Rectangular waveguide fed DRA using tapered waveguide section

2015 ◽  
Vol 57 (9) ◽  
pp. 2025-2028 ◽  
Author(s):  
P. M. Jasmine ◽  
P. Abdulla ◽  
P. M. Raphika
Keyword(s):  
Rectangular Waveguide ◽  
Waveguide Section ◽  
Tapered Waveguide

scholarly journals Reflection resonances in a rectangular waveguide section with a pair of antipodal rectangular posts

2016 ◽  
Vol 21 (1) ◽  
pp. 15-21
Author(s):  
L. Mospan ◽  
◽  
S. Prikolotin ◽  
А. Кirilenko
Keyword(s):  
Rectangular Waveguide ◽  
Waveguide Section

scholarly journals Nanocouplers for Infrared and Visible Light

2012 ◽  
Vol 2012 ◽  
pp. 1-17 ◽  
Author(s):  
A. Andryieuski ◽  
A. V. Lavrinenko
Keyword(s):  
Visible Light ◽  
Waveguide Section ◽  
Practical Applications ◽  
Essential Component ◽  
The Past ◽  
Plasmonic Structures ◽  
Tapered Waveguide ◽  
Physical Principles

An efficient and compact coupler—a device that matches a microwaveguide and a nanowaveguide—is an essential component for practical applications of nanophotonic systems. The number of coupling approaches has been rapidly increasing in the past ten years with the help of plasmonic structures and metamaterials. In this paper we overview recent as well as common solutions for nanocoupling. More specifically we consider the physical principles of operation of the devices based on a tapered waveguide section, a direct coupler, a lens, and a scatterer and support them with a number of examples.

scholarly journals On the applicability of numerical tools for simulating wave-ports close to the cutoff frequency

2022 ◽  
Vol 12 (2) ◽  
pp. 1724
Author(s):  
Eman Mohamed Eldesouki ◽  
Khalid Mustafa Ibrahim ◽  
Ahmed Mohmed Attiya
Keyword(s):  
Reflection Coefficient ◽  
Computer Aided Design ◽  
Original Problem ◽  
Cutoff Frequency ◽  
Horn Antenna ◽  
Cad Tools ◽  
Waveguide Section ◽  
Tapered Waveguide ◽  
Computer Aided ◽  
Aided Design

This paper focuses on a common drawback in electromagnetic numerical computer aided design computer aided design (CAD) tools: high frequency structure simulator (HFSS), computer simulation technology (CST) and FEKO, where the excitation by using a wave-port below and close to the cutoff frequency has unreliable values for the reflection coefficient. An example for such problem is presented in the design of a dual horn antenna fed by two different waveguide sections. To overcome this numerical error in the results of these CAD tools, a tapered waveguide section is used in the simulation as an excitation mechanism to the feeding waveguide. The cross section of the input port at this tapered waveguide section is designed to have a cutoff frequency smaller than the lowest frequency under investigation for the original problem. Then, by extracting the effect of the tapered section from the obtained reflection coefficient, it would be possible to obtain the reflection coefficient of the original problem.

A multi-function resonator based on an asymmetric tri-post rectangular waveguide section

2020 ◽  
Vol 12 (10) ◽  
pp. 1005-1011 ◽  
Author(s):  
Lyudmila P. Mospan ◽  
Sergiy O. Steshenko
Keyword(s):  
Cross Section ◽  
Rectangular Waveguide ◽  
Measurement Data ◽  
Waveguide Resonator ◽  
Waveguide Section ◽  
The Third ◽  
Filtering Function ◽  
Operating Regimes ◽  
Resonant Phenomena

AbstractA novel waveguide resonator is proposed in the paper. The resonator is composed of three rectangular partial-height posts inserted along a rectangular waveguide cross-section. A pair of lateral posts is mounted symmetrically whereas the third antipodal post is centered. The resonator enables bandreject, singlet-type, and pseudoelliptic responses. The operating regimes are achieved by a manipulation with the pair of lateral posts, namely by changing their heights or their locations in a waveguide cross-section. A filtering function is realized as the third mode is exploited as the resonant one. Measurement data are presented for WR90 waveguide. An explanation of the resonant phenomena in post-based sections in terms of eigen regimes and interacting oscillations is proposed.

Ka Band Transition between Rectangular Waveguide and Substrate Integrated Waveguide

2012 ◽  
Vol 443-444 ◽  
pp. 362-365 ◽  
Author(s):  
Ya Zhou Dong ◽  
Shi Wei Dong ◽  
Zhong Bo Zhu ◽  
Ying Wang
Keyword(s):  
Rectangular Waveguide ◽  
Impedance Matching ◽  
Ultra Wideband ◽  
Substrate Integrated Waveguide ◽  
Low Loss ◽  
Ka Band ◽  
Ansoft Hfss ◽  
Tapered Waveguide ◽  
Band Transition ◽  
Better Than

This paper presents novel designs of Ka band transitions between standard rectangular waveguide and substrate integrated waveguide (SIW). The proposed transitions can provide simultaneous field and impedance matching. The transition with a height-tapered waveguide exhibits outstanding low-loss performance over an ultra-wideband range (entire Ka-band). And the other one with Chebyshev transformers has a compact profile and low loss better than 2dB in a bandwidth of 11GHz at Ka band. The simulation and analysis of the transitions are carried out with Ansoft HFSS.

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