Design of Balanced Filter with Wide Stopband by Using Discriminating Coupling
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Qingchun Cao
Abstract
This paper presents a novel balanced filter with enhanced stopband by using discriminating coupling. The proposed design utilizes third-order quarter-wavelength coupled resonators to obtain the filtering responses. Discriminating coupling is applied between feedline and resonator. The circuit is theoretically analyzed and implemented for demonstration. The operating frequency is located at 2.4 GHz and the common-mode rejection is larger than 20 dB up to 9 GHz (3.75f0). Due to discriminating coupling, the differential mode out-of-band rejection is larger than 20 dB up to 18 GHz (7.5f0), which shows wide stopband.
Acknowledgements
This work was supported by National Natural Science Foundation of China (No. 61705069 and No. 61605047) and partly by Natural Science Foundation of Guangdong Province, China (No. 2016A030313438).
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- Wideband High Gain Cylindrical Dielectric Resonator Antenna for X-Band Applications
- Design of Balanced Filter with Wide Stopband by Using Discriminating Coupling
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Articles in the same Issue
- Frontmatter
- Research Articles
- Reconfigurable Graphene Circular Polarization Reflectarray/Transmitarray Antenna
- A Design of the Beam-Adjustable Metasurface Based on the Plasma Metamaterial with the Dielectric Matching Layers
- Hexagonal Nested Loop Fractal Antenna for Quad Band Wireless Applications
- Wideband High Gain Cylindrical Dielectric Resonator Antenna for X-Band Applications
- Design of Balanced Filter with Wide Stopband by Using Discriminating Coupling
- Development of Multistage Digital Filters for Dither Signal Removal in Ring Laser Gyro
- Device-to-Device Radio Link Analysis at 2.4, 3.4, 5.2, 28 and 60 GHz in Indoor Communication Environments
- Inverse Scattering Related to Cylindrical Bodies Buried in a Lossy Circular Cylinder with Resistive Boundary
