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This letter proposed a novel miniaturization technique for surface-wave holographic antenna, which determines the layout of the antenna by simply cutting out the region where the scattering is inefficient from the original interference pattern. Then, the equivalent method of physical truncation and perfect magnetic conductor truncation is presented and theoretically analyzed to increase the gain and...
This paper presents a cognitive radio (CR) testbed based on the advanced geolocation engine (AGE) algorithms. Through simulations and experiments we have shown that among the three maximum allowed transmit power calculation methods specified by the electronic communications committee (ECC) Report 186, the “flexible minimized” calculation method allows the highest transmit power for the cognitive secondary...
A miniaturized balanced low noise amplifier for TD-SCDMA application is presented in this paper. Using the PHEMT devices, the proposed low noise amplifier with miniaturized quadrature hybrid coupler is designed in terms of stability and matched characteristics. Simulated by AWR MWO software, the amplifier is fabricated on a PTFE board. The compact quadrature hybrid coupler reduces the size of the...
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