Low-loss compact-size slotted waveguide polarization rotator and transformer

An equalizer based on multilayered half mode substrate integrated waveguide (HMSIW) structures with highQ-factor, low loss, and compact size is proposed for the first time. Resonant cavities distributing in the upper substrate and the bottom substrate, with the middle substrate layer which works as the transmission line together, constitute a multilayer structure. The design method and theoretical analysis are summarized first. The mode analysis, simulated results, and measured results are all provided. The measured results show a good performance and are in agreement with the simulated results, and the maximum attenuation slope reaches −16 dB over 12.5 GHz~14.5 GHz. With the use of absorbing pillars, the attenuation andQvalue can be tuned more easily than the other planar equalizers. Compared with the SIW equalizer, the size of this structure reduces by 50%. Furthermore, this structure is suitable for the miniaturization development of equalizers.

Download Full-text

A Low-Loss Self-Packaged Magic-T With Compact Size Using SISL Technology

IEEE Microwave and Wireless Components Letters ◽

10.1109/lmwc.2017.2766566 ◽

2018 ◽

Vol 28 (1) ◽

pp. 13-15 ◽

Cited By ~ 3

Author(s):

Yongqiang Wang ◽

Kaixue Ma ◽

Shouxian Mou

Keyword(s):

Low Loss ◽

Compact Size

Download Full-text

Ultra-compact and low-loss polarization rotator based on plasmonic waveguide

2015 14th International Conference on Optical Communications and Networks (ICOCN) ◽

10.1109/icocn.2015.7203764 ◽

2015 ◽

Author(s):

Kang Hou ◽

Tao Chu

Keyword(s):

Plasmonic Waveguide ◽

Low Loss ◽

Polarization Rotator

Download Full-text

An Ultra-Compact Design of Plasmonic Memristor with Low Loss and High Extinction Efficiency Based on Enhanced Interaction between Filament and Concentrated Plasmon

Photonics ◽

10.3390/photonics8100437 ◽

2021 ◽

Vol 8 (10) ◽

pp. 437

Author(s):

Ye Tian ◽

Saiwen Zhang ◽

Weishi Tan

Keyword(s):

Numerical Simulation ◽

Low Loss ◽

Switching Device ◽

Extinction Efficiency ◽

Vertical Coupling ◽

Compact Size ◽

Telecommunication Wavelength ◽

Numerical Design ◽

Low Insertion Loss ◽

Compact Design

We present a numerical design of the plasmonic memristive switching device operated at the telecommunication wavelength of 1.55 μm, which consists of a triangle-shaped metal taper mounted on top of a Si waveguide, with rational doping in the area below the apex of the taper. This device can achieve optimal vertical coupling of light energy from the Si waveguide to the plasmonic region and, at the same time, focus the plasmon into the apex of the metal taper. Moreover, the area with concentrated plasmon is overlapped with that where the memristive switching occurs, due to the formation/removal of the metallic nano-filament. As a result, the highly distinct transmission induced by the switching of the plasmonic memristor can be produced because of the maximized interactions between the filament and the plasmon. Our numerical simulation shows that the device hasa compact size (610 nm), low insertion loss (~1 dB), and high extinction efficiency (4.6 dB/μm). Additionally, we point out that stabilizing the size of the filament is critical to improve the operation repeatability of the plasmonic memristive switching device.

Download Full-text

Design of Small-size and Low-loss LTCC Filters on Capacitively Loaded Cavities

Additional Conferences (Device Packaging HiTEC HiTEN & CICMT) ◽

10.4071/cicmt-wa23 ◽

2015 ◽

Vol 2015 (CICMT) ◽

pp. 000172-000183

Author(s):

Viacheslav Turgaliev ◽

Dmitry Kholodnyak ◽

Jens Müller ◽

Matthias A. Hein

Keyword(s):

High Performance ◽

Wide Frequency Range ◽

Microwave Filters ◽

Dual Band ◽

Q Factor ◽

Low Loss ◽

Lumped Element ◽

Low Profile ◽

Compact Size ◽

Capacitive Loading

Design of microwave filters for portable electronics is complicated by conflicting requirements to be met simultaneously such as high selectivity, low insertion loss and compact size. Substrate integrated waveguide (SIW) technology allows designing low-profile high-Q resonators and low-loss bandpass filters based thereof. However, SIW filters are not well-suited for telecommunication applications because of remarkably large size in plane. The size of a SIW cavity can be dramatically reduced by a capacitive loading. Capacitively loaded cavities (CLCs) operating in the TM110 mode can be as small as 1/8 of the guided wavelength and even smaller, i.e. comparable in size with lumped-element resonators. Although the unloaded Q-factor decreases proportionally to cavity size, miniaturized CLCs can exhibit much higher Q-factor than that of lumped-element resonators. This paves the way for designing small-size and low-loss filters for wireless communications and different applications. Miniaturized capacitively loaded SIW cavities are favorably implemented by means of the low temperature co-fired ceramics (LTCC) technology. The goal of the paper is to demonstrate manifold possibilities and flexibility offered by the LTCC technology to the design of advanced microwave filters on CLCs. Different design and manufacturing aspects are considered. Various design examples of high-performance LTCC resonators and filters for single- and dual-band wireless applications are presented. The designed resonators and filters were manufactured using the commercial DuPont Green Tape 951 LTCC system. The LTCC filters on miniaturized CLCs are shown advantageous with regard to small size, low loss, and absence of spurious response over a wide frequency range.

Download Full-text

A Low-Loss 74–110-GHz Faraday Polarization Rotator

IEEE Transactions on Microwave Theory and Techniques ◽

10.1109/tmtt.2007.909871 ◽

2007 ◽

Vol 55 (12) ◽

pp. 2495-2501 ◽

Cited By ~ 4

Author(s):

Neal R. Erickson ◽

Ronald M. Grosslein

Keyword(s):

Low Loss ◽

Polarization Rotator

Download Full-text