A compact coupling controllable elliptical filter based on multilayer LTCC
Yeo, Kiat Seng
Boon, Chirn Chye
Lim, Wei Meng
Do, Manh Anh
Date of Issue2013
School of Electrical and Electronic Engineering
This paper presents a compact elliptical filter based on modified λ/4 resonators with separated electric and magnetic coupling paths. For the proposed second-order filters, transmission zero points are generated at either lower or upper stopband by controlling the relative coupling strength in the two paths of inter-stage resonators. Based on the topology and multilayer LTCC technology, a fourth-order bandpass filters operating at 5.2 GHz with a fractional bandwidth of 10% in 1.7 mm × 3 mm (0.0785λg × 0.1385λg) is designed and verified experimentally.
DRNTU::Engineering::Electrical and electronic engineering
Microwave and optical technology letters
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