Docgi

Well, I shared TEM Horn antenna in this post because it's in Horn Antenna Familia. But we can take this to a new post if necesarry

That is exactly a kind of BALUN. I saw these types BALUN in some articles about Tem Horn Antenna

You may find step file atteched, for the Tem Horn Antenna. I hope this helps TEM_Horn_StepFile.step

My mistake, by saying "All the dimensions you will see are the half of the exact value" They all are the exact value. In my design I wrote diameter, here I wrote radius. I mixed it up, lol Use the same values in pictures

Hi guys, I wanted to share a Discone antenna which has UWB radiation performance. As you can see the results below, antenna works very well between 0.8-15GHz. You may try to increase this up to 18GHz cause I's almots there. All the dimensions you will see are the half of the exact value, except discone heigth and the gap between cone and disk. It's very simple design and in HFSS I cut the design half twice from the center. This way I got the quarter piece of the actual 3D model. Since this design is 360 degrees symmetrical, cutting it like this and doing simulation is 4 times faster. But the key is that the design must be symmetrical. If its 360 degrees symmetrical you can even cut it to 1/8, it's up to you. Disk thickness and cone thickness are 1mm. I didn't show feeding connector dimensions but you may simply use 50ohm bulkhead or panel mount SMA connector.

There is one mistake in dimensions. You can see the rigth one below

Hi guys, Here is one of my favorite antenna type. I'm sharing a Tem Horn Antenna design. I did my simulation only up to 3GHz, but it's possible that this design goes up to 6GHz or more. But need to check it's radiation pattern also because it sometimes can be degradable at high frequencies. Because of it's exponential shape, I put my design as sheet in simulation so it would be faster. Also in real life manufacturing you can actually use copper tape on your 3D printed model or thin copper plates like 0.1 to 0.5mm thickness. Just be careful at soldering the feed. Because of the thin copper layer your 3D printed model can melt easily. This antenna is one of the best way to get wide bandwidth and high gain. I didn't spend much time on this design. Feel free to optimize it and share results with me.

Hi guys, I found an article about S band Collinear antenna. I tried to simulate it and it worked well. I'm sharing the article if you would like to try. All the dimensions are there, except via between top layer and bottom layer of PCB. I just use 1mm diameter via at feeding point. You may see photos below. The results I have in HFSS are similar to the results in article. The only difference I made is PCB type. They use Neltec NY9220 (IM), I used Arlon DiClad880, both look similar. Rogers5880 also can be used but Arlon DiClad880 is more cheaper than Rogers5880. I've got the max gain at 2.6GHz which is 8.3 dBi. It's also 7.8 dBi at 2.4GHz. With some tuning the max gain can be at 2.4GHz but it's already have good performance. For outdoor applications anyone who wants can also add a radome to this design. A Wideband Omnidirectional Printed Array Antenna.pdf

@Admin Well it has 1.6GHz mark on it. Let's see if it is true

@Admin Is there a CST files for this antenna ?

@AmateurRadist If you look at the first picture you send "ground" is look unassigned so there is no reflecting plane in that simulation, assign PEC boundry. Also as you said your design file didn't have S11 plot so I put it myself when I simulate it. To lower VSWR I think you should focus on feeding line and patch sizes. Maybe you could cut feeding point of patches like in below picture. But I think feelind line is more important in your design

@Admin, Is there a CST file you could share ?

I tried a similar design to this and hell yeah looks like it works.

@AmateurRadist I simulated you design and then made some changes. First there are many mistakes I beleive you need to fix and I'll show you some. I did another simulation for wider bandwidth to see antenna performance. Looks like there is lots of optimization to do because if you look at the results antenna has minimum return loss at higher frequencies but max realized gain at lower frequencies. So the whole design should be optimized I guess.

This is also the warning you get, because you also choose solve material inside for conductive material. I don't recomend that option for conductive materials, unless you want to look the Skin effect. If you unclick it the warning is gone

@Admin @AmateurRadist There is ground plane in the design but I realized that you selected "Display Wiframe" option on material properties. If you unclick it you can see ground plane easily

I also tried to simulate this antenna. I had return loss shows that this antenna can work between 800-2700MHz with little tuning but I couldn't get gain up to 5dBi

It looks like there is a ground plane but you made it transparent. If it's possible, would you like to share the aedt file with me. I can examine the whole design for you and maybe optimize it.