Zobrazeno 1 - 10
of 68
pro vyhledávání: '"H. Eul"'
Publikováno v:
Advances in Radio Science, Vol 6, Pp 19-25 (2008)
The scattering parameters of embedded devices can be measured by means of contactless vector network analysis. To achieve accurate measurement results, the contactless measurement setup has to be calibrated. However, if the substrate material or the
Externí odkaz:
https://doaj.org/article/2840d98614ec454e897700e83270d132
Publikováno v:
Advances in Radio Science, Vol 5, Pp 115-118 (2007)
This paper shows a new method to determine the input impedance of RFID transponder antennas with a combination of on-wafer-prober and network analyzer. It is shown that the results are in a good agreement with FEM simulations (HFSS) for a large part
Externí odkaz:
https://doaj.org/article/d6e89e28e8ba4daa8e2ea4c9429bd3d1
Publikováno v:
Advances in Radio Science, Vol 5, Pp 127-133 (2007)
The computer aided design process of sophisticated UHF-RFID transponder antennas requires the application of reliable simulation software. This paper describes a Matlab implemented extension of the post processor capabilities of the commercially avai
Externí odkaz:
https://doaj.org/article/758cb85866364ffb9a5a42eb992ead37
Publikováno v:
Advances in Radio Science, Vol 5, Pp 19-28 (2007)
Contactless vector network analysis based on a diversity calibration is investigated for the measurement of embedded devices in planar circuits. Conventional contactless measurement systems based on two probes for each measurement port have the disad
Externí odkaz:
https://doaj.org/article/022c02240fb94191a53eedf3bcb1f7fb
Publikováno v:
Advances in Radio Science, Vol 5, Pp 265-271 (2007)
As a tradeoff between efficiency and costs mbox{modern} communication systems contain a variety of components that can at least be considered weakly nonlinear. A critical element in evaluating the degree of nonlinearity of any underlying nonlinear sy
Externí odkaz:
https://doaj.org/article/aaf7ca0aa39c4ce4ba3b8dd17f1634ed
Publikováno v:
Advances in Radio Science, Vol 5, Pp 427-434 (2007)
In this paper, a contactless measuring system for the determination of the S-parameters of planar circuits is presented. With a contactless measuring system it is possible to characterise a device-under-test (DUT) embedded in a planar circuit environ
Externí odkaz:
https://doaj.org/article/8f9db5555dbf42c899111fd5bc82884d
Publikováno v:
Advances in Radio Science, Vol 5, Pp 87-94 (2007)
The claim for multistandard operating handsets of small physical size as well as the ever increasing demand for higher data rates require new broadband operating antennas. Because of the widespread use of especially planar broadband antennas a lot of
Externí odkaz:
https://doaj.org/article/9502a559f1ff4fad89ab6fdf0d721487
Publikováno v:
Advances in Radio Science, Vol 4, Pp 93-98 (2006)
RFID Systeme werden seit Anfang der neunziger Jahre mit stetig zunehmender Verbreitung im Bereich der automatischen Produktidentifikation, der Diebstahlsicherung (EAS, Electronic Article Surveillance) und für automatische Zutrittskontrollsysteme ein
Externí odkaz:
https://doaj.org/article/87b580deda54406c9e372905f4027cab
Publikováno v:
Advances in Radio Science, Vol 4, Pp 25-32 (2006)
Deployment in the design of mobile radio terminals focuses on the implementation of multiradio transmission systems, using a multiplicity of different radio standards combined with high-speed data communication over multiple-input multiple-output (MI
Externí odkaz:
https://doaj.org/article/9dcb726726584b25a65f4714dae58450
Publikováno v:
Advances in Radio Science, Vol 4, Pp 33-39 (2006)
In order to satisfy the stringent demand for an accurate prediction of MIMO channel capacity and diversity performance in wireless communications, more effective and suitable models that account for real antenna radiation behavior have to be taken in
Externí odkaz:
https://doaj.org/article/0991d6bcbbbb4e31a0f54b545afea8b1