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Hi. I know this is late but this is the explanation for your resonance frequencies. From theory, the first resonant mode will be λ/4 wavelength frequency. The second mode will be one and a half standing waves within the monopole length which means there are three λ/4 wavelengths resonating and...
Hi,
I'm trying to design an amplifier and I am running simulations using AWRs Microwave Office. I have got a transistor from avago and copied and pasted the s-parameters into microwave office. I am having trouble designing the input and matching circuits. I have used several calculations but...
When the transient solver has not been satisfied, it means there is a problem with your structure, mesh definition or boundary conditions. What antenna are you simulating? If it is a patch antenna, check the port dimensions and check the port is touching the microstrip feed. If you're still...
I have looked at your file and the problem is the location of your port. I have amended the port dimensions and locations and this has fixed the port problem. The S11 however shows a poor match so look at your material and see what the problem is. You could perhaps use an FR-4 substrate and...
Hi everyone,
I am trying to interpret the results accumulated from my monopole measurement in an Anechoic Chamber. I constructed a reconfigurable monopole and the simulations show accurate results. However, when it comes to measuring the fabricated prototype, I am confused as to what...
The radiation pattern for the monopole antenna is strongly affected by a finite sized ground plane while the impedance of a monopole antenna is minimally affected. You can get lots of information from journals at IEEE Xplore.
Hi,
I am trying to construct a simple RF transmitter working at 2.4GHz. I am looking for around 18dBm output from the circuit. I would like to use a filter for added harmonic purity. I will add a simple antenna at the end, most like a dipole. I also need a transistor which will need to be...
Hi guys,
I am designing a monopole with two cables attached to it. The ground plane is on top of the substrate and i'm hoping to feed the monopole by a coaxial feed from the bottom of the substrate. I have tried 'picking the face' of the bottom of the monopole and creating a waveguide...
Hi everyone,
I want to produce a new beam switching high gain antenna array that is able to direct its main beam towards predetermined locations. I aim to use PIN diodes to control antenna segments or feeding networks to enable beam switching. I am also using CST to simulate the patch...
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