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Multimode HMSIW-Based Bandpass Filter with Improved Selectivity for Fifth-Generation (5G) RF Front-Ends.
Amjad Iqbal1, Jun Jiat Tiang1, Sew Kin Wong1
1Centre For Wireless Technology, Faculty of Engineering, Multimedia University, Cyberjaya 63100, Malaysia.
Sensors (Basel, Switzerland)
|December 23, 2020
Summary
This study introduces a novel half-mode substrate integrated waveguide (HMSIW) filter for wideband applications. The filter achieves excellent selectivity with multiple transmission zeros and low insertion loss, validated by simulation and experiment.
Area of Science:
- Electromagnetics and Microwave Engineering
- Planar Circuit Design
Background:
- Substrate Integrated Waveguide (SIW) technology offers a low-cost, high-performance solution for microwave circuits.
- Achieving wideband filtering with high selectivity and low insertion loss remains a challenge in planar circuit design.
Discussion:
- A third-order, semicircular half-mode substrate integrated waveguide (HMSIW) filter is theoretically, simulated, and experimentally analyzed.
- Wideband characteristics are achieved using a semicircular HMSIW cavity resonator.
- Multiple transmission zeros (TZs) are generated using a U-shaped slot and L-shaped open-circuited stubs to enhance out-of-band rejection and selectivity.
Key Insights:
- The proposed HMSIW filter exhibits wide fractional bandwidth and low insertion loss.
- Adjustable dimensions of the U-shaped slot and L-shaped stubs allow precise control over transmission zeros.
- Simulated results show excellent agreement with experimental measurements, validating the filter's performance.
Outlook:
- The planar structure of the HMSIW filter facilitates integration with existing planar wideband communication systems.
- Further research could explore miniaturization and multi-band operation of HMSIW filters.
- This work contributes to the advancement of efficient and selective filtering solutions for modern wireless communication.
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