TY - GEN
T1 - A dual-band bandpass filter using a dual-mode ring resonator with two short-circuited stubs
AU - Choi, Byung Chang
AU - Lee, Wu Seong
AU - Kim, Ha Chul
AU - Choi, Hyun Chul
PY - 2010
Y1 - 2010
N2 - In this paper, a high selective dual-band bandpass filter using a dual-mode ring resonator with angle perturbation and two short-circuited stubs is proposed. For dual-mode resonance, the ring resonator is directly connected with non-orthogonal feed-line via coupling capacitors. And two different short-circuited stubs are simultaneously placed at two corners along the symmetric plane of the ring resonator. These two stubs make it possible to provide a transmission zero near the lower second passband edge. The proposed dual-band filter was fabricated. As a result of measurement, it exhibits center frequency (fractional bandwidth) of 2.3 (15.8%) and 4.9 GHz (25.7%) with insertion loss of 0.74 dB and 0.56 dB, respectively. So, the proposed filter has attractive features of low insertion loss and wide bandwidth compared to other dual-band filters. Thus, it should be well suited not only for wideband WLAN applications but also for any other communication systems.
AB - In this paper, a high selective dual-band bandpass filter using a dual-mode ring resonator with angle perturbation and two short-circuited stubs is proposed. For dual-mode resonance, the ring resonator is directly connected with non-orthogonal feed-line via coupling capacitors. And two different short-circuited stubs are simultaneously placed at two corners along the symmetric plane of the ring resonator. These two stubs make it possible to provide a transmission zero near the lower second passband edge. The proposed dual-band filter was fabricated. As a result of measurement, it exhibits center frequency (fractional bandwidth) of 2.3 (15.8%) and 4.9 GHz (25.7%) with insertion loss of 0.74 dB and 0.56 dB, respectively. So, the proposed filter has attractive features of low insertion loss and wide bandwidth compared to other dual-band filters. Thus, it should be well suited not only for wideband WLAN applications but also for any other communication systems.
KW - Dual-mode ring resonator
KW - Low insertion loss
KW - Non-orthogonal feeding
KW - Sharp passband skirts
KW - Short-circuited stub
UR - http://www.scopus.com/inward/record.url?scp=78650144324&partnerID=8YFLogxK
U2 - 10.1109/MMW.2010.5605202
DO - 10.1109/MMW.2010.5605202
M3 - Conference contribution
AN - SCOPUS:78650144324
SN - 9781424472437
T3 - 2010 10th Mediterranean Microwave Symposium, MMS 2010
SP - 152
EP - 155
BT - 2010 10th Mediterranean Microwave Symposium, MMS 2010
T2 - 2010 10th Mediterranean Microwave Symposium, MMS 2010
Y2 - 25 August 2010 through 27 August 2010
ER -