiation behavior...
In this contribution we derive the transfer function of a typical RFID channel as defined in ISO 14443. RFID is common technology and has applications in various contexts such as keyless entry and logistics. In the following the principle of such a system is briefly outlined and an equivalent circuit is introduced. The transfer function itself is derived via a state space model approach which are...
Strategies and results for calibrating electric field sensors (antennas), as used in radio astronomy, onboard the spacecraft “Resonance” are presented. Calibration is performed for four boom antennas and four cylindrical sensors at the boom tips. These antennas are devised for the measurement of electric fields and plasma parameters. It is shown that the electrical representations of the antennas,...
Waves is the radio and plasma wave instrument onboard NASA's spacecraft JUNO. The instrument utilizes an electrically short dipole antenna for the measurement of electromagnetic field parameters. The instrument is devised for frequencies from 50 Hz up to 40 MHz. Waves antenna system properties are distorted because the highly conducting spacecraft body is in close vicinity of the antennas. In addition...
We report on the calibration effort for the monopole antennas onboard the Resonance spacecraft. The calibration is performed for four boom antennas and four cylindrical sensors at the boom tips. These antennas are devised for the measurement of electrical fields and plasma parameters. We apply two methods for the antenna analysis: first, electrolytic tank measurements (rheometry), which is a method...
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