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Four-Way Spoof Surface Plasmon Polaritons Splitter/Combiner
摘要： Corrugated metal with period grooves supports spoof surface plasmons polariton (SSPP) wave in microwave and terahertz ranges. In this letter, a four-way SSPP splitter/combiner with oval-ring periodic structures is presented by using a single connection junction. Up to the authors’ best knowledge, a four-way SSPP splitter/combiner is never reported in the literature. In order to verify the performance of the mentioned SSPP splitter/combiner, we have manufactured and tested the presented SSPP splitter/combiner. The simulation and measurement results demonstrate that the designed conversion between a single coplanar waveguide junction and four SSPP waveguides is high efficiency. The SSPP splitter equally separates the electromagnetic wave into four paths. Hence, the proposed four-way splitter is expected to develop the SSPP active and passive components and relative integrated circuits.
关键词： spoof surface plasmon polariton (SSPP),four-way splitter/combiner,Coplanar waveguide (CPW)
更新于2025-09-23 15:23:52
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[IEEE 2018 International Conference on Current Trends towards Converging Technologies (ICCTCT) - Coimbatore (2018.3.1-2018.3.3)] 2018 International Conference on Current Trends towards Converging Technologies (ICCTCT) - Broadband Circularly Polarized U-Slot Antenna for Wireless Application
摘要： The antenna presented in this paper is a broadband circularly polarized U slot antenna. The circularly polarized radiation is achieved in this paper by suspending two separated rectangular strips from the inner edge of ground and using inverted L-shaped central feeding stub. The L-shaped stub is oriented at 90 degree with respect to grounded strips. The impedance bandwidth of the antenna proposed here varies from (4.68 - 6.42 GHz) which is 31.3% and the axial ratio bandwidth (<3 dB) is from (5.15-6.45 GHz) which is 22.4% for WLAN (ranging from 5.15 to 5.85 GHz) and WIMAX (5.8GHz,5.5 GHz) applications. The antenna is left and right hand circularly polarized in Z>0 and Z<0 directions respectively. A wide notch is cut from the ground which enhances the ARBW by 51.35% in comparison to simple square shaped ground. All the results have been simulated successfully.
关键词： circular polarization (CP),axial ratio bandwidth (ARBW),slot antenna,coplanar waveguide (CPW),wireless LAN
更新于2025-09-23 15:22:29
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[IEEE 2019 Second International Workshop on Mobile Terahertz Systems (IWMTS) - Bad Neuenahr, Germany (2019.7.1-2019.7.3)] 2019 Second International Workshop on Mobile Terahertz Systems (IWMTS) - Endfire Transition from Coplanar Waveguide-to-WR3 Rectangular Waveguide for Monolithic Integration with THz Photodiodes
摘要： In this paper, an endfire transition from coplanar-to-rectangular waveguide (CPW-to-WR3) for operation in the WR3-band (220-320 GHz) is presented. The transition is designed for providing connectivity between a monolithically integrated InP-based terahertz photodiode (PD) to a WR3 rectangular waveguide. The presented transition is based on a CPW-fed planar dipole antenna designed on InP substrate which placed in the E-plane of the rectangular waveguide. The dipole-based transition converts the direct coupled quasi-TEM CPW mode of the PD output to the TE10 mode of the rectangular waveguide. The proposed design provides a simple approach avoiding complex integration and packaging techniques like air bridges, ribbon-bonds, or via holes. Numerical analysis of the designed transition shows a wideband performance with a 3 dB insertion loss (IL) over 88 GHz bandwidth and a 10 dB return loss (RL) over 53 GHz bandwidth within the WR3-band.
关键词： monolithic integration,Coplanar waveguide (CPW),WR3-band,THz photodiode.,endfire transition
更新于2025-09-12 10:27:22
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[IEEE 2019 IEEE Photonics Conference (IPC) - San Antonio, TX, USA (2019.9.29-2019.10.3)] 2019 IEEE Photonics Conference (IPC) - High-Power Long-Waveguide 1300nm Directly Modulated DFB Laser for 45Gb/s NRZ and 50Gb/s PAM4
摘要： A 1300-nm high-speed high-power directly modulated distributed-feedback laser using floating feeding electrode has been demonstrated. A 5-μm-thick benzocyclobutene was used for planarization to float a coplanar waveguide, connecting a reversed-mesa ridge waveguide of a laser. Low parasitic capacitance was then formed. A long waveguide can thus be fabricated with low roll-off at high-frequency modulation, further enabling high-output optical power. A 250-μm-long waveguide was fabricated, leading to >28-mW optical power with linear operation and ?3-dB bandwidth of 26 GHz. Furthermore, improvement in high-frequency regime and the reduction near resonance peak were found, attaining a broadband and flat frequency response at high current. A 45-Gb/s non-return-to- zero and 50-Gb/s four-level pulse amplitude modulation with 35-km fiber transmission were successfully shown through mod- ulating high-output optical power.
关键词： Coplanar waveguide (CPW),distributed feedback (DFB) lasers,reversed-ridge waveguide (RRW),planarization
更新于2025-09-11 14:15:04
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A novel compact dual-mode SIW filter with wide rejection band and selective response
摘要： A compact dual-mode substrate-integrated waveguide (SIW) bandpass filter with wide upper stopband is presented. A cross shaped slot is etched on the top plane of SIW cavity to alter the second mode (TE201) current distribution and move it closer to the first mode (TE101), to enhance the bandwidth flatness. Removing few via near the excitation ports, provides longer path for the current to resonance and give us the transmission zeros in a simple way. Another 2 TZs are used to improve the stopband by suppressing higher order modes resonances. The designed filter is fabricated and tested and a very good result is achieved to confirm the design idea. There is also a good agreement between the measured and Full Wave simulated results. The fabricated sample realizes a fractional bandwidth of 9.1% at 7.5 GHz center frequency and 2 zeros at 12.5 GHz and 15 GHz.
关键词： dual-mode filter,substrate-integrated waveguide (SIW),coplanar waveguide (CPW),transmission zero
更新于2025-09-10 09:29:36
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COMPLIMENTARY SPLIT RING RESONATOR INSPIRED MEANDERED CPW-FED MONOPOLE ANTENNA FOR MULTIBAND OPERATION
摘要： A novel design of Meandered Coplanar waveguide (CPW) fed CSRR loaded multiband antenna is presented in this paper. A compact triple-band antenna is designed by etching CSRR slots on the radiating element. The proposed antenna shows good performance at all resonant frequencies. The simulation results are discussed and compared with the measured ones. The e?ects of CSRR loading on the radiating element are explained. Parametric studies are carried out and explained in detail. The proposed antenna is fabricated and measured, and the results are compared with the simulated ones. CSRR permittivity characteristics are explained to validate the results. The proposed antenna can be used for C-band, Wireless Local Area Network (WLAN) and International Telecommunications Union (ITU) applications.
关键词： WLAN,Meandered Coplanar waveguide (CPW),CSRR,multiband antenna,C-band,ITU
更新于2025-09-10 09:29:36
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A Wideband HTS Filter Using Strong Coupling Coplanar Spiral Resonator Structure
摘要： A novel coplanar spiral resonator structure (CSRS), which has a stronger coupling strength than normal CPW structure, is introduced. This structure helps to realize the remarkable strong coupling required for low-frequency wideband ?lters. Although no grounded stubs are deployed to balance the ground plane, the slot-line mode of the ?lter is not excited. An eight-pole wideband high-temperature superconducting (HTS) ?lter, with a fractional bandwidth (FBW) of 50% and a center frequency of 322MHz, is developed. The ?lter is designed and fabricated on a 0.5-mm-thick LaAlO3 substrate with a core size of 41mm × 22mm. The measured minimum insertion loss is 0.05dB and the ?rst spurious peak appears at 842 MHz, which is about 2.6 times the center frequency. The measured results agree well with the simulated results.
关键词： high-temperature superconducting (HTS),Wideband bandpass ?lter,coplanar waveguide (CPW)
更新于2025-09-09 09:28:46