Abstract
In this paper, a novel broadband balanced-to-balanced (BTB) filtering power divider (FPD) utilizing the half-mode substrate-integrated waveguide and spoof surface plasmon polariton (HMSIW-SSPP) hybrid transmission line is introduced. Initially, a new HMSIW-SSPP unit cell is proposed, demonstrating a lower upper cut-off frequency compared to the classical HMSIW-SSPP unit cell. Building upon this unit cell, a bandpass BTB FPD is devised employing dual-layer stacked substrates, enabling independent control over the passband’s lower and upper cut-off frequencies through specific physical dimensions. Additionally, the incorporation of isolation resistors and defected ground structures in the BTB FPD enhances differential-mode isolation and common-mode (CM) suppression between output ports. A manufactured and tested BTB FPD prototype validates this design method, showcasing a broad fractional bandwidth of 52.31% (6.72–11.48 GHz), output port isolation surpassing 14.25 dB, and transmitted CM suppression exceeding 34.05 dB.
Original language | English |
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Article number | 358 |
Number of pages | 12 |
Journal | Micromachines |
Volume | 15 |
Issue number | 3 |
DOIs | |
Publication status | Published - Mar 2024 |
MoE publication type | A1 Journal article-refereed |
Keywords
- balanced-to-balanced structure
- broadband
- filtering power divider
- half-mode substrate-integrated waveguide
- spoof surface plasmon polariton