Microwave Bandpass Filters for Wideband Communications (Hardcover)

Lei Zhu, Sheng Sun, Rui Li

  • 出版商: Wiley
  • 出版日期: 2012-02-28
  • 定價: $3,580
  • 售價: 9.5$3,401
  • 語言: 英文
  • 頁數: 240
  • 裝訂: Hardcover
  • ISBN: 0470876611
  • ISBN-13: 9780470876619
  • 相關分類: 微波工程 Microwave
  • 立即出貨 (庫存=1)

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商品描述

This book will appeal to scientists and engineers who are concerned with the design of microwave wideband devices and systems. For advanced (ultra)-wideband wireless systems, the necessity and design methodology of wideband filters will be discussed with reference to the inherent limitation in fractional bandwidth of classical bandpass filters. Besides the detailed working principles, a large number of design examples are demonstrated, which can be easily followed and modified by the readers to achieve their own desired specifications. Therefore, this book is of interest not only to students and researchers from academia, but also to design engineers in industry. With the help of complete design procedures and tabulated design parameters, even those with little filter design experience, will find this book to be a useful design guideline and reference, which can free them from tedious computer-aided full-wave electromagnetic simulations. Among different design proposals, wideband bandpass filters based on the multi-mode resonator have demonstrated many unparalleled attractive features, including a simple design methodology, compact size, low loss and good linearity in the wide passband, enhanced out-of-band rejection, and easy integration with other circuits/antennas. A conventional bandpass filter works under single dominant resonant modes of a few cascaded transmission line resonators and its operating bandwidth is widened via enhanced coupling between the adjacent resonators. However, this traditional approach needs an extremely high coupling degree of coupled-lines while producing a narrow upper stopband between the dominant and harmonic bands. As a sequence, the desired dominant passband is restricted to an extent less than 60% in fractional bandwidth. To circumvent these issues and break with the tradition, a filter based on the multiple resonant modes was initially introduced in 2000 by the first author of this book. Based on this novel concept, a new class of wideband filters with fractional bandwidths larger than 60% has been successfully developed so far. This book, presents and characterizes a variety of multi-mode resonators with stepped-impedance or loaded-stub configurations using the matured transmission line theory for development of advanced microwave wideband filters.

商品描述(中文翻譯)

這本書將吸引關注微波寬頻設備和系統設計的科學家和工程師。對於先進的(超)寬頻無線系統,將討論寬頻濾波器的必要性和設計方法,並參考傳統帶通濾波器的分數頻寬固有限制。除了詳細的工作原理外,還演示了大量的設計示例,讀者可以輕鬆地跟隨並修改以滿足自己的需求。因此,這本書不僅對學術界的學生和研究人員感興趣,也對工業設計工程師感興趣。通過完整的設計程序和表格化的設計參數,即使是沒有太多濾波器設計經驗的人,也會發現這本書是一個有用的設計指南和參考,可以使他們擺脫繁瑣的計算機輔助全波電磁模擬。在不同的設計方案中,基於多模共振器的寬頻帶通濾波器展示了許多無與倫比的吸引人特點,包括簡單的設計方法、小巧的尺寸、低損耗和寬通帶的良好線性度、增強的帶外抑制以及與其他電路/天線的易集成性。傳統的帶通濾波器通過幾個級聯傳輸線諧振器的單一主要諧振模式工作,其工作頻寬通過相鄰諧振器之間的增強耦合擴大。然而,這種傳統方法需要極高的耦合度,同時在主要和諧波帶之間產生一個狹窄的上止帶。因此,所需的主要通帶在分數頻寬上受到限制,不超過60%。為了解決這些問題並打破傳統,該書的第一作者於2000年首次引入了基於多諧振模式的濾波器。基於這個新概念,迄今已成功開發出一類分數頻寬大於60%的寬頻濾波器。本書介紹和表徵了一系列使用成熟的傳輸線理論開發先進微波寬頻濾波器的多模共振器,包括階梯阻抗或載入樁配置。