[Bored chemist]

Did you look at the spatial distribution of the "transmitted" radiation?
You might get something like this
https://en.wikipedia.org/wiki/Airy_disk

[hamdani yusuf (OP)]

Did you look at the spatial distribution of the "transmitted" radiation?
You might get something like this
https://en.wikipedia.org/wiki/Airy_disk

I'm not sure if it's related, because I only measured the central position of the microwave beam.

[hamdani yusuf (OP)]

Meanwhile, I've repeated the investigation on blocking mechanism of microwave using aluminum sheet 0.1 mm thick with various width from 7 to 70 mm, corresponding to around 0.25 to 2.5 wavelengths.

Here is the video. To reduce the filesize, I made the video smaller.

[hamdani yusuf (OP)]

Just when I finished the recording, an idea occurred to me to repeat the same experiment, but the width of the sheet is oriented longitudinally. Would you like to make a guess what the result will be?

[hamdani yusuf (OP)]

Here it is. If you only want to see the final result, just skip to 5:15.

[hamdani yusuf (OP)]

Here is the follow up of previous experiment. The longitudinal metal sheet now acts like the tail of a quarter wavelength metal strip which blocks the microwave transversally. You can also skip to 5:05 if you want to save your time and just want to know the final results.

[hamdani yusuf (OP)]

The last experimental results remind me of power transfer and impedance matching. I'll try to verify this hypothesis in the next experiment using wider strip facing  the receiver.

[hamdani yusuf (OP)]

I also have recorded the experiment but the metal sheet is placed in front of the transmitter. I decided to split the video to make the results easier to follow, also to reduce the length of the video so the editing and uploading can be done faster.

Here is the follow up of previous experiment. The longitudinal metal sheet now acts like the tail of a quarter wavelength metal strip which blocks the microwave transversally. You can also skip to 5:05 if you want to save your time and just want to know the final results.

Spoiler: show

The result is notably different than previous experiment. I think it's due to the metal sheet interacts with the horn antenna of the transmitter. The case is different when the metal sheet is right in front of the receiver

[hamdani yusuf (OP)]

I also have recorded the experiment but the metal sheet is placed in front of the transmitter. I decided to split the video to make the results easier to follow, also to reduce the length of the video so the editing and uploading can be done faster.

Here is the video.

You can see the summary at 4:10 time stamp.

[hamdani yusuf (OP)]

In these videos, the width of metal strip facing the receiver or transmitter is a half wavelength.

[hamdani yusuf (OP)]

Here's another video demonstrating longitudinal blocking by L-Shaped 3/4 wavelength metal sheet on receiver side.

You can skip to 3:45 to see the result.

It's interesting that the trend is significantly different compared to when it's done from transmitter side. I'm editing the video, and it'll be uploaded as soon as it's done. Stay tuned.

[hamdani yusuf (OP)]

Here's another video demonstrating longitudinal blocking by L-Shaped 3/4 wavelength metal sheet on transmitter side.

These seemingly boring experiments are meant to show that longitudinally oriented conductor which has no effect on propagation of light can have some effects if it's connected to a transversally oriented conductor. I have a plan to replicate this kind of experiments, but with those conductors disconnected. I guess we will still see some effects, although not as big as when they are connected.
The experiments also show that depicting light propagation as a stream of point-like particle is an over-simplification.

[hamdani yusuf (OP)]

I've finished recording an experiment with double aluminum sheet, which is made of a folded sheet with a layer of plastic duct tape between the front and rear sheet to prevent direct electrical conduction. I hope to finish the editing soon so I can share it with you.

There are many ideas crossing my mind already to improve our understanding on how light behaves, especially in microwave frequency. But there's one that makes me interested to do as soon as possible. I think that polarization, especially the circular/elliptical type, is one behavior of light which is less understood, or even misunderstood by lay persons.
After many sessions of brainstorming, I made a decision to build an interferometer to demonstrate this behavior, which hopefully can help to understand it better. Based on its shape, I think I can rightly call it much greater than interferometer. It has some resemblance with the second diagram below. It will let me split the incoming microwave into vertically and horizontally polarized wave with different trajectory, and gives me control to adjust their path lengths independently.


http://www.industrial-electronics.com/laser_9.html

With horizontally oriented metal grids replacing the beam splitters, and reflectors replacing the corner cube, I expect to get an elliptically polarized microwave in the receiver when the transmitter is rotated by 45 degree. The distance between the polarizers and the reflectors will determine the orientation as well as the polarization state of received microwave. I should be able to produce +/- 45° linearly polarized microwave, elliptically or circularly polarized microwave, either in clockwise or counterclockwise direction, by simply adjusting the distance between the polarizers and the reflectors. Let me know what you think of this idea.

[hamdani yusuf (OP)]

Meanwhile, here's another experiment demonstrating blocking of microwave transmission by double layer metal sheet.

[hamdani yusuf (OP)]

While preparing the much greater than interferometer, I inadvertently found interesting effects with a linear polarizer when placed between transmitter and receiver in longitudinal orientation.
I hope I can upload the video soon to share it with you.

[hamdani yusuf (OP)]

While preparing the much greater than interferometer, I inadvertently found interesting effects with a linear polarizer when placed between transmitter and receiver in longitudinal orientation.
I hope I can upload the video soon to share it with you.

Here it is

Investigation on Microwave Transceiver 69: Longitudinal Polarizer
Demonstration of the effect of linear polarizer when oriented longitudinally.

[hamdani yusuf (OP)]

Based on its shape, I think I can rightly call it much greater than interferometer.

Investigation on Microwave Transceiver 70 : Construction of Much Greater Than Interferometer
Design and construction of a type of interferometer to investigate deeper on polarization and phase changing

[hamdani yusuf (OP)]

When editing the experiment with double reflector, I got an idea that diagonally polarized microwave can produce interesting results. I hope to share the new video with you soon. Stay tuned.

[hamdani yusuf (OP)]

When editing the experiment with double reflector, I got an idea that diagonally polarized microwave can produce interesting results. I hope to share the new video with you soon. Stay tuned.

Here it is. I hope you enjoy it.

[hamdani yusuf (OP)]

Based on its shape, I think I can rightly call it much greater than interferometer.

Investigation on Microwave Transceiver 70 : Construction of Much Greater Than Interferometer
Design and construction of a type of interferometer to investigate deeper on polarization and phase changing

It turns out that the design is similar to my plan of an experiment using single photon.
https://www.thenakedscientists.com/forum/index.php?topic=68595.msg646801#msg646801