jarodcs
Newbie
Hello fellows
Please I seek for your help on this setup that is making doubt about my week concepts.
The attached files correspond to 02 images and 01 CST 3D model file of a dielectric-filled (Er=38) quarter-wavelength coaxial resonator.
As you can see the resonator is a square coaxial section with a metal inner conductor and a metal outer coating.
The EM boundaries is PEC on all the walls, and the background is "Normal" (Er=1). The excitation is connected from the top PEC boundary towards the inner conductor. I had to put a lumped parallel-RLC circuit (with R=50, L=0, C=0) between the Lumped Port and the inner conductor because without it, the S11 was horrendous (something with the coupling, it has to be, right?)
The site (https://www.changpuak.ch/electronics/calc_20.php) provides a calculator to find out the RLC equivalent circuit of a dielectric resonator of this kind.
These are the parameters I'm using for the square section (square side = 6mm, inner hole radious = 2mm, resonator length = 15 mm, relative permittivity Er= 38)
With those parameters, resonance frequency should in the neighbor of 800 MHz (700 - 900 MHz).
However, when simulation is performed with a waveport placed on the open side of the resonator, grounded with the outer coating, it does not work the simulaiton.
And I had use the lumped port to cause some s11 acceptable answer. But I don't know if I'm doing ok.
Can you please, take a look?
Thanks so much in advance
Please I seek for your help on this setup that is making doubt about my week concepts.
The attached files correspond to 02 images and 01 CST 3D model file of a dielectric-filled (Er=38) quarter-wavelength coaxial resonator.
As you can see the resonator is a square coaxial section with a metal inner conductor and a metal outer coating.
The EM boundaries is PEC on all the walls, and the background is "Normal" (Er=1). The excitation is connected from the top PEC boundary towards the inner conductor. I had to put a lumped parallel-RLC circuit (with R=50, L=0, C=0) between the Lumped Port and the inner conductor because without it, the S11 was horrendous (something with the coupling, it has to be, right?)
The site (https://www.changpuak.ch/electronics/calc_20.php) provides a calculator to find out the RLC equivalent circuit of a dielectric resonator of this kind.
These are the parameters I'm using for the square section (square side = 6mm, inner hole radious = 2mm, resonator length = 15 mm, relative permittivity Er= 38)
With those parameters, resonance frequency should in the neighbor of 800 MHz (700 - 900 MHz).
However, when simulation is performed with a waveport placed on the open side of the resonator, grounded with the outer coating, it does not work the simulaiton.
And I had use the lumped port to cause some s11 acceptable answer. But I don't know if I'm doing ok.
Can you please, take a look?
Thanks so much in advance
