A Compact Quad-Band Bandpass Filter Based on Defected Microstrip Structure
-
Lei Chen
,
Xiao Yan Li
Abstract
A compact quad-band band-pass filter (BPF) based on stub loaded resonators (SLRs) with defected microstrip structure (DMS) is analyzed and designed in this paper. The proposed resonator is created by embedding DMS into the SLR and can achieve four narrow passbands. By employing the pseudointerdigital coupling structure between the two resonators, transmission zeros among each passband are generated to improve the passband selectivity and a high isolation is achieved. In order to validate its practicability, a prototype of a quad-band BPF centred at 1.57, 2.5, 4.3 and 5.2 GHz is designed and fabricated. The proposed filter is more compact due to the slow-wave characteristic of DMS. The simulated and measured results are in good agreement with each other. In addition, the DMS idea can be extended to the design of other microstrip passive devices.
Funding statement: This work was supported by the National Natural Science Foundation of China (NSFC) under Grant 61301071.
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© 2017 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- A Microwave Tunable Bandpass Filter for Liquid Crystal Applications
- Design of a Balun Bandpass Filter with Asymmetrical Coupled Microstrip Lines
- A Compact Coplanar Waveguide (CPW)-Fed Zeroth-Order Resonant Filter for Bandpass Applications
- A Compact Quad-Band Bandpass Filter Based on Defected Microstrip Structure
- Three Pole Wideband Waveguide Bandpass Filter using Split Ring Resonator Integrated Circular Fractal Shape
- Compact Dual-band Bandpass Filter Based on HMSIW and DS-CSRR
- High Selectivity Wideband Bandpass Filter Using Stub Loaded Resonator
- Narrow-Band Bandpass Filter for Wireless Communication System
- Design and Analysis of a Triple Stop-band Filter Using Ratioed Periodical Defected Microstrip Structure
- Design of Microstrip Lowpass Filter with Sharp Roll-off using Elliptical and Radial Resonators
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Articles in the same Issue
- Frontmatter
- A Microwave Tunable Bandpass Filter for Liquid Crystal Applications
- Design of a Balun Bandpass Filter with Asymmetrical Coupled Microstrip Lines
- A Compact Coplanar Waveguide (CPW)-Fed Zeroth-Order Resonant Filter for Bandpass Applications
- A Compact Quad-Band Bandpass Filter Based on Defected Microstrip Structure
- Three Pole Wideband Waveguide Bandpass Filter using Split Ring Resonator Integrated Circular Fractal Shape
- Compact Dual-band Bandpass Filter Based on HMSIW and DS-CSRR
- High Selectivity Wideband Bandpass Filter Using Stub Loaded Resonator
- Narrow-Band Bandpass Filter for Wireless Communication System
- Design and Analysis of a Triple Stop-band Filter Using Ratioed Periodical Defected Microstrip Structure
- Design of Microstrip Lowpass Filter with Sharp Roll-off using Elliptical and Radial Resonators
- A Compact Via-free Composite Right/Left Handed Low-pass Filter with Improved Selectivity
