Design of Lowpass Filter and Lowpass-Highpass Diplexer with LTCC Technology
Keywords:
Coupled lines, Low-Temperature Cofired Ceramic (LTCC), Lowpass filter (LPF), LowpassHighpass Diplexer (LPD)Abstract
A compact lowpass filter (LPF) and a lowpasshighpass diplexer (LPD) with both sharp roll-off and wide stopband is presented in this paper. The proposed LPF is realized by cascading modified hairpin unit consisting of one U-shape stripline and one pair of offsetcoupled striplines with multilayer low-temperature cofired ceramic (LTCC) technology. The LPD is realized by shunting a lowpass filter and a highpass filter at a common junction to achieve all-reject in one port. Good agreement can be achieved by the simulated and measured results.
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References
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