HFSS eigenmode for resonance of left-hand patch antenna
时间：04-08
整理：3721RD
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Hi there. I was hoping that someone could look over the design from HFSS that I have attached.
I am trying to simulate and reproduce the results of the 3x3 patch antenna and IDC array described in Small Antenna using 2-D Interdigital Composite Right/Left-Handed (CRLH) Transmission Lines by Lim, Park and Kwak (2008).
Essentially it is a 3x3 array of Sievenpiper mushrooms connected by interdigital caps to increase the capacitance between patches.
I have recreated the antenna they have by modelling one quarter of it and assigning two perfect H axes of symmetry to mirror the other quadrants. At the bottom of the substrate is an infinite ground plane.
When I run the eigensolver on this, I get a resonant frequency of around 1.7GHz, but in the paper they say the n=-2 mode is 2.724GHz and the n=-1 mode is 3.028GHz. So I'm doing something wrong.
My background is in mechanical engineering and mechatronics, not RF engineering so I apologise if I have made a really obvious error! I'm starting to work on a project to measure strain by observing the change in resonant frequency of a patch under load, so a simulation of this type is the first step, but I'm a bit lost as you can tell.
In short, am I going about simulating this type of left-handed structure in the correct way? Is this method the correct way to find the various resonant frequencies of the negative n modes?
Thanks for taking the time to look at this.
I am trying to simulate and reproduce the results of the 3x3 patch antenna and IDC array described in Small Antenna using 2-D Interdigital Composite Right/Left-Handed (CRLH) Transmission Lines by Lim, Park and Kwak (2008).
Essentially it is a 3x3 array of Sievenpiper mushrooms connected by interdigital caps to increase the capacitance between patches.
I have recreated the antenna they have by modelling one quarter of it and assigning two perfect H axes of symmetry to mirror the other quadrants. At the bottom of the substrate is an infinite ground plane.
When I run the eigensolver on this, I get a resonant frequency of around 1.7GHz, but in the paper they say the n=-2 mode is 2.724GHz and the n=-1 mode is 3.028GHz. So I'm doing something wrong.
My background is in mechanical engineering and mechatronics, not RF engineering so I apologise if I have made a really obvious error! I'm starting to work on a project to measure strain by observing the change in resonant frequency of a patch under load, so a simulation of this type is the first step, but I'm a bit lost as you can tell.
In short, am I going about simulating this type of left-handed structure in the correct way? Is this method the correct way to find the various resonant frequencies of the negative n modes?
Thanks for taking the time to look at this.