Balanced Wideband/Dual-Band BPFs on a Hybrid Multimode Resonator With Intrinsic Common-Mode Rejection

In this paper, a class of balanced wideband and dual-band bandpass filters (BPFs) is proposed and designed on a hybrid multimode resonator. This resonator is composed of two distinctive kinds of transmission lines, i.e., microstrip line and slotline, so it is called a hybrid resonator. On one hand, the resonator itself has the common-mode (CM) rejection as an inherent property by virtue of the hybrid structure; on the other hand, the microstrip/slotline transitions for feeding are avoided because normal microstrip feeding schemes are valid via microstrip lines inside this resonator. As such, the proposed hybrid resonator is largely different from those in the existing balanced BPFs with intrinsic CM rejection. In the traditional one, the resonator is formed by a slotline and it is connected with microstrip/slotline transitions for differential-mode (DM) transmission and CM rejection. What is more valuable, the hybrid resonator can be easily constructed by replacing a portion of then microstrip line in the traditional microstrip resonator with the slotline. Thus, the diversity of the balanced wideband BPFs with intrinsic CM rejection can be extremely enhanced and the balanced dual-mode dual-band BPF can be successfully designed. Two different balanced BPFs under wideband and dual-band operations are finally designed and fabricated to support our theory.

[1]  Ke Wu,et al.  A joint field/circuit model of line-to-ring coupling structures and its application to the design of microstrip dual-mode filters and ring resonator circuits , 1999 .

[2]  Lei Zhu,et al.  A Novel Dual-Mode Dual-Band Bandpass Filter Based on a Single Ring Resonator , 2009, IEEE Microwave and Wireless Components Letters.

[3]  Quan Xue,et al.  Balanced Bandpass Filters Using Center-Loaded Half-Wavelength Resonators , 2010, IEEE Transactions on Microwave Theory and Techniques.

[4]  C.-I.G. Hsu,et al.  Balanced Dual-Band BPF With Stub-Loaded SIRs for Common-Mode Suppression , 2010, IEEE Microwave and Wireless Components Letters.

[5]  Jen-Tsai Kuo,et al.  New Miniaturized Dual-Mode Dual-Band Ring Resonator Bandpass Filter With Microwave $C$-Sections , 2010, IEEE Microwave and Wireless Components Letters.

[6]  Quan Xue,et al.  Dual-Band and Wide-Stopband Single-Band Balanced Bandpass Filters With High Selectivity and Common-Mode Suppression , 2010, IEEE Transactions on Microwave Theory and Techniques.

[7]  Quan Xue,et al.  Novel Balanced Dual-Band Bandpass Filter Using Coupled Stepped-Impedance Resonators , 2010, IEEE Microwave and Wireless Components Letters.

[8]  Chang-Hong Liang,et al.  Compact Microstrip Dual-Band Bandpass Filter Using a Novel Stub-Loaded Quad-Mode Resonator , 2013, IEEE Microwave and Wireless Components Letters.

[9]  Chen Miao,et al.  Compact and Sharp Skirts Microstrip Dual-Mode Dual-Band Bandpass Filter Using a Single Quadruple-Mode Resonator (QMR) , 2013, IEEE Transactions on Microwave Theory and Techniques.

[10]  Lei Zhu,et al.  Dual-Mode Dual-Band Bandpass Filters With Adjustable Frequency RatioUsing an Annular Ring Resonator , 2013, IEEE Microwave and Wireless Components Letters.

[11]  Jian-Xin Chen,et al.  Compact Low-Loss Wideband Differential Bandpass Filter With High Common-Mode Suppression , 2013, IEEE Microwave and Wireless Components Letters.

[12]  Young-Ho Cho,et al.  Design of Balanced Dual-Band Bandpass Filters Using Asymmetrical Coupled Lines , 2013, IEEE Transactions on Microwave Theory and Techniques.

[13]  Chang-Hong Liang,et al.  Shorted-Ended Stepped-Impedance Dual-Resonance Resonator and Its Application to Bandpass Filters , 2013, IEEE Transactions on Microwave Theory and Techniques.

[14]  Lin Li,et al.  Differential Wideband Bandpass Filters With Enhanced Common-Mode Suppression Using Internal Coupling Technique , 2014, IEEE Microwave and Wireless Components Letters.

[15]  Dong Chen,et al.  A Differential-Mode Wideband Bandpass Filter on Slotline Multi-Mode Resonator With Controllable Bandwidth , 2015, IEEE Microwave and Wireless Components Letters.

[16]  Javier Mata-Contreras,et al.  Ultra-Compact (80 ${\hbox{mm}}^{2}$) Differential-Mode Ultra-Wideband (UWB) Bandpass Filters With Common-Mode Noise Suppression , 2015, IEEE Transactions on Microwave Theory and Techniques.

[17]  Wei Kang,et al.  Dual-Band SIW Differential Bandpass Filter With Improved Common-Mode Suppression , 2015, IEEE Microwave and Wireless Components Letters.

[18]  Li Yang,et al.  Balanced Dual-Band Bandpass Filter With Multiple Transmission Zeros Using Doubly Short-Ended Resonator Coupled Line , 2015, IEEE Transactions on Microwave Theory and Techniques.

[19]  Lei Zhu,et al.  Wideband Differential Bandpass Filters on Multimode Slotline Resonator With Intrinsic Common-Mode Rejection , 2015, IEEE Transactions on Microwave Theory and Techniques.