Microwave Bandpass Filters for Wideband Communications

Microwave Bandpass Filters for Wideband Communications

👓 Rui Li
Microwave Bandpass Filters for Wideband Communications

Microwave Bandpass Filters for Wideband Communications

✅ 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 circuitsantennas. 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 6️⃣0️⃣% in fractional bandwidth. To circumvent these issues and ➕ break 💔 with the tradition, a filter based on the multiple resonant modes 📳 was initially introduced in 2️⃣0️⃣0️⃣0️⃣ by the first 🥇 author of this book 📚️. Based on this novel concept, a new 🆕 class of wideband filters with fractional bandwidths larger than 6️⃣0️⃣% 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.



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