Zobrazeno 1 - 10
of 206
pro vyhledávání: '"T. Kleine-Ostmann"'
Autor:
T. Harz, T. Kleine-Ostmann
Publikováno v:
Advances in Radio Science, Vol 19, Pp 215-220 (2022)
A functional 10×10 reflectarray antenna is developed for millimeter-waves. It has a gain of approximately 10 dBi and a continuous steering range from −30 to 30∘ in the horizontal plane. In this paper, the entire design process is explained, begi
Externí odkaz:
https://doaj.org/article/de5dcd686bc94ab3be34e3c80bbe0a58
Publikováno v:
Advances in Radio Science, Vol 18, Pp 1-5 (2020)
We introduce a new tunable reflectarray element for an operation frequency of 26 GHz in the k-band. It is shown that a 340∘ continuous tunning range of the reflected wave can be accomplished by using an aperture-coupled patch antenna with only on
Externí odkaz:
https://doaj.org/article/0a8a426c303b453098c4248369ff2ca7
Publikováno v:
Advances in Radio Science, Vol 17, Pp 35-44 (2019)
In an intercomparison organized within the framework of the German Calibration Service (Deutscher Kalibrierdienst – DKD), seven different calibration laboratories participated in the measurement of the antenna factor for three different antennas ac
Externí odkaz:
https://doaj.org/article/52174277f7bf4e148d283f775931198d
Publikováno v:
Advances in Radio Science, Vol 17, Pp 45-49 (2019)
An intercomparison in the framework of the German Calibration Service (Deutscher Kalibrierdienst – DKD) was carried out. Two different travelling standards were used to measure the 10 % to 90 % rise time of a pulse generator and the 10 % to 9
Externí odkaz:
https://doaj.org/article/41407d3b44c64c15ba76006ea9b7b279
Autor:
T. Schrader, J. Bredemeyer, M. Mihalachi, D. Ulm, T. Kleine-Ostmann, C. Stupperich, S. Sandmann, H. Garbe
Publikováno v:
Advances in Radio Science, Vol 17, Pp 1-10 (2019)
In this paper, we describe measurement results of the signal-in-space of very high frequency (VHF) omnidirectional range (VOR) facilities. In aviation VOR are used to display the current course of the aircraft in the cockpit. To understand the influe
Externí odkaz:
https://doaj.org/article/c2bcae6963da40c0a2416556e015aa66
Autor:
R. Pape, U. Karsten, F.-M. Lindner, F. Rittmann, J. von Freeden, T. Kleine-Ostmann, T. Schrader
Publikováno v:
Advances in Radio Science, Vol 15, Pp 243-248 (2017)
In this paper we discuss the results of an intercomparison for electric field strength measurements within the German Calibration Service (Deutscher Kalibrierdienst – DKD). The comparison has been carried out on the field strength value required
Externí odkaz:
https://doaj.org/article/bfa8235197684b1382b0f72442399ed8
Publikováno v:
Advances in Radio Science, Vol 15, Pp 207-213 (2017)
In this paper we describe the design of an exposure setup used to study possible non-thermal effects due to the exposure of human hematopoietic stem cells to GSM, UMTS and LTE mobile communication signals. The experiments are performed under fully
Externí odkaz:
https://doaj.org/article/0d91a67cfed444ada220ef08f67ea351
Autor:
T. Kleine-Ostmann, F. Huncke, D. Schwarzbeck, O. Martetschläger, J. Gaßner, A. Guserle, C. Römer, T. Hufnagel, M. Lehmann, U. Karsten, T. Schrader
Publikováno v:
Advances in Radio Science, Vol 14, Pp 11-16 (2016)
In this paper we discuss the results of an intercomparison for free space antenna factor measurements performed within the German Calibration Service (DKD). Three different types of antennas covering the frequency range from 30 MHz to 26.5 GHz have b
Externí odkaz:
https://doaj.org/article/3b417a34ae5b423c844fec44205e7dff
Publikováno v:
Advances in Radio Science, Vol 14, Pp 1-9 (2016)
Field strength or signal-in-space (SIS) measurements have been performed by using manned helicopters, aircrafts or from ground level using extendable masts. With the availability of unmanned aerial systems (UAS) such as multicopters a new versatile p
Externí odkaz:
https://doaj.org/article/095a9f31947c44389a7f0c0e486fcc35
Publikováno v:
Advances in Radio Science, Vol 11, Pp 7-14 (2013)
We present a traceable calibration of a specially designed horizontally polarised reference antenna with an omnidirectional pattern in the E-plane for the frequency range between 105 MHz and 120 MHz. This antenna is used as a validation tool for abso
Externí odkaz:
https://doaj.org/article/d244d20bd6b549a6bfbfe383d67740f0