TY - GEN
T1 - Compact 4-pole BRF-based directional filter with even-mode matching circuit for sharp cut-off
AU - Sun, Jim S.
AU - Corona-Chavez, Alonso
AU - Choi, Jun
AU - Itoh, Tatsuo
PY - 2013
Y1 - 2013
N2 - The directional filter structure using λ/2 strip resonators with better filtering performance has been the focus of recent research activities. The band-reject filter based directional filter structure has been demonstrated as an effective way to achieve this goal. However, the prototype reported is cascading resonators in the lateral direction. When the order of the filer gets higher, the lateral cascading leads to rapid oscillation in the stop-band of S41 and a lengthy structure. This paper demonstrated a 4-pole band-reject filter based DF using direct-coupled band-reject filter. It achieves the highest order of DF response reported without the rapid oscillation in the stop-band. Yet it is about 30% smaller compared to previous 3-pole directional filter prototypes.
AB - The directional filter structure using λ/2 strip resonators with better filtering performance has been the focus of recent research activities. The band-reject filter based directional filter structure has been demonstrated as an effective way to achieve this goal. However, the prototype reported is cascading resonators in the lateral direction. When the order of the filer gets higher, the lateral cascading leads to rapid oscillation in the stop-band of S41 and a lengthy structure. This paper demonstrated a 4-pole band-reject filter based DF using direct-coupled band-reject filter. It achieves the highest order of DF response reported without the rapid oscillation in the stop-band. Yet it is about 30% smaller compared to previous 3-pole directional filter prototypes.
KW - Band-reject filter
KW - Band-stop filter
KW - Compact directional filter
KW - Directional filter
KW - Multistage directional filter
UR - http://www.scopus.com/inward/record.url?scp=84893215973&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84893215973&partnerID=8YFLogxK
U2 - 10.1109/MWSYM.2013.6697604
DO - 10.1109/MWSYM.2013.6697604
M3 - Conference contribution
AN - SCOPUS:84893215973
SN - 9781467361767
T3 - IEEE MTT-S International Microwave Symposium Digest
BT - 2013 IEEE MTT-S International Microwave Symposium Digest, MTT 2013
T2 - 2013 IEEE MTT-S International Microwave Symposium Digest, MTT 2013
Y2 - 2 June 2013 through 7 June 2013
ER -