Determination of the Material Relative Permittivity in the UHF Band by Using T and Modified Ring Resonators
Journal Title: International Journal of Electronics and Telecommunications - Year 2016, Vol 62, Issue 2
Abstract
The complete methodology of designing T- and modified ring resonators in the UHF band are presented in the paper. On the basis of proposed algorithms, the dedicated software tool has been elaborated in order to determine material parameters of contemporary substrates. The program is implemented in the Mathcad environment and it includes the base of information on known materials used in electronic products. Also, test sample series for selected substrate materials (IS680, FR408, I-SPEED PCB ISOLA and A6-S LTCC FERRO) and operating frequencies from 1 GHz to 3 GHz are analyzed in details. The special test stand with a vector network analyzer has been applied in experiments. The obtained data of relative permittivity measurements and model calculations are described, discussed and concluded.
Authors and Affiliations
Piotr Jankowski-Mihułowicz, Wojciech Lichoń, Grzegorz Pitera, Mariusz Węglarski
Quadrature Mapping, Saleh’s Representation, and Memory Models
In the literature, Saleh’s description of the AM/AM and AM/PM conversions occurring in communication power amplifiers (PAs) is classified as a representation without memory. We show here that this view must be revised. T...
Method for Filling and Sharpening False Colour Layers of Dual Energy X-ray Images
An X-ray scanning and image processing have a vast range of applications in the security. An image of a content of some package being passed for example to an airplane or to the court house may help to figure out if the...
The Issue of Data Exchange in the UHF Band RFID System with an Semi-Passive Transponder
The article discusses the specifics of data exchange in the UHF band RFID systems using semi-passive transponders. In addition to the antenna and the RFID chip, there is also an additional source of energy (eg. battery)...
Hierarchical Fast Selection of Intraframe Prediction Mode in HEVC
In the new HEVC standard, there are 35 intraframe prediction modes. Therefore, real-time implementations need fast mode pre-selection to reduce the computational load of cost comparison for individual modes. In this pape...
StegHash: New Method for Information Hiding in Open Social Networks
In this paper a new method for information hiding in open social networks is introduced. The method, called StegHash, is based on the use of hashtags in various open social networks to connect multimedia files (like imag...