TY - JOUR
T1 - Novel Miniature Dual-Band Rat-Race Coupler with Arbitrary Power Division Ratios Using Differential Bridged-T Coils
AU - Lin, Yo Shen
AU - Liu, You Rong
AU - Chan, Chung Hsien
N1 - Publisher Copyright:
© 1963-2012 IEEE.
PY - 2021/1
Y1 - 2021/1
N2 - In this article, a novel miniature dual-band rat-race coupler design is proposed. The proposed dual-band rat-race coupler employs differential bridged-T coils (DBTCs) as building blocks such that a very compact circuit size and a dual-band response can be achieved at the same time. Especially, through the proposed dual-band design of DBTC, arbitrary power division ratios over the two operating bands can also be realized. Explicit design equations of the proposed dual-band rat-race coupler are presented, and practical limitations on the achievable frequency ratio, power division ratio, and bandwidth are thoroughly investigated. As design examples, two 2.45-/5.5-GHz dual-band rat-race couplers with 0-/0- and 3-/0-dB power division ratios for the two bands are implemented in a silicon-based integrated passive device process. Very compact circuit sizes of less than 4.4 mm × \,\, 3.1 mm as well as good measured performance are achieved. To the best of our knowledge, these are the smallest dual-band rat-race couplers ever reported.
AB - In this article, a novel miniature dual-band rat-race coupler design is proposed. The proposed dual-band rat-race coupler employs differential bridged-T coils (DBTCs) as building blocks such that a very compact circuit size and a dual-band response can be achieved at the same time. Especially, through the proposed dual-band design of DBTC, arbitrary power division ratios over the two operating bands can also be realized. Explicit design equations of the proposed dual-band rat-race coupler are presented, and practical limitations on the achievable frequency ratio, power division ratio, and bandwidth are thoroughly investigated. As design examples, two 2.45-/5.5-GHz dual-band rat-race couplers with 0-/0- and 3-/0-dB power division ratios for the two bands are implemented in a silicon-based integrated passive device process. Very compact circuit sizes of less than 4.4 mm × \,\, 3.1 mm as well as good measured performance are achieved. To the best of our knowledge, these are the smallest dual-band rat-race couplers ever reported.
KW - Bridged-T coil (BTC)
KW - differential bridged-T coil (DBTC)
KW - dual-band
KW - integrated passive device (IPD)
KW - rat-race coupler
KW - ring hybrid
UR - http://www.scopus.com/inward/record.url?scp=85098774911&partnerID=8YFLogxK
U2 - 10.1109/TMTT.2020.3035287
DO - 10.1109/TMTT.2020.3035287
M3 - 期刊論文
AN - SCOPUS:85098774911
SN - 0018-9480
VL - 69
SP - 590
EP - 602
JO - IEEE Transactions on Microwave Theory and Techniques
JF - IEEE Transactions on Microwave Theory and Techniques
IS - 1
M1 - 9259228
ER -