Design of Novel Compact Quad-Band Bandpass Filter with High Selectivity
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Qingchun Cao
Abstract
This paper presents a compact quad-band bandpass filter. The filter is realized by multi-embedded stub-load resonators. By utilizing multi-embedded structure, the whole filter exhibits a compact size. And due to the multi-section stub-loaded lines, four passbands can be realized and the center frequency of the four passbands can be controlled individually to accommodate different communication protocols. Moreover, by using 0° degree feed structure, there are two transmission zeros locates at left and right side of a passband, which greatly enhance the selectivity. To validate the proposed idea, a quad-band bandpass filter, which operates at 2/2.7/3.45/4.55 GHz is implemented. The insertion loss is smaller than 2 dB and return loss is better than 10 dB. Good agreement between the predicted and measured results demonstrates the proposed idea.
References
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Articles in the same Issue
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Articles in the same Issue
- Frontmatter
- Research Articles
- Wide-Angle RCS Enhanced Tag Based on Dielectric Resonator – Lens Combination
- 4-Channel Tunable Optical Demultiplexer Based on Nonlinearity Phenomenon in 2D Resonant Cavity Photonic Crystals
- Near Zero Parameter Metamaterial Inspired Superstrate for Isolation Improvement in MIMO Wireless Application
- A Tri-band Angularly Stable Frequency Selective Surface with Controllable Resonances for EM Shielding
- Dual-Polarization and Low-Sidelobe Corrugated Rectangular Horn Antennas for Outdoor RCS Measurement
- Circularly Polarized Microstrip Antenna Using SLPD Electromagnetic Band Gap Structure
- Design of Novel Compact Quad-Band Bandpass Filter with High Selectivity
- Compact Ultra-Wide Upper Stopband Microstrip Dual-Band BPF Using Tapered and Octagonal Loop Resonators
- Modelling of Acoustic Wave Propagation Due to Partial Discharge and Its Detection and Localization in an Oil-Filled Distribution Transformer
- A 5.7 mW, UWB LNA for Wireless Applications Using Noise Canceling Technique in 90 nm CMOS
