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In this paper, we describe the design of a high power amplifier at Ka band. To achieve the output power of more than 30dBm, at first we design a one-stage power amplifier, and then design a two-stage amplifier circuit through the directional coupler, and ultimately achieve 31dBm of output power. The design is based on GaN materials to build a physical model of the HEMT. The S-parameters are extracted...
Based on the behavioral theory of corporate finance perspective, this article takes the listed companies in 2008 as a sample, researched the equity financing preference on investment behavior. By regression analysis: the listed companies' equity financing preference and the financing size have significant influence on the investment behavior.
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