I haven't had a cable TV for the last several years since I found my family didn't need so many (too many) channels and could watch handful of channels for free through antenna. It's called OTA (over the air) channels. You may have to give up some of your favorite channels (I personally miss the Discovery and Family channels) from the cable TV providers, but it's FREE!! Depending on your location and orientation of the antenna, you could get several to over 30 channels.
There are commercial products both indoor and outdoor. The outdoor antennas certainly work (much) better than indoor antennas because their elevation from the ground is high so they can catch more signals and there is no obstacles such as wall or house structures compared to the indoor antennas.
But the indoor antennas have their own benefits: 1) you don't have to climb up the roof to install and maintain it; 2) you don't have to worry about thunder or lightening; 3) it's relatively cheaper than outdoor ones because it doesn't need long cable and fixture material.
So, as long as your location is in or near urban area and you have a proper spot inside your house to put it and want to create your own antenna with various shapes and sizes, give an indoor FREE TV antenna a try!
Here is my version.
The aluminum foil in the kitchen is always handy. I needed a support to attach two pieces of aluminum foil and found a piece of cardboard box. The size of each side of the aluminum foil is 250mm x 215mm. I didn’t test other than this size but it works good enough. You may want to try different size and shape of similar design for your TV. I could get over 20 channels with this.
Step 1: previous version
I moved to this new house a few months ago and as soon as we moved in, I quickly made this antenna.
I found this TV antenna design from internet some time ago and it really works quite well. A matching transformer in the middle in this picture is missing since I have already removed it to a new design. This one works fine but I don’t want to put this one on top of the roof because I don’t want to take any risk of thunder or even climbing up to the roof, nor to hang it on the living room wall because it is not that small (about 1m high) and doesn’t look pretty. So I decided to test very simple antenna that is cheap, small enough to be hidden behind a picture frame, and indoor.