Title
Compact SIDGS Filtering Power Divider With Three-Port 10-GHz Reflectionless Range
Abstract
In this brief, a compact high isolation filtering power divider (FPD) with wide stopband and wide-band three-port reflectionless operation is proposed. Such FPD consists of a trigonometric substrate-integrated defected ground structure (SIDGS) based resonator and three absorptive networks. The good stopband performance is achieved by using the trigonometric SIDGS. Meanwhile, the absorptive networks based on common-gate topology capable of absorbing the out-of-band reflected signals are connected to the SIDGS resonator, which provides the wideband reflectionless operation in all three ports of the FPD. To verify the mechanisms mentioned above, a FPD operated at 2.10 GHz (i.e., <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\boldsymbol {f_{0}}$ </tex-math></inline-formula> ) is fabricated, which exhibits a 42 dB stopband rejection level up to 20 GHz (i.e., <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$9.5\boldsymbol {f_{0}}$ </tex-math></inline-formula> ). The measured reflectionless range with return loss lower than −10 dB is up to 10 GHz in all three ports. The core size of the FPD is about <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$0.36\,\,\boldsymbol {\lambda _{g}} \times 0.38\,\,\boldsymbol {\lambda _{g}}$ </tex-math></inline-formula> , where <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\boldsymbol {\lambda _{g}}$ </tex-math></inline-formula> is the microstrip guided wavelength at the center frequency.
Year
DOI
Venue
2022
10.1109/TCSII.2022.3165848
IEEE Transactions on Circuits and Systems II: Express Briefs
Keywords
DocType
Volume
Filtering power divider,high isolation,reflectionless,substrate-integrated defected ground structure (SIDGS),wide stopband
Journal
69
Issue
ISSN
Citations 
7
1549-7747
0
PageRank 
References 
Authors
0.34
11
5
Name
Order
Citations
PageRank
Qingxian Li100.34
Hongxin Tang200.34
Deshan Tang300.68
Zhixian Deng401.35
Xun Luo51410.67