Abstract-A novel method is proposed to
synthesize dual-band
bandpass filters (BPFs) from a prototype low-pass
filter. By implementing
successive frequency transformations and circuit
conversions,
a new filter topology is obtained which consists
of only admittance
inverters and series resonators, and is thereby
easy to be
realized by using conventional distributed
elements. A dual-band
BPF with center frequencies of 1.8 GHz and 2.4
GHz is designed
and fabricated using microstrip lines and stubs.
The simulated and
measured results showa good agreement and
validate the proposed
theory.
Index Terms-Admittance inverter, dual-band filter,
frequency
transformation, microstrip line.
・
Synthesis of Dual-Band Bandpass
FiltersUsingSuccessive Frequency Transformations
and Circuit Conversions
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