Papers by Keyword: Mixers

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Authors: Xia Li Sun, Qing Zhang, Shu Yan
Abstract: An active phase conjugation circuit of retrodirective array which can be used in UHF band (890-960MHz) has been designed. Circuit of the retrodirective array consists of filters, mixers, dividers and other microwave devices. In this paper, microstrip filters and mixers are primarily designed. Divided matching circuit will be designed appropriate on the basis of the antenna element. Filters consist of microstrip coupled lines to conform with microstrip antenna arrays; to suppress the effect of RF input signals to output transmitted signals, selecting the image-rejection mixers. Simulation results of ADS show that all of the designed active devices display good performances.
Authors: Jolanta B. Krolczyk, Stanisław Legutko
Abstract: Very large variety of constructions are among granular materials mixers. This is a result of different needs from industry. The paper presents the mixers available in industrial practice. Analysis of mixers construction has been performed and their applications have been specify.
Authors: Mattias Südow, Niklas Rorsman, Per Åke Nilsson, Herbert Zirath
Abstract: Planar microwave Schottky diodes on 4H-SiC have been designed, processed and measured. Different Schottky metals were tested to study the influence on the microwave performance. A maximum extrinsic cut-off frequency of 30.8GHz was achieved for a Tungsten/SiC-Schottky diode. The diode geometry dependence on both the cut-off frequency and the breakdown voltage was investigated. The breakdown voltage was found to be linearly dependent on the anode-cathode distance.
Authors: C. Fazi, Philip G. Neudeck
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