Communication In The Broadband Filter

With the radio, antenna and the rapid development of microelectronics technology, especially in low-cost, high processing and high sampling rate VLSI very large scale integrated chip breakthrough, making the popularity of ultra-wideband wireless communications into possible. In order to meet the rapid development of ultra-wideband technology, developed excellent performance, reliable structure ultra-wideband devices have gradually become a hot academic circles at home and abroad. Ultra-wideband filter as one of the key components of wideband system, scholars from various countries give it much concern and Ultra-wideband filter obtained rapid development.In this paper, based on classic ultra-wideband filter structure, we sum up three types ultra-wideband filters and structures of each implementation method. After the filter synthesis basing on the classical theory of broadband, combined with today's symbolic calculation software, we derive a new type of broadband filter design formulas and apply the formula design, simulate and process out of two broadband filters, verifying the practicality of formula and correctness of the design steps. According to the different bandwidth range, we give the different forms to expand the application scope of the formula and for each realization we give the non-planar structure. Finally, we sum up each chapter and prospect the area needed in-depth explore.