Pozar, Microwave Engineering, John Wiley & Sons, 1998. The resonance can easily be removed in the current frequency sweep range by adding a metallic post in the middle of the cavity. This is the dominant TE101 mode of the rectangular cavity resonator partially filled with a dielectric substrate. Gure 4: The phases on the two output ports show approximately 90-degree shift at 3 GHz.īecause the metallic housing works as a rectangular cavity, there is a resonance observed around 4.6 GHz. The coupled signal at the two output ports 21 and S31) is about -3 dB at 3 GHz. Gure 3: The frequency response of the branch line coupler shows good input matching 11) and isolation (S41) around 3 GHz. The evaluated phase shift between the two output ports is 89.9.įi 3 | B R A N C H - L I N E C O U P L E R he input signal is barely coupled to the isolation port where S41 is less than 30 dB 3 GHz. At a frequency of 3 GHz, the gnal is evenly split between the two output ports with a very small amount of losses. He computed S-parameters are plotted in Figure 3. A good ruleį thumb is to use approximately five elements per wavelength in each material. The model is meshed using a tetrahedral mesh. A small air domain bounded by a PEC surface around e device is also modeled. Some exterior faces are removed for sualization. Igure 2: The model of the branch line coupler. PEC face that represents the ground plane, and the PEC faces that represent the microstrip line at each port. he four ports are modeled as small rectangular faces that bridge the gap between the The entire odeling domain is bounded by PEC boundaries that represent the device packaging. The microstrip es are modeled as perfect electric conductor (PEC) surfaces, and another PEC rface on the bottom of the dielectric substrate acts as a ground plane. The design is realized microstrip lines patterned onto a 0.060 inch dielectric substrate. He form of the branch line coupler is shown schematically in Figure 1.
Gure 1: The geometry of a branch line coupler is symmetric. TdeaslinsumT 1 | B R A N C H - L I N E C O U P L E R Due to its symmetry, any port can be used as the input po For a list of such trademark owners, see Version: October 2014 COMSOL 5.0Ī branch line coupler, also known as a quadrature (90) hybrid, is a four-port network device with one input port, two output ports, with a 90 phase difference between them, and one isolated port. All other trademarks are the property of their respective owners, and COMSOL AB and its subsidiaries and products are not affiliated with, endorsed by, sponsored by, or supported by those trademark owners.
#COMSOL 5.3 VIDEO SOFTWARE LICENSE#
This Documentation and the Programs described herein are furnished under the COMSOL Software License Agreement (and may be used or copied only under the terms of the license agreement.ĬOMSOL, COMSOL Multiphysics, Capture the Concept, COMSOL Desktop, and LiveLink are either registered trademarks or trademarks of COMSOL AB.
R F M o d u l e M o d e l L i b r a r y M a n u a l 19982014 COMSOL Support Center: Product Download: Product Updates: Discussion Forum: Events: COMSOL Video Gallery: Support Knowledge Base: Part number: CM021002 If you need to contact Support, an online request form is located at the COMSOL Access page at Other useful links include: You can also visit the Worldwide Sales Offices page at for address and contact information. Learn about other useful tools for postprocessing in COMSOL Multiphysics ® on the blog.Visit the Contact COMSOL page at to submit general inquiries, contact Technical Support, or search for an address and phone number. We discuss the study types that precipitate animations, including: Of course, to create animations, you need multiple results. We also recommend producing the animation in the Graphics window first to see how it looks before exporting it to a file.
To export a quality animation, it is important to adjust the number of frames, frame rate, and resolution of your animation.
In this video, we go over the basics of creating and exporting animations and discuss a few best practices. Whether you are showing your results in a presentation, on the web, or as a standalone video file, exporting animations will help you get your point across. Showing visually engaging animations can be extremely valuable when conveying the results of your COMSOL Multiphysics ® model.
0 kommentar(er)
