Title :
A micromachined monolithic half coaxial transmission line filter
Author :
Llamas-Gano, I. ; Kim, Yongsung ; Chang-Wook Back ; Kim, Yong-Kweon
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Seoul Nat. Univ., South Korea
Abstract :
In this paper, we present the design and development of a micromachined monolithic half coaxial transmission line filter. The proposed transmission line has an air gap between conductors, to provide low propagation losses, while allowing the use of wide center conductors to reduce conductor losses. Additionally by using a quartz substrate, dielectric losses are minimized. Out of experimental resonators we have extracted an unloaded quality factor of 141. The transmission line is used in the design of a three pole, capacitively coupled bandpass filter, having a 5% fractional bandwidth and a center frequency of 31.75 GHz.
Keywords :
Q-factor; band-pass filters; high-frequency transmission lines; millimetre wave filters; network synthesis; resonator filters; 31.75 GHz; capacitively coupled bandpass filter; conductor loss reduction; dielectric loss minimization; half coaxial transmission line filter; low propagation losses; monolithic transmission line filter; quality factor; quartz substrate; wide center conductors; Band pass filters; Coaxial components; Conductors; Couplings; Dielectric losses; Dielectric substrates; Propagation losses; Q factor; Resonator filters; Transmission lines;
Conference_Titel :
Microwave Conference Proceedings, 2005. APMC 2005. Asia-Pacific Conference Proceedings
Print_ISBN :
0-7803-9433-X
DOI :
10.1109/APMC.2005.1606612
