Center Frequency and Bandwidth Controllable Microstrip Bandpass Filter Design Using Loop-Shaped Dual-Mode Resonator

Autor:	Nan-Wei Chen, Shyh-Kang Jeng, Hsuan-Ju Tsai
Rok vydání:	2013
Předmět:	Engineering Radiation business.industry Low-pass filter Bandwidth (signal processing) Condensed Matter Physics Resonator Band-pass filter Electronic engineering Prototype filter Electrical and Electronic Engineering Center frequency business High-pass filter Passband
Zdroj:	IEEE Transactions on Microwave Theory and Techniques. 61:3590-3600
ISSN:	1557-9670 0018-9480
DOI:	10.1109/tmtt.2013.2280129
Popis:	A design approach for developing microwave bandpass filters (BPFs) with continuous control of the center frequency and bandwidth is presented. The proposed approach exploits a simple loop-shaped dual-mode resonator that is tapped and perturbed with varactor diodes to realize center frequency tunability and passband reconfigurabilty. The even- and odd-mode resonances of the resonator can be predominately controlled via the incorporated varactors, and the passband response reconfiguration is obtained with the proposed tunable external coupling mechanism, which resolves the return losses degradation attributed to conventional fixed external coupling mechanisms. The demonstrated approach leads to a relatively simple synthesis of the microwave BPF with an up to 33% center frequency tuning range, an excellent bandwidth tuning capability, as well as a high filter response reconfigurability, including an all-reject response.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2beda5d14b101c1e8ea9b89ab63f9fbd https://doi.org/10.1109/tmtt.2013.2280129 Zobrazit plný text záznamu