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For some applications the use of metal backed substrates is advantageous. The solid backside-metallization provides a good heatsink and gives the possibility to produce MMIC-cavities by milling. However, the circuit design is bounded to one layer, and therefore the choice of suitable waveguide transitions is limited. Especially if right-angle transitions are needed, no structures are known to the...
We previously proposed a new coaxial-slot antenna of not whole conductor needle but one sandwiched dielectric between conductors for cancer therapy. The heating of the antenna was possessed of suppressed extension in the direction of the tip compared with that of the antenna of whole conductor needle, as a result of the experiment of liver phantom In this paper, we calculate the heating characteristics...
We propose the use of inverse scattering for the design of filters, in microstrip technology, with a specified reflective group delay response. The inverse scattering is performed using the layer peeling algorithm. The method is simple and easily implemented numerically. To validate the method, filters with a reflective linear group delay were designed and implemented. The simulation and measurement...
This investigation examines the combined effect of magnetic iron oxide nanoparticles (6.5 nm) and 2.45 GHz microwave radiation. Male Swiss albino mice (7 week old) were intra-peritoneally administered different doses of magnetic iron oxide nanoparticles and were exposed to 2.45 GHz microwave radiation for 30 days. Antioxidative enzyme activity was measured in the liver and brain cells. As measured...
This paper presents an experimental study on the microwave detection of spherical dielectric bodies exhibiting varying complex permittivity from the embedding lossy dielectric medium, simulating malignant tumors of different dielectric contrast from normal biological tissue. Measurements are performed using a flanged parallel-plate dielectric waveguide probe (PPDW) on phantom materials. Preliminary...
Requirements to an antenna for thermal spot detection by a microwave radiometer are analyzed. A parasitic rectangular patch antenna has been designed and measured showing to meet the requirements.
This paper proposes a method that combines a data-independent beamformer with Matrix Pencil (MP) method to take into consideration the morphological properties of the malignant tissue. The simulated results have shown the resonant frequency and damping factor of complex natural resonance (CNR) are capable of differentiating the malignant tissue from other significant interferers such as benign lesions...
The stress evaluation is of importance for prior prevention of stress-related illnesses. We report here on an evaluation method of the stress using a microwave reflectometer which has the features of non-contact and non-invasive method.
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