Antenna bandwidth...

[Externet]

Hello.
A television receiving simple antenna receives fine a dozen channels along the spectrum 50 to 700 MHz... The antenna is not tuneable, it has fixed dimensions. A couple of channels get poor-to-no reception.

There is uncertainty if the not received channel signals are so because :
- their signal strength is weak, or
- the orientation is wrong, or
- temperature affects the propagation, or
- time of the day impairs reception, or
- the dimensions of the receiving elements are not optimal for those channels, or
- the frequency response of the antenna dips at them...

Are these reasonable guesses ?
The channels received fine are in many very different frequencies. How come the fixed receiving elements of the antenna do receive signals with so varied frequencies ?
OR
Why a television antenna with fixed element dimensions receives well a wide variety of frequencies ?

 

[BradtheRad]

All your guesses are correct. And reception can change drastically simply by moving the antenna a few inches.
Years ago when tv broadcasts were analog it was easier to see a difference.
Today a digital channel either shows up fine or intermittently or not at all.

So when my over-the-air reception of certain channels varies, I have my guesses:
Cloud formations, atmospheric layers of this or that type, multi-path. It's not necessarily weather related. There are times I get good reception even during rain or snow.