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This paper presents practical design of a three port feed network for a dual-band and dual-polarized patch antenna operating at 1.9 GHZ and 2.4 GHz. Initially, design graphs are used to determine the dimensions of the patch for dual band application and the component values of the two equivalent parallel tuned circuits of the antenna at each frequency. Finally the predicted and practical results are...
A detailed design of class-F power-amplifier with a load harmonic network for third harmonic peaking is presented where initially ideal lossless transmission lines and then microstrip lines with losses are used. When the load network is realized using microstrip lines the effect of discontinuities is taken into account. For a network with ideal transmission lines, a 3Ω resistor is used in series with...
This article presents an original method of materials characterization. Our method is used for broad-band (30 MHz-6 GHz) determination of the complex dielectric permittivity of powder materials. This technique is based on the measurement of S parameters of two microstrip lines partially loaded with micrometric powder of silicon carbide (SiC). The results exhibit a good agreement with the very few...
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